203 files changed, 38003 insertions, 0 deletions

diff --git a/arch/tile/Kbuild b/arch/tile/Kbuild
new file mode 100644
index 000000000000..a9b922716092
--- /dev/null
+++ b/arch/tile/Kbuild
@@ -0,0 +1,3 @@
+
+obj-y += kernel/
+obj-y += mm/
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
new file mode 100644
index 000000000000..1eb308cb711a
--- /dev/null
+++ b/arch/tile/Kconfig
@@ -0,0 +1,356 @@
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/config-language.txt.
+
+config MMU
+        def_bool y
+
+config GENERIC_CSUM
+        def_bool y
+
+config GENERIC_HARDIRQS
+        def_bool y
+
+config GENERIC_HARDIRQS_NO__DO_IRQ
+        def_bool y
+
+config GENERIC_IRQ_PROBE
+        def_bool y
+
+config GENERIC_PENDING_IRQ
+        def_bool y
+        depends on GENERIC_HARDIRQS && SMP
+
+config SEMAPHORE_SLEEPERS
+        def_bool y
+
+config HAVE_ARCH_ALLOC_REMAP
+        def_bool y
+
+config HAVE_SETUP_PER_CPU_AREA
+        def_bool y
+
+config NEED_PER_CPU_PAGE_FIRST_CHUNK
+        def_bool y
+
+config SYS_SUPPORTS_HUGETLBFS
+        def_bool y
+
+config GENERIC_TIME
+        def_bool y
+
+config GENERIC_CLOCKEVENTS
+        def_bool y
+
+# FIXME: tilegx can implement a more efficent rwsem.
+config RWSEM_GENERIC_SPINLOCK
+        def_bool y
+
+# We have a very flat architecture from a migration point of view,
+# so save boot time by presetting this (particularly useful on tile-sim).
+config DEFAULT_MIGRATION_COST
+        int
+        default "10000000"
+
+# We only support gcc 4.4 and above, so this should work.
+config ARCH_SUPPORTS_OPTIMIZED_INLINING
+        def_bool y
+
+config ARCH_PHYS_ADDR_T_64BIT
+        def_bool y
+
+config LOCKDEP_SUPPORT
+        def_bool y
+
+config STACKTRACE_SUPPORT
+        def_bool y
+        select STACKTRACE
+
+# We use discontigmem for now; at some point we may want to switch
+# to sparsemem (Tilera bug 7996).
+config ARCH_DISCONTIGMEM_ENABLE
+        def_bool y
+
+config ARCH_DISCONTIGMEM_DEFAULT
+        def_bool y
+
+config TRACE_IRQFLAGS_SUPPORT
+        def_bool y
+
+config STRICT_DEVMEM
+        def_bool y
+
+# SMP is required for Tilera Linux.
+config SMP
+        def_bool y
+
+# Allow checking for compile-time determined overflow errors in
+# copy_from_user().  There are still unprovable places in the
+# generic code as of 2.6.34, so this option is not really compatible
+# with -Werror, which is more useful in general.
+config DEBUG_COPY_FROM_USER
+        def_bool n
+
+config HVC_TILE
+        select HVC_DRIVER
+        def_bool y
+
+config TILE
+        def_bool y
+        select GENERIC_FIND_FIRST_BIT
+        select GENERIC_FIND_NEXT_BIT
+        select USE_GENERIC_SMP_HELPERS
+        select CC_OPTIMIZE_FOR_SIZE
+
+# FIXME: investigate whether we need/want these options.
+#       select HAVE_IOREMAP_PROT
+#       select HAVE_OPTPROBES
+#       select HAVE_REGS_AND_STACK_ACCESS_API
+#       select HAVE_HW_BREAKPOINT
+#       select PERF_EVENTS
+#       select HAVE_USER_RETURN_NOTIFIER
+#       config NO_BOOTMEM
+#       config ARCH_SUPPORTS_DEBUG_PAGEALLOC
+#       config HUGETLB_PAGE_SIZE_VARIABLE
+
+
+mainmenu "Linux/TILE Kernel Configuration"
+
+# Please note: TILE-Gx support is not yet finalized; this is
+# the preliminary support.  TILE-Gx drivers are only provided
+# with the alpha or beta test versions for Tilera customers.
+config TILEGX
+        depends on EXPERIMENTAL
+        bool "Building with TILE-Gx (64-bit) compiler and toolchain"
+
+config 64BIT
+        depends on TILEGX
+        def_bool y
+
+config ARCH_DEFCONFIG
+        string
+        default "arch/tile/configs/tile_defconfig" if !TILEGX
+        default "arch/tile/configs/tilegx_defconfig" if TILEGX
+
+source "init/Kconfig"
+
+menu "Tilera-specific configuration"
+
+config NR_CPUS
+        int "Maximum number of tiles (2-255)"
+        range 2 255
+        depends on SMP
+        default "64"
+        ---help---
+          Building with 64 is the recommended value, but a slightly
+          smaller kernel memory footprint results from using a smaller
+          value on chips with fewer tiles.
+
+source "kernel/time/Kconfig"
+
+source "kernel/Kconfig.hz"
+
+config KEXEC
+        bool "kexec system call"
+        ---help---
+          kexec is a system call that implements the ability to shutdown your
+          current kernel, and to start another kernel.  It is like a reboot
+          but it is independent of the system firmware.   It is used
+          to implement the "mboot" Tilera booter.
+
+          The name comes from the similarity to the exec system call.
+
+config COMPAT
+        bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
+        depends on TILEGX
+        select COMPAT_BINFMT_ELF
+        default y
+        ---help---
+          If enabled, the kernel will support running TILE-Gx binaries
+          that were built with the -m32 option.
+
+config SYSVIPC_COMPAT
+        def_bool y
+        depends on COMPAT && SYSVIPC
+
+# We do not currently support disabling HIGHMEM on tile64 and tilepro.
+config HIGHMEM
+        bool # "Support for more than 512 MB of RAM"
+        default !TILEGX
+        ---help---
+          Linux can use the full amount of RAM in the system by
+          default.  However, the address space of TILE processors is
+          only 4 Gigabytes large. That means that, if you have a large
+          amount of physical memory, not all of it can be "permanently
+          mapped" by the kernel. The physical memory that's not
+          permanently mapped is called "high memory".
+
+          If you are compiling a kernel which will never run on a
+          machine with more than 512 MB total physical RAM, answer
+          "false" here. This will result in the kernel mapping all of
+          physical memory into the top 1 GB of virtual memory space.
+
+          If unsure, say "true".
+
+# We do not currently support disabling NUMA.
+config NUMA
+        bool # "NUMA Memory Allocation and Scheduler Support"
+        depends on SMP && DISCONTIGMEM
+        default y
+        ---help---
+          NUMA memory allocation is required for TILE processors
+          unless booting with memory striping enabled in the
+          hypervisor, or with only a single memory controller.
+          It is recommended that this option always be enabled.
+
+config NODES_SHIFT
+        int "Log base 2 of the max number of memory controllers"
+        default 2
+        depends on NEED_MULTIPLE_NODES
+        ---help---
+          By default, 2, i.e. 2^2 == 4 DDR2 controllers.
+          In a system with more controllers, this value should be raised.
+
+# Need 16MB areas to enable hugetlb
+# See build-time check in arch/tile/mm/init.c.
+config FORCE_MAX_ZONEORDER
+        int
+        default 9
+
+choice
+        depends on !TILEGX
+        prompt "Memory split" if EMBEDDED
+        default VMSPLIT_3G
+        ---help---
+          Select the desired split between kernel and user memory.
+
+          If the address range available to the kernel is less than the
+          physical memory installed, the remaining memory will be available
+          as "high memory". Accessing high memory is a little more costly
+          than low memory, as it needs to be mapped into the kernel first.
+          Note that increasing the kernel address space limits the range
+          available to user programs, making the address space there
+          tighter.  Selecting anything other than the default 3G/1G split
+          will also likely make your kernel incompatible with binary-only
+          kernel modules.
+
+          If you are not absolutely sure what you are doing, leave this
+          option alone!
+
+        config VMSPLIT_375G
+                bool "3.75G/0.25G user/kernel split (no kernel networking)"
+        config VMSPLIT_35G
+                bool "3.5G/0.5G user/kernel split"
+        config VMSPLIT_3G
+                bool "3G/1G user/kernel split"
+        config VMSPLIT_3G_OPT
+                bool "3G/1G user/kernel split (for full 1G low memory)"
+        config VMSPLIT_2G
+                bool "2G/2G user/kernel split"
+        config VMSPLIT_1G
+                bool "1G/3G user/kernel split"
+endchoice
+
+config PAGE_OFFSET
+        hex
+        default 0xF0000000 if VMSPLIT_375G
+        default 0xE0000000 if VMSPLIT_35G
+        default 0xB0000000 if VMSPLIT_3G_OPT
+        default 0x80000000 if VMSPLIT_2G
+        default 0x40000000 if VMSPLIT_1G
+        default 0xC0000000
+
+source "mm/Kconfig"
+
+config CMDLINE_BOOL
+        bool "Built-in kernel command line"
+        default n
+        ---help---
+          Allow for specifying boot arguments to the kernel at
+          build time.  On some systems (e.g. embedded ones), it is
+          necessary or convenient to provide some or all of the
+          kernel boot arguments with the kernel itself (that is,
+          to not rely on the boot loader to provide them.)
+
+          To compile command line arguments into the kernel,
+          set this option to 'Y', then fill in the
+          the boot arguments in CONFIG_CMDLINE.
+
+          Systems with fully functional boot loaders (e.g. mboot, or
+          if booting over PCI) should leave this option set to 'N'.
+
+config CMDLINE
+        string "Built-in kernel command string"
+        depends on CMDLINE_BOOL
+        default ""
+        ---help---
+          Enter arguments here that should be compiled into the kernel
+          image and used at boot time.  If the boot loader provides a
+          command line at boot time, it is appended to this string to
+          form the full kernel command line, when the system boots.
+
+          However, you can use the CONFIG_CMDLINE_OVERRIDE option to
+          change this behavior.
+
+          In most cases, the command line (whether built-in or provided
+          by the boot loader) should specify the device for the root
+          file system.
+
+config CMDLINE_OVERRIDE
+        bool "Built-in command line overrides boot loader arguments"
+        default n
+        depends on CMDLINE_BOOL
+        ---help---
+          Set this option to 'Y' to have the kernel ignore the boot loader
+          command line, and use ONLY the built-in command line.
+
+          This is used to work around broken boot loaders.  This should
+          be set to 'N' under normal conditions.
+
+config VMALLOC_RESERVE
+        hex
+        default 0x1000000
+
+config HARDWALL
+        bool "Hardwall support to allow access to user dynamic network"
+        default y
+
+endmenu  # Tilera-specific configuration
+
+menu "Bus options"
+
+config NO_IOMEM
+        def_bool !PCI
+
+config NO_IOPORT
+        def_bool !PCI
+
+source "drivers/pci/Kconfig"
+
+source "drivers/pci/hotplug/Kconfig"
+
+endmenu
+
+menu "Executable file formats"
+
+# only elf supported
+config KCORE_ELF
+        def_bool y
+        depends on PROC_FS
+
+source "fs/Kconfig.binfmt"
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/tile/Kconfig.debug"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
diff --git a/arch/tile/Kconfig.debug b/arch/tile/Kconfig.debug
new file mode 100644
index 000000000000..a81f0fbf7e60
--- /dev/null
+++ b/arch/tile/Kconfig.debug
@@ -0,0 +1,43 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config EARLY_PRINTK
+        bool "Early printk" if EMBEDDED && DEBUG_KERNEL
+        default y
+        help
+          Write kernel log output directly via the hypervisor console.
+
+          This is useful for kernel debugging when your machine crashes very
+          early before the console code is initialized. For normal operation
+          it is not recommended because it looks ugly and doesn't cooperate
+          with klogd/syslogd. You should normally N here,
+          unless you want to debug such a crash.
+
+config DEBUG_STACKOVERFLOW
+        bool "Check for stack overflows"
+        depends on DEBUG_KERNEL
+        help
+          This option will cause messages to be printed if free stack space
+          drops below a certain limit.
+
+config DEBUG_STACK_USAGE
+        bool "Stack utilization instrumentation"
+        depends on DEBUG_KERNEL
+        help
+          Enables the display of the minimum amount of free stack which each
+          task has ever had available in the sysrq-T and sysrq-P debug output.
+
+          This option will slow down process creation somewhat.
+
+config DEBUG_EXTRA_FLAGS
+        string "Additional compiler arguments when building with '-g'"
+        depends on DEBUG_INFO
+        default ""
+        help
+          Debug info can be large, and flags like
+          `-femit-struct-debug-baseonly' can reduce the kernel file
+          size and build time noticeably.  Such flags are often
+          helpful if the main use of debug info is line number info.
+
+endmenu
diff --git a/arch/tile/Makefile b/arch/tile/Makefile
new file mode 100644
index 000000000000..fd8f6bb5face
--- /dev/null
+++ b/arch/tile/Makefile
@@ -0,0 +1,54 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies. Remember to do have actions
+# for "archclean" and "archdep" for cleaning up and making dependencies for
+# this architecture
+
+# If building with TILERA_ROOT set (i.e. using the Tilera Multicore
+# Development Environment) we can set CROSS_COMPILE based on that.
+# If we're not cross-compiling, make sure we're on the right architecture.
+# Only bother to test for a few common targets, to avoid useless errors.
+ifeq ($(CROSS_COMPILE),)
+  ifdef TILERA_ROOT
+    CROSS_COMPILE := $(TILERA_ROOT)/bin/tile-
+  else
+    goals := $(if $(MAKECMDGOALS), $(MAKECMDGOALS), all)
+    ifneq ($(strip $(filter vmlinux modules all,$(goals))),)
+      HOST_ARCH := $(shell uname -m)
+      ifneq ($(HOST_ARCH),$(ARCH))
+$(error Set TILERA_ROOT or CROSS_COMPILE when building $(ARCH) on $(HOST_ARCH))
+      endif
+    endif
+  endif
+endif
+
+
+KBUILD_CFLAGS   += $(CONFIG_DEBUG_EXTRA_FLAGS)
+
+LIBGCC_PATH     := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+# Provide the path to use for "make defconfig".
+KBUILD_DEFCONFIG := $(ARCH)_defconfig
+
+# Used as a file extension when useful, e.g. head_$(BITS).o
+# Not needed for (e.g.) "$(CC) -m32" since the compiler automatically
+# uses the right default anyway.
+export BITS
+ifeq ($(CONFIG_TILEGX),y)
+BITS := 64
+else
+BITS := 32
+endif
+
+head-y          := arch/tile/kernel/head_$(BITS).o
+
+libs-y          += arch/tile/lib/
+libs-y          += $(LIBGCC_PATH)
+
+
+# See arch/tile/Kbuild for content of core part of the kernel
+core-y          += arch/tile/
diff --git a/arch/tile/configs/tile_defconfig b/arch/tile/configs/tile_defconfig
new file mode 100644
index 000000000000..919c54afd981
--- /dev/null
+++ b/arch/tile/configs/tile_defconfig
@@ -0,0 +1,71 @@
+CONFIG_EXPERIMENTAL=y
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="usr/contents.txt"
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_HZ_100=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_INET_DIAG is not set
+CONFIG_IPV6=y
+# CONFIG_WIRELESS is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_SCSI_CONSTANTS=y
+CONFIG_SCSI_LOGGING=y
+CONFIG_NETDEVICES=y
+CONFIG_TUN=y
+# CONFIG_NETDEV_10000 is not set
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_HW_RANDOM is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+# CONFIG_HID_SUPPORT is not set
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_INTF_SYSFS is not set
+# CONFIG_RTC_INTF_PROC is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
+CONFIG_FUSE_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=m
+CONFIG_TMPFS=y
+CONFIG_HUGETLBFS=y
+CONFIG_NFS_FS=m
+CONFIG_NFS_V3=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_FRAME_WARN=2048
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_DEBUG_SPINLOCK_SLEEP=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_VM=y
+# CONFIG_RCU_CPU_STALL_DETECTOR is not set
+CONFIG_DEBUG_STACKOVERFLOW=y
+CONFIG_DEBUG_EXTRA_FLAGS="-femit-struct-debug-baseonly"
diff --git a/arch/tile/include/arch/abi.h b/arch/tile/include/arch/abi.h
new file mode 100644
index 000000000000..8affc76f771a
--- /dev/null
+++ b/arch/tile/include/arch/abi.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file
+ *
+ * ABI-related register definitions helpful when writing assembly code.
+ */
+
+#ifndef __ARCH_ABI_H__
+#define __ARCH_ABI_H__
+
+#include <arch/chip.h>
+
+/* Registers 0 - 55 are "normal", but some perform special roles. */
+
+#define TREG_FP       52   /**< Frame pointer. */
+#define TREG_TP       53   /**< Thread pointer. */
+#define TREG_SP       54   /**< Stack pointer. */
+#define TREG_LR       55   /**< Link to calling function PC. */
+
+/** Index of last normal general-purpose register. */
+#define TREG_LAST_GPR 55
+
+/* Registers 56 - 62 are "special" network registers. */
+
+#define TREG_SN       56   /**< Static network access. */
+#define TREG_IDN0     57   /**< IDN demux 0 access. */
+#define TREG_IDN1     58   /**< IDN demux 1 access. */
+#define TREG_UDN0     59   /**< UDN demux 0 access. */
+#define TREG_UDN1     60   /**< UDN demux 1 access. */
+#define TREG_UDN2     61   /**< UDN demux 2 access. */
+#define TREG_UDN3     62   /**< UDN demux 3 access. */
+
+/* Register 63 is the "special" zero register. */
+
+#define TREG_ZERO     63   /**< "Zero" register; always reads as "0". */
+
+
+/** By convention, this register is used to hold the syscall number. */
+#define TREG_SYSCALL_NR      10
+
+/** Name of register that holds the syscall number, for use in assembly. */
+#define TREG_SYSCALL_NR_NAME r10
+
+
+/**
+ * The ABI requires callers to allocate a caller state save area of
+ * this many bytes at the bottom of each stack frame.
+ */
+#define C_ABI_SAVE_AREA_SIZE (2 * (CHIP_WORD_SIZE() / 8))
+
+/**
+ * The operand to an 'info' opcode directing the backtracer to not
+ * try to find the calling frame.
+ */
+#define INFO_OP_CANNOT_BACKTRACE 2
+
+#ifndef __ASSEMBLER__
+#if CHIP_WORD_SIZE() > 32
+
+/** Unsigned type that can hold a register. */
+typedef unsigned long long uint_reg_t;
+
+/** Signed type that can hold a register. */
+typedef long long int_reg_t;
+
+/** String prefix to use for printf(). */
+#define INT_REG_FMT "ll"
+
+#elif !defined(__LP64__)   /* avoid confusion with LP64 cross-build tools */
+
+/** Unsigned type that can hold a register. */
+typedef unsigned long uint_reg_t;
+
+/** Signed type that can hold a register. */
+typedef long int_reg_t;
+
+/** String prefix to use for printf(). */
+#define INT_REG_FMT "l"
+
+#endif
+#endif /* __ASSEMBLER__ */
+
+#endif /* !__ARCH_ABI_H__ */
diff --git a/arch/tile/include/arch/chip.h b/arch/tile/include/arch/chip.h
new file mode 100644
index 000000000000..926d3db0e91e
--- /dev/null
+++ b/arch/tile/include/arch/chip.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#if __tile_chip__ == 0
+#include <arch/chip_tile64.h>
+#elif __tile_chip__ == 1
+#include <arch/chip_tilepro.h>
+#elif defined(__tilegx__)
+#include <arch/chip_tilegx.h>
+#else
+#error Unexpected Tilera chip type
+#endif
diff --git a/arch/tile/include/arch/chip_tile64.h b/arch/tile/include/arch/chip_tile64.h
new file mode 100644
index 000000000000..1246573be59e
--- /dev/null
+++ b/arch/tile/include/arch/chip_tile64.h
@@ -0,0 +1,255 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/*
+ * @file
+ * Global header file.
+ * This header file specifies defines for TILE64.
+ */
+
+#ifndef __ARCH_CHIP_H__
+#define __ARCH_CHIP_H__
+
+/** Specify chip version.
+ * When possible, prefer the CHIP_xxx symbols below for future-proofing.
+ * This is intended for cross-compiling; native compilation should
+ * use the predefined __tile_chip__ symbol.
+ */
+#define TILE_CHIP 0
+
+/** Specify chip revision.
+ * This provides for the case of a respin of a particular chip type;
+ * the normal value for this symbol is "0".
+ * This is intended for cross-compiling; native compilation should
+ * use the predefined __tile_chip_rev__ symbol.
+ */
+#define TILE_CHIP_REV 0
+
+/** The name of this architecture. */
+#define CHIP_ARCH_NAME "tile64"
+
+/** The ELF e_machine type for binaries for this chip. */
+#define CHIP_ELF_TYPE() EM_TILE64
+
+/** The alternate ELF e_machine type for binaries for this chip. */
+#define CHIP_COMPAT_ELF_TYPE() 0x2506
+
+/** What is the native word size of the machine? */
+#define CHIP_WORD_SIZE() 32
+
+/** How many bits of a virtual address are used. Extra bits must be
+ * the sign extension of the low bits.
+ */
+#define CHIP_VA_WIDTH() 32
+
+/** How many bits are in a physical address? */
+#define CHIP_PA_WIDTH() 36
+
+/** Size of the L2 cache, in bytes. */
+#define CHIP_L2_CACHE_SIZE() 65536
+
+/** Log size of an L2 cache line in bytes. */
+#define CHIP_L2_LOG_LINE_SIZE() 6
+
+/** Size of an L2 cache line, in bytes. */
+#define CHIP_L2_LINE_SIZE() (1 << CHIP_L2_LOG_LINE_SIZE())
+
+/** Associativity of the L2 cache. */
+#define CHIP_L2_ASSOC() 2
+
+/** Size of the L1 data cache, in bytes. */
+#define CHIP_L1D_CACHE_SIZE() 8192
+
+/** Log size of an L1 data cache line in bytes. */
+#define CHIP_L1D_LOG_LINE_SIZE() 4
+
+/** Size of an L1 data cache line, in bytes. */
+#define CHIP_L1D_LINE_SIZE() (1 << CHIP_L1D_LOG_LINE_SIZE())
+
+/** Associativity of the L1 data cache. */
+#define CHIP_L1D_ASSOC() 2
+
+/** Size of the L1 instruction cache, in bytes. */
+#define CHIP_L1I_CACHE_SIZE() 8192
+
+/** Log size of an L1 instruction cache line in bytes. */
+#define CHIP_L1I_LOG_LINE_SIZE() 6
+
+/** Size of an L1 instruction cache line, in bytes. */
+#define CHIP_L1I_LINE_SIZE() (1 << CHIP_L1I_LOG_LINE_SIZE())
+
+/** Associativity of the L1 instruction cache. */
+#define CHIP_L1I_ASSOC() 1
+
+/** Stride with which flush instructions must be issued. */
+#define CHIP_FLUSH_STRIDE() CHIP_L2_LINE_SIZE()
+
+/** Stride with which inv instructions must be issued. */
+#define CHIP_INV_STRIDE() CHIP_L1D_LINE_SIZE()
+
+/** Stride with which finv instructions must be issued. */
+#define CHIP_FINV_STRIDE() CHIP_L1D_LINE_SIZE()
+
+/** Can the local cache coherently cache data that is homed elsewhere? */
+#define CHIP_HAS_COHERENT_LOCAL_CACHE() 0
+
+/** How many simultaneous outstanding victims can the L2 cache have? */
+#define CHIP_MAX_OUTSTANDING_VICTIMS() 2
+
+/** Does the TLB support the NC and NOALLOC bits? */
+#define CHIP_HAS_NC_AND_NOALLOC_BITS() 0
+
+/** Does the chip support hash-for-home caching? */
+#define CHIP_HAS_CBOX_HOME_MAP() 0
+
+/** Number of entries in the chip's home map tables. */
+/* #define CHIP_CBOX_HOME_MAP_SIZE() -- does not apply to chip 0 */
+
+/** Do uncacheable requests miss in the cache regardless of whether
+ * there is matching data? */
+#define CHIP_HAS_ENFORCED_UNCACHEABLE_REQUESTS() 0
+
+/** Does the mf instruction wait for victims? */
+#define CHIP_HAS_MF_WAITS_FOR_VICTIMS() 1
+
+/** Does the chip have an "inv" instruction that doesn't also flush? */
+#define CHIP_HAS_INV() 0
+
+/** Does the chip have a "wh64" instruction? */
+#define CHIP_HAS_WH64() 0
+
+/** Does this chip have a 'dword_align' instruction? */
+#define CHIP_HAS_DWORD_ALIGN() 0
+
+/** Number of performance counters. */
+#define CHIP_PERFORMANCE_COUNTERS() 2
+
+/** Does this chip have auxiliary performance counters? */
+#define CHIP_HAS_AUX_PERF_COUNTERS() 0
+
+/** Is the CBOX_MSR1 SPR supported? */
+#define CHIP_HAS_CBOX_MSR1() 0
+
+/** Is the TILE_RTF_HWM SPR supported? */
+#define CHIP_HAS_TILE_RTF_HWM() 0
+
+/** Is the TILE_WRITE_PENDING SPR supported? */
+#define CHIP_HAS_TILE_WRITE_PENDING() 0
+
+/** Is the PROC_STATUS SPR supported? */
+#define CHIP_HAS_PROC_STATUS_SPR() 0
+
+/** Log of the number of mshims we have. */
+#define CHIP_LOG_NUM_MSHIMS() 2
+
+/** Are the bases of the interrupt vector areas fixed? */
+#define CHIP_HAS_FIXED_INTVEC_BASE() 1
+
+/** Are the interrupt masks split up into 2 SPRs? */
+#define CHIP_HAS_SPLIT_INTR_MASK() 1
+
+/** Is the cycle count split up into 2 SPRs? */
+#define CHIP_HAS_SPLIT_CYCLE() 1
+
+/** Does the chip have a static network? */
+#define CHIP_HAS_SN() 1
+
+/** Does the chip have a static network processor? */
+#define CHIP_HAS_SN_PROC() 1
+
+/** Size of the L1 static network processor instruction cache, in bytes. */
+#define CHIP_L1SNI_CACHE_SIZE() 2048
+
+/** Does the chip have DMA support in each tile? */
+#define CHIP_HAS_TILE_DMA() 1
+
+/** Does the chip have the second revision of the directly accessible
+ *  dynamic networks?  This encapsulates a number of characteristics,
+ *  including the absence of the catch-all, the absence of inline message
+ *  tags, the absence of support for network context-switching, and so on.
+ */
+#define CHIP_HAS_REV1_XDN() 0
+
+/** Does the chip have cmpexch and similar (fetchadd, exch, etc.)? */
+#define CHIP_HAS_CMPEXCH() 0
+
+/** Does the chip have memory-mapped I/O support? */
+#define CHIP_HAS_MMIO() 0
+
+/** Does the chip have post-completion interrupts? */
+#define CHIP_HAS_POST_COMPLETION_INTERRUPTS() 0
+
+/** Does the chip have native single step support? */
+#define CHIP_HAS_SINGLE_STEP() 0
+
+#ifndef __OPEN_SOURCE__  /* features only relevant to hypervisor-level code */
+
+/** How many entries are present in the instruction TLB? */
+#define CHIP_ITLB_ENTRIES() 8
+
+/** How many entries are present in the data TLB? */
+#define CHIP_DTLB_ENTRIES() 16
+
+/** How many MAF entries does the XAUI shim have? */
+#define CHIP_XAUI_MAF_ENTRIES() 16
+
+/** Does the memory shim have a source-id table? */
+#define CHIP_HAS_MSHIM_SRCID_TABLE() 1
+
+/** Does the L1 instruction cache clear on reset? */
+#define CHIP_HAS_L1I_CLEAR_ON_RESET() 0
+
+/** Does the chip come out of reset with valid coordinates on all tiles?
+ * Note that if defined, this also implies that the upper left is 1,1.
+ */
+#define CHIP_HAS_VALID_TILE_COORD_RESET() 0
+
+/** Does the chip have unified packet formats? */
+#define CHIP_HAS_UNIFIED_PACKET_FORMATS() 0
+
+/** Does the chip support write reordering? */
+#define CHIP_HAS_WRITE_REORDERING() 0
+
+/** Does the chip support Y-X routing as well as X-Y? */
+#define CHIP_HAS_Y_X_ROUTING() 0
+
+/** Is INTCTRL_3 managed with the correct MPL? */
+#define CHIP_HAS_INTCTRL_3_STATUS_FIX() 0
+
+/** Is it possible to configure the chip to be big-endian? */
+#define CHIP_HAS_BIG_ENDIAN_CONFIG() 0
+
+/** Is the CACHE_RED_WAY_OVERRIDDEN SPR supported? */
+#define CHIP_HAS_CACHE_RED_WAY_OVERRIDDEN() 0
+
+/** Is the DIAG_TRACE_WAY SPR supported? */
+#define CHIP_HAS_DIAG_TRACE_WAY() 0
+
+/** Is the MEM_STRIPE_CONFIG SPR supported? */
+#define CHIP_HAS_MEM_STRIPE_CONFIG() 0
+
+/** Are the TLB_PERF SPRs supported? */
+#define CHIP_HAS_TLB_PERF() 0
+
+/** Is the VDN_SNOOP_SHIM_CTL SPR supported? */
+#define CHIP_HAS_VDN_SNOOP_SHIM_CTL() 0
+
+/** Does the chip support rev1 DMA packets? */
+#define CHIP_HAS_REV1_DMA_PACKETS() 0
+
+/** Does the chip have an IPI shim? */
+#define CHIP_HAS_IPI() 0
+
+#endif /* !__OPEN_SOURCE__ */
+#endif /* __ARCH_CHIP_H__ */
diff --git a/arch/tile/include/arch/chip_tilepro.h b/arch/tile/include/arch/chip_tilepro.h
new file mode 100644
index 000000000000..e864c47fc89c
--- /dev/null
+++ b/arch/tile/include/arch/chip_tilepro.h
@@ -0,0 +1,255 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/*
+ * @file
+ * Global header file.
+ * This header file specifies defines for TILEPro.
+ */
+
+#ifndef __ARCH_CHIP_H__
+#define __ARCH_CHIP_H__
+
+/** Specify chip version.
+ * When possible, prefer the CHIP_xxx symbols below for future-proofing.
+ * This is intended for cross-compiling; native compilation should
+ * use the predefined __tile_chip__ symbol.
+ */
+#define TILE_CHIP 1
+
+/** Specify chip revision.
+ * This provides for the case of a respin of a particular chip type;
+ * the normal value for this symbol is "0".
+ * This is intended for cross-compiling; native compilation should
+ * use the predefined __tile_chip_rev__ symbol.
+ */
+#define TILE_CHIP_REV 0
+
+/** The name of this architecture. */
+#define CHIP_ARCH_NAME "tilepro"
+
+/** The ELF e_machine type for binaries for this chip. */
+#define CHIP_ELF_TYPE() EM_TILEPRO
+
+/** The alternate ELF e_machine type for binaries for this chip. */
+#define CHIP_COMPAT_ELF_TYPE() 0x2507
+
+/** What is the native word size of the machine? */
+#define CHIP_WORD_SIZE() 32
+
+/** How many bits of a virtual address are used. Extra bits must be
+ * the sign extension of the low bits.
+ */
+#define CHIP_VA_WIDTH() 32
+
+/** How many bits are in a physical address? */
+#define CHIP_PA_WIDTH() 36
+
+/** Size of the L2 cache, in bytes. */
+#define CHIP_L2_CACHE_SIZE() 65536
+
+/** Log size of an L2 cache line in bytes. */
+#define CHIP_L2_LOG_LINE_SIZE() 6
+
+/** Size of an L2 cache line, in bytes. */
+#define CHIP_L2_LINE_SIZE() (1 << CHIP_L2_LOG_LINE_SIZE())
+
+/** Associativity of the L2 cache. */
+#define CHIP_L2_ASSOC() 4
+
+/** Size of the L1 data cache, in bytes. */
+#define CHIP_L1D_CACHE_SIZE() 8192
+
+/** Log size of an L1 data cache line in bytes. */
+#define CHIP_L1D_LOG_LINE_SIZE() 4
+
+/** Size of an L1 data cache line, in bytes. */
+#define CHIP_L1D_LINE_SIZE() (1 << CHIP_L1D_LOG_LINE_SIZE())
+
+/** Associativity of the L1 data cache. */
+#define CHIP_L1D_ASSOC() 2
+
+/** Size of the L1 instruction cache, in bytes. */
+#define CHIP_L1I_CACHE_SIZE() 16384
+
+/** Log size of an L1 instruction cache line in bytes. */
+#define CHIP_L1I_LOG_LINE_SIZE() 6
+
+/** Size of an L1 instruction cache line, in bytes. */
+#define CHIP_L1I_LINE_SIZE() (1 << CHIP_L1I_LOG_LINE_SIZE())
+
+/** Associativity of the L1 instruction cache. */
+#define CHIP_L1I_ASSOC() 1
+
+/** Stride with which flush instructions must be issued. */
+#define CHIP_FLUSH_STRIDE() CHIP_L2_LINE_SIZE()
+
+/** Stride with which inv instructions must be issued. */
+#define CHIP_INV_STRIDE() CHIP_L2_LINE_SIZE()
+
+/** Stride with which finv instructions must be issued. */
+#define CHIP_FINV_STRIDE() CHIP_L2_LINE_SIZE()
+
+/** Can the local cache coherently cache data that is homed elsewhere? */
+#define CHIP_HAS_COHERENT_LOCAL_CACHE() 1
+
+/** How many simultaneous outstanding victims can the L2 cache have? */
+#define CHIP_MAX_OUTSTANDING_VICTIMS() 4
+
+/** Does the TLB support the NC and NOALLOC bits? */
+#define CHIP_HAS_NC_AND_NOALLOC_BITS() 1
+
+/** Does the chip support hash-for-home caching? */
+#define CHIP_HAS_CBOX_HOME_MAP() 1
+
+/** Number of entries in the chip's home map tables. */
+#define CHIP_CBOX_HOME_MAP_SIZE() 64
+
+/** Do uncacheable requests miss in the cache regardless of whether
+ * there is matching data? */
+#define CHIP_HAS_ENFORCED_UNCACHEABLE_REQUESTS() 1
+
+/** Does the mf instruction wait for victims? */
+#define CHIP_HAS_MF_WAITS_FOR_VICTIMS() 0
+
+/** Does the chip have an "inv" instruction that doesn't also flush? */
+#define CHIP_HAS_INV() 1
+
+/** Does the chip have a "wh64" instruction? */
+#define CHIP_HAS_WH64() 1
+
+/** Does this chip have a 'dword_align' instruction? */
+#define CHIP_HAS_DWORD_ALIGN() 1
+
+/** Number of performance counters. */
+#define CHIP_PERFORMANCE_COUNTERS() 4
+
+/** Does this chip have auxiliary performance counters? */
+#define CHIP_HAS_AUX_PERF_COUNTERS() 1
+
+/** Is the CBOX_MSR1 SPR supported? */
+#define CHIP_HAS_CBOX_MSR1() 1
+
+/** Is the TILE_RTF_HWM SPR supported? */
+#define CHIP_HAS_TILE_RTF_HWM() 1
+
+/** Is the TILE_WRITE_PENDING SPR supported? */
+#define CHIP_HAS_TILE_WRITE_PENDING() 1
+
+/** Is the PROC_STATUS SPR supported? */
+#define CHIP_HAS_PROC_STATUS_SPR() 1
+
+/** Log of the number of mshims we have. */
+#define CHIP_LOG_NUM_MSHIMS() 2
+
+/** Are the bases of the interrupt vector areas fixed? */
+#define CHIP_HAS_FIXED_INTVEC_BASE() 1
+
+/** Are the interrupt masks split up into 2 SPRs? */
+#define CHIP_HAS_SPLIT_INTR_MASK() 1
+
+/** Is the cycle count split up into 2 SPRs? */
+#define CHIP_HAS_SPLIT_CYCLE() 1
+
+/** Does the chip have a static network? */
+#define CHIP_HAS_SN() 1
+
+/** Does the chip have a static network processor? */
+#define CHIP_HAS_SN_PROC() 0
+
+/** Size of the L1 static network processor instruction cache, in bytes. */
+/* #define CHIP_L1SNI_CACHE_SIZE() -- does not apply to chip 1 */
+
+/** Does the chip have DMA support in each tile? */
+#define CHIP_HAS_TILE_DMA() 1
+
+/** Does the chip have the second revision of the directly accessible
+ *  dynamic networks?  This encapsulates a number of characteristics,
+ *  including the absence of the catch-all, the absence of inline message
+ *  tags, the absence of support for network context-switching, and so on.
+ */
+#define CHIP_HAS_REV1_XDN() 0
+
+/** Does the chip have cmpexch and similar (fetchadd, exch, etc.)? */
+#define CHIP_HAS_CMPEXCH() 0
+
+/** Does the chip have memory-mapped I/O support? */
+#define CHIP_HAS_MMIO() 0
+
+/** Does the chip have post-completion interrupts? */
+#define CHIP_HAS_POST_COMPLETION_INTERRUPTS() 0
+
+/** Does the chip have native single step support? */
+#define CHIP_HAS_SINGLE_STEP() 0
+
+#ifndef __OPEN_SOURCE__  /* features only relevant to hypervisor-level code */
+
+/** How many entries are present in the instruction TLB? */
+#define CHIP_ITLB_ENTRIES() 16
+
+/** How many entries are present in the data TLB? */
+#define CHIP_DTLB_ENTRIES() 16
+
+/** How many MAF entries does the XAUI shim have? */
+#define CHIP_XAUI_MAF_ENTRIES() 32
+
+/** Does the memory shim have a source-id table? */
+#define CHIP_HAS_MSHIM_SRCID_TABLE() 0
+
+/** Does the L1 instruction cache clear on reset? */
+#define CHIP_HAS_L1I_CLEAR_ON_RESET() 1
+
+/** Does the chip come out of reset with valid coordinates on all tiles?
+ * Note that if defined, this also implies that the upper left is 1,1.
+ */
+#define CHIP_HAS_VALID_TILE_COORD_RESET() 1
+
+/** Does the chip have unified packet formats? */
+#define CHIP_HAS_UNIFIED_PACKET_FORMATS() 1
+
+/** Does the chip support write reordering? */
+#define CHIP_HAS_WRITE_REORDERING() 1
+
+/** Does the chip support Y-X routing as well as X-Y? */
+#define CHIP_HAS_Y_X_ROUTING() 1
+
+/** Is INTCTRL_3 managed with the correct MPL? */
+#define CHIP_HAS_INTCTRL_3_STATUS_FIX() 1
+
+/** Is it possible to configure the chip to be big-endian? */
+#define CHIP_HAS_BIG_ENDIAN_CONFIG() 1
+
+/** Is the CACHE_RED_WAY_OVERRIDDEN SPR supported? */
+#define CHIP_HAS_CACHE_RED_WAY_OVERRIDDEN() 1
+
+/** Is the DIAG_TRACE_WAY SPR supported? */
+#define CHIP_HAS_DIAG_TRACE_WAY() 1
+
+/** Is the MEM_STRIPE_CONFIG SPR supported? */
+#define CHIP_HAS_MEM_STRIPE_CONFIG() 1
+
+/** Are the TLB_PERF SPRs supported? */
+#define CHIP_HAS_TLB_PERF() 1
+
+/** Is the VDN_SNOOP_SHIM_CTL SPR supported? */
+#define CHIP_HAS_VDN_SNOOP_SHIM_CTL() 1
+
+/** Does the chip support rev1 DMA packets? */
+#define CHIP_HAS_REV1_DMA_PACKETS() 1
+
+/** Does the chip have an IPI shim? */
+#define CHIP_HAS_IPI() 0
+
+#endif /* !__OPEN_SOURCE__ */
+#endif /* __ARCH_CHIP_H__ */
diff --git a/arch/tile/include/arch/icache.h b/arch/tile/include/arch/icache.h
new file mode 100644
index 000000000000..5c87c9016338
--- /dev/null
+++ b/arch/tile/include/arch/icache.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ */
+
+/**
+ * @file
+ *
+ * Support for invalidating bytes in the instruction
+ */
+
+#ifndef __ARCH_ICACHE_H__
+#define __ARCH_ICACHE_H__
+
+#include <arch/chip.h>
+
+
+/**
+ * Invalidate the instruction cache for the given range of memory.
+ *
+ * @param addr The start of memory to be invalidated.
+ * @param size The number of bytes to be invalidated.
+ * @param page_size The system's page size, typically the PAGE_SIZE constant
+ * in sys/page.h.  This value must be a power of two no larger
+ * than the page containing the code to be invalidated. If the value
+ * is smaller than the actual page size, this function will still
+ * work, but may run slower than necessary.
+ */
+static __inline void
+invalidate_icache(const void* addr, unsigned long size,
+                  unsigned long page_size)
+{
+  const unsigned long cache_way_size =
+    CHIP_L1I_CACHE_SIZE() / CHIP_L1I_ASSOC();
+  unsigned long max_useful_size;
+  const char* start, *end;
+  long num_passes;
+
+  if (__builtin_expect(size == 0, 0))
+    return;
+
+#ifdef __tilegx__
+  /* Limit the number of bytes visited to avoid redundant iterations. */
+  max_useful_size = (page_size < cache_way_size) ? page_size : cache_way_size;
+
+  /* No PA aliasing is possible, so one pass always suffices. */
+  num_passes = 1;
+#else
+  /* Limit the number of bytes visited to avoid redundant iterations. */
+  max_useful_size = cache_way_size;
+
+  /*
+   * Compute how many passes we need (we'll treat 0 as if it were 1).
+   * This works because we know the page size is a power of two.
+   */
+  num_passes = cache_way_size >> __builtin_ctzl(page_size);
+#endif
+
+  if (__builtin_expect(size > max_useful_size, 0))
+    size = max_useful_size;
+
+  /* Locate the first and last bytes to be invalidated. */
+  start = (const char *)((unsigned long)addr & -CHIP_L1I_LINE_SIZE());
+  end = (const char*)addr + size - 1;
+
+  __insn_mf();
+
+  do
+  {
+    const char* p;
+
+    for (p = start; p <= end; p += CHIP_L1I_LINE_SIZE())
+      __insn_icoh(p);
+
+    start += page_size;
+    end += page_size;
+  }
+  while (--num_passes > 0);
+
+  __insn_drain();
+}
+
+
+#endif /* __ARCH_ICACHE_H__ */
diff --git a/arch/tile/include/arch/interrupts.h b/arch/tile/include/arch/interrupts.h
new file mode 100644
index 000000000000..20f8f07d2de9
--- /dev/null
+++ b/arch/tile/include/arch/interrupts.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifdef __tilegx__
+#include <arch/interrupts_64.h>
+#else
+#include <arch/interrupts_32.h>
+#endif
diff --git a/arch/tile/include/arch/interrupts_32.h b/arch/tile/include/arch/interrupts_32.h
new file mode 100644
index 000000000000..9d0bfa7e59be
--- /dev/null
+++ b/arch/tile/include/arch/interrupts_32.h
@@ -0,0 +1,304 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef __ARCH_INTERRUPTS_H__
+#define __ARCH_INTERRUPTS_H__
+
+/** Mask for an interrupt. */
+#ifdef __ASSEMBLER__
+/* Note: must handle breaking interrupts into high and low words manually. */
+#define INT_MASK(intno) (1 << (intno))
+#else
+#define INT_MASK(intno) (1ULL << (intno))
+#endif
+
+
+/** Where a given interrupt executes */
+#define INTERRUPT_VECTOR(i, pl) (0xFC000000 + ((pl) << 24) + ((i) << 8))
+
+/** Where to store a vector for a given interrupt. */
+#define USER_INTERRUPT_VECTOR(i) INTERRUPT_VECTOR(i, 0)
+
+/** The base address of user-level interrupts. */
+#define USER_INTERRUPT_VECTOR_BASE INTERRUPT_VECTOR(0, 0)
+
+
+/** Additional synthetic interrupt. */
+#define INT_BREAKPOINT (63)
+
+#define INT_ITLB_MISS    0
+#define INT_MEM_ERROR    1
+#define INT_ILL    2
+#define INT_GPV    3
+#define INT_SN_ACCESS    4
+#define INT_IDN_ACCESS    5
+#define INT_UDN_ACCESS    6
+#define INT_IDN_REFILL    7
+#define INT_UDN_REFILL    8
+#define INT_IDN_COMPLETE    9
+#define INT_UDN_COMPLETE   10
+#define INT_SWINT_3   11
+#define INT_SWINT_2   12
+#define INT_SWINT_1   13
+#define INT_SWINT_0   14
+#define INT_UNALIGN_DATA   15
+#define INT_DTLB_MISS   16
+#define INT_DTLB_ACCESS   17
+#define INT_DMATLB_MISS   18
+#define INT_DMATLB_ACCESS   19
+#define INT_SNITLB_MISS   20
+#define INT_SN_NOTIFY   21
+#define INT_SN_FIREWALL   22
+#define INT_IDN_FIREWALL   23
+#define INT_UDN_FIREWALL   24
+#define INT_TILE_TIMER   25
+#define INT_IDN_TIMER   26
+#define INT_UDN_TIMER   27
+#define INT_DMA_NOTIFY   28
+#define INT_IDN_CA   29
+#define INT_UDN_CA   30
+#define INT_IDN_AVAIL   31
+#define INT_UDN_AVAIL   32
+#define INT_PERF_COUNT   33
+#define INT_INTCTRL_3   34
+#define INT_INTCTRL_2   35
+#define INT_INTCTRL_1   36
+#define INT_INTCTRL_0   37
+#define INT_BOOT_ACCESS   38
+#define INT_WORLD_ACCESS   39
+#define INT_I_ASID   40
+#define INT_D_ASID   41
+#define INT_DMA_ASID   42
+#define INT_SNI_ASID   43
+#define INT_DMA_CPL   44
+#define INT_SN_CPL   45
+#define INT_DOUBLE_FAULT   46
+#define INT_SN_STATIC_ACCESS   47
+#define INT_AUX_PERF_COUNT   48
+
+#define NUM_INTERRUPTS 49
+
+#define QUEUED_INTERRUPTS ( \
+    INT_MASK(INT_MEM_ERROR) | \
+    INT_MASK(INT_DMATLB_MISS) | \
+    INT_MASK(INT_DMATLB_ACCESS) | \
+    INT_MASK(INT_SNITLB_MISS) | \
+    INT_MASK(INT_SN_NOTIFY) | \
+    INT_MASK(INT_SN_FIREWALL) | \
+    INT_MASK(INT_IDN_FIREWALL) | \
+    INT_MASK(INT_UDN_FIREWALL) | \
+    INT_MASK(INT_TILE_TIMER) | \
+    INT_MASK(INT_IDN_TIMER) | \
+    INT_MASK(INT_UDN_TIMER) | \
+    INT_MASK(INT_DMA_NOTIFY) | \
+    INT_MASK(INT_IDN_CA) | \
+    INT_MASK(INT_UDN_CA) | \
+    INT_MASK(INT_IDN_AVAIL) | \
+    INT_MASK(INT_UDN_AVAIL) | \
+    INT_MASK(INT_PERF_COUNT) | \
+    INT_MASK(INT_INTCTRL_3) | \
+    INT_MASK(INT_INTCTRL_2) | \
+    INT_MASK(INT_INTCTRL_1) | \
+    INT_MASK(INT_INTCTRL_0) | \
+    INT_MASK(INT_BOOT_ACCESS) | \
+    INT_MASK(INT_WORLD_ACCESS) | \
+    INT_MASK(INT_I_ASID) | \
+    INT_MASK(INT_D_ASID) | \
+    INT_MASK(INT_DMA_ASID) | \
+    INT_MASK(INT_SNI_ASID) | \
+    INT_MASK(INT_DMA_CPL) | \
+    INT_MASK(INT_SN_CPL) | \
+    INT_MASK(INT_DOUBLE_FAULT) | \
+    INT_MASK(INT_AUX_PERF_COUNT) | \
+    0)
+#define NONQUEUED_INTERRUPTS ( \
+    INT_MASK(INT_ITLB_MISS) | \
+    INT_MASK(INT_ILL) | \
+    INT_MASK(INT_GPV) | \
+    INT_MASK(INT_SN_ACCESS) | \
+    INT_MASK(INT_IDN_ACCESS) | \
+    INT_MASK(INT_UDN_ACCESS) | \
+    INT_MASK(INT_IDN_REFILL) | \
+    INT_MASK(INT_UDN_REFILL) | \
+    INT_MASK(INT_IDN_COMPLETE) | \
+    INT_MASK(INT_UDN_COMPLETE) | \
+    INT_MASK(INT_SWINT_3) | \
+    INT_MASK(INT_SWINT_2) | \
+    INT_MASK(INT_SWINT_1) | \
+    INT_MASK(INT_SWINT_0) | \
+    INT_MASK(INT_UNALIGN_DATA) | \
+    INT_MASK(INT_DTLB_MISS) | \
+    INT_MASK(INT_DTLB_ACCESS) | \
+    INT_MASK(INT_SN_STATIC_ACCESS) | \
+    0)
+#define CRITICAL_MASKED_INTERRUPTS ( \
+    INT_MASK(INT_MEM_ERROR) | \
+    INT_MASK(INT_DMATLB_MISS) | \
+    INT_MASK(INT_DMATLB_ACCESS) | \
+    INT_MASK(INT_SNITLB_MISS) | \
+    INT_MASK(INT_SN_NOTIFY) | \
+    INT_MASK(INT_SN_FIREWALL) | \
+    INT_MASK(INT_IDN_FIREWALL) | \
+    INT_MASK(INT_UDN_FIREWALL) | \
+    INT_MASK(INT_TILE_TIMER) | \
+    INT_MASK(INT_IDN_TIMER) | \
+    INT_MASK(INT_UDN_TIMER) | \
+    INT_MASK(INT_DMA_NOTIFY) | \
+    INT_MASK(INT_IDN_CA) | \
+    INT_MASK(INT_UDN_CA) | \
+    INT_MASK(INT_IDN_AVAIL) | \
+    INT_MASK(INT_UDN_AVAIL) | \
+    INT_MASK(INT_PERF_COUNT) | \
+    INT_MASK(INT_INTCTRL_3) | \
+    INT_MASK(INT_INTCTRL_2) | \
+    INT_MASK(INT_INTCTRL_1) | \
+    INT_MASK(INT_INTCTRL_0) | \
+    INT_MASK(INT_AUX_PERF_COUNT) | \
+    0)
+#define CRITICAL_UNMASKED_INTERRUPTS ( \
+    INT_MASK(INT_ITLB_MISS) | \
+    INT_MASK(INT_ILL) | \
+    INT_MASK(INT_GPV) | \
+    INT_MASK(INT_SN_ACCESS) | \
+    INT_MASK(INT_IDN_ACCESS) | \
+    INT_MASK(INT_UDN_ACCESS) | \
+    INT_MASK(INT_IDN_REFILL) | \
+    INT_MASK(INT_UDN_REFILL) | \
+    INT_MASK(INT_IDN_COMPLETE) | \
+    INT_MASK(INT_UDN_COMPLETE) | \
+    INT_MASK(INT_SWINT_3) | \
+    INT_MASK(INT_SWINT_2) | \
+    INT_MASK(INT_SWINT_1) | \
+    INT_MASK(INT_SWINT_0) | \
+    INT_MASK(INT_UNALIGN_DATA) | \
+    INT_MASK(INT_DTLB_MISS) | \
+    INT_MASK(INT_DTLB_ACCESS) | \
+    INT_MASK(INT_BOOT_ACCESS) | \
+    INT_MASK(INT_WORLD_ACCESS) | \
+    INT_MASK(INT_I_ASID) | \
+    INT_MASK(INT_D_ASID) | \
+    INT_MASK(INT_DMA_ASID) | \
+    INT_MASK(INT_SNI_ASID) | \
+    INT_MASK(INT_DMA_CPL) | \
+    INT_MASK(INT_SN_CPL) | \
+    INT_MASK(INT_DOUBLE_FAULT) | \
+    INT_MASK(INT_SN_STATIC_ACCESS) | \
+    0)
+#define MASKABLE_INTERRUPTS ( \
+    INT_MASK(INT_MEM_ERROR) | \
+    INT_MASK(INT_IDN_REFILL) | \
+    INT_MASK(INT_UDN_REFILL) | \
+    INT_MASK(INT_IDN_COMPLETE) | \
+    INT_MASK(INT_UDN_COMPLETE) | \
+    INT_MASK(INT_DMATLB_MISS) | \
+    INT_MASK(INT_DMATLB_ACCESS) | \
+    INT_MASK(INT_SNITLB_MISS) | \
+    INT_MASK(INT_SN_NOTIFY) | \
+    INT_MASK(INT_SN_FIREWALL) | \
+    INT_MASK(INT_IDN_FIREWALL) | \
+    INT_MASK(INT_UDN_FIREWALL) | \
+    INT_MASK(INT_TILE_TIMER) | \
+    INT_MASK(INT_IDN_TIMER) | \
+    INT_MASK(INT_UDN_TIMER) | \
+    INT_MASK(INT_DMA_NOTIFY) | \
+    INT_MASK(INT_IDN_CA) | \
+    INT_MASK(INT_UDN_CA) | \
+    INT_MASK(INT_IDN_AVAIL) | \
+    INT_MASK(INT_UDN_AVAIL) | \
+    INT_MASK(INT_PERF_COUNT) | \
+    INT_MASK(INT_INTCTRL_3) | \
+    INT_MASK(INT_INTCTRL_2) | \
+    INT_MASK(INT_INTCTRL_1) | \
+    INT_MASK(INT_INTCTRL_0) | \
+    INT_MASK(INT_AUX_PERF_COUNT) | \
+    0)
+#define UNMASKABLE_INTERRUPTS ( \
+    INT_MASK(INT_ITLB_MISS) | \
+    INT_MASK(INT_ILL) | \
+    INT_MASK(INT_GPV) | \
+    INT_MASK(INT_SN_ACCESS) | \
+    INT_MASK(INT_IDN_ACCESS) | \
+    INT_MASK(INT_UDN_ACCESS) | \
+    INT_MASK(INT_SWINT_3) | \
+    INT_MASK(INT_SWINT_2) | \
+    INT_MASK(INT_SWINT_1) | \
+    INT_MASK(INT_SWINT_0) | \
+    INT_MASK(INT_UNALIGN_DATA) | \
+    INT_MASK(INT_DTLB_MISS) | \
+    INT_MASK(INT_DTLB_ACCESS) | \
+    INT_MASK(INT_BOOT_ACCESS) | \
+    INT_MASK(INT_WORLD_ACCESS) | \
+    INT_MASK(INT_I_ASID) | \
+    INT_MASK(INT_D_ASID) | \
+    INT_MASK(INT_DMA_ASID) | \
+    INT_MASK(INT_SNI_ASID) | \
+    INT_MASK(INT_DMA_CPL) | \
+    INT_MASK(INT_SN_CPL) | \
+    INT_MASK(INT_DOUBLE_FAULT) | \
+    INT_MASK(INT_SN_STATIC_ACCESS) | \
+    0)
+#define SYNC_INTERRUPTS ( \
+    INT_MASK(INT_ITLB_MISS) | \
+    INT_MASK(INT_ILL) | \
+    INT_MASK(INT_GPV) | \
+    INT_MASK(INT_SN_ACCESS) | \
+    INT_MASK(INT_IDN_ACCESS) | \
+    INT_MASK(INT_UDN_ACCESS) | \
+    INT_MASK(INT_IDN_REFILL) | \
+    INT_MASK(INT_UDN_REFILL) | \
+    INT_MASK(INT_IDN_COMPLETE) | \
+    INT_MASK(INT_UDN_COMPLETE) | \
+    INT_MASK(INT_SWINT_3) | \
+    INT_MASK(INT_SWINT_2) | \
+    INT_MASK(INT_SWINT_1) | \
+    INT_MASK(INT_SWINT_0) | \
+    INT_MASK(INT_UNALIGN_DATA) | \
+    INT_MASK(INT_DTLB_MISS) | \
+    INT_MASK(INT_DTLB_ACCESS) | \
+    INT_MASK(INT_SN_STATIC_ACCESS) | \
+    0)
+#define NON_SYNC_INTERRUPTS ( \
+    INT_MASK(INT_MEM_ERROR) | \
+    INT_MASK(INT_DMATLB_MISS) | \
+    INT_MASK(INT_DMATLB_ACCESS) | \
+    INT_MASK(INT_SNITLB_MISS) | \
+    INT_MASK(INT_SN_NOTIFY) | \
+    INT_MASK(INT_SN_FIREWALL) | \
+    INT_MASK(INT_IDN_FIREWALL) | \
+    INT_MASK(INT_UDN_FIREWALL) | \
+    INT_MASK(INT_TILE_TIMER) | \
+    INT_MASK(INT_IDN_TIMER) | \
+    INT_MASK(INT_UDN_TIMER) | \
+    INT_MASK(INT_DMA_NOTIFY) | \
+    INT_MASK(INT_IDN_CA) | \
+    INT_MASK(INT_UDN_CA) | \
+    INT_MASK(INT_IDN_AVAIL) | \
+    INT_MASK(INT_UDN_AVAIL) | \
+    INT_MASK(INT_PERF_COUNT) | \
+    INT_MASK(INT_INTCTRL_3) | \
+    INT_MASK(INT_INTCTRL_2) | \
+    INT_MASK(INT_INTCTRL_1) | \
+    INT_MASK(INT_INTCTRL_0) | \
+    INT_MASK(INT_BOOT_ACCESS) | \
+    INT_MASK(INT_WORLD_ACCESS) | \
+    INT_MASK(INT_I_ASID) | \
+    INT_MASK(INT_D_ASID) | \
+    INT_MASK(INT_DMA_ASID) | \
+    INT_MASK(INT_SNI_ASID) | \
+    INT_MASK(INT_DMA_CPL) | \
+    INT_MASK(INT_SN_CPL) | \
+    INT_MASK(INT_DOUBLE_FAULT) | \
+    INT_MASK(INT_AUX_PERF_COUNT) | \
+    0)
+#endif /* !__ARCH_INTERRUPTS_H__ */
diff --git a/arch/tile/include/arch/sim_def.h b/arch/tile/include/arch/sim_def.h
new file mode 100644
index 000000000000..6418fbde063e
--- /dev/null
+++ b/arch/tile/include/arch/sim_def.h
@@ -0,0 +1,512 @@
+// Copyright 2010 Tilera Corporation. All Rights Reserved.
+//
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the GNU General Public License
+//   as published by the Free Software Foundation, version 2.
+//
+//   This program is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+//   NON INFRINGEMENT.  See the GNU General Public License for
+//   more details.
+
+//! @file
+//!
+//! Some low-level simulator definitions.
+//!
+
+#ifndef __ARCH_SIM_DEF_H__
+#define __ARCH_SIM_DEF_H__
+
+
+//! Internal: the low bits of the SIM_CONTROL_* SPR values specify
+//! the operation to perform, and the remaining bits are
+//! an operation-specific parameter (often unused).
+//!
+#define _SIM_CONTROL_OPERATOR_BITS 8
+
+
+//== Values which can be written to SPR_SIM_CONTROL.
+
+//! If written to SPR_SIM_CONTROL, stops profiling.
+//!
+#define SIM_CONTROL_PROFILER_DISABLE 0
+
+//! If written to SPR_SIM_CONTROL, starts profiling.
+//!
+#define SIM_CONTROL_PROFILER_ENABLE 1
+
+//! If written to SPR_SIM_CONTROL, clears profiling counters.
+//!
+#define SIM_CONTROL_PROFILER_CLEAR 2
+
+//! If written to SPR_SIM_CONTROL, checkpoints the simulator.
+//!
+#define SIM_CONTROL_CHECKPOINT 3
+
+//! If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8),
+//! sets the tracing mask to the given mask. See "sim_set_tracing()".
+//!
+#define SIM_CONTROL_SET_TRACING 4
+
+//! If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8),
+//! dumps the requested items of machine state to the log.
+//!
+#define SIM_CONTROL_DUMP 5
+
+//! If written to SPR_SIM_CONTROL, clears chip-level profiling counters.
+//!
+#define SIM_CONTROL_PROFILER_CHIP_CLEAR 6
+
+//! If written to SPR_SIM_CONTROL, disables chip-level profiling.
+//!
+#define SIM_CONTROL_PROFILER_CHIP_DISABLE 7
+
+//! If written to SPR_SIM_CONTROL, enables chip-level profiling.
+//!
+#define SIM_CONTROL_PROFILER_CHIP_ENABLE 8
+
+//! If written to SPR_SIM_CONTROL, enables chip-level functional mode
+//!
+#define SIM_CONTROL_ENABLE_FUNCTIONAL 9
+
+//! If written to SPR_SIM_CONTROL, disables chip-level functional mode.
+//!
+#define SIM_CONTROL_DISABLE_FUNCTIONAL 10
+
+//! If written to SPR_SIM_CONTROL, enables chip-level functional mode.
+//! All tiles must perform this write for functional mode to be enabled.
+//! Ignored in naked boot mode unless --functional is specified.
+//! WARNING: Only the hypervisor startup code should use this!
+//!
+#define SIM_CONTROL_ENABLE_FUNCTIONAL_BARRIER 11
+
+//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8),
+//! writes a string directly to the simulator output.  Written to once for
+//! each character in the string, plus a final NUL.  Instead of NUL,
+//! you can also use "SIM_PUTC_FLUSH_STRING" or "SIM_PUTC_FLUSH_BINARY".
+//!
+// ISSUE: Document the meaning of "newline", and the handling of NUL.
+//
+#define SIM_CONTROL_PUTC 12
+
+//! If written to SPR_SIM_CONTROL, clears the --grind-coherence state for
+//! this core.  This is intended to be used before a loop that will
+//! invalidate the cache by loading new data and evicting all current data.
+//! Generally speaking, this API should only be used by system code.
+//!
+#define SIM_CONTROL_GRINDER_CLEAR 13
+
+//! If written to SPR_SIM_CONTROL, shuts down the simulator.
+//!
+#define SIM_CONTROL_SHUTDOWN 14
+
+//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8),
+//! indicates that a fork syscall just created the given process.
+//!
+#define SIM_CONTROL_OS_FORK 15
+
+//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8),
+//! indicates that an exit syscall was just executed by the given process.
+//!
+#define SIM_CONTROL_OS_EXIT 16
+
+//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8),
+//! indicates that the OS just switched to the given process.
+//!
+#define SIM_CONTROL_OS_SWITCH 17
+
+//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8),
+//! indicates that an exec syscall was just executed. Written to once for
+//! each character in the executable name, plus a final NUL.
+//!
+#define SIM_CONTROL_OS_EXEC 18
+
+//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8),
+//! indicates that an interpreter (PT_INTERP) was loaded.  Written to once
+//! for each character in "ADDR:PATH", plus a final NUL, where "ADDR" is a
+//! hex load address starting with "0x", and "PATH" is the executable name.
+//!
+#define SIM_CONTROL_OS_INTERP 19
+
+//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8),
+//! indicates that a dll was loaded.  Written to once for each character
+//! in "ADDR:PATH", plus a final NUL, where "ADDR" is a hexadecimal load
+//! address starting with "0x", and "PATH" is the executable name.
+//!
+#define SIM_CONTROL_DLOPEN 20
+
+//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8),
+//! indicates that a dll was unloaded.  Written to once for each character
+//! in "ADDR", plus a final NUL, where "ADDR" is a hexadecimal load
+//! address starting with "0x".
+//!
+#define SIM_CONTROL_DLCLOSE 21
+
+//! If written to SPR_SIM_CONTROL, combined with a flag (shifted by 8),
+//! indicates whether to allow data reads to remotely-cached
+//! dirty cache lines to be cached locally without grinder warnings or
+//! assertions (used by Linux kernel fast memcpy).
+//!
+#define SIM_CONTROL_ALLOW_MULTIPLE_CACHING 22
+
+//! If written to SPR_SIM_CONTROL, enables memory tracing.
+//!
+#define SIM_CONTROL_ENABLE_MEM_LOGGING 23
+
+//! If written to SPR_SIM_CONTROL, disables memory tracing.
+//!
+#define SIM_CONTROL_DISABLE_MEM_LOGGING 24
+
+//! If written to SPR_SIM_CONTROL, changes the shaping parameters of one of
+//! the gbe or xgbe shims. Must specify the shim id, the type, the units, and
+//! the rate, as defined in SIM_SHAPING_SPR_ARG.
+//!
+#define SIM_CONTROL_SHAPING 25
+
+//! If written to SPR_SIM_CONTROL, combined with character (shifted by 8),
+//! requests that a simulator command be executed.  Written to once for each
+//! character in the command, plus a final NUL.
+//!
+#define SIM_CONTROL_COMMAND 26
+
+//! If written to SPR_SIM_CONTROL, indicates that the simulated system
+//! is panicking, to allow debugging via --debug-on-panic.
+//!
+#define SIM_CONTROL_PANIC 27
+
+//! If written to SPR_SIM_CONTROL, triggers a simulator syscall.
+//! See "sim_syscall()" for more info.
+//!
+#define SIM_CONTROL_SYSCALL 32
+
+//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8),
+//! provides the pid that subsequent SIM_CONTROL_OS_FORK writes should
+//! use as the pid, rather than the default previous SIM_CONTROL_OS_SWITCH.
+//!
+#define SIM_CONTROL_OS_FORK_PARENT 33
+
+//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number
+//! (shifted by 8), clears the pending magic data section.  The cleared
+//! pending magic data section and any subsequently appended magic bytes
+//! will only take effect when the classifier blast programmer is run.
+#define SIM_CONTROL_CLEAR_MPIPE_MAGIC_BYTES 34
+
+//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number
+//! (shifted by 8) and a byte of data (shifted by 16), appends that byte
+//! to the shim's pending magic data section.  The pending magic data
+//! section takes effect when the classifier blast programmer is run.
+#define SIM_CONTROL_APPEND_MPIPE_MAGIC_BYTE 35
+
+//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number
+//! (shifted by 8), an enable=1/disable=0 bit (shifted by 16), and a
+//! mask of links (shifted by 32), enable or disable the corresponding
+//! mPIPE links.
+#define SIM_CONTROL_ENABLE_MPIPE_LINK_MAGIC_BYTE 36
+
+//== Syscall numbers for use with "sim_syscall()".
+
+//! Syscall number for sim_add_watchpoint().
+//!
+#define SIM_SYSCALL_ADD_WATCHPOINT 2
+
+//! Syscall number for sim_remove_watchpoint().
+//!
+#define SIM_SYSCALL_REMOVE_WATCHPOINT 3
+
+//! Syscall number for sim_query_watchpoint().
+//!
+#define SIM_SYSCALL_QUERY_WATCHPOINT 4
+
+//! Syscall number that asserts that the cache lines whose 64-bit PA
+//! is passed as the second argument to sim_syscall(), and over a
+//! range passed as the third argument, are no longer in cache.
+//! The simulator raises an error if this is not the case.
+//!
+#define SIM_SYSCALL_VALIDATE_LINES_EVICTED 5
+
+
+//== Bit masks which can be shifted by 8, combined with
+//== SIM_CONTROL_SET_TRACING, and written to SPR_SIM_CONTROL.
+
+//! @addtogroup arch_sim
+//! @{
+
+//! Enable --trace-cycle when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_CYCLES          0x01
+
+//! Enable --trace-router when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_ROUTER          0x02
+
+//! Enable --trace-register-writes when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_REGISTER_WRITES 0x04
+
+//! Enable --trace-disasm when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_DISASM          0x08
+
+//! Enable --trace-stall-info when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_STALL_INFO      0x10
+
+//! Enable --trace-memory-controller when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_MEMORY_CONTROLLER 0x20
+
+//! Enable --trace-l2 when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_L2_CACHE 0x40
+
+//! Enable --trace-lines when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_LINES 0x80
+
+//! Turn off all tracing when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_NONE 0
+
+//! Turn on all tracing when passed to simulator_set_tracing().
+//!
+#define SIM_TRACE_ALL (-1)
+
+//! @}
+
+//! Computes the value to write to SPR_SIM_CONTROL to set tracing flags.
+//!
+#define SIM_TRACE_SPR_ARG(mask) \
+  (SIM_CONTROL_SET_TRACING | ((mask) << _SIM_CONTROL_OPERATOR_BITS))
+
+
+//== Bit masks which can be shifted by 8, combined with
+//== SIM_CONTROL_DUMP, and written to SPR_SIM_CONTROL.
+
+//! @addtogroup arch_sim
+//! @{
+
+//! Dump the general-purpose registers.
+//!
+#define SIM_DUMP_REGS          0x001
+
+//! Dump the SPRs.
+//!
+#define SIM_DUMP_SPRS          0x002
+
+//! Dump the ITLB.
+//!
+#define SIM_DUMP_ITLB          0x004
+
+//! Dump the DTLB.
+//!
+#define SIM_DUMP_DTLB          0x008
+
+//! Dump the L1 I-cache.
+//!
+#define SIM_DUMP_L1I           0x010
+
+//! Dump the L1 D-cache.
+//!
+#define SIM_DUMP_L1D           0x020
+
+//! Dump the L2 cache.
+//!
+#define SIM_DUMP_L2            0x040
+
+//! Dump the switch registers.
+//!
+#define SIM_DUMP_SNREGS        0x080
+
+//! Dump the switch ITLB.
+//!
+#define SIM_DUMP_SNITLB        0x100
+
+//! Dump the switch L1 I-cache.
+//!
+#define SIM_DUMP_SNL1I         0x200
+
+//! Dump the current backtrace.
+//!
+#define SIM_DUMP_BACKTRACE     0x400
+
+//! Only dump valid lines in caches.
+//!
+#define SIM_DUMP_VALID_LINES   0x800
+
+//! Dump everything that is dumpable.
+//!
+#define SIM_DUMP_ALL (-1 & ~SIM_DUMP_VALID_LINES)
+
+// @}
+
+//! Computes the value to write to SPR_SIM_CONTROL to dump machine state.
+//!
+#define SIM_DUMP_SPR_ARG(mask) \
+  (SIM_CONTROL_DUMP | ((mask) << _SIM_CONTROL_OPERATOR_BITS))
+
+
+//== Bit masks which can be shifted by 8, combined with
+//== SIM_CONTROL_PROFILER_CHIP_xxx, and written to SPR_SIM_CONTROL.
+
+//! @addtogroup arch_sim
+//! @{
+
+//! Use with with SIM_PROFILER_CHIP_xxx to control the memory controllers.
+//!
+#define SIM_CHIP_MEMCTL        0x001
+
+//! Use with with SIM_PROFILER_CHIP_xxx to control the XAUI interface.
+//!
+#define SIM_CHIP_XAUI          0x002
+
+//! Use with with SIM_PROFILER_CHIP_xxx to control the PCIe interface.
+//!
+#define SIM_CHIP_PCIE          0x004
+
+//! Use with with SIM_PROFILER_CHIP_xxx to control the MPIPE interface.
+//!
+#define SIM_CHIP_MPIPE         0x008
+
+//! Reference all chip devices.
+//!
+#define SIM_CHIP_ALL (-1)
+
+//! @}
+
+//! Computes the value to write to SPR_SIM_CONTROL to clear chip statistics.
+//!
+#define SIM_PROFILER_CHIP_CLEAR_SPR_ARG(mask) \
+  (SIM_CONTROL_PROFILER_CHIP_CLEAR | ((mask) << _SIM_CONTROL_OPERATOR_BITS))
+
+//! Computes the value to write to SPR_SIM_CONTROL to disable chip statistics.
+//!
+#define SIM_PROFILER_CHIP_DISABLE_SPR_ARG(mask) \
+  (SIM_CONTROL_PROFILER_CHIP_DISABLE | ((mask) << _SIM_CONTROL_OPERATOR_BITS))
+
+//! Computes the value to write to SPR_SIM_CONTROL to enable chip statistics.
+//!
+#define SIM_PROFILER_CHIP_ENABLE_SPR_ARG(mask) \
+  (SIM_CONTROL_PROFILER_CHIP_ENABLE | ((mask) << _SIM_CONTROL_OPERATOR_BITS))
+
+
+
+// Shim bitrate controls.
+
+//! The number of bits used to store the shim id.
+//!
+#define SIM_CONTROL_SHAPING_SHIM_ID_BITS 3
+
+//! @addtogroup arch_sim
+//! @{
+
+//! Change the gbe 0 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_GBE_0 0x0
+
+//! Change the gbe 1 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_GBE_1 0x1
+
+//! Change the gbe 2 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_GBE_2 0x2
+
+//! Change the gbe 3 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_GBE_3 0x3
+
+//! Change the xgbe 0 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_XGBE_0 0x4
+
+//! Change the xgbe 1 bitrate.
+//!
+#define SIM_CONTROL_SHAPING_XGBE_1 0x5
+
+//! The type of shaping to do.
+//!
+#define SIM_CONTROL_SHAPING_TYPE_BITS 2
+
+//! Control the multiplier.
+//!
+#define SIM_CONTROL_SHAPING_MULTIPLIER 0
+
+//! Control the PPS.
+//!
+#define SIM_CONTROL_SHAPING_PPS 1
+
+//! Control the BPS.
+//!
+#define SIM_CONTROL_SHAPING_BPS 2
+
+//! The number of bits for the units for the shaping parameter.
+//!
+#define SIM_CONTROL_SHAPING_UNITS_BITS 2
+
+//! Provide a number in single units.
+//!
+#define SIM_CONTROL_SHAPING_UNITS_SINGLE 0
+
+//! Provide a number in kilo units.
+//!
+#define SIM_CONTROL_SHAPING_UNITS_KILO 1
+
+//! Provide a number in mega units.
+//!
+#define SIM_CONTROL_SHAPING_UNITS_MEGA 2
+
+//! Provide a number in giga units.
+//!
+#define SIM_CONTROL_SHAPING_UNITS_GIGA 3
+
+// @}
+
+//! How many bits are available for the rate.
+//!
+#define SIM_CONTROL_SHAPING_RATE_BITS \
+  (32 - (_SIM_CONTROL_OPERATOR_BITS + \
+         SIM_CONTROL_SHAPING_SHIM_ID_BITS + \
+         SIM_CONTROL_SHAPING_TYPE_BITS + \
+         SIM_CONTROL_SHAPING_UNITS_BITS))
+
+//! Computes the value to write to SPR_SIM_CONTROL to change a bitrate.
+//!
+#define SIM_SHAPING_SPR_ARG(shim, type, units, rate) \
+  (SIM_CONTROL_SHAPING | \
+   ((shim) | \
+   ((type) << (SIM_CONTROL_SHAPING_SHIM_ID_BITS)) | \
+   ((units) << (SIM_CONTROL_SHAPING_SHIM_ID_BITS + \
+                SIM_CONTROL_SHAPING_TYPE_BITS)) | \
+   ((rate) << (SIM_CONTROL_SHAPING_SHIM_ID_BITS + \
+               SIM_CONTROL_SHAPING_TYPE_BITS + \
+               SIM_CONTROL_SHAPING_UNITS_BITS))) << _SIM_CONTROL_OPERATOR_BITS)
+
+
+//== Values returned when reading SPR_SIM_CONTROL.
+// ISSUE: These names should share a longer common prefix.
+
+//! When reading SPR_SIM_CONTROL, the mask of simulator tracing bits
+//! (SIM_TRACE_xxx values).
+//!
+#define SIM_TRACE_FLAG_MASK 0xFFFF
+
+//! When reading SPR_SIM_CONTROL, the mask for whether profiling is enabled.
+//!
+#define SIM_PROFILER_ENABLED_MASK 0x10000
+
+
+//== Special arguments for "SIM_CONTROL_PUTC".
+
+//! Flag value for forcing a PUTC string-flush, including
+//! coordinate/cycle prefix and newline.
+//!
+#define SIM_PUTC_FLUSH_STRING 0x100
+
+//! Flag value for forcing a PUTC binary-data-flush, which skips the
+//! prefix and does not append a newline.
+//!
+#define SIM_PUTC_FLUSH_BINARY 0x101
+
+
+#endif //__ARCH_SIM_DEF_H__
diff --git a/arch/tile/include/arch/spr_def.h b/arch/tile/include/arch/spr_def.h
new file mode 100644
index 000000000000..c8fdbd9a45e6
--- /dev/null
+++ b/arch/tile/include/arch/spr_def.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifdef __tilegx__
+#include <arch/spr_def_64.h>
+#else
+#include <arch/spr_def_32.h>
+#endif
diff --git a/arch/tile/include/arch/spr_def_32.h b/arch/tile/include/arch/spr_def_32.h
new file mode 100644
index 000000000000..b4fc06864df6
--- /dev/null
+++ b/arch/tile/include/arch/spr_def_32.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef __DOXYGEN__
+
+#ifndef __ARCH_SPR_DEF_H__
+#define __ARCH_SPR_DEF_H__
+
+#define SPR_AUX_PERF_COUNT_0 0x6005
+#define SPR_AUX_PERF_COUNT_1 0x6006
+#define SPR_AUX_PERF_COUNT_CTL 0x6007
+#define SPR_AUX_PERF_COUNT_STS 0x6008
+#define SPR_CYCLE_HIGH 0x4e06
+#define SPR_CYCLE_LOW 0x4e07
+#define SPR_DMA_BYTE 0x3900
+#define SPR_DMA_CHUNK_SIZE 0x3901
+#define SPR_DMA_CTR 0x3902
+#define SPR_DMA_CTR__REQUEST_MASK  0x1
+#define SPR_DMA_CTR__SUSPEND_MASK  0x2
+#define SPR_DMA_DST_ADDR 0x3903
+#define SPR_DMA_DST_CHUNK_ADDR 0x3904
+#define SPR_DMA_SRC_ADDR 0x3905
+#define SPR_DMA_SRC_CHUNK_ADDR 0x3906
+#define SPR_DMA_STATUS__DONE_MASK  0x1
+#define SPR_DMA_STATUS__BUSY_MASK  0x2
+#define SPR_DMA_STATUS__RUNNING_MASK  0x10
+#define SPR_DMA_STRIDE 0x3907
+#define SPR_DMA_USER_STATUS 0x3908
+#define SPR_DONE 0x4e08
+#define SPR_EVENT_BEGIN 0x4e0d
+#define SPR_EVENT_END 0x4e0e
+#define SPR_EX_CONTEXT_0_0 0x4a05
+#define SPR_EX_CONTEXT_0_1 0x4a06
+#define SPR_EX_CONTEXT_0_1__PL_SHIFT 0
+#define SPR_EX_CONTEXT_0_1__PL_RMASK 0x3
+#define SPR_EX_CONTEXT_0_1__PL_MASK  0x3
+#define SPR_EX_CONTEXT_0_1__ICS_SHIFT 2
+#define SPR_EX_CONTEXT_0_1__ICS_RMASK 0x1
+#define SPR_EX_CONTEXT_0_1__ICS_MASK  0x4
+#define SPR_EX_CONTEXT_1_0 0x4805
+#define SPR_EX_CONTEXT_1_1 0x4806
+#define SPR_EX_CONTEXT_1_1__PL_SHIFT 0
+#define SPR_EX_CONTEXT_1_1__PL_RMASK 0x3
+#define SPR_EX_CONTEXT_1_1__PL_MASK  0x3
+#define SPR_EX_CONTEXT_1_1__ICS_SHIFT 2
+#define SPR_EX_CONTEXT_1_1__ICS_RMASK 0x1
+#define SPR_EX_CONTEXT_1_1__ICS_MASK  0x4
+#define SPR_FAIL 0x4e09
+#define SPR_INTCTRL_0_STATUS 0x4a07
+#define SPR_INTCTRL_1_STATUS 0x4807
+#define SPR_INTERRUPT_CRITICAL_SECTION 0x4e0a
+#define SPR_INTERRUPT_MASK_0_0 0x4a08
+#define SPR_INTERRUPT_MASK_0_1 0x4a09
+#define SPR_INTERRUPT_MASK_1_0 0x4809
+#define SPR_INTERRUPT_MASK_1_1 0x480a
+#define SPR_INTERRUPT_MASK_RESET_0_0 0x4a0a
+#define SPR_INTERRUPT_MASK_RESET_0_1 0x4a0b
+#define SPR_INTERRUPT_MASK_RESET_1_0 0x480b
+#define SPR_INTERRUPT_MASK_RESET_1_1 0x480c
+#define SPR_INTERRUPT_MASK_SET_0_0 0x4a0c
+#define SPR_INTERRUPT_MASK_SET_0_1 0x4a0d
+#define SPR_INTERRUPT_MASK_SET_1_0 0x480d
+#define SPR_INTERRUPT_MASK_SET_1_1 0x480e
+#define SPR_MPL_DMA_CPL_SET_0 0x5800
+#define SPR_MPL_DMA_CPL_SET_1 0x5801
+#define SPR_MPL_DMA_NOTIFY_SET_0 0x3800
+#define SPR_MPL_DMA_NOTIFY_SET_1 0x3801
+#define SPR_MPL_INTCTRL_0_SET_0 0x4a00
+#define SPR_MPL_INTCTRL_0_SET_1 0x4a01
+#define SPR_MPL_INTCTRL_1_SET_0 0x4800
+#define SPR_MPL_INTCTRL_1_SET_1 0x4801
+#define SPR_MPL_SN_ACCESS_SET_0 0x0800
+#define SPR_MPL_SN_ACCESS_SET_1 0x0801
+#define SPR_MPL_SN_CPL_SET_0 0x5a00
+#define SPR_MPL_SN_CPL_SET_1 0x5a01
+#define SPR_MPL_SN_FIREWALL_SET_0 0x2c00
+#define SPR_MPL_SN_FIREWALL_SET_1 0x2c01
+#define SPR_MPL_SN_NOTIFY_SET_0 0x2a00
+#define SPR_MPL_SN_NOTIFY_SET_1 0x2a01
+#define SPR_MPL_UDN_ACCESS_SET_0 0x0c00
+#define SPR_MPL_UDN_ACCESS_SET_1 0x0c01
+#define SPR_MPL_UDN_AVAIL_SET_0 0x4000
+#define SPR_MPL_UDN_AVAIL_SET_1 0x4001
+#define SPR_MPL_UDN_CA_SET_0 0x3c00
+#define SPR_MPL_UDN_CA_SET_1 0x3c01
+#define SPR_MPL_UDN_COMPLETE_SET_0 0x1400
+#define SPR_MPL_UDN_COMPLETE_SET_1 0x1401
+#define SPR_MPL_UDN_FIREWALL_SET_0 0x3000
+#define SPR_MPL_UDN_FIREWALL_SET_1 0x3001
+#define SPR_MPL_UDN_REFILL_SET_0 0x1000
+#define SPR_MPL_UDN_REFILL_SET_1 0x1001
+#define SPR_MPL_UDN_TIMER_SET_0 0x3600
+#define SPR_MPL_UDN_TIMER_SET_1 0x3601
+#define SPR_MPL_WORLD_ACCESS_SET_0 0x4e00
+#define SPR_MPL_WORLD_ACCESS_SET_1 0x4e01
+#define SPR_PASS 0x4e0b
+#define SPR_PERF_COUNT_0 0x4205
+#define SPR_PERF_COUNT_1 0x4206
+#define SPR_PERF_COUNT_CTL 0x4207
+#define SPR_PERF_COUNT_STS 0x4208
+#define SPR_PROC_STATUS 0x4f00
+#define SPR_SIM_CONTROL 0x4e0c
+#define SPR_SNCTL 0x0805
+#define SPR_SNCTL__FRZFABRIC_MASK  0x1
+#define SPR_SNCTL__FRZPROC_MASK  0x2
+#define SPR_SNPC 0x080b
+#define SPR_SNSTATIC 0x080c
+#define SPR_SYSTEM_SAVE_0_0 0x4b00
+#define SPR_SYSTEM_SAVE_0_1 0x4b01
+#define SPR_SYSTEM_SAVE_0_2 0x4b02
+#define SPR_SYSTEM_SAVE_0_3 0x4b03
+#define SPR_SYSTEM_SAVE_1_0 0x4900
+#define SPR_SYSTEM_SAVE_1_1 0x4901
+#define SPR_SYSTEM_SAVE_1_2 0x4902
+#define SPR_SYSTEM_SAVE_1_3 0x4903
+#define SPR_TILE_COORD 0x4c17
+#define SPR_TILE_RTF_HWM 0x4e10
+#define SPR_TILE_TIMER_CONTROL 0x3205
+#define SPR_TILE_WRITE_PENDING 0x4e0f
+#define SPR_UDN_AVAIL_EN 0x4005
+#define SPR_UDN_CA_DATA 0x0d00
+#define SPR_UDN_DATA_AVAIL 0x0d03
+#define SPR_UDN_DEADLOCK_TIMEOUT 0x3606
+#define SPR_UDN_DEMUX_CA_COUNT 0x0c05
+#define SPR_UDN_DEMUX_COUNT_0 0x0c06
+#define SPR_UDN_DEMUX_COUNT_1 0x0c07
+#define SPR_UDN_DEMUX_COUNT_2 0x0c08
+#define SPR_UDN_DEMUX_COUNT_3 0x0c09
+#define SPR_UDN_DEMUX_CTL 0x0c0a
+#define SPR_UDN_DEMUX_QUEUE_SEL 0x0c0c
+#define SPR_UDN_DEMUX_STATUS 0x0c0d
+#define SPR_UDN_DEMUX_WRITE_FIFO 0x0c0e
+#define SPR_UDN_DIRECTION_PROTECT 0x3005
+#define SPR_UDN_REFILL_EN 0x1005
+#define SPR_UDN_SP_FIFO_DATA 0x0c11
+#define SPR_UDN_SP_FIFO_SEL 0x0c12
+#define SPR_UDN_SP_FREEZE 0x0c13
+#define SPR_UDN_SP_FREEZE__SP_FRZ_MASK  0x1
+#define SPR_UDN_SP_FREEZE__DEMUX_FRZ_MASK  0x2
+#define SPR_UDN_SP_FREEZE__NON_DEST_EXT_MASK  0x4
+#define SPR_UDN_SP_STATE 0x0c14
+#define SPR_UDN_TAG_0 0x0c15
+#define SPR_UDN_TAG_1 0x0c16
+#define SPR_UDN_TAG_2 0x0c17
+#define SPR_UDN_TAG_3 0x0c18
+#define SPR_UDN_TAG_VALID 0x0c19
+#define SPR_UDN_TILE_COORD 0x0c1a
+
+#endif /* !defined(__ARCH_SPR_DEF_H__) */
+
+#endif /* !defined(__DOXYGEN__) */
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
new file mode 100644
index 000000000000..3b8f55b82dee
--- /dev/null
+++ b/arch/tile/include/asm/Kbuild
@@ -0,0 +1,3 @@
+include include/asm-generic/Kbuild.asm
+
+header-y += ucontext.h
diff --git a/arch/tile/include/asm/asm-offsets.h b/arch/tile/include/asm/asm-offsets.h
new file mode 100644
index 000000000000..d370ee36a182
--- /dev/null
+++ b/arch/tile/include/asm/asm-offsets.h
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff --git a/arch/tile/include/asm/atomic.h b/arch/tile/include/asm/atomic.h
new file mode 100644
index 000000000000..b8c49f98a44c
--- /dev/null
+++ b/arch/tile/include/asm/atomic.h
@@ -0,0 +1,159 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Atomic primitives.
+ */
+
+#ifndef _ASM_TILE_ATOMIC_H
+#define _ASM_TILE_ATOMIC_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/compiler.h>
+#include <asm/system.h>
+
+#define ATOMIC_INIT(i)  { (i) }
+
+/**
+ * atomic_read - read atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically reads the value of @v.
+ */
+static inline int atomic_read(const atomic_t *v)
+{
+       return v->counter;
+}
+
+/**
+ * atomic_sub_return - subtract integer and return
+ * @v: pointer of type atomic_t
+ * @i: integer value to subtract
+ *
+ * Atomically subtracts @i from @v and returns @v - @i
+ */
+#define atomic_sub_return(i, v)         atomic_add_return((int)(-(i)), (v))
+
+/**
+ * atomic_sub - subtract integer from atomic variable
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v.
+ */
+#define atomic_sub(i, v)                atomic_add((int)(-(i)), (v))
+
+/**
+ * atomic_sub_and_test - subtract value from variable and test result
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v and returns true if the result is
+ * zero, or false for all other cases.
+ */
+#define atomic_sub_and_test(i, v)       (atomic_sub_return((i), (v)) == 0)
+
+/**
+ * atomic_inc_return - increment memory and return
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1 and returns the new value.
+ */
+#define atomic_inc_return(v)            atomic_add_return(1, (v))
+
+/**
+ * atomic_dec_return - decrement memory and return
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrements @v by 1 and returns the new value.
+ */
+#define atomic_dec_return(v)            atomic_sub_return(1, (v))
+
+/**
+ * atomic_inc - increment atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1.
+ */
+#define atomic_inc(v)                   atomic_add(1, (v))
+
+/**
+ * atomic_dec - decrement atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrements @v by 1.
+ */
+#define atomic_dec(v)                   atomic_sub(1, (v))
+
+/**
+ * atomic_dec_and_test - decrement and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrements @v by 1 and returns true if the result is 0.
+ */
+#define atomic_dec_and_test(v)          (atomic_dec_return(v) == 0)
+
+/**
+ * atomic_inc_and_test - increment and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1 and returns true if the result is 0.
+ */
+#define atomic_inc_and_test(v)          (atomic_inc_return(v) == 0)
+
+/**
+ * atomic_add_negative - add and test if negative
+ * @v: pointer of type atomic_t
+ * @i: integer value to add
+ *
+ * Atomically adds @i to @v and returns true if the result is
+ * negative, or false when result is greater than or equal to zero.
+ */
+#define atomic_add_negative(i, v)       (atomic_add_return((i), (v)) < 0)
+
+/**
+ * atomic_inc_not_zero - increment unless the number is zero
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1, so long as @v is non-zero.
+ * Returns non-zero if @v was non-zero, and zero otherwise.
+ */
+#define atomic_inc_not_zero(v)          atomic_add_unless((v), 1, 0)
+
+
+/*
+ * We define xchg() and cmpxchg() in the included headers.
+ * Note that we do not define __HAVE_ARCH_CMPXCHG, since that would imply
+ * that cmpxchg() is an efficient operation, which is not particularly true.
+ */
+
+/* Nonexistent functions intended to cause link errors. */
+extern unsigned long __xchg_called_with_bad_pointer(void);
+extern unsigned long __cmpxchg_called_with_bad_pointer(void);
+
+#define tas(ptr) (xchg((ptr), 1))
+
+#endif /* __ASSEMBLY__ */
+
+#ifndef __tilegx__
+#include <asm/atomic_32.h>
+#else
+#include <asm/atomic_64.h>
+#endif
+
+/* Provide the appropriate atomic_long_t definitions. */
+#ifndef __ASSEMBLY__
+#include <asm-generic/atomic-long.h>
+#endif
+
+#endif /* _ASM_TILE_ATOMIC_H */
diff --git a/arch/tile/include/asm/atomic_32.h b/arch/tile/include/asm/atomic_32.h
new file mode 100644
index 000000000000..ed359aee8837
--- /dev/null
+++ b/arch/tile/include/asm/atomic_32.h
@@ -0,0 +1,333 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Do not include directly; use <asm/atomic.h>.
+ */
+
+#ifndef _ASM_TILE_ATOMIC_32_H
+#define _ASM_TILE_ATOMIC_32_H
+
+#include <arch/chip.h>
+
+#ifndef __ASSEMBLY__
+
+/* Tile-specific routines to support <asm/atomic.h>. */
+int _atomic_xchg(atomic_t *v, int n);
+int _atomic_xchg_add(atomic_t *v, int i);
+int _atomic_xchg_add_unless(atomic_t *v, int a, int u);
+int _atomic_cmpxchg(atomic_t *v, int o, int n);
+
+/**
+ * atomic_xchg - atomically exchange contents of memory with a new value
+ * @v: pointer of type atomic_t
+ * @i: integer value to store in memory
+ *
+ * Atomically sets @v to @i and returns old @v
+ */
+static inline int atomic_xchg(atomic_t *v, int n)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic_xchg(v, n);
+}
+
+/**
+ * atomic_cmpxchg - atomically exchange contents of memory if it matches
+ * @v: pointer of type atomic_t
+ * @o: old value that memory should have
+ * @n: new value to write to memory if it matches
+ *
+ * Atomically checks if @v holds @o and replaces it with @n if so.
+ * Returns the old value at @v.
+ */
+static inline int atomic_cmpxchg(atomic_t *v, int o, int n)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic_cmpxchg(v, o, n);
+}
+
+/**
+ * atomic_add - add integer to atomic variable
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v.
+ */
+static inline void atomic_add(int i, atomic_t *v)
+{
+        _atomic_xchg_add(v, i);
+}
+
+/**
+ * atomic_add_return - add integer and return
+ * @v: pointer of type atomic_t
+ * @i: integer value to add
+ *
+ * Atomically adds @i to @v and returns @i + @v
+ */
+static inline int atomic_add_return(int i, atomic_t *v)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic_xchg_add(v, i) + i;
+}
+
+/**
+ * atomic_add_unless - add unless the number is already a given value
+ * @v: pointer of type atomic_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as @v was not already @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic_xchg_add_unless(v, a, u) != u;
+}
+
+/**
+ * atomic_set - set atomic variable
+ * @v: pointer of type atomic_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ *
+ * atomic_set() can't be just a raw store, since it would be lost if it
+ * fell between the load and store of one of the other atomic ops.
+ */
+static inline void atomic_set(atomic_t *v, int n)
+{
+        _atomic_xchg(v, n);
+}
+
+#define xchg(ptr, x) ((typeof(*(ptr))) \
+  ((sizeof(*(ptr)) == sizeof(atomic_t)) ? \
+   atomic_xchg((atomic_t *)(ptr), (long)(x)) : \
+   __xchg_called_with_bad_pointer()))
+
+#define cmpxchg(ptr, o, n) ((typeof(*(ptr))) \
+  ((sizeof(*(ptr)) == sizeof(atomic_t)) ? \
+   atomic_cmpxchg((atomic_t *)(ptr), (long)(o), (long)(n)) : \
+   __cmpxchg_called_with_bad_pointer()))
+
+/* A 64bit atomic type */
+
+typedef struct {
+        u64 __aligned(8) counter;
+} atomic64_t;
+
+#define ATOMIC64_INIT(val) { (val) }
+
+u64 _atomic64_xchg(atomic64_t *v, u64 n);
+u64 _atomic64_xchg_add(atomic64_t *v, u64 i);
+u64 _atomic64_xchg_add_unless(atomic64_t *v, u64 a, u64 u);
+u64 _atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n);
+
+/**
+ * atomic64_read - read atomic variable
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically reads the value of @v.
+ */
+static inline u64 atomic64_read(const atomic64_t *v)
+{
+        /*
+         * Requires an atomic op to read both 32-bit parts consistently.
+         * Casting away const is safe since the atomic support routines
+         * do not write to memory if the value has not been modified.
+         */
+        return _atomic64_xchg_add((atomic64_t *)v, 0);
+}
+
+/**
+ * atomic64_xchg - atomically exchange contents of memory with a new value
+ * @v: pointer of type atomic64_t
+ * @i: integer value to store in memory
+ *
+ * Atomically sets @v to @i and returns old @v
+ */
+static inline u64 atomic64_xchg(atomic64_t *v, u64 n)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic64_xchg(v, n);
+}
+
+/**
+ * atomic64_cmpxchg - atomically exchange contents of memory if it matches
+ * @v: pointer of type atomic64_t
+ * @o: old value that memory should have
+ * @n: new value to write to memory if it matches
+ *
+ * Atomically checks if @v holds @o and replaces it with @n if so.
+ * Returns the old value at @v.
+ */
+static inline u64 atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic64_cmpxchg(v, o, n);
+}
+
+/**
+ * atomic64_add - add integer to atomic variable
+ * @i: integer value to add
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically adds @i to @v.
+ */
+static inline void atomic64_add(u64 i, atomic64_t *v)
+{
+        _atomic64_xchg_add(v, i);
+}
+
+/**
+ * atomic64_add_return - add integer and return
+ * @v: pointer of type atomic64_t
+ * @i: integer value to add
+ *
+ * Atomically adds @i to @v and returns @i + @v
+ */
+static inline u64 atomic64_add_return(u64 i, atomic64_t *v)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic64_xchg_add(v, i) + i;
+}
+
+/**
+ * atomic64_add_unless - add unless the number is already a given value
+ * @v: pointer of type atomic64_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as @v was not already @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+static inline u64 atomic64_add_unless(atomic64_t *v, u64 a, u64 u)
+{
+        smp_mb();  /* barrier for proper semantics */
+        return _atomic64_xchg_add_unless(v, a, u) != u;
+}
+
+/**
+ * atomic64_set - set atomic variable
+ * @v: pointer of type atomic64_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ *
+ * atomic64_set() can't be just a raw store, since it would be lost if it
+ * fell between the load and store of one of the other atomic ops.
+ */
+static inline void atomic64_set(atomic64_t *v, u64 n)
+{
+        _atomic64_xchg(v, n);
+}
+
+#define atomic64_add_negative(a, v)     (atomic64_add_return((a), (v)) < 0)
+#define atomic64_inc(v)                 atomic64_add(1LL, (v))
+#define atomic64_inc_return(v)          atomic64_add_return(1LL, (v))
+#define atomic64_inc_and_test(v)        (atomic64_inc_return(v) == 0)
+#define atomic64_sub_return(i, v)       atomic64_add_return(-(i), (v))
+#define atomic64_sub_and_test(a, v)     (atomic64_sub_return((a), (v)) == 0)
+#define atomic64_sub(i, v)              atomic64_add(-(i), (v))
+#define atomic64_dec(v)                 atomic64_sub(1LL, (v))
+#define atomic64_dec_return(v)          atomic64_sub_return(1LL, (v))
+#define atomic64_dec_and_test(v)        (atomic64_dec_return((v)) == 0)
+#define atomic64_inc_not_zero(v)        atomic64_add_unless((v), 1LL, 0LL)
+
+/*
+ * We need to barrier before modifying the word, since the _atomic_xxx()
+ * routines just tns the lock and then read/modify/write of the word.
+ * But after the word is updated, the routine issues an "mf" before returning,
+ * and since it's a function call, we don't even need a compiler barrier.
+ */
+#define smp_mb__before_atomic_dec()     smp_mb()
+#define smp_mb__before_atomic_inc()     smp_mb()
+#define smp_mb__after_atomic_dec()      do { } while (0)
+#define smp_mb__after_atomic_inc()      do { } while (0)
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Internal definitions only beyond this point.
+ */
+
+#define ATOMIC_LOCKS_FOUND_VIA_TABLE() \
+  (!CHIP_HAS_CBOX_HOME_MAP() && defined(CONFIG_SMP))
+
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+
+/* Number of entries in atomic_lock_ptr[]. */
+#define ATOMIC_HASH_L1_SHIFT 6
+#define ATOMIC_HASH_L1_SIZE (1 << ATOMIC_HASH_L1_SHIFT)
+
+/* Number of locks in each struct pointed to by atomic_lock_ptr[]. */
+#define ATOMIC_HASH_L2_SHIFT (CHIP_L2_LOG_LINE_SIZE() - 2)
+#define ATOMIC_HASH_L2_SIZE (1 << ATOMIC_HASH_L2_SHIFT)
+
+#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+/*
+ * Number of atomic locks in atomic_locks[]. Must be a power of two.
+ * There is no reason for more than PAGE_SIZE / 8 entries, since that
+ * is the maximum number of pointer bits we can use to index this.
+ * And we cannot have more than PAGE_SIZE / 4, since this has to
+ * fit on a single page and each entry takes 4 bytes.
+ */
+#define ATOMIC_HASH_SHIFT (PAGE_SHIFT - 3)
+#define ATOMIC_HASH_SIZE (1 << ATOMIC_HASH_SHIFT)
+
+#ifndef __ASSEMBLY__
+extern int atomic_locks[];
+#endif
+
+#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+/*
+ * All the code that may fault while holding an atomic lock must
+ * place the pointer to the lock in ATOMIC_LOCK_REG so the fault code
+ * can correctly release and reacquire the lock.  Note that we
+ * mention the register number in a comment in "lib/atomic_asm.S" to help
+ * assembly coders from using this register by mistake, so if it
+ * is changed here, change that comment as well.
+ */
+#define ATOMIC_LOCK_REG 20
+#define ATOMIC_LOCK_REG_NAME r20
+
+#ifndef __ASSEMBLY__
+/* Called from setup to initialize a hash table to point to per_cpu locks. */
+void __init_atomic_per_cpu(void);
+
+#ifdef CONFIG_SMP
+/* Support releasing the atomic lock in do_page_fault_ics(). */
+void __atomic_fault_unlock(int *lock_ptr);
+#endif
+
+/* Private helper routines in lib/atomic_asm_32.S */
+extern struct __get_user __atomic_cmpxchg(volatile int *p,
+                                          int *lock, int o, int n);
+extern struct __get_user __atomic_xchg(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic_xchg_add(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic_xchg_add_unless(volatile int *p,
+                                                  int *lock, int o, int n);
+extern struct __get_user __atomic_or(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic_andn(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic_xor(volatile int *p, int *lock, int n);
+extern u64 __atomic64_cmpxchg(volatile u64 *p, int *lock, u64 o, u64 n);
+extern u64 __atomic64_xchg(volatile u64 *p, int *lock, u64 n);
+extern u64 __atomic64_xchg_add(volatile u64 *p, int *lock, u64 n);
+extern u64 __atomic64_xchg_add_unless(volatile u64 *p,
+                                      int *lock, u64 o, u64 n);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_ATOMIC_32_H */
diff --git a/arch/tile/include/asm/auxvec.h b/arch/tile/include/asm/auxvec.h
new file mode 100644
index 000000000000..1d393edb0641
--- /dev/null
+++ b/arch/tile/include/asm/auxvec.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_AUXVEC_H
+#define _ASM_TILE_AUXVEC_H
+
+/* No extensions to auxvec */
+
+#endif /* _ASM_TILE_AUXVEC_H */
diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h
new file mode 100644
index 000000000000..758ca4619d50
--- /dev/null
+++ b/arch/tile/include/asm/backtrace.h
@@ -0,0 +1,195 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _TILE_BACKTRACE_H
+#define _TILE_BACKTRACE_H
+
+
+
+#include <linux/types.h>
+
+#include <arch/chip.h>
+
+#if defined(__tile__)
+typedef unsigned long VirtualAddress;
+#elif CHIP_VA_WIDTH() > 32
+typedef unsigned long long VirtualAddress;
+#else
+typedef unsigned int VirtualAddress;
+#endif
+
+
+/** Reads 'size' bytes from 'address' and writes the data to 'result'.
+ * Returns true if successful, else false (e.g. memory not readable).
+ */
+typedef bool (*BacktraceMemoryReader)(void *result,
+                                      VirtualAddress address,
+                                      unsigned int size,
+                                      void *extra);
+
+typedef struct {
+        /** Current PC. */
+        VirtualAddress pc;
+
+        /** Current stack pointer value. */
+        VirtualAddress sp;
+
+        /** Current frame pointer value (i.e. caller's stack pointer) */
+        VirtualAddress fp;
+
+        /** Internal use only: caller's PC for first frame. */
+        VirtualAddress initial_frame_caller_pc;
+
+        /** Internal use only: callback to read memory. */
+        BacktraceMemoryReader read_memory_func;
+
+        /** Internal use only: arbitrary argument to read_memory_func. */
+        void *read_memory_func_extra;
+
+} BacktraceIterator;
+
+
+/** Initializes a backtracer to start from the given location.
+ *
+ * If the frame pointer cannot be determined it is set to -1.
+ *
+ * @param state The state to be filled in.
+ * @param read_memory_func A callback that reads memory. If NULL, a default
+ *        value is provided.
+ * @param read_memory_func_extra An arbitrary argument to read_memory_func.
+ * @param pc The current PC.
+ * @param lr The current value of the 'lr' register.
+ * @param sp The current value of the 'sp' register.
+ * @param r52 The current value of the 'r52' register.
+ */
+extern void backtrace_init(BacktraceIterator *state,
+                           BacktraceMemoryReader read_memory_func,
+                           void *read_memory_func_extra,
+                           VirtualAddress pc, VirtualAddress lr,
+                           VirtualAddress sp, VirtualAddress r52);
+
+
+/** Advances the backtracing state to the calling frame, returning
+ * true iff successful.
+ */
+extern bool backtrace_next(BacktraceIterator *state);
+
+
+typedef enum {
+
+        /* We have no idea what the caller's pc is. */
+        PC_LOC_UNKNOWN,
+
+        /* The caller's pc is currently in lr. */
+        PC_LOC_IN_LR,
+
+        /* The caller's pc can be found by dereferencing the caller's sp. */
+        PC_LOC_ON_STACK
+
+} CallerPCLocation;
+
+
+typedef enum {
+
+        /* We have no idea what the caller's sp is. */
+        SP_LOC_UNKNOWN,
+
+        /* The caller's sp is currently in r52. */
+        SP_LOC_IN_R52,
+
+        /* The caller's sp can be found by adding a certain constant
+         * to the current value of sp.
+         */
+        SP_LOC_OFFSET
+
+} CallerSPLocation;
+
+
+/* Bit values ORed into CALLER_* values for info ops. */
+enum {
+        /* Setting the low bit on any of these values means the info op
+         * applies only to one bundle ago.
+         */
+        ONE_BUNDLE_AGO_FLAG = 1,
+
+        /* Setting this bit on a CALLER_SP_* value means the PC is in LR.
+         * If not set, PC is on the stack.
+         */
+        PC_IN_LR_FLAG = 2,
+
+        /* This many of the low bits of a CALLER_SP_* value are for the
+         * flag bits above.
+         */
+        NUM_INFO_OP_FLAGS = 2,
+
+        /* We cannot have one in the memory pipe so this is the maximum. */
+        MAX_INFO_OPS_PER_BUNDLE = 2
+};
+
+
+/** Internal constants used to define 'info' operands. */
+enum {
+        /* 0 and 1 are reserved, as are all negative numbers. */
+
+        CALLER_UNKNOWN_BASE = 2,
+
+        CALLER_SP_IN_R52_BASE = 4,
+
+        CALLER_SP_OFFSET_BASE = 8
+};
+
+
+/** Current backtracer state describing where it thinks the caller is. */
+typedef struct {
+        /*
+         * Public fields
+         */
+
+        /* How do we find the caller's PC? */
+        CallerPCLocation pc_location : 8;
+
+        /* How do we find the caller's SP? */
+        CallerSPLocation sp_location : 8;
+
+        /* If sp_location == SP_LOC_OFFSET, then caller_sp == sp +
+         * loc->sp_offset. Else this field is undefined.
+         */
+        uint16_t sp_offset;
+
+        /* In the most recently visited bundle a terminating bundle? */
+        bool at_terminating_bundle;
+
+        /*
+         * Private fields
+         */
+
+        /* Will the forward scanner see someone clobbering sp
+         * (i.e. changing it with something other than addi sp, sp, N?)
+         */
+        bool sp_clobber_follows;
+
+        /* Operand to next "visible" info op (no more than one bundle past
+         * the next terminating bundle), or -32768 if none.
+         */
+        int16_t next_info_operand;
+
+        /* Is the info of in next_info_op in the very next bundle? */
+        bool is_next_info_operand_adjacent;
+
+} CallerLocation;
+
+
+
+
+#endif /* _TILE_BACKTRACE_H */
diff --git a/arch/tile/include/asm/bitops.h b/arch/tile/include/asm/bitops.h
new file mode 100644
index 000000000000..6832b4be8990
--- /dev/null
+++ b/arch/tile/include/asm/bitops.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright 1992, Linus Torvalds.
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_BITOPS_H
+#define _ASM_TILE_BITOPS_H
+
+#include <linux/types.h>
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#ifdef __tilegx__
+#include <asm/bitops_64.h>
+#else
+#include <asm/bitops_32.h>
+#endif
+
+/**
+ * __ffs - find first set bit in word
+ * @word: The word to search
+ *
+ * Undefined if no set bit exists, so code should check against 0 first.
+ */
+static inline unsigned long __ffs(unsigned long word)
+{
+        return __builtin_ctzl(word);
+}
+
+/**
+ * ffz - find first zero bit in word
+ * @word: The word to search
+ *
+ * Undefined if no zero exists, so code should check against ~0UL first.
+ */
+static inline unsigned long ffz(unsigned long word)
+{
+        return __builtin_ctzl(~word);
+}
+
+/**
+ * __fls - find last set bit in word
+ * @word: The word to search
+ *
+ * Undefined if no set bit exists, so code should check against 0 first.
+ */
+static inline unsigned long __fls(unsigned long word)
+{
+        return (sizeof(word) * 8) - 1 - __builtin_clzl(word);
+}
+
+/**
+ * ffs - find first set bit in word
+ * @x: the word to search
+ *
+ * This is defined the same way as the libc and compiler builtin ffs
+ * routines, therefore differs in spirit from the other bitops.
+ *
+ * ffs(value) returns 0 if value is 0 or the position of the first
+ * set bit if value is nonzero. The first (least significant) bit
+ * is at position 1.
+ */
+static inline int ffs(int x)
+{
+        return __builtin_ffs(x);
+}
+
+/**
+ * fls - find last set bit in word
+ * @x: the word to search
+ *
+ * This is defined in a similar way as the libc and compiler builtin
+ * ffs, but returns the position of the most significant set bit.
+ *
+ * fls(value) returns 0 if value is 0 or the position of the last
+ * set bit if value is nonzero. The last (most significant) bit is
+ * at position 32.
+ */
+static inline int fls(int x)
+{
+        return (sizeof(int) * 8) - __builtin_clz(x);
+}
+
+static inline int fls64(__u64 w)
+{
+        return (sizeof(__u64) * 8) - __builtin_clzll(w);
+}
+
+static inline unsigned int __arch_hweight32(unsigned int w)
+{
+        return __builtin_popcount(w);
+}
+
+static inline unsigned int __arch_hweight16(unsigned int w)
+{
+        return __builtin_popcount(w & 0xffff);
+}
+
+static inline unsigned int __arch_hweight8(unsigned int w)
+{
+        return __builtin_popcount(w & 0xff);
+}
+
+static inline unsigned long __arch_hweight64(__u64 w)
+{
+        return __builtin_popcountll(w);
+}
+
+#include <asm-generic/bitops/const_hweight.h>
+#include <asm-generic/bitops/lock.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/ext2-non-atomic.h>
+#include <asm-generic/bitops/minix.h>
+
+#endif /* _ASM_TILE_BITOPS_H */
diff --git a/arch/tile/include/asm/bitops_32.h b/arch/tile/include/asm/bitops_32.h
new file mode 100644
index 000000000000..7a93c001ac19
--- /dev/null
+++ b/arch/tile/include/asm/bitops_32.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_BITOPS_32_H
+#define _ASM_TILE_BITOPS_32_H
+
+#include <linux/compiler.h>
+#include <asm/atomic.h>
+#include <asm/system.h>
+
+/* Tile-specific routines to support <asm/bitops.h>. */
+unsigned long _atomic_or(volatile unsigned long *p, unsigned long mask);
+unsigned long _atomic_andn(volatile unsigned long *p, unsigned long mask);
+unsigned long _atomic_xor(volatile unsigned long *p, unsigned long mask);
+
+/**
+ * set_bit - Atomically set a bit in memory
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This function is atomic and may not be reordered.
+ * See __set_bit() if you do not require the atomic guarantees.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static inline void set_bit(unsigned nr, volatile unsigned long *addr)
+{
+        _atomic_or(addr + BIT_WORD(nr), BIT_MASK(nr));
+}
+
+/**
+ * clear_bit - Clears a bit in memory
+ * @nr: Bit to clear
+ * @addr: Address to start counting from
+ *
+ * clear_bit() is atomic and may not be reordered.
+ * See __clear_bit() if you do not require the atomic guarantees.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ *
+ * clear_bit() may not contain a memory barrier, so if it is used for
+ * locking purposes, you should call smp_mb__before_clear_bit() and/or
+ * smp_mb__after_clear_bit() to ensure changes are visible on other cpus.
+ */
+static inline void clear_bit(unsigned nr, volatile unsigned long *addr)
+{
+        _atomic_andn(addr + BIT_WORD(nr), BIT_MASK(nr));
+}
+
+/**
+ * change_bit - Toggle a bit in memory
+ * @nr: Bit to change
+ * @addr: Address to start counting from
+ *
+ * change_bit() is atomic and may not be reordered.
+ * See __change_bit() if you do not require the atomic guarantees.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static inline void change_bit(unsigned nr, volatile unsigned long *addr)
+{
+        _atomic_xor(addr + BIT_WORD(nr), BIT_MASK(nr));
+}
+
+/**
+ * test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_set_bit(unsigned nr, volatile unsigned long *addr)
+{
+        unsigned long mask = BIT_MASK(nr);
+        addr += BIT_WORD(nr);
+        smp_mb();  /* barrier for proper semantics */
+        return (_atomic_or(addr, mask) & mask) != 0;
+}
+
+/**
+ * test_and_clear_bit - Clear a bit and return its old value
+ * @nr: Bit to clear
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_clear_bit(unsigned nr, volatile unsigned long *addr)
+{
+        unsigned long mask = BIT_MASK(nr);
+        addr += BIT_WORD(nr);
+        smp_mb();  /* barrier for proper semantics */
+        return (_atomic_andn(addr, mask) & mask) != 0;
+}
+
+/**
+ * test_and_change_bit - Change a bit and return its old value
+ * @nr: Bit to change
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_change_bit(unsigned nr,
+                                      volatile unsigned long *addr)
+{
+        unsigned long mask = BIT_MASK(nr);
+        addr += BIT_WORD(nr);
+        smp_mb();  /* barrier for proper semantics */
+        return (_atomic_xor(addr, mask) & mask) != 0;
+}
+
+/* See discussion at smp_mb__before_atomic_dec() in <asm/atomic.h>. */
+#define smp_mb__before_clear_bit()      smp_mb()
+#define smp_mb__after_clear_bit()       do {} while (0)
+
+#include <asm-generic/bitops/non-atomic.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+
+#endif /* _ASM_TILE_BITOPS_32_H */
diff --git a/arch/tile/include/asm/bitsperlong.h b/arch/tile/include/asm/bitsperlong.h
new file mode 100644
index 000000000000..58c771f2af2f
--- /dev/null
+++ b/arch/tile/include/asm/bitsperlong.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_BITSPERLONG_H
+#define _ASM_TILE_BITSPERLONG_H
+
+#ifdef __LP64__
+# define __BITS_PER_LONG 64
+#else
+# define __BITS_PER_LONG 32
+#endif
+
+#include <asm-generic/bitsperlong.h>
+
+#endif /* _ASM_TILE_BITSPERLONG_H */
diff --git a/arch/tile/include/asm/bug.h b/arch/tile/include/asm/bug.h
new file mode 100644
index 000000000000..b12fd89e42e9
--- /dev/null
+++ b/arch/tile/include/asm/bug.h
@@ -0,0 +1 @@
+#include <asm-generic/bug.h>
diff --git a/arch/tile/include/asm/bugs.h b/arch/tile/include/asm/bugs.h
new file mode 100644
index 000000000000..61791e1ad9f5
--- /dev/null
+++ b/arch/tile/include/asm/bugs.h
@@ -0,0 +1 @@
+#include <asm-generic/bugs.h>
diff --git a/arch/tile/include/asm/byteorder.h b/arch/tile/include/asm/byteorder.h
new file mode 100644
index 000000000000..9558416d578b
--- /dev/null
+++ b/arch/tile/include/asm/byteorder.h
@@ -0,0 +1 @@
+#include <linux/byteorder/little_endian.h>
diff --git a/arch/tile/include/asm/cache.h b/arch/tile/include/asm/cache.h
new file mode 100644
index 000000000000..08a2815b5e4e
--- /dev/null
+++ b/arch/tile/include/asm/cache.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CACHE_H
+#define _ASM_TILE_CACHE_H
+
+#include <arch/chip.h>
+
+/* bytes per L1 data cache line */
+#define L1_CACHE_SHIFT          CHIP_L1D_LOG_LINE_SIZE()
+#define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
+
+/* bytes per L2 cache line */
+#define L2_CACHE_SHIFT          CHIP_L2_LOG_LINE_SIZE()
+#define L2_CACHE_BYTES          (1 << L2_CACHE_SHIFT)
+#define L2_CACHE_ALIGN(x)       (((x)+(L2_CACHE_BYTES-1)) & -L2_CACHE_BYTES)
+
+/*
+ * TILE-Gx is fully coherent so we don't need to define ARCH_DMA_MINALIGN.
+ */
+#ifndef __tilegx__
+#define ARCH_DMA_MINALIGN       L2_CACHE_BYTES
+#endif
+
+/* use the cache line size for the L2, which is where it counts */
+#define SMP_CACHE_BYTES_SHIFT   L2_CACHE_SHIFT
+#define SMP_CACHE_BYTES         L2_CACHE_BYTES
+#define INTERNODE_CACHE_SHIFT   L2_CACHE_SHIFT
+#define INTERNODE_CACHE_BYTES   L2_CACHE_BYTES
+
+/* Group together read-mostly things to avoid cache false sharing */
+#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+
+/*
+ * Attribute for data that is kept read/write coherent until the end of
+ * initialization, then bumped to read/only incoherent for performance.
+ */
+#define __write_once __attribute__((__section__(".w1data")))
+
+#endif /* _ASM_TILE_CACHE_H */
diff --git a/arch/tile/include/asm/cacheflush.h b/arch/tile/include/asm/cacheflush.h
new file mode 100644
index 000000000000..c5741da4eeac
--- /dev/null
+++ b/arch/tile/include/asm/cacheflush.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CACHEFLUSH_H
+#define _ASM_TILE_CACHEFLUSH_H
+
+#include <arch/chip.h>
+
+/* Keep includes the same across arches.  */
+#include <linux/mm.h>
+#include <linux/cache.h>
+#include <asm/system.h>
+#include <arch/icache.h>
+
+/* Caches are physically-indexed and so don't need special treatment */
+#define flush_cache_all()                       do { } while (0)
+#define flush_cache_mm(mm)                      do { } while (0)
+#define flush_cache_dup_mm(mm)                  do { } while (0)
+#define flush_cache_range(vma, start, end)      do { } while (0)
+#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
+#define flush_dcache_page(page)                 do { } while (0)
+#define flush_dcache_mmap_lock(mapping)         do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
+#define flush_cache_vmap(start, end)            do { } while (0)
+#define flush_cache_vunmap(start, end)          do { } while (0)
+#define flush_icache_page(vma, pg)              do { } while (0)
+#define flush_icache_user_range(vma, pg, adr, len)      do { } while (0)
+
+/* Flush the icache just on this cpu */
+extern void __flush_icache_range(unsigned long start, unsigned long end);
+
+/* Flush the entire icache on this cpu. */
+#define __flush_icache() __flush_icache_range(0, CHIP_L1I_CACHE_SIZE())
+
+#ifdef CONFIG_SMP
+/*
+ * When the kernel writes to its own text we need to do an SMP
+ * broadcast to make the L1I coherent everywhere.  This includes
+ * module load and single step.
+ */
+extern void flush_icache_range(unsigned long start, unsigned long end);
+#else
+#define flush_icache_range __flush_icache_range
+#endif
+
+/*
+ * An update to an executable user page requires icache flushing.
+ * We could carefully update only tiles that are running this process,
+ * and rely on the fact that we flush the icache on every context
+ * switch to avoid doing extra work here.  But for now, I'll be
+ * conservative and just do a global icache flush.
+ */
+static inline void copy_to_user_page(struct vm_area_struct *vma,
+                                     struct page *page, unsigned long vaddr,
+                                     void *dst, void *src, int len)
+{
+        memcpy(dst, src, len);
+        if (vma->vm_flags & VM_EXEC) {
+                flush_icache_range((unsigned long) dst,
+                                   (unsigned long) dst + len);
+        }
+}
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+        memcpy((dst), (src), (len))
+
+/*
+ * Invalidate a VA range; pads to L2 cacheline boundaries.
+ *
+ * Note that on TILE64, __inv_buffer() actually flushes modified
+ * cache lines in addition to invalidating them, i.e., it's the
+ * same as __finv_buffer().
+ */
+static inline void __inv_buffer(void *buffer, size_t size)
+{
+        char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
+        char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
+        while (next < finish) {
+                __insn_inv(next);
+                next += CHIP_INV_STRIDE();
+        }
+}
+
+/* Flush a VA range; pads to L2 cacheline boundaries. */
+static inline void __flush_buffer(void *buffer, size_t size)
+{
+        char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
+        char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
+        while (next < finish) {
+                __insn_flush(next);
+                next += CHIP_FLUSH_STRIDE();
+        }
+}
+
+/* Flush & invalidate a VA range; pads to L2 cacheline boundaries. */
+static inline void __finv_buffer(void *buffer, size_t size)
+{
+        char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
+        char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
+        while (next < finish) {
+                __insn_finv(next);
+                next += CHIP_FINV_STRIDE();
+        }
+}
+
+
+/* Invalidate a VA range, then memory fence. */
+static inline void inv_buffer(void *buffer, size_t size)
+{
+        __inv_buffer(buffer, size);
+        mb_incoherent();
+}
+
+/* Flush a VA range, then memory fence. */
+static inline void flush_buffer(void *buffer, size_t size)
+{
+        __flush_buffer(buffer, size);
+        mb_incoherent();
+}
+
+/* Flush & invalidate a VA range, then memory fence. */
+static inline void finv_buffer(void *buffer, size_t size)
+{
+        __finv_buffer(buffer, size);
+        mb_incoherent();
+}
+
+#endif /* _ASM_TILE_CACHEFLUSH_H */
diff --git a/arch/tile/include/asm/checksum.h b/arch/tile/include/asm/checksum.h
new file mode 100644
index 000000000000..a120766c7264
--- /dev/null
+++ b/arch/tile/include/asm/checksum.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CHECKSUM_H
+#define _ASM_TILE_CHECKSUM_H
+
+#include <asm-generic/checksum.h>
+
+/* Allow us to provide a more optimized do_csum(). */
+__wsum do_csum(const unsigned char *buff, int len);
+#define do_csum do_csum
+
+#endif /* _ASM_TILE_CHECKSUM_H */
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h
new file mode 100644
index 000000000000..5a34da6cdd79
--- /dev/null
+++ b/arch/tile/include/asm/compat.h
@@ -0,0 +1,257 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_COMPAT_H
+#define _ASM_TILE_COMPAT_H
+
+/*
+ * Architecture specific compatibility types
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+
+#define COMPAT_USER_HZ  100
+
+/* "long" and pointer-based types are different. */
+typedef s32             compat_long_t;
+typedef u32             compat_ulong_t;
+typedef u32             compat_size_t;
+typedef s32             compat_ssize_t;
+typedef s32             compat_off_t;
+typedef s32             compat_time_t;
+typedef s32             compat_clock_t;
+typedef u32             compat_ino_t;
+typedef u32             compat_caddr_t;
+typedef u32             compat_uptr_t;
+
+/* Many types are "int" or otherwise the same. */
+typedef __kernel_pid_t compat_pid_t;
+typedef __kernel_uid_t __compat_uid_t;
+typedef __kernel_gid_t __compat_gid_t;
+typedef __kernel_uid32_t __compat_uid32_t;
+typedef __kernel_uid32_t __compat_gid32_t;
+typedef __kernel_mode_t compat_mode_t;
+typedef __kernel_dev_t compat_dev_t;
+typedef __kernel_loff_t compat_loff_t;
+typedef __kernel_nlink_t compat_nlink_t;
+typedef __kernel_ipc_pid_t compat_ipc_pid_t;
+typedef __kernel_daddr_t compat_daddr_t;
+typedef __kernel_fsid_t compat_fsid_t;
+typedef __kernel_timer_t compat_timer_t;
+typedef __kernel_key_t compat_key_t;
+typedef int compat_int_t;
+typedef s64 compat_s64;
+typedef uint compat_uint_t;
+typedef u64 compat_u64;
+
+/* We use the same register dump format in 32-bit images. */
+typedef unsigned long compat_elf_greg_t;
+#define COMPAT_ELF_NGREG (sizeof(struct pt_regs) / sizeof(compat_elf_greg_t))
+typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
+
+struct compat_timespec {
+        compat_time_t   tv_sec;
+        s32             tv_nsec;
+};
+
+struct compat_timeval {
+        compat_time_t   tv_sec;
+        s32             tv_usec;
+};
+
+#define compat_stat stat
+#define compat_statfs statfs
+
+struct compat_sysctl {
+        unsigned int    name;
+        int             nlen;
+        unsigned int    oldval;
+        unsigned int    oldlenp;
+        unsigned int    newval;
+        unsigned int    newlen;
+        unsigned int    __unused[4];
+};
+
+
+struct compat_flock {
+        short           l_type;
+        short           l_whence;
+        compat_off_t    l_start;
+        compat_off_t    l_len;
+        compat_pid_t    l_pid;
+};
+
+#define F_GETLK64       12      /*  using 'struct flock64' */
+#define F_SETLK64       13
+#define F_SETLKW64      14
+
+struct compat_flock64 {
+        short           l_type;
+        short           l_whence;
+        compat_loff_t   l_start;
+        compat_loff_t   l_len;
+        compat_pid_t    l_pid;
+};
+
+#define COMPAT_RLIM_INFINITY            0xffffffff
+
+#define _COMPAT_NSIG            64
+#define _COMPAT_NSIG_BPW        32
+
+typedef u32               compat_sigset_word;
+
+#define COMPAT_OFF_T_MAX        0x7fffffff
+#define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
+
+struct compat_ipc64_perm {
+        compat_key_t key;
+        __compat_uid32_t uid;
+        __compat_gid32_t gid;
+        __compat_uid32_t cuid;
+        __compat_gid32_t cgid;
+        unsigned short mode;
+        unsigned short __pad1;
+        unsigned short seq;
+        unsigned short __pad2;
+        compat_ulong_t unused1;
+        compat_ulong_t unused2;
+};
+
+struct compat_semid64_ds {
+        struct compat_ipc64_perm sem_perm;
+        compat_time_t  sem_otime;
+        compat_ulong_t __unused1;
+        compat_time_t  sem_ctime;
+        compat_ulong_t __unused2;
+        compat_ulong_t sem_nsems;
+        compat_ulong_t __unused3;
+        compat_ulong_t __unused4;
+};
+
+struct compat_msqid64_ds {
+        struct compat_ipc64_perm msg_perm;
+        compat_time_t  msg_stime;
+        compat_ulong_t __unused1;
+        compat_time_t  msg_rtime;
+        compat_ulong_t __unused2;
+        compat_time_t  msg_ctime;
+        compat_ulong_t __unused3;
+        compat_ulong_t msg_cbytes;
+        compat_ulong_t msg_qnum;
+        compat_ulong_t msg_qbytes;
+        compat_pid_t   msg_lspid;
+        compat_pid_t   msg_lrpid;
+        compat_ulong_t __unused4;
+        compat_ulong_t __unused5;
+};
+
+struct compat_shmid64_ds {
+        struct compat_ipc64_perm shm_perm;
+        compat_size_t  shm_segsz;
+        compat_time_t  shm_atime;
+        compat_ulong_t __unused1;
+        compat_time_t  shm_dtime;
+        compat_ulong_t __unused2;
+        compat_time_t  shm_ctime;
+        compat_ulong_t __unused3;
+        compat_pid_t   shm_cpid;
+        compat_pid_t   shm_lpid;
+        compat_ulong_t shm_nattch;
+        compat_ulong_t __unused4;
+        compat_ulong_t __unused5;
+};
+
+/*
+ * A pointer passed in from user mode. This should not
+ * be used for syscall parameters, just declare them
+ * as pointers because the syscall entry code will have
+ * appropriately converted them already.
+ */
+
+static inline void __user *compat_ptr(compat_uptr_t uptr)
+{
+        return (void __user *)(long)(s32)uptr;
+}
+
+static inline compat_uptr_t ptr_to_compat(void __user *uptr)
+{
+        return (u32)(unsigned long)uptr;
+}
+
+/* Sign-extend when storing a kernel pointer to a user's ptregs. */
+static inline unsigned long ptr_to_compat_reg(void __user *uptr)
+{
+        return (long)(int)(long __force)uptr;
+}
+
+static inline void __user *compat_alloc_user_space(long len)
+{
+        struct pt_regs *regs = task_pt_regs(current);
+        return (void __user *)regs->sp - len;
+}
+
+static inline int is_compat_task(void)
+{
+        return current_thread_info()->status & TS_COMPAT;
+}
+
+extern int compat_setup_rt_frame(int sig, struct k_sigaction *ka,
+                                 siginfo_t *info, sigset_t *set,
+                                 struct pt_regs *regs);
+
+/* Compat syscalls. */
+struct compat_sigaction;
+struct compat_siginfo;
+struct compat_sigaltstack;
+long compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
+                       compat_uptr_t __user *envp);
+long compat_sys_rt_sigaction(int sig, struct compat_sigaction __user *act,
+                             struct compat_sigaction __user *oact,
+                             size_t sigsetsize);
+long compat_sys_rt_sigqueueinfo(int pid, int sig,
+                                struct compat_siginfo __user *uinfo);
+long compat_sys_rt_sigreturn(void);
+long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
+                            struct compat_sigaltstack __user *uoss_ptr);
+long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
+long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
+long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
+                        u32 dummy, u32 low, u32 high);
+long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
+                         u32 dummy, u32 low, u32 high);
+long compat_sys_lookup_dcookie(u32 low, u32 high, char __user *buf, size_t len);
+long compat_sys_sync_file_range2(int fd, unsigned int flags,
+                                 u32 offset_lo, u32 offset_hi,
+                                 u32 nbytes_lo, u32 nbytes_hi);
+long compat_sys_fallocate(int fd, int mode,
+                          u32 offset_lo, u32 offset_hi,
+                          u32 len_lo, u32 len_hi);
+long compat_sys_sched_rr_get_interval(compat_pid_t pid,
+                                      struct compat_timespec __user *interval);
+
+/* Versions of compat functions that differ from generic Linux. */
+struct compat_msgbuf;
+long tile_compat_sys_msgsnd(int msqid,
+                            struct compat_msgbuf __user *msgp,
+                            size_t msgsz, int msgflg);
+long tile_compat_sys_msgrcv(int msqid,
+                            struct compat_msgbuf __user *msgp,
+                            size_t msgsz, long msgtyp, int msgflg);
+long tile_compat_sys_ptrace(compat_long_t request, compat_long_t pid,
+                            compat_long_t addr, compat_long_t data);
+
+/* Tilera Linux syscalls that don't have "compat" versions. */
+#define compat_sys_flush_cache sys_flush_cache
+
+#endif /* _ASM_TILE_COMPAT_H */
diff --git a/arch/tile/include/asm/cputime.h b/arch/tile/include/asm/cputime.h
new file mode 100644
index 000000000000..6d68ad7e0ea3
--- /dev/null
+++ b/arch/tile/include/asm/cputime.h
@@ -0,0 +1 @@
+#include <asm-generic/cputime.h>
diff --git a/arch/tile/include/asm/current.h b/arch/tile/include/asm/current.h
new file mode 100644
index 000000000000..da21acf020d3
--- /dev/null
+++ b/arch/tile/include/asm/current.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CURRENT_H
+#define _ASM_TILE_CURRENT_H
+
+#include <linux/thread_info.h>
+
+struct task_struct;
+
+static inline struct task_struct *get_current(void)
+{
+        return current_thread_info()->task;
+}
+#define current get_current()
+
+/* Return a usable "task_struct" pointer even if the real one is corrupt. */
+struct task_struct *validate_current(void);
+
+#endif /* _ASM_TILE_CURRENT_H */
diff --git a/arch/tile/include/asm/delay.h b/arch/tile/include/asm/delay.h
new file mode 100644
index 000000000000..97b0e69e704e
--- /dev/null
+++ b/arch/tile/include/asm/delay.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_DELAY_H
+#define _ASM_TILE_DELAY_H
+
+/* Undefined functions to get compile-time errors. */
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
+extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long nsecs);
+extern void __delay(unsigned long loops);
+
+#define udelay(n) (__builtin_constant_p(n) ? \
+        ((n) > 20000 ? __bad_udelay() : __ndelay((n) * 1000)) : \
+        __udelay(n))
+
+#define ndelay(n) (__builtin_constant_p(n) ? \
+        ((n) > 20000 ? __bad_ndelay() : __ndelay(n)) : \
+        __ndelay(n))
+
+#endif /* _ASM_TILE_DELAY_H */
diff --git a/arch/tile/include/asm/device.h b/arch/tile/include/asm/device.h
new file mode 100644
index 000000000000..f0a4c256403b
--- /dev/null
+++ b/arch/tile/include/asm/device.h
@@ -0,0 +1 @@
+#include <asm-generic/device.h>
diff --git a/arch/tile/include/asm/div64.h b/arch/tile/include/asm/div64.h
new file mode 100644
index 000000000000..6cd978cefb28
--- /dev/null
+++ b/arch/tile/include/asm/div64.h
@@ -0,0 +1 @@
+#include <asm-generic/div64.h>
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
new file mode 100644
index 000000000000..15e1dceecc64
--- /dev/null
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_DMA_MAPPING_H
+#define _ASM_TILE_DMA_MAPPING_H
+
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/cache.h>
+#include <linux/io.h>
+
+/*
+ * Note that on x86 and powerpc, there is a "struct dma_mapping_ops"
+ * that is used for all the DMA operations.  For now, we don't have an
+ * equivalent on tile, because we only have a single way of doing DMA.
+ * (Tilera bug 7994 to use dma_mapping_ops.)
+ */
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+                          enum dma_data_direction);
+extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
+                             size_t size, enum dma_data_direction);
+extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+               enum dma_data_direction);
+extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+                         int nhwentries, enum dma_data_direction);
+extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
+                               unsigned long offset, size_t size,
+                               enum dma_data_direction);
+extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+                           size_t size, enum dma_data_direction);
+extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+                                int nelems, enum dma_data_direction);
+extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+                                   int nelems, enum dma_data_direction);
+
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                           dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+                         void *vaddr, dma_addr_t dma_handle);
+
+extern void dma_sync_single_for_cpu(struct device *, dma_addr_t, size_t,
+                                    enum dma_data_direction);
+extern void dma_sync_single_for_device(struct device *, dma_addr_t,
+                                       size_t, enum dma_data_direction);
+extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t,
+                                          unsigned long offset, size_t,
+                                          enum dma_data_direction);
+extern void dma_sync_single_range_for_device(struct device *, dma_addr_t,
+                                             unsigned long offset, size_t,
+                                             enum dma_data_direction);
+extern void dma_cache_sync(void *vaddr, size_t, enum dma_data_direction);
+
+static inline int
+dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+        return 0;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+        return 1;
+}
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+        if (!dev->dma_mask || !dma_supported(dev, mask))
+                return -EIO;
+
+        *dev->dma_mask = mask;
+
+        return 0;
+}
+
+#endif /* _ASM_TILE_DMA_MAPPING_H */
diff --git a/arch/tile/include/asm/dma.h b/arch/tile/include/asm/dma.h
new file mode 100644
index 000000000000..12a7ca16d164
--- /dev/null
+++ b/arch/tile/include/asm/dma.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_DMA_H
+#define _ASM_TILE_DMA_H
+
+#include <asm-generic/dma.h>
+
+/* Needed by drivers/pci/quirks.c */
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#endif
+
+#endif /* _ASM_TILE_DMA_H */
diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h
new file mode 100644
index 000000000000..623a6bb741c1
--- /dev/null
+++ b/arch/tile/include/asm/elf.h
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_ELF_H
+#define _ASM_TILE_ELF_H
+
+/*
+ * ELF register definitions.
+ */
+
+#include <arch/chip.h>
+
+#include <linux/ptrace.h>
+#include <asm/byteorder.h>
+#include <asm/page.h>
+
+typedef unsigned long elf_greg_t;
+
+#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+#define EM_TILE64  187
+#define EM_TILEPRO 188
+#define EM_TILEGX  191
+
+/* Provide a nominal data structure. */
+#define ELF_NFPREG      0
+typedef double elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+#ifdef __tilegx__
+#define ELF_CLASS       ELFCLASS64
+#else
+#define ELF_CLASS       ELFCLASS32
+#endif
+#define ELF_DATA        ELFDATA2LSB
+
+/*
+ * There seems to be a bug in how compat_binfmt_elf.c works: it
+ * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info().
+ * Hack around this by providing an enum value of ELF_ARCH.
+ */
+enum { ELF_ARCH = CHIP_ELF_TYPE() };
+#define ELF_ARCH ELF_ARCH
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x)  \
+        ((x)->e_ident[EI_CLASS] == ELF_CLASS && \
+         (x)->e_machine == CHIP_ELF_TYPE())
+
+/* The module loader only handles a few relocation types. */
+#ifndef __tilegx__
+#define R_TILE_32                 1
+#define R_TILE_JOFFLONG_X1       15
+#define R_TILE_IMM16_X0_LO       25
+#define R_TILE_IMM16_X1_LO       26
+#define R_TILE_IMM16_X0_HA       29
+#define R_TILE_IMM16_X1_HA       30
+#else
+#define R_TILEGX_64                       1
+#define R_TILEGX_JUMPOFF_X1              21
+#define R_TILEGX_IMM16_X0_HW0            36
+#define R_TILEGX_IMM16_X1_HW0            37
+#define R_TILEGX_IMM16_X0_HW1            38
+#define R_TILEGX_IMM16_X1_HW1            39
+#define R_TILEGX_IMM16_X0_HW2_LAST       48
+#define R_TILEGX_IMM16_X1_HW2_LAST       49
+#endif
+
+/* Use standard page size for core dumps. */
+#define ELF_EXEC_PAGESIZE       PAGE_SIZE
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
+ * use of this is to invoke "./ld.so someprog" to test out a new version of
+ * the loader.  We need to make sure that it is out of the way of the program
+ * that it will "exec", and that there is sufficient room for the brk.
+ */
+#define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
+
+#define ELF_CORE_COPY_REGS(_dest, _regs)                        \
+        memcpy((char *) &_dest, (char *) _regs,                 \
+               sizeof(struct pt_regs));
+
+/* No additional FP registers to copy. */
+#define ELF_CORE_COPY_FPREGS(t, fpu) 0
+
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this CPU supports.  This could be done in user space,
+ * but it's not easy, and we've already done it here.
+ */
+#define ELF_HWCAP       (0)
+
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization.  This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
+#define ELF_PLATFORM  (NULL)
+
+extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr);
+
+#define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr)
+
+extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
+#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
+
+/* Tilera Linux has no personalities currently, so no need to do anything. */
+#define SET_PERSONALITY(ex) do { } while (0)
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
+/* Support auto-mapping of the user interrupt vectors. */
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+                                       int executable_stack);
+#ifdef CONFIG_COMPAT
+
+#define COMPAT_ELF_PLATFORM "tilegx-m32"
+
+/*
+ * "Compat" binaries have the same machine type, but 32-bit class,
+ * since they're not a separate machine type, but just a 32-bit
+ * variant of the standard 64-bit architecture.
+ */
+#define compat_elf_check_arch(x)  \
+        ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \
+         (x)->e_machine == CHIP_ELF_TYPE())
+
+#define compat_start_thread(regs, ip, usp) do { \
+                regs->pc = ptr_to_compat_reg((void *)(ip)); \
+                regs->sp = ptr_to_compat_reg((void *)(usp)); \
+        } while (0)
+
+/*
+ * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT.
+ */
+#undef SET_PERSONALITY
+#define SET_PERSONALITY(ex) \
+do { \
+        current->personality = PER_LINUX; \
+        current_thread_info()->status &= ~TS_COMPAT; \
+} while (0)
+#define COMPAT_SET_PERSONALITY(ex) \
+do { \
+        current->personality = PER_LINUX_32BIT; \
+        current_thread_info()->status |= TS_COMPAT; \
+} while (0)
+
+#define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2)
+
+#endif /* CONFIG_COMPAT */
+
+#endif /* _ASM_TILE_ELF_H */
diff --git a/arch/tile/include/asm/emergency-restart.h b/arch/tile/include/asm/emergency-restart.h
new file mode 100644
index 000000000000..3711bd9d50bd
--- /dev/null
+++ b/arch/tile/include/asm/emergency-restart.h
@@ -0,0 +1 @@
+#include <asm-generic/emergency-restart.h>
diff --git a/arch/tile/include/asm/errno.h b/arch/tile/include/asm/errno.h
new file mode 100644
index 000000000000..4c82b503d92f
--- /dev/null
+++ b/arch/tile/include/asm/errno.h
@@ -0,0 +1 @@
+#include <asm-generic/errno.h>
diff --git a/arch/tile/include/asm/fcntl.h b/arch/tile/include/asm/fcntl.h
new file mode 100644
index 000000000000..46ab12db5739
--- /dev/null
+++ b/arch/tile/include/asm/fcntl.h
@@ -0,0 +1 @@
+#include <asm-generic/fcntl.h>
diff --git a/arch/tile/include/asm/fixmap.h b/arch/tile/include/asm/fixmap.h
new file mode 100644
index 000000000000..51537ff9265a
--- /dev/null
+++ b/arch/tile/include/asm/fixmap.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 1998 Ingo Molnar
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_FIXMAP_H
+#define _ASM_TILE_FIXMAP_H
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+#include <linux/kernel.h>
+#ifdef CONFIG_HIGHMEM
+#include <linux/threads.h>
+#include <asm/kmap_types.h>
+#endif
+
+#define __fix_to_virt(x)        (FIXADDR_TOP - ((x) << PAGE_SHIFT))
+#define __virt_to_fix(x)        ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
+
+/*
+ * Here we define all the compile-time 'special' virtual
+ * addresses. The point is to have a constant address at
+ * compile time, but to set the physical address only
+ * in the boot process. We allocate these special addresses
+ * from the end of supervisor virtual memory backwards.
+ * Also this lets us do fail-safe vmalloc(), we
+ * can guarantee that these special addresses and
+ * vmalloc()-ed addresses never overlap.
+ *
+ * these 'compile-time allocated' memory buffers are
+ * fixed-size 4k pages. (or larger if used with an increment
+ * higher than 1) use fixmap_set(idx,phys) to associate
+ * physical memory with fixmap indices.
+ *
+ * TLB entries of such buffers will not be flushed across
+ * task switches.
+ *
+ * We don't bother with a FIX_HOLE since above the fixmaps
+ * is unmapped memory in any case.
+ */
+enum fixed_addresses {
+#ifdef CONFIG_HIGHMEM
+        FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
+        FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+#endif
+        __end_of_permanent_fixed_addresses,
+
+        /*
+         * Temporary boot-time mappings, used before ioremap() is functional.
+         * Not currently needed by the Tile architecture.
+         */
+#define NR_FIX_BTMAPS   0
+#if NR_FIX_BTMAPS
+        FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+        FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
+        __end_of_fixed_addresses
+#else
+        __end_of_fixed_addresses = __end_of_permanent_fixed_addresses
+#endif
+};
+
+extern void __set_fixmap(enum fixed_addresses idx,
+                         unsigned long phys, pgprot_t flags);
+
+#define set_fixmap(idx, phys) \
+                __set_fixmap(idx, phys, PAGE_KERNEL)
+/*
+ * Some hardware wants to get fixmapped without caching.
+ */
+#define set_fixmap_nocache(idx, phys) \
+                __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+
+#define clear_fixmap(idx) \
+                __set_fixmap(idx, 0, __pgprot(0))
+
+#define __FIXADDR_SIZE  (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
+#define __FIXADDR_BOOT_SIZE     (__end_of_fixed_addresses << PAGE_SHIFT)
+#define FIXADDR_START           (FIXADDR_TOP + PAGE_SIZE - __FIXADDR_SIZE)
+#define FIXADDR_BOOT_START      (FIXADDR_TOP + PAGE_SIZE - __FIXADDR_BOOT_SIZE)
+
+extern void __this_fixmap_does_not_exist(void);
+
+/*
+ * 'index to address' translation. If anyone tries to use the idx
+ * directly without tranlation, we catch the bug with a NULL-deference
+ * kernel oops. Illegal ranges of incoming indices are caught too.
+ */
+static __always_inline unsigned long fix_to_virt(const unsigned int idx)
+{
+        /*
+         * this branch gets completely eliminated after inlining,
+         * except when someone tries to use fixaddr indices in an
+         * illegal way. (such as mixing up address types or using
+         * out-of-range indices).
+         *
+         * If it doesn't get removed, the linker will complain
+         * loudly with a reasonably clear error message..
+         */
+        if (idx >= __end_of_fixed_addresses)
+                __this_fixmap_does_not_exist();
+
+        return __fix_to_virt(idx);
+}
+
+static inline unsigned long virt_to_fix(const unsigned long vaddr)
+{
+        BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
+        return __virt_to_fix(vaddr);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_FIXMAP_H */
diff --git a/arch/tile/include/asm/ftrace.h b/arch/tile/include/asm/ftrace.h
new file mode 100644
index 000000000000..461459b06d98
--- /dev/null
+++ b/arch/tile/include/asm/ftrace.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_FTRACE_H
+#define _ASM_TILE_FTRACE_H
+
+/* empty */
+
+#endif /* _ASM_TILE_FTRACE_H */
diff --git a/arch/tile/include/asm/futex.h b/arch/tile/include/asm/futex.h
new file mode 100644
index 000000000000..fe0d10dcae57
--- /dev/null
+++ b/arch/tile/include/asm/futex.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * These routines make two important assumptions:
+ *
+ * 1. atomic_t is really an int and can be freely cast back and forth
+ *    (validated in __init_atomic_per_cpu).
+ *
+ * 2. userspace uses sys_cmpxchg() for all atomic operations, thus using
+ *    the same locking convention that all the kernel atomic routines use.
+ */
+
+#ifndef _ASM_TILE_FUTEX_H
+#define _ASM_TILE_FUTEX_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/futex.h>
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+
+extern struct __get_user futex_set(int __user *v, int i);
+extern struct __get_user futex_add(int __user *v, int n);
+extern struct __get_user futex_or(int __user *v, int n);
+extern struct __get_user futex_andn(int __user *v, int n);
+extern struct __get_user futex_cmpxchg(int __user *v, int o, int n);
+
+#ifndef __tilegx__
+extern struct __get_user futex_xor(int __user *v, int n);
+#else
+static inline struct __get_user futex_xor(int __user *uaddr, int n)
+{
+        struct __get_user asm_ret = __get_user_4(uaddr);
+        if (!asm_ret.err) {
+                int oldval, newval;
+                do {
+                        oldval = asm_ret.val;
+                        newval = oldval ^ n;
+                        asm_ret = futex_cmpxchg(uaddr, oldval, newval);
+                } while (asm_ret.err == 0 && oldval != asm_ret.val);
+        }
+        return asm_ret;
+}
+#endif
+
+static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
+{
+        int op = (encoded_op >> 28) & 7;
+        int cmp = (encoded_op >> 24) & 15;
+        int oparg = (encoded_op << 8) >> 20;
+        int cmparg = (encoded_op << 20) >> 20;
+        int ret;
+        struct __get_user asm_ret;
+
+        if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
+                oparg = 1 << oparg;
+
+        if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
+                return -EFAULT;
+
+        pagefault_disable();
+        switch (op) {
+        case FUTEX_OP_SET:
+                asm_ret = futex_set(uaddr, oparg);
+                break;
+        case FUTEX_OP_ADD:
+                asm_ret = futex_add(uaddr, oparg);
+                break;
+        case FUTEX_OP_OR:
+                asm_ret = futex_or(uaddr, oparg);
+                break;
+        case FUTEX_OP_ANDN:
+                asm_ret = futex_andn(uaddr, oparg);
+                break;
+        case FUTEX_OP_XOR:
+                asm_ret = futex_xor(uaddr, oparg);
+                break;
+        default:
+                asm_ret.err = -ENOSYS;
+        }
+        pagefault_enable();
+
+        ret = asm_ret.err;
+
+        if (!ret) {
+                switch (cmp) {
+                case FUTEX_OP_CMP_EQ:
+                        ret = (asm_ret.val == cmparg);
+                        break;
+                case FUTEX_OP_CMP_NE:
+                        ret = (asm_ret.val != cmparg);
+                        break;
+                case FUTEX_OP_CMP_LT:
+                        ret = (asm_ret.val < cmparg);
+                        break;
+                case FUTEX_OP_CMP_GE:
+                        ret = (asm_ret.val >= cmparg);
+                        break;
+                case FUTEX_OP_CMP_LE:
+                        ret = (asm_ret.val <= cmparg);
+                        break;
+                case FUTEX_OP_CMP_GT:
+                        ret = (asm_ret.val > cmparg);
+                        break;
+                default:
+                        ret = -ENOSYS;
+                }
+        }
+        return ret;
+}
+
+static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval,
+                                                int newval)
+{
+        struct __get_user asm_ret;
+
+        if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
+                return -EFAULT;
+
+        asm_ret = futex_cmpxchg(uaddr, oldval, newval);
+        return asm_ret.err ? asm_ret.err : asm_ret.val;
+}
+
+#ifndef __tilegx__
+/* Return failure from the atomic wrappers. */
+struct __get_user __atomic_bad_address(int __user *addr);
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_FUTEX_H */
diff --git a/arch/tile/include/asm/hardirq.h b/arch/tile/include/asm/hardirq.h
new file mode 100644
index 000000000000..822390f9a154
--- /dev/null
+++ b/arch/tile/include/asm/hardirq.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_HARDIRQ_H
+#define _ASM_TILE_HARDIRQ_H
+
+#include <linux/threads.h>
+#include <linux/cache.h>
+
+#include <asm/irq.h>
+
+typedef struct {
+        unsigned int __softirq_pending;
+        long idle_timestamp;
+
+        /* Hard interrupt statistics. */
+        unsigned int irq_timer_count;
+        unsigned int irq_syscall_count;
+        unsigned int irq_resched_count;
+        unsigned int irq_hv_flush_count;
+        unsigned int irq_call_count;
+        unsigned int irq_hv_msg_count;
+        unsigned int irq_dev_intr_count;
+
+} ____cacheline_aligned irq_cpustat_t;
+
+DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
+
+#define __ARCH_IRQ_STAT
+#define __IRQ_STAT(cpu, member) (per_cpu(irq_stat, cpu).member)
+
+#include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
+
+#define HARDIRQ_BITS    8
+
+#endif /* _ASM_TILE_HARDIRQ_H */
diff --git a/arch/tile/include/asm/hardwall.h b/arch/tile/include/asm/hardwall.h
new file mode 100644
index 000000000000..0bed3ec7b42c
--- /dev/null
+++ b/arch/tile/include/asm/hardwall.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Provide methods for the HARDWALL_FILE for accessing the UDN.
+ */
+
+#ifndef _ASM_TILE_HARDWALL_H
+#define _ASM_TILE_HARDWALL_H
+
+#include <linux/ioctl.h>
+
+#define HARDWALL_IOCTL_BASE 0xa2
+
+/*
+ * The HARDWALL_CREATE() ioctl is a macro with a "size" argument.
+ * The resulting ioctl value is passed to the kernel in conjunction
+ * with a pointer to a little-endian bitmask of cpus, which must be
+ * physically in a rectangular configuration on the chip.
+ * The "size" is the number of bytes of cpu mask data.
+ */
+#define _HARDWALL_CREATE 1
+#define HARDWALL_CREATE(size) \
+  _IOC(_IOC_READ, HARDWALL_IOCTL_BASE, _HARDWALL_CREATE, (size))
+
+#define _HARDWALL_ACTIVATE 2
+#define HARDWALL_ACTIVATE \
+  _IO(HARDWALL_IOCTL_BASE, _HARDWALL_ACTIVATE)
+
+#define _HARDWALL_DEACTIVATE 3
+#define HARDWALL_DEACTIVATE \
+ _IO(HARDWALL_IOCTL_BASE, _HARDWALL_DEACTIVATE)
+
+#ifndef __KERNEL__
+
+/* This is the canonical name expected by userspace. */
+#define HARDWALL_FILE "/dev/hardwall"
+
+#else
+
+/* Hook for /proc/tile/hardwall. */
+struct seq_file;
+int proc_tile_hardwall_show(struct seq_file *sf, void *v);
+
+#endif
+
+#endif /* _ASM_TILE_HARDWALL_H */
diff --git a/arch/tile/include/asm/highmem.h b/arch/tile/include/asm/highmem.h
new file mode 100644
index 000000000000..d155db6fa9bd
--- /dev/null
+++ b/arch/tile/include/asm/highmem.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 1999 Gerhard Wichert, Siemens AG
+ *                   Gerhard.Wichert@pdb.siemens.de
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Used in CONFIG_HIGHMEM systems for memory pages which
+ * are not addressable by direct kernel virtual addresses.
+ *
+ */
+
+#ifndef _ASM_TILE_HIGHMEM_H
+#define _ASM_TILE_HIGHMEM_H
+
+#include <linux/interrupt.h>
+#include <linux/threads.h>
+#include <asm/kmap_types.h>
+#include <asm/tlbflush.h>
+#include <asm/homecache.h>
+
+/* declarations for highmem.c */
+extern unsigned long highstart_pfn, highend_pfn;
+
+extern pte_t *pkmap_page_table;
+
+/*
+ * Ordering is:
+ *
+ * FIXADDR_TOP
+ *                      fixed_addresses
+ * FIXADDR_START
+ *                      temp fixed addresses
+ * FIXADDR_BOOT_START
+ *                      Persistent kmap area
+ * PKMAP_BASE
+ * VMALLOC_END
+ *                      Vmalloc area
+ * VMALLOC_START
+ * high_memory
+ */
+#define LAST_PKMAP_MASK (LAST_PKMAP-1)
+#define PKMAP_NR(virt)  ((virt-PKMAP_BASE) >> PAGE_SHIFT)
+#define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
+
+void *kmap_high(struct page *page);
+void kunmap_high(struct page *page);
+void *kmap(struct page *page);
+void kunmap(struct page *page);
+void *kmap_fix_kpte(struct page *page, int finished);
+
+/* This macro is used only in map_new_virtual() to map "page". */
+#define kmap_prot page_to_kpgprot(page)
+
+void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
+void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
+void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);
+struct page *kmap_atomic_to_page(void *ptr);
+void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot);
+void *kmap_atomic(struct page *page, enum km_type type);
+void kmap_atomic_fix_kpte(struct page *page, int finished);
+
+#define flush_cache_kmaps()     do { } while (0)
+
+#endif /* _ASM_TILE_HIGHMEM_H */
diff --git a/arch/tile/include/asm/homecache.h b/arch/tile/include/asm/homecache.h
new file mode 100644
index 000000000000..a8243865d49e
--- /dev/null
+++ b/arch/tile/include/asm/homecache.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Handle issues around the Tile "home cache" model of coherence.
+ */
+
+#ifndef _ASM_TILE_HOMECACHE_H
+#define _ASM_TILE_HOMECACHE_H
+
+#include <asm/page.h>
+#include <linux/cpumask.h>
+
+struct page;
+struct task_struct;
+struct vm_area_struct;
+struct zone;
+
+/*
+ * Coherence point for the page is its memory controller.
+ * It is not present in any cache (L1 or L2).
+ */
+#define PAGE_HOME_UNCACHED -1
+
+/*
+ * Is this page immutable (unwritable) and thus able to be cached more
+ * widely than would otherwise be possible?  On tile64 this means we
+ * mark the PTE to cache locally; on tilepro it means we have "nc" set.
+ */
+#define PAGE_HOME_IMMUTABLE -2
+
+/*
+ * Each cpu considers its own cache to be the home for the page,
+ * which makes it incoherent.
+ */
+#define PAGE_HOME_INCOHERENT -3
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+/* Home for the page is distributed via hash-for-home. */
+#define PAGE_HOME_HASH -4
+#endif
+
+/* Homing is unknown or unspecified.  Not valid for page_home(). */
+#define PAGE_HOME_UNKNOWN -5
+
+/* Home on the current cpu.  Not valid for page_home(). */
+#define PAGE_HOME_HERE -6
+
+/* Support wrapper to use instead of explicit hv_flush_remote(). */
+extern void flush_remote(unsigned long cache_pfn, unsigned long cache_length,
+                         const struct cpumask *cache_cpumask,
+                         HV_VirtAddr tlb_va, unsigned long tlb_length,
+                         unsigned long tlb_pgsize,
+                         const struct cpumask *tlb_cpumask,
+                         HV_Remote_ASID *asids, int asidcount);
+
+/* Set homing-related bits in a PTE (can also pass a pgprot_t). */
+extern pte_t pte_set_home(pte_t pte, int home);
+
+/* Do a cache eviction on the specified cpus. */
+extern void homecache_evict(const struct cpumask *mask);
+
+/*
+ * Change a kernel page's homecache.  It must not be mapped in user space.
+ * If !CONFIG_HOMECACHE, only usable on LOWMEM, and can only be called when
+ * no other cpu can reference the page, and causes a full-chip cache/TLB flush.
+ */
+extern void homecache_change_page_home(struct page *, int order, int home);
+
+/*
+ * Flush a page out of whatever cache(s) it is in.
+ * This is more than just finv, since it properly handles waiting
+ * for the data to reach memory on tilepro, but it can be quite
+ * heavyweight, particularly on hash-for-home memory.
+ */
+extern void homecache_flush_cache(struct page *, int order);
+
+/*
+ * Allocate a page with the given GFP flags, home, and optionally
+ * node.  These routines are actually just wrappers around the normal
+ * alloc_pages() / alloc_pages_node() functions, which set and clear
+ * a per-cpu variable to communicate with homecache_new_kernel_page().
+ * If !CONFIG_HOMECACHE, uses homecache_change_page_home().
+ */
+extern struct page *homecache_alloc_pages(gfp_t gfp_mask,
+                                          unsigned int order, int home);
+extern struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask,
+                                               unsigned int order, int home);
+#define homecache_alloc_page(gfp_mask, home) \
+  homecache_alloc_pages(gfp_mask, 0, home)
+
+/*
+ * These routines are just pass-throughs to free_pages() when
+ * we support full homecaching.  If !CONFIG_HOMECACHE, then these
+ * routines use homecache_change_page_home() to reset the home
+ * back to the default before returning the page to the allocator.
+ */
+void homecache_free_pages(unsigned long addr, unsigned int order);
+#define homecache_free_page(page) \
+  homecache_free_pages((page), 0)
+
+
+
+/*
+ * Report the page home for LOWMEM pages by examining their kernel PTE,
+ * or for highmem pages as the default home.
+ */
+extern int page_home(struct page *);
+
+#define homecache_migrate_kthread() do {} while (0)
+
+#define homecache_kpte_lock() 0
+#define homecache_kpte_unlock(flags) do {} while (0)
+
+
+#endif /* _ASM_TILE_HOMECACHE_H */
diff --git a/arch/tile/include/asm/hugetlb.h b/arch/tile/include/asm/hugetlb.h
new file mode 100644
index 000000000000..0521c277bbde
--- /dev/null
+++ b/arch/tile/include/asm/hugetlb.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_HUGETLB_H
+#define _ASM_TILE_HUGETLB_H
+
+#include <asm/page.h>
+
+
+static inline int is_hugepage_only_range(struct mm_struct *mm,
+                                         unsigned long addr,
+                                         unsigned long len) {
+        return 0;
+}
+
+/*
+ * If the arch doesn't supply something else, assume that hugepage
+ * size aligned regions are ok without further preparation.
+ */
+static inline int prepare_hugepage_range(struct file *file,
+                                         unsigned long addr, unsigned long len)
+{
+        struct hstate *h = hstate_file(file);
+        if (len & ~huge_page_mask(h))
+                return -EINVAL;
+        if (addr & ~huge_page_mask(h))
+                return -EINVAL;
+        return 0;
+}
+
+static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
+{
+}
+
+static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
+                                          unsigned long addr, unsigned long end,
+                                          unsigned long floor,
+                                          unsigned long ceiling)
+{
+        free_pgd_range(tlb, addr, end, floor, ceiling);
+}
+
+static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
+                                   pte_t *ptep, pte_t pte)
+{
+        set_pte_order(ptep, pte, HUGETLB_PAGE_ORDER);
+}
+
+static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
+                                            unsigned long addr, pte_t *ptep)
+{
+        return ptep_get_and_clear(mm, addr, ptep);
+}
+
+static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
+                                         unsigned long addr, pte_t *ptep)
+{
+        ptep_clear_flush(vma, addr, ptep);
+}
+
+static inline int huge_pte_none(pte_t pte)
+{
+        return pte_none(pte);
+}
+
+static inline pte_t huge_pte_wrprotect(pte_t pte)
+{
+        return pte_wrprotect(pte);
+}
+
+static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
+                                           unsigned long addr, pte_t *ptep)
+{
+        ptep_set_wrprotect(mm, addr, ptep);
+}
+
+static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
+                                             unsigned long addr, pte_t *ptep,
+                                             pte_t pte, int dirty)
+{
+        return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
+}
+
+static inline pte_t huge_ptep_get(pte_t *ptep)
+{
+        return *ptep;
+}
+
+static inline int arch_prepare_hugepage(struct page *page)
+{
+        return 0;
+}
+
+static inline void arch_release_hugepage(struct page *page)
+{
+}
+
+#endif /* _ASM_TILE_HUGETLB_H */
diff --git a/arch/tile/include/asm/hv_driver.h b/arch/tile/include/asm/hv_driver.h
new file mode 100644
index 000000000000..ad614de899b3
--- /dev/null
+++ b/arch/tile/include/asm/hv_driver.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This header defines a wrapper interface for managing hypervisor
+ * device calls that will result in an interrupt at some later time.
+ * In particular, this provides wrappers for hv_preada() and
+ * hv_pwritea().
+ */
+
+#ifndef _ASM_TILE_HV_DRIVER_H
+#define _ASM_TILE_HV_DRIVER_H
+
+#include <hv/hypervisor.h>
+
+struct hv_driver_cb;
+
+/* A callback to be invoked when an operation completes. */
+typedef void hv_driver_callback_t(struct hv_driver_cb *cb, __hv32 result);
+
+/*
+ * A structure to hold information about an outstanding call.
+ * The driver must allocate a separate structure for each call.
+ */
+struct hv_driver_cb {
+        hv_driver_callback_t *callback;  /* Function to call on interrupt. */
+        void *dev;                       /* Driver-specific state variable. */
+};
+
+/* Wrapper for invoking hv_dev_preada(). */
+static inline int
+tile_hv_dev_preada(int devhdl, __hv32 flags, __hv32 sgl_len,
+                   HV_SGL sgl[/* sgl_len */], __hv64 offset,
+                   struct hv_driver_cb *callback)
+{
+        return hv_dev_preada(devhdl, flags, sgl_len, sgl,
+                             offset, (HV_IntArg)callback);
+}
+
+/* Wrapper for invoking hv_dev_pwritea(). */
+static inline int
+tile_hv_dev_pwritea(int devhdl, __hv32 flags, __hv32 sgl_len,
+                    HV_SGL sgl[/* sgl_len */], __hv64 offset,
+                    struct hv_driver_cb *callback)
+{
+        return hv_dev_pwritea(devhdl, flags, sgl_len, sgl,
+                              offset, (HV_IntArg)callback);
+}
+
+
+#endif /* _ASM_TILE_HV_DRIVER_H */
diff --git a/arch/tile/include/asm/hw_irq.h b/arch/tile/include/asm/hw_irq.h
new file mode 100644
index 000000000000..4fac5fbf333e
--- /dev/null
+++ b/arch/tile/include/asm/hw_irq.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_HW_IRQ_H
+#define _ASM_TILE_HW_IRQ_H
+
+#endif /* _ASM_TILE_HW_IRQ_H */
diff --git a/arch/tile/include/asm/ide.h b/arch/tile/include/asm/ide.h
new file mode 100644
index 000000000000..3c6f2ed894ce
--- /dev/null
+++ b/arch/tile/include/asm/ide.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_IDE_H
+#define _ASM_TILE_IDE_H
+
+/* For IDE on PCI */
+#define MAX_HWIFS       10
+
+#define ide_default_io_ctl(base)        (0)
+
+#include <asm-generic/ide_iops.h>
+
+#endif /* _ASM_TILE_IDE_H */
diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
new file mode 100644
index 000000000000..8c95bef3fa45
--- /dev/null
+++ b/arch/tile/include/asm/io.h
@@ -0,0 +1,279 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_IO_H
+#define _ASM_TILE_IO_H
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <asm/page.h>
+
+#define IO_SPACE_LIMIT 0xfffffffful
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access.
+ */
+#define xlate_dev_mem_ptr(p)    __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer.
+ */
+#define xlate_dev_kmem_ptr(p)   p
+
+/*
+ * Change "struct page" to physical address.
+ */
+#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
+
+/*
+ * Some places try to pass in an loff_t for PHYSADDR (?!), so we cast it to
+ * long before casting it to a pointer to avoid compiler warnings.
+ */
+#if CHIP_HAS_MMIO()
+extern void __iomem *ioremap(resource_size_t offset, unsigned long size);
+extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
+        pgprot_t pgprot);
+extern void iounmap(volatile void __iomem *addr);
+#else
+#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
+#define iounmap(addr)           ((void)0)
+#endif
+
+#define ioremap_nocache(physaddr, size)         ioremap(physaddr, size)
+#define ioremap_writethrough(physaddr, size)    ioremap(physaddr, size)
+#define ioremap_fullcache(physaddr, size)       ioremap(physaddr, size)
+
+void __iomem *ioport_map(unsigned long port, unsigned int len);
+extern inline void ioport_unmap(void __iomem *addr) {}
+
+#define mmiowb()
+
+/* Conversion between virtual and physical mappings.  */
+#define mm_ptov(addr)           ((void *)phys_to_virt(addr))
+#define mm_vtop(addr)           ((unsigned long)virt_to_phys(addr))
+
+#ifdef CONFIG_PCI
+
+extern u8 _tile_readb(unsigned long addr);
+extern u16 _tile_readw(unsigned long addr);
+extern u32 _tile_readl(unsigned long addr);
+extern u64 _tile_readq(unsigned long addr);
+extern void _tile_writeb(u8  val, unsigned long addr);
+extern void _tile_writew(u16 val, unsigned long addr);
+extern void _tile_writel(u32 val, unsigned long addr);
+extern void _tile_writeq(u64 val, unsigned long addr);
+
+#else
+
+/*
+ * The Tile architecture does not support IOMEM unless PCI is enabled.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int iomem_panic(void)
+{
+        panic("readb/writeb and friends do not exist on tile without PCI");
+        return 0;
+}
+
+static inline u8 _tile_readb(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u16 _tile_readw(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u32 _tile_readl(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u64 _tile_readq(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline void _tile_writeb(u8  val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writew(u16 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writel(u32 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writeq(u64 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+#endif
+
+#define readb(addr) _tile_readb((unsigned long)addr)
+#define readw(addr) _tile_readw((unsigned long)addr)
+#define readl(addr) _tile_readl((unsigned long)addr)
+#define readq(addr) _tile_readq((unsigned long)addr)
+#define writeb(val, addr) _tile_writeb(val, (unsigned long)addr)
+#define writew(val, addr) _tile_writew(val, (unsigned long)addr)
+#define writel(val, addr) _tile_writel(val, (unsigned long)addr)
+#define writeq(val, addr) _tile_writeq(val, (unsigned long)addr)
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_readq readq
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
+#define readq_relaxed readq
+
+#define ioread8 readb
+#define ioread16 readw
+#define ioread32 readl
+#define ioread64 readq
+#define iowrite8 writeb
+#define iowrite16 writew
+#define iowrite32 writel
+#define iowrite64 writeq
+
+static inline void *memcpy_fromio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)src & 0x3);
+        for (x = 0; x < len; x += 4)
+                *(u32 *)(dst + x) = readl(src + x);
+        return dst;
+}
+
+static inline void *memcpy_toio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)dst & 0x3);
+        for (x = 0; x < len; x += 4)
+                writel(*(u32 *)(src + x), dst + x);
+        return dst;
+}
+
+/*
+ * The Tile architecture does not support IOPORT, even with PCI.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int ioport_panic(void)
+{
+        panic("inb/outb and friends do not exist on tile");
+        return 0;
+}
+
+static inline u8 inb(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u16 inw(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u32 inl(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline void outb(u8 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outw(u16 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outl(u32 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+#define inb_p(addr)     inb(addr)
+#define inw_p(addr)     inw(addr)
+#define inl_p(addr)     inl(addr)
+#define outb_p(x, addr) outb((x), (addr))
+#define outw_p(x, addr) outw((x), (addr))
+#define outl_p(x, addr) outl((x), (addr))
+
+static inline void insb(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insw(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insl(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsb(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsw(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsl(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+#define ioread8_rep(p, dst, count) \
+        insb((unsigned long) (p), (dst), (count))
+#define ioread16_rep(p, dst, count) \
+        insw((unsigned long) (p), (dst), (count))
+#define ioread32_rep(p, dst, count) \
+        insl((unsigned long) (p), (dst), (count))
+
+#define iowrite8_rep(p, src, count) \
+        outsb((unsigned long) (p), (src), (count))
+#define iowrite16_rep(p, src, count) \
+        outsw((unsigned long) (p), (src), (count))
+#define iowrite32_rep(p, src, count) \
+        outsl((unsigned long) (p), (src), (count))
+
+#endif /* _ASM_TILE_IO_H */
diff --git a/arch/tile/include/asm/ioctl.h b/arch/tile/include/asm/ioctl.h
new file mode 100644
index 000000000000..b279fe06dfe5
--- /dev/null
+++ b/arch/tile/include/asm/ioctl.h
@@ -0,0 +1 @@
+#include <asm-generic/ioctl.h>
diff --git a/arch/tile/include/asm/ioctls.h b/arch/tile/include/asm/ioctls.h
new file mode 100644
index 000000000000..ec34c760665e
--- /dev/null
+++ b/arch/tile/include/asm/ioctls.h
@@ -0,0 +1 @@
+#include <asm-generic/ioctls.h>
diff --git a/arch/tile/include/asm/ipc.h b/arch/tile/include/asm/ipc.h
new file mode 100644
index 000000000000..a46e3d9c2a3f
--- /dev/null
+++ b/arch/tile/include/asm/ipc.h
@@ -0,0 +1 @@
+#include <asm-generic/ipc.h>
diff --git a/arch/tile/include/asm/ipcbuf.h b/arch/tile/include/asm/ipcbuf.h
new file mode 100644
index 000000000000..84c7e51cb6d0
--- /dev/null
+++ b/arch/tile/include/asm/ipcbuf.h
@@ -0,0 +1 @@
+#include <asm-generic/ipcbuf.h>
diff --git a/arch/tile/include/asm/irq.h b/arch/tile/include/asm/irq.h
new file mode 100644
index 000000000000..572fd3ef1d73
--- /dev/null
+++ b/arch/tile/include/asm/irq.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_IRQ_H
+#define _ASM_TILE_IRQ_H
+
+#include <linux/hardirq.h>
+
+/* The hypervisor interface provides 32 IRQs. */
+#define NR_IRQS 32
+
+/* IRQ numbers used for linux IPIs. */
+#define IRQ_RESCHEDULE 1
+
+void ack_bad_irq(unsigned int irq);
+
+/*
+ * Different ways of handling interrupts.  Tile interrupts are always
+ * per-cpu; there is no global interrupt controller to implement
+ * enable/disable.  Most onboard devices can send their interrupts to
+ * many tiles at the same time, and Tile-specific drivers know how to
+ * deal with this.
+ *
+ * However, generic devices (usually PCIE based, sometimes GPIO)
+ * expect that interrupts will fire on a single core at a time and
+ * that the irq can be enabled or disabled from any core at any time.
+ * We implement this by directing such interrupts to a single core.
+ *
+ * One added wrinkle is that PCI interrupts can be either
+ * hardware-cleared (legacy interrupts) or software cleared (MSI).
+ * Other generic device systems (GPIO) are always software-cleared.
+ *
+ * The enums below are used by drivers for onboard devices, including
+ * the internals of PCI root complex and GPIO.  They allow the driver
+ * to tell the generic irq code what kind of interrupt is mapped to a
+ * particular IRQ number.
+ */
+enum {
+        /* per-cpu interrupt; use enable/disable_percpu_irq() to mask */
+        TILE_IRQ_PERCPU,
+        /* global interrupt, hardware responsible for clearing. */
+        TILE_IRQ_HW_CLEAR,
+        /* global interrupt, software responsible for clearing. */
+        TILE_IRQ_SW_CLEAR,
+};
+
+
+/*
+ * Paravirtualized drivers should call this when they dynamically
+ * allocate a new IRQ or discover an IRQ that was pre-allocated by the
+ * hypervisor for use with their particular device.  This gives the
+ * IRQ subsystem an opportunity to do interrupt-type-specific
+ * initialization.
+ *
+ * ISSUE: We should modify this API so that registering anything
+ * except percpu interrupts also requires providing callback methods
+ * for enabling and disabling the interrupt.  This would allow the
+ * generic IRQ code to proxy enable/disable_irq() calls back into the
+ * PCI subsystem, which in turn could enable or disable the interrupt
+ * at the PCI shim.
+ */
+void tile_irq_activate(unsigned int irq, int tile_irq_type);
+
+/*
+ * For onboard, non-PCI (e.g. TILE_IRQ_PERCPU) devices, drivers know
+ * how to use enable/disable_percpu_irq() to manage interrupts on each
+ * core.  We can't use the generic enable/disable_irq() because they
+ * use a single reference count per irq, rather than per cpu per irq.
+ */
+void enable_percpu_irq(unsigned int irq);
+void disable_percpu_irq(unsigned int irq);
+
+
+void setup_irq_regs(void);
+
+#endif /* _ASM_TILE_IRQ_H */
diff --git a/arch/tile/include/asm/irq_regs.h b/arch/tile/include/asm/irq_regs.h
new file mode 100644
index 000000000000..3dd9c0b70270
--- /dev/null
+++ b/arch/tile/include/asm/irq_regs.h
@@ -0,0 +1 @@
+#include <asm-generic/irq_regs.h>
diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h
new file mode 100644
index 000000000000..45cf67c2f286
--- /dev/null
+++ b/arch/tile/include/asm/irqflags.h
@@ -0,0 +1,266 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_IRQFLAGS_H
+#define _ASM_TILE_IRQFLAGS_H
+
+#include <arch/interrupts.h>
+#include <arch/chip.h>
+
+/*
+ * The set of interrupts we want to allow when interrupts are nominally
+ * disabled.  The remainder are effectively "NMI" interrupts from
+ * the point of view of the generic Linux code.  Note that synchronous
+ * interrupts (aka "non-queued") are not blocked by the mask in any case.
+ */
+#if CHIP_HAS_AUX_PERF_COUNTERS()
+#define LINUX_MASKABLE_INTERRUPTS \
+        (~(INT_MASK(INT_PERF_COUNT) | INT_MASK(INT_AUX_PERF_COUNT)))
+#else
+#define LINUX_MASKABLE_INTERRUPTS \
+        (~(INT_MASK(INT_PERF_COUNT)))
+#endif
+
+#ifndef __ASSEMBLY__
+
+/* NOTE: we can't include <linux/percpu.h> due to #include dependencies. */
+#include <asm/percpu.h>
+#include <arch/spr_def.h>
+
+/* Set and clear kernel interrupt masks. */
+#if CHIP_HAS_SPLIT_INTR_MASK()
+#if INT_PERF_COUNT < 32 || INT_AUX_PERF_COUNT < 32 || INT_MEM_ERROR >= 32
+# error Fix assumptions about which word various interrupts are in
+#endif
+#define interrupt_mask_set(n) do { \
+        int __n = (n); \
+        int __mask = 1 << (__n & 0x1f); \
+        if (__n < 32) \
+                __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_0, __mask); \
+        else \
+                __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_1, __mask); \
+} while (0)
+#define interrupt_mask_reset(n) do { \
+        int __n = (n); \
+        int __mask = 1 << (__n & 0x1f); \
+        if (__n < 32) \
+                __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_0, __mask); \
+        else \
+                __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_1, __mask); \
+} while (0)
+#define interrupt_mask_check(n) ({ \
+        int __n = (n); \
+        (((__n < 32) ? \
+         __insn_mfspr(SPR_INTERRUPT_MASK_1_0) : \
+         __insn_mfspr(SPR_INTERRUPT_MASK_1_1)) \
+          >> (__n & 0x1f)) & 1; \
+})
+#define interrupt_mask_set_mask(mask) do { \
+        unsigned long long __m = (mask); \
+        __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_0, (unsigned long)(__m)); \
+        __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_1, (unsigned long)(__m>>32)); \
+} while (0)
+#define interrupt_mask_reset_mask(mask) do { \
+        unsigned long long __m = (mask); \
+        __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_0, (unsigned long)(__m)); \
+        __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_1, (unsigned long)(__m>>32)); \
+} while (0)
+#else
+#define interrupt_mask_set(n) \
+        __insn_mtspr(SPR_INTERRUPT_MASK_SET_1, (1UL << (n)))
+#define interrupt_mask_reset(n) \
+        __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1, (1UL << (n)))
+#define interrupt_mask_check(n) \
+        ((__insn_mfspr(SPR_INTERRUPT_MASK_1) >> (n)) & 1)
+#define interrupt_mask_set_mask(mask) \
+        __insn_mtspr(SPR_INTERRUPT_MASK_SET_1, (mask))
+#define interrupt_mask_reset_mask(mask) \
+        __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1, (mask))
+#endif
+
+/*
+ * The set of interrupts we want active if irqs are enabled.
+ * Note that in particular, the tile timer interrupt comes and goes
+ * from this set, since we have no other way to turn off the timer.
+ * Likewise, INTCTRL_1 is removed and re-added during device
+ * interrupts, as is the the hardwall UDN_FIREWALL interrupt.
+ * We use a low bit (MEM_ERROR) as our sentinel value and make sure it
+ * is always claimed as an "active interrupt" so we can query that bit
+ * to know our current state.
+ */
+DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask);
+#define INITIAL_INTERRUPTS_ENABLED INT_MASK(INT_MEM_ERROR)
+
+/* Disable interrupts. */
+#define raw_local_irq_disable() \
+        interrupt_mask_set_mask(LINUX_MASKABLE_INTERRUPTS)
+
+/* Disable all interrupts, including NMIs. */
+#define raw_local_irq_disable_all() \
+        interrupt_mask_set_mask(-1UL)
+
+/* Re-enable all maskable interrupts. */
+#define raw_local_irq_enable() \
+        interrupt_mask_reset_mask(__get_cpu_var(interrupts_enabled_mask))
+
+/* Disable or enable interrupts based on flag argument. */
+#define raw_local_irq_restore(disabled) do { \
+        if (disabled) \
+                raw_local_irq_disable(); \
+        else \
+                raw_local_irq_enable(); \
+} while (0)
+
+/* Return true if "flags" argument means interrupts are disabled. */
+#define raw_irqs_disabled_flags(flags) ((flags) != 0)
+
+/* Return true if interrupts are currently disabled. */
+#define raw_irqs_disabled() interrupt_mask_check(INT_MEM_ERROR)
+
+/* Save whether interrupts are currently disabled. */
+#define raw_local_save_flags(flags) ((flags) = raw_irqs_disabled())
+
+/* Save whether interrupts are currently disabled, then disable them. */
+#define raw_local_irq_save(flags) \
+        do { raw_local_save_flags(flags); raw_local_irq_disable(); } while (0)
+
+/* Prevent the given interrupt from being enabled next time we enable irqs. */
+#define raw_local_irq_mask(interrupt) \
+        (__get_cpu_var(interrupts_enabled_mask) &= ~INT_MASK(interrupt))
+
+/* Prevent the given interrupt from being enabled immediately. */
+#define raw_local_irq_mask_now(interrupt) do { \
+        raw_local_irq_mask(interrupt); \
+        interrupt_mask_set(interrupt); \
+} while (0)
+
+/* Allow the given interrupt to be enabled next time we enable irqs. */
+#define raw_local_irq_unmask(interrupt) \
+        (__get_cpu_var(interrupts_enabled_mask) |= INT_MASK(interrupt))
+
+/* Allow the given interrupt to be enabled immediately, if !irqs_disabled. */
+#define raw_local_irq_unmask_now(interrupt) do { \
+        raw_local_irq_unmask(interrupt); \
+        if (!irqs_disabled()) \
+                interrupt_mask_reset(interrupt); \
+} while (0)
+
+#else /* __ASSEMBLY__ */
+
+/* We provide a somewhat more restricted set for assembly. */
+
+#ifdef __tilegx__
+
+#if INT_MEM_ERROR != 0
+# error Fix IRQ_DISABLED() macro
+#endif
+
+/* Return 0 or 1 to indicate whether interrupts are currently disabled. */
+#define IRQS_DISABLED(tmp)                                      \
+        mfspr   tmp, INTERRUPT_MASK_1;                          \
+        andi    tmp, tmp, 1
+
+/* Load up a pointer to &interrupts_enabled_mask. */
+#define GET_INTERRUPTS_ENABLED_MASK_PTR(reg)                    \
+        moveli reg, hw2_last(interrupts_enabled_mask); \
+        shl16insli reg, reg, hw1(interrupts_enabled_mask); \
+        shl16insli reg, reg, hw0(interrupts_enabled_mask); \
+        add     reg, reg, tp
+
+/* Disable interrupts. */
+#define IRQ_DISABLE(tmp0, tmp1)                                 \
+        moveli  tmp0, hw2_last(LINUX_MASKABLE_INTERRUPTS);      \
+        shl16insli tmp0, tmp0, hw1(LINUX_MASKABLE_INTERRUPTS);  \
+        shl16insli tmp0, tmp0, hw0(LINUX_MASKABLE_INTERRUPTS);  \
+        mtspr   INTERRUPT_MASK_SET_1, tmp0
+
+/* Disable ALL synchronous interrupts (used by NMI entry). */
+#define IRQ_DISABLE_ALL(tmp)                                    \
+        movei   tmp, -1;                                        \
+        mtspr   INTERRUPT_MASK_SET_1, tmp
+
+/* Enable interrupts. */
+#define IRQ_ENABLE(tmp0, tmp1)                                  \
+        GET_INTERRUPTS_ENABLED_MASK_PTR(tmp0);                  \
+        ld      tmp0, tmp0;                                     \
+        mtspr   INTERRUPT_MASK_RESET_1, tmp0
+
+#else /* !__tilegx__ */
+
+/*
+ * Return 0 or 1 to indicate whether interrupts are currently disabled.
+ * Note that it's important that we use a bit from the "low" mask word,
+ * since when we are enabling, that is the word we write first, so if we
+ * are interrupted after only writing half of the mask, the interrupt
+ * handler will correctly observe that we have interrupts enabled, and
+ * will enable interrupts itself on return from the interrupt handler
+ * (making the original code's write of the "high" mask word idempotent).
+ */
+#define IRQS_DISABLED(tmp)                                      \
+        mfspr   tmp, INTERRUPT_MASK_1_0;                        \
+        shri    tmp, tmp, INT_MEM_ERROR;                        \
+        andi    tmp, tmp, 1
+
+/* Load up a pointer to &interrupts_enabled_mask. */
+#define GET_INTERRUPTS_ENABLED_MASK_PTR(reg)                    \
+        moveli  reg, lo16(interrupts_enabled_mask);     \
+        auli    reg, reg, ha16(interrupts_enabled_mask);\
+        add     reg, reg, tp
+
+/* Disable interrupts. */
+#define IRQ_DISABLE(tmp0, tmp1)                                 \
+        {                                                       \
+         movei  tmp0, -1;                                       \
+         moveli tmp1, lo16(LINUX_MASKABLE_INTERRUPTS)           \
+        };                                                      \
+        {                                                       \
+         mtspr  INTERRUPT_MASK_SET_1_0, tmp0;                   \
+         auli   tmp1, tmp1, ha16(LINUX_MASKABLE_INTERRUPTS)     \
+        };                                                      \
+        mtspr   INTERRUPT_MASK_SET_1_1, tmp1
+
+/* Disable ALL synchronous interrupts (used by NMI entry). */
+#define IRQ_DISABLE_ALL(tmp)                                    \
+        movei   tmp, -1;                                        \
+        mtspr   INTERRUPT_MASK_SET_1_0, tmp;                    \
+        mtspr   INTERRUPT_MASK_SET_1_1, tmp
+
+/* Enable interrupts. */
+#define IRQ_ENABLE(tmp0, tmp1)                                  \
+        GET_INTERRUPTS_ENABLED_MASK_PTR(tmp0);                  \
+        {                                                       \
+         lw     tmp0, tmp0;                                     \
+         addi   tmp1, tmp0, 4                                   \
+        };                                                      \
+        lw      tmp1, tmp1;                                     \
+        mtspr   INTERRUPT_MASK_RESET_1_0, tmp0;                 \
+        mtspr   INTERRUPT_MASK_RESET_1_1, tmp1
+#endif
+
+/*
+ * Do the CPU's IRQ-state tracing from assembly code. We call a
+ * C function, but almost everywhere we do, we don't mind clobbering
+ * all the caller-saved registers.
+ */
+#ifdef CONFIG_TRACE_IRQFLAGS
+# define TRACE_IRQS_ON  jal trace_hardirqs_on
+# define TRACE_IRQS_OFF jal trace_hardirqs_off
+#else
+# define TRACE_IRQS_ON
+# define TRACE_IRQS_OFF
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_TILE_IRQFLAGS_H */
diff --git a/arch/tile/include/asm/kdebug.h b/arch/tile/include/asm/kdebug.h
new file mode 100644
index 000000000000..6ece1b037665
--- /dev/null
+++ b/arch/tile/include/asm/kdebug.h
@@ -0,0 +1 @@
+#include <asm-generic/kdebug.h>
diff --git a/arch/tile/include/asm/kexec.h b/arch/tile/include/asm/kexec.h
new file mode 100644
index 000000000000..c11a6cc73bb8
--- /dev/null
+++ b/arch/tile/include/asm/kexec.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * based on kexec.h from other architectures in linux-2.6.18
+ */
+
+#ifndef _ASM_TILE_KEXEC_H
+#define _ASM_TILE_KEXEC_H
+
+#include <asm/page.h>
+
+/* Maximum physical address we can use pages from. */
+#define KEXEC_SOURCE_MEMORY_LIMIT TASK_SIZE
+/* Maximum address we can reach in physical address mode. */
+#define KEXEC_DESTINATION_MEMORY_LIMIT TASK_SIZE
+/* Maximum address we can use for the control code buffer. */
+#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
+
+#define KEXEC_CONTROL_PAGE_SIZE PAGE_SIZE
+
+/*
+ * We don't bother to provide a unique identifier, since we can only
+ * reboot with a single type of kernel image anyway.
+ */
+#define KEXEC_ARCH KEXEC_ARCH_DEFAULT
+
+/* Use the tile override for the page allocator. */
+struct page *kimage_alloc_pages_arch(gfp_t gfp_mask, unsigned int order);
+#define kimage_alloc_pages_arch kimage_alloc_pages_arch
+
+#define MAX_NOTE_BYTES 1024
+
+/* Defined in arch/tile/kernel/relocate_kernel.S */
+extern const unsigned char relocate_new_kernel[];
+extern const unsigned long relocate_new_kernel_size;
+extern void relocate_new_kernel_end(void);
+
+/* Provide a dummy definition to avoid build failures. */
+static inline void crash_setup_regs(struct pt_regs *n, struct pt_regs *o)
+{
+}
+
+#endif /* _ASM_TILE_KEXEC_H */
diff --git a/arch/tile/include/asm/kmap_types.h b/arch/tile/include/asm/kmap_types.h
new file mode 100644
index 000000000000..1480106d1c05
--- /dev/null
+++ b/arch/tile/include/asm/kmap_types.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_KMAP_TYPES_H
+#define _ASM_TILE_KMAP_TYPES_H
+
+/*
+ * In TILE Linux each set of four of these uses another 16MB chunk of
+ * address space, given 64 tiles and 64KB pages, so we only enable
+ * ones that are required by the kernel configuration.
+ */
+enum km_type {
+        KM_BOUNCE_READ,
+        KM_SKB_SUNRPC_DATA,
+        KM_SKB_DATA_SOFTIRQ,
+        KM_USER0,
+        KM_USER1,
+        KM_BIO_SRC_IRQ,
+        KM_IRQ0,
+        KM_IRQ1,
+        KM_SOFTIRQ0,
+        KM_SOFTIRQ1,
+        KM_MEMCPY0,
+        KM_MEMCPY1,
+#if defined(CONFIG_HIGHPTE)
+        KM_PTE0,
+        KM_PTE1,
+#endif
+        KM_TYPE_NR
+};
+
+#endif /* _ASM_TILE_KMAP_TYPES_H */
diff --git a/arch/tile/include/asm/linkage.h b/arch/tile/include/asm/linkage.h
new file mode 100644
index 000000000000..e121c39751a7
--- /dev/null
+++ b/arch/tile/include/asm/linkage.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_LINKAGE_H
+#define _ASM_TILE_LINKAGE_H
+
+#include <feedback.h>
+
+#define __ALIGN .align 8
+
+/*
+ * The STD_ENTRY and STD_ENDPROC macros put the function in a
+ * self-named .text.foo section, and if linker feedback collection
+ * is enabled, add a suitable call to the feedback collection code.
+ * STD_ENTRY_SECTION lets you specify a non-standard section name.
+ */
+
+#define STD_ENTRY(name) \
+  .pushsection .text.##name, "ax"; \
+  ENTRY(name); \
+  FEEDBACK_ENTER(name)
+
+#define STD_ENTRY_SECTION(name, section) \
+  .pushsection section, "ax"; \
+  ENTRY(name); \
+  FEEDBACK_ENTER_EXPLICIT(name, section, .Lend_##name - name)
+
+#define STD_ENDPROC(name) \
+  ENDPROC(name); \
+  .Lend_##name:; \
+  .popsection
+
+/* Create a file-static function entry set up for feedback gathering. */
+#define STD_ENTRY_LOCAL(name) \
+  .pushsection .text.##name, "ax"; \
+  ALIGN; \
+  name:; \
+  FEEDBACK_ENTER(name)
+
+#endif /* _ASM_TILE_LINKAGE_H */
diff --git a/arch/tile/include/asm/local.h b/arch/tile/include/asm/local.h
new file mode 100644
index 000000000000..c11c530f74d0
--- /dev/null
+++ b/arch/tile/include/asm/local.h
@@ -0,0 +1 @@
+#include <asm-generic/local.h>
diff --git a/arch/tile/include/asm/memprof.h b/arch/tile/include/asm/memprof.h
new file mode 100644
index 000000000000..359949be28c1
--- /dev/null
+++ b/arch/tile/include/asm/memprof.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * The hypervisor's memory controller profiling infrastructure allows
+ * the programmer to find out what fraction of the available memory
+ * bandwidth is being consumed at each memory controller.  The
+ * profiler provides start, stop, and clear operations to allows
+ * profiling over a specific time window, as well as an interface for
+ * reading the most recent profile values.
+ *
+ * This header declares IOCTL codes necessary to control memprof.
+ */
+#ifndef _ASM_TILE_MEMPROF_H
+#define _ASM_TILE_MEMPROF_H
+
+#include <linux/ioctl.h>
+
+#define MEMPROF_IOCTL_TYPE 0xB4
+#define MEMPROF_IOCTL_START _IO(MEMPROF_IOCTL_TYPE, 0)
+#define MEMPROF_IOCTL_STOP _IO(MEMPROF_IOCTL_TYPE, 1)
+#define MEMPROF_IOCTL_CLEAR _IO(MEMPROF_IOCTL_TYPE, 2)
+
+#endif /* _ASM_TILE_MEMPROF_H */
diff --git a/arch/tile/include/asm/mman.h b/arch/tile/include/asm/mman.h
new file mode 100644
index 000000000000..4c6811e3e8dc
--- /dev/null
+++ b/arch/tile/include/asm/mman.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_MMAN_H
+#define _ASM_TILE_MMAN_H
+
+#include <asm-generic/mman-common.h>
+#include <arch/chip.h>
+
+/* Standard Linux flags */
+
+#define MAP_POPULATE    0x0040          /* populate (prefault) pagetables */
+#define MAP_NONBLOCK    0x0080          /* do not block on IO */
+#define MAP_GROWSDOWN   0x0100          /* stack-like segment */
+#define MAP_LOCKED      0x0200          /* pages are locked */
+#define MAP_NORESERVE   0x0400          /* don't check for reservations */
+#define MAP_DENYWRITE   0x0800          /* ETXTBSY */
+#define MAP_EXECUTABLE  0x1000          /* mark it as an executable */
+#define MAP_HUGETLB     0x4000          /* create a huge page mapping */
+
+
+/*
+ * Flags for mlockall
+ */
+#define MCL_CURRENT     1               /* lock all current mappings */
+#define MCL_FUTURE      2               /* lock all future mappings */
+
+
+#endif /* _ASM_TILE_MMAN_H */
diff --git a/arch/tile/include/asm/mmu.h b/arch/tile/include/asm/mmu.h
new file mode 100644
index 000000000000..92f94c77b6e4
--- /dev/null
+++ b/arch/tile/include/asm/mmu.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_MMU_H
+#define _ASM_TILE_MMU_H
+
+/* Capture any arch- and mm-specific information. */
+struct mm_context {
+        /*
+         * Written under the mmap_sem semaphore; read without the
+         * semaphore but atomically, but it is conservatively set.
+         */
+        unsigned int priority_cached;
+};
+
+typedef struct mm_context mm_context_t;
+
+void leave_mm(int cpu);
+
+#endif /* _ASM_TILE_MMU_H */
diff --git a/arch/tile/include/asm/mmu_context.h b/arch/tile/include/asm/mmu_context.h
new file mode 100644
index 000000000000..9bc0d0725c28
--- /dev/null
+++ b/arch/tile/include/asm/mmu_context.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_MMU_CONTEXT_H
+#define _ASM_TILE_MMU_CONTEXT_H
+
+#include <linux/smp.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/tlbflush.h>
+#include <asm/homecache.h>
+#include <asm-generic/mm_hooks.h>
+
+static inline int
+init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+        return 0;
+}
+
+/* Note that arch/tile/kernel/head.S also calls hv_install_context() */
+static inline void __install_page_table(pgd_t *pgdir, int asid, pgprot_t prot)
+{
+        /* FIXME: DIRECTIO should not always be set. FIXME. */
+        int rc = hv_install_context(__pa(pgdir), prot, asid, HV_CTX_DIRECTIO);
+        if (rc < 0)
+                panic("hv_install_context failed: %d", rc);
+}
+
+static inline void install_page_table(pgd_t *pgdir, int asid)
+{
+        pte_t *ptep = virt_to_pte(NULL, (unsigned long)pgdir);
+        __install_page_table(pgdir, asid, *ptep);
+}
+
+/*
+ * "Lazy" TLB mode is entered when we are switching to a kernel task,
+ * which borrows the mm of the previous task.  The goal of this
+ * optimization is to avoid having to install a new page table.  On
+ * early x86 machines (where the concept originated) you couldn't do
+ * anything short of a full page table install for invalidation, so
+ * handling a remote TLB invalidate required doing a page table
+ * re-install.  Someone clearly decided that it was silly to keep
+ * doing this while in "lazy" TLB mode, so the optimization involves
+ * installing the swapper page table instead the first time one
+ * occurs, and clearing the cpu out of cpu_vm_mask, so the cpu running
+ * the kernel task doesn't need to take any more interrupts.  At that
+ * point it's then necessary to explicitly reinstall it when context
+ * switching back to the original mm.
+ *
+ * On Tile, we have to do a page-table install whenever DMA is enabled,
+ * so in that case lazy mode doesn't help anyway.  And more generally,
+ * we have efficient per-page TLB shootdown, and don't expect to spend
+ * that much time in kernel tasks in general, so just leaving the
+ * kernel task borrowing the old page table, but handling TLB
+ * shootdowns, is a reasonable thing to do.  And importantly, this
+ * lets us use the hypervisor's internal APIs for TLB shootdown, which
+ * means we don't have to worry about having TLB shootdowns blocked
+ * when Linux is disabling interrupts; see the page migration code for
+ * an example of where it's important for TLB shootdowns to complete
+ * even when interrupts are disabled at the Linux level.
+ */
+static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *t)
+{
+#if CHIP_HAS_TILE_DMA()
+        /*
+         * We have to do an "identity" page table switch in order to
+         * clear any pending DMA interrupts.
+         */
+        if (current->thread.tile_dma_state.enabled)
+                install_page_table(mm->pgd, __get_cpu_var(current_asid));
+#endif
+}
+
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+                             struct task_struct *tsk)
+{
+        if (likely(prev != next)) {
+
+                int cpu = smp_processor_id();
+
+                /* Pick new ASID. */
+                int asid = __get_cpu_var(current_asid) + 1;
+                if (asid > max_asid) {
+                        asid = min_asid;
+                        local_flush_tlb();
+                }
+                __get_cpu_var(current_asid) = asid;
+
+                /* Clear cpu from the old mm, and set it in the new one. */
+                cpumask_clear_cpu(cpu, &prev->cpu_vm_mask);
+                cpumask_set_cpu(cpu, &next->cpu_vm_mask);
+
+                /* Re-load page tables */
+                install_page_table(next->pgd, asid);
+
+                /* See how we should set the red/black cache info */
+                check_mm_caching(prev, next);
+
+                /*
+                 * Since we're changing to a new mm, we have to flush
+                 * the icache in case some physical page now being mapped
+                 * has subsequently been repurposed and has new code.
+                 */
+                __flush_icache();
+
+        }
+}
+
+static inline void activate_mm(struct mm_struct *prev_mm,
+                               struct mm_struct *next_mm)
+{
+        switch_mm(prev_mm, next_mm, NULL);
+}
+
+#define destroy_context(mm)             do { } while (0)
+#define deactivate_mm(tsk, mm)          do { } while (0)
+
+#endif /* _ASM_TILE_MMU_CONTEXT_H */
diff --git a/arch/tile/include/asm/mmzone.h b/arch/tile/include/asm/mmzone.h
new file mode 100644
index 000000000000..c6344c4f32ac
--- /dev/null
+++ b/arch/tile/include/asm/mmzone.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_MMZONE_H
+#define _ASM_TILE_MMZONE_H
+
+extern struct pglist_data node_data[];
+#define NODE_DATA(nid)  (&node_data[nid])
+
+extern void get_memcfg_numa(void);
+
+#ifdef CONFIG_DISCONTIGMEM
+
+#include <asm/page.h>
+
+/*
+ * Generally, memory ranges are always doled out by the hypervisor in
+ * fixed-size, power-of-two increments.  That would make computing the node
+ * very easy.  We could just take a couple high bits of the PA, which
+ * denote the memory shim, and we'd be done.  However, when we're doing
+ * memory striping, this may not be true; PAs with different high bit
+ * values might be in the same node.  Thus, we keep a lookup table to
+ * translate the high bits of the PFN to the node number.
+ */
+extern int highbits_to_node[];
+
+static inline int pfn_to_nid(unsigned long pfn)
+{
+        return highbits_to_node[__pfn_to_highbits(pfn)];
+}
+
+/*
+ * Following are macros that each numa implmentation must define.
+ */
+
+#define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid)                                               \
+({                                                                      \
+        pg_data_t *__pgdat = NODE_DATA(nid);                            \
+        __pgdat->node_start_pfn + __pgdat->node_spanned_pages;          \
+})
+
+#define kern_addr_valid(kaddr)  virt_addr_valid((void *)kaddr)
+
+static inline int pfn_valid(int pfn)
+{
+        int nid = pfn_to_nid(pfn);
+
+        if (nid >= 0)
+                return (pfn < node_end_pfn(nid));
+        return 0;
+}
+
+/* Information on the NUMA nodes that we compute early */
+extern unsigned long node_start_pfn[];
+extern unsigned long node_end_pfn[];
+extern unsigned long node_memmap_pfn[];
+extern unsigned long node_percpu_pfn[];
+extern unsigned long node_free_pfn[];
+#ifdef CONFIG_HIGHMEM
+extern unsigned long node_lowmem_end_pfn[];
+#endif
+#ifdef CONFIG_PCI
+extern unsigned long pci_reserve_start_pfn;
+extern unsigned long pci_reserve_end_pfn;
+#endif
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#endif /* _ASM_TILE_MMZONE_H */
diff --git a/arch/tile/include/asm/module.h b/arch/tile/include/asm/module.h
new file mode 100644
index 000000000000..1e4b79fe8584
--- /dev/null
+++ b/arch/tile/include/asm/module.h
@@ -0,0 +1 @@
+#include <asm-generic/module.h>
diff --git a/arch/tile/include/asm/msgbuf.h b/arch/tile/include/asm/msgbuf.h
new file mode 100644
index 000000000000..809134c644a6
--- /dev/null
+++ b/arch/tile/include/asm/msgbuf.h
@@ -0,0 +1 @@
+#include <asm-generic/msgbuf.h>
diff --git a/arch/tile/include/asm/mutex.h b/arch/tile/include/asm/mutex.h
new file mode 100644
index 000000000000..ff6101aa2c71
--- /dev/null
+++ b/arch/tile/include/asm/mutex.h
@@ -0,0 +1 @@
+#include <asm-generic/mutex-dec.h>
diff --git a/arch/tile/include/asm/opcode-tile.h b/arch/tile/include/asm/opcode-tile.h
new file mode 100644
index 000000000000..ba38959137d7
--- /dev/null
+++ b/arch/tile/include/asm/opcode-tile.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_OPCODE_TILE_H
+#define _ASM_TILE_OPCODE_TILE_H
+
+#include <arch/chip.h>
+
+#if CHIP_WORD_SIZE() == 64
+#include <asm/opcode-tile_64.h>
+#else
+#include <asm/opcode-tile_32.h>
+#endif
+
+/* These definitions are not correct for TILE64, so just avoid them. */
+#undef TILE_ELF_MACHINE_CODE
+#undef TILE_ELF_NAME
+
+#endif /* _ASM_TILE_OPCODE_TILE_H */
diff --git a/arch/tile/include/asm/opcode-tile_32.h b/arch/tile/include/asm/opcode-tile_32.h
new file mode 100644
index 000000000000..eda60ecbae3d
--- /dev/null
+++ b/arch/tile/include/asm/opcode-tile_32.h
@@ -0,0 +1,1506 @@
+/* tile.h -- Header file for TILE opcode table
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   Contributed by Tilera Corp. */
+
+#ifndef opcode_tile_h
+#define opcode_tile_h
+
+typedef unsigned long long tile_bundle_bits;
+
+
+enum
+{
+  TILE_MAX_OPERANDS = 5 /* mm */
+};
+
+typedef enum
+{
+  TILE_OPC_BPT,
+  TILE_OPC_INFO,
+  TILE_OPC_INFOL,
+  TILE_OPC_J,
+  TILE_OPC_JAL,
+  TILE_OPC_MOVE,
+  TILE_OPC_MOVE_SN,
+  TILE_OPC_MOVEI,
+  TILE_OPC_MOVEI_SN,
+  TILE_OPC_MOVELI,
+  TILE_OPC_MOVELI_SN,
+  TILE_OPC_MOVELIS,
+  TILE_OPC_PREFETCH,
+  TILE_OPC_RAISE,
+  TILE_OPC_ADD,
+  TILE_OPC_ADD_SN,
+  TILE_OPC_ADDB,
+  TILE_OPC_ADDB_SN,
+  TILE_OPC_ADDBS_U,
+  TILE_OPC_ADDBS_U_SN,
+  TILE_OPC_ADDH,
+  TILE_OPC_ADDH_SN,
+  TILE_OPC_ADDHS,
+  TILE_OPC_ADDHS_SN,
+  TILE_OPC_ADDI,
+  TILE_OPC_ADDI_SN,
+  TILE_OPC_ADDIB,
+  TILE_OPC_ADDIB_SN,
+  TILE_OPC_ADDIH,
+  TILE_OPC_ADDIH_SN,
+  TILE_OPC_ADDLI,
+  TILE_OPC_ADDLI_SN,
+  TILE_OPC_ADDLIS,
+  TILE_OPC_ADDS,
+  TILE_OPC_ADDS_SN,
+  TILE_OPC_ADIFFB_U,
+  TILE_OPC_ADIFFB_U_SN,
+  TILE_OPC_ADIFFH,
+  TILE_OPC_ADIFFH_SN,
+  TILE_OPC_AND,
+  TILE_OPC_AND_SN,
+  TILE_OPC_ANDI,
+  TILE_OPC_ANDI_SN,
+  TILE_OPC_AULI,
+  TILE_OPC_AVGB_U,
+  TILE_OPC_AVGB_U_SN,
+  TILE_OPC_AVGH,
+  TILE_OPC_AVGH_SN,
+  TILE_OPC_BBNS,
+  TILE_OPC_BBNS_SN,
+  TILE_OPC_BBNST,
+  TILE_OPC_BBNST_SN,
+  TILE_OPC_BBS,
+  TILE_OPC_BBS_SN,
+  TILE_OPC_BBST,
+  TILE_OPC_BBST_SN,
+  TILE_OPC_BGEZ,
+  TILE_OPC_BGEZ_SN,
+  TILE_OPC_BGEZT,
+  TILE_OPC_BGEZT_SN,
+  TILE_OPC_BGZ,
+  TILE_OPC_BGZ_SN,
+  TILE_OPC_BGZT,
+  TILE_OPC_BGZT_SN,
+  TILE_OPC_BITX,
+  TILE_OPC_BITX_SN,
+  TILE_OPC_BLEZ,
+  TILE_OPC_BLEZ_SN,
+  TILE_OPC_BLEZT,
+  TILE_OPC_BLEZT_SN,
+  TILE_OPC_BLZ,
+  TILE_OPC_BLZ_SN,
+  TILE_OPC_BLZT,
+  TILE_OPC_BLZT_SN,
+  TILE_OPC_BNZ,
+  TILE_OPC_BNZ_SN,
+  TILE_OPC_BNZT,
+  TILE_OPC_BNZT_SN,
+  TILE_OPC_BYTEX,
+  TILE_OPC_BYTEX_SN,
+  TILE_OPC_BZ,
+  TILE_OPC_BZ_SN,
+  TILE_OPC_BZT,
+  TILE_OPC_BZT_SN,
+  TILE_OPC_CLZ,
+  TILE_OPC_CLZ_SN,
+  TILE_OPC_CRC32_32,
+  TILE_OPC_CRC32_32_SN,
+  TILE_OPC_CRC32_8,
+  TILE_OPC_CRC32_8_SN,
+  TILE_OPC_CTZ,
+  TILE_OPC_CTZ_SN,
+  TILE_OPC_DRAIN,
+  TILE_OPC_DTLBPR,
+  TILE_OPC_DWORD_ALIGN,
+  TILE_OPC_DWORD_ALIGN_SN,
+  TILE_OPC_FINV,
+  TILE_OPC_FLUSH,
+  TILE_OPC_FNOP,
+  TILE_OPC_ICOH,
+  TILE_OPC_ILL,
+  TILE_OPC_INTHB,
+  TILE_OPC_INTHB_SN,
+  TILE_OPC_INTHH,
+  TILE_OPC_INTHH_SN,
+  TILE_OPC_INTLB,
+  TILE_OPC_INTLB_SN,
+  TILE_OPC_INTLH,
+  TILE_OPC_INTLH_SN,
+  TILE_OPC_INV,
+  TILE_OPC_IRET,
+  TILE_OPC_JALB,
+  TILE_OPC_JALF,
+  TILE_OPC_JALR,
+  TILE_OPC_JALRP,
+  TILE_OPC_JB,
+  TILE_OPC_JF,
+  TILE_OPC_JR,
+  TILE_OPC_JRP,
+  TILE_OPC_LB,
+  TILE_OPC_LB_SN,
+  TILE_OPC_LB_U,
+  TILE_OPC_LB_U_SN,
+  TILE_OPC_LBADD,
+  TILE_OPC_LBADD_SN,
+  TILE_OPC_LBADD_U,
+  TILE_OPC_LBADD_U_SN,
+  TILE_OPC_LH,
+  TILE_OPC_LH_SN,
+  TILE_OPC_LH_U,
+  TILE_OPC_LH_U_SN,
+  TILE_OPC_LHADD,
+  TILE_OPC_LHADD_SN,
+  TILE_OPC_LHADD_U,
+  TILE_OPC_LHADD_U_SN,
+  TILE_OPC_LNK,
+  TILE_OPC_LNK_SN,
+  TILE_OPC_LW,
+  TILE_OPC_LW_SN,
+  TILE_OPC_LW_NA,
+  TILE_OPC_LW_NA_SN,
+  TILE_OPC_LWADD,
+  TILE_OPC_LWADD_SN,
+  TILE_OPC_LWADD_NA,
+  TILE_OPC_LWADD_NA_SN,
+  TILE_OPC_MAXB_U,
+  TILE_OPC_MAXB_U_SN,
+  TILE_OPC_MAXH,
+  TILE_OPC_MAXH_SN,
+  TILE_OPC_MAXIB_U,
+  TILE_OPC_MAXIB_U_SN,
+  TILE_OPC_MAXIH,
+  TILE_OPC_MAXIH_SN,
+  TILE_OPC_MF,
+  TILE_OPC_MFSPR,
+  TILE_OPC_MINB_U,
+  TILE_OPC_MINB_U_SN,
+  TILE_OPC_MINH,
+  TILE_OPC_MINH_SN,
+  TILE_OPC_MINIB_U,
+  TILE_OPC_MINIB_U_SN,
+  TILE_OPC_MINIH,
+  TILE_OPC_MINIH_SN,
+  TILE_OPC_MM,
+  TILE_OPC_MNZ,
+  TILE_OPC_MNZ_SN,
+  TILE_OPC_MNZB,
+  TILE_OPC_MNZB_SN,
+  TILE_OPC_MNZH,
+  TILE_OPC_MNZH_SN,
+  TILE_OPC_MTSPR,
+  TILE_OPC_MULHH_SS,
+  TILE_OPC_MULHH_SS_SN,
+  TILE_OPC_MULHH_SU,
+  TILE_OPC_MULHH_SU_SN,
+  TILE_OPC_MULHH_UU,
+  TILE_OPC_MULHH_UU_SN,
+  TILE_OPC_MULHHA_SS,
+  TILE_OPC_MULHHA_SS_SN,
+  TILE_OPC_MULHHA_SU,
+  TILE_OPC_MULHHA_SU_SN,
+  TILE_OPC_MULHHA_UU,
+  TILE_OPC_MULHHA_UU_SN,
+  TILE_OPC_MULHHSA_UU,
+  TILE_OPC_MULHHSA_UU_SN,
+  TILE_OPC_MULHL_SS,
+  TILE_OPC_MULHL_SS_SN,
+  TILE_OPC_MULHL_SU,
+  TILE_OPC_MULHL_SU_SN,
+  TILE_OPC_MULHL_US,
+  TILE_OPC_MULHL_US_SN,
+  TILE_OPC_MULHL_UU,
+  TILE_OPC_MULHL_UU_SN,
+  TILE_OPC_MULHLA_SS,
+  TILE_OPC_MULHLA_SS_SN,
+  TILE_OPC_MULHLA_SU,
+  TILE_OPC_MULHLA_SU_SN,
+  TILE_OPC_MULHLA_US,
+  TILE_OPC_MULHLA_US_SN,
+  TILE_OPC_MULHLA_UU,
+  TILE_OPC_MULHLA_UU_SN,
+  TILE_OPC_MULHLSA_UU,
+  TILE_OPC_MULHLSA_UU_SN,
+  TILE_OPC_MULLL_SS,
+  TILE_OPC_MULLL_SS_SN,
+  TILE_OPC_MULLL_SU,
+  TILE_OPC_MULLL_SU_SN,
+  TILE_OPC_MULLL_UU,
+  TILE_OPC_MULLL_UU_SN,
+  TILE_OPC_MULLLA_SS,
+  TILE_OPC_MULLLA_SS_SN,
+  TILE_OPC_MULLLA_SU,
+  TILE_OPC_MULLLA_SU_SN,
+  TILE_OPC_MULLLA_UU,
+  TILE_OPC_MULLLA_UU_SN,
+  TILE_OPC_MULLLSA_UU,
+  TILE_OPC_MULLLSA_UU_SN,
+  TILE_OPC_MVNZ,
+  TILE_OPC_MVNZ_SN,
+  TILE_OPC_MVZ,
+  TILE_OPC_MVZ_SN,
+  TILE_OPC_MZ,
+  TILE_OPC_MZ_SN,
+  TILE_OPC_MZB,
+  TILE_OPC_MZB_SN,
+  TILE_OPC_MZH,
+  TILE_OPC_MZH_SN,
+  TILE_OPC_NAP,
+  TILE_OPC_NOP,
+  TILE_OPC_NOR,
+  TILE_OPC_NOR_SN,
+  TILE_OPC_OR,
+  TILE_OPC_OR_SN,
+  TILE_OPC_ORI,
+  TILE_OPC_ORI_SN,
+  TILE_OPC_PACKBS_U,
+  TILE_OPC_PACKBS_U_SN,
+  TILE_OPC_PACKHB,
+  TILE_OPC_PACKHB_SN,
+  TILE_OPC_PACKHS,
+  TILE_OPC_PACKHS_SN,
+  TILE_OPC_PACKLB,
+  TILE_OPC_PACKLB_SN,
+  TILE_OPC_PCNT,
+  TILE_OPC_PCNT_SN,
+  TILE_OPC_RL,
+  TILE_OPC_RL_SN,
+  TILE_OPC_RLI,
+  TILE_OPC_RLI_SN,
+  TILE_OPC_S1A,
+  TILE_OPC_S1A_SN,
+  TILE_OPC_S2A,
+  TILE_OPC_S2A_SN,
+  TILE_OPC_S3A,
+  TILE_OPC_S3A_SN,
+  TILE_OPC_SADAB_U,
+  TILE_OPC_SADAB_U_SN,
+  TILE_OPC_SADAH,
+  TILE_OPC_SADAH_SN,
+  TILE_OPC_SADAH_U,
+  TILE_OPC_SADAH_U_SN,
+  TILE_OPC_SADB_U,
+  TILE_OPC_SADB_U_SN,
+  TILE_OPC_SADH,
+  TILE_OPC_SADH_SN,
+  TILE_OPC_SADH_U,
+  TILE_OPC_SADH_U_SN,
+  TILE_OPC_SB,
+  TILE_OPC_SBADD,
+  TILE_OPC_SEQ,
+  TILE_OPC_SEQ_SN,
+  TILE_OPC_SEQB,
+  TILE_OPC_SEQB_SN,
+  TILE_OPC_SEQH,
+  TILE_OPC_SEQH_SN,
+  TILE_OPC_SEQI,
+  TILE_OPC_SEQI_SN,
+  TILE_OPC_SEQIB,
+  TILE_OPC_SEQIB_SN,
+  TILE_OPC_SEQIH,
+  TILE_OPC_SEQIH_SN,
+  TILE_OPC_SH,
+  TILE_OPC_SHADD,
+  TILE_OPC_SHL,
+  TILE_OPC_SHL_SN,
+  TILE_OPC_SHLB,
+  TILE_OPC_SHLB_SN,
+  TILE_OPC_SHLH,
+  TILE_OPC_SHLH_SN,
+  TILE_OPC_SHLI,
+  TILE_OPC_SHLI_SN,
+  TILE_OPC_SHLIB,
+  TILE_OPC_SHLIB_SN,
+  TILE_OPC_SHLIH,
+  TILE_OPC_SHLIH_SN,
+  TILE_OPC_SHR,
+  TILE_OPC_SHR_SN,
+  TILE_OPC_SHRB,
+  TILE_OPC_SHRB_SN,
+  TILE_OPC_SHRH,
+  TILE_OPC_SHRH_SN,
+  TILE_OPC_SHRI,
+  TILE_OPC_SHRI_SN,
+  TILE_OPC_SHRIB,
+  TILE_OPC_SHRIB_SN,
+  TILE_OPC_SHRIH,
+  TILE_OPC_SHRIH_SN,
+  TILE_OPC_SLT,
+  TILE_OPC_SLT_SN,
+  TILE_OPC_SLT_U,
+  TILE_OPC_SLT_U_SN,
+  TILE_OPC_SLTB,
+  TILE_OPC_SLTB_SN,
+  TILE_OPC_SLTB_U,
+  TILE_OPC_SLTB_U_SN,
+  TILE_OPC_SLTE,
+  TILE_OPC_SLTE_SN,
+  TILE_OPC_SLTE_U,
+  TILE_OPC_SLTE_U_SN,
+  TILE_OPC_SLTEB,
+  TILE_OPC_SLTEB_SN,
+  TILE_OPC_SLTEB_U,
+  TILE_OPC_SLTEB_U_SN,
+  TILE_OPC_SLTEH,
+  TILE_OPC_SLTEH_SN,
+  TILE_OPC_SLTEH_U,
+  TILE_OPC_SLTEH_U_SN,
+  TILE_OPC_SLTH,
+  TILE_OPC_SLTH_SN,
+  TILE_OPC_SLTH_U,
+  TILE_OPC_SLTH_U_SN,
+  TILE_OPC_SLTI,
+  TILE_OPC_SLTI_SN,
+  TILE_OPC_SLTI_U,
+  TILE_OPC_SLTI_U_SN,
+  TILE_OPC_SLTIB,
+  TILE_OPC_SLTIB_SN,
+  TILE_OPC_SLTIB_U,
+  TILE_OPC_SLTIB_U_SN,
+  TILE_OPC_SLTIH,
+  TILE_OPC_SLTIH_SN,
+  TILE_OPC_SLTIH_U,
+  TILE_OPC_SLTIH_U_SN,
+  TILE_OPC_SNE,
+  TILE_OPC_SNE_SN,
+  TILE_OPC_SNEB,
+  TILE_OPC_SNEB_SN,
+  TILE_OPC_SNEH,
+  TILE_OPC_SNEH_SN,
+  TILE_OPC_SRA,
+  TILE_OPC_SRA_SN,
+  TILE_OPC_SRAB,
+  TILE_OPC_SRAB_SN,
+  TILE_OPC_SRAH,
+  TILE_OPC_SRAH_SN,
+  TILE_OPC_SRAI,
+  TILE_OPC_SRAI_SN,
+  TILE_OPC_SRAIB,
+  TILE_OPC_SRAIB_SN,
+  TILE_OPC_SRAIH,
+  TILE_OPC_SRAIH_SN,
+  TILE_OPC_SUB,
+  TILE_OPC_SUB_SN,
+  TILE_OPC_SUBB,
+  TILE_OPC_SUBB_SN,
+  TILE_OPC_SUBBS_U,
+  TILE_OPC_SUBBS_U_SN,
+  TILE_OPC_SUBH,
+  TILE_OPC_SUBH_SN,
+  TILE_OPC_SUBHS,
+  TILE_OPC_SUBHS_SN,
+  TILE_OPC_SUBS,
+  TILE_OPC_SUBS_SN,
+  TILE_OPC_SW,
+  TILE_OPC_SWADD,
+  TILE_OPC_SWINT0,
+  TILE_OPC_SWINT1,
+  TILE_OPC_SWINT2,
+  TILE_OPC_SWINT3,
+  TILE_OPC_TBLIDXB0,
+  TILE_OPC_TBLIDXB0_SN,
+  TILE_OPC_TBLIDXB1,
+  TILE_OPC_TBLIDXB1_SN,
+  TILE_OPC_TBLIDXB2,
+  TILE_OPC_TBLIDXB2_SN,
+  TILE_OPC_TBLIDXB3,
+  TILE_OPC_TBLIDXB3_SN,
+  TILE_OPC_TNS,
+  TILE_OPC_TNS_SN,
+  TILE_OPC_WH64,
+  TILE_OPC_XOR,
+  TILE_OPC_XOR_SN,
+  TILE_OPC_XORI,
+  TILE_OPC_XORI_SN,
+  TILE_OPC_NONE
+} tile_mnemonic;
+
+/* 64-bit pattern for a { bpt ; nop } bundle. */
+#define TILE_BPT_BUNDLE 0x400b3cae70166000ULL
+
+
+#define TILE_ELF_MACHINE_CODE EM_TILEPRO
+
+#define TILE_ELF_NAME "elf32-tilepro"
+
+
+static __inline unsigned int
+get_BrOff_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_BrOff_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000);
+}
+
+static __inline unsigned int
+get_BrType_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0xf);
+}
+
+static __inline unsigned int
+get_Dest_Imm8_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x0000003f) |
+         (((unsigned int)(n >> 43)) & 0x000000c0);
+}
+
+static __inline unsigned int
+get_Dest_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 2)) & 0x3);
+}
+
+static __inline unsigned int
+get_Dest_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Imm16_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xffff);
+}
+
+static __inline unsigned int
+get_Imm16_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xffff);
+}
+
+static __inline unsigned int
+get_Imm8_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xff);
+}
+
+static __inline unsigned int
+get_ImmOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 20)) & 0x7f);
+}
+
+static __inline unsigned int
+get_ImmOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 51)) & 0x7f);
+}
+
+static __inline unsigned int
+get_ImmRROpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 8)) & 0x3);
+}
+
+static __inline unsigned int
+get_JOffLong_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000) |
+         (((unsigned int)(n >> 14)) & 0x001e0000) |
+         (((unsigned int)(n >> 16)) & 0x07e00000) |
+         (((unsigned int)(n >> 31)) & 0x18000000);
+}
+
+static __inline unsigned int
+get_JOff_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000) |
+         (((unsigned int)(n >> 14)) & 0x001e0000) |
+         (((unsigned int)(n >> 16)) & 0x07e00000) |
+         (((unsigned int)(n >> 31)) & 0x08000000);
+}
+
+static __inline unsigned int
+get_MF_Imm15_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x00003fff) |
+         (((unsigned int)(n >> 44)) & 0x00004000);
+}
+
+static __inline unsigned int
+get_MMEnd_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMEnd_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMStart_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 23)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMStart_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 54)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MT_Imm15_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x0000003f) |
+         (((unsigned int)(n >> 37)) & 0x00003fc0) |
+         (((unsigned int)(n >> 44)) & 0x00004000);
+}
+
+static __inline unsigned int
+get_Mode(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 63)) & 0x1);
+}
+
+static __inline unsigned int
+get_NoRegOpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 10)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Opcode_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 28)) & 0x7);
+}
+
+static __inline unsigned int
+get_Opcode_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 59)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 27)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 59)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y2(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 56)) & 0x7);
+}
+
+static __inline unsigned int
+get_RROpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 4)) & 0xf);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x1ff);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x1ff);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x3);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x3);
+}
+
+static __inline unsigned int
+get_RouteOpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_S_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 27)) & 0x1);
+}
+
+static __inline unsigned int
+get_S_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 58)) & 0x1);
+}
+
+static __inline unsigned int
+get_ShAmt_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_SrcA_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 6)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 6)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y2(tile_bundle_bits n)
+{
+  return (((n >> 26)) & 0x00000001) |
+         (((unsigned int)(n >> 50)) & 0x0000003e);
+}
+
+static __inline unsigned int
+get_SrcBDest_Y2(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 20)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Src_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 17)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 48)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 17)) & 0x7);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 48)) & 0x7);
+}
+
+
+static __inline int
+sign_extend(int n, int num_bits)
+{
+  int shift = (int)(sizeof(int) * 8 - num_bits);
+  return (n << shift) >> shift;
+}
+
+
+
+static __inline tile_bundle_bits
+create_BrOff_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_BrOff_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20);
+}
+
+static __inline tile_bundle_bits
+create_BrType_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Imm8_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x0000003f)) << 31) |
+         (((tile_bundle_bits)(n & 0x000000c0)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Dest_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 2);
+}
+
+static __inline tile_bundle_bits
+create_Dest_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Dest_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Imm16_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xffff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm16_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xffff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_ImmOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7f) << 20);
+}
+
+static __inline tile_bundle_bits
+create_ImmOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7f)) << 51);
+}
+
+static __inline tile_bundle_bits
+create_ImmRROpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 8);
+}
+
+static __inline tile_bundle_bits
+create_JOffLong_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20) |
+         (((tile_bundle_bits)(n & 0x001e0000)) << 14) |
+         (((tile_bundle_bits)(n & 0x07e00000)) << 16) |
+         (((tile_bundle_bits)(n & 0x18000000)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_JOff_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20) |
+         (((tile_bundle_bits)(n & 0x001e0000)) << 14) |
+         (((tile_bundle_bits)(n & 0x07e00000)) << 16) |
+         (((tile_bundle_bits)(n & 0x08000000)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_MF_Imm15_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00003fff)) << 37) |
+         (((tile_bundle_bits)(n & 0x00004000)) << 44);
+}
+
+static __inline tile_bundle_bits
+create_MMEnd_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 18);
+}
+
+static __inline tile_bundle_bits
+create_MMEnd_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_MMStart_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 23);
+}
+
+static __inline tile_bundle_bits
+create_MMStart_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 54);
+}
+
+static __inline tile_bundle_bits
+create_MT_Imm15_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x0000003f)) << 31) |
+         (((tile_bundle_bits)(n & 0x00003fc0)) << 37) |
+         (((tile_bundle_bits)(n & 0x00004000)) << 44);
+}
+
+static __inline tile_bundle_bits
+create_Mode(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1)) << 63);
+}
+
+static __inline tile_bundle_bits
+create_NoRegOpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 10);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7) << 28);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 59);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 27);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 59);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7)) << 56);
+}
+
+static __inline tile_bundle_bits
+create_RROpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 4);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1ff) << 18);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1ff)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 18);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_RouteOpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_S_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1) << 27);
+}
+
+static __inline tile_bundle_bits
+create_S_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1)) << 58);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 6);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 37);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 6);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 37);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x00000001) << 26) |
+         (((tile_bundle_bits)(n & 0x0000003e)) << 50);
+}
+
+static __inline tile_bundle_bits
+create_SrcBDest_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 20);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Src_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 0);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 17);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3ff)) << 48);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7) << 17);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7)) << 48);
+}
+
+
+
+typedef enum
+{
+  TILE_PIPELINE_X0,
+  TILE_PIPELINE_X1,
+  TILE_PIPELINE_Y0,
+  TILE_PIPELINE_Y1,
+  TILE_PIPELINE_Y2,
+} tile_pipeline;
+
+#define tile_is_x_pipeline(p) ((int)(p) <= (int)TILE_PIPELINE_X1)
+
+typedef enum
+{
+  TILE_OP_TYPE_REGISTER,
+  TILE_OP_TYPE_IMMEDIATE,
+  TILE_OP_TYPE_ADDRESS,
+  TILE_OP_TYPE_SPR
+} tile_operand_type;
+
+/* This is the bit that determines if a bundle is in the Y encoding. */
+#define TILE_BUNDLE_Y_ENCODING_MASK ((tile_bundle_bits)1 << 63)
+
+enum
+{
+  /* Maximum number of instructions in a bundle (2 for X, 3 for Y). */
+  TILE_MAX_INSTRUCTIONS_PER_BUNDLE = 3,
+
+  /* How many different pipeline encodings are there? X0, X1, Y0, Y1, Y2. */
+  TILE_NUM_PIPELINE_ENCODINGS = 5,
+
+  /* Log base 2 of TILE_BUNDLE_SIZE_IN_BYTES. */
+  TILE_LOG2_BUNDLE_SIZE_IN_BYTES = 3,
+
+  /* Instructions take this many bytes. */
+  TILE_BUNDLE_SIZE_IN_BYTES = 1 << TILE_LOG2_BUNDLE_SIZE_IN_BYTES,
+
+  /* Log base 2 of TILE_BUNDLE_ALIGNMENT_IN_BYTES. */
+  TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES = 3,
+
+  /* Bundles should be aligned modulo this number of bytes. */
+  TILE_BUNDLE_ALIGNMENT_IN_BYTES =
+    (1 << TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES),
+
+  /* Log base 2 of TILE_SN_INSTRUCTION_SIZE_IN_BYTES. */
+  TILE_LOG2_SN_INSTRUCTION_SIZE_IN_BYTES = 1,
+
+  /* Static network instructions take this many bytes. */
+  TILE_SN_INSTRUCTION_SIZE_IN_BYTES =
+    (1 << TILE_LOG2_SN_INSTRUCTION_SIZE_IN_BYTES),
+
+  /* Number of registers (some are magic, such as network I/O). */
+  TILE_NUM_REGISTERS = 64,
+
+  /* Number of static network registers. */
+  TILE_NUM_SN_REGISTERS = 4
+};
+
+
+struct tile_operand
+{
+  /* Is this operand a register, immediate or address? */
+  tile_operand_type type;
+
+  /* The default relocation type for this operand.  */
+  signed int default_reloc : 16;
+
+  /* How many bits is this value? (used for range checking) */
+  unsigned int num_bits : 5;
+
+  /* Is the value signed? (used for range checking) */
+  unsigned int is_signed : 1;
+
+  /* Is this operand a source register? */
+  unsigned int is_src_reg : 1;
+
+  /* Is this operand written? (i.e. is it a destination register) */
+  unsigned int is_dest_reg : 1;
+
+  /* Is this operand PC-relative? */
+  unsigned int is_pc_relative : 1;
+
+  /* By how many bits do we right shift the value before inserting? */
+  unsigned int rightshift : 2;
+
+  /* Return the bits for this operand to be ORed into an existing bundle. */
+  tile_bundle_bits (*insert) (int op);
+
+  /* Extract this operand and return it. */
+  unsigned int (*extract) (tile_bundle_bits bundle);
+};
+
+
+extern const struct tile_operand tile_operands[];
+
+/* One finite-state machine per pipe for rapid instruction decoding. */
+extern const unsigned short * const
+tile_bundle_decoder_fsms[TILE_NUM_PIPELINE_ENCODINGS];
+
+
+struct tile_opcode
+{
+  /* The opcode mnemonic, e.g. "add" */
+  const char *name;
+
+  /* The enum value for this mnemonic. */
+  tile_mnemonic mnemonic;
+
+  /* A bit mask of which of the five pipes this instruction
+     is compatible with:
+     X0  0x01
+     X1  0x02
+     Y0  0x04
+     Y1  0x08
+     Y2  0x10 */
+  unsigned char pipes;
+
+  /* How many operands are there? */
+  unsigned char num_operands;
+
+  /* Which register does this write implicitly, or TREG_ZERO if none? */
+  unsigned char implicitly_written_register;
+
+  /* Can this be bundled with other instructions (almost always true). */
+  unsigned char can_bundle;
+
+  /* The description of the operands. Each of these is an
+   * index into the tile_operands[] table. */
+  unsigned char operands[TILE_NUM_PIPELINE_ENCODINGS][TILE_MAX_OPERANDS];
+
+};
+
+extern const struct tile_opcode tile_opcodes[];
+
+
+/* Used for non-textual disassembly into structs. */
+struct tile_decoded_instruction
+{
+  const struct tile_opcode *opcode;
+  const struct tile_operand *operands[TILE_MAX_OPERANDS];
+  int operand_values[TILE_MAX_OPERANDS];
+};
+
+
+/* Disassemble a bundle into a struct for machine processing. */
+extern int parse_insn_tile(tile_bundle_bits bits,
+                           unsigned int pc,
+                           struct tile_decoded_instruction
+                           decoded[TILE_MAX_INSTRUCTIONS_PER_BUNDLE]);
+
+
+
+#endif /* opcode_tile_h */
diff --git a/arch/tile/include/asm/opcode-tile_64.h b/arch/tile/include/asm/opcode-tile_64.h
new file mode 100644
index 000000000000..eda60ecbae3d
--- /dev/null
+++ b/arch/tile/include/asm/opcode-tile_64.h
@@ -0,0 +1,1506 @@
+/* tile.h -- Header file for TILE opcode table
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   Contributed by Tilera Corp. */
+
+#ifndef opcode_tile_h
+#define opcode_tile_h
+
+typedef unsigned long long tile_bundle_bits;
+
+
+enum
+{
+  TILE_MAX_OPERANDS = 5 /* mm */
+};
+
+typedef enum
+{
+  TILE_OPC_BPT,
+  TILE_OPC_INFO,
+  TILE_OPC_INFOL,
+  TILE_OPC_J,
+  TILE_OPC_JAL,
+  TILE_OPC_MOVE,
+  TILE_OPC_MOVE_SN,
+  TILE_OPC_MOVEI,
+  TILE_OPC_MOVEI_SN,
+  TILE_OPC_MOVELI,
+  TILE_OPC_MOVELI_SN,
+  TILE_OPC_MOVELIS,
+  TILE_OPC_PREFETCH,
+  TILE_OPC_RAISE,
+  TILE_OPC_ADD,
+  TILE_OPC_ADD_SN,
+  TILE_OPC_ADDB,
+  TILE_OPC_ADDB_SN,
+  TILE_OPC_ADDBS_U,
+  TILE_OPC_ADDBS_U_SN,
+  TILE_OPC_ADDH,
+  TILE_OPC_ADDH_SN,
+  TILE_OPC_ADDHS,
+  TILE_OPC_ADDHS_SN,
+  TILE_OPC_ADDI,
+  TILE_OPC_ADDI_SN,
+  TILE_OPC_ADDIB,
+  TILE_OPC_ADDIB_SN,
+  TILE_OPC_ADDIH,
+  TILE_OPC_ADDIH_SN,
+  TILE_OPC_ADDLI,
+  TILE_OPC_ADDLI_SN,
+  TILE_OPC_ADDLIS,
+  TILE_OPC_ADDS,
+  TILE_OPC_ADDS_SN,
+  TILE_OPC_ADIFFB_U,
+  TILE_OPC_ADIFFB_U_SN,
+  TILE_OPC_ADIFFH,
+  TILE_OPC_ADIFFH_SN,
+  TILE_OPC_AND,
+  TILE_OPC_AND_SN,
+  TILE_OPC_ANDI,
+  TILE_OPC_ANDI_SN,
+  TILE_OPC_AULI,
+  TILE_OPC_AVGB_U,
+  TILE_OPC_AVGB_U_SN,
+  TILE_OPC_AVGH,
+  TILE_OPC_AVGH_SN,
+  TILE_OPC_BBNS,
+  TILE_OPC_BBNS_SN,
+  TILE_OPC_BBNST,
+  TILE_OPC_BBNST_SN,
+  TILE_OPC_BBS,
+  TILE_OPC_BBS_SN,
+  TILE_OPC_BBST,
+  TILE_OPC_BBST_SN,
+  TILE_OPC_BGEZ,
+  TILE_OPC_BGEZ_SN,
+  TILE_OPC_BGEZT,
+  TILE_OPC_BGEZT_SN,
+  TILE_OPC_BGZ,
+  TILE_OPC_BGZ_SN,
+  TILE_OPC_BGZT,
+  TILE_OPC_BGZT_SN,
+  TILE_OPC_BITX,
+  TILE_OPC_BITX_SN,
+  TILE_OPC_BLEZ,
+  TILE_OPC_BLEZ_SN,
+  TILE_OPC_BLEZT,
+  TILE_OPC_BLEZT_SN,
+  TILE_OPC_BLZ,
+  TILE_OPC_BLZ_SN,
+  TILE_OPC_BLZT,
+  TILE_OPC_BLZT_SN,
+  TILE_OPC_BNZ,
+  TILE_OPC_BNZ_SN,
+  TILE_OPC_BNZT,
+  TILE_OPC_BNZT_SN,
+  TILE_OPC_BYTEX,
+  TILE_OPC_BYTEX_SN,
+  TILE_OPC_BZ,
+  TILE_OPC_BZ_SN,
+  TILE_OPC_BZT,
+  TILE_OPC_BZT_SN,
+  TILE_OPC_CLZ,
+  TILE_OPC_CLZ_SN,
+  TILE_OPC_CRC32_32,
+  TILE_OPC_CRC32_32_SN,
+  TILE_OPC_CRC32_8,
+  TILE_OPC_CRC32_8_SN,
+  TILE_OPC_CTZ,
+  TILE_OPC_CTZ_SN,
+  TILE_OPC_DRAIN,
+  TILE_OPC_DTLBPR,
+  TILE_OPC_DWORD_ALIGN,
+  TILE_OPC_DWORD_ALIGN_SN,
+  TILE_OPC_FINV,
+  TILE_OPC_FLUSH,
+  TILE_OPC_FNOP,
+  TILE_OPC_ICOH,
+  TILE_OPC_ILL,
+  TILE_OPC_INTHB,
+  TILE_OPC_INTHB_SN,
+  TILE_OPC_INTHH,
+  TILE_OPC_INTHH_SN,
+  TILE_OPC_INTLB,
+  TILE_OPC_INTLB_SN,
+  TILE_OPC_INTLH,
+  TILE_OPC_INTLH_SN,
+  TILE_OPC_INV,
+  TILE_OPC_IRET,
+  TILE_OPC_JALB,
+  TILE_OPC_JALF,
+  TILE_OPC_JALR,
+  TILE_OPC_JALRP,
+  TILE_OPC_JB,
+  TILE_OPC_JF,
+  TILE_OPC_JR,
+  TILE_OPC_JRP,
+  TILE_OPC_LB,
+  TILE_OPC_LB_SN,
+  TILE_OPC_LB_U,
+  TILE_OPC_LB_U_SN,
+  TILE_OPC_LBADD,
+  TILE_OPC_LBADD_SN,
+  TILE_OPC_LBADD_U,
+  TILE_OPC_LBADD_U_SN,
+  TILE_OPC_LH,
+  TILE_OPC_LH_SN,
+  TILE_OPC_LH_U,
+  TILE_OPC_LH_U_SN,
+  TILE_OPC_LHADD,
+  TILE_OPC_LHADD_SN,
+  TILE_OPC_LHADD_U,
+  TILE_OPC_LHADD_U_SN,
+  TILE_OPC_LNK,
+  TILE_OPC_LNK_SN,
+  TILE_OPC_LW,
+  TILE_OPC_LW_SN,
+  TILE_OPC_LW_NA,
+  TILE_OPC_LW_NA_SN,
+  TILE_OPC_LWADD,
+  TILE_OPC_LWADD_SN,
+  TILE_OPC_LWADD_NA,
+  TILE_OPC_LWADD_NA_SN,
+  TILE_OPC_MAXB_U,
+  TILE_OPC_MAXB_U_SN,
+  TILE_OPC_MAXH,
+  TILE_OPC_MAXH_SN,
+  TILE_OPC_MAXIB_U,
+  TILE_OPC_MAXIB_U_SN,
+  TILE_OPC_MAXIH,
+  TILE_OPC_MAXIH_SN,
+  TILE_OPC_MF,
+  TILE_OPC_MFSPR,
+  TILE_OPC_MINB_U,
+  TILE_OPC_MINB_U_SN,
+  TILE_OPC_MINH,
+  TILE_OPC_MINH_SN,
+  TILE_OPC_MINIB_U,
+  TILE_OPC_MINIB_U_SN,
+  TILE_OPC_MINIH,
+  TILE_OPC_MINIH_SN,
+  TILE_OPC_MM,
+  TILE_OPC_MNZ,
+  TILE_OPC_MNZ_SN,
+  TILE_OPC_MNZB,
+  TILE_OPC_MNZB_SN,
+  TILE_OPC_MNZH,
+  TILE_OPC_MNZH_SN,
+  TILE_OPC_MTSPR,
+  TILE_OPC_MULHH_SS,
+  TILE_OPC_MULHH_SS_SN,
+  TILE_OPC_MULHH_SU,
+  TILE_OPC_MULHH_SU_SN,
+  TILE_OPC_MULHH_UU,
+  TILE_OPC_MULHH_UU_SN,
+  TILE_OPC_MULHHA_SS,
+  TILE_OPC_MULHHA_SS_SN,
+  TILE_OPC_MULHHA_SU,
+  TILE_OPC_MULHHA_SU_SN,
+  TILE_OPC_MULHHA_UU,
+  TILE_OPC_MULHHA_UU_SN,
+  TILE_OPC_MULHHSA_UU,
+  TILE_OPC_MULHHSA_UU_SN,
+  TILE_OPC_MULHL_SS,
+  TILE_OPC_MULHL_SS_SN,
+  TILE_OPC_MULHL_SU,
+  TILE_OPC_MULHL_SU_SN,
+  TILE_OPC_MULHL_US,
+  TILE_OPC_MULHL_US_SN,
+  TILE_OPC_MULHL_UU,
+  TILE_OPC_MULHL_UU_SN,
+  TILE_OPC_MULHLA_SS,
+  TILE_OPC_MULHLA_SS_SN,
+  TILE_OPC_MULHLA_SU,
+  TILE_OPC_MULHLA_SU_SN,
+  TILE_OPC_MULHLA_US,
+  TILE_OPC_MULHLA_US_SN,
+  TILE_OPC_MULHLA_UU,
+  TILE_OPC_MULHLA_UU_SN,
+  TILE_OPC_MULHLSA_UU,
+  TILE_OPC_MULHLSA_UU_SN,
+  TILE_OPC_MULLL_SS,
+  TILE_OPC_MULLL_SS_SN,
+  TILE_OPC_MULLL_SU,
+  TILE_OPC_MULLL_SU_SN,
+  TILE_OPC_MULLL_UU,
+  TILE_OPC_MULLL_UU_SN,
+  TILE_OPC_MULLLA_SS,
+  TILE_OPC_MULLLA_SS_SN,
+  TILE_OPC_MULLLA_SU,
+  TILE_OPC_MULLLA_SU_SN,
+  TILE_OPC_MULLLA_UU,
+  TILE_OPC_MULLLA_UU_SN,
+  TILE_OPC_MULLLSA_UU,
+  TILE_OPC_MULLLSA_UU_SN,
+  TILE_OPC_MVNZ,
+  TILE_OPC_MVNZ_SN,
+  TILE_OPC_MVZ,
+  TILE_OPC_MVZ_SN,
+  TILE_OPC_MZ,
+  TILE_OPC_MZ_SN,
+  TILE_OPC_MZB,
+  TILE_OPC_MZB_SN,
+  TILE_OPC_MZH,
+  TILE_OPC_MZH_SN,
+  TILE_OPC_NAP,
+  TILE_OPC_NOP,
+  TILE_OPC_NOR,
+  TILE_OPC_NOR_SN,
+  TILE_OPC_OR,
+  TILE_OPC_OR_SN,
+  TILE_OPC_ORI,
+  TILE_OPC_ORI_SN,
+  TILE_OPC_PACKBS_U,
+  TILE_OPC_PACKBS_U_SN,
+  TILE_OPC_PACKHB,
+  TILE_OPC_PACKHB_SN,
+  TILE_OPC_PACKHS,
+  TILE_OPC_PACKHS_SN,
+  TILE_OPC_PACKLB,
+  TILE_OPC_PACKLB_SN,
+  TILE_OPC_PCNT,
+  TILE_OPC_PCNT_SN,
+  TILE_OPC_RL,
+  TILE_OPC_RL_SN,
+  TILE_OPC_RLI,
+  TILE_OPC_RLI_SN,
+  TILE_OPC_S1A,
+  TILE_OPC_S1A_SN,
+  TILE_OPC_S2A,
+  TILE_OPC_S2A_SN,
+  TILE_OPC_S3A,
+  TILE_OPC_S3A_SN,
+  TILE_OPC_SADAB_U,
+  TILE_OPC_SADAB_U_SN,
+  TILE_OPC_SADAH,
+  TILE_OPC_SADAH_SN,
+  TILE_OPC_SADAH_U,
+  TILE_OPC_SADAH_U_SN,
+  TILE_OPC_SADB_U,
+  TILE_OPC_SADB_U_SN,
+  TILE_OPC_SADH,
+  TILE_OPC_SADH_SN,
+  TILE_OPC_SADH_U,
+  TILE_OPC_SADH_U_SN,
+  TILE_OPC_SB,
+  TILE_OPC_SBADD,
+  TILE_OPC_SEQ,
+  TILE_OPC_SEQ_SN,
+  TILE_OPC_SEQB,
+  TILE_OPC_SEQB_SN,
+  TILE_OPC_SEQH,
+  TILE_OPC_SEQH_SN,
+  TILE_OPC_SEQI,
+  TILE_OPC_SEQI_SN,
+  TILE_OPC_SEQIB,
+  TILE_OPC_SEQIB_SN,
+  TILE_OPC_SEQIH,
+  TILE_OPC_SEQIH_SN,
+  TILE_OPC_SH,
+  TILE_OPC_SHADD,
+  TILE_OPC_SHL,
+  TILE_OPC_SHL_SN,
+  TILE_OPC_SHLB,
+  TILE_OPC_SHLB_SN,
+  TILE_OPC_SHLH,
+  TILE_OPC_SHLH_SN,
+  TILE_OPC_SHLI,
+  TILE_OPC_SHLI_SN,
+  TILE_OPC_SHLIB,
+  TILE_OPC_SHLIB_SN,
+  TILE_OPC_SHLIH,
+  TILE_OPC_SHLIH_SN,
+  TILE_OPC_SHR,
+  TILE_OPC_SHR_SN,
+  TILE_OPC_SHRB,
+  TILE_OPC_SHRB_SN,
+  TILE_OPC_SHRH,
+  TILE_OPC_SHRH_SN,
+  TILE_OPC_SHRI,
+  TILE_OPC_SHRI_SN,
+  TILE_OPC_SHRIB,
+  TILE_OPC_SHRIB_SN,
+  TILE_OPC_SHRIH,
+  TILE_OPC_SHRIH_SN,
+  TILE_OPC_SLT,
+  TILE_OPC_SLT_SN,
+  TILE_OPC_SLT_U,
+  TILE_OPC_SLT_U_SN,
+  TILE_OPC_SLTB,
+  TILE_OPC_SLTB_SN,
+  TILE_OPC_SLTB_U,
+  TILE_OPC_SLTB_U_SN,
+  TILE_OPC_SLTE,
+  TILE_OPC_SLTE_SN,
+  TILE_OPC_SLTE_U,
+  TILE_OPC_SLTE_U_SN,
+  TILE_OPC_SLTEB,
+  TILE_OPC_SLTEB_SN,
+  TILE_OPC_SLTEB_U,
+  TILE_OPC_SLTEB_U_SN,
+  TILE_OPC_SLTEH,
+  TILE_OPC_SLTEH_SN,
+  TILE_OPC_SLTEH_U,
+  TILE_OPC_SLTEH_U_SN,
+  TILE_OPC_SLTH,
+  TILE_OPC_SLTH_SN,
+  TILE_OPC_SLTH_U,
+  TILE_OPC_SLTH_U_SN,
+  TILE_OPC_SLTI,
+  TILE_OPC_SLTI_SN,
+  TILE_OPC_SLTI_U,
+  TILE_OPC_SLTI_U_SN,
+  TILE_OPC_SLTIB,
+  TILE_OPC_SLTIB_SN,
+  TILE_OPC_SLTIB_U,
+  TILE_OPC_SLTIB_U_SN,
+  TILE_OPC_SLTIH,
+  TILE_OPC_SLTIH_SN,
+  TILE_OPC_SLTIH_U,
+  TILE_OPC_SLTIH_U_SN,
+  TILE_OPC_SNE,
+  TILE_OPC_SNE_SN,
+  TILE_OPC_SNEB,
+  TILE_OPC_SNEB_SN,
+  TILE_OPC_SNEH,
+  TILE_OPC_SNEH_SN,
+  TILE_OPC_SRA,
+  TILE_OPC_SRA_SN,
+  TILE_OPC_SRAB,
+  TILE_OPC_SRAB_SN,
+  TILE_OPC_SRAH,
+  TILE_OPC_SRAH_SN,
+  TILE_OPC_SRAI,
+  TILE_OPC_SRAI_SN,
+  TILE_OPC_SRAIB,
+  TILE_OPC_SRAIB_SN,
+  TILE_OPC_SRAIH,
+  TILE_OPC_SRAIH_SN,
+  TILE_OPC_SUB,
+  TILE_OPC_SUB_SN,
+  TILE_OPC_SUBB,
+  TILE_OPC_SUBB_SN,
+  TILE_OPC_SUBBS_U,
+  TILE_OPC_SUBBS_U_SN,
+  TILE_OPC_SUBH,
+  TILE_OPC_SUBH_SN,
+  TILE_OPC_SUBHS,
+  TILE_OPC_SUBHS_SN,
+  TILE_OPC_SUBS,
+  TILE_OPC_SUBS_SN,
+  TILE_OPC_SW,
+  TILE_OPC_SWADD,
+  TILE_OPC_SWINT0,
+  TILE_OPC_SWINT1,
+  TILE_OPC_SWINT2,
+  TILE_OPC_SWINT3,
+  TILE_OPC_TBLIDXB0,
+  TILE_OPC_TBLIDXB0_SN,
+  TILE_OPC_TBLIDXB1,
+  TILE_OPC_TBLIDXB1_SN,
+  TILE_OPC_TBLIDXB2,
+  TILE_OPC_TBLIDXB2_SN,
+  TILE_OPC_TBLIDXB3,
+  TILE_OPC_TBLIDXB3_SN,
+  TILE_OPC_TNS,
+  TILE_OPC_TNS_SN,
+  TILE_OPC_WH64,
+  TILE_OPC_XOR,
+  TILE_OPC_XOR_SN,
+  TILE_OPC_XORI,
+  TILE_OPC_XORI_SN,
+  TILE_OPC_NONE
+} tile_mnemonic;
+
+/* 64-bit pattern for a { bpt ; nop } bundle. */
+#define TILE_BPT_BUNDLE 0x400b3cae70166000ULL
+
+
+#define TILE_ELF_MACHINE_CODE EM_TILEPRO
+
+#define TILE_ELF_NAME "elf32-tilepro"
+
+
+static __inline unsigned int
+get_BrOff_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_BrOff_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000);
+}
+
+static __inline unsigned int
+get_BrType_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0xf);
+}
+
+static __inline unsigned int
+get_Dest_Imm8_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x0000003f) |
+         (((unsigned int)(n >> 43)) & 0x000000c0);
+}
+
+static __inline unsigned int
+get_Dest_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 2)) & 0x3);
+}
+
+static __inline unsigned int
+get_Dest_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Dest_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Imm16_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xffff);
+}
+
+static __inline unsigned int
+get_Imm16_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xffff);
+}
+
+static __inline unsigned int
+get_Imm8_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0xff);
+}
+
+static __inline unsigned int
+get_Imm8_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0xff);
+}
+
+static __inline unsigned int
+get_ImmOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 20)) & 0x7f);
+}
+
+static __inline unsigned int
+get_ImmOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 51)) & 0x7f);
+}
+
+static __inline unsigned int
+get_ImmRROpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 8)) & 0x3);
+}
+
+static __inline unsigned int
+get_JOffLong_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000) |
+         (((unsigned int)(n >> 14)) & 0x001e0000) |
+         (((unsigned int)(n >> 16)) & 0x07e00000) |
+         (((unsigned int)(n >> 31)) & 0x18000000);
+}
+
+static __inline unsigned int
+get_JOff_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x00007fff) |
+         (((unsigned int)(n >> 20)) & 0x00018000) |
+         (((unsigned int)(n >> 14)) & 0x001e0000) |
+         (((unsigned int)(n >> 16)) & 0x07e00000) |
+         (((unsigned int)(n >> 31)) & 0x08000000);
+}
+
+static __inline unsigned int
+get_MF_Imm15_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x00003fff) |
+         (((unsigned int)(n >> 44)) & 0x00004000);
+}
+
+static __inline unsigned int
+get_MMEnd_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMEnd_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMStart_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 23)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MMStart_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 54)) & 0x1f);
+}
+
+static __inline unsigned int
+get_MT_Imm15_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 31)) & 0x0000003f) |
+         (((unsigned int)(n >> 37)) & 0x00003fc0) |
+         (((unsigned int)(n >> 44)) & 0x00004000);
+}
+
+static __inline unsigned int
+get_Mode(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 63)) & 0x1);
+}
+
+static __inline unsigned int
+get_NoRegOpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 10)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Opcode_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 28)) & 0x7);
+}
+
+static __inline unsigned int
+get_Opcode_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 59)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 27)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 59)) & 0xf);
+}
+
+static __inline unsigned int
+get_Opcode_Y2(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 56)) & 0x7);
+}
+
+static __inline unsigned int
+get_RROpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 4)) & 0xf);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x1ff);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x1ff);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 18)) & 0x3);
+}
+
+static __inline unsigned int
+get_RRROpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 49)) & 0x3);
+}
+
+static __inline unsigned int
+get_RouteOpcodeExtension_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_S_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 27)) & 0x1);
+}
+
+static __inline unsigned int
+get_S_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 58)) & 0x1);
+}
+
+static __inline unsigned int
+get_ShAmt_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_ShAmt_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_SrcA_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 6)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 6)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 37)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcA_Y2(tile_bundle_bits n)
+{
+  return (((n >> 26)) & 0x00000001) |
+         (((unsigned int)(n >> 50)) & 0x0000003e);
+}
+
+static __inline unsigned int
+get_SrcBDest_Y2(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 20)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x3f);
+}
+
+static __inline unsigned int
+get_SrcB_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x3f);
+}
+
+static __inline unsigned int
+get_Src_SN(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 0)) & 0x3);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 12)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnOpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 43)) & 0x1f);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_X0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 17)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_X1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 48)) & 0x3ff);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_Y0(tile_bundle_bits num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((n >> 17)) & 0x7);
+}
+
+static __inline unsigned int
+get_UnShOpcodeExtension_Y1(tile_bundle_bits n)
+{
+  return (((unsigned int)(n >> 48)) & 0x7);
+}
+
+
+static __inline int
+sign_extend(int n, int num_bits)
+{
+  int shift = (int)(sizeof(int) * 8 - num_bits);
+  return (n << shift) >> shift;
+}
+
+
+
+static __inline tile_bundle_bits
+create_BrOff_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_BrOff_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20);
+}
+
+static __inline tile_bundle_bits
+create_BrType_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Imm8_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x0000003f)) << 31) |
+         (((tile_bundle_bits)(n & 0x000000c0)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Dest_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 2);
+}
+
+static __inline tile_bundle_bits
+create_Dest_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Dest_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Dest_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_Imm16_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xffff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm16_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xffff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xff) << 12);
+}
+
+static __inline tile_bundle_bits
+create_Imm8_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xff)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_ImmOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7f) << 20);
+}
+
+static __inline tile_bundle_bits
+create_ImmOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7f)) << 51);
+}
+
+static __inline tile_bundle_bits
+create_ImmRROpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 8);
+}
+
+static __inline tile_bundle_bits
+create_JOffLong_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20) |
+         (((tile_bundle_bits)(n & 0x001e0000)) << 14) |
+         (((tile_bundle_bits)(n & 0x07e00000)) << 16) |
+         (((tile_bundle_bits)(n & 0x18000000)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_JOff_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00007fff)) << 43) |
+         (((tile_bundle_bits)(n & 0x00018000)) << 20) |
+         (((tile_bundle_bits)(n & 0x001e0000)) << 14) |
+         (((tile_bundle_bits)(n & 0x07e00000)) << 16) |
+         (((tile_bundle_bits)(n & 0x08000000)) << 31);
+}
+
+static __inline tile_bundle_bits
+create_MF_Imm15_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x00003fff)) << 37) |
+         (((tile_bundle_bits)(n & 0x00004000)) << 44);
+}
+
+static __inline tile_bundle_bits
+create_MMEnd_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 18);
+}
+
+static __inline tile_bundle_bits
+create_MMEnd_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_MMStart_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 23);
+}
+
+static __inline tile_bundle_bits
+create_MMStart_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 54);
+}
+
+static __inline tile_bundle_bits
+create_MT_Imm15_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x0000003f)) << 31) |
+         (((tile_bundle_bits)(n & 0x00003fc0)) << 37) |
+         (((tile_bundle_bits)(n & 0x00004000)) << 44);
+}
+
+static __inline tile_bundle_bits
+create_Mode(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1)) << 63);
+}
+
+static __inline tile_bundle_bits
+create_NoRegOpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 0);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 10);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7) << 28);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 59);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 27);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0xf)) << 59);
+}
+
+static __inline tile_bundle_bits
+create_Opcode_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7)) << 56);
+}
+
+static __inline tile_bundle_bits
+create_RROpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0xf) << 4);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1ff) << 18);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1ff)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 18);
+}
+
+static __inline tile_bundle_bits
+create_RRROpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3)) << 49);
+}
+
+static __inline tile_bundle_bits
+create_RouteOpcodeExtension_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 0);
+}
+
+static __inline tile_bundle_bits
+create_S_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1) << 27);
+}
+
+static __inline tile_bundle_bits
+create_S_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1)) << 58);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_ShAmt_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 6);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 37);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 6);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 37);
+}
+
+static __inline tile_bundle_bits
+create_SrcA_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x00000001) << 26) |
+         (((tile_bundle_bits)(n & 0x0000003e)) << 50);
+}
+
+static __inline tile_bundle_bits
+create_SrcBDest_Y2(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 20);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_SrcB_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_Src_SN(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3) << 0);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x1f) << 12);
+}
+
+static __inline tile_bundle_bits
+create_UnOpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x1f)) << 43);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_X0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x3ff) << 17);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_X1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x3ff)) << 48);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_Y0(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return ((n & 0x7) << 17);
+}
+
+static __inline tile_bundle_bits
+create_UnShOpcodeExtension_Y1(int num)
+{
+  const unsigned int n = (unsigned int)num;
+  return (((tile_bundle_bits)(n & 0x7)) << 48);
+}
+
+
+
+typedef enum
+{
+  TILE_PIPELINE_X0,
+  TILE_PIPELINE_X1,
+  TILE_PIPELINE_Y0,
+  TILE_PIPELINE_Y1,
+  TILE_PIPELINE_Y2,
+} tile_pipeline;
+
+#define tile_is_x_pipeline(p) ((int)(p) <= (int)TILE_PIPELINE_X1)
+
+typedef enum
+{
+  TILE_OP_TYPE_REGISTER,
+  TILE_OP_TYPE_IMMEDIATE,
+  TILE_OP_TYPE_ADDRESS,
+  TILE_OP_TYPE_SPR
+} tile_operand_type;
+
+/* This is the bit that determines if a bundle is in the Y encoding. */
+#define TILE_BUNDLE_Y_ENCODING_MASK ((tile_bundle_bits)1 << 63)
+
+enum
+{
+  /* Maximum number of instructions in a bundle (2 for X, 3 for Y). */
+  TILE_MAX_INSTRUCTIONS_PER_BUNDLE = 3,
+
+  /* How many different pipeline encodings are there? X0, X1, Y0, Y1, Y2. */
+  TILE_NUM_PIPELINE_ENCODINGS = 5,
+
+  /* Log base 2 of TILE_BUNDLE_SIZE_IN_BYTES. */
+  TILE_LOG2_BUNDLE_SIZE_IN_BYTES = 3,
+
+  /* Instructions take this many bytes. */
+  TILE_BUNDLE_SIZE_IN_BYTES = 1 << TILE_LOG2_BUNDLE_SIZE_IN_BYTES,
+
+  /* Log base 2 of TILE_BUNDLE_ALIGNMENT_IN_BYTES. */
+  TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES = 3,
+
+  /* Bundles should be aligned modulo this number of bytes. */
+  TILE_BUNDLE_ALIGNMENT_IN_BYTES =
+    (1 << TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES),
+
+  /* Log base 2 of TILE_SN_INSTRUCTION_SIZE_IN_BYTES. */
+  TILE_LOG2_SN_INSTRUCTION_SIZE_IN_BYTES = 1,
+
+  /* Static network instructions take this many bytes. */
+  TILE_SN_INSTRUCTION_SIZE_IN_BYTES =
+    (1 << TILE_LOG2_SN_INSTRUCTION_SIZE_IN_BYTES),
+
+  /* Number of registers (some are magic, such as network I/O). */
+  TILE_NUM_REGISTERS = 64,
+
+  /* Number of static network registers. */
+  TILE_NUM_SN_REGISTERS = 4
+};
+
+
+struct tile_operand
+{
+  /* Is this operand a register, immediate or address? */
+  tile_operand_type type;
+
+  /* The default relocation type for this operand.  */
+  signed int default_reloc : 16;
+
+  /* How many bits is this value? (used for range checking) */
+  unsigned int num_bits : 5;
+
+  /* Is the value signed? (used for range checking) */
+  unsigned int is_signed : 1;
+
+  /* Is this operand a source register? */
+  unsigned int is_src_reg : 1;
+
+  /* Is this operand written? (i.e. is it a destination register) */
+  unsigned int is_dest_reg : 1;
+
+  /* Is this operand PC-relative? */
+  unsigned int is_pc_relative : 1;
+
+  /* By how many bits do we right shift the value before inserting? */
+  unsigned int rightshift : 2;
+
+  /* Return the bits for this operand to be ORed into an existing bundle. */
+  tile_bundle_bits (*insert) (int op);
+
+  /* Extract this operand and return it. */
+  unsigned int (*extract) (tile_bundle_bits bundle);
+};
+
+
+extern const struct tile_operand tile_operands[];
+
+/* One finite-state machine per pipe for rapid instruction decoding. */
+extern const unsigned short * const
+tile_bundle_decoder_fsms[TILE_NUM_PIPELINE_ENCODINGS];
+
+
+struct tile_opcode
+{
+  /* The opcode mnemonic, e.g. "add" */
+  const char *name;
+
+  /* The enum value for this mnemonic. */
+  tile_mnemonic mnemonic;
+
+  /* A bit mask of which of the five pipes this instruction
+     is compatible with:
+     X0  0x01
+     X1  0x02
+     Y0  0x04
+     Y1  0x08
+     Y2  0x10 */
+  unsigned char pipes;
+
+  /* How many operands are there? */
+  unsigned char num_operands;
+
+  /* Which register does this write implicitly, or TREG_ZERO if none? */
+  unsigned char implicitly_written_register;
+
+  /* Can this be bundled with other instructions (almost always true). */
+  unsigned char can_bundle;
+
+  /* The description of the operands. Each of these is an
+   * index into the tile_operands[] table. */
+  unsigned char operands[TILE_NUM_PIPELINE_ENCODINGS][TILE_MAX_OPERANDS];
+
+};
+
+extern const struct tile_opcode tile_opcodes[];
+
+
+/* Used for non-textual disassembly into structs. */
+struct tile_decoded_instruction
+{
+  const struct tile_opcode *opcode;
+  const struct tile_operand *operands[TILE_MAX_OPERANDS];
+  int operand_values[TILE_MAX_OPERANDS];
+};
+
+
+/* Disassemble a bundle into a struct for machine processing. */
+extern int parse_insn_tile(tile_bundle_bits bits,
+                           unsigned int pc,
+                           struct tile_decoded_instruction
+                           decoded[TILE_MAX_INSTRUCTIONS_PER_BUNDLE]);
+
+
+
+#endif /* opcode_tile_h */
diff --git a/arch/tile/include/asm/opcode_constants.h b/arch/tile/include/asm/opcode_constants.h
new file mode 100644
index 000000000000..37a9f2958cb1
--- /dev/null
+++ b/arch/tile/include/asm/opcode_constants.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_OPCODE_CONSTANTS_H
+#define _ASM_TILE_OPCODE_CONSTANTS_H
+
+#include <arch/chip.h>
+
+#if CHIP_WORD_SIZE() == 64
+#include <asm/opcode_constants_64.h>
+#else
+#include <asm/opcode_constants_32.h>
+#endif
+
+#endif /* _ASM_TILE_OPCODE_CONSTANTS_H */
diff --git a/arch/tile/include/asm/opcode_constants_32.h b/arch/tile/include/asm/opcode_constants_32.h
new file mode 100644
index 000000000000..227d033b180c
--- /dev/null
+++ b/arch/tile/include/asm/opcode_constants_32.h
@@ -0,0 +1,480 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/* This file is machine-generated; DO NOT EDIT! */
+
+
+#ifndef _TILE_OPCODE_CONSTANTS_H
+#define _TILE_OPCODE_CONSTANTS_H
+enum
+{
+  ADDBS_U_SPECIAL_0_OPCODE_X0 = 98,
+  ADDBS_U_SPECIAL_0_OPCODE_X1 = 68,
+  ADDB_SPECIAL_0_OPCODE_X0 = 1,
+  ADDB_SPECIAL_0_OPCODE_X1 = 1,
+  ADDHS_SPECIAL_0_OPCODE_X0 = 99,
+  ADDHS_SPECIAL_0_OPCODE_X1 = 69,
+  ADDH_SPECIAL_0_OPCODE_X0 = 2,
+  ADDH_SPECIAL_0_OPCODE_X1 = 2,
+  ADDIB_IMM_0_OPCODE_X0 = 1,
+  ADDIB_IMM_0_OPCODE_X1 = 1,
+  ADDIH_IMM_0_OPCODE_X0 = 2,
+  ADDIH_IMM_0_OPCODE_X1 = 2,
+  ADDI_IMM_0_OPCODE_X0 = 3,
+  ADDI_IMM_0_OPCODE_X1 = 3,
+  ADDI_IMM_1_OPCODE_SN = 1,
+  ADDI_OPCODE_Y0 = 9,
+  ADDI_OPCODE_Y1 = 7,
+  ADDLIS_OPCODE_X0 = 1,
+  ADDLIS_OPCODE_X1 = 2,
+  ADDLI_OPCODE_X0 = 2,
+  ADDLI_OPCODE_X1 = 3,
+  ADDS_SPECIAL_0_OPCODE_X0 = 96,
+  ADDS_SPECIAL_0_OPCODE_X1 = 66,
+  ADD_SPECIAL_0_OPCODE_X0 = 3,
+  ADD_SPECIAL_0_OPCODE_X1 = 3,
+  ADD_SPECIAL_0_OPCODE_Y0 = 0,
+  ADD_SPECIAL_0_OPCODE_Y1 = 0,
+  ADIFFB_U_SPECIAL_0_OPCODE_X0 = 4,
+  ADIFFH_SPECIAL_0_OPCODE_X0 = 5,
+  ANDI_IMM_0_OPCODE_X0 = 1,
+  ANDI_IMM_0_OPCODE_X1 = 4,
+  ANDI_OPCODE_Y0 = 10,
+  ANDI_OPCODE_Y1 = 8,
+  AND_SPECIAL_0_OPCODE_X0 = 6,
+  AND_SPECIAL_0_OPCODE_X1 = 4,
+  AND_SPECIAL_2_OPCODE_Y0 = 0,
+  AND_SPECIAL_2_OPCODE_Y1 = 0,
+  AULI_OPCODE_X0 = 3,
+  AULI_OPCODE_X1 = 4,
+  AVGB_U_SPECIAL_0_OPCODE_X0 = 7,
+  AVGH_SPECIAL_0_OPCODE_X0 = 8,
+  BBNST_BRANCH_OPCODE_X1 = 15,
+  BBNS_BRANCH_OPCODE_X1 = 14,
+  BBNS_OPCODE_SN = 63,
+  BBST_BRANCH_OPCODE_X1 = 13,
+  BBS_BRANCH_OPCODE_X1 = 12,
+  BBS_OPCODE_SN = 62,
+  BGEZT_BRANCH_OPCODE_X1 = 7,
+  BGEZ_BRANCH_OPCODE_X1 = 6,
+  BGEZ_OPCODE_SN = 61,
+  BGZT_BRANCH_OPCODE_X1 = 5,
+  BGZ_BRANCH_OPCODE_X1 = 4,
+  BGZ_OPCODE_SN = 58,
+  BITX_UN_0_SHUN_0_OPCODE_X0 = 1,
+  BITX_UN_0_SHUN_0_OPCODE_Y0 = 1,
+  BLEZT_BRANCH_OPCODE_X1 = 11,
+  BLEZ_BRANCH_OPCODE_X1 = 10,
+  BLEZ_OPCODE_SN = 59,
+  BLZT_BRANCH_OPCODE_X1 = 9,
+  BLZ_BRANCH_OPCODE_X1 = 8,
+  BLZ_OPCODE_SN = 60,
+  BNZT_BRANCH_OPCODE_X1 = 3,
+  BNZ_BRANCH_OPCODE_X1 = 2,
+  BNZ_OPCODE_SN = 57,
+  BPT_NOREG_RR_IMM_0_OPCODE_SN = 1,
+  BRANCH_OPCODE_X1 = 5,
+  BYTEX_UN_0_SHUN_0_OPCODE_X0 = 2,
+  BYTEX_UN_0_SHUN_0_OPCODE_Y0 = 2,
+  BZT_BRANCH_OPCODE_X1 = 1,
+  BZ_BRANCH_OPCODE_X1 = 0,
+  BZ_OPCODE_SN = 56,
+  CLZ_UN_0_SHUN_0_OPCODE_X0 = 3,
+  CLZ_UN_0_SHUN_0_OPCODE_Y0 = 3,
+  CRC32_32_SPECIAL_0_OPCODE_X0 = 9,
+  CRC32_8_SPECIAL_0_OPCODE_X0 = 10,
+  CTZ_UN_0_SHUN_0_OPCODE_X0 = 4,
+  CTZ_UN_0_SHUN_0_OPCODE_Y0 = 4,
+  DRAIN_UN_0_SHUN_0_OPCODE_X1 = 1,
+  DTLBPR_UN_0_SHUN_0_OPCODE_X1 = 2,
+  DWORD_ALIGN_SPECIAL_0_OPCODE_X0 = 95,
+  FINV_UN_0_SHUN_0_OPCODE_X1 = 3,
+  FLUSH_UN_0_SHUN_0_OPCODE_X1 = 4,
+  FNOP_NOREG_RR_IMM_0_OPCODE_SN = 3,
+  FNOP_UN_0_SHUN_0_OPCODE_X0 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_X1 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_Y0 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_Y1 = 1,
+  HALT_NOREG_RR_IMM_0_OPCODE_SN = 0,
+  ICOH_UN_0_SHUN_0_OPCODE_X1 = 6,
+  ILL_UN_0_SHUN_0_OPCODE_X1 = 7,
+  ILL_UN_0_SHUN_0_OPCODE_Y1 = 2,
+  IMM_0_OPCODE_SN = 0,
+  IMM_0_OPCODE_X0 = 4,
+  IMM_0_OPCODE_X1 = 6,
+  IMM_1_OPCODE_SN = 1,
+  IMM_OPCODE_0_X0 = 5,
+  INTHB_SPECIAL_0_OPCODE_X0 = 11,
+  INTHB_SPECIAL_0_OPCODE_X1 = 5,
+  INTHH_SPECIAL_0_OPCODE_X0 = 12,
+  INTHH_SPECIAL_0_OPCODE_X1 = 6,
+  INTLB_SPECIAL_0_OPCODE_X0 = 13,
+  INTLB_SPECIAL_0_OPCODE_X1 = 7,
+  INTLH_SPECIAL_0_OPCODE_X0 = 14,
+  INTLH_SPECIAL_0_OPCODE_X1 = 8,
+  INV_UN_0_SHUN_0_OPCODE_X1 = 8,
+  IRET_UN_0_SHUN_0_OPCODE_X1 = 9,
+  JALB_OPCODE_X1 = 13,
+  JALF_OPCODE_X1 = 12,
+  JALRP_SPECIAL_0_OPCODE_X1 = 9,
+  JALRR_IMM_1_OPCODE_SN = 3,
+  JALR_RR_IMM_0_OPCODE_SN = 5,
+  JALR_SPECIAL_0_OPCODE_X1 = 10,
+  JB_OPCODE_X1 = 11,
+  JF_OPCODE_X1 = 10,
+  JRP_SPECIAL_0_OPCODE_X1 = 11,
+  JRR_IMM_1_OPCODE_SN = 2,
+  JR_RR_IMM_0_OPCODE_SN = 4,
+  JR_SPECIAL_0_OPCODE_X1 = 12,
+  LBADD_IMM_0_OPCODE_X1 = 22,
+  LBADD_U_IMM_0_OPCODE_X1 = 23,
+  LB_OPCODE_Y2 = 0,
+  LB_UN_0_SHUN_0_OPCODE_X1 = 10,
+  LB_U_OPCODE_Y2 = 1,
+  LB_U_UN_0_SHUN_0_OPCODE_X1 = 11,
+  LHADD_IMM_0_OPCODE_X1 = 24,
+  LHADD_U_IMM_0_OPCODE_X1 = 25,
+  LH_OPCODE_Y2 = 2,
+  LH_UN_0_SHUN_0_OPCODE_X1 = 12,
+  LH_U_OPCODE_Y2 = 3,
+  LH_U_UN_0_SHUN_0_OPCODE_X1 = 13,
+  LNK_SPECIAL_0_OPCODE_X1 = 13,
+  LWADD_IMM_0_OPCODE_X1 = 26,
+  LWADD_NA_IMM_0_OPCODE_X1 = 27,
+  LW_NA_UN_0_SHUN_0_OPCODE_X1 = 24,
+  LW_OPCODE_Y2 = 4,
+  LW_UN_0_SHUN_0_OPCODE_X1 = 14,
+  MAXB_U_SPECIAL_0_OPCODE_X0 = 15,
+  MAXB_U_SPECIAL_0_OPCODE_X1 = 14,
+  MAXH_SPECIAL_0_OPCODE_X0 = 16,
+  MAXH_SPECIAL_0_OPCODE_X1 = 15,
+  MAXIB_U_IMM_0_OPCODE_X0 = 4,
+  MAXIB_U_IMM_0_OPCODE_X1 = 5,
+  MAXIH_IMM_0_OPCODE_X0 = 5,
+  MAXIH_IMM_0_OPCODE_X1 = 6,
+  MFSPR_IMM_0_OPCODE_X1 = 7,
+  MF_UN_0_SHUN_0_OPCODE_X1 = 15,
+  MINB_U_SPECIAL_0_OPCODE_X0 = 17,
+  MINB_U_SPECIAL_0_OPCODE_X1 = 16,
+  MINH_SPECIAL_0_OPCODE_X0 = 18,
+  MINH_SPECIAL_0_OPCODE_X1 = 17,
+  MINIB_U_IMM_0_OPCODE_X0 = 6,
+  MINIB_U_IMM_0_OPCODE_X1 = 8,
+  MINIH_IMM_0_OPCODE_X0 = 7,
+  MINIH_IMM_0_OPCODE_X1 = 9,
+  MM_OPCODE_X0 = 6,
+  MM_OPCODE_X1 = 7,
+  MNZB_SPECIAL_0_OPCODE_X0 = 19,
+  MNZB_SPECIAL_0_OPCODE_X1 = 18,
+  MNZH_SPECIAL_0_OPCODE_X0 = 20,
+  MNZH_SPECIAL_0_OPCODE_X1 = 19,
+  MNZ_SPECIAL_0_OPCODE_X0 = 21,
+  MNZ_SPECIAL_0_OPCODE_X1 = 20,
+  MNZ_SPECIAL_1_OPCODE_Y0 = 0,
+  MNZ_SPECIAL_1_OPCODE_Y1 = 1,
+  MOVEI_IMM_1_OPCODE_SN = 0,
+  MOVE_RR_IMM_0_OPCODE_SN = 8,
+  MTSPR_IMM_0_OPCODE_X1 = 10,
+  MULHHA_SS_SPECIAL_0_OPCODE_X0 = 22,
+  MULHHA_SS_SPECIAL_7_OPCODE_Y0 = 0,
+  MULHHA_SU_SPECIAL_0_OPCODE_X0 = 23,
+  MULHHA_UU_SPECIAL_0_OPCODE_X0 = 24,
+  MULHHA_UU_SPECIAL_7_OPCODE_Y0 = 1,
+  MULHHSA_UU_SPECIAL_0_OPCODE_X0 = 25,
+  MULHH_SS_SPECIAL_0_OPCODE_X0 = 26,
+  MULHH_SS_SPECIAL_6_OPCODE_Y0 = 0,
+  MULHH_SU_SPECIAL_0_OPCODE_X0 = 27,
+  MULHH_UU_SPECIAL_0_OPCODE_X0 = 28,
+  MULHH_UU_SPECIAL_6_OPCODE_Y0 = 1,
+  MULHLA_SS_SPECIAL_0_OPCODE_X0 = 29,
+  MULHLA_SU_SPECIAL_0_OPCODE_X0 = 30,
+  MULHLA_US_SPECIAL_0_OPCODE_X0 = 31,
+  MULHLA_UU_SPECIAL_0_OPCODE_X0 = 32,
+  MULHLSA_UU_SPECIAL_0_OPCODE_X0 = 33,
+  MULHLSA_UU_SPECIAL_5_OPCODE_Y0 = 0,
+  MULHL_SS_SPECIAL_0_OPCODE_X0 = 34,
+  MULHL_SU_SPECIAL_0_OPCODE_X0 = 35,
+  MULHL_US_SPECIAL_0_OPCODE_X0 = 36,
+  MULHL_UU_SPECIAL_0_OPCODE_X0 = 37,
+  MULLLA_SS_SPECIAL_0_OPCODE_X0 = 38,
+  MULLLA_SS_SPECIAL_7_OPCODE_Y0 = 2,
+  MULLLA_SU_SPECIAL_0_OPCODE_X0 = 39,
+  MULLLA_UU_SPECIAL_0_OPCODE_X0 = 40,
+  MULLLA_UU_SPECIAL_7_OPCODE_Y0 = 3,
+  MULLLSA_UU_SPECIAL_0_OPCODE_X0 = 41,
+  MULLL_SS_SPECIAL_0_OPCODE_X0 = 42,
+  MULLL_SS_SPECIAL_6_OPCODE_Y0 = 2,
+  MULLL_SU_SPECIAL_0_OPCODE_X0 = 43,
+  MULLL_UU_SPECIAL_0_OPCODE_X0 = 44,
+  MULLL_UU_SPECIAL_6_OPCODE_Y0 = 3,
+  MVNZ_SPECIAL_0_OPCODE_X0 = 45,
+  MVNZ_SPECIAL_1_OPCODE_Y0 = 1,
+  MVZ_SPECIAL_0_OPCODE_X0 = 46,
+  MVZ_SPECIAL_1_OPCODE_Y0 = 2,
+  MZB_SPECIAL_0_OPCODE_X0 = 47,
+  MZB_SPECIAL_0_OPCODE_X1 = 21,
+  MZH_SPECIAL_0_OPCODE_X0 = 48,
+  MZH_SPECIAL_0_OPCODE_X1 = 22,
+  MZ_SPECIAL_0_OPCODE_X0 = 49,
+  MZ_SPECIAL_0_OPCODE_X1 = 23,
+  MZ_SPECIAL_1_OPCODE_Y0 = 3,
+  MZ_SPECIAL_1_OPCODE_Y1 = 2,
+  NAP_UN_0_SHUN_0_OPCODE_X1 = 16,
+  NOP_NOREG_RR_IMM_0_OPCODE_SN = 2,
+  NOP_UN_0_SHUN_0_OPCODE_X0 = 6,
+  NOP_UN_0_SHUN_0_OPCODE_X1 = 17,
+  NOP_UN_0_SHUN_0_OPCODE_Y0 = 6,
+  NOP_UN_0_SHUN_0_OPCODE_Y1 = 3,
+  NOREG_RR_IMM_0_OPCODE_SN = 0,
+  NOR_SPECIAL_0_OPCODE_X0 = 50,
+  NOR_SPECIAL_0_OPCODE_X1 = 24,
+  NOR_SPECIAL_2_OPCODE_Y0 = 1,
+  NOR_SPECIAL_2_OPCODE_Y1 = 1,
+  ORI_IMM_0_OPCODE_X0 = 8,
+  ORI_IMM_0_OPCODE_X1 = 11,
+  ORI_OPCODE_Y0 = 11,
+  ORI_OPCODE_Y1 = 9,
+  OR_SPECIAL_0_OPCODE_X0 = 51,
+  OR_SPECIAL_0_OPCODE_X1 = 25,
+  OR_SPECIAL_2_OPCODE_Y0 = 2,
+  OR_SPECIAL_2_OPCODE_Y1 = 2,
+  PACKBS_U_SPECIAL_0_OPCODE_X0 = 103,
+  PACKBS_U_SPECIAL_0_OPCODE_X1 = 73,
+  PACKHB_SPECIAL_0_OPCODE_X0 = 52,
+  PACKHB_SPECIAL_0_OPCODE_X1 = 26,
+  PACKHS_SPECIAL_0_OPCODE_X0 = 102,
+  PACKHS_SPECIAL_0_OPCODE_X1 = 72,
+  PACKLB_SPECIAL_0_OPCODE_X0 = 53,
+  PACKLB_SPECIAL_0_OPCODE_X1 = 27,
+  PCNT_UN_0_SHUN_0_OPCODE_X0 = 7,
+  PCNT_UN_0_SHUN_0_OPCODE_Y0 = 7,
+  RLI_SHUN_0_OPCODE_X0 = 1,
+  RLI_SHUN_0_OPCODE_X1 = 1,
+  RLI_SHUN_0_OPCODE_Y0 = 1,
+  RLI_SHUN_0_OPCODE_Y1 = 1,
+  RL_SPECIAL_0_OPCODE_X0 = 54,
+  RL_SPECIAL_0_OPCODE_X1 = 28,
+  RL_SPECIAL_3_OPCODE_Y0 = 0,
+  RL_SPECIAL_3_OPCODE_Y1 = 0,
+  RR_IMM_0_OPCODE_SN = 0,
+  S1A_SPECIAL_0_OPCODE_X0 = 55,
+  S1A_SPECIAL_0_OPCODE_X1 = 29,
+  S1A_SPECIAL_0_OPCODE_Y0 = 1,
+  S1A_SPECIAL_0_OPCODE_Y1 = 1,
+  S2A_SPECIAL_0_OPCODE_X0 = 56,
+  S2A_SPECIAL_0_OPCODE_X1 = 30,
+  S2A_SPECIAL_0_OPCODE_Y0 = 2,
+  S2A_SPECIAL_0_OPCODE_Y1 = 2,
+  S3A_SPECIAL_0_OPCODE_X0 = 57,
+  S3A_SPECIAL_0_OPCODE_X1 = 31,
+  S3A_SPECIAL_5_OPCODE_Y0 = 1,
+  S3A_SPECIAL_5_OPCODE_Y1 = 1,
+  SADAB_U_SPECIAL_0_OPCODE_X0 = 58,
+  SADAH_SPECIAL_0_OPCODE_X0 = 59,
+  SADAH_U_SPECIAL_0_OPCODE_X0 = 60,
+  SADB_U_SPECIAL_0_OPCODE_X0 = 61,
+  SADH_SPECIAL_0_OPCODE_X0 = 62,
+  SADH_U_SPECIAL_0_OPCODE_X0 = 63,
+  SBADD_IMM_0_OPCODE_X1 = 28,
+  SB_OPCODE_Y2 = 5,
+  SB_SPECIAL_0_OPCODE_X1 = 32,
+  SEQB_SPECIAL_0_OPCODE_X0 = 64,
+  SEQB_SPECIAL_0_OPCODE_X1 = 33,
+  SEQH_SPECIAL_0_OPCODE_X0 = 65,
+  SEQH_SPECIAL_0_OPCODE_X1 = 34,
+  SEQIB_IMM_0_OPCODE_X0 = 9,
+  SEQIB_IMM_0_OPCODE_X1 = 12,
+  SEQIH_IMM_0_OPCODE_X0 = 10,
+  SEQIH_IMM_0_OPCODE_X1 = 13,
+  SEQI_IMM_0_OPCODE_X0 = 11,
+  SEQI_IMM_0_OPCODE_X1 = 14,
+  SEQI_OPCODE_Y0 = 12,
+  SEQI_OPCODE_Y1 = 10,
+  SEQ_SPECIAL_0_OPCODE_X0 = 66,
+  SEQ_SPECIAL_0_OPCODE_X1 = 35,
+  SEQ_SPECIAL_5_OPCODE_Y0 = 2,
+  SEQ_SPECIAL_5_OPCODE_Y1 = 2,
+  SHADD_IMM_0_OPCODE_X1 = 29,
+  SHL8II_IMM_0_OPCODE_SN = 3,
+  SHLB_SPECIAL_0_OPCODE_X0 = 67,
+  SHLB_SPECIAL_0_OPCODE_X1 = 36,
+  SHLH_SPECIAL_0_OPCODE_X0 = 68,
+  SHLH_SPECIAL_0_OPCODE_X1 = 37,
+  SHLIB_SHUN_0_OPCODE_X0 = 2,
+  SHLIB_SHUN_0_OPCODE_X1 = 2,
+  SHLIH_SHUN_0_OPCODE_X0 = 3,
+  SHLIH_SHUN_0_OPCODE_X1 = 3,
+  SHLI_SHUN_0_OPCODE_X0 = 4,
+  SHLI_SHUN_0_OPCODE_X1 = 4,
+  SHLI_SHUN_0_OPCODE_Y0 = 2,
+  SHLI_SHUN_0_OPCODE_Y1 = 2,
+  SHL_SPECIAL_0_OPCODE_X0 = 69,
+  SHL_SPECIAL_0_OPCODE_X1 = 38,
+  SHL_SPECIAL_3_OPCODE_Y0 = 1,
+  SHL_SPECIAL_3_OPCODE_Y1 = 1,
+  SHR1_RR_IMM_0_OPCODE_SN = 9,
+  SHRB_SPECIAL_0_OPCODE_X0 = 70,
+  SHRB_SPECIAL_0_OPCODE_X1 = 39,
+  SHRH_SPECIAL_0_OPCODE_X0 = 71,
+  SHRH_SPECIAL_0_OPCODE_X1 = 40,
+  SHRIB_SHUN_0_OPCODE_X0 = 5,
+  SHRIB_SHUN_0_OPCODE_X1 = 5,
+  SHRIH_SHUN_0_OPCODE_X0 = 6,
+  SHRIH_SHUN_0_OPCODE_X1 = 6,
+  SHRI_SHUN_0_OPCODE_X0 = 7,
+  SHRI_SHUN_0_OPCODE_X1 = 7,
+  SHRI_SHUN_0_OPCODE_Y0 = 3,
+  SHRI_SHUN_0_OPCODE_Y1 = 3,
+  SHR_SPECIAL_0_OPCODE_X0 = 72,
+  SHR_SPECIAL_0_OPCODE_X1 = 41,
+  SHR_SPECIAL_3_OPCODE_Y0 = 2,
+  SHR_SPECIAL_3_OPCODE_Y1 = 2,
+  SHUN_0_OPCODE_X0 = 7,
+  SHUN_0_OPCODE_X1 = 8,
+  SHUN_0_OPCODE_Y0 = 13,
+  SHUN_0_OPCODE_Y1 = 11,
+  SH_OPCODE_Y2 = 6,
+  SH_SPECIAL_0_OPCODE_X1 = 42,
+  SLTB_SPECIAL_0_OPCODE_X0 = 73,
+  SLTB_SPECIAL_0_OPCODE_X1 = 43,
+  SLTB_U_SPECIAL_0_OPCODE_X0 = 74,
+  SLTB_U_SPECIAL_0_OPCODE_X1 = 44,
+  SLTEB_SPECIAL_0_OPCODE_X0 = 75,
+  SLTEB_SPECIAL_0_OPCODE_X1 = 45,
+  SLTEB_U_SPECIAL_0_OPCODE_X0 = 76,
+  SLTEB_U_SPECIAL_0_OPCODE_X1 = 46,
+  SLTEH_SPECIAL_0_OPCODE_X0 = 77,
+  SLTEH_SPECIAL_0_OPCODE_X1 = 47,
+  SLTEH_U_SPECIAL_0_OPCODE_X0 = 78,
+  SLTEH_U_SPECIAL_0_OPCODE_X1 = 48,
+  SLTE_SPECIAL_0_OPCODE_X0 = 79,
+  SLTE_SPECIAL_0_OPCODE_X1 = 49,
+  SLTE_SPECIAL_4_OPCODE_Y0 = 0,
+  SLTE_SPECIAL_4_OPCODE_Y1 = 0,
+  SLTE_U_SPECIAL_0_OPCODE_X0 = 80,
+  SLTE_U_SPECIAL_0_OPCODE_X1 = 50,
+  SLTE_U_SPECIAL_4_OPCODE_Y0 = 1,
+  SLTE_U_SPECIAL_4_OPCODE_Y1 = 1,
+  SLTH_SPECIAL_0_OPCODE_X0 = 81,
+  SLTH_SPECIAL_0_OPCODE_X1 = 51,
+  SLTH_U_SPECIAL_0_OPCODE_X0 = 82,
+  SLTH_U_SPECIAL_0_OPCODE_X1 = 52,
+  SLTIB_IMM_0_OPCODE_X0 = 12,
+  SLTIB_IMM_0_OPCODE_X1 = 15,
+  SLTIB_U_IMM_0_OPCODE_X0 = 13,
+  SLTIB_U_IMM_0_OPCODE_X1 = 16,
+  SLTIH_IMM_0_OPCODE_X0 = 14,
+  SLTIH_IMM_0_OPCODE_X1 = 17,
+  SLTIH_U_IMM_0_OPCODE_X0 = 15,
+  SLTIH_U_IMM_0_OPCODE_X1 = 18,
+  SLTI_IMM_0_OPCODE_X0 = 16,
+  SLTI_IMM_0_OPCODE_X1 = 19,
+  SLTI_OPCODE_Y0 = 14,
+  SLTI_OPCODE_Y1 = 12,
+  SLTI_U_IMM_0_OPCODE_X0 = 17,
+  SLTI_U_IMM_0_OPCODE_X1 = 20,
+  SLTI_U_OPCODE_Y0 = 15,
+  SLTI_U_OPCODE_Y1 = 13,
+  SLT_SPECIAL_0_OPCODE_X0 = 83,
+  SLT_SPECIAL_0_OPCODE_X1 = 53,
+  SLT_SPECIAL_4_OPCODE_Y0 = 2,
+  SLT_SPECIAL_4_OPCODE_Y1 = 2,
+  SLT_U_SPECIAL_0_OPCODE_X0 = 84,
+  SLT_U_SPECIAL_0_OPCODE_X1 = 54,
+  SLT_U_SPECIAL_4_OPCODE_Y0 = 3,
+  SLT_U_SPECIAL_4_OPCODE_Y1 = 3,
+  SNEB_SPECIAL_0_OPCODE_X0 = 85,
+  SNEB_SPECIAL_0_OPCODE_X1 = 55,
+  SNEH_SPECIAL_0_OPCODE_X0 = 86,
+  SNEH_SPECIAL_0_OPCODE_X1 = 56,
+  SNE_SPECIAL_0_OPCODE_X0 = 87,
+  SNE_SPECIAL_0_OPCODE_X1 = 57,
+  SNE_SPECIAL_5_OPCODE_Y0 = 3,
+  SNE_SPECIAL_5_OPCODE_Y1 = 3,
+  SPECIAL_0_OPCODE_X0 = 0,
+  SPECIAL_0_OPCODE_X1 = 1,
+  SPECIAL_0_OPCODE_Y0 = 1,
+  SPECIAL_0_OPCODE_Y1 = 1,
+  SPECIAL_1_OPCODE_Y0 = 2,
+  SPECIAL_1_OPCODE_Y1 = 2,
+  SPECIAL_2_OPCODE_Y0 = 3,
+  SPECIAL_2_OPCODE_Y1 = 3,
+  SPECIAL_3_OPCODE_Y0 = 4,
+  SPECIAL_3_OPCODE_Y1 = 4,
+  SPECIAL_4_OPCODE_Y0 = 5,
+  SPECIAL_4_OPCODE_Y1 = 5,
+  SPECIAL_5_OPCODE_Y0 = 6,
+  SPECIAL_5_OPCODE_Y1 = 6,
+  SPECIAL_6_OPCODE_Y0 = 7,
+  SPECIAL_7_OPCODE_Y0 = 8,
+  SRAB_SPECIAL_0_OPCODE_X0 = 88,
+  SRAB_SPECIAL_0_OPCODE_X1 = 58,
+  SRAH_SPECIAL_0_OPCODE_X0 = 89,
+  SRAH_SPECIAL_0_OPCODE_X1 = 59,
+  SRAIB_SHUN_0_OPCODE_X0 = 8,
+  SRAIB_SHUN_0_OPCODE_X1 = 8,
+  SRAIH_SHUN_0_OPCODE_X0 = 9,
+  SRAIH_SHUN_0_OPCODE_X1 = 9,
+  SRAI_SHUN_0_OPCODE_X0 = 10,
+  SRAI_SHUN_0_OPCODE_X1 = 10,
+  SRAI_SHUN_0_OPCODE_Y0 = 4,
+  SRAI_SHUN_0_OPCODE_Y1 = 4,
+  SRA_SPECIAL_0_OPCODE_X0 = 90,
+  SRA_SPECIAL_0_OPCODE_X1 = 60,
+  SRA_SPECIAL_3_OPCODE_Y0 = 3,
+  SRA_SPECIAL_3_OPCODE_Y1 = 3,
+  SUBBS_U_SPECIAL_0_OPCODE_X0 = 100,
+  SUBBS_U_SPECIAL_0_OPCODE_X1 = 70,
+  SUBB_SPECIAL_0_OPCODE_X0 = 91,
+  SUBB_SPECIAL_0_OPCODE_X1 = 61,
+  SUBHS_SPECIAL_0_OPCODE_X0 = 101,
+  SUBHS_SPECIAL_0_OPCODE_X1 = 71,
+  SUBH_SPECIAL_0_OPCODE_X0 = 92,
+  SUBH_SPECIAL_0_OPCODE_X1 = 62,
+  SUBS_SPECIAL_0_OPCODE_X0 = 97,
+  SUBS_SPECIAL_0_OPCODE_X1 = 67,
+  SUB_SPECIAL_0_OPCODE_X0 = 93,
+  SUB_SPECIAL_0_OPCODE_X1 = 63,
+  SUB_SPECIAL_0_OPCODE_Y0 = 3,
+  SUB_SPECIAL_0_OPCODE_Y1 = 3,
+  SWADD_IMM_0_OPCODE_X1 = 30,
+  SWINT0_UN_0_SHUN_0_OPCODE_X1 = 18,
+  SWINT1_UN_0_SHUN_0_OPCODE_X1 = 19,
+  SWINT2_UN_0_SHUN_0_OPCODE_X1 = 20,
+  SWINT3_UN_0_SHUN_0_OPCODE_X1 = 21,
+  SW_OPCODE_Y2 = 7,
+  SW_SPECIAL_0_OPCODE_X1 = 64,
+  TBLIDXB0_UN_0_SHUN_0_OPCODE_X0 = 8,
+  TBLIDXB0_UN_0_SHUN_0_OPCODE_Y0 = 8,
+  TBLIDXB1_UN_0_SHUN_0_OPCODE_X0 = 9,
+  TBLIDXB1_UN_0_SHUN_0_OPCODE_Y0 = 9,
+  TBLIDXB2_UN_0_SHUN_0_OPCODE_X0 = 10,
+  TBLIDXB2_UN_0_SHUN_0_OPCODE_Y0 = 10,
+  TBLIDXB3_UN_0_SHUN_0_OPCODE_X0 = 11,
+  TBLIDXB3_UN_0_SHUN_0_OPCODE_Y0 = 11,
+  TNS_UN_0_SHUN_0_OPCODE_X1 = 22,
+  UN_0_SHUN_0_OPCODE_X0 = 11,
+  UN_0_SHUN_0_OPCODE_X1 = 11,
+  UN_0_SHUN_0_OPCODE_Y0 = 5,
+  UN_0_SHUN_0_OPCODE_Y1 = 5,
+  WH64_UN_0_SHUN_0_OPCODE_X1 = 23,
+  XORI_IMM_0_OPCODE_X0 = 2,
+  XORI_IMM_0_OPCODE_X1 = 21,
+  XOR_SPECIAL_0_OPCODE_X0 = 94,
+  XOR_SPECIAL_0_OPCODE_X1 = 65,
+  XOR_SPECIAL_2_OPCODE_Y0 = 3,
+  XOR_SPECIAL_2_OPCODE_Y1 = 3
+};
+
+#endif /* !_TILE_OPCODE_CONSTANTS_H */
diff --git a/arch/tile/include/asm/opcode_constants_64.h b/arch/tile/include/asm/opcode_constants_64.h
new file mode 100644
index 000000000000..227d033b180c
--- /dev/null
+++ b/arch/tile/include/asm/opcode_constants_64.h
@@ -0,0 +1,480 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/* This file is machine-generated; DO NOT EDIT! */
+
+
+#ifndef _TILE_OPCODE_CONSTANTS_H
+#define _TILE_OPCODE_CONSTANTS_H
+enum
+{
+  ADDBS_U_SPECIAL_0_OPCODE_X0 = 98,
+  ADDBS_U_SPECIAL_0_OPCODE_X1 = 68,
+  ADDB_SPECIAL_0_OPCODE_X0 = 1,
+  ADDB_SPECIAL_0_OPCODE_X1 = 1,
+  ADDHS_SPECIAL_0_OPCODE_X0 = 99,
+  ADDHS_SPECIAL_0_OPCODE_X1 = 69,
+  ADDH_SPECIAL_0_OPCODE_X0 = 2,
+  ADDH_SPECIAL_0_OPCODE_X1 = 2,
+  ADDIB_IMM_0_OPCODE_X0 = 1,
+  ADDIB_IMM_0_OPCODE_X1 = 1,
+  ADDIH_IMM_0_OPCODE_X0 = 2,
+  ADDIH_IMM_0_OPCODE_X1 = 2,
+  ADDI_IMM_0_OPCODE_X0 = 3,
+  ADDI_IMM_0_OPCODE_X1 = 3,
+  ADDI_IMM_1_OPCODE_SN = 1,
+  ADDI_OPCODE_Y0 = 9,
+  ADDI_OPCODE_Y1 = 7,
+  ADDLIS_OPCODE_X0 = 1,
+  ADDLIS_OPCODE_X1 = 2,
+  ADDLI_OPCODE_X0 = 2,
+  ADDLI_OPCODE_X1 = 3,
+  ADDS_SPECIAL_0_OPCODE_X0 = 96,
+  ADDS_SPECIAL_0_OPCODE_X1 = 66,
+  ADD_SPECIAL_0_OPCODE_X0 = 3,
+  ADD_SPECIAL_0_OPCODE_X1 = 3,
+  ADD_SPECIAL_0_OPCODE_Y0 = 0,
+  ADD_SPECIAL_0_OPCODE_Y1 = 0,
+  ADIFFB_U_SPECIAL_0_OPCODE_X0 = 4,
+  ADIFFH_SPECIAL_0_OPCODE_X0 = 5,
+  ANDI_IMM_0_OPCODE_X0 = 1,
+  ANDI_IMM_0_OPCODE_X1 = 4,
+  ANDI_OPCODE_Y0 = 10,
+  ANDI_OPCODE_Y1 = 8,
+  AND_SPECIAL_0_OPCODE_X0 = 6,
+  AND_SPECIAL_0_OPCODE_X1 = 4,
+  AND_SPECIAL_2_OPCODE_Y0 = 0,
+  AND_SPECIAL_2_OPCODE_Y1 = 0,
+  AULI_OPCODE_X0 = 3,
+  AULI_OPCODE_X1 = 4,
+  AVGB_U_SPECIAL_0_OPCODE_X0 = 7,
+  AVGH_SPECIAL_0_OPCODE_X0 = 8,
+  BBNST_BRANCH_OPCODE_X1 = 15,
+  BBNS_BRANCH_OPCODE_X1 = 14,
+  BBNS_OPCODE_SN = 63,
+  BBST_BRANCH_OPCODE_X1 = 13,
+  BBS_BRANCH_OPCODE_X1 = 12,
+  BBS_OPCODE_SN = 62,
+  BGEZT_BRANCH_OPCODE_X1 = 7,
+  BGEZ_BRANCH_OPCODE_X1 = 6,
+  BGEZ_OPCODE_SN = 61,
+  BGZT_BRANCH_OPCODE_X1 = 5,
+  BGZ_BRANCH_OPCODE_X1 = 4,
+  BGZ_OPCODE_SN = 58,
+  BITX_UN_0_SHUN_0_OPCODE_X0 = 1,
+  BITX_UN_0_SHUN_0_OPCODE_Y0 = 1,
+  BLEZT_BRANCH_OPCODE_X1 = 11,
+  BLEZ_BRANCH_OPCODE_X1 = 10,
+  BLEZ_OPCODE_SN = 59,
+  BLZT_BRANCH_OPCODE_X1 = 9,
+  BLZ_BRANCH_OPCODE_X1 = 8,
+  BLZ_OPCODE_SN = 60,
+  BNZT_BRANCH_OPCODE_X1 = 3,
+  BNZ_BRANCH_OPCODE_X1 = 2,
+  BNZ_OPCODE_SN = 57,
+  BPT_NOREG_RR_IMM_0_OPCODE_SN = 1,
+  BRANCH_OPCODE_X1 = 5,
+  BYTEX_UN_0_SHUN_0_OPCODE_X0 = 2,
+  BYTEX_UN_0_SHUN_0_OPCODE_Y0 = 2,
+  BZT_BRANCH_OPCODE_X1 = 1,
+  BZ_BRANCH_OPCODE_X1 = 0,
+  BZ_OPCODE_SN = 56,
+  CLZ_UN_0_SHUN_0_OPCODE_X0 = 3,
+  CLZ_UN_0_SHUN_0_OPCODE_Y0 = 3,
+  CRC32_32_SPECIAL_0_OPCODE_X0 = 9,
+  CRC32_8_SPECIAL_0_OPCODE_X0 = 10,
+  CTZ_UN_0_SHUN_0_OPCODE_X0 = 4,
+  CTZ_UN_0_SHUN_0_OPCODE_Y0 = 4,
+  DRAIN_UN_0_SHUN_0_OPCODE_X1 = 1,
+  DTLBPR_UN_0_SHUN_0_OPCODE_X1 = 2,
+  DWORD_ALIGN_SPECIAL_0_OPCODE_X0 = 95,
+  FINV_UN_0_SHUN_0_OPCODE_X1 = 3,
+  FLUSH_UN_0_SHUN_0_OPCODE_X1 = 4,
+  FNOP_NOREG_RR_IMM_0_OPCODE_SN = 3,
+  FNOP_UN_0_SHUN_0_OPCODE_X0 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_X1 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_Y0 = 5,
+  FNOP_UN_0_SHUN_0_OPCODE_Y1 = 1,
+  HALT_NOREG_RR_IMM_0_OPCODE_SN = 0,
+  ICOH_UN_0_SHUN_0_OPCODE_X1 = 6,
+  ILL_UN_0_SHUN_0_OPCODE_X1 = 7,
+  ILL_UN_0_SHUN_0_OPCODE_Y1 = 2,
+  IMM_0_OPCODE_SN = 0,
+  IMM_0_OPCODE_X0 = 4,
+  IMM_0_OPCODE_X1 = 6,
+  IMM_1_OPCODE_SN = 1,
+  IMM_OPCODE_0_X0 = 5,
+  INTHB_SPECIAL_0_OPCODE_X0 = 11,
+  INTHB_SPECIAL_0_OPCODE_X1 = 5,
+  INTHH_SPECIAL_0_OPCODE_X0 = 12,
+  INTHH_SPECIAL_0_OPCODE_X1 = 6,
+  INTLB_SPECIAL_0_OPCODE_X0 = 13,
+  INTLB_SPECIAL_0_OPCODE_X1 = 7,
+  INTLH_SPECIAL_0_OPCODE_X0 = 14,
+  INTLH_SPECIAL_0_OPCODE_X1 = 8,
+  INV_UN_0_SHUN_0_OPCODE_X1 = 8,
+  IRET_UN_0_SHUN_0_OPCODE_X1 = 9,
+  JALB_OPCODE_X1 = 13,
+  JALF_OPCODE_X1 = 12,
+  JALRP_SPECIAL_0_OPCODE_X1 = 9,
+  JALRR_IMM_1_OPCODE_SN = 3,
+  JALR_RR_IMM_0_OPCODE_SN = 5,
+  JALR_SPECIAL_0_OPCODE_X1 = 10,
+  JB_OPCODE_X1 = 11,
+  JF_OPCODE_X1 = 10,
+  JRP_SPECIAL_0_OPCODE_X1 = 11,
+  JRR_IMM_1_OPCODE_SN = 2,
+  JR_RR_IMM_0_OPCODE_SN = 4,
+  JR_SPECIAL_0_OPCODE_X1 = 12,
+  LBADD_IMM_0_OPCODE_X1 = 22,
+  LBADD_U_IMM_0_OPCODE_X1 = 23,
+  LB_OPCODE_Y2 = 0,
+  LB_UN_0_SHUN_0_OPCODE_X1 = 10,
+  LB_U_OPCODE_Y2 = 1,
+  LB_U_UN_0_SHUN_0_OPCODE_X1 = 11,
+  LHADD_IMM_0_OPCODE_X1 = 24,
+  LHADD_U_IMM_0_OPCODE_X1 = 25,
+  LH_OPCODE_Y2 = 2,
+  LH_UN_0_SHUN_0_OPCODE_X1 = 12,
+  LH_U_OPCODE_Y2 = 3,
+  LH_U_UN_0_SHUN_0_OPCODE_X1 = 13,
+  LNK_SPECIAL_0_OPCODE_X1 = 13,
+  LWADD_IMM_0_OPCODE_X1 = 26,
+  LWADD_NA_IMM_0_OPCODE_X1 = 27,
+  LW_NA_UN_0_SHUN_0_OPCODE_X1 = 24,
+  LW_OPCODE_Y2 = 4,
+  LW_UN_0_SHUN_0_OPCODE_X1 = 14,
+  MAXB_U_SPECIAL_0_OPCODE_X0 = 15,
+  MAXB_U_SPECIAL_0_OPCODE_X1 = 14,
+  MAXH_SPECIAL_0_OPCODE_X0 = 16,
+  MAXH_SPECIAL_0_OPCODE_X1 = 15,
+  MAXIB_U_IMM_0_OPCODE_X0 = 4,
+  MAXIB_U_IMM_0_OPCODE_X1 = 5,
+  MAXIH_IMM_0_OPCODE_X0 = 5,
+  MAXIH_IMM_0_OPCODE_X1 = 6,
+  MFSPR_IMM_0_OPCODE_X1 = 7,
+  MF_UN_0_SHUN_0_OPCODE_X1 = 15,
+  MINB_U_SPECIAL_0_OPCODE_X0 = 17,
+  MINB_U_SPECIAL_0_OPCODE_X1 = 16,
+  MINH_SPECIAL_0_OPCODE_X0 = 18,
+  MINH_SPECIAL_0_OPCODE_X1 = 17,
+  MINIB_U_IMM_0_OPCODE_X0 = 6,
+  MINIB_U_IMM_0_OPCODE_X1 = 8,
+  MINIH_IMM_0_OPCODE_X0 = 7,
+  MINIH_IMM_0_OPCODE_X1 = 9,
+  MM_OPCODE_X0 = 6,
+  MM_OPCODE_X1 = 7,
+  MNZB_SPECIAL_0_OPCODE_X0 = 19,
+  MNZB_SPECIAL_0_OPCODE_X1 = 18,
+  MNZH_SPECIAL_0_OPCODE_X0 = 20,
+  MNZH_SPECIAL_0_OPCODE_X1 = 19,
+  MNZ_SPECIAL_0_OPCODE_X0 = 21,
+  MNZ_SPECIAL_0_OPCODE_X1 = 20,
+  MNZ_SPECIAL_1_OPCODE_Y0 = 0,
+  MNZ_SPECIAL_1_OPCODE_Y1 = 1,
+  MOVEI_IMM_1_OPCODE_SN = 0,
+  MOVE_RR_IMM_0_OPCODE_SN = 8,
+  MTSPR_IMM_0_OPCODE_X1 = 10,
+  MULHHA_SS_SPECIAL_0_OPCODE_X0 = 22,
+  MULHHA_SS_SPECIAL_7_OPCODE_Y0 = 0,
+  MULHHA_SU_SPECIAL_0_OPCODE_X0 = 23,
+  MULHHA_UU_SPECIAL_0_OPCODE_X0 = 24,
+  MULHHA_UU_SPECIAL_7_OPCODE_Y0 = 1,
+  MULHHSA_UU_SPECIAL_0_OPCODE_X0 = 25,
+  MULHH_SS_SPECIAL_0_OPCODE_X0 = 26,
+  MULHH_SS_SPECIAL_6_OPCODE_Y0 = 0,
+  MULHH_SU_SPECIAL_0_OPCODE_X0 = 27,
+  MULHH_UU_SPECIAL_0_OPCODE_X0 = 28,
+  MULHH_UU_SPECIAL_6_OPCODE_Y0 = 1,
+  MULHLA_SS_SPECIAL_0_OPCODE_X0 = 29,
+  MULHLA_SU_SPECIAL_0_OPCODE_X0 = 30,
+  MULHLA_US_SPECIAL_0_OPCODE_X0 = 31,
+  MULHLA_UU_SPECIAL_0_OPCODE_X0 = 32,
+  MULHLSA_UU_SPECIAL_0_OPCODE_X0 = 33,
+  MULHLSA_UU_SPECIAL_5_OPCODE_Y0 = 0,
+  MULHL_SS_SPECIAL_0_OPCODE_X0 = 34,
+  MULHL_SU_SPECIAL_0_OPCODE_X0 = 35,
+  MULHL_US_SPECIAL_0_OPCODE_X0 = 36,
+  MULHL_UU_SPECIAL_0_OPCODE_X0 = 37,
+  MULLLA_SS_SPECIAL_0_OPCODE_X0 = 38,
+  MULLLA_SS_SPECIAL_7_OPCODE_Y0 = 2,
+  MULLLA_SU_SPECIAL_0_OPCODE_X0 = 39,
+  MULLLA_UU_SPECIAL_0_OPCODE_X0 = 40,
+  MULLLA_UU_SPECIAL_7_OPCODE_Y0 = 3,
+  MULLLSA_UU_SPECIAL_0_OPCODE_X0 = 41,
+  MULLL_SS_SPECIAL_0_OPCODE_X0 = 42,
+  MULLL_SS_SPECIAL_6_OPCODE_Y0 = 2,
+  MULLL_SU_SPECIAL_0_OPCODE_X0 = 43,
+  MULLL_UU_SPECIAL_0_OPCODE_X0 = 44,
+  MULLL_UU_SPECIAL_6_OPCODE_Y0 = 3,
+  MVNZ_SPECIAL_0_OPCODE_X0 = 45,
+  MVNZ_SPECIAL_1_OPCODE_Y0 = 1,
+  MVZ_SPECIAL_0_OPCODE_X0 = 46,
+  MVZ_SPECIAL_1_OPCODE_Y0 = 2,
+  MZB_SPECIAL_0_OPCODE_X0 = 47,
+  MZB_SPECIAL_0_OPCODE_X1 = 21,
+  MZH_SPECIAL_0_OPCODE_X0 = 48,
+  MZH_SPECIAL_0_OPCODE_X1 = 22,
+  MZ_SPECIAL_0_OPCODE_X0 = 49,
+  MZ_SPECIAL_0_OPCODE_X1 = 23,
+  MZ_SPECIAL_1_OPCODE_Y0 = 3,
+  MZ_SPECIAL_1_OPCODE_Y1 = 2,
+  NAP_UN_0_SHUN_0_OPCODE_X1 = 16,
+  NOP_NOREG_RR_IMM_0_OPCODE_SN = 2,
+  NOP_UN_0_SHUN_0_OPCODE_X0 = 6,
+  NOP_UN_0_SHUN_0_OPCODE_X1 = 17,
+  NOP_UN_0_SHUN_0_OPCODE_Y0 = 6,
+  NOP_UN_0_SHUN_0_OPCODE_Y1 = 3,
+  NOREG_RR_IMM_0_OPCODE_SN = 0,
+  NOR_SPECIAL_0_OPCODE_X0 = 50,
+  NOR_SPECIAL_0_OPCODE_X1 = 24,
+  NOR_SPECIAL_2_OPCODE_Y0 = 1,
+  NOR_SPECIAL_2_OPCODE_Y1 = 1,
+  ORI_IMM_0_OPCODE_X0 = 8,
+  ORI_IMM_0_OPCODE_X1 = 11,
+  ORI_OPCODE_Y0 = 11,
+  ORI_OPCODE_Y1 = 9,
+  OR_SPECIAL_0_OPCODE_X0 = 51,
+  OR_SPECIAL_0_OPCODE_X1 = 25,
+  OR_SPECIAL_2_OPCODE_Y0 = 2,
+  OR_SPECIAL_2_OPCODE_Y1 = 2,
+  PACKBS_U_SPECIAL_0_OPCODE_X0 = 103,
+  PACKBS_U_SPECIAL_0_OPCODE_X1 = 73,
+  PACKHB_SPECIAL_0_OPCODE_X0 = 52,
+  PACKHB_SPECIAL_0_OPCODE_X1 = 26,
+  PACKHS_SPECIAL_0_OPCODE_X0 = 102,
+  PACKHS_SPECIAL_0_OPCODE_X1 = 72,
+  PACKLB_SPECIAL_0_OPCODE_X0 = 53,
+  PACKLB_SPECIAL_0_OPCODE_X1 = 27,
+  PCNT_UN_0_SHUN_0_OPCODE_X0 = 7,
+  PCNT_UN_0_SHUN_0_OPCODE_Y0 = 7,
+  RLI_SHUN_0_OPCODE_X0 = 1,
+  RLI_SHUN_0_OPCODE_X1 = 1,
+  RLI_SHUN_0_OPCODE_Y0 = 1,
+  RLI_SHUN_0_OPCODE_Y1 = 1,
+  RL_SPECIAL_0_OPCODE_X0 = 54,
+  RL_SPECIAL_0_OPCODE_X1 = 28,
+  RL_SPECIAL_3_OPCODE_Y0 = 0,
+  RL_SPECIAL_3_OPCODE_Y1 = 0,
+  RR_IMM_0_OPCODE_SN = 0,
+  S1A_SPECIAL_0_OPCODE_X0 = 55,
+  S1A_SPECIAL_0_OPCODE_X1 = 29,
+  S1A_SPECIAL_0_OPCODE_Y0 = 1,
+  S1A_SPECIAL_0_OPCODE_Y1 = 1,
+  S2A_SPECIAL_0_OPCODE_X0 = 56,
+  S2A_SPECIAL_0_OPCODE_X1 = 30,
+  S2A_SPECIAL_0_OPCODE_Y0 = 2,
+  S2A_SPECIAL_0_OPCODE_Y1 = 2,
+  S3A_SPECIAL_0_OPCODE_X0 = 57,
+  S3A_SPECIAL_0_OPCODE_X1 = 31,
+  S3A_SPECIAL_5_OPCODE_Y0 = 1,
+  S3A_SPECIAL_5_OPCODE_Y1 = 1,
+  SADAB_U_SPECIAL_0_OPCODE_X0 = 58,
+  SADAH_SPECIAL_0_OPCODE_X0 = 59,
+  SADAH_U_SPECIAL_0_OPCODE_X0 = 60,
+  SADB_U_SPECIAL_0_OPCODE_X0 = 61,
+  SADH_SPECIAL_0_OPCODE_X0 = 62,
+  SADH_U_SPECIAL_0_OPCODE_X0 = 63,
+  SBADD_IMM_0_OPCODE_X1 = 28,
+  SB_OPCODE_Y2 = 5,
+  SB_SPECIAL_0_OPCODE_X1 = 32,
+  SEQB_SPECIAL_0_OPCODE_X0 = 64,
+  SEQB_SPECIAL_0_OPCODE_X1 = 33,
+  SEQH_SPECIAL_0_OPCODE_X0 = 65,
+  SEQH_SPECIAL_0_OPCODE_X1 = 34,
+  SEQIB_IMM_0_OPCODE_X0 = 9,
+  SEQIB_IMM_0_OPCODE_X1 = 12,
+  SEQIH_IMM_0_OPCODE_X0 = 10,
+  SEQIH_IMM_0_OPCODE_X1 = 13,
+  SEQI_IMM_0_OPCODE_X0 = 11,
+  SEQI_IMM_0_OPCODE_X1 = 14,
+  SEQI_OPCODE_Y0 = 12,
+  SEQI_OPCODE_Y1 = 10,
+  SEQ_SPECIAL_0_OPCODE_X0 = 66,
+  SEQ_SPECIAL_0_OPCODE_X1 = 35,
+  SEQ_SPECIAL_5_OPCODE_Y0 = 2,
+  SEQ_SPECIAL_5_OPCODE_Y1 = 2,
+  SHADD_IMM_0_OPCODE_X1 = 29,
+  SHL8II_IMM_0_OPCODE_SN = 3,
+  SHLB_SPECIAL_0_OPCODE_X0 = 67,
+  SHLB_SPECIAL_0_OPCODE_X1 = 36,
+  SHLH_SPECIAL_0_OPCODE_X0 = 68,
+  SHLH_SPECIAL_0_OPCODE_X1 = 37,
+  SHLIB_SHUN_0_OPCODE_X0 = 2,
+  SHLIB_SHUN_0_OPCODE_X1 = 2,
+  SHLIH_SHUN_0_OPCODE_X0 = 3,
+  SHLIH_SHUN_0_OPCODE_X1 = 3,
+  SHLI_SHUN_0_OPCODE_X0 = 4,
+  SHLI_SHUN_0_OPCODE_X1 = 4,
+  SHLI_SHUN_0_OPCODE_Y0 = 2,
+  SHLI_SHUN_0_OPCODE_Y1 = 2,
+  SHL_SPECIAL_0_OPCODE_X0 = 69,
+  SHL_SPECIAL_0_OPCODE_X1 = 38,
+  SHL_SPECIAL_3_OPCODE_Y0 = 1,
+  SHL_SPECIAL_3_OPCODE_Y1 = 1,
+  SHR1_RR_IMM_0_OPCODE_SN = 9,
+  SHRB_SPECIAL_0_OPCODE_X0 = 70,
+  SHRB_SPECIAL_0_OPCODE_X1 = 39,
+  SHRH_SPECIAL_0_OPCODE_X0 = 71,
+  SHRH_SPECIAL_0_OPCODE_X1 = 40,
+  SHRIB_SHUN_0_OPCODE_X0 = 5,
+  SHRIB_SHUN_0_OPCODE_X1 = 5,
+  SHRIH_SHUN_0_OPCODE_X0 = 6,
+  SHRIH_SHUN_0_OPCODE_X1 = 6,
+  SHRI_SHUN_0_OPCODE_X0 = 7,
+  SHRI_SHUN_0_OPCODE_X1 = 7,
+  SHRI_SHUN_0_OPCODE_Y0 = 3,
+  SHRI_SHUN_0_OPCODE_Y1 = 3,
+  SHR_SPECIAL_0_OPCODE_X0 = 72,
+  SHR_SPECIAL_0_OPCODE_X1 = 41,
+  SHR_SPECIAL_3_OPCODE_Y0 = 2,
+  SHR_SPECIAL_3_OPCODE_Y1 = 2,
+  SHUN_0_OPCODE_X0 = 7,
+  SHUN_0_OPCODE_X1 = 8,
+  SHUN_0_OPCODE_Y0 = 13,
+  SHUN_0_OPCODE_Y1 = 11,
+  SH_OPCODE_Y2 = 6,
+  SH_SPECIAL_0_OPCODE_X1 = 42,
+  SLTB_SPECIAL_0_OPCODE_X0 = 73,
+  SLTB_SPECIAL_0_OPCODE_X1 = 43,
+  SLTB_U_SPECIAL_0_OPCODE_X0 = 74,
+  SLTB_U_SPECIAL_0_OPCODE_X1 = 44,
+  SLTEB_SPECIAL_0_OPCODE_X0 = 75,
+  SLTEB_SPECIAL_0_OPCODE_X1 = 45,
+  SLTEB_U_SPECIAL_0_OPCODE_X0 = 76,
+  SLTEB_U_SPECIAL_0_OPCODE_X1 = 46,
+  SLTEH_SPECIAL_0_OPCODE_X0 = 77,
+  SLTEH_SPECIAL_0_OPCODE_X1 = 47,
+  SLTEH_U_SPECIAL_0_OPCODE_X0 = 78,
+  SLTEH_U_SPECIAL_0_OPCODE_X1 = 48,
+  SLTE_SPECIAL_0_OPCODE_X0 = 79,
+  SLTE_SPECIAL_0_OPCODE_X1 = 49,
+  SLTE_SPECIAL_4_OPCODE_Y0 = 0,
+  SLTE_SPECIAL_4_OPCODE_Y1 = 0,
+  SLTE_U_SPECIAL_0_OPCODE_X0 = 80,
+  SLTE_U_SPECIAL_0_OPCODE_X1 = 50,
+  SLTE_U_SPECIAL_4_OPCODE_Y0 = 1,
+  SLTE_U_SPECIAL_4_OPCODE_Y1 = 1,
+  SLTH_SPECIAL_0_OPCODE_X0 = 81,
+  SLTH_SPECIAL_0_OPCODE_X1 = 51,
+  SLTH_U_SPECIAL_0_OPCODE_X0 = 82,
+  SLTH_U_SPECIAL_0_OPCODE_X1 = 52,
+  SLTIB_IMM_0_OPCODE_X0 = 12,
+  SLTIB_IMM_0_OPCODE_X1 = 15,
+  SLTIB_U_IMM_0_OPCODE_X0 = 13,
+  SLTIB_U_IMM_0_OPCODE_X1 = 16,
+  SLTIH_IMM_0_OPCODE_X0 = 14,
+  SLTIH_IMM_0_OPCODE_X1 = 17,
+  SLTIH_U_IMM_0_OPCODE_X0 = 15,
+  SLTIH_U_IMM_0_OPCODE_X1 = 18,
+  SLTI_IMM_0_OPCODE_X0 = 16,
+  SLTI_IMM_0_OPCODE_X1 = 19,
+  SLTI_OPCODE_Y0 = 14,
+  SLTI_OPCODE_Y1 = 12,
+  SLTI_U_IMM_0_OPCODE_X0 = 17,
+  SLTI_U_IMM_0_OPCODE_X1 = 20,
+  SLTI_U_OPCODE_Y0 = 15,
+  SLTI_U_OPCODE_Y1 = 13,
+  SLT_SPECIAL_0_OPCODE_X0 = 83,
+  SLT_SPECIAL_0_OPCODE_X1 = 53,
+  SLT_SPECIAL_4_OPCODE_Y0 = 2,
+  SLT_SPECIAL_4_OPCODE_Y1 = 2,
+  SLT_U_SPECIAL_0_OPCODE_X0 = 84,
+  SLT_U_SPECIAL_0_OPCODE_X1 = 54,
+  SLT_U_SPECIAL_4_OPCODE_Y0 = 3,
+  SLT_U_SPECIAL_4_OPCODE_Y1 = 3,
+  SNEB_SPECIAL_0_OPCODE_X0 = 85,
+  SNEB_SPECIAL_0_OPCODE_X1 = 55,
+  SNEH_SPECIAL_0_OPCODE_X0 = 86,
+  SNEH_SPECIAL_0_OPCODE_X1 = 56,
+  SNE_SPECIAL_0_OPCODE_X0 = 87,
+  SNE_SPECIAL_0_OPCODE_X1 = 57,
+  SNE_SPECIAL_5_OPCODE_Y0 = 3,
+  SNE_SPECIAL_5_OPCODE_Y1 = 3,
+  SPECIAL_0_OPCODE_X0 = 0,
+  SPECIAL_0_OPCODE_X1 = 1,
+  SPECIAL_0_OPCODE_Y0 = 1,
+  SPECIAL_0_OPCODE_Y1 = 1,
+  SPECIAL_1_OPCODE_Y0 = 2,
+  SPECIAL_1_OPCODE_Y1 = 2,
+  SPECIAL_2_OPCODE_Y0 = 3,
+  SPECIAL_2_OPCODE_Y1 = 3,
+  SPECIAL_3_OPCODE_Y0 = 4,
+  SPECIAL_3_OPCODE_Y1 = 4,
+  SPECIAL_4_OPCODE_Y0 = 5,
+  SPECIAL_4_OPCODE_Y1 = 5,
+  SPECIAL_5_OPCODE_Y0 = 6,
+  SPECIAL_5_OPCODE_Y1 = 6,
+  SPECIAL_6_OPCODE_Y0 = 7,
+  SPECIAL_7_OPCODE_Y0 = 8,
+  SRAB_SPECIAL_0_OPCODE_X0 = 88,
+  SRAB_SPECIAL_0_OPCODE_X1 = 58,
+  SRAH_SPECIAL_0_OPCODE_X0 = 89,
+  SRAH_SPECIAL_0_OPCODE_X1 = 59,
+  SRAIB_SHUN_0_OPCODE_X0 = 8,
+  SRAIB_SHUN_0_OPCODE_X1 = 8,
+  SRAIH_SHUN_0_OPCODE_X0 = 9,
+  SRAIH_SHUN_0_OPCODE_X1 = 9,
+  SRAI_SHUN_0_OPCODE_X0 = 10,
+  SRAI_SHUN_0_OPCODE_X1 = 10,
+  SRAI_SHUN_0_OPCODE_Y0 = 4,
+  SRAI_SHUN_0_OPCODE_Y1 = 4,
+  SRA_SPECIAL_0_OPCODE_X0 = 90,
+  SRA_SPECIAL_0_OPCODE_X1 = 60,
+  SRA_SPECIAL_3_OPCODE_Y0 = 3,
+  SRA_SPECIAL_3_OPCODE_Y1 = 3,
+  SUBBS_U_SPECIAL_0_OPCODE_X0 = 100,
+  SUBBS_U_SPECIAL_0_OPCODE_X1 = 70,
+  SUBB_SPECIAL_0_OPCODE_X0 = 91,
+  SUBB_SPECIAL_0_OPCODE_X1 = 61,
+  SUBHS_SPECIAL_0_OPCODE_X0 = 101,
+  SUBHS_SPECIAL_0_OPCODE_X1 = 71,
+  SUBH_SPECIAL_0_OPCODE_X0 = 92,
+  SUBH_SPECIAL_0_OPCODE_X1 = 62,
+  SUBS_SPECIAL_0_OPCODE_X0 = 97,
+  SUBS_SPECIAL_0_OPCODE_X1 = 67,
+  SUB_SPECIAL_0_OPCODE_X0 = 93,
+  SUB_SPECIAL_0_OPCODE_X1 = 63,
+  SUB_SPECIAL_0_OPCODE_Y0 = 3,
+  SUB_SPECIAL_0_OPCODE_Y1 = 3,
+  SWADD_IMM_0_OPCODE_X1 = 30,
+  SWINT0_UN_0_SHUN_0_OPCODE_X1 = 18,
+  SWINT1_UN_0_SHUN_0_OPCODE_X1 = 19,
+  SWINT2_UN_0_SHUN_0_OPCODE_X1 = 20,
+  SWINT3_UN_0_SHUN_0_OPCODE_X1 = 21,
+  SW_OPCODE_Y2 = 7,
+  SW_SPECIAL_0_OPCODE_X1 = 64,
+  TBLIDXB0_UN_0_SHUN_0_OPCODE_X0 = 8,
+  TBLIDXB0_UN_0_SHUN_0_OPCODE_Y0 = 8,
+  TBLIDXB1_UN_0_SHUN_0_OPCODE_X0 = 9,
+  TBLIDXB1_UN_0_SHUN_0_OPCODE_Y0 = 9,
+  TBLIDXB2_UN_0_SHUN_0_OPCODE_X0 = 10,
+  TBLIDXB2_UN_0_SHUN_0_OPCODE_Y0 = 10,
+  TBLIDXB3_UN_0_SHUN_0_OPCODE_X0 = 11,
+  TBLIDXB3_UN_0_SHUN_0_OPCODE_Y0 = 11,
+  TNS_UN_0_SHUN_0_OPCODE_X1 = 22,
+  UN_0_SHUN_0_OPCODE_X0 = 11,
+  UN_0_SHUN_0_OPCODE_X1 = 11,
+  UN_0_SHUN_0_OPCODE_Y0 = 5,
+  UN_0_SHUN_0_OPCODE_Y1 = 5,
+  WH64_UN_0_SHUN_0_OPCODE_X1 = 23,
+  XORI_IMM_0_OPCODE_X0 = 2,
+  XORI_IMM_0_OPCODE_X1 = 21,
+  XOR_SPECIAL_0_OPCODE_X0 = 94,
+  XOR_SPECIAL_0_OPCODE_X1 = 65,
+  XOR_SPECIAL_2_OPCODE_Y0 = 3,
+  XOR_SPECIAL_2_OPCODE_Y1 = 3
+};
+
+#endif /* !_TILE_OPCODE_CONSTANTS_H */
diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h
new file mode 100644
index 000000000000..7d90641cf18d
--- /dev/null
+++ b/arch/tile/include/asm/page.h
@@ -0,0 +1,343 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PAGE_H
+#define _ASM_TILE_PAGE_H
+
+#include <linux/const.h>
+
+/* PAGE_SHIFT and HPAGE_SHIFT determine the page sizes. */
+#define PAGE_SHIFT      16
+#define HPAGE_SHIFT     24
+
+#define PAGE_SIZE       (_AC(1, UL) << PAGE_SHIFT)
+#define HPAGE_SIZE      (_AC(1, UL) << HPAGE_SHIFT)
+
+#define PAGE_MASK       (~(PAGE_SIZE - 1))
+#define HPAGE_MASK      (~(HPAGE_SIZE - 1))
+
+#ifdef __KERNEL__
+
+#include <hv/hypervisor.h>
+#include <arch/chip.h>
+
+/*
+ * The {,H}PAGE_SHIFT values must match the HV_LOG2_PAGE_SIZE_xxx
+ * definitions in <hv/hypervisor.h>.  We validate this at build time
+ * here, and again at runtime during early boot.  We provide a
+ * separate definition since userspace doesn't have <hv/hypervisor.h>.
+ *
+ * Be careful to distinguish PAGE_SHIFT from HV_PTE_INDEX_PFN, since
+ * they are the same on i386 but not TILE.
+ */
+#if HV_LOG2_PAGE_SIZE_SMALL != PAGE_SHIFT
+# error Small page size mismatch in Linux
+#endif
+#if HV_LOG2_PAGE_SIZE_LARGE != HPAGE_SHIFT
+# error Huge page size mismatch in Linux
+#endif
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <linux/string.h>
+
+struct page;
+
+static inline void clear_page(void *page)
+{
+        memset(page, 0, PAGE_SIZE);
+}
+
+static inline void copy_page(void *to, void *from)
+{
+        memcpy(to, from, PAGE_SIZE);
+}
+
+static inline void clear_user_page(void *page, unsigned long vaddr,
+                                struct page *pg)
+{
+        clear_page(page);
+}
+
+static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
+                                struct page *topage)
+{
+        copy_page(to, from);
+}
+
+/*
+ * Hypervisor page tables are made of the same basic structure.
+ */
+
+typedef __u64 pteval_t;
+typedef __u64 pmdval_t;
+typedef __u64 pudval_t;
+typedef __u64 pgdval_t;
+typedef __u64 pgprotval_t;
+
+typedef HV_PTE pte_t;
+typedef HV_PTE pgd_t;
+typedef HV_PTE pgprot_t;
+
+/*
+ * User L2 page tables are managed as one L2 page table per page,
+ * because we use the page allocator for them.  This keeps the allocation
+ * simple and makes it potentially useful to implement HIGHPTE at some point.
+ * However, it's also inefficient, since L2 page tables are much smaller
+ * than pages (currently 2KB vs 64KB).  So we should revisit this.
+ */
+typedef struct page *pgtable_t;
+
+/* Must be a macro since it is used to create constants. */
+#define __pgprot(val) hv_pte(val)
+
+static inline u64 pgprot_val(pgprot_t pgprot)
+{
+        return hv_pte_val(pgprot);
+}
+
+static inline u64 pte_val(pte_t pte)
+{
+        return hv_pte_val(pte);
+}
+
+static inline u64 pgd_val(pgd_t pgd)
+{
+        return hv_pte_val(pgd);
+}
+
+#ifdef __tilegx__
+
+typedef HV_PTE pmd_t;
+
+static inline u64 pmd_val(pmd_t pmd)
+{
+        return hv_pte_val(pmd);
+}
+
+#endif
+
+static inline __attribute_const__ int get_order(unsigned long size)
+{
+        return BITS_PER_LONG - __builtin_clzl((size - 1) >> PAGE_SHIFT);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+
+#define HUGE_MAX_HSTATE         2
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+#endif
+
+/* Each memory controller has PAs distinct in their high bits. */
+#define NR_PA_HIGHBIT_SHIFT (CHIP_PA_WIDTH() - CHIP_LOG_NUM_MSHIMS())
+#define NR_PA_HIGHBIT_VALUES (1 << CHIP_LOG_NUM_MSHIMS())
+#define __pa_to_highbits(pa) ((phys_addr_t)(pa) >> NR_PA_HIGHBIT_SHIFT)
+#define __pfn_to_highbits(pfn) ((pfn) >> (NR_PA_HIGHBIT_SHIFT - PAGE_SHIFT))
+
+#ifdef __tilegx__
+
+/*
+ * We reserve the lower half of memory for user-space programs, and the
+ * upper half for system code.  We re-map all of physical memory in the
+ * upper half, which takes a quarter of our VA space.  Then we have
+ * the vmalloc regions.  The supervisor code lives at 0xfffffff700000000,
+ * with the hypervisor above that.
+ *
+ * Loadable kernel modules are placed immediately after the static
+ * supervisor code, with each being allocated a 256MB region of
+ * address space, so we don't have to worry about the range of "jal"
+ * and other branch instructions.
+ *
+ * For now we keep life simple and just allocate one pmd (4GB) for vmalloc.
+ * Similarly, for now we don't play any struct page mapping games.
+ */
+
+#if CHIP_PA_WIDTH() + 2 > CHIP_VA_WIDTH()
+# error Too much PA to map with the VA available!
+#endif
+#define HALF_VA_SPACE           (_AC(1, UL) << (CHIP_VA_WIDTH() - 1))
+
+#define MEM_LOW_END             (HALF_VA_SPACE - 1)         /* low half */
+#define MEM_HIGH_START          (-HALF_VA_SPACE)            /* high half */
+#define PAGE_OFFSET             MEM_HIGH_START
+#define _VMALLOC_START          _AC(0xfffffff500000000, UL) /* 4 GB */
+#define HUGE_VMAP_BASE          _AC(0xfffffff600000000, UL) /* 4 GB */
+#define MEM_SV_START            _AC(0xfffffff700000000, UL) /* 256 MB */
+#define MEM_SV_INTRPT           MEM_SV_START
+#define MEM_MODULE_START        _AC(0xfffffff710000000, UL) /* 256 MB */
+#define MEM_MODULE_END          (MEM_MODULE_START + (256*1024*1024))
+#define MEM_HV_START            _AC(0xfffffff800000000, UL) /* 32 GB */
+
+/* Highest DTLB address we will use */
+#define KERNEL_HIGH_VADDR       MEM_SV_START
+
+/* Since we don't currently provide any fixmaps, we use an impossible VA. */
+#define FIXADDR_TOP             MEM_HV_START
+
+#else /* !__tilegx__ */
+
+/*
+ * A PAGE_OFFSET of 0xC0000000 means that the kernel has
+ * a virtual address space of one gigabyte, which limits the
+ * amount of physical memory you can use to about 768MB.
+ * If you want more physical memory than this then see the CONFIG_HIGHMEM
+ * option in the kernel configuration.
+ *
+ * The top two 16MB chunks in the table below (VIRT and HV) are
+ * unavailable to Linux.  Since the kernel interrupt vectors must live
+ * at 0xfd000000, we map all of the bottom of RAM at this address with
+ * a huge page table entry to minimize its ITLB footprint (as well as
+ * at PAGE_OFFSET).  The last architected requirement is that user
+ * interrupt vectors live at 0xfc000000, so we make that range of
+ * memory available to user processes.  The remaining regions are sized
+ * as shown; after the first four addresses, we show "typical" values,
+ * since the actual addresses depend on kernel #defines.
+ *
+ * MEM_VIRT_INTRPT                 0xff000000
+ * MEM_HV_INTRPT                   0xfe000000
+ * MEM_SV_INTRPT (kernel code)     0xfd000000
+ * MEM_USER_INTRPT (user vector)   0xfc000000
+ * FIX_KMAP_xxx                    0xf8000000 (via NR_CPUS * KM_TYPE_NR)
+ * PKMAP_BASE                      0xf7000000 (via LAST_PKMAP)
+ * HUGE_VMAP                       0xf3000000 (via CONFIG_NR_HUGE_VMAPS)
+ * VMALLOC_START                   0xf0000000 (via __VMALLOC_RESERVE)
+ * mapped LOWMEM                   0xc0000000
+ */
+
+#define MEM_USER_INTRPT         _AC(0xfc000000, UL)
+#define MEM_SV_INTRPT           _AC(0xfd000000, UL)
+#define MEM_HV_INTRPT           _AC(0xfe000000, UL)
+#define MEM_VIRT_INTRPT         _AC(0xff000000, UL)
+
+#define INTRPT_SIZE             0x4000
+
+/* Tolerate page size larger than the architecture interrupt region size. */
+#if PAGE_SIZE > INTRPT_SIZE
+#undef INTRPT_SIZE
+#define INTRPT_SIZE PAGE_SIZE
+#endif
+
+#define KERNEL_HIGH_VADDR       MEM_USER_INTRPT
+#define FIXADDR_TOP             (KERNEL_HIGH_VADDR - PAGE_SIZE)
+
+#define PAGE_OFFSET             _AC(CONFIG_PAGE_OFFSET, UL)
+
+/* On 32-bit architectures we mix kernel modules in with other vmaps. */
+#define MEM_MODULE_START        VMALLOC_START
+#define MEM_MODULE_END          VMALLOC_END
+
+#endif /* __tilegx__ */
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_HIGHMEM
+
+/* Map kernel virtual addresses to page frames, in HPAGE_SIZE chunks. */
+extern unsigned long pbase_map[];
+extern void *vbase_map[];
+
+static inline unsigned long kaddr_to_pfn(const volatile void *_kaddr)
+{
+        unsigned long kaddr = (unsigned long)_kaddr;
+        return pbase_map[kaddr >> HPAGE_SHIFT] +
+                ((kaddr & (HPAGE_SIZE - 1)) >> PAGE_SHIFT);
+}
+
+static inline void *pfn_to_kaddr(unsigned long pfn)
+{
+        return vbase_map[__pfn_to_highbits(pfn)] + (pfn << PAGE_SHIFT);
+}
+
+static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
+{
+        unsigned long pfn = kaddr_to_pfn(kaddr);
+        return ((phys_addr_t)pfn << PAGE_SHIFT) +
+                ((unsigned long)kaddr & (PAGE_SIZE-1));
+}
+
+static inline void *phys_to_virt(phys_addr_t paddr)
+{
+        return pfn_to_kaddr(paddr >> PAGE_SHIFT) + (paddr & (PAGE_SIZE-1));
+}
+
+/* With HIGHMEM, we pack PAGE_OFFSET through high_memory with all valid VAs. */
+static inline int virt_addr_valid(const volatile void *kaddr)
+{
+        extern void *high_memory;  /* copied from <linux/mm.h> */
+        return ((unsigned long)kaddr >= PAGE_OFFSET && kaddr < high_memory);
+}
+
+#else /* !CONFIG_HIGHMEM */
+
+static inline unsigned long kaddr_to_pfn(const volatile void *kaddr)
+{
+        return ((unsigned long)kaddr - PAGE_OFFSET) >> PAGE_SHIFT;
+}
+
+static inline void *pfn_to_kaddr(unsigned long pfn)
+{
+        return (void *)((pfn << PAGE_SHIFT) + PAGE_OFFSET);
+}
+
+static inline phys_addr_t virt_to_phys(const volatile void *kaddr)
+{
+        return (phys_addr_t)((unsigned long)kaddr - PAGE_OFFSET);
+}
+
+static inline void *phys_to_virt(phys_addr_t paddr)
+{
+        return (void *)((unsigned long)paddr + PAGE_OFFSET);
+}
+
+/* Check that the given address is within some mapped range of PAs. */
+#define virt_addr_valid(kaddr) pfn_valid(kaddr_to_pfn(kaddr))
+
+#endif /* !CONFIG_HIGHMEM */
+
+/* All callers are not consistent in how they call these functions. */
+#define __pa(kaddr) virt_to_phys((void *)(unsigned long)(kaddr))
+#define __va(paddr) phys_to_virt((phys_addr_t)(paddr))
+
+extern int devmem_is_allowed(unsigned long pagenr);
+
+#ifdef CONFIG_FLATMEM
+static inline int pfn_valid(unsigned long pfn)
+{
+        return pfn < max_mapnr;
+}
+#endif
+
+/* Provide as macros since these require some other headers included. */
+#define page_to_pa(page) ((phys_addr_t)(page_to_pfn(page)) << PAGE_SHIFT)
+#define virt_to_page(kaddr) pfn_to_page(kaddr_to_pfn(kaddr))
+#define page_to_virt(page) pfn_to_kaddr(page_to_pfn(page))
+
+struct mm_struct;
+extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
+
+#endif /* !__ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS \
+        (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_TILE_PAGE_H */
diff --git a/arch/tile/include/asm/param.h b/arch/tile/include/asm/param.h
new file mode 100644
index 000000000000..965d45427975
--- /dev/null
+++ b/arch/tile/include/asm/param.h
@@ -0,0 +1 @@
+#include <asm-generic/param.h>
diff --git a/arch/tile/include/asm/pci-bridge.h b/arch/tile/include/asm/pci-bridge.h
new file mode 100644
index 000000000000..e853b0e2793b
--- /dev/null
+++ b/arch/tile/include/asm/pci-bridge.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PCI_BRIDGE_H
+#define _ASM_TILE_PCI_BRIDGE_H
+
+#include <linux/ioport.h>
+#include <linux/pci.h>
+
+struct device_node;
+struct pci_controller;
+
+/*
+ * pci_io_base returns the memory address at which you can access
+ * the I/O space for PCI bus number `bus' (or NULL on error).
+ */
+extern void __iomem *pci_bus_io_base(unsigned int bus);
+extern unsigned long pci_bus_io_base_phys(unsigned int bus);
+extern unsigned long pci_bus_mem_base_phys(unsigned int bus);
+
+/* Allocate a new PCI host bridge structure */
+extern struct pci_controller *pcibios_alloc_controller(void);
+
+/* Helper function for setting up resources */
+extern void pci_init_resource(struct resource *res, unsigned long start,
+                              unsigned long end, int flags, char *name);
+
+/* Get the PCI host controller for a bus */
+extern struct pci_controller *pci_bus_to_hose(int bus);
+
+/*
+ * Structure of a PCI controller (host bridge)
+ */
+struct pci_controller {
+        int index;              /* PCI domain number */
+        struct pci_bus *root_bus;
+
+        int first_busno;
+        int last_busno;
+
+        int hv_cfg_fd[2];       /* config{0,1} fds for this PCIe controller */
+        int hv_mem_fd;          /* fd to Hypervisor for MMIO operations */
+
+        struct pci_ops *ops;
+
+        int irq_base;           /* Base IRQ from the Hypervisor */
+        int plx_gen1;           /* flag for PLX Gen 1 configuration */
+
+        /* Address ranges that are routed to this controller/bridge. */
+        struct resource mem_resources[3];
+};
+
+static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
+{
+        return bus->sysdata;
+}
+
+extern void setup_indirect_pci_nomap(struct pci_controller *hose,
+                               void __iomem *cfg_addr, void __iomem *cfg_data);
+extern void setup_indirect_pci(struct pci_controller *hose,
+                               u32 cfg_addr, u32 cfg_data);
+extern void setup_grackle(struct pci_controller *hose);
+
+extern unsigned char common_swizzle(struct pci_dev *, unsigned char *);
+
+/*
+ *   The following code swizzles for exactly one bridge.  The routine
+ *   common_swizzle below handles multiple bridges.  But there are a
+ *   some boards that don't follow the PCI spec's suggestion so we
+ *   break this piece out separately.
+ */
+static inline unsigned char bridge_swizzle(unsigned char pin,
+                unsigned char idsel)
+{
+        return (((pin-1) + idsel) % 4) + 1;
+}
+
+/*
+ * The following macro is used to lookup irqs in a standard table
+ * format for those PPC systems that do not already have PCI
+ * interrupts properly routed.
+ */
+/* FIXME - double check this */
+#define PCI_IRQ_TABLE_LOOKUP ({ \
+        long _ctl_ = -1; \
+        if (idsel >= min_idsel && idsel <= max_idsel && pin <= irqs_per_slot) \
+                _ctl_ = pci_irq_table[idsel - min_idsel][pin-1]; \
+        _ctl_; \
+})
+
+/*
+ * Scan the buses below a given PCI host bridge and assign suitable
+ * resources to all devices found.
+ */
+extern int pciauto_bus_scan(struct pci_controller *, int);
+
+#ifdef CONFIG_PCI
+extern unsigned long pci_address_to_pio(phys_addr_t address);
+#else
+static inline unsigned long pci_address_to_pio(phys_addr_t address)
+{
+        return (unsigned long)-1;
+}
+#endif
+
+#endif /* _ASM_TILE_PCI_BRIDGE_H */
diff --git a/arch/tile/include/asm/pci.h b/arch/tile/include/asm/pci.h
new file mode 100644
index 000000000000..b0c15da2d5d5
--- /dev/null
+++ b/arch/tile/include/asm/pci.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PCI_H
+#define _ASM_TILE_PCI_H
+
+#include <asm/pci-bridge.h>
+
+/*
+ * The hypervisor maps the entirety of CPA-space as bus addresses, so
+ * bus addresses are physical addresses.  The networking and block
+ * device layers use this boolean for bounce buffer decisions.
+ */
+#define PCI_DMA_BUS_IS_PHYS     1
+
+struct pci_controller *pci_bus_to_hose(int bus);
+unsigned char __init common_swizzle(struct pci_dev *dev, unsigned char *pinp);
+int __init tile_pci_init(void);
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
+void __devinit pcibios_fixup_bus(struct pci_bus *bus);
+
+int __devinit _tile_cfg_read(struct pci_controller *hose,
+                                    int bus,
+                                    int slot,
+                                    int function,
+                                    int offset,
+                                    int size,
+                                    u32 *val);
+int __devinit _tile_cfg_write(struct pci_controller *hose,
+                                     int bus,
+                                     int slot,
+                                     int function,
+                                     int offset,
+                                     int size,
+                                     u32 val);
+
+/*
+ * These are used to to config reads and writes in the early stages of
+ * setup before the driver infrastructure has been set up enough to be
+ * able to do config reads and writes.
+ */
+#define early_cfg_read(where, size, value) \
+        _tile_cfg_read(controller, \
+                       current_bus, \
+                       pci_slot, \
+                       pci_fn, \
+                       where, \
+                       size, \
+                       value)
+
+#define early_cfg_write(where, size, value) \
+        _tile_cfg_write(controller, \
+                       current_bus, \
+                       pci_slot, \
+                       pci_fn, \
+                       where, \
+                       size, \
+                       value)
+
+
+
+#define PCICFG_BYTE     1
+#define PCICFG_WORD     2
+#define PCICFG_DWORD    4
+
+#define TILE_NUM_PCIE   2
+
+#define pci_domain_nr(bus) (((struct pci_controller *)(bus)->sysdata)->index)
+
+/*
+ * This decides whether to display the domain number in /proc.
+ */
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+        return 1;
+}
+
+/*
+ * I/O space is currently not supported.
+ */
+
+#define TILE_PCIE_LOWER_IO              0x0
+#define TILE_PCIE_UPPER_IO              0x10000
+#define TILE_PCIE_PCIE_IO_SIZE          0x0000FFFF
+
+#define _PAGE_NO_CACHE          0
+#define _PAGE_GUARDED           0
+
+
+#define pcibios_assign_all_busses()    pci_assign_all_buses
+extern int pci_assign_all_buses;
+
+static inline void pcibios_set_master(struct pci_dev *dev)
+{
+        /* No special bus mastering setup handling */
+}
+
+#define PCIBIOS_MIN_MEM         0
+#define PCIBIOS_MIN_IO          TILE_PCIE_LOWER_IO
+
+/*
+ * This flag tells if the platform is TILEmpower that needs
+ * special configuration for the PLX switch chip.
+ */
+extern int blade_pci;
+
+/* implement the pci_ DMA API in terms of the generic device dma_ one */
+#include <asm-generic/pci-dma-compat.h>
+
+/* generic pci stuff */
+#include <asm-generic/pci.h>
+
+/* Use any cpu for PCI. */
+#define cpumask_of_pcibus(bus) cpu_online_mask
+
+#endif /* _ASM_TILE_PCI_H */
diff --git a/arch/tile/include/asm/percpu.h b/arch/tile/include/asm/percpu.h
new file mode 100644
index 000000000000..63294f5a8efb
--- /dev/null
+++ b/arch/tile/include/asm/percpu.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PERCPU_H
+#define _ASM_TILE_PERCPU_H
+
+register unsigned long __my_cpu_offset __asm__("tp");
+#define __my_cpu_offset __my_cpu_offset
+#define set_my_cpu_offset(tp) (__my_cpu_offset = (tp))
+
+#include <asm-generic/percpu.h>
+
+#endif /* _ASM_TILE_PERCPU_H */
diff --git a/arch/tile/include/asm/pgalloc.h b/arch/tile/include/asm/pgalloc.h
new file mode 100644
index 000000000000..cf52791a5501
--- /dev/null
+++ b/arch/tile/include/asm/pgalloc.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PGALLOC_H
+#define _ASM_TILE_PGALLOC_H
+
+#include <linux/threads.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <asm/fixmap.h>
+#include <hv/hypervisor.h>
+
+/* Bits for the size of the second-level page table. */
+#define L2_KERNEL_PGTABLE_SHIFT \
+  (HV_LOG2_PAGE_SIZE_LARGE - HV_LOG2_PAGE_SIZE_SMALL + HV_LOG2_PTE_SIZE)
+
+/* We currently allocate user L2 page tables by page (unlike kernel L2s). */
+#if L2_KERNEL_PGTABLE_SHIFT < HV_LOG2_PAGE_SIZE_SMALL
+#define L2_USER_PGTABLE_SHIFT HV_LOG2_PAGE_SIZE_SMALL
+#else
+#define L2_USER_PGTABLE_SHIFT L2_KERNEL_PGTABLE_SHIFT
+#endif
+
+/* How many pages do we need, as an "order", for a user L2 page table? */
+#define L2_USER_PGTABLE_ORDER (L2_USER_PGTABLE_SHIFT - HV_LOG2_PAGE_SIZE_SMALL)
+
+/* How big is a kernel L2 page table? */
+#define L2_KERNEL_PGTABLE_SIZE (1 << L2_KERNEL_PGTABLE_SHIFT)
+
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
+{
+#ifdef CONFIG_64BIT
+        set_pte_order(pmdp, pmd, L2_USER_PGTABLE_ORDER);
+#else
+        set_pte_order(&pmdp->pud.pgd, pmd.pud.pgd, L2_USER_PGTABLE_ORDER);
+#endif
+}
+
+static inline void pmd_populate_kernel(struct mm_struct *mm,
+                                       pmd_t *pmd, pte_t *ptep)
+{
+        set_pmd(pmd, ptfn_pmd(__pa(ptep) >> HV_LOG2_PAGE_TABLE_ALIGN,
+                              __pgprot(_PAGE_PRESENT)));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+                                pgtable_t page)
+{
+        set_pmd(pmd, ptfn_pmd(HV_PFN_TO_PTFN(page_to_pfn(page)),
+                              __pgprot(_PAGE_PRESENT)));
+}
+
+/*
+ * Allocate and free page tables.
+ */
+
+extern pgd_t *pgd_alloc(struct mm_struct *mm);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
+extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address);
+extern void pte_free(struct mm_struct *mm, struct page *pte);
+
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline pte_t *
+pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+        return pfn_to_kaddr(page_to_pfn(pte_alloc_one(mm, address)));
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+        BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
+        pte_free(mm, virt_to_page(pte));
+}
+
+extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
+                           unsigned long address);
+
+#define check_pgt_cache()       do { } while (0)
+
+/*
+ * Get the small-page pte_t lowmem entry for a given pfn.
+ * This may or may not be in use, depending on whether the initial
+ * huge-page entry for the page has already been shattered.
+ */
+pte_t *get_prealloc_pte(unsigned long pfn);
+
+/* During init, we can shatter kernel huge pages if needed. */
+void shatter_pmd(pmd_t *pmd);
+
+#ifdef __tilegx__
+/* We share a single page allocator for both L1 and L2 page tables. */
+#if HV_L1_SIZE != HV_L2_SIZE
+# error Rework assumption that L1 and L2 page tables are same size.
+#endif
+#define L1_USER_PGTABLE_ORDER L2_USER_PGTABLE_ORDER
+#define pud_populate(mm, pud, pmd) \
+  pmd_populate_kernel((mm), (pmd_t *)(pud), (pte_t *)(pmd))
+#define pmd_alloc_one(mm, addr) \
+  ((pmd_t *)page_to_virt(pte_alloc_one((mm), (addr))))
+#define pmd_free(mm, pmdp) \
+  pte_free((mm), virt_to_page(pmdp))
+#define __pmd_free_tlb(tlb, pmdp, address) \
+  __pte_free_tlb((tlb), virt_to_page(pmdp), (address))
+#endif
+
+#endif /* _ASM_TILE_PGALLOC_H */
diff --git a/arch/tile/include/asm/pgtable.h b/arch/tile/include/asm/pgtable.h
new file mode 100644
index 000000000000..b3367379d537
--- /dev/null
+++ b/arch/tile/include/asm/pgtable.h
@@ -0,0 +1,480 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This file contains the functions and defines necessary to modify and use
+ * the TILE page table tree.
+ */
+
+#ifndef _ASM_TILE_PGTABLE_H
+#define _ASM_TILE_PGTABLE_H
+
+#include <hv/hypervisor.h>
+
+#ifndef __ASSEMBLY__
+
+#include <linux/bitops.h>
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <asm/processor.h>
+#include <asm/fixmap.h>
+#include <asm/system.h>
+
+struct mm_struct;
+struct vm_area_struct;
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+extern pgd_t swapper_pg_dir[];
+extern pgprot_t swapper_pgprot;
+extern struct kmem_cache *pgd_cache;
+extern spinlock_t pgd_lock;
+extern struct list_head pgd_list;
+
+/*
+ * The very last slots in the pgd_t are for addresses unusable by Linux
+ * (pgd_addr_invalid() returns true).  So we use them for the list structure.
+ * The x86 code we are modelled on uses the page->private/index fields
+ * (older 2.6 kernels) or the lru list (newer 2.6 kernels), but since
+ * our pgds are so much smaller than a page, it seems a waste to
+ * spend a whole page on each pgd.
+ */
+#define PGD_LIST_OFFSET \
+  ((PTRS_PER_PGD * sizeof(pgd_t)) - sizeof(struct list_head))
+#define pgd_to_list(pgd) \
+  ((struct list_head *)((char *)(pgd) + PGD_LIST_OFFSET))
+#define list_to_pgd(list) \
+  ((pgd_t *)((char *)(list) - PGD_LIST_OFFSET))
+
+extern void pgtable_cache_init(void);
+extern void paging_init(void);
+extern void set_page_homes(void);
+
+#define FIRST_USER_ADDRESS      0
+
+#define _PAGE_PRESENT           HV_PTE_PRESENT
+#define _PAGE_HUGE_PAGE         HV_PTE_PAGE
+#define _PAGE_READABLE          HV_PTE_READABLE
+#define _PAGE_WRITABLE          HV_PTE_WRITABLE
+#define _PAGE_EXECUTABLE        HV_PTE_EXECUTABLE
+#define _PAGE_ACCESSED          HV_PTE_ACCESSED
+#define _PAGE_DIRTY             HV_PTE_DIRTY
+#define _PAGE_GLOBAL            HV_PTE_GLOBAL
+#define _PAGE_USER              HV_PTE_USER
+
+/*
+ * All the "standard" bits.  Cache-control bits are managed elsewhere.
+ * This is used to test for valid level-2 page table pointers by checking
+ * all the bits, and to mask away the cache control bits for mprotect.
+ */
+#define _PAGE_ALL (\
+  _PAGE_PRESENT | \
+  _PAGE_HUGE_PAGE | \
+  _PAGE_READABLE | \
+  _PAGE_WRITABLE | \
+  _PAGE_EXECUTABLE | \
+  _PAGE_ACCESSED | \
+  _PAGE_DIRTY | \
+  _PAGE_GLOBAL | \
+  _PAGE_USER \
+)
+
+#define PAGE_NONE \
+        __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)
+#define PAGE_SHARED \
+        __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
+                 _PAGE_USER | _PAGE_ACCESSED)
+
+#define PAGE_SHARED_EXEC \
+        __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
+                 _PAGE_EXECUTABLE | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_COPY_NOEXEC \
+        __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
+#define PAGE_COPY_EXEC \
+        __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
+                 _PAGE_READABLE | _PAGE_EXECUTABLE)
+#define PAGE_COPY \
+        PAGE_COPY_NOEXEC
+#define PAGE_READONLY \
+        __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
+#define PAGE_READONLY_EXEC \
+        __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
+                 _PAGE_READABLE | _PAGE_EXECUTABLE)
+
+#define _PAGE_KERNEL_RO \
+ (_PAGE_PRESENT | _PAGE_GLOBAL | _PAGE_READABLE | _PAGE_ACCESSED)
+#define _PAGE_KERNEL \
+ (_PAGE_KERNEL_RO | _PAGE_WRITABLE | _PAGE_DIRTY)
+#define _PAGE_KERNEL_EXEC       (_PAGE_KERNEL_RO | _PAGE_EXECUTABLE)
+
+#define PAGE_KERNEL             __pgprot(_PAGE_KERNEL)
+#define PAGE_KERNEL_RO          __pgprot(_PAGE_KERNEL_RO)
+#define PAGE_KERNEL_EXEC        __pgprot(_PAGE_KERNEL_EXEC)
+
+#define page_to_kpgprot(p) PAGE_KERNEL
+
+/*
+ * We could tighten these up, but for now writable or executable
+ * implies readable.
+ */
+#define __P000  PAGE_NONE
+#define __P001  PAGE_READONLY
+#define __P010  PAGE_COPY      /* this is write-only, which we won't support */
+#define __P011  PAGE_COPY
+#define __P100  PAGE_READONLY_EXEC
+#define __P101  PAGE_READONLY_EXEC
+#define __P110  PAGE_COPY_EXEC
+#define __P111  PAGE_COPY_EXEC
+
+#define __S000  PAGE_NONE
+#define __S001  PAGE_READONLY
+#define __S010  PAGE_SHARED
+#define __S011  PAGE_SHARED
+#define __S100  PAGE_READONLY_EXEC
+#define __S101  PAGE_READONLY_EXEC
+#define __S110  PAGE_SHARED_EXEC
+#define __S111  PAGE_SHARED_EXEC
+
+/*
+ * All the normal _PAGE_ALL bits are ignored for PMDs, except PAGE_PRESENT
+ * and PAGE_HUGE_PAGE, which must be one and zero, respectively.
+ * We set the ignored bits to zero.
+ */
+#define _PAGE_TABLE     _PAGE_PRESENT
+
+/* Inherit the caching flags from the old protection bits. */
+#define pgprot_modify(oldprot, newprot) \
+  (pgprot_t) { ((oldprot).val & ~_PAGE_ALL) | (newprot).val }
+
+/* Just setting the PFN to zero suffices. */
+#define pte_pgprot(x) hv_pte_set_pfn((x), 0)
+
+/*
+ * For PTEs and PDEs, we must clear the Present bit first when
+ * clearing a page table entry, so clear the bottom half first and
+ * enforce ordering with a barrier.
+ */
+static inline void __pte_clear(pte_t *ptep)
+{
+#ifdef __tilegx__
+        ptep->val = 0;
+#else
+        u32 *tmp = (u32 *)ptep;
+        tmp[0] = 0;
+        barrier();
+        tmp[1] = 0;
+#endif
+}
+#define pte_clear(mm, addr, ptep) __pte_clear(ptep)
+
+/*
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+#define pte_present hv_pte_get_present
+#define pte_user hv_pte_get_user
+#define pte_read hv_pte_get_readable
+#define pte_dirty hv_pte_get_dirty
+#define pte_young hv_pte_get_accessed
+#define pte_write hv_pte_get_writable
+#define pte_exec hv_pte_get_executable
+#define pte_huge hv_pte_get_page
+#define pte_rdprotect hv_pte_clear_readable
+#define pte_exprotect hv_pte_clear_executable
+#define pte_mkclean hv_pte_clear_dirty
+#define pte_mkold hv_pte_clear_accessed
+#define pte_wrprotect hv_pte_clear_writable
+#define pte_mksmall hv_pte_clear_page
+#define pte_mkread hv_pte_set_readable
+#define pte_mkexec hv_pte_set_executable
+#define pte_mkdirty hv_pte_set_dirty
+#define pte_mkyoung hv_pte_set_accessed
+#define pte_mkwrite hv_pte_set_writable
+#define pte_mkhuge hv_pte_set_page
+
+#define pte_special(pte) 0
+#define pte_mkspecial(pte) (pte)
+
+/*
+ * Use some spare bits in the PTE for user-caching tags.
+ */
+#define pte_set_forcecache hv_pte_set_client0
+#define pte_get_forcecache hv_pte_get_client0
+#define pte_clear_forcecache hv_pte_clear_client0
+#define pte_set_anyhome hv_pte_set_client1
+#define pte_get_anyhome hv_pte_get_client1
+#define pte_clear_anyhome hv_pte_clear_client1
+
+/*
+ * A migrating PTE has PAGE_PRESENT clear but all the other bits preserved.
+ */
+#define pte_migrating hv_pte_get_migrating
+#define pte_mkmigrate(x) hv_pte_set_migrating(hv_pte_clear_present(x))
+#define pte_donemigrate(x) hv_pte_set_present(hv_pte_clear_migrating(x))
+
+#define pte_ERROR(e) \
+        pr_err("%s:%d: bad pte 0x%016llx.\n", __FILE__, __LINE__, pte_val(e))
+#define pgd_ERROR(e) \
+        pr_err("%s:%d: bad pgd 0x%016llx.\n", __FILE__, __LINE__, pgd_val(e))
+
+/*
+ * set_pte_order() sets the given PTE and also sanity-checks the
+ * requested PTE against the page homecaching.  Unspecified parts
+ * of the PTE are filled in when it is written to memory, i.e. all
+ * caching attributes if "!forcecache", or the home cpu if "anyhome".
+ */
+extern void set_pte_order(pte_t *ptep, pte_t pte, int order);
+
+#define set_pte(ptep, pteval) set_pte_order(ptep, pteval, 0)
+#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
+#define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval)
+
+#define pte_page(x)             pfn_to_page(pte_pfn(x))
+
+static inline int pte_none(pte_t pte)
+{
+        return !pte.val;
+}
+
+static inline unsigned long pte_pfn(pte_t pte)
+{
+        return hv_pte_get_pfn(pte);
+}
+
+/* Set or get the remote cache cpu in a pgprot with remote caching. */
+extern pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu);
+extern int get_remote_cache_cpu(pgprot_t prot);
+
+static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
+{
+        return hv_pte_set_pfn(prot, pfn);
+}
+
+/* Support for priority mappings. */
+extern void start_mm_caching(struct mm_struct *mm);
+extern void check_mm_caching(struct mm_struct *prev, struct mm_struct *next);
+
+/*
+ * Support non-linear file mappings (see sys_remap_file_pages).
+ * This is defined by CLIENT1 set but CLIENT0 and _PAGE_PRESENT clear, and the
+ * file offset in the 32 high bits.
+ */
+#define _PAGE_FILE        HV_PTE_CLIENT1
+#define PTE_FILE_MAX_BITS 32
+#define pte_file(pte)     (hv_pte_get_client1(pte) && !hv_pte_get_client0(pte))
+#define pte_to_pgoff(pte) ((pte).val >> 32)
+#define pgoff_to_pte(off) ((pte_t) { (((long long)(off)) << 32) | _PAGE_FILE })
+
+/*
+ * Encode and de-code a swap entry (see <linux/swapops.h>).
+ * We put the swap file type+offset in the 32 high bits;
+ * I believe we can just leave the low bits clear.
+ */
+#define __swp_type(swp)         ((swp).val & 0x1f)
+#define __swp_offset(swp)       ((swp).val >> 5)
+#define __swp_entry(type, off)  ((swp_entry_t) { (type) | ((off) << 5) })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).val >> 32 })
+#define __swp_entry_to_pte(swp) ((pte_t) { (((long long) ((swp).val)) << 32) })
+
+/*
+ * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
+ *
+ *  dst - pointer to pgd range anwhere on a pgd page
+ *  src - ""
+ *  count - the number of pgds to copy.
+ *
+ * dst and src can be on the same page, but the range must not overlap,
+ * and must not cross a page boundary.
+ */
+static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
+{
+       memcpy(dst, src, count * sizeof(pgd_t));
+}
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+
+#define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
+
+/*
+ * If we are doing an mprotect(), just accept the new vma->vm_page_prot
+ * value and combine it with the PFN from the old PTE to get a new PTE.
+ */
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+        return pfn_pte(hv_pte_get_pfn(pte), newprot);
+}
+
+/*
+ * The pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+ *
+ * This macro returns the index of the entry in the pgd page which would
+ * control the given virtual address.
+ */
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+
+/*
+ * pgd_offset() returns a (pgd_t *)
+ * pgd_index() is used get the offset into the pgd page's array of pgd_t's.
+ */
+#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
+
+/*
+ * A shortcut which implies the use of the kernel's pgd, instead
+ * of a process's.
+ */
+#define pgd_offset_k(address) pgd_offset(&init_mm, address)
+
+#if defined(CONFIG_HIGHPTE)
+extern pte_t *_pte_offset_map(pmd_t *, unsigned long address, enum km_type);
+#define pte_offset_map(dir, address) \
+        _pte_offset_map(dir, address, KM_PTE0)
+#define pte_offset_map_nested(dir, address) \
+        _pte_offset_map(dir, address, KM_PTE1)
+#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
+#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
+#else
+#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
+#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
+#define pte_unmap(pte) do { } while (0)
+#define pte_unmap_nested(pte) do { } while (0)
+#endif
+
+/* Clear a non-executable kernel PTE and flush it from the TLB. */
+#define kpte_clear_flush(ptep, vaddr)           \
+do {                                            \
+        pte_clear(&init_mm, (vaddr), (ptep));   \
+        local_flush_tlb_page(FLUSH_NONEXEC, (vaddr), PAGE_SIZE); \
+} while (0)
+
+/*
+ * The kernel page tables contain what we need, and we flush when we
+ * change specific page table entries.
+ */
+#define update_mmu_cache(vma, address, pte) do { } while (0)
+
+#ifdef CONFIG_FLATMEM
+#define kern_addr_valid(addr)   (1)
+#endif /* CONFIG_FLATMEM */
+
+#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)         \
+                remap_pfn_range(vma, vaddr, pfn, size, prot)
+
+extern void vmalloc_sync_all(void);
+
+#endif /* !__ASSEMBLY__ */
+
+#ifdef __tilegx__
+#include <asm/pgtable_64.h>
+#else
+#include <asm/pgtable_32.h>
+#endif
+
+#ifndef __ASSEMBLY__
+
+static inline int pmd_none(pmd_t pmd)
+{
+        /*
+         * Only check low word on 32-bit platforms, since it might be
+         * out of sync with upper half.
+         */
+        return (unsigned long)pmd_val(pmd) == 0;
+}
+
+static inline int pmd_present(pmd_t pmd)
+{
+        return pmd_val(pmd) & _PAGE_PRESENT;
+}
+
+static inline int pmd_bad(pmd_t pmd)
+{
+        return ((pmd_val(pmd) & _PAGE_ALL) != _PAGE_TABLE);
+}
+
+static inline unsigned long pages_to_mb(unsigned long npg)
+{
+        return npg >> (20 - PAGE_SHIFT);
+}
+
+/*
+ * The pmd can be thought of an array like this: pmd_t[PTRS_PER_PMD]
+ *
+ * This function returns the index of the entry in the pmd which would
+ * control the given virtual address.
+ */
+static inline unsigned long pmd_index(unsigned long address)
+{
+        return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
+}
+
+/*
+ * A given kernel pmd_t maps to a specific virtual address (either a
+ * kernel huge page or a kernel pte_t table).  Since kernel pte_t
+ * tables can be aligned at sub-page granularity, this function can
+ * return non-page-aligned pointers, despite its name.
+ */
+static inline unsigned long pmd_page_vaddr(pmd_t pmd)
+{
+        phys_addr_t pa =
+                (phys_addr_t)pmd_ptfn(pmd) << HV_LOG2_PAGE_TABLE_ALIGN;
+        return (unsigned long)__va(pa);
+}
+
+/*
+ * A pmd_t points to the base of a huge page or to a pte_t array.
+ * If a pte_t array, since we can have multiple per page, we don't
+ * have a one-to-one mapping of pmd_t's to pages.  However, this is
+ * OK for pte_lockptr(), since we just end up with potentially one
+ * lock being used for several pte_t arrays.
+ */
+#define pmd_page(pmd) pfn_to_page(HV_PTFN_TO_PFN(pmd_ptfn(pmd)))
+
+/*
+ * The pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
+ *
+ * This macro returns the index of the entry in the pte page which would
+ * control the given virtual address.
+ */
+static inline unsigned long pte_index(unsigned long address)
+{
+        return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
+}
+
+static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
+{
+       return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
+}
+
+static inline int pmd_huge_page(pmd_t pmd)
+{
+        return pmd_val(pmd) & _PAGE_HUGE_PAGE;
+}
+
+#include <asm-generic/pgtable.h>
+
+/* Support /proc/NN/pgtable API. */
+struct seq_file;
+int arch_proc_pgtable_show(struct seq_file *m, struct mm_struct *mm,
+                           unsigned long vaddr, pte_t *ptep, void **datap);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_PGTABLE_H */
diff --git a/arch/tile/include/asm/pgtable_32.h b/arch/tile/include/asm/pgtable_32.h
new file mode 100644
index 000000000000..53ec34884744
--- /dev/null
+++ b/arch/tile/include/asm/pgtable_32.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ */
+
+#ifndef _ASM_TILE_PGTABLE_32_H
+#define _ASM_TILE_PGTABLE_32_H
+
+/*
+ * The level-1 index is defined by the huge page size.  A PGD is composed
+ * of PTRS_PER_PGD pgd_t's and is the top level of the page table.
+ */
+#define PGDIR_SHIFT     HV_LOG2_PAGE_SIZE_LARGE
+#define PGDIR_SIZE      HV_PAGE_SIZE_LARGE
+#define PGDIR_MASK      (~(PGDIR_SIZE-1))
+#define PTRS_PER_PGD    (1 << (32 - PGDIR_SHIFT))
+
+/*
+ * The level-2 index is defined by the difference between the huge
+ * page size and the normal page size.  A PTE is composed of
+ * PTRS_PER_PTE pte_t's and is the bottom level of the page table.
+ * Note that the hypervisor docs use PTE for what we call pte_t, so
+ * this nomenclature is somewhat confusing.
+ */
+#define PTRS_PER_PTE (1 << (HV_LOG2_PAGE_SIZE_LARGE - HV_LOG2_PAGE_SIZE_SMALL))
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Right now we initialize only a single pte table. It can be extended
+ * easily, subsequent pte tables have to be allocated in one physical
+ * chunk of RAM.
+ *
+ * HOWEVER, if we are using an allocation scheme with slop after the
+ * end of the page table (e.g. where our L2 page tables are 2KB but
+ * our pages are 64KB and we are allocating via the page allocator)
+ * we can't extend it easily.
+ */
+#define LAST_PKMAP PTRS_PER_PTE
+
+#define PKMAP_BASE   ((FIXADDR_BOOT_START - PAGE_SIZE*LAST_PKMAP) & PGDIR_MASK)
+
+#ifdef CONFIG_HIGHMEM
+# define __VMAPPING_END (PKMAP_BASE & ~(HPAGE_SIZE-1))
+#else
+# define __VMAPPING_END (FIXADDR_START & ~(HPAGE_SIZE-1))
+#endif
+
+#ifdef CONFIG_HUGEVMAP
+#define HUGE_VMAP_END   __VMAPPING_END
+#define HUGE_VMAP_BASE  (HUGE_VMAP_END - CONFIG_NR_HUGE_VMAPS * HPAGE_SIZE)
+#define _VMALLOC_END    HUGE_VMAP_BASE
+#else
+#define _VMALLOC_END    __VMAPPING_END
+#endif
+
+/*
+ * Align the vmalloc area to an L2 page table, and leave a guard page
+ * at the beginning and end.  The vmalloc code also puts in an internal
+ * guard page between each allocation.
+ */
+#define VMALLOC_END     (_VMALLOC_END - PAGE_SIZE)
+extern unsigned long VMALLOC_RESERVE /* = CONFIG_VMALLOC_RESERVE */;
+#define _VMALLOC_START  (_VMALLOC_END - VMALLOC_RESERVE)
+#define VMALLOC_START   (_VMALLOC_START + PAGE_SIZE)
+
+/* This is the maximum possible amount of lowmem. */
+#define MAXMEM          (_VMALLOC_START - PAGE_OFFSET)
+
+/* We have no pmd or pud since we are strictly a two-level page table */
+#include <asm-generic/pgtable-nopmd.h>
+
+/* We don't define any pgds for these addresses. */
+static inline int pgd_addr_invalid(unsigned long addr)
+{
+        return addr >= MEM_HV_INTRPT;
+}
+
+/*
+ * Provide versions of these routines that can be used safely when
+ * the hypervisor may be asynchronously modifying dirty/accessed bits.
+ * ptep_get_and_clear() matches the generic one but we provide it to
+ * be parallel with the 64-bit code.
+ */
+#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+
+extern int ptep_test_and_clear_young(struct vm_area_struct *,
+                                     unsigned long addr, pte_t *);
+extern void ptep_set_wrprotect(struct mm_struct *,
+                               unsigned long addr, pte_t *);
+
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
+                                       unsigned long addr, pte_t *ptep)
+{
+        pte_t pte = *ptep;
+        pte_clear(_mm, addr, ptep);
+        return pte;
+}
+
+/* Create a pmd from a PTFN. */
+static inline pmd_t ptfn_pmd(unsigned long ptfn, pgprot_t prot)
+{
+        return (pmd_t){ { hv_pte_set_ptfn(prot, ptfn) } };
+}
+
+/* Return the page-table frame number (ptfn) that a pmd_t points at. */
+#define pmd_ptfn(pmd) hv_pte_get_ptfn((pmd).pud.pgd)
+
+static inline void pmd_clear(pmd_t *pmdp)
+{
+        __pte_clear(&pmdp->pud.pgd);
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_TILE_PGTABLE_32_H */
diff --git a/arch/tile/include/asm/poll.h b/arch/tile/include/asm/poll.h
new file mode 100644
index 000000000000..c98509d3149e
--- /dev/null
+++ b/arch/tile/include/asm/poll.h
@@ -0,0 +1 @@
+#include <asm-generic/poll.h>
diff --git a/arch/tile/include/asm/posix_types.h b/arch/tile/include/asm/posix_types.h
new file mode 100644
index 000000000000..22cae6230ceb
--- /dev/null
+++ b/arch/tile/include/asm/posix_types.h
@@ -0,0 +1 @@
+#include <asm-generic/posix_types.h>
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
new file mode 100644
index 000000000000..d942d09b252e
--- /dev/null
+++ b/arch/tile/include/asm/processor.h
@@ -0,0 +1,338 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PROCESSOR_H
+#define _ASM_TILE_PROCESSOR_H
+
+#ifndef __ASSEMBLY__
+
+/*
+ * NOTE: we don't include <linux/ptrace.h> or <linux/percpu.h> as one
+ * normally would, due to #include dependencies.
+ */
+#include <linux/types.h>
+#include <asm/ptrace.h>
+#include <asm/percpu.h>
+
+#include <arch/chip.h>
+#include <arch/spr_def.h>
+
+struct task_struct;
+struct thread_struct;
+
+typedef struct {
+        unsigned long seg;
+} mm_segment_t;
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+void *current_text_addr(void);
+
+#if CHIP_HAS_TILE_DMA()
+/* Capture the state of a suspended DMA. */
+struct tile_dma_state {
+        int enabled;
+        unsigned long src;
+        unsigned long dest;
+        unsigned long strides;
+        unsigned long chunk_size;
+        unsigned long src_chunk;
+        unsigned long dest_chunk;
+        unsigned long byte;
+        unsigned long status;
+};
+
+/*
+ * A mask of the DMA status register for selecting only the 'running'
+ * and 'done' bits.
+ */
+#define DMA_STATUS_MASK \
+  (SPR_DMA_STATUS__RUNNING_MASK | SPR_DMA_STATUS__DONE_MASK)
+#endif
+
+/*
+ * Track asynchronous TLB events (faults and access violations)
+ * that occur while we are in kernel mode from DMA or the SN processor.
+ */
+struct async_tlb {
+        short fault_num;         /* original fault number; 0 if none */
+        char is_fault;           /* was it a fault (vs an access violation) */
+        char is_write;           /* for fault: was it caused by a write? */
+        unsigned long address;   /* what address faulted? */
+};
+
+#ifdef CONFIG_HARDWALL
+struct hardwall_info;
+#endif
+
+struct thread_struct {
+        /* kernel stack pointer */
+        unsigned long  ksp;
+        /* kernel PC */
+        unsigned long  pc;
+        /* starting user stack pointer (for page migration) */
+        unsigned long  usp0;
+        /* pid of process that created this one */
+        pid_t creator_pid;
+#if CHIP_HAS_TILE_DMA()
+        /* DMA info for suspended threads (byte == 0 means no DMA state) */
+        struct tile_dma_state tile_dma_state;
+#endif
+        /* User EX_CONTEXT registers */
+        unsigned long ex_context[2];
+        /* User SYSTEM_SAVE registers */
+        unsigned long system_save[4];
+        /* User interrupt mask */
+        unsigned long long interrupt_mask;
+        /* User interrupt-control 0 state */
+        unsigned long intctrl_0;
+#if CHIP_HAS_PROC_STATUS_SPR()
+        /* Any other miscellaneous processor state bits */
+        unsigned long proc_status;
+#endif
+#ifdef CONFIG_HARDWALL
+        /* Is this task tied to an activated hardwall? */
+        struct hardwall_info *hardwall;
+        /* Chains this task into the list at hardwall->list. */
+        struct list_head hardwall_list;
+#endif
+#if CHIP_HAS_TILE_DMA()
+        /* Async DMA TLB fault information */
+        struct async_tlb dma_async_tlb;
+#endif
+#if CHIP_HAS_SN_PROC()
+        /* Was static network processor when we were switched out? */
+        int sn_proc_running;
+        /* Async SNI TLB fault information */
+        struct async_tlb sn_async_tlb;
+#endif
+};
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Start with "sp" this many bytes below the top of the kernel stack.
+ * This preserves the invariant that a called function may write to *sp.
+ */
+#define STACK_TOP_DELTA 8
+
+/*
+ * When entering the kernel via a fault, start with the top of the
+ * pt_regs structure this many bytes below the top of the page.
+ * This aligns the pt_regs structure optimally for cache-line access.
+ */
+#ifdef __tilegx__
+#define KSTK_PTREGS_GAP  48
+#else
+#define KSTK_PTREGS_GAP  56
+#endif
+
+#ifndef __ASSEMBLY__
+
+#ifdef __tilegx__
+#define TASK_SIZE_MAX           (MEM_LOW_END + 1)
+#else
+#define TASK_SIZE_MAX           PAGE_OFFSET
+#endif
+
+/* TASK_SIZE and related variables are always checked in "current" context. */
+#ifdef CONFIG_COMPAT
+#define COMPAT_TASK_SIZE        (1UL << 31)
+#define TASK_SIZE               ((current_thread_info()->status & TS_COMPAT) ?\
+                                 COMPAT_TASK_SIZE : TASK_SIZE_MAX)
+#else
+#define TASK_SIZE               TASK_SIZE_MAX
+#endif
+
+/* We provide a minimal "vdso" a la x86; just the sigreturn code for now. */
+#define VDSO_BASE               (TASK_SIZE - PAGE_SIZE)
+
+#define STACK_TOP               VDSO_BASE
+
+/* STACK_TOP_MAX is used temporarily in execve and should not check COMPAT. */
+#define STACK_TOP_MAX           TASK_SIZE_MAX
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's, if it is using bottom-up mapping.
+ */
+#define TASK_UNMAPPED_BASE      (PAGE_ALIGN(TASK_SIZE / 3))
+
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
+#define INIT_THREAD {                                                   \
+        .ksp = (unsigned long)init_stack + THREAD_SIZE - STACK_TOP_DELTA, \
+        .interrupt_mask = -1ULL                                         \
+}
+
+/* Kernel stack top for the task that first boots on this cpu. */
+DECLARE_PER_CPU(unsigned long, boot_sp);
+
+/* PC to boot from on this cpu. */
+DECLARE_PER_CPU(unsigned long, boot_pc);
+
+/* Do necessary setup to start up a newly executed thread. */
+static inline void start_thread(struct pt_regs *regs,
+                                unsigned long pc, unsigned long usp)
+{
+        regs->pc = pc;
+        regs->sp = usp;
+}
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+        /* Nothing for now */
+}
+
+/* Prepare to copy thread state - unlazy all lazy status. */
+#define prepare_to_copy(tsk)    do { } while (0)
+
+extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
+
+
+/*
+ * Return saved (kernel) PC of a blocked thread.
+ * Only used in a printk() in kernel/sched.c, so don't work too hard.
+ */
+#define thread_saved_pc(t)   ((t)->thread.pc)
+
+unsigned long get_wchan(struct task_struct *p);
+
+/* Return initial ksp value for given task. */
+#define task_ksp0(task) ((unsigned long)(task)->stack + THREAD_SIZE)
+
+/* Return some info about the user process TASK. */
+#define KSTK_TOP(task)  (task_ksp0(task) - STACK_TOP_DELTA)
+#define task_pt_regs(task) \
+  ((struct pt_regs *)(task_ksp0(task) - KSTK_PTREGS_GAP) - 1)
+#define task_sp(task)   (task_pt_regs(task)->sp)
+#define task_pc(task)   (task_pt_regs(task)->pc)
+/* Aliases for pc and sp (used in fs/proc/array.c) */
+#define KSTK_EIP(task)  task_pc(task)
+#define KSTK_ESP(task)  task_sp(task)
+
+/* Standard format for printing registers and other word-size data. */
+#ifdef __tilegx__
+# define REGFMT "0x%016lx"
+#else
+# define REGFMT "0x%08lx"
+#endif
+
+/*
+ * Do some slow action (e.g. read a slow SPR).
+ * Note that this must also have compiler-barrier semantics since
+ * it may be used in a busy loop reading memory.
+ */
+static inline void cpu_relax(void)
+{
+        __insn_mfspr(SPR_PASS);
+        barrier();
+}
+
+struct siginfo;
+extern void arch_coredump_signal(struct siginfo *, struct pt_regs *);
+#define arch_coredump_signal arch_coredump_signal
+
+/* Info on this processor (see fs/proc/cpuinfo.c) */
+struct seq_operations;
+extern const struct seq_operations cpuinfo_op;
+
+/* Provide information about the chip model. */
+extern char chip_model[64];
+
+/* Data on which physical memory controller corresponds to which NUMA node. */
+extern int node_controller[];
+
+
+/* Do we dump information to the console when a user application crashes? */
+extern int show_crashinfo;
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+/* Does the heap allocator return hash-for-home pages by default? */
+extern int hash_default;
+
+/* Should kernel stack pages be hash-for-home? */
+extern int kstack_hash;
+
+/* Does MAP_ANONYMOUS return hash-for-home pages by default? */
+#define uheap_hash hash_default
+
+#else
+#define hash_default 0
+#define kstack_hash 0
+#define uheap_hash 0
+#endif
+
+/* Are we using huge pages in the TLB for kernel data? */
+extern int kdata_huge;
+
+#define PREFETCH_STRIDE CHIP_L2_LINE_SIZE()
+
+#else /* __ASSEMBLY__ */
+
+/* Do some slow action (e.g. read a slow SPR). */
+#define CPU_RELAX       mfspr zero, SPR_PASS
+
+#endif /* !__ASSEMBLY__ */
+
+/* Assembly code assumes that the PL is in the low bits. */
+#if SPR_EX_CONTEXT_1_1__PL_SHIFT != 0
+# error Fix assembly assumptions about PL
+#endif
+
+/* We sometimes use these macros for EX_CONTEXT_0_1 as well. */
+#if SPR_EX_CONTEXT_1_1__PL_SHIFT != SPR_EX_CONTEXT_0_1__PL_SHIFT || \
+    SPR_EX_CONTEXT_1_1__PL_RMASK != SPR_EX_CONTEXT_0_1__PL_RMASK || \
+    SPR_EX_CONTEXT_1_1__ICS_SHIFT != SPR_EX_CONTEXT_0_1__ICS_SHIFT || \
+    SPR_EX_CONTEXT_1_1__ICS_RMASK != SPR_EX_CONTEXT_0_1__ICS_RMASK
+# error Fix assumptions that EX1 macros work for both PL0 and PL1
+#endif
+
+/* Allow pulling apart and recombining the PL and ICS bits in EX_CONTEXT. */
+#define EX1_PL(ex1) \
+  (((ex1) >> SPR_EX_CONTEXT_1_1__PL_SHIFT) & SPR_EX_CONTEXT_1_1__PL_RMASK)
+#define EX1_ICS(ex1) \
+  (((ex1) >> SPR_EX_CONTEXT_1_1__ICS_SHIFT) & SPR_EX_CONTEXT_1_1__ICS_RMASK)
+#define PL_ICS_EX1(pl, ics) \
+  (((pl) << SPR_EX_CONTEXT_1_1__PL_SHIFT) | \
+   ((ics) << SPR_EX_CONTEXT_1_1__ICS_SHIFT))
+
+/*
+ * Provide symbolic constants for PLs.
+ * Note that assembly code assumes that USER_PL is zero.
+ */
+#define USER_PL 0
+#define KERNEL_PL 1
+
+/* SYSTEM_SAVE_1_0 holds the current cpu number ORed with ksp0. */
+#define CPU_LOG_MASK_VALUE 12
+#define CPU_MASK_VALUE ((1 << CPU_LOG_MASK_VALUE) - 1)
+#if CONFIG_NR_CPUS > CPU_MASK_VALUE
+# error Too many cpus!
+#endif
+#define raw_smp_processor_id() \
+        ((int)__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & CPU_MASK_VALUE)
+#define get_current_ksp0() \
+        (__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & ~CPU_MASK_VALUE)
+#define next_current_ksp0(task) ({ \
+        unsigned long __ksp0 = task_ksp0(task); \
+        int __cpu = raw_smp_processor_id(); \
+        BUG_ON(__ksp0 & CPU_MASK_VALUE); \
+        __ksp0 | __cpu; \
+})
+
+#endif /* _ASM_TILE_PROCESSOR_H */
diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h
new file mode 100644
index 000000000000..acdae814e016
--- /dev/null
+++ b/arch/tile/include/asm/ptrace.h
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_PTRACE_H
+#define _ASM_TILE_PTRACE_H
+
+#include <arch/chip.h>
+#include <arch/abi.h>
+
+/* These must match struct pt_regs, below. */
+#if CHIP_WORD_SIZE() == 32
+#define PTREGS_OFFSET_REG(n)    ((n)*4)
+#else
+#define PTREGS_OFFSET_REG(n)    ((n)*8)
+#endif
+#define PTREGS_OFFSET_BASE      0
+#define PTREGS_OFFSET_TP        PTREGS_OFFSET_REG(53)
+#define PTREGS_OFFSET_SP        PTREGS_OFFSET_REG(54)
+#define PTREGS_OFFSET_LR        PTREGS_OFFSET_REG(55)
+#define PTREGS_NR_GPRS          56
+#define PTREGS_OFFSET_PC        PTREGS_OFFSET_REG(56)
+#define PTREGS_OFFSET_EX1       PTREGS_OFFSET_REG(57)
+#define PTREGS_OFFSET_FAULTNUM  PTREGS_OFFSET_REG(58)
+#define PTREGS_OFFSET_ORIG_R0   PTREGS_OFFSET_REG(59)
+#define PTREGS_OFFSET_FLAGS     PTREGS_OFFSET_REG(60)
+#if CHIP_HAS_CMPEXCH()
+#define PTREGS_OFFSET_CMPEXCH   PTREGS_OFFSET_REG(61)
+#endif
+#define PTREGS_SIZE             PTREGS_OFFSET_REG(64)
+
+#ifndef __ASSEMBLY__
+
+#ifdef __KERNEL__
+/* Benefit from consistent use of "long" on all chips. */
+typedef unsigned long pt_reg_t;
+#else
+/* Provide appropriate length type to userspace regardless of -m32/-m64. */
+typedef uint_reg_t pt_reg_t;
+#endif
+
+/*
+ * This struct defines the way the registers are stored on the stack during a
+ * system call/exception.  It should be a multiple of 8 bytes to preserve
+ * normal stack alignment rules.
+ *
+ * Must track <sys/ucontext.h> and <sys/procfs.h>
+ */
+struct pt_regs {
+        /* Saved main processor registers; 56..63 are special. */
+        /* tp, sp, and lr must immediately follow regs[] for aliasing. */
+        pt_reg_t regs[53];
+        pt_reg_t tp;            /* aliases regs[TREG_TP] */
+        pt_reg_t sp;            /* aliases regs[TREG_SP] */
+        pt_reg_t lr;            /* aliases regs[TREG_LR] */
+
+        /* Saved special registers. */
+        pt_reg_t pc;            /* stored in EX_CONTEXT_1_0 */
+        pt_reg_t ex1;           /* stored in EX_CONTEXT_1_1 (PL and ICS bit) */
+        pt_reg_t faultnum;      /* fault number (INT_SWINT_1 for syscall) */
+        pt_reg_t orig_r0;       /* r0 at syscall entry, else zero */
+        pt_reg_t flags;         /* flags (see below) */
+#if !CHIP_HAS_CMPEXCH()
+        pt_reg_t pad[3];
+#else
+        pt_reg_t cmpexch;       /* value of CMPEXCH_VALUE SPR at interrupt */
+        pt_reg_t pad[2];
+#endif
+};
+
+#endif /* __ASSEMBLY__ */
+
+/* Flag bits in pt_regs.flags */
+#define PT_FLAGS_DISABLE_IRQ    1  /* on return to kernel, disable irqs */
+#define PT_FLAGS_CALLER_SAVES   2  /* caller-save registers are valid */
+#define PT_FLAGS_RESTORE_REGS   4  /* restore callee-save regs on return */
+
+#define PTRACE_GETREGS          12
+#define PTRACE_SETREGS          13
+#define PTRACE_GETFPREGS        14
+#define PTRACE_SETFPREGS        15
+
+/* Support TILE-specific ptrace options, with events starting at 16. */
+#define PTRACE_O_TRACEMIGRATE   0x00010000
+#define PTRACE_EVENT_MIGRATE    16
+#ifdef __KERNEL__
+#define PTRACE_O_MASK_TILE      (PTRACE_O_TRACEMIGRATE)
+#define PT_TRACE_MIGRATE        0x00080000
+#define PT_TRACE_MASK_TILE      (PT_TRACE_MIGRATE)
+#endif
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#define instruction_pointer(regs) ((regs)->pc)
+#define profile_pc(regs) instruction_pointer(regs)
+
+/* Does the process account for user or for system time? */
+#define user_mode(regs) (EX1_PL((regs)->ex1) == USER_PL)
+
+/* Fill in a struct pt_regs with the current kernel registers. */
+struct pt_regs *get_pt_regs(struct pt_regs *);
+
+/* Trace the current syscall. */
+extern void do_syscall_trace(void);
+
+extern void show_regs(struct pt_regs *);
+
+#define arch_has_single_step()  (1)
+
+/*
+ * A structure for all single-stepper state.
+ *
+ * Also update defines in assembler section if it changes
+ */
+struct single_step_state {
+        /* the page to which we will write hacked-up bundles */
+        void __user *buffer;
+
+        union {
+                int flags;
+                struct {
+                        unsigned long is_enabled:1, update:1, update_reg:6;
+                };
+        };
+
+        unsigned long orig_pc;          /* the original PC */
+        unsigned long next_pc;          /* return PC if no branch (PC + 1) */
+        unsigned long branch_next_pc;   /* return PC if we did branch/jump */
+        unsigned long update_value;     /* value to restore to update_target */
+};
+
+/* Single-step the instruction at regs->pc */
+extern void single_step_once(struct pt_regs *regs);
+
+struct task_struct;
+
+extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
+                         int error_code);
+
+#ifdef __tilegx__
+/* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */
+#define __ARCH_WANT_COMPAT_SYS_PTRACE
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#define SINGLESTEP_STATE_MASK_IS_ENABLED      0x1
+#define SINGLESTEP_STATE_MASK_UPDATE          0x2
+#define SINGLESTEP_STATE_TARGET_LB              2
+#define SINGLESTEP_STATE_TARGET_UB              7
+
+#endif /* !__KERNEL__ */
+
+#endif /* _ASM_TILE_PTRACE_H */
diff --git a/arch/tile/include/asm/resource.h b/arch/tile/include/asm/resource.h
new file mode 100644
index 000000000000..04bc4db8921b
--- /dev/null
+++ b/arch/tile/include/asm/resource.h
@@ -0,0 +1 @@
+#include <asm-generic/resource.h>
diff --git a/arch/tile/include/asm/scatterlist.h b/arch/tile/include/asm/scatterlist.h
new file mode 100644
index 000000000000..35d786fe93ae
--- /dev/null
+++ b/arch/tile/include/asm/scatterlist.h
@@ -0,0 +1 @@
+#include <asm-generic/scatterlist.h>
diff --git a/arch/tile/include/asm/sections.h b/arch/tile/include/asm/sections.h
new file mode 100644
index 000000000000..d062d463fca9
--- /dev/null
+++ b/arch/tile/include/asm/sections.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SECTIONS_H
+#define _ASM_TILE_SECTIONS_H
+
+#define arch_is_kernel_data arch_is_kernel_data
+
+#include <asm-generic/sections.h>
+
+/* Text and data are at different areas in the kernel VA space. */
+extern char _sinitdata[], _einitdata[];
+
+/* Write-once data is writable only till the end of initialization. */
+extern char __w1data_begin[], __w1data_end[];
+
+
+/* Not exactly sections, but PC comparison points in the code. */
+extern char __rt_sigreturn[], __rt_sigreturn_end[];
+#ifndef __tilegx__
+extern char sys_cmpxchg[], __sys_cmpxchg_end[];
+extern char __sys_cmpxchg_grab_lock[];
+extern char __start_atomic_asm_code[], __end_atomic_asm_code[];
+#endif
+
+/* Handle the discontiguity between _sdata and _stext. */
+static inline int arch_is_kernel_data(unsigned long addr)
+{
+        return addr >= (unsigned long)_sdata &&
+                addr < (unsigned long)_end;
+}
+
+#endif /* _ASM_TILE_SECTIONS_H */
diff --git a/arch/tile/include/asm/sembuf.h b/arch/tile/include/asm/sembuf.h
new file mode 100644
index 000000000000..7673b83cfef7
--- /dev/null
+++ b/arch/tile/include/asm/sembuf.h
@@ -0,0 +1 @@
+#include <asm-generic/sembuf.h>
diff --git a/arch/tile/include/asm/setup.h b/arch/tile/include/asm/setup.h
new file mode 100644
index 000000000000..7caf0f36b030
--- /dev/null
+++ b/arch/tile/include/asm/setup.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SETUP_H
+#define _ASM_TILE_SETUP_H
+
+#define COMMAND_LINE_SIZE       2048
+
+#ifdef __KERNEL__
+
+#include <linux/pfn.h>
+#include <linux/init.h>
+
+/*
+ * Reserved space for vmalloc and iomap - defined in asm/page.h
+ */
+#define MAXMEM_PFN      PFN_DOWN(MAXMEM)
+
+void early_panic(const char *fmt, ...);
+void warn_early_printk(void);
+void __init disable_early_printk(void);
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_TILE_SETUP_H */
diff --git a/arch/tile/include/asm/shmbuf.h b/arch/tile/include/asm/shmbuf.h
new file mode 100644
index 000000000000..83c05fc2de38
--- /dev/null
+++ b/arch/tile/include/asm/shmbuf.h
@@ -0,0 +1 @@
+#include <asm-generic/shmbuf.h>
diff --git a/arch/tile/include/asm/shmparam.h b/arch/tile/include/asm/shmparam.h
new file mode 100644
index 000000000000..93f30deb95d0
--- /dev/null
+++ b/arch/tile/include/asm/shmparam.h
@@ -0,0 +1 @@
+#include <asm-generic/shmparam.h>
diff --git a/arch/tile/include/asm/sigcontext.h b/arch/tile/include/asm/sigcontext.h
new file mode 100644
index 000000000000..7cd7672e3ad4
--- /dev/null
+++ b/arch/tile/include/asm/sigcontext.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SIGCONTEXT_H
+#define _ASM_TILE_SIGCONTEXT_H
+
+/* NOTE: we can't include <linux/ptrace.h> due to #include dependencies. */
+#include <asm/ptrace.h>
+
+/* Must track <sys/ucontext.h> */
+
+struct sigcontext {
+        struct pt_regs regs;
+};
+
+#endif /* _ASM_TILE_SIGCONTEXT_H */
diff --git a/arch/tile/include/asm/sigframe.h b/arch/tile/include/asm/sigframe.h
new file mode 100644
index 000000000000..994d3d30205f
--- /dev/null
+++ b/arch/tile/include/asm/sigframe.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SIGFRAME_H
+#define _ASM_TILE_SIGFRAME_H
+
+/* Indicate that syscall return should not examine r0 */
+#define INT_SWINT_1_SIGRETURN (~0)
+
+#ifndef __ASSEMBLY__
+
+#include <arch/abi.h>
+
+struct rt_sigframe {
+        unsigned char save_area[C_ABI_SAVE_AREA_SIZE]; /* caller save area */
+        struct siginfo info;
+        struct ucontext uc;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_SIGFRAME_H */
diff --git a/arch/tile/include/asm/siginfo.h b/arch/tile/include/asm/siginfo.h
new file mode 100644
index 000000000000..56d661bb010b
--- /dev/null
+++ b/arch/tile/include/asm/siginfo.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SIGINFO_H
+#define _ASM_TILE_SIGINFO_H
+
+#define __ARCH_SI_TRAPNO
+
+#ifdef __LP64__
+# define __ARCH_SI_PREAMBLE_SIZE        (4 * sizeof(int))
+#endif
+
+#include <asm-generic/siginfo.h>
+
+/*
+ * Additional Tile-specific SIGILL si_codes
+ */
+#define ILL_DBLFLT      (__SI_FAULT|9)  /* double fault */
+#define ILL_HARDWALL    (__SI_FAULT|10) /* user networks hardwall violation */
+#undef NSIGILL
+#define NSIGILL         10
+
+#endif /* _ASM_TILE_SIGINFO_H */
diff --git a/arch/tile/include/asm/signal.h b/arch/tile/include/asm/signal.h
new file mode 100644
index 000000000000..eb0253f32202
--- /dev/null
+++ b/arch/tile/include/asm/signal.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SIGNAL_H
+#define _ASM_TILE_SIGNAL_H
+
+/* Do not notify a ptracer when this signal is handled. */
+#define SA_NOPTRACE 0x02000000u
+
+/* Used in earlier Tilera releases, so keeping for binary compatibility. */
+#define SA_RESTORER 0x04000000u
+
+#include <asm-generic/signal.h>
+
+#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
+int restore_sigcontext(struct pt_regs *, struct sigcontext __user *, long *);
+int setup_sigcontext(struct sigcontext __user *, struct pt_regs *);
+void do_signal(struct pt_regs *regs);
+#endif
+
+#endif /* _ASM_TILE_SIGNAL_H */
diff --git a/arch/tile/include/asm/smp.h b/arch/tile/include/asm/smp.h
new file mode 100644
index 000000000000..532124ae4b12
--- /dev/null
+++ b/arch/tile/include/asm/smp.h
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SMP_H
+#define _ASM_TILE_SMP_H
+
+#ifdef CONFIG_SMP
+
+#include <asm/processor.h>
+#include <linux/cpumask.h>
+#include <linux/irqreturn.h>
+#include <hv/hypervisor.h>
+
+/* Set up this tile to support receiving hypervisor messages */
+void init_messaging(void);
+
+/* Set up this tile to support receiving device interrupts and IPIs. */
+void init_per_tile_IRQs(void);
+
+/* Send a message to processors specified in mask */
+void send_IPI_many(const struct cpumask *mask, int tag);
+
+/* Send a message to all but the sending processor */
+void send_IPI_allbutself(int tag);
+
+/* Send a message to a specific processor */
+void send_IPI_single(int dest, int tag);
+
+/* Process an IPI message */
+void evaluate_message(int tag);
+
+/* Boot a secondary cpu */
+void online_secondary(void);
+
+/* Call a function on a specified set of CPUs (may include this one). */
+extern void on_each_cpu_mask(const struct cpumask *mask,
+                             void (*func)(void *), void *info, bool wait);
+
+/* Topology of the supervisor tile grid, and coordinates of boot processor */
+extern HV_Topology smp_topology;
+
+/* Accessors for grid size */
+#define smp_height              (smp_topology.height)
+#define smp_width               (smp_topology.width)
+
+/* Convenience functions for converting cpu <-> coords. */
+static inline int cpu_x(int cpu)
+{
+        return cpu % smp_width;
+}
+static inline int cpu_y(int cpu)
+{
+        return cpu / smp_width;
+}
+static inline int xy_to_cpu(int x, int y)
+{
+        return y * smp_width + x;
+}
+
+/* Hypervisor message tags sent via the tile send_IPI*() routines. */
+#define MSG_TAG_START_CPU               1
+#define MSG_TAG_STOP_CPU                2
+#define MSG_TAG_CALL_FUNCTION_MANY      3
+#define MSG_TAG_CALL_FUNCTION_SINGLE    4
+
+/* Hook for the generic smp_call_function_many() routine. */
+static inline void arch_send_call_function_ipi_mask(struct cpumask *mask)
+{
+        send_IPI_many(mask, MSG_TAG_CALL_FUNCTION_MANY);
+}
+
+/* Hook for the generic smp_call_function_single() routine. */
+static inline void arch_send_call_function_single_ipi(int cpu)
+{
+        send_IPI_single(cpu, MSG_TAG_CALL_FUNCTION_SINGLE);
+}
+
+/* Print out the boot string describing which cpus were disabled. */
+void print_disabled_cpus(void);
+
+#else /* !CONFIG_SMP */
+
+#define on_each_cpu_mask(mask, func, info, wait)                \
+  do { if (cpumask_test_cpu(0, (mask))) func(info); } while (0)
+
+#define smp_master_cpu          0
+#define smp_height              1
+#define smp_width               1
+#define cpu_x(cpu)              0
+#define cpu_y(cpu)              0
+#define xy_to_cpu(x, y)         0
+
+#endif /* !CONFIG_SMP */
+
+
+/* Which cpus may be used as the lotar in a page table entry. */
+extern struct cpumask cpu_lotar_map;
+#define cpu_is_valid_lotar(cpu) cpumask_test_cpu((cpu), &cpu_lotar_map)
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+/* Which processors are used for hash-for-home mapping */
+extern struct cpumask hash_for_home_map;
+#endif
+
+/* Which cpus can have their cache flushed by hv_flush_remote(). */
+extern struct cpumask cpu_cacheable_map;
+#define cpu_cacheable(cpu) cpumask_test_cpu((cpu), &cpu_cacheable_map)
+
+/* Convert an HV_LOTAR value into a cpu. */
+static inline int hv_lotar_to_cpu(HV_LOTAR lotar)
+{
+        return HV_LOTAR_X(lotar) + (HV_LOTAR_Y(lotar) * smp_width);
+}
+
+/*
+ * Extension of <linux/cpumask.h> functionality when you just want
+ * to express a mask or suppression or inclusion region without
+ * being too concerned about exactly which cpus are valid in that region.
+ */
+int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits);
+
+#define cpulist_parse_crop(buf, dst) \
+                        __cpulist_parse_crop((buf), (dst), NR_CPUS)
+static inline int __cpulist_parse_crop(const char *buf, struct cpumask *dstp,
+                                        int nbits)
+{
+        return bitmap_parselist_crop(buf, cpumask_bits(dstp), nbits);
+}
+
+/* Initialize the IPI subsystem. */
+void ipi_init(void);
+
+/* Function for start-cpu message to cause us to jump to. */
+extern unsigned long start_cpu_function_addr;
+
+#endif /* _ASM_TILE_SMP_H */
diff --git a/arch/tile/include/asm/socket.h b/arch/tile/include/asm/socket.h
new file mode 100644
index 000000000000..6b71384b9d8b
--- /dev/null
+++ b/arch/tile/include/asm/socket.h
@@ -0,0 +1 @@
+#include <asm-generic/socket.h>
diff --git a/arch/tile/include/asm/sockios.h b/arch/tile/include/asm/sockios.h
new file mode 100644
index 000000000000..def6d4746ee7
--- /dev/null
+++ b/arch/tile/include/asm/sockios.h
@@ -0,0 +1 @@
+#include <asm-generic/sockios.h>
diff --git a/arch/tile/include/asm/spinlock.h b/arch/tile/include/asm/spinlock.h
new file mode 100644
index 000000000000..1a8bd4740c28
--- /dev/null
+++ b/arch/tile/include/asm/spinlock.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SPINLOCK_H
+#define _ASM_TILE_SPINLOCK_H
+
+#ifdef __tilegx__
+#include <asm/spinlock_64.h>
+#else
+#include <asm/spinlock_32.h>
+#endif
+
+#endif /* _ASM_TILE_SPINLOCK_H */
diff --git a/arch/tile/include/asm/spinlock_32.h b/arch/tile/include/asm/spinlock_32.h
new file mode 100644
index 000000000000..88efdde8dd2b
--- /dev/null
+++ b/arch/tile/include/asm/spinlock_32.h
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * 32-bit SMP spinlocks.
+ */
+
+#ifndef _ASM_TILE_SPINLOCK_32_H
+#define _ASM_TILE_SPINLOCK_32_H
+
+#include <asm/atomic.h>
+#include <asm/page.h>
+#include <asm/system.h>
+#include <linux/compiler.h>
+
+/*
+ * We only use even ticket numbers so the '1' inserted by a tns is
+ * an unambiguous "ticket is busy" flag.
+ */
+#define TICKET_QUANTUM 2
+
+
+/*
+ * SMP ticket spinlocks, allowing only a single CPU anywhere
+ *
+ * (the type definitions are in asm/spinlock_types.h)
+ */
+static inline int arch_spin_is_locked(arch_spinlock_t *lock)
+{
+        /*
+         * Note that even if a new ticket is in the process of being
+         * acquired, so lock->next_ticket is 1, it's still reasonable
+         * to claim the lock is held, since it will be momentarily
+         * if not already.  There's no need to wait for a "valid"
+         * lock->next_ticket to become available.
+         */
+        return lock->next_ticket != lock->current_ticket;
+}
+
+void arch_spin_lock(arch_spinlock_t *lock);
+
+/* We cannot take an interrupt after getting a ticket, so don't enable them. */
+#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)
+
+int arch_spin_trylock(arch_spinlock_t *lock);
+
+static inline void arch_spin_unlock(arch_spinlock_t *lock)
+{
+        /* For efficiency, overlap fetching the old ticket with the wmb(). */
+        int old_ticket = lock->current_ticket;
+        wmb();  /* guarantee anything modified under the lock is visible */
+        lock->current_ticket = old_ticket + TICKET_QUANTUM;
+}
+
+void arch_spin_unlock_wait(arch_spinlock_t *lock);
+
+/*
+ * Read-write spinlocks, allowing multiple readers
+ * but only one writer.
+ *
+ * We use a "tns/store-back" technique on a single word to manage
+ * the lock state, looping around to retry if the tns returns 1.
+ */
+
+/* Internal layout of the word; do not use. */
+#define _WR_NEXT_SHIFT  8
+#define _WR_CURR_SHIFT  16
+#define _WR_WIDTH       8
+#define _RD_COUNT_SHIFT 24
+#define _RD_COUNT_WIDTH 8
+
+/* Internal functions; do not use. */
+void arch_read_lock_slow(arch_rwlock_t *, u32);
+int arch_read_trylock_slow(arch_rwlock_t *);
+void arch_read_unlock_slow(arch_rwlock_t *);
+void arch_write_lock_slow(arch_rwlock_t *, u32);
+void arch_write_unlock_slow(arch_rwlock_t *, u32);
+
+/**
+ * arch_read_can_lock() - would read_trylock() succeed?
+ */
+static inline int arch_read_can_lock(arch_rwlock_t *rwlock)
+{
+        return (rwlock->lock << _RD_COUNT_WIDTH) == 0;
+}
+
+/**
+ * arch_write_can_lock() - would write_trylock() succeed?
+ */
+static inline int arch_write_can_lock(arch_rwlock_t *rwlock)
+{
+        return rwlock->lock == 0;
+}
+
+/**
+ * arch_read_lock() - acquire a read lock.
+ */
+static inline void arch_read_lock(arch_rwlock_t *rwlock)
+{
+        u32 val = __insn_tns((int *)&rwlock->lock);
+        if (unlikely(val << _RD_COUNT_WIDTH)) {
+                arch_read_lock_slow(rwlock, val);
+                return;
+        }
+        rwlock->lock = val + (1 << _RD_COUNT_SHIFT);
+}
+
+/**
+ * arch_read_lock() - acquire a write lock.
+ */
+static inline void arch_write_lock(arch_rwlock_t *rwlock)
+{
+        u32 val = __insn_tns((int *)&rwlock->lock);
+        if (unlikely(val != 0)) {
+                arch_write_lock_slow(rwlock, val);
+                return;
+        }
+        rwlock->lock = 1 << _WR_NEXT_SHIFT;
+}
+
+/**
+ * arch_read_trylock() - try to acquire a read lock.
+ */
+static inline int arch_read_trylock(arch_rwlock_t *rwlock)
+{
+        int locked;
+        u32 val = __insn_tns((int *)&rwlock->lock);
+        if (unlikely(val & 1))
+                return arch_read_trylock_slow(rwlock);
+        locked = (val << _RD_COUNT_WIDTH) == 0;
+        rwlock->lock = val + (locked << _RD_COUNT_SHIFT);
+        return locked;
+}
+
+/**
+ * arch_write_trylock() - try to acquire a write lock.
+ */
+static inline int arch_write_trylock(arch_rwlock_t *rwlock)
+{
+        u32 val = __insn_tns((int *)&rwlock->lock);
+
+        /*
+         * If a tns is in progress, or there's a waiting or active locker,
+         * or active readers, we can't take the lock, so give up.
+         */
+        if (unlikely(val != 0)) {
+                if (!(val & 1))
+                        rwlock->lock = val;
+                return 0;
+        }
+
+        /* Set the "next" field to mark it locked. */
+        rwlock->lock = 1 << _WR_NEXT_SHIFT;
+        return 1;
+}
+
+/**
+ * arch_read_unlock() - release a read lock.
+ */
+static inline void arch_read_unlock(arch_rwlock_t *rwlock)
+{
+        u32 val;
+        mb();  /* guarantee anything modified under the lock is visible */
+        val = __insn_tns((int *)&rwlock->lock);
+        if (unlikely(val & 1)) {
+                arch_read_unlock_slow(rwlock);
+                return;
+        }
+        rwlock->lock = val - (1 << _RD_COUNT_SHIFT);
+}
+
+/**
+ * arch_write_unlock() - release a write lock.
+ */
+static inline void arch_write_unlock(arch_rwlock_t *rwlock)
+{
+        u32 val;
+        mb();  /* guarantee anything modified under the lock is visible */
+        val = __insn_tns((int *)&rwlock->lock);
+        if (unlikely(val != (1 << _WR_NEXT_SHIFT))) {
+                arch_write_unlock_slow(rwlock, val);
+                return;
+        }
+        rwlock->lock = 0;
+}
+
+#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
+#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
+
+#endif /* _ASM_TILE_SPINLOCK_32_H */
diff --git a/arch/tile/include/asm/spinlock_types.h b/arch/tile/include/asm/spinlock_types.h
new file mode 100644
index 000000000000..a71f59b49c50
--- /dev/null
+++ b/arch/tile/include/asm/spinlock_types.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SPINLOCK_TYPES_H
+#define _ASM_TILE_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+#ifdef __tilegx__
+
+/* Low 15 bits are "next"; high 15 bits are "current". */
+typedef struct arch_spinlock {
+        unsigned int lock;
+} arch_spinlock_t;
+
+#define __ARCH_SPIN_LOCK_UNLOCKED       { 0 }
+
+/* High bit is "writer owns"; low 31 bits are a count of readers. */
+typedef struct arch_rwlock {
+        unsigned int lock;
+} arch_rwlock_t;
+
+#define __ARCH_RW_LOCK_UNLOCKED         { 0 }
+
+#else
+
+typedef struct arch_spinlock {
+        /* Next ticket number to hand out. */
+        int next_ticket;
+        /* The ticket number that currently owns this lock. */
+        int current_ticket;
+} arch_spinlock_t;
+
+#define __ARCH_SPIN_LOCK_UNLOCKED       { 0, 0 }
+
+/*
+ * Byte 0 for tns (only the low bit is used), byte 1 for ticket-lock "next",
+ * byte 2 for ticket-lock "current", byte 3 for reader count.
+ */
+typedef struct arch_rwlock {
+        unsigned int lock;
+} arch_rwlock_t;
+
+#define __ARCH_RW_LOCK_UNLOCKED         { 0 }
+
+#endif
+#endif /* _ASM_TILE_SPINLOCK_TYPES_H */
diff --git a/arch/tile/include/asm/stack.h b/arch/tile/include/asm/stack.h
new file mode 100644
index 000000000000..f908473c322d
--- /dev/null
+++ b/arch/tile/include/asm/stack.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_STACK_H
+#define _ASM_TILE_STACK_H
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <asm/backtrace.h>
+#include <hv/hypervisor.h>
+
+/* Everything we need to keep track of a backtrace iteration */
+struct KBacktraceIterator {
+        BacktraceIterator it;
+        struct task_struct *task;     /* task we are backtracing */
+        HV_PTE *pgtable;              /* page table for user space access */
+        int end;                      /* iteration complete. */
+        int new_context;              /* new context is starting */
+        int profile;                  /* profiling, so stop on async intrpt */
+        int verbose;                  /* printk extra info (don't want to
+                                       * do this for profiling) */
+        int is_current;               /* backtracing current task */
+};
+
+/* Iteration methods for kernel backtraces */
+
+/*
+ * Initialize a KBacktraceIterator from a task_struct, and optionally from
+ * a set of registers.  If the registers are omitted, the process is
+ * assumed to be descheduled, and registers are read from the process's
+ * thread_struct and stack.  "verbose" means to printk some additional
+ * information about fault handlers as we pass them on the stack.
+ */
+extern void KBacktraceIterator_init(struct KBacktraceIterator *kbt,
+                                    struct task_struct *, struct pt_regs *);
+
+/* Initialize iterator based on current stack. */
+extern void KBacktraceIterator_init_current(struct KBacktraceIterator *kbt);
+
+/* Helper method for above. */
+extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt,
+                                ulong pc, ulong lr, ulong sp, ulong r52);
+
+/* No more frames? */
+extern int KBacktraceIterator_end(struct KBacktraceIterator *kbt);
+
+/* Advance to the next frame. */
+extern void KBacktraceIterator_next(struct KBacktraceIterator *kbt);
+
+/*
+ * Dump stack given complete register info. Use only from the
+ * architecture-specific code; show_stack()
+ * and dump_stack() (in entry.S) are architecture-independent entry points.
+ */
+extern void tile_show_stack(struct KBacktraceIterator *, int headers);
+
+/* Dump stack of current process, with registers to seed the backtrace. */
+extern void dump_stack_regs(struct pt_regs *);
+
+/* Helper method for assembly dump_stack(). */
+extern void _dump_stack(int dummy, ulong pc, ulong lr, ulong sp, ulong r52);
+
+#endif /* _ASM_TILE_STACK_H */
diff --git a/arch/tile/include/asm/stat.h b/arch/tile/include/asm/stat.h
new file mode 100644
index 000000000000..3dc90fa92c70
--- /dev/null
+++ b/arch/tile/include/asm/stat.h
@@ -0,0 +1 @@
+#include <asm-generic/stat.h>
diff --git a/arch/tile/include/asm/statfs.h b/arch/tile/include/asm/statfs.h
new file mode 100644
index 000000000000..0b91fe198c20
--- /dev/null
+++ b/arch/tile/include/asm/statfs.h
@@ -0,0 +1 @@
+#include <asm-generic/statfs.h>
diff --git a/arch/tile/include/asm/string.h b/arch/tile/include/asm/string.h
new file mode 100644
index 000000000000..7535cf1a30e4
--- /dev/null
+++ b/arch/tile/include/asm/string.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_STRING_H
+#define _ASM_TILE_STRING_H
+
+#define __HAVE_ARCH_MEMCHR
+#define __HAVE_ARCH_MEMSET
+#define __HAVE_ARCH_MEMCPY
+#define __HAVE_ARCH_MEMMOVE
+#define __HAVE_ARCH_STRCHR
+#define __HAVE_ARCH_STRLEN
+
+extern __kernel_size_t strlen(const char *);
+extern char *strchr(const char *s, int c);
+extern void *memchr(const void *s, int c, size_t n);
+extern void *memset(void *, int, __kernel_size_t);
+extern void *memcpy(void *, const void *, __kernel_size_t);
+extern void *memmove(void *, const void *, __kernel_size_t);
+
+#endif /* _ASM_TILE_STRING_H */
diff --git a/arch/tile/include/asm/swab.h b/arch/tile/include/asm/swab.h
new file mode 100644
index 000000000000..25c686a00f1d
--- /dev/null
+++ b/arch/tile/include/asm/swab.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SWAB_H
+#define _ASM_TILE_SWAB_H
+
+/* Tile gcc is always >= 4.3.0, so we use __builtin_bswap. */
+#define __arch_swab32(x) __builtin_bswap32(x)
+#define __arch_swab64(x) __builtin_bswap64(x)
+
+/* Use the variant that is natural for the wordsize. */
+#ifdef CONFIG_64BIT
+#define __arch_swab16(x) (__builtin_bswap64(x) >> 48)
+#else
+#define __arch_swab16(x) (__builtin_bswap32(x) >> 16)
+#endif
+
+#endif /* _ASM_TILE_SWAB_H */
diff --git a/arch/tile/include/asm/syscall.h b/arch/tile/include/asm/syscall.h
new file mode 100644
index 000000000000..d35e0dcb67b1
--- /dev/null
+++ b/arch/tile/include/asm/syscall.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_TILE_SYSCALL_H
+#define _ASM_TILE_SYSCALL_H
+
+#include <linux/sched.h>
+#include <linux/err.h>
+#include <arch/abi.h>
+
+/*
+ * Only the low 32 bits of orig_r0 are meaningful, so we return int.
+ * This importantly ignores the high bits on 64-bit, so comparisons
+ * sign-extend the low 32 bits.
+ */
+static inline int syscall_get_nr(struct task_struct *t, struct pt_regs *regs)
+{
+        return regs->regs[TREG_SYSCALL_NR];
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+                                    struct pt_regs *regs)
+{
+        regs->regs[0] = regs->orig_r0;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+                                     struct pt_regs *regs)
+{
+        unsigned long error = regs->regs[0];
+        return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+                                            struct pt_regs *regs)
+{
+        return regs->regs[0];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+                                            struct pt_regs *regs,
+                                            int error, long val)
+{
+        regs->regs[0] = (long) error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         unsigned long *args)
+{
+        BUG_ON(i + n > 6);
+        memcpy(args, &regs[i], n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         const unsigned long *args)
+{
+        BUG_ON(i + n > 6);
+        memcpy(&regs[i], args, n * sizeof(args[0]));
+}
+
+#endif  /* _ASM_TILE_SYSCALL_H */
diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h
new file mode 100644
index 000000000000..af165a74537f
--- /dev/null
+++ b/arch/tile/include/asm/syscalls.h
@@ -0,0 +1,108 @@
+/*
+ * syscalls.h - Linux syscall interfaces (arch-specific)
+ *
+ * Copyright (c) 2008 Jaswinder Singh Rajput
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SYSCALLS_H
+#define _ASM_TILE_SYSCALLS_H
+
+#include <linux/compiler.h>
+#include <linux/linkage.h>
+#include <linux/signal.h>
+#include <linux/types.h>
+#include <linux/compat.h>
+
+/* The array of function pointers for syscalls. */
+extern void *sys_call_table[];
+#ifdef CONFIG_COMPAT
+extern void *compat_sys_call_table[];
+#endif
+
+/*
+ * Note that by convention, any syscall which requires the current
+ * register set takes an additional "struct pt_regs *" pointer; the
+ * sys_xxx() function just adds the pointer and tail-calls to _sys_xxx().
+ */
+
+/* kernel/sys.c */
+ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count);
+long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi,
+                     u32 len, int advice);
+int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi,
+                       u32 len_lo, u32 len_hi, int advice);
+long sys_flush_cache(void);
+long sys_mmap2(unsigned long addr, unsigned long len,
+               unsigned long prot, unsigned long flags,
+               unsigned long fd, unsigned long pgoff);
+#ifdef __tilegx__
+long sys_mmap(unsigned long addr, unsigned long len,
+              unsigned long prot, unsigned long flags,
+              unsigned long fd, off_t pgoff);
+#endif
+
+/* kernel/process.c */
+long sys_clone(unsigned long clone_flags, unsigned long newsp,
+               void __user *parent_tid, void __user *child_tid);
+long _sys_clone(unsigned long clone_flags, unsigned long newsp,
+                void __user *parent_tid, void __user *child_tid,
+                struct pt_regs *regs);
+long sys_fork(void);
+long _sys_fork(struct pt_regs *regs);
+long sys_vfork(void);
+long _sys_vfork(struct pt_regs *regs);
+long sys_execve(char __user *filename, char __user * __user *argv,
+                char __user * __user *envp);
+long _sys_execve(char __user *filename, char __user * __user *argv,
+                 char __user * __user *envp, struct pt_regs *regs);
+
+/* kernel/signal.c */
+long sys_sigaltstack(const stack_t __user *, stack_t __user *);
+long _sys_sigaltstack(const stack_t __user *, stack_t __user *,
+                      struct pt_regs *);
+long sys_rt_sigreturn(void);
+long _sys_rt_sigreturn(struct pt_regs *regs);
+
+/* platform-independent functions */
+long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize);
+long sys_rt_sigaction(int sig, const struct sigaction __user *act,
+                      struct sigaction __user *oact, size_t sigsetsize);
+
+#ifndef __tilegx__
+/* mm/fault.c */
+int sys_cmpxchg_badaddr(unsigned long address);
+int _sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *);
+#endif
+
+#ifdef CONFIG_COMPAT
+long compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
+                       compat_uptr_t __user *envp);
+long _compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
+                        compat_uptr_t __user *envp, struct pt_regs *regs);
+long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
+                            struct compat_sigaltstack __user *uoss_ptr);
+long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
+                             struct compat_sigaltstack __user *uoss_ptr,
+                             struct pt_regs *regs);
+long compat_sys_rt_sigreturn(void);
+long _compat_sys_rt_sigreturn(struct pt_regs *regs);
+
+/* These four are not defined for 64-bit, but serve as "compat" syscalls. */
+long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg);
+long sys_fstat64(unsigned long fd, struct stat64 __user *statbuf);
+long sys_truncate64(const char __user *path, loff_t length);
+long sys_ftruncate64(unsigned int fd, loff_t length);
+#endif
+
+#endif /* _ASM_TILE_SYSCALLS_H */
diff --git a/arch/tile/include/asm/system.h b/arch/tile/include/asm/system.h
new file mode 100644
index 000000000000..f749be327ce0
--- /dev/null
+++ b/arch/tile/include/asm/system.h
@@ -0,0 +1,248 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_SYSTEM_H
+#define _ASM_TILE_SYSTEM_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <linux/irqflags.h>
+
+/* NOTE: we can't include <linux/ptrace.h> due to #include dependencies. */
+#include <asm/ptrace.h>
+
+#include <arch/chip.h>
+#include <arch/sim_def.h>
+#include <arch/spr_def.h>
+
+/*
+ * read_barrier_depends - Flush all pending reads that subsequents reads
+ * depend on.
+ *
+ * No data-dependent reads from memory-like regions are ever reordered
+ * over this barrier.  All reads preceding this primitive are guaranteed
+ * to access memory (but not necessarily other CPUs' caches) before any
+ * reads following this primitive that depend on the data return by
+ * any of the preceding reads.  This primitive is much lighter weight than
+ * rmb() on most CPUs, and is never heavier weight than is
+ * rmb().
+ *
+ * These ordering constraints are respected by both the local CPU
+ * and the compiler.
+ *
+ * Ordering is not guaranteed by anything other than these primitives,
+ * not even by data dependencies.  See the documentation for
+ * memory_barrier() for examples and URLs to more information.
+ *
+ * For example, the following code would force ordering (the initial
+ * value of "a" is zero, "b" is one, and "p" is "&a"):
+ *
+ * <programlisting>
+ *      CPU 0                           CPU 1
+ *
+ *      b = 2;
+ *      memory_barrier();
+ *      p = &b;                         q = p;
+ *                                      read_barrier_depends();
+ *                                      d = *q;
+ * </programlisting>
+ *
+ * because the read of "*q" depends on the read of "p" and these
+ * two reads are separated by a read_barrier_depends().  However,
+ * the following code, with the same initial values for "a" and "b":
+ *
+ * <programlisting>
+ *      CPU 0                           CPU 1
+ *
+ *      a = 2;
+ *      memory_barrier();
+ *      b = 3;                          y = b;
+ *                                      read_barrier_depends();
+ *                                      x = a;
+ * </programlisting>
+ *
+ * does not enforce ordering, since there is no data dependency between
+ * the read of "a" and the read of "b".  Therefore, on some CPUs, such
+ * as Alpha, "y" could be set to 3 and "x" to 0.  Use rmb()
+ * in cases like this where there are no data dependencies.
+ */
+
+#define read_barrier_depends()  do { } while (0)
+
+#define __sync()        __insn_mf()
+
+#if CHIP_HAS_SPLIT_CYCLE()
+#define get_cycles_low() __insn_mfspr(SPR_CYCLE_LOW)
+#else
+#define get_cycles_low() __insn_mfspr(SPR_CYCLE)   /* just get all 64 bits */
+#endif
+
+/* Fence to guarantee visibility of stores to incoherent memory. */
+static inline void
+mb_incoherent(void)
+{
+        __insn_mf();
+
+#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS()
+        {
+                int __mb_incoherent(void);
+#if CHIP_HAS_TILE_WRITE_PENDING()
+                const unsigned long WRITE_TIMEOUT_CYCLES = 400;
+                unsigned long start = get_cycles_low();
+                do {
+                        if (__insn_mfspr(SPR_TILE_WRITE_PENDING) == 0)
+                                return;
+                } while ((get_cycles_low() - start) < WRITE_TIMEOUT_CYCLES);
+#endif /* CHIP_HAS_TILE_WRITE_PENDING() */
+                (void) __mb_incoherent();
+        }
+#endif /* CHIP_HAS_MF_WAITS_FOR_VICTIMS() */
+}
+
+#define fast_wmb()      __sync()
+#define fast_rmb()      __sync()
+#define fast_mb()       __sync()
+#define fast_iob()      mb_incoherent()
+
+#define wmb()           fast_wmb()
+#define rmb()           fast_rmb()
+#define mb()            fast_mb()
+#define iob()           fast_iob()
+
+#ifdef CONFIG_SMP
+#define smp_mb()        mb()
+#define smp_rmb()       rmb()
+#define smp_wmb()       wmb()
+#define smp_read_barrier_depends()      read_barrier_depends()
+#else
+#define smp_mb()        barrier()
+#define smp_rmb()       barrier()
+#define smp_wmb()       barrier()
+#define smp_read_barrier_depends()      do { } while (0)
+#endif
+
+#define set_mb(var, value) \
+        do { var = value; mb(); } while (0)
+
+/*
+ * Pause the DMA engine and static network before task switching.
+ */
+#define prepare_arch_switch(next) _prepare_arch_switch(next)
+void _prepare_arch_switch(struct task_struct *next);
+
+
+/*
+ * switch_to(n) should switch tasks to task nr n, first
+ * checking that n isn't the current task, in which case it does nothing.
+ * The number of callee-saved registers saved on the kernel stack
+ * is defined here for use in copy_thread() and must agree with __switch_to().
+ */
+#endif /* !__ASSEMBLY__ */
+#define CALLEE_SAVED_FIRST_REG 30
+#define CALLEE_SAVED_REGS_COUNT 24   /* r30 to r52, plus an empty to align */
+#ifndef __ASSEMBLY__
+struct task_struct;
+#define switch_to(prev, next, last) ((last) = _switch_to((prev), (next)))
+extern struct task_struct *_switch_to(struct task_struct *prev,
+                                      struct task_struct *next);
+
+/* Helper function for _switch_to(). */
+extern struct task_struct *__switch_to(struct task_struct *prev,
+                                       struct task_struct *next,
+                                       unsigned long new_system_save_1_0);
+
+/* Address that switched-away from tasks are at. */
+extern unsigned long get_switch_to_pc(void);
+
+/*
+ * On SMP systems, when the scheduler does migration-cost autodetection,
+ * it needs a way to flush as much of the CPU's caches as possible:
+ *
+ * TODO: fill this in!
+ */
+static inline void sched_cacheflush(void)
+{
+}
+
+#define arch_align_stack(x) (x)
+
+/*
+ * Is the kernel doing fixups of unaligned accesses?  If <0, no kernel
+ * intervention occurs and SIGBUS is delivered with no data address
+ * info.  If 0, the kernel single-steps the instruction to discover
+ * the data address to provide with the SIGBUS.  If 1, the kernel does
+ * a fixup.
+ */
+extern int unaligned_fixup;
+
+/* Is the kernel printing on each unaligned fixup? */
+extern int unaligned_printk;
+
+/* Number of unaligned fixups performed */
+extern unsigned int unaligned_fixup_count;
+
+/* Init-time routine to do tile-specific per-cpu setup. */
+void setup_cpu(int boot);
+
+/* User-level DMA management functions */
+void grant_dma_mpls(void);
+void restrict_dma_mpls(void);
+
+#ifdef CONFIG_HARDWALL
+/* User-level network management functions */
+void reset_network_state(void);
+void grant_network_mpls(void);
+void restrict_network_mpls(void);
+int hardwall_deactivate(struct task_struct *task);
+
+/* Hook hardwall code into changes in affinity. */
+#define arch_set_cpus_allowed(p, new_mask) do { \
+        if (p->thread.hardwall && !cpumask_equal(&p->cpus_allowed, new_mask)) \
+                hardwall_deactivate(p); \
+} while (0)
+#endif
+
+/* Invoke the simulator "syscall" mechanism (see arch/tile/kernel/entry.S). */
+extern int _sim_syscall(int syscall_num, ...);
+#define sim_syscall(syscall_num, ...) \
+        _sim_syscall(SIM_CONTROL_SYSCALL + \
+                ((syscall_num) << _SIM_CONTROL_OPERATOR_BITS), \
+                ## __VA_ARGS__)
+
+/*
+ * Kernel threads can check to see if they need to migrate their
+ * stack whenever they return from a context switch; for user
+ * threads, we defer until they are returning to user-space.
+ */
+#define finish_arch_switch(prev) do {                                     \
+        if (unlikely((prev)->state == TASK_DEAD))                         \
+                __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_EXIT |       \
+                        ((prev)->pid << _SIM_CONTROL_OPERATOR_BITS));     \
+        __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_SWITCH |             \
+                (current->pid << _SIM_CONTROL_OPERATOR_BITS));            \
+        if (current->mm == NULL && !kstack_hash &&                        \
+            current_thread_info()->homecache_cpu != smp_processor_id())   \
+                homecache_migrate_kthread();                              \
+} while (0)
+
+/* Support function for forking a new task. */
+void ret_from_fork(void);
+
+/* Called from ret_from_fork() when a new process starts up. */
+struct task_struct *sim_notify_fork(struct task_struct *prev);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_SYSTEM_H */
diff --git a/arch/tile/include/asm/termbits.h b/arch/tile/include/asm/termbits.h
new file mode 100644
index 000000000000..3935b106de79
--- /dev/null
+++ b/arch/tile/include/asm/termbits.h
@@ -0,0 +1 @@
+#include <asm-generic/termbits.h>
diff --git a/arch/tile/include/asm/termios.h b/arch/tile/include/asm/termios.h
new file mode 100644
index 000000000000..280d78a9d966
--- /dev/null
+++ b/arch/tile/include/asm/termios.h
@@ -0,0 +1 @@
+#include <asm-generic/termios.h>
diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h
new file mode 100644
index 000000000000..3872f2b345d2
--- /dev/null
+++ b/arch/tile/include/asm/thread_info.h
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_THREAD_INFO_H
+#define _ASM_TILE_THREAD_INFO_H
+
+#include <asm/processor.h>
+#include <asm/page.h>
+#ifndef __ASSEMBLY__
+
+/*
+ * Low level task data that assembly code needs immediate access to.
+ * The structure is placed at the bottom of the supervisor stack.
+ */
+struct thread_info {
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        unsigned long           flags;          /* low level flags */
+        unsigned long           status;         /* thread-synchronous flags */
+        __u32                   homecache_cpu;  /* CPU we are homecached on */
+        __u32                   cpu;            /* current CPU */
+        int                     preempt_count;  /* 0 => preemptable,
+                                                   <0 => BUG */
+
+        mm_segment_t            addr_limit;     /* thread address space
+                                                   (KERNEL_DS or USER_DS) */
+        struct restart_block    restart_block;
+        struct single_step_state *step_state;   /* single step state
+                                                   (if non-zero) */
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure.
+ */
+#define INIT_THREAD_INFO(tsk)                   \
+{                                               \
+        .task           = &tsk,                 \
+        .exec_domain    = &default_exec_domain, \
+        .flags          = 0,                    \
+        .cpu            = 0,                    \
+        .preempt_count  = INIT_PREEMPT_COUNT,   \
+        .addr_limit     = KERNEL_DS,            \
+        .restart_block  = {                     \
+                .fn = do_no_restart_syscall,    \
+        },                                      \
+        .step_state     = NULL,                 \
+}
+
+#define init_thread_info        (init_thread_union.thread_info)
+#define init_stack              (init_thread_union.stack)
+
+#endif /* !__ASSEMBLY__ */
+
+#if PAGE_SIZE < 8192
+#define THREAD_SIZE_ORDER (13 - PAGE_SHIFT)
+#else
+#define THREAD_SIZE_ORDER (0)
+#endif
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define LOG2_THREAD_SIZE (PAGE_SHIFT + THREAD_SIZE_ORDER)
+
+#define STACK_WARN             (THREAD_SIZE/8)
+
+#ifndef __ASSEMBLY__
+
+/* How to get the thread information struct from C. */
+register unsigned long stack_pointer __asm__("sp");
+
+#define current_thread_info() \
+  ((struct thread_info *)(stack_pointer & -THREAD_SIZE))
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+extern struct thread_info *alloc_thread_info(struct task_struct *task);
+extern void free_thread_info(struct thread_info *info);
+
+/* Sit on a nap instruction until interrupted. */
+extern void smp_nap(void);
+
+/* Enable interrupts racelessly and nap forever: helper for cpu_idle(). */
+extern void _cpu_idle(void);
+
+/* Switch boot idle thread to a freshly-allocated stack and free old stack. */
+extern void cpu_idle_on_new_stack(struct thread_info *old_ti,
+                                  unsigned long new_sp,
+                                  unsigned long new_ss10);
+
+#else /* __ASSEMBLY__ */
+
+/* how to get the thread information struct from ASM */
+#ifdef __tilegx__
+#define GET_THREAD_INFO(reg) move reg, sp; mm reg, zero, LOG2_THREAD_SIZE, 63
+#else
+#define GET_THREAD_INFO(reg) mm reg, sp, zero, LOG2_THREAD_SIZE, 31
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE          0x10000000
+
+/*
+ * Thread information flags that various assembly files may need to access.
+ * Keep flags accessed frequently in low bits, particular since it makes
+ * it easier to build constants in assembly.
+ */
+#define TIF_SIGPENDING          0       /* signal pending */
+#define TIF_NEED_RESCHED        1       /* rescheduling necessary */
+#define TIF_SINGLESTEP          2       /* restore singlestep on return to
+                                           user mode */
+#define TIF_ASYNC_TLB           3       /* got an async TLB fault in kernel */
+#define TIF_SYSCALL_TRACE       4       /* syscall trace active */
+#define TIF_SYSCALL_AUDIT       5       /* syscall auditing active */
+#define TIF_SECCOMP             6       /* secure computing */
+#define TIF_MEMDIE              7       /* OOM killer at work */
+
+#define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
+#define _TIF_SINGLESTEP         (1<<TIF_SINGLESTEP)
+#define _TIF_ASYNC_TLB          (1<<TIF_ASYNC_TLB)
+#define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT      (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP            (1<<TIF_SECCOMP)
+#define _TIF_MEMDIE             (1<<TIF_MEMDIE)
+
+/* Work to do on any return to user space. */
+#define _TIF_ALLWORK_MASK \
+  (_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SINGLESTEP|_TIF_ASYNC_TLB)
+
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ */
+#ifdef __tilegx__
+#define TS_COMPAT               0x0001  /* 32-bit compatibility mode */
+#endif
+#define TS_POLLING              0x0004  /* in idle loop but not sleeping */
+#define TS_RESTORE_SIGMASK      0x0008  /* restore signal mask in do_signal */
+
+#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
+
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK        1
+static inline void set_restore_sigmask(void)
+{
+        struct thread_info *ti = current_thread_info();
+        ti->status |= TS_RESTORE_SIGMASK;
+        set_bit(TIF_SIGPENDING, &ti->flags);
+}
+#endif  /* !__ASSEMBLY__ */
+
+#endif /* _ASM_TILE_THREAD_INFO_H */
diff --git a/arch/tile/include/asm/timex.h b/arch/tile/include/asm/timex.h
new file mode 100644
index 000000000000..3baf5fc4c0a1
--- /dev/null
+++ b/arch/tile/include/asm/timex.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_TIMEX_H
+#define _ASM_TILE_TIMEX_H
+
+/*
+ * This rate should be a multiple of the possible HZ values (100, 250, 1000)
+ * and a fraction of the possible hardware timer frequencies.  Our timer
+ * frequency is highly tunable but also quite precise, so for the primary use
+ * of this value (setting ACT_HZ from HZ) we just pick a value that causes
+ * ACT_HZ to be set to HZ.  We make the value somewhat large just to be
+ * more robust in case someone tries out a new value of HZ.
+ */
+#define CLOCK_TICK_RATE 1000000
+
+typedef unsigned long long cycles_t;
+
+#if CHIP_HAS_SPLIT_CYCLE()
+cycles_t get_cycles(void);
+#else
+static inline cycles_t get_cycles(void)
+{
+        return __insn_mfspr(SPR_CYCLE);
+}
+#endif
+
+cycles_t get_clock_rate(void);
+
+/* Called at cpu initialization to set some low-level constants. */
+void setup_clock(void);
+
+/* Called at cpu initialization to start the tile-timer clock device. */
+void setup_tile_timer(void);
+
+#endif /* _ASM_TILE_TIMEX_H */
diff --git a/arch/tile/include/asm/tlb.h b/arch/tile/include/asm/tlb.h
new file mode 100644
index 000000000000..4a891a1a8df3
--- /dev/null
+++ b/arch/tile/include/asm/tlb.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_TLB_H
+#define _ASM_TILE_TLB_H
+
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#define tlb_end_vma(tlb, vma) do { } while (0)
+#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
+#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
+
+#include <asm-generic/tlb.h>
+
+#endif /* _ASM_TILE_TLB_H */
diff --git a/arch/tile/include/asm/tlbflush.h b/arch/tile/include/asm/tlbflush.h
new file mode 100644
index 000000000000..96199d214fb8
--- /dev/null
+++ b/arch/tile/include/asm/tlbflush.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_TLBFLUSH_H
+#define _ASM_TILE_TLBFLUSH_H
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <asm/cacheflush.h>
+#include <asm/page.h>
+#include <hv/hypervisor.h>
+
+/*
+ * Rather than associating each mm with its own ASID, we just use
+ * ASIDs to allow us to lazily flush the TLB when we switch mms.
+ * This way we only have to do an actual TLB flush on mm switch
+ * every time we wrap ASIDs, not every single time we switch.
+ *
+ * FIXME: We might improve performance by keeping ASIDs around
+ * properly, though since the hypervisor direct-maps VAs to TSB
+ * entries, we're likely to have lost at least the executable page
+ * mappings by the time we switch back to the original mm.
+ */
+DECLARE_PER_CPU(int, current_asid);
+
+/* The hypervisor tells us what ASIDs are available to us. */
+extern int min_asid, max_asid;
+
+static inline unsigned long hv_page_size(const struct vm_area_struct *vma)
+{
+        return (vma->vm_flags & VM_HUGETLB) ? HPAGE_SIZE : PAGE_SIZE;
+}
+
+/* Pass as vma pointer for non-executable mapping, if no vma available. */
+#define FLUSH_NONEXEC ((const struct vm_area_struct *)-1UL)
+
+/* Flush a single user page on this cpu. */
+static inline void local_flush_tlb_page(const struct vm_area_struct *vma,
+                                        unsigned long addr,
+                                        unsigned long page_size)
+{
+        int rc = hv_flush_page(addr, page_size);
+        if (rc < 0)
+                panic("hv_flush_page(%#lx,%#lx) failed: %d",
+                      addr, page_size, rc);
+        if (!vma || (vma != FLUSH_NONEXEC && (vma->vm_flags & VM_EXEC)))
+                __flush_icache();
+}
+
+/* Flush range of user pages on this cpu. */
+static inline void local_flush_tlb_pages(const struct vm_area_struct *vma,
+                                         unsigned long addr,
+                                         unsigned long page_size,
+                                         unsigned long len)
+{
+        int rc = hv_flush_pages(addr, page_size, len);
+        if (rc < 0)
+                panic("hv_flush_pages(%#lx,%#lx,%#lx) failed: %d",
+                      addr, page_size, len, rc);
+        if (!vma || (vma != FLUSH_NONEXEC && (vma->vm_flags & VM_EXEC)))
+                __flush_icache();
+}
+
+/* Flush all user pages on this cpu. */
+static inline void local_flush_tlb(void)
+{
+        int rc = hv_flush_all(1);   /* preserve global mappings */
+        if (rc < 0)
+                panic("hv_flush_all(1) failed: %d", rc);
+        __flush_icache();
+}
+
+/*
+ * Global pages have to be flushed a bit differently. Not a real
+ * performance problem because this does not happen often.
+ */
+static inline void local_flush_tlb_all(void)
+{
+        int i;
+        for (i = 0; ; ++i) {
+                HV_VirtAddrRange r = hv_inquire_virtual(i);
+                if (r.size == 0)
+                        break;
+                local_flush_tlb_pages(NULL, r.start, PAGE_SIZE, r.size);
+                local_flush_tlb_pages(NULL, r.start, HPAGE_SIZE, r.size);
+        }
+}
+
+/*
+ * TLB flushing:
+ *
+ *  - flush_tlb() flushes the current mm struct TLBs
+ *  - flush_tlb_all() flushes all processes TLBs
+ *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
+ *  - flush_tlb_page(vma, vmaddr) flushes one page
+ *  - flush_tlb_range(vma, start, end) flushes a range of pages
+ *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
+ *  - flush_tlb_others(cpumask, mm, va) flushes TLBs on other cpus
+ *
+ * Here (as in vm_area_struct), "end" means the first byte after
+ * our end address.
+ */
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void flush_tlb_current_task(void);
+extern void flush_tlb_mm(struct mm_struct *);
+extern void flush_tlb_page(const struct vm_area_struct *, unsigned long);
+extern void flush_tlb_page_mm(const struct vm_area_struct *,
+                              struct mm_struct *, unsigned long);
+extern void flush_tlb_range(const struct vm_area_struct *,
+                            unsigned long start, unsigned long end);
+
+#define flush_tlb()     flush_tlb_current_task()
+
+#endif /* _ASM_TILE_TLBFLUSH_H */
diff --git a/arch/tile/include/asm/topology.h b/arch/tile/include/asm/topology.h
new file mode 100644
index 000000000000..343172d422a9
--- /dev/null
+++ b/arch/tile/include/asm/topology.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_TOPOLOGY_H
+#define _ASM_TILE_TOPOLOGY_H
+
+#ifdef CONFIG_NUMA
+
+#include <linux/cpumask.h>
+
+/* Mappings between logical cpu number and node number. */
+extern struct cpumask node_2_cpu_mask[];
+extern char cpu_2_node[];
+
+/* Returns the number of the node containing CPU 'cpu'. */
+static inline int cpu_to_node(int cpu)
+{
+        return cpu_2_node[cpu];
+}
+
+/*
+ * Returns the number of the node containing Node 'node'.
+ * This architecture is flat, so it is a pretty simple function!
+ */
+#define parent_node(node) (node)
+
+/* Returns a bitmask of CPUs on Node 'node'. */
+static inline const struct cpumask *cpumask_of_node(int node)
+{
+        return &node_2_cpu_mask[node];
+}
+
+/* For now, use numa node -1 for global allocation. */
+#define pcibus_to_node(bus)             ((void)(bus), -1)
+
+/* sched_domains SD_NODE_INIT for TILE architecture */
+#define SD_NODE_INIT (struct sched_domain) {            \
+        .min_interval           = 8,                    \
+        .max_interval           = 32,                   \
+        .busy_factor            = 32,                   \
+        .imbalance_pct          = 125,                  \
+        .cache_nice_tries       = 1,                    \
+        .busy_idx               = 3,                    \
+        .idle_idx               = 1,                    \
+        .newidle_idx            = 2,                    \
+        .wake_idx               = 1,                    \
+        .flags                  = SD_LOAD_BALANCE       \
+                                | SD_BALANCE_NEWIDLE    \
+                                | SD_BALANCE_EXEC       \
+                                | SD_BALANCE_FORK       \
+                                | SD_WAKE_AFFINE        \
+                                | SD_SERIALIZE,         \
+        .last_balance           = jiffies,              \
+        .balance_interval       = 1,                    \
+}
+
+/* By definition, we create nodes based on online memory. */
+#define node_has_online_mem(nid) 1
+
+#endif /* CONFIG_NUMA */
+
+#include <asm-generic/topology.h>
+
+#ifdef CONFIG_SMP
+#define topology_physical_package_id(cpu)       ((void)(cpu), 0)
+#define topology_core_id(cpu)                   (cpu)
+#define topology_core_cpumask(cpu)              ((void)(cpu), cpu_online_mask)
+#define topology_thread_cpumask(cpu)            cpumask_of(cpu)
+
+/* indicates that pointers to the topology struct cpumask maps are valid */
+#define arch_provides_topology_pointers         yes
+#endif
+
+#endif /* _ASM_TILE_TOPOLOGY_H */
diff --git a/arch/tile/include/asm/traps.h b/arch/tile/include/asm/traps.h
new file mode 100644
index 000000000000..432a9c15c8a2
--- /dev/null
+++ b/arch/tile/include/asm/traps.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_TRAPS_H
+#define _ASM_TILE_TRAPS_H
+
+/* mm/fault.c */
+void do_page_fault(struct pt_regs *, int fault_num,
+                   unsigned long address, unsigned long write);
+void do_async_page_fault(struct pt_regs *);
+
+#ifndef __tilegx__
+/*
+ * We return this structure in registers to avoid having to write
+ * additional save/restore code in the intvec.S caller.
+ */
+struct intvec_state {
+        void *handler;
+        unsigned long vecnum;
+        unsigned long fault_num;
+        unsigned long info;
+        unsigned long retval;
+};
+struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num,
+                                      unsigned long address,
+                                      unsigned long info);
+#endif
+
+/* kernel/traps.c */
+void do_trap(struct pt_regs *, int fault_num, unsigned long reason);
+void kernel_double_fault(int dummy, ulong pc, ulong lr, ulong sp, ulong r52);
+
+/* kernel/time.c */
+void do_timer_interrupt(struct pt_regs *, int fault_num);
+
+/* kernel/messaging.c */
+void hv_message_intr(struct pt_regs *, int intnum);
+
+/* kernel/irq.c */
+void tile_dev_intr(struct pt_regs *, int intnum);
+
+#ifdef CONFIG_HARDWALL
+/* kernel/hardwall.c */
+void do_hardwall_trap(struct pt_regs *, int fault_num);
+#endif
+
+/* kernel/ptrace.c */
+void do_breakpoint(struct pt_regs *, int fault_num);
+
+
+#endif /* _ASM_TILE_SYSCALLS_H */
diff --git a/arch/tile/include/asm/types.h b/arch/tile/include/asm/types.h
new file mode 100644
index 000000000000..b9e79bc580dd
--- /dev/null
+++ b/arch/tile/include/asm/types.h
@@ -0,0 +1 @@
+#include <asm-generic/types.h>
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
new file mode 100644
index 000000000000..ef34d2caa5b1
--- /dev/null
+++ b/arch/tile/include/asm/uaccess.h
@@ -0,0 +1,580 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_UACCESS_H
+#define _ASM_TILE_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <asm-generic/uaccess-unaligned.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+
+#define VERIFY_READ     0
+#define VERIFY_WRITE    1
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not.  If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+#define MAKE_MM_SEG(a)  ((mm_segment_t) { (a) })
+
+#define KERNEL_DS       MAKE_MM_SEG(-1UL)
+#define USER_DS         MAKE_MM_SEG(PAGE_OFFSET)
+
+#define get_ds()        (KERNEL_DS)
+#define get_fs()        (current_thread_info()->addr_limit)
+#define set_fs(x)       (current_thread_info()->addr_limit = (x))
+
+#define segment_eq(a, b) ((a).seg == (b).seg)
+
+#ifndef __tilegx__
+/*
+ * We could allow mapping all 16 MB at 0xfc000000, but we set up a
+ * special hack in arch_setup_additional_pages() to auto-create a mapping
+ * for the first 16 KB, and it would seem strange to have different
+ * user-accessible semantics for memory at 0xfc000000 and above 0xfc004000.
+ */
+static inline int is_arch_mappable_range(unsigned long addr,
+                                         unsigned long size)
+{
+        return (addr >= MEM_USER_INTRPT &&
+                addr < (MEM_USER_INTRPT + INTRPT_SIZE) &&
+                size <= (MEM_USER_INTRPT + INTRPT_SIZE) - addr);
+}
+#define is_arch_mappable_range is_arch_mappable_range
+#else
+#define is_arch_mappable_range(addr, size) 0
+#endif
+
+/*
+ * Test whether a block of memory is a valid user space address.
+ * Returns 0 if the range is valid, nonzero otherwise.
+ */
+int __range_ok(unsigned long addr, unsigned long size);
+
+/**
+ * access_ok: - Checks if a user space pointer is valid
+ * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE.  Note that
+ *        %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
+ *        to write to a block, it is always safe to read from it.
+ * @addr: User space pointer to start of block to check
+ * @size: Size of block to check
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Checks if a pointer to a block of memory in user space is valid.
+ *
+ * Returns true (nonzero) if the memory block may be valid, false (zero)
+ * if it is definitely invalid.
+ *
+ * Note that, depending on architecture, this function probably just
+ * checks that the pointer is in the user space range - after calling
+ * this function, memory access functions may still return -EFAULT.
+ */
+#define access_ok(type, addr, size) ({ \
+        __chk_user_ptr(addr); \
+        likely(__range_ok((unsigned long)(addr), (size)) == 0); \
+})
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry {
+        unsigned long insn, fixup;
+};
+
+extern int fixup_exception(struct pt_regs *regs);
+
+/*
+ * We return the __get_user_N function results in a structure,
+ * thus in r0 and r1.  If "err" is zero, "val" is the result
+ * of the read; otherwise, "err" is -EFAULT.
+ *
+ * We rarely need 8-byte values on a 32-bit architecture, but
+ * we size the structure to accommodate.  In practice, for the
+ * the smaller reads, we can zero the high word for free, and
+ * the caller will ignore it by virtue of casting anyway.
+ */
+struct __get_user {
+        unsigned long long val;
+        int err;
+};
+
+/*
+ * FIXME: we should express these as inline extended assembler, since
+ * they're fundamentally just a variable dereference and some
+ * supporting exception_table gunk.  Note that (a la i386) we can
+ * extend the copy_to_user and copy_from_user routines to call into
+ * such extended assembler routines, though we will have to use a
+ * different return code in that case (1, 2, or 4, rather than -EFAULT).
+ */
+extern struct __get_user __get_user_1(const void __user *);
+extern struct __get_user __get_user_2(const void __user *);
+extern struct __get_user __get_user_4(const void __user *);
+extern struct __get_user __get_user_8(const void __user *);
+extern int __put_user_1(long, void __user *);
+extern int __put_user_2(long, void __user *);
+extern int __put_user_4(long, void __user *);
+extern int __put_user_8(long long, void __user *);
+
+/* Unimplemented routines to cause linker failures */
+extern struct __get_user __get_user_bad(void);
+extern int __put_user_bad(void);
+
+/*
+ * Careful: we have to cast the result to the type of the pointer
+ * for sign reasons.
+ */
+/**
+ * __get_user: - Get a simple variable from user space, with less checking.
+ * @x:   Variable to store result.
+ * @ptr: Source address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple variable from user space to kernel
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ * On error, the variable @x is set to zero.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ */
+#define __get_user(x, ptr)                                              \
+({      struct __get_user __ret;                                        \
+        __typeof__(*(ptr)) const __user *__gu_addr = (ptr);             \
+        __chk_user_ptr(__gu_addr);                                      \
+        switch (sizeof(*(__gu_addr))) {                                 \
+        case 1:                                                         \
+                __ret = __get_user_1(__gu_addr);                        \
+                break;                                                  \
+        case 2:                                                         \
+                __ret = __get_user_2(__gu_addr);                        \
+                break;                                                  \
+        case 4:                                                         \
+                __ret = __get_user_4(__gu_addr);                        \
+                break;                                                  \
+        case 8:                                                         \
+                __ret = __get_user_8(__gu_addr);                        \
+                break;                                                  \
+        default:                                                        \
+                __ret = __get_user_bad();                               \
+                break;                                                  \
+        }                                                               \
+        (x) = (__typeof__(*__gu_addr)) (__typeof__(*__gu_addr - *__gu_addr)) \
+          __ret.val;                                                    \
+        __ret.err;                                                      \
+})
+
+/**
+ * __put_user: - Write a simple value into user space, with less checking.
+ * @x:   Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ *
+ * Implementation note: The "case 8" logic of casting to the type of
+ * the result of subtracting the value from itself is basically a way
+ * of keeping all integer types the same, but casting any pointers to
+ * ptrdiff_t, i.e. also an integer type.  This way there are no
+ * questionable casts seen by the compiler on an ILP32 platform.
+ */
+#define __put_user(x, ptr)                                              \
+({                                                                      \
+        int __pu_err = 0;                                               \
+        __typeof__(*(ptr)) __user *__pu_addr = (ptr);                   \
+        typeof(*__pu_addr) __pu_val = (x);                              \
+        __chk_user_ptr(__pu_addr);                                      \
+        switch (sizeof(__pu_val)) {                                     \
+        case 1:                                                         \
+                __pu_err = __put_user_1((long)__pu_val, __pu_addr);     \
+                break;                                                  \
+        case 2:                                                         \
+                __pu_err = __put_user_2((long)__pu_val, __pu_addr);     \
+                break;                                                  \
+        case 4:                                                         \
+                __pu_err = __put_user_4((long)__pu_val, __pu_addr);     \
+                break;                                                  \
+        case 8:                                                         \
+                __pu_err =                                              \
+                  __put_user_8((__typeof__(__pu_val - __pu_val))__pu_val,\
+                        __pu_addr);                                     \
+                break;                                                  \
+        default:                                                        \
+                __pu_err = __put_user_bad();                            \
+                break;                                                  \
+        }                                                               \
+        __pu_err;                                                       \
+})
+
+/*
+ * The versions of get_user and put_user without initial underscores
+ * check the address of their arguments to make sure they are not
+ * in kernel space.
+ */
+#define put_user(x, ptr)                                                \
+({                                                                      \
+        __typeof__(*(ptr)) __user *__Pu_addr = (ptr);                   \
+        access_ok(VERIFY_WRITE, (__Pu_addr), sizeof(*(__Pu_addr))) ?    \
+                __put_user((x), (__Pu_addr)) :                          \
+                -EFAULT;                                                \
+})
+
+#define get_user(x, ptr)                                                \
+({                                                                      \
+        __typeof__(*(ptr)) const __user *__Gu_addr = (ptr);             \
+        access_ok(VERIFY_READ, (__Gu_addr), sizeof(*(__Gu_addr))) ?     \
+                __get_user((x), (__Gu_addr)) :                          \
+                ((x) = 0, -EFAULT);                                     \
+})
+
+/**
+ * __copy_to_user() - copy data into user space, with less checking.
+ * @to:   Destination address, in user space.
+ * @from: Source address, in kernel space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from kernel space to user space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ *
+ * An alternate version - __copy_to_user_inatomic() - is designed
+ * to be called from atomic context, typically bracketed by calls
+ * to pagefault_disable() and pagefault_enable().
+ */
+extern unsigned long __must_check __copy_to_user_inatomic(
+        void __user *to, const void *from, unsigned long n);
+
+static inline unsigned long __must_check
+__copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        might_fault();
+        return __copy_to_user_inatomic(to, from, n);
+}
+
+static inline unsigned long __must_check
+copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        if (access_ok(VERIFY_WRITE, to, n))
+                n = __copy_to_user(to, from, n);
+        return n;
+}
+
+/**
+ * __copy_from_user() - copy data from user space, with less checking.
+ * @to:   Destination address, in kernel space.
+ * @from: Source address, in user space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from user space to kernel space.  Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ *
+ * If some data could not be copied, this function will pad the copied
+ * data to the requested size using zero bytes.
+ *
+ * An alternate version - __copy_from_user_inatomic() - is designed
+ * to be called from atomic context, typically bracketed by calls
+ * to pagefault_disable() and pagefault_enable().  This version
+ * does *NOT* pad with zeros.
+ */
+extern unsigned long __must_check __copy_from_user_inatomic(
+        void *to, const void __user *from, unsigned long n);
+extern unsigned long __must_check __copy_from_user_zeroing(
+        void *to, const void __user *from, unsigned long n);
+
+static inline unsigned long __must_check
+__copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+       might_fault();
+       return __copy_from_user_zeroing(to, from, n);
+}
+
+static inline unsigned long __must_check
+_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        if (access_ok(VERIFY_READ, from, n))
+                n = __copy_from_user(to, from, n);
+        else
+                memset(to, 0, n);
+        return n;
+}
+
+#ifdef CONFIG_DEBUG_COPY_FROM_USER
+extern void copy_from_user_overflow(void)
+        __compiletime_warning("copy_from_user() size is not provably correct");
+
+static inline unsigned long __must_check copy_from_user(void *to,
+                                          const void __user *from,
+                                          unsigned long n)
+{
+        int sz = __compiletime_object_size(to);
+
+        if (likely(sz == -1 || sz >= n))
+                n = _copy_from_user(to, from, n);
+        else
+                copy_from_user_overflow();
+
+        return n;
+}
+#else
+#define copy_from_user _copy_from_user
+#endif
+
+#ifdef __tilegx__
+/**
+ * __copy_in_user() - copy data within user space, with less checking.
+ * @to:   Destination address, in user space.
+ * @from: Source address, in kernel space.
+ * @n:    Number of bytes to copy.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Copy data from user space to user space.  Caller must check
+ * the specified blocks with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be copied.
+ * On success, this will be zero.
+ */
+extern unsigned long __copy_in_user_inatomic(
+        void __user *to, const void __user *from, unsigned long n);
+
+static inline unsigned long __must_check
+__copy_in_user(void __user *to, const void __user *from, unsigned long n)
+{
+        might_sleep();
+        return __copy_in_user_inatomic(to, from, n);
+}
+
+static inline unsigned long __must_check
+copy_in_user(void __user *to, const void __user *from, unsigned long n)
+{
+        if (access_ok(VERIFY_WRITE, to, n) && access_ok(VERIFY_READ, from, n))
+                n = __copy_in_user(to, from, n);
+        return n;
+}
+#endif
+
+
+/**
+ * strlen_user: - Get the size of a string in user space.
+ * @str: The string to measure.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * On exception, returns 0.
+ *
+ * If there is a limit on the length of a valid string, you may wish to
+ * consider using strnlen_user() instead.
+ */
+extern long strnlen_user_asm(const char __user *str, long n);
+static inline long __must_check strnlen_user(const char __user *str, long n)
+{
+        might_fault();
+        return strnlen_user_asm(str, n);
+}
+#define strlen_user(str) strnlen_user(str, LONG_MAX)
+
+/**
+ * strncpy_from_user: - Copy a NUL terminated string from userspace, with less checking.
+ * @dst:   Destination address, in kernel space.  This buffer must be at
+ *         least @count bytes long.
+ * @src:   Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ * Caller must check the specified block with access_ok() before calling
+ * this function.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+extern long strncpy_from_user_asm(char *dst, const char __user *src, long);
+static inline long __must_check __strncpy_from_user(
+        char *dst, const char __user *src, long count)
+{
+        might_fault();
+        return strncpy_from_user_asm(dst, src, count);
+}
+static inline long __must_check strncpy_from_user(
+        char *dst, const char __user *src, long count)
+{
+        if (access_ok(VERIFY_READ, src, 1))
+                return __strncpy_from_user(dst, src, count);
+        return -EFAULT;
+}
+
+/**
+ * clear_user: - Zero a block of memory in user space.
+ * @mem:   Destination address, in user space.
+ * @len:   Number of bytes to zero.
+ *
+ * Zero a block of memory in user space.
+ *
+ * Returns number of bytes that could not be cleared.
+ * On success, this will be zero.
+ */
+extern unsigned long clear_user_asm(void __user *mem, unsigned long len);
+static inline unsigned long __must_check __clear_user(
+        void __user *mem, unsigned long len)
+{
+        might_fault();
+        return clear_user_asm(mem, len);
+}
+static inline unsigned long __must_check clear_user(
+        void __user *mem, unsigned long len)
+{
+        if (access_ok(VERIFY_WRITE, mem, len))
+                return __clear_user(mem, len);
+        return len;
+}
+
+/**
+ * flush_user: - Flush a block of memory in user space from cache.
+ * @mem:   Destination address, in user space.
+ * @len:   Number of bytes to flush.
+ *
+ * Returns number of bytes that could not be flushed.
+ * On success, this will be zero.
+ */
+extern unsigned long flush_user_asm(void __user *mem, unsigned long len);
+static inline unsigned long __must_check __flush_user(
+        void __user *mem, unsigned long len)
+{
+        int retval;
+
+        might_fault();
+        retval = flush_user_asm(mem, len);
+        mb_incoherent();
+        return retval;
+}
+
+static inline unsigned long __must_check flush_user(
+        void __user *mem, unsigned long len)
+{
+        if (access_ok(VERIFY_WRITE, mem, len))
+                return __flush_user(mem, len);
+        return len;
+}
+
+/**
+ * inv_user: - Invalidate a block of memory in user space from cache.
+ * @mem:   Destination address, in user space.
+ * @len:   Number of bytes to invalidate.
+ *
+ * Returns number of bytes that could not be invalidated.
+ * On success, this will be zero.
+ *
+ * Note that on Tile64, the "inv" operation is in fact a
+ * "flush and invalidate", so cache write-backs will occur prior
+ * to the cache being marked invalid.
+ */
+extern unsigned long inv_user_asm(void __user *mem, unsigned long len);
+static inline unsigned long __must_check __inv_user(
+        void __user *mem, unsigned long len)
+{
+        int retval;
+
+        might_fault();
+        retval = inv_user_asm(mem, len);
+        mb_incoherent();
+        return retval;
+}
+static inline unsigned long __must_check inv_user(
+        void __user *mem, unsigned long len)
+{
+        if (access_ok(VERIFY_WRITE, mem, len))
+                return __inv_user(mem, len);
+        return len;
+}
+
+/**
+ * finv_user: - Flush-inval a block of memory in user space from cache.
+ * @mem:   Destination address, in user space.
+ * @len:   Number of bytes to invalidate.
+ *
+ * Returns number of bytes that could not be flush-invalidated.
+ * On success, this will be zero.
+ */
+extern unsigned long finv_user_asm(void __user *mem, unsigned long len);
+static inline unsigned long __must_check __finv_user(
+        void __user *mem, unsigned long len)
+{
+        int retval;
+
+        might_fault();
+        retval = finv_user_asm(mem, len);
+        mb_incoherent();
+        return retval;
+}
+static inline unsigned long __must_check finv_user(
+        void __user *mem, unsigned long len)
+{
+        if (access_ok(VERIFY_WRITE, mem, len))
+                return __finv_user(mem, len);
+        return len;
+}
+
+#endif /* _ASM_TILE_UACCESS_H */
diff --git a/arch/tile/include/asm/ucontext.h b/arch/tile/include/asm/ucontext.h
new file mode 100644
index 000000000000..9bc07b9f30fb
--- /dev/null
+++ b/arch/tile/include/asm/ucontext.h
@@ -0,0 +1 @@
+#include <asm-generic/ucontext.h>
diff --git a/arch/tile/include/asm/unaligned.h b/arch/tile/include/asm/unaligned.h
new file mode 100644
index 000000000000..137e2de5b102
--- /dev/null
+++ b/arch/tile/include/asm/unaligned.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_UNALIGNED_H
+#define _ASM_TILE_UNALIGNED_H
+
+#include <linux/unaligned/le_struct.h>
+#include <linux/unaligned/be_byteshift.h>
+#include <linux/unaligned/generic.h>
+#define get_unaligned   __get_unaligned_le
+#define put_unaligned   __put_unaligned_le
+
+#endif /* _ASM_TILE_UNALIGNED_H */
diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h
new file mode 100644
index 000000000000..f2e3ff485333
--- /dev/null
+++ b/arch/tile/include/asm/unistd.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#if !defined(_ASM_TILE_UNISTD_H) || defined(__SYSCALL)
+#define _ASM_TILE_UNISTD_H
+
+#ifndef __LP64__
+/* Use the flavor of this syscall that matches the 32-bit API better. */
+#define __ARCH_WANT_SYNC_FILE_RANGE2
+#endif
+
+/* Use the standard ABI for syscalls. */
+#include <asm-generic/unistd.h>
+
+/* Additional Tilera-specific syscalls. */
+#define __NR_flush_cache        (__NR_arch_specific_syscall + 1)
+__SYSCALL(__NR_flush_cache, sys_flush_cache)
+
+#ifndef __tilegx__
+/* "Fast" syscalls provide atomic support for 32-bit chips. */
+#define __NR_FAST_cmpxchg       -1
+#define __NR_FAST_atomic_update -2
+#define __NR_FAST_cmpxchg64     -3
+#define __NR_cmpxchg_badaddr    (__NR_arch_specific_syscall + 0)
+__SYSCALL(__NR_cmpxchg_badaddr, sys_cmpxchg_badaddr)
+#endif
+
+#ifdef __KERNEL__
+/* In compat mode, we use sys_llseek() for compat_sys_llseek(). */
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_SYS_LLSEEK
+#endif
+#endif
+
+#endif /* _ASM_TILE_UNISTD_H */
diff --git a/arch/tile/include/asm/user.h b/arch/tile/include/asm/user.h
new file mode 100644
index 000000000000..cbc8b4d5a5ce
--- /dev/null
+++ b/arch/tile/include/asm/user.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ */
+
+#ifndef _ASM_TILE_USER_H
+#define _ASM_TILE_USER_H
+
+/* This header is for a.out file formats, which TILE does not support. */
+
+#endif /* _ASM_TILE_USER_H */
diff --git a/arch/tile/include/asm/xor.h b/arch/tile/include/asm/xor.h
new file mode 100644
index 000000000000..c82eb12a5b18
--- /dev/null
+++ b/arch/tile/include/asm/xor.h
@@ -0,0 +1 @@
+#include <asm-generic/xor.h>
diff --git a/arch/tile/include/hv/drv_pcie_rc_intf.h b/arch/tile/include/hv/drv_pcie_rc_intf.h
new file mode 100644
index 000000000000..9bd2243bece0
--- /dev/null
+++ b/arch/tile/include/hv/drv_pcie_rc_intf.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file drv_pcie_rc_intf.h
+ * Interface definitions for the PCIE Root Complex.
+ */
+
+#ifndef _SYS_HV_DRV_PCIE_RC_INTF_H
+#define _SYS_HV_DRV_PCIE_RC_INTF_H
+
+/** File offset for reading the interrupt base number used for PCIE legacy
+    interrupts and PLX Gen 1 requirement flag */
+#define PCIE_RC_CONFIG_MASK_OFF 0
+
+
+/**
+ * Structure used for obtaining PCIe config information, read from the PCIE
+ * subsystem /ctl file at initialization
+ */
+typedef struct pcie_rc_config
+{
+  int intr;                     /**< interrupt number used for downcall */
+  int plx_gen1;                 /**< flag for PLX Gen 1 configuration */
+} pcie_rc_config_t;
+
+#endif  /* _SYS_HV_DRV_PCIE_RC_INTF_H */
diff --git a/arch/tile/include/hv/hypervisor.h b/arch/tile/include/hv/hypervisor.h
new file mode 100644
index 000000000000..9bd303a141b2
--- /dev/null
+++ b/arch/tile/include/hv/hypervisor.h
@@ -0,0 +1,2375 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file hypervisor.h
+ * The hypervisor's public API.
+ */
+
+#ifndef _TILE_HV_H
+#define _TILE_HV_H
+
+#include <arch/chip.h>
+
+#include <hv/pagesize.h>
+
+/* Linux builds want unsigned long constants, but assembler wants numbers */
+#ifdef __ASSEMBLER__
+/** One, for assembler */
+#define __HV_SIZE_ONE 1
+#elif !defined(__tile__) && CHIP_VA_WIDTH() > 32
+/** One, for 64-bit on host */
+#define __HV_SIZE_ONE 1ULL
+#else
+/** One, for Linux */
+#define __HV_SIZE_ONE 1UL
+#endif
+
+/** The log2 of the span of a level-1 page table, in bytes.
+ */
+#define HV_LOG2_L1_SPAN 32
+
+/** The span of a level-1 page table, in bytes.
+ */
+#define HV_L1_SPAN (__HV_SIZE_ONE << HV_LOG2_L1_SPAN)
+
+/** The size of small pages, in bytes. This value should be verified
+ * at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL).
+ */
+#define HV_PAGE_SIZE_SMALL (__HV_SIZE_ONE << HV_LOG2_PAGE_SIZE_SMALL)
+
+/** The size of large pages, in bytes. This value should be verified
+ * at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE).
+ */
+#define HV_PAGE_SIZE_LARGE (__HV_SIZE_ONE << HV_LOG2_PAGE_SIZE_LARGE)
+
+/** The log2 of the granularity at which page tables must be aligned;
+ *  in other words, the CPA for a page table must have this many zero
+ *  bits at the bottom of the address.
+ */
+#define HV_LOG2_PAGE_TABLE_ALIGN 11
+
+/** The granularity at which page tables must be aligned.
+ */
+#define HV_PAGE_TABLE_ALIGN (__HV_SIZE_ONE << HV_LOG2_PAGE_TABLE_ALIGN)
+
+/** Normal start of hypervisor glue in client physical memory. */
+#define HV_GLUE_START_CPA 0x10000
+
+/** This much space is reserved at HV_GLUE_START_CPA
+ * for the hypervisor glue. The client program must start at
+ * some address higher than this, and in particular the address of
+ * its text section should be equal to zero modulo HV_PAGE_SIZE_LARGE
+ * so that relative offsets to the HV glue are correct.
+ */
+#define HV_GLUE_RESERVED_SIZE 0x10000
+
+/** Each entry in the hv dispatch array takes this many bytes. */
+#define HV_DISPATCH_ENTRY_SIZE 32
+
+/** Version of the hypervisor interface defined by this file */
+#define _HV_VERSION 11
+
+/* Index into hypervisor interface dispatch code blocks.
+ *
+ * Hypervisor calls are invoked from user space by calling code
+ * at an address HV_BASE_ADDRESS + (index) * HV_DISPATCH_ENTRY_SIZE,
+ * where index is one of these enum values.
+ *
+ * Normally a supervisor is expected to produce a set of symbols
+ * starting at HV_BASE_ADDRESS that obey this convention, but a user
+ * program could call directly through function pointers if desired.
+ *
+ * These numbers are part of the binary API and will not be changed
+ * without updating HV_VERSION, which should be a rare event.
+ */
+
+/** reserved. */
+#define _HV_DISPATCH_RESERVED                     0
+
+/** hv_init  */
+#define HV_DISPATCH_INIT                          1
+
+/** hv_install_context */
+#define HV_DISPATCH_INSTALL_CONTEXT               2
+
+/** hv_sysconf */
+#define HV_DISPATCH_SYSCONF                       3
+
+/** hv_get_rtc */
+#define HV_DISPATCH_GET_RTC                       4
+
+/** hv_set_rtc */
+#define HV_DISPATCH_SET_RTC                       5
+
+/** hv_flush_asid */
+#define HV_DISPATCH_FLUSH_ASID                    6
+
+/** hv_flush_page */
+#define HV_DISPATCH_FLUSH_PAGE                    7
+
+/** hv_flush_pages */
+#define HV_DISPATCH_FLUSH_PAGES                   8
+
+/** hv_restart */
+#define HV_DISPATCH_RESTART                       9
+
+/** hv_halt */
+#define HV_DISPATCH_HALT                          10
+
+/** hv_power_off */
+#define HV_DISPATCH_POWER_OFF                     11
+
+/** hv_inquire_physical */
+#define HV_DISPATCH_INQUIRE_PHYSICAL              12
+
+/** hv_inquire_memory_controller */
+#define HV_DISPATCH_INQUIRE_MEMORY_CONTROLLER     13
+
+/** hv_inquire_virtual */
+#define HV_DISPATCH_INQUIRE_VIRTUAL               14
+
+/** hv_inquire_asid */
+#define HV_DISPATCH_INQUIRE_ASID                  15
+
+/** hv_nanosleep */
+#define HV_DISPATCH_NANOSLEEP                     16
+
+/** hv_console_read_if_ready */
+#define HV_DISPATCH_CONSOLE_READ_IF_READY         17
+
+/** hv_console_write */
+#define HV_DISPATCH_CONSOLE_WRITE                 18
+
+/** hv_downcall_dispatch */
+#define HV_DISPATCH_DOWNCALL_DISPATCH             19
+
+/** hv_inquire_topology */
+#define HV_DISPATCH_INQUIRE_TOPOLOGY              20
+
+/** hv_fs_findfile */
+#define HV_DISPATCH_FS_FINDFILE                   21
+
+/** hv_fs_fstat */
+#define HV_DISPATCH_FS_FSTAT                      22
+
+/** hv_fs_pread */
+#define HV_DISPATCH_FS_PREAD                      23
+
+/** hv_physaddr_read64 */
+#define HV_DISPATCH_PHYSADDR_READ64               24
+
+/** hv_physaddr_write64 */
+#define HV_DISPATCH_PHYSADDR_WRITE64              25
+
+/** hv_get_command_line */
+#define HV_DISPATCH_GET_COMMAND_LINE              26
+
+/** hv_set_caching */
+#define HV_DISPATCH_SET_CACHING                   27
+
+/** hv_bzero_page */
+#define HV_DISPATCH_BZERO_PAGE                    28
+
+/** hv_register_message_state */
+#define HV_DISPATCH_REGISTER_MESSAGE_STATE        29
+
+/** hv_send_message */
+#define HV_DISPATCH_SEND_MESSAGE                  30
+
+/** hv_receive_message */
+#define HV_DISPATCH_RECEIVE_MESSAGE               31
+
+/** hv_inquire_context */
+#define HV_DISPATCH_INQUIRE_CONTEXT               32
+
+/** hv_start_all_tiles */
+#define HV_DISPATCH_START_ALL_TILES               33
+
+/** hv_dev_open */
+#define HV_DISPATCH_DEV_OPEN                      34
+
+/** hv_dev_close */
+#define HV_DISPATCH_DEV_CLOSE                     35
+
+/** hv_dev_pread */
+#define HV_DISPATCH_DEV_PREAD                     36
+
+/** hv_dev_pwrite */
+#define HV_DISPATCH_DEV_PWRITE                    37
+
+/** hv_dev_poll */
+#define HV_DISPATCH_DEV_POLL                      38
+
+/** hv_dev_poll_cancel */
+#define HV_DISPATCH_DEV_POLL_CANCEL               39
+
+/** hv_dev_preada */
+#define HV_DISPATCH_DEV_PREADA                    40
+
+/** hv_dev_pwritea */
+#define HV_DISPATCH_DEV_PWRITEA                   41
+
+/** hv_flush_remote */
+#define HV_DISPATCH_FLUSH_REMOTE                  42
+
+/** hv_console_putc */
+#define HV_DISPATCH_CONSOLE_PUTC                  43
+
+/** hv_inquire_tiles */
+#define HV_DISPATCH_INQUIRE_TILES                 44
+
+/** hv_confstr */
+#define HV_DISPATCH_CONFSTR                       45
+
+/** hv_reexec */
+#define HV_DISPATCH_REEXEC                        46
+
+/** hv_set_command_line */
+#define HV_DISPATCH_SET_COMMAND_LINE              47
+
+#if !CHIP_HAS_IPI()
+
+/** hv_clear_intr */
+#define HV_DISPATCH_CLEAR_INTR                    48
+
+/** hv_enable_intr */
+#define HV_DISPATCH_ENABLE_INTR                   49
+
+/** hv_disable_intr */
+#define HV_DISPATCH_DISABLE_INTR                  50
+
+/** hv_raise_intr */
+#define HV_DISPATCH_RAISE_INTR                    51
+
+/** hv_trigger_ipi */
+#define HV_DISPATCH_TRIGGER_IPI                   52
+
+#endif /* !CHIP_HAS_IPI() */
+
+/** hv_store_mapping */
+#define HV_DISPATCH_STORE_MAPPING                 53
+
+/** hv_inquire_realpa */
+#define HV_DISPATCH_INQUIRE_REALPA                54
+
+/** hv_flush_all */
+#define HV_DISPATCH_FLUSH_ALL                     55
+
+#if CHIP_HAS_IPI()
+/** hv_get_ipi_pte */
+#define HV_DISPATCH_GET_IPI_PTE                   56
+#endif
+
+/** One more than the largest dispatch value */
+#define _HV_DISPATCH_END                          57
+
+
+#ifndef __ASSEMBLER__
+
+#ifdef __KERNEL__
+#include <asm/types.h>
+typedef u32 __hv32;        /**< 32-bit value */
+typedef u64 __hv64;        /**< 64-bit value */
+#else
+#include <stdint.h>
+typedef uint32_t __hv32;   /**< 32-bit value */
+typedef uint64_t __hv64;   /**< 64-bit value */
+#endif
+
+
+/** Hypervisor physical address. */
+typedef __hv64 HV_PhysAddr;
+
+#if CHIP_VA_WIDTH() > 32
+/** Hypervisor virtual address. */
+typedef __hv64 HV_VirtAddr;
+#else
+/** Hypervisor virtual address. */
+typedef __hv32 HV_VirtAddr;
+#endif /* CHIP_VA_WIDTH() > 32 */
+
+/** Hypervisor ASID. */
+typedef unsigned int HV_ASID;
+
+/** Hypervisor tile location for a memory access
+ * ("location overridden target").
+ */
+typedef unsigned int HV_LOTAR;
+
+/** Hypervisor size of a page. */
+typedef unsigned long HV_PageSize;
+
+/** A page table entry.
+ */
+typedef struct
+{
+  __hv64 val;                /**< Value of PTE */
+} HV_PTE;
+
+/** Hypervisor error code. */
+typedef int HV_Errno;
+
+#endif /* !__ASSEMBLER__ */
+
+#define HV_OK           0    /**< No error */
+#define HV_EINVAL      -801  /**< Invalid argument */
+#define HV_ENODEV      -802  /**< No such device */
+#define HV_ENOENT      -803  /**< No such file or directory */
+#define HV_EBADF       -804  /**< Bad file number */
+#define HV_EFAULT      -805  /**< Bad address */
+#define HV_ERECIP      -806  /**< Bad recipients */
+#define HV_E2BIG       -807  /**< Message too big */
+#define HV_ENOTSUP     -808  /**< Service not supported */
+#define HV_EBUSY       -809  /**< Device busy */
+#define HV_ENOSYS      -810  /**< Invalid syscall */
+#define HV_EPERM       -811  /**< No permission */
+#define HV_ENOTREADY   -812  /**< Device not ready */
+#define HV_EIO         -813  /**< I/O error */
+#define HV_ENOMEM      -814  /**< Out of memory */
+
+#define HV_ERR_MAX     -801  /**< Largest HV error code */
+#define HV_ERR_MIN     -814  /**< Smallest HV error code */
+
+#ifndef __ASSEMBLER__
+
+/** Pass HV_VERSION to hv_init to request this version of the interface. */
+typedef enum { HV_VERSION = _HV_VERSION } HV_VersionNumber;
+
+/** Initializes the hypervisor.
+ *
+ * @param interface_version_number The version of the hypervisor interface
+ * that this program expects, typically HV_VERSION.
+ * @param chip_num Architecture number of the chip the client was built for.
+ * @param chip_rev_num Revision number of the chip the client was built for.
+ */
+void hv_init(HV_VersionNumber interface_version_number,
+             int chip_num, int chip_rev_num);
+
+
+/** Queries we can make for hv_sysconf().
+ *
+ * These numbers are part of the binary API and guaranteed not to change.
+ */
+typedef enum {
+  /** An invalid value; do not use. */
+  _HV_SYSCONF_RESERVED       = 0,
+
+  /** The length of the glue section containing the hv_ procs, in bytes. */
+  HV_SYSCONF_GLUE_SIZE       = 1,
+
+  /** The size of small pages, in bytes. */
+  HV_SYSCONF_PAGE_SIZE_SMALL = 2,
+
+  /** The size of large pages, in bytes. */
+  HV_SYSCONF_PAGE_SIZE_LARGE = 3,
+
+  /** Processor clock speed, in hertz. */
+  HV_SYSCONF_CPU_SPEED       = 4,
+
+  /** Processor temperature, in degrees Kelvin.  The value
+   *  HV_SYSCONF_TEMP_KTOC may be subtracted from this to get degrees
+   *  Celsius.  If that Celsius value is HV_SYSCONF_OVERTEMP, this indicates
+   *  that the temperature has hit an upper limit and is no longer being
+   *  accurately tracked.
+   */
+  HV_SYSCONF_CPU_TEMP        = 5,
+
+  /** Board temperature, in degrees Kelvin.  The value
+   *  HV_SYSCONF_TEMP_KTOC may be subtracted from this to get degrees
+   *  Celsius.  If that Celsius value is HV_SYSCONF_OVERTEMP, this indicates
+   *  that the temperature has hit an upper limit and is no longer being
+   *  accurately tracked.
+   */
+  HV_SYSCONF_BOARD_TEMP      = 6
+
+} HV_SysconfQuery;
+
+/** Offset to subtract from returned Kelvin temperature to get degrees
+    Celsius. */
+#define HV_SYSCONF_TEMP_KTOC 273
+
+/** Pseudo-temperature value indicating that the temperature has
+ *  pegged at its upper limit and is no longer accurate; note that this is
+ *  the value after subtracting HV_SYSCONF_TEMP_KTOC. */
+#define HV_SYSCONF_OVERTEMP 999
+
+/** Query a configuration value from the hypervisor.
+ * @param query Which value is requested (HV_SYSCONF_xxx).
+ * @return The requested value, or -1 the requested value is illegal or
+ *         unavailable.
+ */
+long hv_sysconf(HV_SysconfQuery query);
+
+
+/** Queries we can make for hv_confstr().
+ *
+ * These numbers are part of the binary API and guaranteed not to change.
+ */
+typedef enum {
+  /** An invalid value; do not use. */
+  _HV_CONFSTR_RESERVED        = 0,
+
+  /** Board part number. */
+  HV_CONFSTR_BOARD_PART_NUM   = 1,
+
+  /** Board serial number. */
+  HV_CONFSTR_BOARD_SERIAL_NUM = 2,
+
+  /** Chip serial number. */
+  HV_CONFSTR_CHIP_SERIAL_NUM  = 3,
+
+  /** Board revision level. */
+  HV_CONFSTR_BOARD_REV        = 4,
+
+  /** Hypervisor software version. */
+  HV_CONFSTR_HV_SW_VER        = 5,
+
+  /** The name for this chip model. */
+  HV_CONFSTR_CHIP_MODEL       = 6,
+
+  /** Human-readable board description. */
+  HV_CONFSTR_BOARD_DESC       = 7,
+
+  /** Human-readable description of the hypervisor configuration. */
+  HV_CONFSTR_HV_CONFIG        = 8,
+
+  /** Human-readable version string for the boot image (for instance,
+   *  who built it and when, what configuration file was used). */
+  HV_CONFSTR_HV_CONFIG_VER    = 9,
+
+  /** Mezzanine part number. */
+  HV_CONFSTR_MEZZ_PART_NUM   = 10,
+
+  /** Mezzanine serial number. */
+  HV_CONFSTR_MEZZ_SERIAL_NUM = 11,
+
+  /** Mezzanine revision level. */
+  HV_CONFSTR_MEZZ_REV        = 12,
+
+  /** Human-readable mezzanine description. */
+  HV_CONFSTR_MEZZ_DESC       = 13,
+
+  /** Control path for the onboard network switch. */
+  HV_CONFSTR_SWITCH_CONTROL  = 14,
+
+  /** Chip revision level. */
+  HV_CONFSTR_CHIP_REV        = 15
+
+} HV_ConfstrQuery;
+
+/** Query a configuration string from the hypervisor.
+ *
+ * @param query Identifier for the specific string to be retrieved
+ *        (HV_CONFSTR_xxx).
+ * @param buf Buffer in which to place the string.
+ * @param len Length of the buffer.
+ * @return If query is valid, then the length of the corresponding string,
+ *        including the trailing null; if this is greater than len, the string
+ *        was truncated.  If query is invalid, HV_EINVAL.  If the specified
+ *        buffer is not writable by the client, HV_EFAULT.
+ */
+int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len);
+
+/** Tile coordinate */
+typedef struct
+{
+  /** X coordinate, relative to supervisor's top-left coordinate */
+  int x;
+
+  /** Y coordinate, relative to supervisor's top-left coordinate */
+  int y;
+} HV_Coord;
+
+
+#if CHIP_HAS_IPI()
+
+/** Get the PTE for sending an IPI to a particular tile.
+ *
+ * @param tile Tile which will receive the IPI.
+ * @param pl Indicates which IPI registers: 0 = IPI_0, 1 = IPI_1.
+ * @param pte Filled with resulting PTE.
+ * @result Zero if no error, non-zero for invalid parameters.
+ */
+int hv_get_ipi_pte(HV_Coord tile, int pl, HV_PTE* pte);
+
+#else /* !CHIP_HAS_IPI() */
+
+/** A set of interrupts. */
+typedef __hv32 HV_IntrMask;
+
+/** The low interrupt numbers are reserved for use by the client in
+ *  delivering IPIs.  Any interrupt numbers higher than this value are
+ *  reserved for use by HV device drivers. */
+#define HV_MAX_IPI_INTERRUPT 7
+
+/** Enable a set of device interrupts.
+ *
+ * @param enab_mask Bitmap of interrupts to enable.
+ */
+void hv_enable_intr(HV_IntrMask enab_mask);
+
+/** Disable a set of device interrupts.
+ *
+ * @param disab_mask Bitmap of interrupts to disable.
+ */
+void hv_disable_intr(HV_IntrMask disab_mask);
+
+/** Clear a set of device interrupts.
+ *
+ * @param clear_mask Bitmap of interrupts to clear.
+ */
+void hv_clear_intr(HV_IntrMask clear_mask);
+
+/** Raise a set of device interrupts.
+ *
+ * @param raise_mask Bitmap of interrupts to raise.
+ */
+void hv_raise_intr(HV_IntrMask raise_mask);
+
+/** Trigger a one-shot interrupt on some tile
+ *
+ * @param tile Which tile to interrupt.
+ * @param interrupt Interrupt number to trigger; must be between 0 and
+ *        HV_MAX_IPI_INTERRUPT.
+ * @return HV_OK on success, or a hypervisor error code.
+ */
+HV_Errno hv_trigger_ipi(HV_Coord tile, int interrupt);
+
+#endif /* !CHIP_HAS_IPI() */
+
+/** Store memory mapping in debug memory so that external debugger can read it.
+ * A maximum of 16 entries can be stored.
+ *
+ * @param va VA of memory that is mapped.
+ * @param len Length of mapped memory.
+ * @param pa PA of memory that is mapped.
+ * @return 0 on success, -1 if the maximum number of mappings is exceeded.
+ */
+int hv_store_mapping(HV_VirtAddr va, unsigned int len, HV_PhysAddr pa);
+
+/** Given a client PA and a length, return its real (HV) PA.
+ *
+ * @param cpa Client physical address.
+ * @param len Length of mapped memory.
+ * @return physical address, or -1 if cpa or len is not valid.
+ */
+HV_PhysAddr hv_inquire_realpa(HV_PhysAddr cpa, unsigned int len);
+
+/** RTC return flag for no RTC chip present.
+ */
+#define HV_RTC_NO_CHIP     0x1
+
+/** RTC return flag for low-voltage condition, indicating that battery had
+ * died and time read is unreliable.
+ */
+#define HV_RTC_LOW_VOLTAGE 0x2
+
+/** Date/Time of day */
+typedef struct {
+#if CHIP_WORD_SIZE() > 32
+  __hv64 tm_sec;   /**< Seconds, 0-59 */
+  __hv64 tm_min;   /**< Minutes, 0-59 */
+  __hv64 tm_hour;  /**< Hours, 0-23 */
+  __hv64 tm_mday;  /**< Day of month, 0-30 */
+  __hv64 tm_mon;   /**< Month, 0-11 */
+  __hv64 tm_year;  /**< Years since 1900, 0-199 */
+  __hv64 flags;    /**< Return flags, 0 if no error */
+#else
+  __hv32 tm_sec;   /**< Seconds, 0-59 */
+  __hv32 tm_min;   /**< Minutes, 0-59 */
+  __hv32 tm_hour;  /**< Hours, 0-23 */
+  __hv32 tm_mday;  /**< Day of month, 0-30 */
+  __hv32 tm_mon;   /**< Month, 0-11 */
+  __hv32 tm_year;  /**< Years since 1900, 0-199 */
+  __hv32 flags;    /**< Return flags, 0 if no error */
+#endif
+} HV_RTCTime;
+
+/** Read the current time-of-day clock.
+ * @return HV_RTCTime of current time (GMT).
+ */
+HV_RTCTime hv_get_rtc(void);
+
+
+/** Set the current time-of-day clock.
+ * @param time time to reset time-of-day to (GMT).
+ */
+void hv_set_rtc(HV_RTCTime time);
+
+/** Installs a context, comprising a page table and other attributes.
+ *
+ *  Once this service completes, page_table will be used to translate
+ *  subsequent virtual address references to physical memory.
+ *
+ *  Installing a context does not cause an implicit TLB flush.  Before
+ *  reusing an ASID value for a different address space, the client is
+ *  expected to flush old references from the TLB with hv_flush_asid().
+ *  (Alternately, hv_flush_all() may be used to flush many ASIDs at once.)
+ *  After invalidating a page table entry, changing its attributes, or
+ *  changing its target CPA, the client is expected to flush old references
+ *  from the TLB with hv_flush_page() or hv_flush_pages(). Making a
+ *  previously invalid page valid does not require a flush.
+ *
+ *  Specifying an invalid ASID, or an invalid CPA (client physical address)
+ *  (either as page_table_pointer, or within the referenced table),
+ *  or another page table data item documented as above as illegal may
+ *  lead to client termination; since the validation of the table is
+ *  done as needed, this may happen before the service returns, or at
+ *  some later time, or never, depending upon the client's pattern of
+ *  memory references.  Page table entries which supply translations for
+ *  invalid virtual addresses may result in client termination, or may
+ *  be silently ignored.  "Invalid" in this context means a value which
+ *  was not provided to the client via the appropriate hv_inquire_* routine.
+ *
+ *  To support changing the instruction VAs at the same time as
+ *  installing the new page table, this call explicitly supports
+ *  setting the "lr" register to a different address and then jumping
+ *  directly to the hv_install_context() routine.  In this case, the
+ *  new page table does not need to contain any mapping for the
+ *  hv_install_context address itself.
+ *
+ * @param page_table Root of the page table.
+ * @param access PTE providing info on how to read the page table.  This
+ *   value must be consistent between multiple tiles sharing a page table,
+ *   and must also be consistent with any virtual mappings the client
+ *   may be using to access the page table.
+ * @param asid HV_ASID the page table is to be used for.
+ * @param flags Context flags, denoting attributes or privileges of the
+ *   current context (HV_CTX_xxx).
+ * @return Zero on success, or a hypervisor error code on failure.
+ */
+int hv_install_context(HV_PhysAddr page_table, HV_PTE access, HV_ASID asid,
+                       __hv32 flags);
+
+#endif /* !__ASSEMBLER__ */
+
+#define HV_CTX_DIRECTIO     0x1   /**< Direct I/O requests are accepted from
+                                       PL0. */
+
+#ifndef __ASSEMBLER__
+
+/** Value returned from hv_inquire_context(). */
+typedef struct
+{
+  /** Physical address of page table */
+  HV_PhysAddr page_table;
+
+  /** PTE which defines access method for top of page table */
+  HV_PTE access;
+
+  /** ASID associated with this page table */
+  HV_ASID asid;
+
+  /** Context flags */
+  __hv32 flags;
+} HV_Context;
+
+/** Retrieve information about the currently installed context.
+ * @return The data passed to the last successful hv_install_context call.
+ */
+HV_Context hv_inquire_context(void);
+
+
+/** Flushes all translations associated with the named address space
+ *  identifier from the TLB and any other hypervisor data structures.
+ *  Translations installed with the "global" bit are not flushed.
+ *
+ *  Specifying an invalid ASID may lead to client termination.  "Invalid"
+ *  in this context means a value which was not provided to the client
+ *  via <tt>hv_inquire_asid()</tt>.
+ *
+ * @param asid HV_ASID whose entries are to be flushed.
+ * @return Zero on success, or a hypervisor error code on failure.
+*/
+int hv_flush_asid(HV_ASID asid);
+
+
+/** Flushes all translations associated with the named virtual address
+ *  and page size from the TLB and other hypervisor data structures. Only
+ *  pages visible to the current ASID are affected; note that this includes
+ *  global pages in addition to pages specific to the current ASID.
+ *
+ *  The supplied VA need not be aligned; it may be anywhere in the
+ *  subject page.
+ *
+ *  Specifying an invalid virtual address may lead to client termination,
+ *  or may silently succeed.  "Invalid" in this context means a value
+ *  which was not provided to the client via hv_inquire_virtual.
+ *
+ * @param address Address of the page to flush.
+ * @param page_size Size of pages to assume.
+ * @return Zero on success, or a hypervisor error code on failure.
+ */
+int hv_flush_page(HV_VirtAddr address, HV_PageSize page_size);
+
+
+/** Flushes all translations associated with the named virtual address range
+ *  and page size from the TLB and other hypervisor data structures. Only
+ *  pages visible to the current ASID are affected; note that this includes
+ *  global pages in addition to pages specific to the current ASID.
+ *
+ *  The supplied VA need not be aligned; it may be anywhere in the
+ *  subject page.
+ *
+ *  Specifying an invalid virtual address may lead to client termination,
+ *  or may silently succeed.  "Invalid" in this context means a value
+ *  which was not provided to the client via hv_inquire_virtual.
+ *
+ * @param start Address to flush.
+ * @param page_size Size of pages to assume.
+ * @param size The number of bytes to flush. Any page in the range
+ *        [start, start + size) will be flushed from the TLB.
+ * @return Zero on success, or a hypervisor error code on failure.
+ */
+int hv_flush_pages(HV_VirtAddr start, HV_PageSize page_size,
+                   unsigned long size);
+
+
+/** Flushes all non-global translations (if preserve_global is true),
+ *  or absolutely all translations (if preserve_global is false).
+ *
+ * @param preserve_global Non-zero if we want to preserve "global" mappings.
+ * @return Zero on success, or a hypervisor error code on failure.
+*/
+int hv_flush_all(int preserve_global);
+
+
+/** Restart machine with optional restart command and optional args.
+ * @param cmd Const pointer to command to restart with, or NULL
+ * @param args Const pointer to argument string to restart with, or NULL
+ */
+void hv_restart(HV_VirtAddr cmd, HV_VirtAddr args);
+
+
+/** Halt machine. */
+void hv_halt(void);
+
+
+/** Power off machine. */
+void hv_power_off(void);
+
+
+/** Re-enter virtual-is-physical memory translation mode and restart
+ *  execution at a given address.
+ * @param entry Client physical address at which to begin execution.
+ * @return A hypervisor error code on failure; if the operation is
+ *         successful the call does not return.
+ */
+int hv_reexec(HV_PhysAddr entry);
+
+
+/** Chip topology */
+typedef struct
+{
+  /** Relative coordinates of the querying tile */
+  HV_Coord coord;
+
+  /** Width of the querying supervisor's tile rectangle. */
+  int width;
+
+  /** Height of the querying supervisor's tile rectangle. */
+  int height;
+
+} HV_Topology;
+
+/** Returns information about the tile coordinate system.
+ *
+ * Each supervisor is given a rectangle of tiles it potentially controls.
+ * These tiles are labeled using a relative coordinate system with (0,0) as
+ * the upper left tile regardless of their physical location on the chip.
+ *
+ * This call returns both the size of that rectangle and the position
+ * within that rectangle of the querying tile.
+ *
+ * Not all tiles within that rectangle may be available to the supervisor;
+ * to get the precise set of available tiles, you must also call
+ * hv_inquire_tiles(HV_INQ_TILES_AVAIL, ...).
+ **/
+HV_Topology hv_inquire_topology(void);
+
+/** Sets of tiles we can retrieve with hv_inquire_tiles().
+ *
+ * These numbers are part of the binary API and guaranteed not to change.
+ */
+typedef enum {
+  /** An invalid value; do not use. */
+  _HV_INQ_TILES_RESERVED       = 0,
+
+  /** All available tiles within the supervisor's tile rectangle. */
+  HV_INQ_TILES_AVAIL           = 1,
+
+  /** The set of tiles used for hash-for-home caching. */
+  HV_INQ_TILES_HFH_CACHE       = 2,
+
+  /** The set of tiles that can be legally used as a LOTAR for a PTE. */
+  HV_INQ_TILES_LOTAR           = 3
+} HV_InqTileSet;
+
+/** Returns specific information about various sets of tiles within the
+ *  supervisor's tile rectangle.
+ *
+ * @param set Which set of tiles to retrieve.
+ * @param cpumask Pointer to a returned bitmask (in row-major order,
+ *        supervisor-relative) of tiles.  The low bit of the first word
+ *        corresponds to the tile at the upper left-hand corner of the
+ *        supervisor's rectangle.  In order for the supervisor to know the
+ *        buffer length to supply, it should first call hv_inquire_topology.
+ * @param length Number of bytes available for the returned bitmask.
+ **/
+HV_Errno hv_inquire_tiles(HV_InqTileSet set, HV_VirtAddr cpumask, int length);
+
+
+/** An identifier for a memory controller. Multiple memory controllers
+ * may be connected to one chip, and this uniquely identifies each one.
+ */
+typedef int HV_MemoryController;
+
+/** A range of physical memory. */
+typedef struct
+{
+  HV_PhysAddr start;   /**< Starting address. */
+  __hv64 size;         /**< Size in bytes. */
+  HV_MemoryController controller;  /**< Which memory controller owns this. */
+} HV_PhysAddrRange;
+
+/** Returns information about a range of physical memory.
+ *
+ * hv_inquire_physical() returns one of the ranges of client
+ * physical addresses which are available to this client.
+ *
+ * The first range is retrieved by specifying an idx of 0, and
+ * successive ranges are returned with subsequent idx values.  Ranges
+ * are ordered by increasing start address (i.e., as idx increases,
+ * so does start), do not overlap, and do not touch (i.e., the
+ * available memory is described with the fewest possible ranges).
+ *
+ * If an out-of-range idx value is specified, the returned size will be zero.
+ * A client can count the number of ranges by increasing idx until the
+ * returned size is zero. There will always be at least one valid range.
+ *
+ * Some clients might not be prepared to deal with more than one
+ * physical address range; they still ought to call this routine and
+ * issue a warning message if they're given more than one range, on the
+ * theory that whoever configured the hypervisor to provide that memory
+ * should know that it's being wasted.
+ */
+HV_PhysAddrRange hv_inquire_physical(int idx);
+
+
+/** Memory controller information. */
+typedef struct
+{
+  HV_Coord coord;   /**< Relative tile coordinates of the port used by a
+                         specified tile to communicate with this controller. */
+  __hv64 speed;     /**< Speed of this controller in bytes per second. */
+} HV_MemoryControllerInfo;
+
+/** Returns information about a particular memory controller.
+ *
+ *  hv_inquire_memory_controller(coord,idx) returns information about a
+ *  particular controller.  Two pieces of information are returned:
+ *  - The relative coordinates of the port on the controller that the specified
+ *    tile would use to contact it.  The relative coordinates may lie
+ *    outside the supervisor's rectangle, i.e. the controller may not
+ *    be attached to a node managed by the querying node's supervisor.
+ *    In particular note that x or y may be negative.
+ *  - The speed of the memory controller.  (This is a not-to-exceed value
+ *    based on the raw hardware data rate, and may not be achievable in
+ *    practice; it is provided to give clients information on the relative
+ *    performance of the available controllers.)
+ *
+ *  Clients should avoid calling this interface with invalid values.
+ *  A client who does may be terminated.
+ * @param coord Tile for which to calculate the relative port position.
+ * @param controller Index of the controller; identical to value returned
+ *        from other routines like hv_inquire_physical.
+ * @return Information about the controller.
+ */
+HV_MemoryControllerInfo hv_inquire_memory_controller(HV_Coord coord,
+                                                     int controller);
+
+
+/** A range of virtual memory. */
+typedef struct
+{
+  HV_VirtAddr start;   /**< Starting address. */
+  __hv64 size;         /**< Size in bytes. */
+} HV_VirtAddrRange;
+
+/** Returns information about a range of virtual memory.
+ *
+ * hv_inquire_virtual() returns one of the ranges of client
+ * virtual addresses which are available to this client.
+ *
+ * The first range is retrieved by specifying an idx of 0, and
+ * successive ranges are returned with subsequent idx values.  Ranges
+ * are ordered by increasing start address (i.e., as idx increases,
+ * so does start), do not overlap, and do not touch (i.e., the
+ * available memory is described with the fewest possible ranges).
+ *
+ * If an out-of-range idx value is specified, the returned size will be zero.
+ * A client can count the number of ranges by increasing idx until the
+ * returned size is zero. There will always be at least one valid range.
+ *
+ * Some clients may well have various virtual addresses hardwired
+ * into themselves; for instance, their instruction stream may
+ * have been compiled expecting to live at a particular address.
+ * Such clients should use this interface to verify they've been
+ * given the virtual address space they expect, and issue a (potentially
+ * fatal) warning message otherwise.
+ *
+ * Note that the returned size is a __hv64, not a __hv32, so it is
+ * possible to express a single range spanning the entire 32-bit
+ * address space.
+ */
+HV_VirtAddrRange hv_inquire_virtual(int idx);
+
+
+/** A range of ASID values. */
+typedef struct
+{
+  HV_ASID start;        /**< First ASID in the range. */
+  unsigned int size;    /**< Number of ASIDs. Zero for an invalid range. */
+} HV_ASIDRange;
+
+/** Returns information about a range of ASIDs.
+ *
+ * hv_inquire_asid() returns one of the ranges of address
+ * space identifiers which are available to this client.
+ *
+ * The first range is retrieved by specifying an idx of 0, and
+ * successive ranges are returned with subsequent idx values.  Ranges
+ * are ordered by increasing start value (i.e., as idx increases,
+ * so does start), do not overlap, and do not touch (i.e., the
+ * available ASIDs are described with the fewest possible ranges).
+ *
+ * If an out-of-range idx value is specified, the returned size will be zero.
+ * A client can count the number of ranges by increasing idx until the
+ * returned size is zero. There will always be at least one valid range.
+ */
+HV_ASIDRange hv_inquire_asid(int idx);
+
+
+/** Waits for at least the specified number of nanoseconds then returns.
+ *
+ * @param nanosecs The number of nanoseconds to sleep.
+ */
+void hv_nanosleep(int nanosecs);
+
+
+/** Reads a character from the console without blocking.
+ *
+ * @return A value from 0-255 indicates the value successfully read.
+ * A negative value means no value was ready.
+ */
+int hv_console_read_if_ready(void);
+
+
+/** Writes a character to the console, blocking if the console is busy.
+ *
+ *  This call cannot fail. If the console is broken for some reason,
+ *  output will simply vanish.
+ * @param byte Character to write.
+ */
+void hv_console_putc(int byte);
+
+
+/** Writes a string to the console, blocking if the console is busy.
+ * @param bytes Pointer to characters to write.
+ * @param len Number of characters to write.
+ * @return Number of characters written, or HV_EFAULT if the buffer is invalid.
+ */
+int hv_console_write(HV_VirtAddr bytes, int len);
+
+
+/** Dispatch the next interrupt from the client downcall mechanism.
+ *
+ *  The hypervisor uses downcalls to notify the client of asynchronous
+ *  events.  Some of these events are hypervisor-created (like incoming
+ *  messages).  Some are regular interrupts which initially occur in
+ *  the hypervisor, and are normally handled directly by the client;
+ *  when these occur in a client's interrupt critical section, they must
+ *  be delivered through the downcall mechanism.
+ *
+ *  A downcall is initially delivered to the client as an INTCTRL_1
+ *  interrupt.  Upon entry to the INTCTRL_1 vector, the client must
+ *  immediately invoke the hv_downcall_dispatch service.  This service
+ *  will not return; instead it will cause one of the client's actual
+ *  downcall-handling interrupt vectors to be entered.  The EX_CONTEXT
+ *  registers in the client will be set so that when the client irets,
+ *  it will return to the code which was interrupted by the INTCTRL_1
+ *  interrupt.
+ *
+ *  Under some circumstances, the firing of INTCTRL_1 can race with
+ *  the lowering of a device interrupt.  In such a case, the
+ *  hv_downcall_dispatch service may issue an iret instruction instead
+ *  of entering one of the client's actual downcall-handling interrupt
+ *  vectors.  This will return execution to the location that was
+ *  interrupted by INTCTRL_1.
+ *
+ *  Any saving of registers should be done by the actual handling
+ *  vectors; no registers should be changed by the INTCTRL_1 handler.
+ *  In particular, the client should not use a jal instruction to invoke
+ *  the hv_downcall_dispatch service, as that would overwrite the client's
+ *  lr register.  Note that the hv_downcall_dispatch service may overwrite
+ *  one or more of the client's system save registers.
+ *
+ *  The client must not modify the INTCTRL_1_STATUS SPR.  The hypervisor
+ *  will set this register to cause a downcall to happen, and will clear
+ *  it when no further downcalls are pending.
+ *
+ *  When a downcall vector is entered, the INTCTRL_1 interrupt will be
+ *  masked.  When the client is done processing a downcall, and is ready
+ *  to accept another, it must unmask this interrupt; if more downcalls
+ *  are pending, this will cause the INTCTRL_1 vector to be reentered.
+ *  Currently the following interrupt vectors can be entered through a
+ *  downcall:
+ *
+ *  INT_MESSAGE_RCV_DWNCL   (hypervisor message available)
+ *  INT_DMATLB_MISS_DWNCL   (DMA TLB miss)
+ *  INT_SNITLB_MISS_DWNCL   (SNI TLB miss)
+ *  INT_DMATLB_ACCESS_DWNCL (DMA TLB access violation)
+ */
+void hv_downcall_dispatch(void);
+
+#endif /* !__ASSEMBLER__ */
+
+/** We use actual interrupt vectors which never occur (they're only there
+ *  to allow setting MPLs for related SPRs) for our downcall vectors.
+ */
+/** Message receive downcall interrupt vector */
+#define INT_MESSAGE_RCV_DWNCL    INT_BOOT_ACCESS
+/** DMA TLB miss downcall interrupt vector */
+#define INT_DMATLB_MISS_DWNCL    INT_DMA_ASID
+/** Static nework processor instruction TLB miss interrupt vector */
+#define INT_SNITLB_MISS_DWNCL    INT_SNI_ASID
+/** DMA TLB access violation downcall interrupt vector */
+#define INT_DMATLB_ACCESS_DWNCL  INT_DMA_CPL
+/** Device interrupt downcall interrupt vector */
+#define INT_DEV_INTR_DWNCL       INT_WORLD_ACCESS
+
+#ifndef __ASSEMBLER__
+
+/** Requests the inode for a specific full pathname.
+ *
+ * Performs a lookup in the hypervisor filesystem for a given filename.
+ * Multiple calls with the same filename will always return the same inode.
+ * If there is no such filename, HV_ENOENT is returned.
+ * A bad filename pointer may result in HV_EFAULT instead.
+ *
+ * @param filename Constant pointer to name of requested file
+ * @return Inode of requested file
+ */
+int hv_fs_findfile(HV_VirtAddr filename);
+
+
+/** Data returned from an fstat request.
+ * Note that this structure should be no more than 40 bytes in size so
+ * that it can always be returned completely in registers.
+ */
+typedef struct
+{
+  int size;             /**< Size of file (or HV_Errno on error) */
+  unsigned int flags;   /**< Flags (see HV_FS_FSTAT_FLAGS) */
+} HV_FS_StatInfo;
+
+/** Bitmask flags for fstat request */
+typedef enum
+{
+  HV_FS_ISDIR    = 0x0001   /**< Is the entry a directory? */
+} HV_FS_FSTAT_FLAGS;
+
+/** Get stat information on a given file inode.
+ *
+ * Return information on the file with the given inode.
+ *
+ * IF the HV_FS_ISDIR bit is set, the "file" is a directory.  Reading
+ * it will return NUL-separated filenames (no directory part) relative
+ * to the path to the inode of the directory "file".  These can be
+ * appended to the path to the directory "file" after a forward slash
+ * to create additional filenames.  Note that it is not required
+ * that all valid paths be decomposable into valid parent directories;
+ * a filesystem may validly have just a few files, none of which have
+ * HV_FS_ISDIR set.  However, if clients may wish to enumerate the
+ * files in the filesystem, it is recommended to include all the
+ * appropriate parent directory "files" to give a consistent view.
+ *
+ * An invalid file inode will cause an HV_EBADF error to be returned.
+ *
+ * @param inode The inode number of the query
+ * @return An HV_FS_StatInfo structure
+ */
+HV_FS_StatInfo hv_fs_fstat(int inode);
+
+
+/** Read data from a specific hypervisor file.
+ * On error, may return HV_EBADF for a bad inode or HV_EFAULT for a bad buf.
+ * Reads near the end of the file will return fewer bytes than requested.
+ * Reads at or beyond the end of a file will return zero.
+ *
+ * @param inode the hypervisor file to read
+ * @param buf the buffer to read data into
+ * @param length the number of bytes of data to read
+ * @param offset the offset into the file to read the data from
+ * @return number of bytes successfully read, or an HV_Errno code
+ */
+int hv_fs_pread(int inode, HV_VirtAddr buf, int length, int offset);
+
+
+/** Read a 64-bit word from the specified physical address.
+ * The address must be 8-byte aligned.
+ * Specifying an invalid physical address will lead to client termination.
+ * @param addr The physical address to read
+ * @param access The PTE describing how to read the memory
+ * @return The 64-bit value read from the given address
+ */
+unsigned long long hv_physaddr_read64(HV_PhysAddr addr, HV_PTE access);
+
+
+/** Write a 64-bit word to the specified physical address.
+ * The address must be 8-byte aligned.
+ * Specifying an invalid physical address will lead to client termination.
+ * @param addr The physical address to write
+ * @param access The PTE that says how to write the memory
+ * @param val The 64-bit value to write to the given address
+ */
+void hv_physaddr_write64(HV_PhysAddr addr, HV_PTE access,
+                         unsigned long long val);
+
+
+/** Get the value of the command-line for the supervisor, if any.
+ * This will not include the filename of the booted supervisor, but may
+ * include configured-in boot arguments or the hv_restart() arguments.
+ * If the buffer is not long enough the hypervisor will NUL the first
+ * character of the buffer but not write any other data.
+ * @param buf The virtual address to write the command-line string to.
+ * @param length The length of buf, in characters.
+ * @return The actual length of the command line, including the trailing NUL
+ *         (may be larger than "length").
+ */
+int hv_get_command_line(HV_VirtAddr buf, int length);
+
+
+/** Set a new value for the command-line for the supervisor, which will
+ *  be returned from subsequent invocations of hv_get_command_line() on
+ *  this tile.
+ * @param buf The virtual address to read the command-line string from.
+ * @param length The length of buf, in characters; must be no more than
+ *        HV_COMMAND_LINE_LEN.
+ * @return Zero if successful, or a hypervisor error code.
+ */
+HV_Errno hv_set_command_line(HV_VirtAddr buf, int length);
+
+/** Maximum size of a command line passed to hv_set_command_line(); note
+ *  that a line returned from hv_get_command_line() could be larger than
+ *  this.*/
+#define HV_COMMAND_LINE_LEN  256
+
+/** Tell the hypervisor how to cache non-priority pages
+ * (its own as well as pages explicitly represented in page tables).
+ * Normally these will be represented as red/black pages, but
+ * when the supervisor starts to allocate "priority" pages in the PTE
+ * the hypervisor will need to start marking those pages as (e.g.) "red"
+ * and non-priority pages as either "black" (if they cache-alias
+ * with the existing priority pages) or "red/black" (if they don't).
+ * The bitmask provides information on which parts of the cache
+ * have been used for pinned pages so far on this tile; if (1 << N)
+ * appears in the bitmask, that indicates that a page has been marked
+ * "priority" whose PFN equals N, mod 8.
+ * @param bitmask A bitmap of priority page set values
+ */
+void hv_set_caching(unsigned int bitmask);
+
+
+/** Zero out a specified number of pages.
+ * The va and size must both be multiples of 4096.
+ * Caches are bypassed and memory is directly set to zero.
+ * This API is implemented only in the magic hypervisor and is intended
+ * to provide a performance boost to the minimal supervisor by
+ * giving it a fast way to zero memory pages when allocating them.
+ * @param va Virtual address where the page has been mapped
+ * @param size Number of bytes (must be a page size multiple)
+ */
+void hv_bzero_page(HV_VirtAddr va, unsigned int size);
+
+
+/** State object for the hypervisor messaging subsystem. */
+typedef struct
+{
+#if CHIP_VA_WIDTH() > 32
+  __hv64 opaque[2]; /**< No user-serviceable parts inside */
+#else
+  __hv32 opaque[2]; /**< No user-serviceable parts inside */
+#endif
+}
+HV_MsgState;
+
+/** Register to receive incoming messages.
+ *
+ *  This routine configures the current tile so that it can receive
+ *  incoming messages.  It must be called before the client can receive
+ *  messages with the hv_receive_message routine, and must be called on
+ *  each tile which will receive messages.
+ *
+ *  msgstate is the virtual address of a state object of type HV_MsgState.
+ *  Once the state is registered, the client must not read or write the
+ *  state object; doing so will cause undefined results.
+ *
+ *  If this routine is called with msgstate set to 0, the client's message
+ *  state will be freed and it will no longer be able to receive messages.
+ *  Note that this may cause the loss of any as-yet-undelivered messages
+ *  for the client.
+ *
+ *  If another client attempts to send a message to a client which has
+ *  not yet called hv_register_message_state, or which has freed its
+ *  message state, the message will not be delivered, as if the client
+ *  had insufficient buffering.
+ *
+ *  This routine returns HV_OK if the registration was successful, and
+ *  HV_EINVAL if the supplied state object is unsuitable.  Note that some
+ *  errors may not be detected during this routine, but might be detected
+ *  during a subsequent message delivery.
+ * @param msgstate State object.
+ **/
+HV_Errno hv_register_message_state(HV_MsgState* msgstate);
+
+/** Possible message recipient states. */
+typedef enum
+{
+  HV_TO_BE_SENT,    /**< Not sent (not attempted, or recipient not ready) */
+  HV_SENT,          /**< Successfully sent */
+  HV_BAD_RECIP      /**< Bad recipient coordinates (permanent error) */
+} HV_Recip_State;
+
+/** Message recipient. */
+typedef struct
+{
+  /** X coordinate, relative to supervisor's top-left coordinate */
+  unsigned int x:11;
+
+  /** Y coordinate, relative to supervisor's top-left coordinate */
+  unsigned int y:11;
+
+  /** Status of this recipient */
+  HV_Recip_State state:10;
+} HV_Recipient;
+
+/** Send a message to a set of recipients.
+ *
+ *  This routine sends a message to a set of recipients.
+ *
+ *  recips is an array of HV_Recipient structures.  Each specifies a tile,
+ *  and a message state; initially, it is expected that the state will
+ *  be set to HV_TO_BE_SENT.  nrecip specifies the number of recipients
+ *  in the recips array.
+ *
+ *  For each recipient whose state is HV_TO_BE_SENT, the hypervisor attempts
+ *  to send that tile the specified message.  In order to successfully
+ *  receive the message, the receiver must be a valid tile to which the
+ *  sender has access, must not be the sending tile itself, and must have
+ *  sufficient free buffer space.  (The hypervisor guarantees that each
+ *  tile which has called hv_register_message_state() will be able to
+ *  buffer one message from every other tile which can legally send to it;
+ *  more space may be provided but is not guaranteed.)  If an invalid tile
+ *  is specified, the recipient's state is set to HV_BAD_RECIP; this is a
+ *  permanent delivery error.  If the message is successfully delivered
+ *  to the recipient's buffer, the recipient's state is set to HV_SENT.
+ *  Otherwise, the recipient's state is unchanged.  Message delivery is
+ *  synchronous; all attempts to send messages are completed before this
+ *  routine returns.
+ *
+ *  If no permanent delivery errors were encountered, the routine returns
+ *  the number of messages successfully sent: that is, the number of
+ *  recipients whose states changed from HV_TO_BE_SENT to HV_SENT during
+ *  this operation.  If any permanent delivery errors were encountered,
+ *  the routine returns HV_ERECIP.  In the event of permanent delivery
+ *  errors, it may be the case that delivery was not attempted to all
+ *  recipients; if any messages were succesfully delivered, however,
+ *  recipients' state values will be updated appropriately.
+ *
+ *  It is explicitly legal to specify a recipient structure whose state
+ *  is not HV_TO_BE_SENT; such a recipient is ignored.  One suggested way
+ *  of using hv_send_message to send a message to multiple tiles is to set
+ *  up a list of recipients, and then call the routine repeatedly with the
+ *  same list, each time accumulating the number of messages successfully
+ *  sent, until all messages are sent, a permanent error is encountered,
+ *  or the desired number of attempts have been made.  When used in this
+ *  way, the routine will deliver each message no more than once to each
+ *  recipient.
+ *
+ *  Note that a message being successfully delivered to the recipient's
+ *  buffer space does not guarantee that it is received by the recipient,
+ *  either immediately or at any time in the future; the recipient might
+ *  never call hv_receive_message, or could register a different state
+ *  buffer, losing the message.
+ *
+ *  Specifiying the same recipient more than once in the recipient list
+ *  is an error, which will not result in an error return but which may
+ *  or may not result in more than one message being delivered to the
+ *  recipient tile.
+ *
+ *  buf and buflen specify the message to be sent.  buf is a virtual address
+ *  which must be currently mapped in the client's page table; if not, the
+ *  routine returns HV_EFAULT.  buflen must be greater than zero and less
+ *  than or equal to HV_MAX_MESSAGE_SIZE, and nrecip must be less than the
+ *  number of tiles to which the sender has access; if not, the routine
+ *  returns HV_EINVAL.
+ * @param recips List of recipients.
+ * @param nrecip Number of recipients.
+ * @param buf Address of message data.
+ * @param buflen Length of message data.
+ **/
+int hv_send_message(HV_Recipient *recips, int nrecip,
+                    HV_VirtAddr buf, int buflen);
+
+/** Maximum hypervisor message size, in bytes */
+#define HV_MAX_MESSAGE_SIZE 28
+
+
+/** Return value from hv_receive_message() */
+typedef struct
+{
+  int msglen;     /**< Message length in bytes, or an error code */
+  __hv32 source;  /**< Code identifying message sender (HV_MSG_xxx) */
+} HV_RcvMsgInfo;
+
+#define HV_MSG_TILE 0x0         /**< Message source is another tile */
+#define HV_MSG_INTR 0x1         /**< Message source is a driver interrupt */
+
+/** Receive a message.
+ *
+ * This routine retrieves a message from the client's incoming message
+ * buffer.
+ *
+ * Multiple messages sent from a particular sending tile to a particular
+ * receiving tile are received in the order that they were sent; however,
+ * no ordering is guaranteed between messages sent by different tiles.
+ *
+ * Whenever the a client's message buffer is empty, the first message
+ * subsequently received will cause the client's MESSAGE_RCV_DWNCL
+ * interrupt vector to be invoked through the interrupt downcall mechanism
+ * (see the description of the hv_downcall_dispatch() routine for details
+ * on downcalls).
+ *
+ * Another message-available downcall will not occur until a call to
+ * this routine is made when the message buffer is empty, and a message
+ * subsequently arrives.  Note that such a downcall could occur while
+ * this routine is executing.  If the calling code does not wish this
+ * to happen, it is recommended that this routine be called with the
+ * INTCTRL_1 interrupt masked, or inside an interrupt critical section.
+ *
+ * msgstate is the value previously passed to hv_register_message_state().
+ * buf is the virtual address of the buffer into which the message will
+ * be written; buflen is the length of the buffer.
+ *
+ * This routine returns an HV_RcvMsgInfo structure.  The msglen member
+ * of that structure is the length of the message received, zero if no
+ * message is available, or HV_E2BIG if the message is too large for the
+ * specified buffer.  If the message is too large, it is not consumed,
+ * and may be retrieved by a subsequent call to this routine specifying
+ * a sufficiently large buffer.  A buffer which is HV_MAX_MESSAGE_SIZE
+ * bytes long is guaranteed to be able to receive any possible message.
+ *
+ * The source member of the HV_RcvMsgInfo structure describes the sender
+ * of the message.  For messages sent by another client tile via an
+ * hv_send_message() call, this value is HV_MSG_TILE; for messages sent
+ * as a result of a device interrupt, this value is HV_MSG_INTR.
+ */
+
+HV_RcvMsgInfo hv_receive_message(HV_MsgState msgstate, HV_VirtAddr buf,
+                                 int buflen);
+
+
+/** Start remaining tiles owned by this supervisor.  Initially, only one tile
+ *  executes the client program; after it calls this service, the other tiles
+ *  are started.  This allows the initial tile to do one-time configuration
+ *  of shared data structures without having to lock them against simultaneous
+ *  access.
+ */
+void hv_start_all_tiles(void);
+
+
+/** Open a hypervisor device.
+ *
+ *  This service initializes an I/O device and its hypervisor driver software,
+ *  and makes it available for use.  The open operation is per-device per-chip;
+ *  once it has been performed, the device handle returned may be used in other
+ *  device services calls made by any tile.
+ *
+ * @param name Name of the device.  A base device name is just a text string
+ *        (say, "pcie").  If there is more than one instance of a device, the
+ *        base name is followed by a slash and a device number (say, "pcie/0").
+ *        Some devices may support further structure beneath those components;
+ *        most notably, devices which require control operations do so by
+ *        supporting reads and/or writes to a control device whose name
+ *        includes a trailing "/ctl" (say, "pcie/0/ctl").
+ * @param flags Flags (HV_DEV_xxx).
+ * @return A positive integer device handle, or a negative error code.
+ */
+int hv_dev_open(HV_VirtAddr name, __hv32 flags);
+
+
+/** Close a hypervisor device.
+ *
+ *  This service uninitializes an I/O device and its hypervisor driver
+ *  software, and makes it unavailable for use.  The close operation is
+ *  per-device per-chip; once it has been performed, the device is no longer
+ *  available.  Normally there is no need to ever call the close service.
+ *
+ * @param devhdl Device handle of the device to be closed.
+ * @return Zero if the close is successful, otherwise, a negative error code.
+ */
+int hv_dev_close(int devhdl);
+
+
+/** Read data from a hypervisor device synchronously.
+ *
+ *  This service transfers data from a hypervisor device to a memory buffer.
+ *  When the service returns, the data has been written from the memory buffer,
+ *  and the buffer will not be further modified by the driver.
+ *
+ *  No ordering is guaranteed between requests issued from different tiles.
+ *
+ *  Devices may choose to support both the synchronous and asynchronous read
+ *  operations, only one of them, or neither of them.
+ *
+ * @param devhdl Device handle of the device to be read from.
+ * @param flags Flags (HV_DEV_xxx).
+ * @param va Virtual address of the target data buffer.  This buffer must
+ *        be mapped in the currently installed page table; if not, HV_EFAULT
+ *        may be returned.
+ * @param len Number of bytes to be transferred.
+ * @param offset Driver-dependent offset.  For a random-access device, this is
+ *        often a byte offset from the beginning of the device; in other cases,
+ *        like on a control device, it may have a different meaning.
+ * @return A non-negative value if the read was at least partially successful;
+ *         otherwise, a negative error code.  The precise interpretation of
+ *         the return value is driver-dependent, but many drivers will return
+ *         the number of bytes successfully transferred.
+ */
+int hv_dev_pread(int devhdl, __hv32 flags, HV_VirtAddr va, __hv32 len,
+                 __hv64 offset);
+
+#define HV_DEV_NB_EMPTY     0x1   /**< Don't block when no bytes of data can
+                                       be transferred. */
+#define HV_DEV_NB_PARTIAL   0x2   /**< Don't block when some bytes, but not all
+                                       of the requested bytes, can be
+                                       transferred. */
+#define HV_DEV_NOCACHE      0x4   /**< The caller warrants that none of the
+                                       cache lines which might contain data
+                                       from the requested buffer are valid.
+                                       Useful with asynchronous operations
+                                       only. */
+
+#define HV_DEV_ALLFLAGS     (HV_DEV_NB_EMPTY | HV_DEV_NB_PARTIAL | \
+                             HV_DEV_NOCACHE)   /**< All HV_DEV_xxx flags */
+
+/** Write data to a hypervisor device synchronously.
+ *
+ *  This service transfers data from a memory buffer to a hypervisor device.
+ *  When the service returns, the data has been read from the memory buffer,
+ *  and the buffer may be overwritten by the client; the data may not
+ *  necessarily have been conveyed to the actual hardware I/O interface.
+ *
+ *  No ordering is guaranteed between requests issued from different tiles.
+ *
+ *  Devices may choose to support both the synchronous and asynchronous write
+ *  operations, only one of them, or neither of them.
+ *
+ * @param devhdl Device handle of the device to be written to.
+ * @param flags Flags (HV_DEV_xxx).
+ * @param va Virtual address of the source data buffer.  This buffer must
+ *        be mapped in the currently installed page table; if not, HV_EFAULT
+ *        may be returned.
+ * @param len Number of bytes to be transferred.
+ * @param offset Driver-dependent offset.  For a random-access device, this is
+ *        often a byte offset from the beginning of the device; in other cases,
+ *        like on a control device, it may have a different meaning.
+ * @return A non-negative value if the write was at least partially successful;
+ *         otherwise, a negative error code.  The precise interpretation of
+ *         the return value is driver-dependent, but many drivers will return
+ *         the number of bytes successfully transferred.
+ */
+int hv_dev_pwrite(int devhdl, __hv32 flags, HV_VirtAddr va, __hv32 len,
+                  __hv64 offset);
+
+
+/** Interrupt arguments, used in the asynchronous I/O interfaces. */
+#if CHIP_VA_WIDTH() > 32
+typedef __hv64 HV_IntArg;
+#else
+typedef __hv32 HV_IntArg;
+#endif
+
+/** Interrupt messages are delivered via the mechanism as normal messages,
+ *  but have a message source of HV_DEV_INTR.  The message is formatted
+ *  as an HV_IntrMsg structure.
+ */
+
+typedef struct
+{
+  HV_IntArg intarg;  /**< Interrupt argument, passed to the poll/preada/pwritea
+                          services */
+  HV_IntArg intdata; /**< Interrupt-specific interrupt data */
+} HV_IntrMsg;
+
+/** Request an interrupt message when a device condition is satisfied.
+ *
+ *  This service requests that an interrupt message be delivered to the
+ *  requesting tile when a device becomes readable or writable, or when any
+ *  data queued to the device via previous write operations from this tile
+ *  has been actually sent out on the hardware I/O interface.  Devices may
+ *  choose to support any, all, or none of the available conditions.
+ *
+ *  If multiple conditions are specified, only one message will be
+ *  delivered.  If the event mask delivered to that interrupt handler
+ *  indicates that some of the conditions have not yet occurred, the
+ *  client must issue another poll() call if it wishes to wait for those
+ *  conditions.
+ *
+ *  Only one poll may be outstanding per device handle per tile.  If more than
+ *  one tile is polling on the same device and condition, they will all be
+ *  notified when it happens.  Because of this, clients may not assume that
+ *  the condition signaled is necessarily still true when they request a
+ *  subsequent service; for instance, the readable data which caused the
+ *  poll call to interrupt may have been read by another tile in the interim.
+ *
+ *  The notification interrupt message could come directly, or via the
+ *  downcall (intctrl1) method, depending on what the tile is doing
+ *  when the condition is satisfied.  Note that it is possible for the
+ *  requested interrupt to be delivered after this service is called but
+ *  before it returns.
+ *
+ * @param devhdl Device handle of the device to be polled.
+ * @param events Flags denoting the events which will cause the interrupt to
+ *        be delivered (HV_DEVPOLL_xxx).
+ * @param intarg Value which will be delivered as the intarg member of the
+ *        eventual interrupt message; the intdata member will be set to a
+ *        mask of HV_DEVPOLL_xxx values indicating which conditions have been
+ *        satisifed.
+ * @return Zero if the interrupt was successfully scheduled; otherwise, a
+ *         negative error code.
+ */
+int hv_dev_poll(int devhdl, __hv32 events, HV_IntArg intarg);
+
+#define HV_DEVPOLL_READ     0x1   /**< Test device for readability */
+#define HV_DEVPOLL_WRITE    0x2   /**< Test device for writability */
+#define HV_DEVPOLL_FLUSH    0x4   /**< Test device for output drained */
+
+
+/** Cancel a request for an interrupt when a device event occurs.
+ *
+ *  This service requests that no interrupt be delivered when the events
+ *  noted in the last-issued poll() call happen.  Once this service returns,
+ *  the interrupt has been canceled; however, it is possible for the interrupt
+ *  to be delivered after this service is called but before it returns.
+ *
+ * @param devhdl Device handle of the device on which to cancel polling.
+ * @return Zero if the poll was successfully canceled; otherwise, a negative
+ *         error code.
+ */
+int hv_dev_poll_cancel(int devhdl);
+
+
+/** Scatter-gather list for preada/pwritea calls. */
+typedef struct
+#if CHIP_VA_WIDTH() <= 32
+__attribute__ ((packed, aligned(4)))
+#endif
+{
+  HV_PhysAddr pa;  /**< Client physical address of the buffer segment. */
+  HV_PTE pte;      /**< Page table entry describing the caching and location
+                        override characteristics of the buffer segment.  Some
+                        drivers ignore this element and will require that
+                        the NOCACHE flag be set on their requests. */
+  __hv32 len;      /**< Length of the buffer segment. */
+} HV_SGL;
+
+#define HV_SGL_MAXLEN 16  /**< Maximum number of entries in a scatter-gather
+                               list */
+
+/** Read data from a hypervisor device asynchronously.
+ *
+ *  This service transfers data from a hypervisor device to a memory buffer.
+ *  When the service returns, the read has been scheduled.  When the read
+ *  completes, an interrupt message will be delivered, and the buffer will
+ *  not be further modified by the driver.
+ *
+ *  The number of possible outstanding asynchronous requests is defined by
+ *  each driver, but it is recommended that it be at least two requests
+ *  per tile per device.
+ *
+ *  No ordering is guaranteed between synchronous and asynchronous requests,
+ *  even those issued on the same tile.
+ *
+ *  The completion interrupt message could come directly, or via the downcall
+ *  (intctrl1) method, depending on what the tile is doing when the read
+ *  completes.  Interrupts do not coalesce; one is delivered for each
+ *  asynchronous I/O request.  Note that it is possible for the requested
+ *  interrupt to be delivered after this service is called but before it
+ *  returns.
+ *
+ *  Devices may choose to support both the synchronous and asynchronous read
+ *  operations, only one of them, or neither of them.
+ *
+ * @param devhdl Device handle of the device to be read from.
+ * @param flags Flags (HV_DEV_xxx).
+ * @param sgl_len Number of elements in the scatter-gather list.
+ * @param sgl Scatter-gather list describing the memory to which data will be
+ *        written.
+ * @param offset Driver-dependent offset.  For a random-access device, this is
+ *        often a byte offset from the beginning of the device; in other cases,
+ *        like on a control device, it may have a different meaning.
+ * @param intarg Value which will be delivered as the intarg member of the
+ *        eventual interrupt message; the intdata member will be set to the
+ *        normal return value from the read request.
+ * @return Zero if the read was successfully scheduled; otherwise, a negative
+ *         error code.  Note that some drivers may choose to pre-validate
+ *         their arguments, and may thus detect certain device error
+ *         conditions at this time rather than when the completion notification
+ *         occurs, but this is not required.
+ */
+int hv_dev_preada(int devhdl, __hv32 flags, __hv32 sgl_len,
+                  HV_SGL sgl[/* sgl_len */], __hv64 offset, HV_IntArg intarg);
+
+
+/** Write data to a hypervisor device asynchronously.
+ *
+ *  This service transfers data from a memory buffer to a hypervisor
+ *  device.  When the service returns, the write has been scheduled.
+ *  When the write completes, an interrupt message will be delivered,
+ *  and the buffer may be overwritten by the client; the data may not
+ *  necessarily have been conveyed to the actual hardware I/O interface.
+ *
+ *  The number of possible outstanding asynchronous requests is defined by
+ *  each driver, but it is recommended that it be at least two requests
+ *  per tile per device.
+ *
+ *  No ordering is guaranteed between synchronous and asynchronous requests,
+ *  even those issued on the same tile.
+ *
+ *  The completion interrupt message could come directly, or via the downcall
+ *  (intctrl1) method, depending on what the tile is doing when the read
+ *  completes.  Interrupts do not coalesce; one is delivered for each
+ *  asynchronous I/O request.  Note that it is possible for the requested
+ *  interrupt to be delivered after this service is called but before it
+ *  returns.
+ *
+ *  Devices may choose to support both the synchronous and asynchronous write
+ *  operations, only one of them, or neither of them.
+ *
+ * @param devhdl Device handle of the device to be read from.
+ * @param flags Flags (HV_DEV_xxx).
+ * @param sgl_len Number of elements in the scatter-gather list.
+ * @param sgl Scatter-gather list describing the memory from which data will be
+ *        read.
+ * @param offset Driver-dependent offset.  For a random-access device, this is
+ *        often a byte offset from the beginning of the device; in other cases,
+ *        like on a control device, it may have a different meaning.
+ * @param intarg Value which will be delivered as the intarg member of the
+ *        eventual interrupt message; the intdata member will be set to the
+ *        normal return value from the write request.
+ * @return Zero if the write was successfully scheduled; otherwise, a negative
+ *         error code.  Note that some drivers may choose to pre-validate
+ *         their arguments, and may thus detect certain device error
+ *         conditions at this time rather than when the completion notification
+ *         occurs, but this is not required.
+ */
+int hv_dev_pwritea(int devhdl, __hv32 flags, __hv32 sgl_len,
+                   HV_SGL sgl[/* sgl_len */], __hv64 offset, HV_IntArg intarg);
+
+
+/** Define a pair of tile and ASID to identify a user process context. */
+typedef struct
+{
+  /** X coordinate, relative to supervisor's top-left coordinate */
+  unsigned int x:11;
+
+  /** Y coordinate, relative to supervisor's top-left coordinate */
+  unsigned int y:11;
+
+  /** ASID of the process on this x,y tile */
+  HV_ASID asid:10;
+} HV_Remote_ASID;
+
+/** Flush cache and/or TLB state on remote tiles.
+ *
+ * @param cache_pa Client physical address to flush from cache (ignored if
+ *        the length encoded in cache_control is zero, or if
+ *        HV_FLUSH_EVICT_L2 is set, or if cache_cpumask is NULL).
+ * @param cache_control This argument allows you to specify a length of
+ *        physical address space to flush (maximum HV_FLUSH_MAX_CACHE_LEN).
+ *        You can "or" in HV_FLUSH_EVICT_L2 to flush the whole L2 cache.
+ *        You can "or" in HV_FLUSH_EVICT_L1I to flush the whole L1I cache.
+ *        HV_FLUSH_ALL flushes all caches.
+ * @param cache_cpumask Bitmask (in row-major order, supervisor-relative) of
+ *        tile indices to perform cache flush on.  The low bit of the first
+ *        word corresponds to the tile at the upper left-hand corner of the
+ *        supervisor's rectangle.  If passed as a NULL pointer, equivalent
+ *        to an empty bitmask.  On chips which support hash-for-home caching,
+ *        if passed as -1, equivalent to a mask containing tiles which could
+ *        be doing hash-for-home caching.
+ * @param tlb_va Virtual address to flush from TLB (ignored if
+ *        tlb_length is zero or tlb_cpumask is NULL).
+ * @param tlb_length Number of bytes of data to flush from the TLB.
+ * @param tlb_pgsize Page size to use for TLB flushes.
+ *        tlb_va and tlb_length need not be aligned to this size.
+ * @param tlb_cpumask Bitmask for tlb flush, like cache_cpumask.
+ *        If passed as a NULL pointer, equivalent to an empty bitmask.
+ * @param asids Pointer to an HV_Remote_ASID array of tile/ASID pairs to flush.
+ * @param asidcount Number of HV_Remote_ASID entries in asids[].
+ * @return Zero for success, or else HV_EINVAL or HV_EFAULT for errors that
+ *        are detected while parsing the arguments.
+ */
+int hv_flush_remote(HV_PhysAddr cache_pa, unsigned long cache_control,
+                    unsigned long* cache_cpumask,
+                    HV_VirtAddr tlb_va, unsigned long tlb_length,
+                    unsigned long tlb_pgsize, unsigned long* tlb_cpumask,
+                    HV_Remote_ASID* asids, int asidcount);
+
+/** Include in cache_control to ensure a flush of the entire L2. */
+#define HV_FLUSH_EVICT_L2 (1UL << 31)
+
+/** Include in cache_control to ensure a flush of the entire L1I. */
+#define HV_FLUSH_EVICT_L1I (1UL << 30)
+
+/** Maximum legal size to use for the "length" component of cache_control. */
+#define HV_FLUSH_MAX_CACHE_LEN ((1UL << 30) - 1)
+
+/** Use for cache_control to ensure a flush of all caches. */
+#define HV_FLUSH_ALL -1UL
+
+#else   /* __ASSEMBLER__ */
+
+/** Include in cache_control to ensure a flush of the entire L2. */
+#define HV_FLUSH_EVICT_L2 (1 << 31)
+
+/** Include in cache_control to ensure a flush of the entire L1I. */
+#define HV_FLUSH_EVICT_L1I (1 << 30)
+
+/** Maximum legal size to use for the "length" component of cache_control. */
+#define HV_FLUSH_MAX_CACHE_LEN ((1 << 30) - 1)
+
+/** Use for cache_control to ensure a flush of all caches. */
+#define HV_FLUSH_ALL -1
+
+#endif  /* __ASSEMBLER__ */
+
+#ifndef __ASSEMBLER__
+
+/** Return a 64-bit value corresponding to the PTE if needed */
+#define hv_pte_val(pte) ((pte).val)
+
+/** Cast a 64-bit value to an HV_PTE */
+#define hv_pte(val) ((HV_PTE) { val })
+
+#endif  /* !__ASSEMBLER__ */
+
+
+/** Bits in the size of an HV_PTE */
+#define HV_LOG2_PTE_SIZE 3
+
+/** Size of an HV_PTE */
+#define HV_PTE_SIZE (1 << HV_LOG2_PTE_SIZE)
+
+
+/* Bits in HV_PTE's low word. */
+#define HV_PTE_INDEX_PRESENT          0  /**< PTE is valid */
+#define HV_PTE_INDEX_MIGRATING        1  /**< Page is migrating */
+#define HV_PTE_INDEX_CLIENT0          2  /**< Page client state 0 */
+#define HV_PTE_INDEX_CLIENT1          3  /**< Page client state 1 */
+#define HV_PTE_INDEX_NC               4  /**< L1$/L2$ incoherent with L3$ */
+#define HV_PTE_INDEX_NO_ALLOC_L1      5  /**< Page is uncached in local L1$ */
+#define HV_PTE_INDEX_NO_ALLOC_L2      6  /**< Page is uncached in local L2$ */
+#define HV_PTE_INDEX_CACHED_PRIORITY  7  /**< Page is priority cached */
+#define HV_PTE_INDEX_PAGE             8  /**< PTE describes a page */
+#define HV_PTE_INDEX_GLOBAL           9  /**< Page is global */
+#define HV_PTE_INDEX_USER            10  /**< Page is user-accessible */
+#define HV_PTE_INDEX_ACCESSED        11  /**< Page has been accessed */
+#define HV_PTE_INDEX_DIRTY           12  /**< Page has been written */
+                                         /*   Bits 13-15 are reserved for
+                                              future use. */
+#define HV_PTE_INDEX_MODE            16  /**< Page mode; see HV_PTE_MODE_xxx */
+#define HV_PTE_MODE_BITS              3  /**< Number of bits in mode */
+                                         /*   Bit 19 is reserved for
+                                              future use. */
+#define HV_PTE_INDEX_LOTAR           20  /**< Page's LOTAR; must be high bits
+                                              of word */
+#define HV_PTE_LOTAR_BITS            12  /**< Number of bits in a LOTAR */
+
+/* Bits in HV_PTE's high word. */
+#define HV_PTE_INDEX_READABLE        32  /**< Page is readable */
+#define HV_PTE_INDEX_WRITABLE        33  /**< Page is writable */
+#define HV_PTE_INDEX_EXECUTABLE      34  /**< Page is executable */
+#define HV_PTE_INDEX_PTFN            35  /**< Page's PTFN; must be high bits
+                                              of word */
+#define HV_PTE_PTFN_BITS             29  /**< Number of bits in a PTFN */
+
+/** Position of the PFN field within the PTE (subset of the PTFN). */
+#define HV_PTE_INDEX_PFN (HV_PTE_INDEX_PTFN + (HV_LOG2_PAGE_SIZE_SMALL - \
+                                               HV_LOG2_PAGE_TABLE_ALIGN))
+
+/** Length of the PFN field within the PTE (subset of the PTFN). */
+#define HV_PTE_INDEX_PFN_BITS (HV_PTE_INDEX_PTFN_BITS - \
+                               (HV_LOG2_PAGE_SIZE_SMALL - \
+                                HV_LOG2_PAGE_TABLE_ALIGN))
+
+/*
+ * Legal values for the PTE's mode field
+ */
+/** Data is not resident in any caches; loads and stores access memory
+ *  directly.
+ */
+#define HV_PTE_MODE_UNCACHED          1
+
+/** Data is resident in the tile's local L1 and/or L2 caches; if a load
+ *  or store misses there, it goes to memory.
+ *
+ *  The copy in the local L1$/L2$ is not invalidated when the copy in
+ *  memory is changed.
+ */
+#define HV_PTE_MODE_CACHE_NO_L3       2
+
+/** Data is resident in the tile's local L1 and/or L2 caches.  If a load
+ *  or store misses there, it goes to an L3 cache in a designated tile;
+ *  if it misses there, it goes to memory.
+ *
+ *  If the NC bit is not set, the copy in the local L1$/L2$ is invalidated
+ *  when the copy in the remote L3$ is changed.  Otherwise, such
+ *  invalidation will not occur.
+ *
+ *  Chips for which CHIP_HAS_COHERENT_LOCAL_CACHE() is 0 do not support
+ *  invalidation from an L3$ to another tile's L1$/L2$.  If the NC bit is
+ *  clear on such a chip, no copy is kept in the local L1$/L2$ in this mode.
+ */
+#define HV_PTE_MODE_CACHE_TILE_L3     3
+
+/** Data is resident in the tile's local L1 and/or L2 caches.  If a load
+ *  or store misses there, it goes to an L3 cache in one of a set of
+ *  designated tiles; if it misses there, it goes to memory.  Which tile
+ *  is chosen from the set depends upon a hash function applied to the
+ *  physical address.  This mode is not supported on chips for which
+ *  CHIP_HAS_CBOX_HOME_MAP() is 0.
+ *
+ *  If the NC bit is not set, the copy in the local L1$/L2$ is invalidated
+ *  when the copy in the remote L3$ is changed.  Otherwise, such
+ *  invalidation will not occur.
+ *
+ *  Chips for which CHIP_HAS_COHERENT_LOCAL_CACHE() is 0 do not support
+ *  invalidation from an L3$ to another tile's L1$/L2$.  If the NC bit is
+ *  clear on such a chip, no copy is kept in the local L1$/L2$ in this mode.
+ */
+#define HV_PTE_MODE_CACHE_HASH_L3     4
+
+/** Data is not resident in memory; accesses are instead made to an I/O
+ *  device, whose tile coordinates are given by the PTE's LOTAR field.
+ *  This mode is only supported on chips for which CHIP_HAS_MMIO() is 1.
+ *  The EXECUTABLE bit may not be set in an MMIO PTE.
+ */
+#define HV_PTE_MODE_MMIO              5
+
+
+/* C wants 1ULL so it is typed as __hv64, but the assembler needs just numbers.
+ * The assembler can't handle shifts greater than 31, but treats them
+ * as shifts mod 32, so assembler code must be aware of which word
+ * the bit belongs in when using these macros.
+ */
+#ifdef __ASSEMBLER__
+#define __HV_PTE_ONE 1        /**< One, for assembler */
+#else
+#define __HV_PTE_ONE 1ULL     /**< One, for C */
+#endif
+
+/** Is this PTE present?
+ *
+ * If this bit is set, this PTE represents a valid translation or level-2
+ * page table pointer.  Otherwise, the page table does not contain a
+ * translation for the subject virtual pages.
+ *
+ * If this bit is not set, the other bits in the PTE are not
+ * interpreted by the hypervisor, and may contain any value.
+ */
+#define HV_PTE_PRESENT               (__HV_PTE_ONE << HV_PTE_INDEX_PRESENT)
+
+/** Does this PTE map a page?
+ *
+ * If this bit is set in the level-1 page table, the entry should be
+ * interpreted as a level-2 page table entry mapping a large page.
+ *
+ * This bit should not be modified by the client while PRESENT is set, as
+ * doing so may race with the hypervisor's update of ACCESSED and DIRTY bits.
+ *
+ * In a level-2 page table, this bit is ignored and must be zero.
+ */
+#define HV_PTE_PAGE                  (__HV_PTE_ONE << HV_PTE_INDEX_PAGE)
+
+/** Is this a global (non-ASID) mapping?
+ *
+ * If this bit is set, the translations established by this PTE will
+ * not be flushed from the TLB by the hv_flush_asid() service; they
+ * will be flushed by the hv_flush_page() or hv_flush_pages() services.
+ *
+ * Setting this bit for translations which are identical in all page
+ * tables (for instance, code and data belonging to a client OS) can
+ * be very beneficial, as it will reduce the number of TLB misses.
+ * Note that, while it is not an error which will be detected by the
+ * hypervisor, it is an extremely bad idea to set this bit for
+ * translations which are _not_ identical in all page tables.
+ *
+ * This bit should not be modified by the client while PRESENT is set, as
+ * doing so may race with the hypervisor's update of ACCESSED and DIRTY bits.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_GLOBAL                (__HV_PTE_ONE << HV_PTE_INDEX_GLOBAL)
+
+/** Is this mapping accessible to users?
+ *
+ * If this bit is set, code running at any PL will be permitted to
+ * access the virtual addresses mapped by this PTE.  Otherwise, only
+ * code running at PL 1 or above will be allowed to do so.
+ *
+ * This bit should not be modified by the client while PRESENT is set, as
+ * doing so may race with the hypervisor's update of ACCESSED and DIRTY bits.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_USER                  (__HV_PTE_ONE << HV_PTE_INDEX_USER)
+
+/** Has this mapping been accessed?
+ *
+ * This bit is set by the hypervisor when the memory described by the
+ * translation is accessed for the first time.  It is never cleared by
+ * the hypervisor, but may be cleared by the client.  After the bit
+ * has been cleared, subsequent references are not guaranteed to set
+ * it again until the translation has been flushed from the TLB.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_ACCESSED              (__HV_PTE_ONE << HV_PTE_INDEX_ACCESSED)
+
+/** Is this mapping dirty?
+ *
+ * This bit is set by the hypervisor when the memory described by the
+ * translation is written for the first time.  It is never cleared by
+ * the hypervisor, but may be cleared by the client.  After the bit
+ * has been cleared, subsequent references are not guaranteed to set
+ * it again until the translation has been flushed from the TLB.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_DIRTY                 (__HV_PTE_ONE << HV_PTE_INDEX_DIRTY)
+
+/** Migrating bit in PTE.
+ *
+ * This bit is guaranteed not to be inspected or modified by the
+ * hypervisor.  The name is indicative of the suggested use by the client
+ * to tag pages whose L3 cache is being migrated from one cpu to another.
+ */
+#define HV_PTE_MIGRATING             (__HV_PTE_ONE << HV_PTE_INDEX_MIGRATING)
+
+/** Client-private bit in PTE.
+ *
+ * This bit is guaranteed not to be inspected or modified by the
+ * hypervisor.
+ */
+#define HV_PTE_CLIENT0               (__HV_PTE_ONE << HV_PTE_INDEX_CLIENT0)
+
+/** Client-private bit in PTE.
+ *
+ * This bit is guaranteed not to be inspected or modified by the
+ * hypervisor.
+ */
+#define HV_PTE_CLIENT1               (__HV_PTE_ONE << HV_PTE_INDEX_CLIENT1)
+
+/** Non-coherent (NC) bit in PTE.
+ *
+ * If this bit is set, the mapping that is set up will be non-coherent
+ * (also known as non-inclusive).  This means that changes to the L3
+ * cache will not cause a local copy to be invalidated.  It is generally
+ * recommended only for read-only mappings.
+ *
+ * In level-1 PTEs, if the Page bit is clear, this bit determines how the
+ * level-2 page table is accessed.
+ */
+#define HV_PTE_NC                    (__HV_PTE_ONE << HV_PTE_INDEX_NC)
+
+/** Is this page prevented from filling the L1$?
+ *
+ * If this bit is set, the page described by the PTE will not be cached
+ * the local cpu's L1 cache.
+ *
+ * If CHIP_HAS_NC_AND_NOALLOC_BITS() is not true in <chip.h> for this chip,
+ * it is illegal to use this attribute, and may cause client termination.
+ *
+ * In level-1 PTEs, if the Page bit is clear, this bit
+ * determines how the level-2 page table is accessed.
+ */
+#define HV_PTE_NO_ALLOC_L1           (__HV_PTE_ONE << HV_PTE_INDEX_NO_ALLOC_L1)
+
+/** Is this page prevented from filling the L2$?
+ *
+ * If this bit is set, the page described by the PTE will not be cached
+ * the local cpu's L2 cache.
+ *
+ * If CHIP_HAS_NC_AND_NOALLOC_BITS() is not true in <chip.h> for this chip,
+ * it is illegal to use this attribute, and may cause client termination.
+ *
+ * In level-1 PTEs, if the Page bit is clear, this bit determines how the
+ * level-2 page table is accessed.
+ */
+#define HV_PTE_NO_ALLOC_L2           (__HV_PTE_ONE << HV_PTE_INDEX_NO_ALLOC_L2)
+
+/** Is this a priority page?
+ *
+ * If this bit is set, the page described by the PTE will be given
+ * priority in the cache.  Normally this translates into allowing the
+ * page to use only the "red" half of the cache.  The client may wish to
+ * then use the hv_set_caching service to specify that other pages which
+ * alias this page will use only the "black" half of the cache.
+ *
+ * If the Cached Priority bit is clear, the hypervisor uses the
+ * current hv_set_caching() value to choose how to cache the page.
+ *
+ * It is illegal to set the Cached Priority bit if the Non-Cached bit
+ * is set and the Cached Remotely bit is clear, i.e. if requests to
+ * the page map directly to memory.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_CACHED_PRIORITY       (__HV_PTE_ONE << \
+                                      HV_PTE_INDEX_CACHED_PRIORITY)
+
+/** Is this a readable mapping?
+ *
+ * If this bit is set, code will be permitted to read from (e.g.,
+ * issue load instructions against) the virtual addresses mapped by
+ * this PTE.
+ *
+ * It is illegal for this bit to be clear if the Writable bit is set.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_READABLE              (__HV_PTE_ONE << HV_PTE_INDEX_READABLE)
+
+/** Is this a writable mapping?
+ *
+ * If this bit is set, code will be permitted to write to (e.g., issue
+ * store instructions against) the virtual addresses mapped by this
+ * PTE.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_WRITABLE              (__HV_PTE_ONE << HV_PTE_INDEX_WRITABLE)
+
+/** Is this an executable mapping?
+ *
+ * If this bit is set, code will be permitted to execute from
+ * (e.g., jump to) the virtual addresses mapped by this PTE.
+ *
+ * This bit applies to any processor on the tile, if there are more
+ * than one.
+ *
+ * This bit is ignored in level-1 PTEs unless the Page bit is set.
+ */
+#define HV_PTE_EXECUTABLE            (__HV_PTE_ONE << HV_PTE_INDEX_EXECUTABLE)
+
+/** The width of a LOTAR's x or y bitfield. */
+#define HV_LOTAR_WIDTH 11
+
+/** Converts an x,y pair to a LOTAR value. */
+#define HV_XY_TO_LOTAR(x, y) ((HV_LOTAR)(((x) << HV_LOTAR_WIDTH) | (y)))
+
+/** Extracts the X component of a lotar. */
+#define HV_LOTAR_X(lotar) ((lotar) >> HV_LOTAR_WIDTH)
+
+/** Extracts the Y component of a lotar. */
+#define HV_LOTAR_Y(lotar) ((lotar) & ((1 << HV_LOTAR_WIDTH) - 1))
+
+#ifndef __ASSEMBLER__
+
+/** Define accessor functions for a PTE bit. */
+#define _HV_BIT(name, bit)                                      \
+static __inline int                                             \
+hv_pte_get_##name(HV_PTE pte)                                   \
+{                                                               \
+  return (pte.val >> HV_PTE_INDEX_##bit) & 1;                   \
+}                                                               \
+                                                                \
+static __inline HV_PTE                                          \
+hv_pte_set_##name(HV_PTE pte)                                   \
+{                                                               \
+  pte.val |= 1ULL << HV_PTE_INDEX_##bit;                        \
+  return pte;                                                   \
+}                                                               \
+                                                                \
+static __inline HV_PTE                                          \
+hv_pte_clear_##name(HV_PTE pte)                                 \
+{                                                               \
+  pte.val &= ~(1ULL << HV_PTE_INDEX_##bit);                     \
+  return pte;                                                   \
+}
+
+/* Generate accessors to get, set, and clear various PTE flags.
+ */
+_HV_BIT(present,         PRESENT)
+_HV_BIT(page,            PAGE)
+_HV_BIT(client0,         CLIENT0)
+_HV_BIT(client1,         CLIENT1)
+_HV_BIT(migrating,       MIGRATING)
+_HV_BIT(nc,              NC)
+_HV_BIT(readable,        READABLE)
+_HV_BIT(writable,        WRITABLE)
+_HV_BIT(executable,      EXECUTABLE)
+_HV_BIT(accessed,        ACCESSED)
+_HV_BIT(dirty,           DIRTY)
+_HV_BIT(no_alloc_l1,     NO_ALLOC_L1)
+_HV_BIT(no_alloc_l2,     NO_ALLOC_L2)
+_HV_BIT(cached_priority, CACHED_PRIORITY)
+_HV_BIT(global,          GLOBAL)
+_HV_BIT(user,            USER)
+
+#undef _HV_BIT
+
+/** Get the page mode from the PTE.
+ *
+ * This field generally determines whether and how accesses to the page
+ * are cached; the HV_PTE_MODE_xxx symbols define the legal values for the
+ * page mode.  The NC, NO_ALLOC_L1, and NO_ALLOC_L2 bits modify this
+ * general policy.
+ */
+static __inline unsigned int
+hv_pte_get_mode(const HV_PTE pte)
+{
+  return (((__hv32) pte.val) >> HV_PTE_INDEX_MODE) &
+         ((1 << HV_PTE_MODE_BITS) - 1);
+}
+
+/** Set the page mode into a PTE.  See hv_pte_get_mode. */
+static __inline HV_PTE
+hv_pte_set_mode(HV_PTE pte, unsigned int val)
+{
+  pte.val &= ~(((1ULL << HV_PTE_MODE_BITS) - 1) << HV_PTE_INDEX_MODE);
+  pte.val |= val << HV_PTE_INDEX_MODE;
+  return pte;
+}
+
+/** Get the page frame number from the PTE.
+ *
+ * This field contains the upper bits of the CPA (client physical
+ * address) of the target page; the complete CPA is this field with
+ * HV_LOG2_PAGE_SIZE_SMALL zero bits appended to it.
+ *
+ * For PTEs in a level-1 page table where the Page bit is set, the
+ * CPA must be aligned modulo the large page size.
+ */
+static __inline unsigned int
+hv_pte_get_pfn(const HV_PTE pte)
+{
+  return pte.val >> HV_PTE_INDEX_PFN;
+}
+
+
+/** Set the page frame number into a PTE.  See hv_pte_get_pfn. */
+static __inline HV_PTE
+hv_pte_set_pfn(HV_PTE pte, unsigned int val)
+{
+  /*
+   * Note that the use of "PTFN" in the next line is intentional; we
+   * don't want any garbage lower bits left in that field.
+   */
+  pte.val &= ~(((1ULL << HV_PTE_PTFN_BITS) - 1) << HV_PTE_INDEX_PTFN);
+  pte.val |= (__hv64) val << HV_PTE_INDEX_PFN;
+  return pte;
+}
+
+/** Get the page table frame number from the PTE.
+ *
+ * This field contains the upper bits of the CPA (client physical
+ * address) of the target page table; the complete CPA is this field with
+ * with HV_PAGE_TABLE_ALIGN zero bits appended to it.
+ *
+ * For PTEs in a level-1 page table when the Page bit is not set, the
+ * CPA must be aligned modulo the sticter of HV_PAGE_TABLE_ALIGN and
+ * the level-2 page table size.
+ */
+static __inline unsigned long
+hv_pte_get_ptfn(const HV_PTE pte)
+{
+  return pte.val >> HV_PTE_INDEX_PTFN;
+}
+
+
+/** Set the page table frame number into a PTE.  See hv_pte_get_ptfn. */
+static __inline HV_PTE
+hv_pte_set_ptfn(HV_PTE pte, unsigned long val)
+{
+  pte.val &= ~(((1ULL << HV_PTE_PTFN_BITS)-1) << HV_PTE_INDEX_PTFN);
+  pte.val |= (__hv64) val << HV_PTE_INDEX_PTFN;
+  return pte;
+}
+
+
+/** Get the remote tile caching this page.
+ *
+ * Specifies the remote tile which is providing the L3 cache for this page.
+ *
+ * This field is ignored unless the page mode is HV_PTE_MODE_CACHE_TILE_L3.
+ *
+ * In level-1 PTEs, if the Page bit is clear, this field determines how the
+ * level-2 page table is accessed.
+ */
+static __inline unsigned int
+hv_pte_get_lotar(const HV_PTE pte)
+{
+  unsigned int lotar = ((__hv32) pte.val) >> HV_PTE_INDEX_LOTAR;
+
+  return HV_XY_TO_LOTAR( (lotar >> (HV_PTE_LOTAR_BITS / 2)),
+                         (lotar & ((1 << (HV_PTE_LOTAR_BITS / 2)) - 1)) );
+}
+
+
+/** Set the remote tile caching a page into a PTE.  See hv_pte_get_lotar. */
+static __inline HV_PTE
+hv_pte_set_lotar(HV_PTE pte, unsigned int val)
+{
+  unsigned int x = HV_LOTAR_X(val);
+  unsigned int y = HV_LOTAR_Y(val);
+
+  pte.val &= ~(((1ULL << HV_PTE_LOTAR_BITS)-1) << HV_PTE_INDEX_LOTAR);
+  pte.val |= (x << (HV_PTE_INDEX_LOTAR + HV_PTE_LOTAR_BITS / 2)) |
+             (y << HV_PTE_INDEX_LOTAR);
+  return pte;
+}
+
+#endif  /* !__ASSEMBLER__ */
+
+/** Converts a client physical address to a pfn. */
+#define HV_CPA_TO_PFN(p) ((p) >> HV_LOG2_PAGE_SIZE_SMALL)
+
+/** Converts a pfn to a client physical address. */
+#define HV_PFN_TO_CPA(p) (((HV_PhysAddr)(p)) << HV_LOG2_PAGE_SIZE_SMALL)
+
+/** Converts a client physical address to a ptfn. */
+#define HV_CPA_TO_PTFN(p) ((p) >> HV_LOG2_PAGE_TABLE_ALIGN)
+
+/** Converts a ptfn to a client physical address. */
+#define HV_PTFN_TO_CPA(p) (((HV_PhysAddr)(p)) << HV_LOG2_PAGE_TABLE_ALIGN)
+
+/** Converts a ptfn to a pfn. */
+#define HV_PTFN_TO_PFN(p) \
+  ((p) >> (HV_LOG2_PAGE_SIZE_SMALL - HV_LOG2_PAGE_TABLE_ALIGN))
+
+/** Converts a pfn to a ptfn. */
+#define HV_PFN_TO_PTFN(p) \
+  ((p) << (HV_LOG2_PAGE_SIZE_SMALL - HV_LOG2_PAGE_TABLE_ALIGN))
+
+#if CHIP_VA_WIDTH() > 32
+
+/** Log number of HV_PTE entries in L0 page table */
+#define HV_LOG2_L0_ENTRIES (CHIP_VA_WIDTH() - HV_LOG2_L1_SPAN)
+
+/** Number of HV_PTE entries in L0 page table */
+#define HV_L0_ENTRIES (1 << HV_LOG2_L0_ENTRIES)
+
+/** Log size of L0 page table in bytes */
+#define HV_LOG2_L0_SIZE (HV_LOG2_PTE_SIZE + HV_LOG2_L0_ENTRIES)
+
+/** Size of L0 page table in bytes */
+#define HV_L0_SIZE (1 << HV_LOG2_L0_SIZE)
+
+#ifdef __ASSEMBLER__
+
+/** Index in L0 for a specific VA */
+#define HV_L0_INDEX(va) \
+  (((va) >> HV_LOG2_L1_SPAN) & (HV_L0_ENTRIES - 1))
+
+#else
+
+/** Index in L1 for a specific VA */
+#define HV_L0_INDEX(va) \
+  (((HV_VirtAddr)(va) >> HV_LOG2_L1_SPAN) & (HV_L0_ENTRIES - 1))
+
+#endif
+
+#endif /* CHIP_VA_WIDTH() > 32 */
+
+/** Log number of HV_PTE entries in L1 page table */
+#define HV_LOG2_L1_ENTRIES (HV_LOG2_L1_SPAN - HV_LOG2_PAGE_SIZE_LARGE)
+
+/** Number of HV_PTE entries in L1 page table */
+#define HV_L1_ENTRIES (1 << HV_LOG2_L1_ENTRIES)
+
+/** Log size of L1 page table in bytes */
+#define HV_LOG2_L1_SIZE (HV_LOG2_PTE_SIZE + HV_LOG2_L1_ENTRIES)
+
+/** Size of L1 page table in bytes */
+#define HV_L1_SIZE (1 << HV_LOG2_L1_SIZE)
+
+/** Log number of HV_PTE entries in level-2 page table */
+#define HV_LOG2_L2_ENTRIES (HV_LOG2_PAGE_SIZE_LARGE - HV_LOG2_PAGE_SIZE_SMALL)
+
+/** Number of HV_PTE entries in level-2 page table */
+#define HV_L2_ENTRIES (1 << HV_LOG2_L2_ENTRIES)
+
+/** Log size of level-2 page table in bytes */
+#define HV_LOG2_L2_SIZE (HV_LOG2_PTE_SIZE + HV_LOG2_L2_ENTRIES)
+
+/** Size of level-2 page table in bytes */
+#define HV_L2_SIZE (1 << HV_LOG2_L2_SIZE)
+
+#ifdef __ASSEMBLER__
+
+#if CHIP_VA_WIDTH() > 32
+
+/** Index in L1 for a specific VA */
+#define HV_L1_INDEX(va) \
+  (((va) >> HV_LOG2_PAGE_SIZE_LARGE) & (HV_L1_ENTRIES - 1))
+
+#else /* CHIP_VA_WIDTH() > 32 */
+
+/** Index in L1 for a specific VA */
+#define HV_L1_INDEX(va) \
+  (((va) >> HV_LOG2_PAGE_SIZE_LARGE))
+
+#endif /* CHIP_VA_WIDTH() > 32 */
+
+/** Index in level-2 page table for a specific VA */
+#define HV_L2_INDEX(va) \
+  (((va) >> HV_LOG2_PAGE_SIZE_SMALL) & (HV_L2_ENTRIES - 1))
+
+#else /* __ASSEMBLER __ */
+
+#if CHIP_VA_WIDTH() > 32
+
+/** Index in L1 for a specific VA */
+#define HV_L1_INDEX(va) \
+  (((HV_VirtAddr)(va) >> HV_LOG2_PAGE_SIZE_LARGE) & (HV_L1_ENTRIES - 1))
+
+#else /* CHIP_VA_WIDTH() > 32 */
+
+/** Index in L1 for a specific VA */
+#define HV_L1_INDEX(va) \
+  (((HV_VirtAddr)(va) >> HV_LOG2_PAGE_SIZE_LARGE))
+
+#endif /* CHIP_VA_WIDTH() > 32 */
+
+/** Index in level-2 page table for a specific VA */
+#define HV_L2_INDEX(va) \
+  (((HV_VirtAddr)(va) >> HV_LOG2_PAGE_SIZE_SMALL) & (HV_L2_ENTRIES - 1))
+
+#endif /* __ASSEMBLER __ */
+
+#endif /* _TILE_HV_H */
diff --git a/arch/tile/include/hv/pagesize.h b/arch/tile/include/hv/pagesize.h
new file mode 100644
index 000000000000..58bed114fedd
--- /dev/null
+++ b/arch/tile/include/hv/pagesize.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file pagesize.h
+ */
+
+#ifndef _HV_PAGESIZE_H
+#define _HV_PAGESIZE_H
+
+/** The log2 of the size of small pages, in bytes. This value should
+ * be verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL).
+ */
+#define HV_LOG2_PAGE_SIZE_SMALL 16
+
+/** The log2 of the size of large pages, in bytes. This value should be
+ * verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE).
+ */
+#define HV_LOG2_PAGE_SIZE_LARGE 24
+
+#endif /* _HV_PAGESIZE_H */
diff --git a/arch/tile/include/hv/syscall_public.h b/arch/tile/include/hv/syscall_public.h
new file mode 100644
index 000000000000..9cc0837e69fd
--- /dev/null
+++ b/arch/tile/include/hv/syscall_public.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file syscall.h
+ * Indices for the hypervisor system calls that are intended to be called
+ * directly, rather than only through hypervisor-generated "glue" code.
+ */
+
+#ifndef _SYS_HV_INCLUDE_SYSCALL_PUBLIC_H
+#define _SYS_HV_INCLUDE_SYSCALL_PUBLIC_H
+
+/** Fast syscall flag bit location.  When this bit is set, the hypervisor
+ *  handles the syscall specially.
+ */
+#define HV_SYS_FAST_SHIFT                 14
+
+/** Fast syscall flag bit mask. */
+#define HV_SYS_FAST_MASK                  (1 << HV_SYS_FAST_SHIFT)
+
+/** Bit location for flagging fast syscalls that can be called from PL0. */
+#define HV_SYS_FAST_PLO_SHIFT             13
+
+/** Fast syscall allowing PL0 bit mask. */
+#define HV_SYS_FAST_PL0_MASK              (1 << HV_SYS_FAST_PLO_SHIFT)
+
+/** Perform an MF that waits for all victims to reach DRAM. */
+#define HV_SYS_fence_incoherent         (51 | HV_SYS_FAST_MASK \
+                                       | HV_SYS_FAST_PL0_MASK)
+
+#endif /* !_SYS_HV_INCLUDE_SYSCALL_PUBLIC_H */
diff --git a/arch/tile/kernel/Makefile b/arch/tile/kernel/Makefile
new file mode 100644
index 000000000000..112b1e248f05
--- /dev/null
+++ b/arch/tile/kernel/Makefile
@@ -0,0 +1,17 @@
+#
+# Makefile for the Linux/TILE kernel.
+#
+
+extra-y := vmlinux.lds head_$(BITS).o
+obj-y := backtrace.o entry.o init_task.o irq.o messaging.o \
+        pci-dma.o proc.o process.o ptrace.o reboot.o \
+        setup.o signal.o single_step.o stack.o sys.o time.o traps.o \
+        intvec_$(BITS).o regs_$(BITS).o tile-desc_$(BITS).o
+
+obj-$(CONFIG_HARDWALL)          += hardwall.o
+obj-$(CONFIG_TILEGX)            += futex_64.o
+obj-$(CONFIG_COMPAT)            += compat.o compat_signal.o
+obj-$(CONFIG_SMP)               += smpboot.o smp.o tlb.o
+obj-$(CONFIG_MODULES)           += module.o
+obj-$(CONFIG_EARLY_PRINTK)      += early_printk.o
+obj-$(CONFIG_KEXEC)             += machine_kexec.o relocate_kernel.o
diff --git a/arch/tile/kernel/asm-offsets.c b/arch/tile/kernel/asm-offsets.c
new file mode 100644
index 000000000000..01ddf19cc36d
--- /dev/null
+++ b/arch/tile/kernel/asm-offsets.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Generates definitions from c-type structures used by assembly sources.
+ */
+
+#include <linux/kbuild.h>
+#include <linux/thread_info.h>
+#include <linux/sched.h>
+#include <linux/hardirq.h>
+#include <linux/ptrace.h>
+#include <hv/hypervisor.h>
+
+/* Check for compatible compiler early in the build. */
+#ifdef CONFIG_TILEGX
+# ifndef __tilegx__
+#  error Can only build TILE-Gx configurations with tilegx compiler
+# endif
+# ifndef __LP64__
+#  error Must not specify -m32 when building the TILE-Gx kernel
+# endif
+#else
+# ifdef __tilegx__
+#  error Can not build TILEPro/TILE64 configurations with tilegx compiler
+# endif
+#endif
+
+void foo(void)
+{
+        DEFINE(SINGLESTEP_STATE_BUFFER_OFFSET, \
+               offsetof(struct single_step_state, buffer));
+        DEFINE(SINGLESTEP_STATE_FLAGS_OFFSET, \
+               offsetof(struct single_step_state, flags));
+        DEFINE(SINGLESTEP_STATE_ORIG_PC_OFFSET, \
+               offsetof(struct single_step_state, orig_pc));
+        DEFINE(SINGLESTEP_STATE_NEXT_PC_OFFSET, \
+               offsetof(struct single_step_state, next_pc));
+        DEFINE(SINGLESTEP_STATE_BRANCH_NEXT_PC_OFFSET, \
+               offsetof(struct single_step_state, branch_next_pc));
+        DEFINE(SINGLESTEP_STATE_UPDATE_VALUE_OFFSET, \
+               offsetof(struct single_step_state, update_value));
+
+        DEFINE(THREAD_INFO_TASK_OFFSET, \
+               offsetof(struct thread_info, task));
+        DEFINE(THREAD_INFO_FLAGS_OFFSET, \
+               offsetof(struct thread_info, flags));
+        DEFINE(THREAD_INFO_STATUS_OFFSET, \
+               offsetof(struct thread_info, status));
+        DEFINE(THREAD_INFO_HOMECACHE_CPU_OFFSET, \
+               offsetof(struct thread_info, homecache_cpu));
+        DEFINE(THREAD_INFO_STEP_STATE_OFFSET, \
+               offsetof(struct thread_info, step_state));
+
+        DEFINE(TASK_STRUCT_THREAD_KSP_OFFSET,
+               offsetof(struct task_struct, thread.ksp));
+        DEFINE(TASK_STRUCT_THREAD_PC_OFFSET,
+               offsetof(struct task_struct, thread.pc));
+
+        DEFINE(HV_TOPOLOGY_WIDTH_OFFSET, \
+               offsetof(HV_Topology, width));
+        DEFINE(HV_TOPOLOGY_HEIGHT_OFFSET, \
+               offsetof(HV_Topology, height));
+
+        DEFINE(IRQ_CPUSTAT_SYSCALL_COUNT_OFFSET, \
+               offsetof(irq_cpustat_t, irq_syscall_count));
+}
diff --git a/arch/tile/kernel/backtrace.c b/arch/tile/kernel/backtrace.c
new file mode 100644
index 000000000000..d3c41c1ff6bd
--- /dev/null
+++ b/arch/tile/kernel/backtrace.c
@@ -0,0 +1,682 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/backtrace.h>
+
+#include <arch/chip.h>
+
+#include <asm/opcode-tile.h>
+
+
+#define TREG_SP 54
+#define TREG_LR 55
+
+
+#if TILE_CHIP >= 10
+#define tile_bundle_bits tilegx_bundle_bits
+#define TILE_MAX_INSTRUCTIONS_PER_BUNDLE TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE
+#define TILE_BUNDLE_ALIGNMENT_IN_BYTES TILEGX_BUNDLE_ALIGNMENT_IN_BYTES
+#define tile_decoded_instruction tilegx_decoded_instruction
+#define tile_mnemonic tilegx_mnemonic
+#define parse_insn_tile parse_insn_tilegx
+#define TILE_OPC_IRET TILEGX_OPC_IRET
+#define TILE_OPC_ADDI TILEGX_OPC_ADDI
+#define TILE_OPC_ADDLI TILEGX_OPC_ADDLI
+#define TILE_OPC_INFO TILEGX_OPC_INFO
+#define TILE_OPC_INFOL TILEGX_OPC_INFOL
+#define TILE_OPC_JRP TILEGX_OPC_JRP
+#define TILE_OPC_MOVE TILEGX_OPC_MOVE
+#define OPCODE_STORE TILEGX_OPC_ST
+typedef long long bt_int_reg_t;
+#else
+#define OPCODE_STORE TILE_OPC_SW
+typedef int bt_int_reg_t;
+#endif
+
+/** A decoded bundle used for backtracer analysis. */
+struct BacktraceBundle {
+        tile_bundle_bits bits;
+        int num_insns;
+        struct tile_decoded_instruction
+        insns[TILE_MAX_INSTRUCTIONS_PER_BUNDLE];
+};
+
+
+/* This implementation only makes sense for native tools. */
+/** Default function to read memory. */
+static bool bt_read_memory(void *result, VirtualAddress addr,
+                           unsigned int size, void *extra)
+{
+        /* FIXME: this should do some horrible signal stuff to catch
+         * SEGV cleanly and fail.
+         *
+         * Or else the caller should do the setjmp for efficiency.
+         */
+
+        memcpy(result, (const void *)addr, size);
+        return true;
+}
+
+
+/** Locates an instruction inside the given bundle that
+ * has the specified mnemonic, and whose first 'num_operands_to_match'
+ * operands exactly match those in 'operand_values'.
+ */
+static const struct tile_decoded_instruction *find_matching_insn(
+        const struct BacktraceBundle *bundle,
+        tile_mnemonic mnemonic,
+        const int *operand_values,
+        int num_operands_to_match)
+{
+        int i, j;
+        bool match;
+
+        for (i = 0; i < bundle->num_insns; i++) {
+                const struct tile_decoded_instruction *insn =
+                        &bundle->insns[i];
+
+                if (insn->opcode->mnemonic != mnemonic)
+                        continue;
+
+                match = true;
+                for (j = 0; j < num_operands_to_match; j++) {
+                        if (operand_values[j] != insn->operand_values[j]) {
+                                match = false;
+                                break;
+                        }
+                }
+
+                if (match)
+                        return insn;
+        }
+
+        return NULL;
+}
+
+/** Does this bundle contain an 'iret' instruction? */
+static inline bool bt_has_iret(const struct BacktraceBundle *bundle)
+{
+        return find_matching_insn(bundle, TILE_OPC_IRET, NULL, 0) != NULL;
+}
+
+/** Does this bundle contain an 'addi sp, sp, OFFSET' or
+ * 'addli sp, sp, OFFSET' instruction, and if so, what is OFFSET?
+ */
+static bool bt_has_addi_sp(const struct BacktraceBundle *bundle, int *adjust)
+{
+        static const int vals[2] = { TREG_SP, TREG_SP };
+
+        const struct tile_decoded_instruction *insn =
+                find_matching_insn(bundle, TILE_OPC_ADDI, vals, 2);
+        if (insn == NULL)
+                insn = find_matching_insn(bundle, TILE_OPC_ADDLI, vals, 2);
+#if TILE_CHIP >= 10
+        if (insn == NULL)
+                insn = find_matching_insn(bundle, TILEGX_OPC_ADDXLI, vals, 2);
+        if (insn == NULL)
+                insn = find_matching_insn(bundle, TILEGX_OPC_ADDXI, vals, 2);
+#endif
+        if (insn == NULL)
+                return false;
+
+        *adjust = insn->operand_values[2];
+        return true;
+}
+
+/** Does this bundle contain any 'info OP' or 'infol OP'
+ * instruction, and if so, what are their OP?  Note that OP is interpreted
+ * as an unsigned value by this code since that's what the caller wants.
+ * Returns the number of info ops found.
+ */
+static int bt_get_info_ops(const struct BacktraceBundle *bundle,
+                int operands[MAX_INFO_OPS_PER_BUNDLE])
+{
+        int num_ops = 0;
+        int i;
+
+        for (i = 0; i < bundle->num_insns; i++) {
+                const struct tile_decoded_instruction *insn =
+                        &bundle->insns[i];
+
+                if (insn->opcode->mnemonic == TILE_OPC_INFO ||
+                    insn->opcode->mnemonic == TILE_OPC_INFOL) {
+                        operands[num_ops++] = insn->operand_values[0];
+                }
+        }
+
+        return num_ops;
+}
+
+/** Does this bundle contain a jrp instruction, and if so, to which
+ * register is it jumping?
+ */
+static bool bt_has_jrp(const struct BacktraceBundle *bundle, int *target_reg)
+{
+        const struct tile_decoded_instruction *insn =
+                find_matching_insn(bundle, TILE_OPC_JRP, NULL, 0);
+        if (insn == NULL)
+                return false;
+
+        *target_reg = insn->operand_values[0];
+        return true;
+}
+
+/** Does this bundle modify the specified register in any way? */
+static bool bt_modifies_reg(const struct BacktraceBundle *bundle, int reg)
+{
+        int i, j;
+        for (i = 0; i < bundle->num_insns; i++) {
+                const struct tile_decoded_instruction *insn =
+                        &bundle->insns[i];
+
+                if (insn->opcode->implicitly_written_register == reg)
+                        return true;
+
+                for (j = 0; j < insn->opcode->num_operands; j++)
+                        if (insn->operands[j]->is_dest_reg &&
+                            insn->operand_values[j] == reg)
+                                return true;
+        }
+
+        return false;
+}
+
+/** Does this bundle modify sp? */
+static inline bool bt_modifies_sp(const struct BacktraceBundle *bundle)
+{
+        return bt_modifies_reg(bundle, TREG_SP);
+}
+
+/** Does this bundle modify lr? */
+static inline bool bt_modifies_lr(const struct BacktraceBundle *bundle)
+{
+        return bt_modifies_reg(bundle, TREG_LR);
+}
+
+/** Does this bundle contain the instruction 'move fp, sp'? */
+static inline bool bt_has_move_r52_sp(const struct BacktraceBundle *bundle)
+{
+        static const int vals[2] = { 52, TREG_SP };
+        return find_matching_insn(bundle, TILE_OPC_MOVE, vals, 2) != NULL;
+}
+
+/** Does this bundle contain a store of lr to sp? */
+static inline bool bt_has_sw_sp_lr(const struct BacktraceBundle *bundle)
+{
+        static const int vals[2] = { TREG_SP, TREG_LR };
+        return find_matching_insn(bundle, OPCODE_STORE, vals, 2) != NULL;
+}
+
+#if TILE_CHIP >= 10
+/** Track moveli values placed into registers. */
+static inline void bt_update_moveli(const struct BacktraceBundle *bundle,
+                                    int moveli_args[])
+{
+        int i;
+        for (i = 0; i < bundle->num_insns; i++) {
+                const struct tile_decoded_instruction *insn =
+                        &bundle->insns[i];
+
+                if (insn->opcode->mnemonic == TILEGX_OPC_MOVELI) {
+                        int reg = insn->operand_values[0];
+                        moveli_args[reg] = insn->operand_values[1];
+                }
+        }
+}
+
+/** Does this bundle contain an 'add sp, sp, reg' instruction
+ * from a register that we saw a moveli into, and if so, what
+ * is the value in the register?
+ */
+static bool bt_has_add_sp(const struct BacktraceBundle *bundle, int *adjust,
+                          int moveli_args[])
+{
+        static const int vals[2] = { TREG_SP, TREG_SP };
+
+        const struct tile_decoded_instruction *insn =
+                find_matching_insn(bundle, TILEGX_OPC_ADDX, vals, 2);
+        if (insn) {
+                int reg = insn->operand_values[2];
+                if (moveli_args[reg]) {
+                        *adjust = moveli_args[reg];
+                        return true;
+                }
+        }
+        return false;
+}
+#endif
+
+/** Locates the caller's PC and SP for a program starting at the
+ * given address.
+ */
+static void find_caller_pc_and_caller_sp(CallerLocation *location,
+                                         const VirtualAddress start_pc,
+                                         BacktraceMemoryReader read_memory_func,
+                                         void *read_memory_func_extra)
+{
+        /* Have we explicitly decided what the sp is,
+         * rather than just the default?
+         */
+        bool sp_determined = false;
+
+        /* Has any bundle seen so far modified lr? */
+        bool lr_modified = false;
+
+        /* Have we seen a move from sp to fp? */
+        bool sp_moved_to_r52 = false;
+
+        /* Have we seen a terminating bundle? */
+        bool seen_terminating_bundle = false;
+
+        /* Cut down on round-trip reading overhead by reading several
+         * bundles at a time.
+         */
+        tile_bundle_bits prefetched_bundles[32];
+        int num_bundles_prefetched = 0;
+        int next_bundle = 0;
+        VirtualAddress pc;
+
+#if TILE_CHIP >= 10
+        /* Naively try to track moveli values to support addx for -m32. */
+        int moveli_args[TILEGX_NUM_REGISTERS] = { 0 };
+#endif
+
+        /* Default to assuming that the caller's sp is the current sp.
+         * This is necessary to handle the case where we start backtracing
+         * right at the end of the epilog.
+         */
+        location->sp_location = SP_LOC_OFFSET;
+        location->sp_offset = 0;
+
+        /* Default to having no idea where the caller PC is. */
+        location->pc_location = PC_LOC_UNKNOWN;
+
+        /* Don't even try if the PC is not aligned. */
+        if (start_pc % TILE_BUNDLE_ALIGNMENT_IN_BYTES != 0)
+                return;
+
+        for (pc = start_pc;; pc += sizeof(tile_bundle_bits)) {
+
+                struct BacktraceBundle bundle;
+                int num_info_ops, info_operands[MAX_INFO_OPS_PER_BUNDLE];
+                int one_ago, jrp_reg;
+                bool has_jrp;
+
+                if (next_bundle >= num_bundles_prefetched) {
+                        /* Prefetch some bytes, but don't cross a page
+                         * boundary since that might cause a read failure we
+                         * don't care about if we only need the first few
+                         * bytes. Note: we don't care what the actual page
+                         * size is; using the minimum possible page size will
+                         * prevent any problems.
+                         */
+                        unsigned int bytes_to_prefetch = 4096 - (pc & 4095);
+                        if (bytes_to_prefetch > sizeof prefetched_bundles)
+                                bytes_to_prefetch = sizeof prefetched_bundles;
+
+                        if (!read_memory_func(prefetched_bundles, pc,
+                                              bytes_to_prefetch,
+                                              read_memory_func_extra)) {
+                                if (pc == start_pc) {
+                                        /* The program probably called a bad
+                                         * address, such as a NULL pointer.
+                                         * So treat this as if we are at the
+                                         * start of the function prolog so the
+                                         * backtrace will show how we got here.
+                                         */
+                                        location->pc_location = PC_LOC_IN_LR;
+                                        return;
+                                }
+
+                                /* Unreadable address. Give up. */
+                                break;
+                        }
+
+                        next_bundle = 0;
+                        num_bundles_prefetched =
+                                bytes_to_prefetch / sizeof(tile_bundle_bits);
+                }
+
+                /* Decode the next bundle. */
+                bundle.bits = prefetched_bundles[next_bundle++];
+                bundle.num_insns =
+                        parse_insn_tile(bundle.bits, pc, bundle.insns);
+                num_info_ops = bt_get_info_ops(&bundle, info_operands);
+
+                /* First look at any one_ago info ops if they are interesting,
+                 * since they should shadow any non-one-ago info ops.
+                 */
+                for (one_ago = (pc != start_pc) ? 1 : 0;
+                     one_ago >= 0; one_ago--) {
+                        int i;
+                        for (i = 0; i < num_info_ops; i++) {
+                                int info_operand = info_operands[i];
+                                if (info_operand < CALLER_UNKNOWN_BASE) {
+                                        /* Weird; reserved value, ignore it. */
+                                        continue;
+                                }
+
+                                /* Skip info ops which are not in the
+                                 * "one_ago" mode we want right now.
+                                 */
+                                if (((info_operand & ONE_BUNDLE_AGO_FLAG) != 0)
+                                    != (one_ago != 0))
+                                        continue;
+
+                                /* Clear the flag to make later checking
+                                 * easier. */
+                                info_operand &= ~ONE_BUNDLE_AGO_FLAG;
+
+                                /* Default to looking at PC_IN_LR_FLAG. */
+                                if (info_operand & PC_IN_LR_FLAG)
+                                        location->pc_location =
+                                                PC_LOC_IN_LR;
+                                else
+                                        location->pc_location =
+                                                PC_LOC_ON_STACK;
+
+                                switch (info_operand) {
+                                case CALLER_UNKNOWN_BASE:
+                                        location->pc_location = PC_LOC_UNKNOWN;
+                                        location->sp_location = SP_LOC_UNKNOWN;
+                                        return;
+
+                                case CALLER_SP_IN_R52_BASE:
+                                case CALLER_SP_IN_R52_BASE | PC_IN_LR_FLAG:
+                                        location->sp_location = SP_LOC_IN_R52;
+                                        return;
+
+                                default:
+                                {
+                                        const unsigned int val = info_operand
+                                                - CALLER_SP_OFFSET_BASE;
+                                        const unsigned int sp_offset =
+                                                (val >> NUM_INFO_OP_FLAGS) * 8;
+                                        if (sp_offset < 32768) {
+                                                /* This is a properly encoded
+                                                 * SP offset. */
+                                                location->sp_location =
+                                                        SP_LOC_OFFSET;
+                                                location->sp_offset =
+                                                        sp_offset;
+                                                return;
+                                        } else {
+                                                /* This looked like an SP
+                                                 * offset, but it's outside
+                                                 * the legal range, so this
+                                                 * must be an unrecognized
+                                                 * info operand.  Ignore it.
+                                                 */
+                                        }
+                                }
+                                break;
+                                }
+                        }
+                }
+
+                if (seen_terminating_bundle) {
+                        /* We saw a terminating bundle during the previous
+                         * iteration, so we were only looking for an info op.
+                         */
+                        break;
+                }
+
+                if (bundle.bits == 0) {
+                        /* Wacky terminating bundle. Stop looping, and hope
+                         * we've already seen enough to find the caller.
+                         */
+                        break;
+                }
+
+                /*
+                 * Try to determine caller's SP.
+                 */
+
+                if (!sp_determined) {
+                        int adjust;
+                        if (bt_has_addi_sp(&bundle, &adjust)
+#if TILE_CHIP >= 10
+                            || bt_has_add_sp(&bundle, &adjust, moveli_args)
+#endif
+                                ) {
+                                location->sp_location = SP_LOC_OFFSET;
+
+                                if (adjust <= 0) {
+                                        /* We are in prolog about to adjust
+                                         * SP. */
+                                        location->sp_offset = 0;
+                                } else {
+                                        /* We are in epilog restoring SP. */
+                                        location->sp_offset = adjust;
+                                }
+
+                                sp_determined = true;
+                        } else {
+                                if (bt_has_move_r52_sp(&bundle)) {
+                                        /* Maybe in prolog, creating an
+                                         * alloca-style frame.  But maybe in
+                                         * the middle of a fixed-size frame
+                                         * clobbering r52 with SP.
+                                         */
+                                        sp_moved_to_r52 = true;
+                                }
+
+                                if (bt_modifies_sp(&bundle)) {
+                                        if (sp_moved_to_r52) {
+                                                /* We saw SP get saved into
+                                                 * r52 earlier (or now), which
+                                                 * must have been in the
+                                                 * prolog, so we now know that
+                                                 * SP is still holding the
+                                                 * caller's sp value.
+                                                 */
+                                                location->sp_location =
+                                                        SP_LOC_OFFSET;
+                                                location->sp_offset = 0;
+                                        } else {
+                                                /* Someone must have saved
+                                                 * aside the caller's SP value
+                                                 * into r52, so r52 holds the
+                                                 * current value.
+                                                 */
+                                                location->sp_location =
+                                                        SP_LOC_IN_R52;
+                                        }
+                                        sp_determined = true;
+                                }
+                        }
+
+#if TILE_CHIP >= 10
+                        /* Track moveli arguments for -m32 mode. */
+                        bt_update_moveli(&bundle, moveli_args);
+#endif
+                }
+
+                if (bt_has_iret(&bundle)) {
+                        /* This is a terminating bundle. */
+                        seen_terminating_bundle = true;
+                        continue;
+                }
+
+                /*
+                 * Try to determine caller's PC.
+                 */
+
+                jrp_reg = -1;
+                has_jrp = bt_has_jrp(&bundle, &jrp_reg);
+                if (has_jrp)
+                        seen_terminating_bundle = true;
+
+                if (location->pc_location == PC_LOC_UNKNOWN) {
+                        if (has_jrp) {
+                                if (jrp_reg == TREG_LR && !lr_modified) {
+                                        /* Looks like a leaf function, or else
+                                         * lr is already restored. */
+                                        location->pc_location =
+                                                PC_LOC_IN_LR;
+                                } else {
+                                        location->pc_location =
+                                                PC_LOC_ON_STACK;
+                                }
+                        } else if (bt_has_sw_sp_lr(&bundle)) {
+                                /* In prolog, spilling initial lr to stack. */
+                                location->pc_location = PC_LOC_IN_LR;
+                        } else if (bt_modifies_lr(&bundle)) {
+                                lr_modified = true;
+                        }
+                }
+        }
+}
+
+void backtrace_init(BacktraceIterator *state,
+                    BacktraceMemoryReader read_memory_func,
+                    void *read_memory_func_extra,
+                    VirtualAddress pc, VirtualAddress lr,
+                    VirtualAddress sp, VirtualAddress r52)
+{
+        CallerLocation location;
+        VirtualAddress fp, initial_frame_caller_pc;
+
+        if (read_memory_func == NULL) {
+                read_memory_func = bt_read_memory;
+        }
+
+        /* Find out where we are in the initial frame. */
+        find_caller_pc_and_caller_sp(&location, pc,
+                                     read_memory_func, read_memory_func_extra);
+
+        switch (location.sp_location) {
+        case SP_LOC_UNKNOWN:
+                /* Give up. */
+                fp = -1;
+                break;
+
+        case SP_LOC_IN_R52:
+                fp = r52;
+                break;
+
+        case SP_LOC_OFFSET:
+                fp = sp + location.sp_offset;
+                break;
+
+        default:
+                /* Give up. */
+                fp = -1;
+                break;
+        }
+
+        /* If the frame pointer is not aligned to the basic word size
+         * something terrible happened and we should mark it as invalid.
+         */
+        if (fp % sizeof(bt_int_reg_t) != 0)
+                fp = -1;
+
+        /* -1 means "don't know initial_frame_caller_pc". */
+        initial_frame_caller_pc = -1;
+
+        switch (location.pc_location) {
+        case PC_LOC_UNKNOWN:
+                /* Give up. */
+                fp = -1;
+                break;
+
+        case PC_LOC_IN_LR:
+                if (lr == 0 || lr % TILE_BUNDLE_ALIGNMENT_IN_BYTES != 0) {
+                        /* Give up. */
+                        fp = -1;
+                } else {
+                        initial_frame_caller_pc = lr;
+                }
+                break;
+
+        case PC_LOC_ON_STACK:
+                /* Leave initial_frame_caller_pc as -1,
+                 * meaning check the stack.
+                 */
+                break;
+
+        default:
+                /* Give up. */
+                fp = -1;
+                break;
+        }
+
+        state->pc = pc;
+        state->sp = sp;
+        state->fp = fp;
+        state->initial_frame_caller_pc = initial_frame_caller_pc;
+        state->read_memory_func = read_memory_func;
+        state->read_memory_func_extra = read_memory_func_extra;
+}
+
+/* Handle the case where the register holds more bits than the VA. */
+static bool valid_addr_reg(bt_int_reg_t reg)
+{
+        return ((VirtualAddress)reg == reg);
+}
+
+bool backtrace_next(BacktraceIterator *state)
+{
+        VirtualAddress next_fp, next_pc;
+        bt_int_reg_t next_frame[2];
+
+        if (state->fp == -1) {
+                /* No parent frame. */
+                return false;
+        }
+
+        /* Try to read the frame linkage data chaining to the next function. */
+        if (!state->read_memory_func(&next_frame, state->fp, sizeof next_frame,
+                                     state->read_memory_func_extra)) {
+                return false;
+        }
+
+        next_fp = next_frame[1];
+        if (!valid_addr_reg(next_frame[1]) ||
+            next_fp % sizeof(bt_int_reg_t) != 0) {
+                /* Caller's frame pointer is suspect, so give up. */
+                return false;
+        }
+
+        if (state->initial_frame_caller_pc != -1) {
+                /* We must be in the initial stack frame and already know the
+                 * caller PC.
+                 */
+                next_pc = state->initial_frame_caller_pc;
+
+                /* Force reading stack next time, in case we were in the
+                 * initial frame.  We don't do this above just to paranoidly
+                 * avoid changing the struct at all when we return false.
+                 */
+                state->initial_frame_caller_pc = -1;
+        } else {
+                /* Get the caller PC from the frame linkage area. */
+                next_pc = next_frame[0];
+                if (!valid_addr_reg(next_frame[0]) || next_pc == 0 ||
+                    next_pc % TILE_BUNDLE_ALIGNMENT_IN_BYTES != 0) {
+                        /* The PC is suspect, so give up. */
+                        return false;
+                }
+        }
+
+        /* Update state to become the caller's stack frame. */
+        state->pc = next_pc;
+        state->sp = state->fp;
+        state->fp = next_fp;
+
+        return true;
+}
diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
new file mode 100644
index 000000000000..b1e06d041555
--- /dev/null
+++ b/arch/tile/kernel/compat.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/* Adjust unistd.h to provide 32-bit numbers and functions. */
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/msg.h>
+#include <linux/syscalls.h>
+#include <linux/kdev_t.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/smp_lock.h>
+#include <linux/uaccess.h>
+#include <linux/signal.h>
+#include <asm/syscalls.h>
+
+/*
+ * Syscalls that take 64-bit numbers traditionally take them in 32-bit
+ * "high" and "low" value parts on 32-bit architectures.
+ * In principle, one could imagine passing some register arguments as
+ * fully 64-bit on TILE-Gx in 32-bit mode, but it seems easier to
+ * adapt the usual convention.
+ */
+
+long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high)
+{
+        return sys_truncate(filename, ((loff_t)high << 32) | low);
+}
+
+long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high)
+{
+        return sys_ftruncate(fd, ((loff_t)high << 32) | low);
+}
+
+long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
+                        u32 dummy, u32 low, u32 high)
+{
+        return sys_pread64(fd, ubuf, count, ((loff_t)high << 32) | low);
+}
+
+long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
+                         u32 dummy, u32 low, u32 high)
+{
+        return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low);
+}
+
+long compat_sys_lookup_dcookie(u32 low, u32 high, char __user *buf, size_t len)
+{
+        return sys_lookup_dcookie(((loff_t)high << 32) | low, buf, len);
+}
+
+long compat_sys_sync_file_range2(int fd, unsigned int flags,
+                                 u32 offset_lo, u32 offset_hi,
+                                 u32 nbytes_lo, u32 nbytes_hi)
+{
+        return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo,
+                                   ((loff_t)nbytes_hi << 32) | nbytes_lo,
+                                   flags);
+}
+
+long compat_sys_fallocate(int fd, int mode,
+                          u32 offset_lo, u32 offset_hi,
+                          u32 len_lo, u32 len_hi)
+{
+        return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
+                             ((loff_t)len_hi << 32) | len_lo);
+}
+
+
+
+long compat_sys_sched_rr_get_interval(compat_pid_t pid,
+                                      struct compat_timespec __user *interval)
+{
+        struct timespec t;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs(KERNEL_DS);
+        ret = sys_sched_rr_get_interval(pid,
+                                        (struct timespec __force __user *)&t);
+        set_fs(old_fs);
+        if (put_compat_timespec(&t, interval))
+                return -EFAULT;
+        return ret;
+}
+
+/*
+ * The usual compat_sys_msgsnd() and _msgrcv() seem to be assuming
+ * some different calling convention than our normal 32-bit tile code.
+ */
+
+/* Already defined in ipc/compat.c, but we need it here. */
+struct compat_msgbuf {
+        compat_long_t mtype;
+        char mtext[1];
+};
+
+long tile_compat_sys_msgsnd(int msqid,
+                            struct compat_msgbuf __user *msgp,
+                            size_t msgsz, int msgflg)
+{
+        compat_long_t mtype;
+
+        if (get_user(mtype, &msgp->mtype))
+                return -EFAULT;
+        return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
+}
+
+long tile_compat_sys_msgrcv(int msqid,
+                            struct compat_msgbuf __user *msgp,
+                            size_t msgsz, long msgtyp, int msgflg)
+{
+        long err, mtype;
+
+        err =  do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
+        if (err < 0)
+                goto out;
+
+        if (put_user(mtype, &msgp->mtype))
+                err = -EFAULT;
+ out:
+        return err;
+}
+
+/* Provide the compat syscall number to call mapping. */
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (compat_##call),
+
+/* The generic versions of these don't work for Tile. */
+#define compat_sys_msgrcv tile_compat_sys_msgrcv
+#define compat_sys_msgsnd tile_compat_sys_msgsnd
+
+/* See comments in sys.c */
+#define compat_sys_fadvise64 sys32_fadvise64
+#define compat_sys_fadvise64_64 sys32_fadvise64_64
+#define compat_sys_readahead sys32_readahead
+#define compat_sys_sync_file_range compat_sys_sync_file_range2
+
+/* The native 64-bit "struct stat" matches the 32-bit "struct stat64". */
+#define compat_sys_stat64 sys_newstat
+#define compat_sys_lstat64 sys_newlstat
+#define compat_sys_fstat64 sys_newfstat
+#define compat_sys_fstatat64 sys_newfstatat
+
+/* Pass full 64-bit values through ptrace. */
+#define compat_sys_ptrace tile_compat_sys_ptrace
+
+/*
+ * Note that we can't include <linux/unistd.h> here since the header
+ * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
+ */
+void *compat_sys_call_table[__NR_syscalls] = {
+        [0 ... __NR_syscalls-1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
new file mode 100644
index 000000000000..9c710db43f13
--- /dev/null
+++ b/arch/tile/kernel/compat_signal.c
@@ -0,0 +1,437 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/suspend.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+#include <asm/processor.h>
+#include <asm/ucontext.h>
+#include <asm/sigframe.h>
+#include <asm/syscalls.h>
+#include <arch/interrupts.h>
+
+struct compat_sigaction {
+        compat_uptr_t sa_handler;
+        compat_ulong_t sa_flags;
+        compat_uptr_t sa_restorer;
+        sigset_t sa_mask __packed;
+};
+
+struct compat_sigaltstack {
+        compat_uptr_t ss_sp;
+        int ss_flags;
+        compat_size_t ss_size;
+};
+
+struct compat_ucontext {
+        compat_ulong_t    uc_flags;
+        compat_uptr_t     uc_link;
+        struct compat_sigaltstack         uc_stack;
+        struct sigcontext uc_mcontext;
+        sigset_t          uc_sigmask;   /* mask last for extensibility */
+};
+
+#define COMPAT_SI_PAD_SIZE      ((SI_MAX_SIZE - 3 * sizeof(int)) / sizeof(int))
+
+struct compat_siginfo {
+        int si_signo;
+        int si_errno;
+        int si_code;
+
+        union {
+                int _pad[COMPAT_SI_PAD_SIZE];
+
+                /* kill() */
+                struct {
+                        unsigned int _pid;      /* sender's pid */
+                        unsigned int _uid;      /* sender's uid */
+                } _kill;
+
+                /* POSIX.1b timers */
+                struct {
+                        compat_timer_t _tid;    /* timer id */
+                        int _overrun;           /* overrun count */
+                        compat_sigval_t _sigval;        /* same as below */
+                        int _sys_private;       /* not to be passed to user */
+                        int _overrun_incr;      /* amount to add to overrun */
+                } _timer;
+
+                /* POSIX.1b signals */
+                struct {
+                        unsigned int _pid;      /* sender's pid */
+                        unsigned int _uid;      /* sender's uid */
+                        compat_sigval_t _sigval;
+                } _rt;
+
+                /* SIGCHLD */
+                struct {
+                        unsigned int _pid;      /* which child */
+                        unsigned int _uid;      /* sender's uid */
+                        int _status;            /* exit code */
+                        compat_clock_t _utime;
+                        compat_clock_t _stime;
+                } _sigchld;
+
+                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+                struct {
+                        unsigned int _addr;     /* faulting insn/memory ref. */
+#ifdef __ARCH_SI_TRAPNO
+                        int _trapno;    /* TRAP # which caused the signal */
+#endif
+                } _sigfault;
+
+                /* SIGPOLL */
+                struct {
+                        int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
+                        int _fd;
+                } _sigpoll;
+        } _sifields;
+};
+
+struct compat_rt_sigframe {
+        unsigned char save_area[C_ABI_SAVE_AREA_SIZE]; /* caller save area */
+        struct compat_siginfo info;
+        struct compat_ucontext uc;
+};
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+long compat_sys_rt_sigaction(int sig, struct compat_sigaction __user *act,
+                             struct compat_sigaction __user *oact,
+                             size_t sigsetsize)
+{
+        struct k_sigaction new_sa, old_sa;
+        int ret = -EINVAL;
+
+        /* XXX: Don't preclude handling different sized sigset_t's.  */
+        if (sigsetsize != sizeof(sigset_t))
+                goto out;
+
+        if (act) {
+                compat_uptr_t handler, restorer;
+
+                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+                    __get_user(handler, &act->sa_handler) ||
+                    __get_user(new_sa.sa.sa_flags, &act->sa_flags) ||
+                    __get_user(restorer, &act->sa_restorer) ||
+                    __copy_from_user(&new_sa.sa.sa_mask, &act->sa_mask,
+                                     sizeof(sigset_t)))
+                        return -EFAULT;
+                new_sa.sa.sa_handler = compat_ptr(handler);
+                new_sa.sa.sa_restorer = compat_ptr(restorer);
+        }
+
+        ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
+
+        if (!ret && oact) {
+                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+                    __put_user(ptr_to_compat(old_sa.sa.sa_handler),
+                               &oact->sa_handler) ||
+                    __put_user(ptr_to_compat(old_sa.sa.sa_restorer),
+                               &oact->sa_restorer) ||
+                    __put_user(old_sa.sa.sa_flags, &oact->sa_flags) ||
+                    __copy_to_user(&oact->sa_mask, &old_sa.sa.sa_mask,
+                                   sizeof(sigset_t)))
+                        return -EFAULT;
+        }
+out:
+        return ret;
+}
+
+long compat_sys_rt_sigqueueinfo(int pid, int sig,
+                                struct compat_siginfo __user *uinfo)
+{
+        siginfo_t info;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+
+        if (copy_siginfo_from_user32(&info, uinfo))
+                return -EFAULT;
+        set_fs(KERNEL_DS);
+        ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *)&info);
+        set_fs(old_fs);
+        return ret;
+}
+
+int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from)
+{
+        int err;
+
+        if (!access_ok(VERIFY_WRITE, to, sizeof(struct compat_siginfo)))
+                return -EFAULT;
+
+        /* If you change siginfo_t structure, please make sure that
+           this code is fixed accordingly.
+           It should never copy any pad contained in the structure
+           to avoid security leaks, but must copy the generic
+           3 ints plus the relevant union member.  */
+        err = __put_user(from->si_signo, &to->si_signo);
+        err |= __put_user(from->si_errno, &to->si_errno);
+        err |= __put_user((short)from->si_code, &to->si_code);
+
+        if (from->si_code < 0) {
+                err |= __put_user(from->si_pid, &to->si_pid);
+                err |= __put_user(from->si_uid, &to->si_uid);
+                err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
+        } else {
+                /*
+                 * First 32bits of unions are always present:
+                 * si_pid === si_band === si_tid === si_addr(LS half)
+                 */
+                err |= __put_user(from->_sifields._pad[0],
+                                  &to->_sifields._pad[0]);
+                switch (from->si_code >> 16) {
+                case __SI_FAULT >> 16:
+                        break;
+                case __SI_CHLD >> 16:
+                        err |= __put_user(from->si_utime, &to->si_utime);
+                        err |= __put_user(from->si_stime, &to->si_stime);
+                        err |= __put_user(from->si_status, &to->si_status);
+                        /* FALL THROUGH */
+                default:
+                case __SI_KILL >> 16:
+                        err |= __put_user(from->si_uid, &to->si_uid);
+                        break;
+                case __SI_POLL >> 16:
+                        err |= __put_user(from->si_fd, &to->si_fd);
+                        break;
+                case __SI_TIMER >> 16:
+                        err |= __put_user(from->si_overrun, &to->si_overrun);
+                        err |= __put_user(ptr_to_compat(from->si_ptr),
+                                          &to->si_ptr);
+                        break;
+                         /* This is not generated by the kernel as of now.  */
+                case __SI_RT >> 16:
+                case __SI_MESGQ >> 16:
+                        err |= __put_user(from->si_uid, &to->si_uid);
+                        err |= __put_user(from->si_int, &to->si_int);
+                        break;
+                }
+        }
+        return err;
+}
+
+int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
+{
+        int err;
+        u32 ptr32;
+
+        if (!access_ok(VERIFY_READ, from, sizeof(struct compat_siginfo)))
+                return -EFAULT;
+
+        err = __get_user(to->si_signo, &from->si_signo);
+        err |= __get_user(to->si_errno, &from->si_errno);
+        err |= __get_user(to->si_code, &from->si_code);
+
+        err |= __get_user(to->si_pid, &from->si_pid);
+        err |= __get_user(to->si_uid, &from->si_uid);
+        err |= __get_user(ptr32, &from->si_ptr);
+        to->si_ptr = compat_ptr(ptr32);
+
+        return err;
+}
+
+long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
+                             struct compat_sigaltstack __user *uoss_ptr,
+                             struct pt_regs *regs)
+{
+        stack_t uss, uoss;
+        int ret;
+        mm_segment_t seg;
+
+        if (uss_ptr) {
+                u32 ptr;
+
+                memset(&uss, 0, sizeof(stack_t));
+                if (!access_ok(VERIFY_READ, uss_ptr, sizeof(*uss_ptr)) ||
+                            __get_user(ptr, &uss_ptr->ss_sp) ||
+                            __get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
+                            __get_user(uss.ss_size, &uss_ptr->ss_size))
+                        return -EFAULT;
+                uss.ss_sp = compat_ptr(ptr);
+        }
+        seg = get_fs();
+        set_fs(KERNEL_DS);
+        ret = do_sigaltstack(uss_ptr ? (stack_t __user __force *)&uss : NULL,
+                             (stack_t __user __force *)&uoss,
+                             (unsigned long)compat_ptr(regs->sp));
+        set_fs(seg);
+        if (ret >= 0 && uoss_ptr)  {
+                if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(*uoss_ptr)) ||
+                    __put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
+                    __put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
+                    __put_user(uoss.ss_size, &uoss_ptr->ss_size))
+                        ret = -EFAULT;
+        }
+        return ret;
+}
+
+long _compat_sys_rt_sigreturn(struct pt_regs *regs)
+{
+        struct compat_rt_sigframe __user *frame =
+                (struct compat_rt_sigframe __user *) compat_ptr(regs->sp);
+        sigset_t set;
+        long r0;
+
+        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+                goto badframe;
+        if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+                goto badframe;
+
+        sigdelsetmask(&set, ~_BLOCKABLE);
+        spin_lock_irq(&current->sighand->siglock);
+        current->blocked = set;
+        recalc_sigpending();
+        spin_unlock_irq(&current->sighand->siglock);
+
+        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
+                goto badframe;
+
+        if (_compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0)
+                goto badframe;
+
+        return r0;
+
+badframe:
+        force_sig(SIGSEGV, current);
+        return 0;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void __user *compat_get_sigframe(struct k_sigaction *ka,
+                                               struct pt_regs *regs,
+                                               size_t frame_size)
+{
+        unsigned long sp;
+
+        /* Default to using normal stack */
+        sp = (unsigned long)compat_ptr(regs->sp);
+
+        /*
+         * If we are on the alternate signal stack and would overflow
+         * it, don't.  Return an always-bogus address instead so we
+         * will die with SIGSEGV.
+         */
+        if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
+                return (void __user __force *)-1UL;
+
+        /* This is the X/Open sanctioned signal stack switching.  */
+        if (ka->sa.sa_flags & SA_ONSTACK) {
+                if (sas_ss_flags(sp) == 0)
+                        sp = current->sas_ss_sp + current->sas_ss_size;
+        }
+
+        sp -= frame_size;
+        /*
+         * Align the stack pointer according to the TILE ABI,
+         * i.e. so that on function entry (sp & 15) == 0.
+         */
+        sp &= -16UL;
+        return (void __user *) sp;
+}
+
+int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+                          sigset_t *set, struct pt_regs *regs)
+{
+        unsigned long restorer;
+        struct compat_rt_sigframe __user *frame;
+        int err = 0;
+        int usig;
+
+        frame = compat_get_sigframe(ka, regs, sizeof(*frame));
+
+        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+                goto give_sigsegv;
+
+        usig = current_thread_info()->exec_domain
+                && current_thread_info()->exec_domain->signal_invmap
+                && sig < 32
+                ? current_thread_info()->exec_domain->signal_invmap[sig]
+                : sig;
+
+        /* Always write at least the signal number for the stack backtracer. */
+        if (ka->sa.sa_flags & SA_SIGINFO) {
+                /* At sigreturn time, restore the callee-save registers too. */
+                err |= copy_siginfo_to_user32(&frame->info, info);
+                regs->flags |= PT_FLAGS_RESTORE_REGS;
+        } else {
+                err |= __put_user(info->si_signo, &frame->info.si_signo);
+        }
+
+        /* Create the ucontext.  */
+        err |= __clear_user(&frame->save_area, sizeof(frame->save_area));
+        err |= __put_user(0, &frame->uc.uc_flags);
+        err |= __put_user(0, &frame->uc.uc_link);
+        err |= __put_user(ptr_to_compat((void *)(current->sas_ss_sp)),
+                          &frame->uc.uc_stack.ss_sp);
+        err |= __put_user(sas_ss_flags(regs->sp),
+                          &frame->uc.uc_stack.ss_flags);
+        err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+        err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
+        err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+        if (err)
+                goto give_sigsegv;
+
+        restorer = VDSO_BASE;
+        if (ka->sa.sa_flags & SA_RESTORER)
+                restorer = ptr_to_compat_reg(ka->sa.sa_restorer);
+
+        /*
+         * Set up registers for signal handler.
+         * Registers that we don't modify keep the value they had from
+         * user-space at the time we took the signal.
+         */
+        regs->pc = ptr_to_compat_reg(ka->sa.sa_handler);
+        regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */
+        regs->sp = ptr_to_compat_reg(frame);
+        regs->lr = restorer;
+        regs->regs[0] = (unsigned long) usig;
+
+        if (ka->sa.sa_flags & SA_SIGINFO) {
+                /* Need extra arguments, so mark to restore caller-saves. */
+                regs->regs[1] = ptr_to_compat_reg(&frame->info);
+                regs->regs[2] = ptr_to_compat_reg(&frame->uc);
+                regs->flags |= PT_FLAGS_CALLER_SAVES;
+        }
+
+        /*
+         * Notify any tracer that was single-stepping it.
+         * The tracer may want to single-step inside the
+         * handler too.
+         */
+        if (test_thread_flag(TIF_SINGLESTEP))
+                ptrace_notify(SIGTRAP);
+
+        return 0;
+
+give_sigsegv:
+        force_sigsegv(sig, current);
+        return -EFAULT;
+}
diff --git a/arch/tile/kernel/early_printk.c b/arch/tile/kernel/early_printk.c
new file mode 100644
index 000000000000..2c54fd43a8a0
--- /dev/null
+++ b/arch/tile/kernel/early_printk.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/console.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/setup.h>
+#include <hv/hypervisor.h>
+
+static void early_hv_write(struct console *con, const char *s, unsigned n)
+{
+        hv_console_write((HV_VirtAddr) s, n);
+}
+
+static struct console early_hv_console = {
+        .name =         "earlyhv",
+        .write =        early_hv_write,
+        .flags =        CON_PRINTBUFFER,
+        .index =        -1,
+};
+
+/* Direct interface for emergencies */
+static struct console *early_console = &early_hv_console;
+static int early_console_initialized;
+static int early_console_complete;
+
+static void early_vprintk(const char *fmt, va_list ap)
+{
+        char buf[512];
+        int n = vscnprintf(buf, sizeof(buf), fmt, ap);
+        early_console->write(early_console, buf, n);
+}
+
+void early_printk(const char *fmt, ...)
+{
+        va_list ap;
+        va_start(ap, fmt);
+        early_vprintk(fmt, ap);
+        va_end(ap);
+}
+
+void early_panic(const char *fmt, ...)
+{
+        va_list ap;
+        raw_local_irq_disable_all();
+        va_start(ap, fmt);
+        early_printk("Kernel panic - not syncing: ");
+        early_vprintk(fmt, ap);
+        early_console->write(early_console, "\n", 1);
+        va_end(ap);
+        dump_stack();
+        hv_halt();
+}
+
+static int __initdata keep_early;
+
+static int __init setup_early_printk(char *str)
+{
+        if (early_console_initialized)
+                return 1;
+
+        if (str != NULL && strncmp(str, "keep", 4) == 0)
+                keep_early = 1;
+
+        early_console = &early_hv_console;
+        early_console_initialized = 1;
+        register_console(early_console);
+
+        return 0;
+}
+
+void __init disable_early_printk(void)
+{
+        early_console_complete = 1;
+        if (!early_console_initialized || !early_console)
+                return;
+        if (!keep_early) {
+                early_printk("disabling early console\n");
+                unregister_console(early_console);
+                early_console_initialized = 0;
+        } else {
+                early_printk("keeping early console\n");
+        }
+}
+
+void warn_early_printk(void)
+{
+        if (early_console_complete || early_console_initialized)
+                return;
+        early_printk("\
+Machine shutting down before console output is fully initialized.\n\
+You may wish to reboot and add the option 'earlyprintk' to your\n\
+boot command line to see any diagnostic early console output.\n\
+");
+}
+
+early_param("earlyprintk", setup_early_printk);
diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S
new file mode 100644
index 000000000000..3d01383b1b0e
--- /dev/null
+++ b/arch/tile/kernel/entry.S
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/linkage.h>
+#include <linux/unistd.h>
+#include <asm/irqflags.h>
+#include <arch/abi.h>
+
+#ifdef __tilegx__
+#define bnzt bnezt
+#endif
+
+STD_ENTRY(current_text_addr)
+        { move r0, lr; jrp lr }
+        STD_ENDPROC(current_text_addr)
+
+STD_ENTRY(_sim_syscall)
+        /*
+         * Wait for r0-r9 to be ready (and lr on the off chance we
+         * want the syscall to locate its caller), then make a magic
+         * simulator syscall.
+         *
+         * We carefully stall until the registers are readable in case they
+         * are the target of a slow load, etc. so that tile-sim will
+         * definitely be able to read all of them inside the magic syscall.
+         *
+         * Technically this is wrong for r3-r9 and lr, since an interrupt
+         * could come in and restore the registers with a slow load right
+         * before executing the mtspr. We may need to modify tile-sim to
+         * explicitly stall for this case, but we do not yet have
+         * a way to implement such a stall.
+         */
+        { and zero, lr, r9 ; and zero, r8, r7 }
+        { and zero, r6, r5 ; and zero, r4, r3 }
+        { and zero, r2, r1 ; mtspr SIM_CONTROL, r0 }
+        { jrp lr }
+        STD_ENDPROC(_sim_syscall)
+
+/*
+ * Implement execve().  The i386 code has a note that forking from kernel
+ * space results in no copy on write until the execve, so we should be
+ * careful not to write to the stack here.
+ */
+STD_ENTRY(kernel_execve)
+        moveli TREG_SYSCALL_NR_NAME, __NR_execve
+        swint1
+        jrp lr
+        STD_ENDPROC(kernel_execve)
+
+/* Delay a fixed number of cycles. */
+STD_ENTRY(__delay)
+        { addi r0, r0, -1; bnzt r0, . }
+        jrp lr
+        STD_ENDPROC(__delay)
+
+/*
+ * We don't run this function directly, but instead copy it to a page
+ * we map into every user process.  See vdso_setup().
+ *
+ * Note that libc has a copy of this function that it uses to compare
+ * against the PC when a stack backtrace ends, so if this code is
+ * changed, the libc implementation(s) should also be updated.
+ */
+        .pushsection .data
+ENTRY(__rt_sigreturn)
+        moveli TREG_SYSCALL_NR_NAME,__NR_rt_sigreturn
+        swint1
+        ENDPROC(__rt_sigreturn)
+        ENTRY(__rt_sigreturn_end)
+        .popsection
+
+STD_ENTRY(dump_stack)
+        { move r2, lr; lnk r1 }
+        { move r4, r52; addli r1, r1, dump_stack - . }
+        { move r3, sp; j _dump_stack }
+        jrp lr   /* keep backtracer happy */
+        STD_ENDPROC(dump_stack)
+
+STD_ENTRY(KBacktraceIterator_init_current)
+        { move r2, lr; lnk r1 }
+        { move r4, r52; addli r1, r1, KBacktraceIterator_init_current - . }
+        { move r3, sp; j _KBacktraceIterator_init_current }
+        jrp lr   /* keep backtracer happy */
+        STD_ENDPROC(KBacktraceIterator_init_current)
+
+/*
+ * Reset our stack to r1/r2 (sp and ksp0+cpu respectively), then
+ * free the old stack (passed in r0) and re-invoke cpu_idle().
+ * We update sp and ksp0 simultaneously to avoid backtracer warnings.
+ */
+STD_ENTRY(cpu_idle_on_new_stack)
+        {
+         move sp, r1
+         mtspr SYSTEM_SAVE_1_0, r2
+        }
+        jal free_thread_info
+        j cpu_idle
+        STD_ENDPROC(cpu_idle_on_new_stack)
+
+/* Loop forever on a nap during SMP boot. */
+STD_ENTRY(smp_nap)
+        nap
+        j smp_nap /* we are not architecturally guaranteed not to exit nap */
+        jrp lr    /* clue in the backtracer */
+        STD_ENDPROC(smp_nap)
+
+/*
+ * Enable interrupts racelessly and then nap until interrupted.
+ * This function's _cpu_idle_nap address is special; see intvec.S.
+ * When interrupted at _cpu_idle_nap, we bump the PC forward 8, and
+ * as a result return to the function that called _cpu_idle().
+ */
+STD_ENTRY(_cpu_idle)
+        {
+         lnk r0
+         movei r1, 1
+        }
+        {
+         addli r0, r0, _cpu_idle_nap - .
+         mtspr INTERRUPT_CRITICAL_SECTION, r1
+        }
+        IRQ_ENABLE(r2, r3)         /* unmask, but still with ICS set */
+        mtspr EX_CONTEXT_1_1, r1   /* PL1, ICS clear */
+        mtspr EX_CONTEXT_1_0, r0
+        iret
+        .global _cpu_idle_nap
+_cpu_idle_nap:
+        nap
+        jrp lr
+        STD_ENDPROC(_cpu_idle)
diff --git a/arch/tile/kernel/hardwall.c b/arch/tile/kernel/hardwall.c
new file mode 100644
index 000000000000..584b965dc824
--- /dev/null
+++ b/arch/tile/kernel/hardwall.c
@@ -0,0 +1,796 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/rwsem.h>
+#include <linux/kprobes.h>
+#include <linux/sched.h>
+#include <linux/hardirq.h>
+#include <linux/uaccess.h>
+#include <linux/smp.h>
+#include <linux/cdev.h>
+#include <linux/compat.h>
+#include <asm/hardwall.h>
+#include <asm/traps.h>
+#include <asm/siginfo.h>
+#include <asm/irq_regs.h>
+
+#include <arch/interrupts.h>
+#include <arch/spr_def.h>
+
+
+/*
+ * This data structure tracks the rectangle data, etc., associated
+ * one-to-one with a "struct file *" from opening HARDWALL_FILE.
+ * Note that the file's private data points back to this structure.
+ */
+struct hardwall_info {
+        struct list_head list;             /* "rectangles" list */
+        struct list_head task_head;        /* head of tasks in this hardwall */
+        int ulhc_x;                        /* upper left hand corner x coord */
+        int ulhc_y;                        /* upper left hand corner y coord */
+        int width;                         /* rectangle width */
+        int height;                        /* rectangle height */
+        int teardown_in_progress;          /* are we tearing this one down? */
+};
+
+/* Currently allocated hardwall rectangles */
+static LIST_HEAD(rectangles);
+
+/*
+ * Guard changes to the hardwall data structures.
+ * This could be finer grained (e.g. one lock for the list of hardwall
+ * rectangles, then separate embedded locks for each one's list of tasks),
+ * but there are subtle correctness issues when trying to start with
+ * a task's "hardwall" pointer and lock the correct rectangle's embedded
+ * lock in the presence of a simultaneous deactivation, so it seems
+ * easier to have a single lock, given that none of these data
+ * structures are touched very frequently during normal operation.
+ */
+static DEFINE_SPINLOCK(hardwall_lock);
+
+/* Allow disabling UDN access. */
+static int udn_disabled;
+static int __init noudn(char *str)
+{
+        pr_info("User-space UDN access is disabled\n");
+        udn_disabled = 1;
+        return 0;
+}
+early_param("noudn", noudn);
+
+
+/*
+ * Low-level primitives
+ */
+
+/* Set a CPU bit if the CPU is online. */
+#define cpu_online_set(cpu, dst) do { \
+        if (cpu_online(cpu))          \
+                cpumask_set_cpu(cpu, dst);    \
+} while (0)
+
+
+/* Does the given rectangle contain the given x,y coordinate? */
+static int contains(struct hardwall_info *r, int x, int y)
+{
+        return (x >= r->ulhc_x && x < r->ulhc_x + r->width) &&
+                (y >= r->ulhc_y && y < r->ulhc_y + r->height);
+}
+
+/* Compute the rectangle parameters and validate the cpumask. */
+static int setup_rectangle(struct hardwall_info *r, struct cpumask *mask)
+{
+        int x, y, cpu, ulhc, lrhc;
+
+        /* The first cpu is the ULHC, the last the LRHC. */
+        ulhc = find_first_bit(cpumask_bits(mask), nr_cpumask_bits);
+        lrhc = find_last_bit(cpumask_bits(mask), nr_cpumask_bits);
+
+        /* Compute the rectangle attributes from the cpus. */
+        r->ulhc_x = cpu_x(ulhc);
+        r->ulhc_y = cpu_y(ulhc);
+        r->width = cpu_x(lrhc) - r->ulhc_x + 1;
+        r->height = cpu_y(lrhc) - r->ulhc_y + 1;
+
+        /* Width and height must be positive */
+        if (r->width <= 0 || r->height <= 0)
+                return -EINVAL;
+
+        /* Confirm that the cpumask is exactly the rectangle. */
+        for (y = 0, cpu = 0; y < smp_height; ++y)
+                for (x = 0; x < smp_width; ++x, ++cpu)
+                        if (cpumask_test_cpu(cpu, mask) != contains(r, x, y))
+                                return -EINVAL;
+
+        /*
+         * Note that offline cpus can't be drained when this UDN
+         * rectangle eventually closes.  We used to detect this
+         * situation and print a warning, but it annoyed users and
+         * they ignored it anyway, so now we just return without a
+         * warning.
+         */
+        return 0;
+}
+
+/* Do the two given rectangles overlap on any cpu? */
+static int overlaps(struct hardwall_info *a, struct hardwall_info *b)
+{
+        return a->ulhc_x + a->width > b->ulhc_x &&    /* A not to the left */
+                b->ulhc_x + b->width > a->ulhc_x &&   /* B not to the left */
+                a->ulhc_y + a->height > b->ulhc_y &&  /* A not above */
+                b->ulhc_y + b->height > a->ulhc_y;    /* B not above */
+}
+
+
+/*
+ * Hardware management of hardwall setup, teardown, trapping,
+ * and enabling/disabling PL0 access to the networks.
+ */
+
+/* Bit field values to mask together for writes to SPR_XDN_DIRECTION_PROTECT */
+enum direction_protect {
+        N_PROTECT = (1 << 0),
+        E_PROTECT = (1 << 1),
+        S_PROTECT = (1 << 2),
+        W_PROTECT = (1 << 3)
+};
+
+static void enable_firewall_interrupts(void)
+{
+        raw_local_irq_unmask_now(INT_UDN_FIREWALL);
+}
+
+static void disable_firewall_interrupts(void)
+{
+        raw_local_irq_mask_now(INT_UDN_FIREWALL);
+}
+
+/* Set up hardwall on this cpu based on the passed hardwall_info. */
+static void hardwall_setup_ipi_func(void *info)
+{
+        struct hardwall_info *r = info;
+        int cpu = smp_processor_id();
+        int x = cpu % smp_width;
+        int y = cpu / smp_width;
+        int bits = 0;
+        if (x == r->ulhc_x)
+                bits |= W_PROTECT;
+        if (x == r->ulhc_x + r->width - 1)
+                bits |= E_PROTECT;
+        if (y == r->ulhc_y)
+                bits |= N_PROTECT;
+        if (y == r->ulhc_y + r->height - 1)
+                bits |= S_PROTECT;
+        BUG_ON(bits == 0);
+        __insn_mtspr(SPR_UDN_DIRECTION_PROTECT, bits);
+        enable_firewall_interrupts();
+
+}
+
+/* Set up all cpus on edge of rectangle to enable/disable hardwall SPRs. */
+static void hardwall_setup(struct hardwall_info *r)
+{
+        int x, y, cpu, delta;
+        struct cpumask rect_cpus;
+
+        cpumask_clear(&rect_cpus);
+
+        /* First include the top and bottom edges */
+        cpu = r->ulhc_y * smp_width + r->ulhc_x;
+        delta = (r->height - 1) * smp_width;
+        for (x = 0; x < r->width; ++x, ++cpu) {
+                cpu_online_set(cpu, &rect_cpus);
+                cpu_online_set(cpu + delta, &rect_cpus);
+        }
+
+        /* Then the left and right edges */
+        cpu -= r->width;
+        delta = r->width - 1;
+        for (y = 0; y < r->height; ++y, cpu += smp_width) {
+                cpu_online_set(cpu, &rect_cpus);
+                cpu_online_set(cpu + delta, &rect_cpus);
+        }
+
+        /* Then tell all the cpus to set up their protection SPR */
+        on_each_cpu_mask(&rect_cpus, hardwall_setup_ipi_func, r, 1);
+}
+
+void __kprobes do_hardwall_trap(struct pt_regs* regs, int fault_num)
+{
+        struct hardwall_info *rect;
+        struct task_struct *p;
+        struct siginfo info;
+        int x, y;
+        int cpu = smp_processor_id();
+        int found_processes;
+        unsigned long flags;
+
+        struct pt_regs *old_regs = set_irq_regs(regs);
+        irq_enter();
+
+        /* This tile trapped a network access; find the rectangle. */
+        x = cpu % smp_width;
+        y = cpu / smp_width;
+        spin_lock_irqsave(&hardwall_lock, flags);
+        list_for_each_entry(rect, &rectangles, list) {
+                if (contains(rect, x, y))
+                        break;
+        }
+
+        /*
+         * It shouldn't be possible not to find this cpu on the
+         * rectangle list, since only cpus in rectangles get hardwalled.
+         * The hardwall is only removed after the UDN is drained.
+         */
+        BUG_ON(&rect->list == &rectangles);
+
+        /*
+         * If we already started teardown on this hardwall, don't worry;
+         * the abort signal has been sent and we are just waiting for things
+         * to quiesce.
+         */
+        if (rect->teardown_in_progress) {
+                pr_notice("cpu %d: detected hardwall violation %#lx"
+                       " while teardown already in progress\n",
+                       cpu, (long) __insn_mfspr(SPR_UDN_DIRECTION_PROTECT));
+                goto done;
+        }
+
+        /*
+         * Kill off any process that is activated in this rectangle.
+         * We bypass security to deliver the signal, since it must be
+         * one of the activated processes that generated the UDN
+         * message that caused this trap, and all the activated
+         * processes shared a single open file so are pretty tightly
+         * bound together from a security point of view to begin with.
+         */
+        rect->teardown_in_progress = 1;
+        wmb(); /* Ensure visibility of rectangle before notifying processes. */
+        pr_notice("cpu %d: detected hardwall violation %#lx...\n",
+               cpu, (long) __insn_mfspr(SPR_UDN_DIRECTION_PROTECT));
+        info.si_signo = SIGILL;
+        info.si_errno = 0;
+        info.si_code = ILL_HARDWALL;
+        found_processes = 0;
+        list_for_each_entry(p, &rect->task_head, thread.hardwall_list) {
+                BUG_ON(p->thread.hardwall != rect);
+                if (p->sighand) {
+                        found_processes = 1;
+                        pr_notice("hardwall: killing %d\n", p->pid);
+                        spin_lock(&p->sighand->siglock);
+                        __group_send_sig_info(info.si_signo, &info, p);
+                        spin_unlock(&p->sighand->siglock);
+                }
+        }
+        if (!found_processes)
+                pr_notice("hardwall: no associated processes!\n");
+
+ done:
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+
+        /*
+         * We have to disable firewall interrupts now, or else when we
+         * return from this handler, we will simply re-interrupt back to
+         * it.  However, we can't clear the protection bits, since we
+         * haven't yet drained the network, and that would allow packets
+         * to cross out of the hardwall region.
+         */
+        disable_firewall_interrupts();
+
+        irq_exit();
+        set_irq_regs(old_regs);
+}
+
+/* Allow access from user space to the UDN. */
+void grant_network_mpls(void)
+{
+        __insn_mtspr(SPR_MPL_UDN_ACCESS_SET_0, 1);
+        __insn_mtspr(SPR_MPL_UDN_AVAIL_SET_0, 1);
+        __insn_mtspr(SPR_MPL_UDN_COMPLETE_SET_0, 1);
+        __insn_mtspr(SPR_MPL_UDN_TIMER_SET_0, 1);
+#if !CHIP_HAS_REV1_XDN()
+        __insn_mtspr(SPR_MPL_UDN_REFILL_SET_0, 1);
+        __insn_mtspr(SPR_MPL_UDN_CA_SET_0, 1);
+#endif
+}
+
+/* Deny access from user space to the UDN. */
+void restrict_network_mpls(void)
+{
+        __insn_mtspr(SPR_MPL_UDN_ACCESS_SET_1, 1);
+        __insn_mtspr(SPR_MPL_UDN_AVAIL_SET_1, 1);
+        __insn_mtspr(SPR_MPL_UDN_COMPLETE_SET_1, 1);
+        __insn_mtspr(SPR_MPL_UDN_TIMER_SET_1, 1);
+#if !CHIP_HAS_REV1_XDN()
+        __insn_mtspr(SPR_MPL_UDN_REFILL_SET_1, 1);
+        __insn_mtspr(SPR_MPL_UDN_CA_SET_1, 1);
+#endif
+}
+
+
+/*
+ * Code to create, activate, deactivate, and destroy hardwall rectangles.
+ */
+
+/* Create a hardwall for the given rectangle */
+static struct hardwall_info *hardwall_create(
+        size_t size, const unsigned char __user *bits)
+{
+        struct hardwall_info *iter, *rect;
+        struct cpumask mask;
+        unsigned long flags;
+        int rc;
+
+        /* Reject crazy sizes out of hand, a la sys_mbind(). */
+        if (size > PAGE_SIZE)
+                return ERR_PTR(-EINVAL);
+
+        /* Copy whatever fits into a cpumask. */
+        if (copy_from_user(&mask, bits, min(sizeof(struct cpumask), size)))
+                return ERR_PTR(-EFAULT);
+
+        /*
+         * If the size was short, clear the rest of the mask;
+         * otherwise validate that the rest of the user mask was zero
+         * (we don't try hard to be efficient when validating huge masks).
+         */
+        if (size < sizeof(struct cpumask)) {
+                memset((char *)&mask + size, 0, sizeof(struct cpumask) - size);
+        } else if (size > sizeof(struct cpumask)) {
+                size_t i;
+                for (i = sizeof(struct cpumask); i < size; ++i) {
+                        char c;
+                        if (get_user(c, &bits[i]))
+                                return ERR_PTR(-EFAULT);
+                        if (c)
+                                return ERR_PTR(-EINVAL);
+                }
+        }
+
+        /* Allocate a new rectangle optimistically. */
+        rect = kmalloc(sizeof(struct hardwall_info),
+                        GFP_KERNEL | __GFP_ZERO);
+        if (rect == NULL)
+                return ERR_PTR(-ENOMEM);
+        INIT_LIST_HEAD(&rect->task_head);
+
+        /* Compute the rectangle size and validate that it's plausible. */
+        rc = setup_rectangle(rect, &mask);
+        if (rc != 0) {
+                kfree(rect);
+                return ERR_PTR(rc);
+        }
+
+        /* Confirm it doesn't overlap and add it to the list. */
+        spin_lock_irqsave(&hardwall_lock, flags);
+        list_for_each_entry(iter, &rectangles, list) {
+                if (overlaps(iter, rect)) {
+                        spin_unlock_irqrestore(&hardwall_lock, flags);
+                        kfree(rect);
+                        return ERR_PTR(-EBUSY);
+                }
+        }
+        list_add_tail(&rect->list, &rectangles);
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+
+        /* Set up appropriate hardwalling on all affected cpus. */
+        hardwall_setup(rect);
+
+        return rect;
+}
+
+/* Activate a given hardwall on this cpu for this process. */
+static int hardwall_activate(struct hardwall_info *rect)
+{
+        int cpu, x, y;
+        unsigned long flags;
+        struct task_struct *p = current;
+        struct thread_struct *ts = &p->thread;
+
+        /* Require a rectangle. */
+        if (rect == NULL)
+                return -ENODATA;
+
+        /* Not allowed to activate a rectangle that is being torn down. */
+        if (rect->teardown_in_progress)
+                return -EINVAL;
+
+        /*
+         * Get our affinity; if we're not bound to this tile uniquely,
+         * we can't access the network registers.
+         */
+        if (cpumask_weight(&p->cpus_allowed) != 1)
+                return -EPERM;
+
+        /* Make sure we are bound to a cpu in this rectangle. */
+        cpu = smp_processor_id();
+        BUG_ON(cpumask_first(&p->cpus_allowed) != cpu);
+        x = cpu_x(cpu);
+        y = cpu_y(cpu);
+        if (!contains(rect, x, y))
+                return -EINVAL;
+
+        /* If we are already bound to this hardwall, it's a no-op. */
+        if (ts->hardwall) {
+                BUG_ON(ts->hardwall != rect);
+                return 0;
+        }
+
+        /* Success!  This process gets to use the user networks on this cpu. */
+        ts->hardwall = rect;
+        spin_lock_irqsave(&hardwall_lock, flags);
+        list_add(&ts->hardwall_list, &rect->task_head);
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+        grant_network_mpls();
+        printk(KERN_DEBUG "Pid %d (%s) activated for hardwall: cpu %d\n",
+               p->pid, p->comm, cpu);
+        return 0;
+}
+
+/*
+ * Deactivate a task's hardwall.  Must hold hardwall_lock.
+ * This method may be called from free_task(), so we don't want to
+ * rely on too many fields of struct task_struct still being valid.
+ * We assume the cpus_allowed, pid, and comm fields are still valid.
+ */
+static void _hardwall_deactivate(struct task_struct *task)
+{
+        struct thread_struct *ts = &task->thread;
+
+        if (cpumask_weight(&task->cpus_allowed) != 1) {
+                pr_err("pid %d (%s) releasing networks with"
+                       " an affinity mask containing %d cpus!\n",
+                       task->pid, task->comm,
+                       cpumask_weight(&task->cpus_allowed));
+                BUG();
+        }
+
+        BUG_ON(ts->hardwall == NULL);
+        ts->hardwall = NULL;
+        list_del(&ts->hardwall_list);
+        if (task == current)
+                restrict_network_mpls();
+}
+
+/* Deactivate a task's hardwall. */
+int hardwall_deactivate(struct task_struct *task)
+{
+        unsigned long flags;
+        int activated;
+
+        spin_lock_irqsave(&hardwall_lock, flags);
+        activated = (task->thread.hardwall != NULL);
+        if (activated)
+                _hardwall_deactivate(task);
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+
+        if (!activated)
+                return -EINVAL;
+
+        printk(KERN_DEBUG "Pid %d (%s) deactivated for hardwall: cpu %d\n",
+               task->pid, task->comm, smp_processor_id());
+        return 0;
+}
+
+/* Stop a UDN switch before draining the network. */
+static void stop_udn_switch(void *ignored)
+{
+#if !CHIP_HAS_REV1_XDN()
+        /* Freeze the switch and the demux. */
+        __insn_mtspr(SPR_UDN_SP_FREEZE,
+                     SPR_UDN_SP_FREEZE__SP_FRZ_MASK |
+                     SPR_UDN_SP_FREEZE__DEMUX_FRZ_MASK |
+                     SPR_UDN_SP_FREEZE__NON_DEST_EXT_MASK);
+#endif
+}
+
+/* Drain all the state from a stopped switch. */
+static void drain_udn_switch(void *ignored)
+{
+#if !CHIP_HAS_REV1_XDN()
+        int i;
+        int from_tile_words, ca_count;
+
+        /* Empty out the 5 switch point fifos. */
+        for (i = 0; i < 5; i++) {
+                int words, j;
+                __insn_mtspr(SPR_UDN_SP_FIFO_SEL, i);
+                words = __insn_mfspr(SPR_UDN_SP_STATE) & 0xF;
+                for (j = 0; j < words; j++)
+                        (void) __insn_mfspr(SPR_UDN_SP_FIFO_DATA);
+                BUG_ON((__insn_mfspr(SPR_UDN_SP_STATE) & 0xF) != 0);
+        }
+
+        /* Dump out the 3 word fifo at top. */
+        from_tile_words = (__insn_mfspr(SPR_UDN_DEMUX_STATUS) >> 10) & 0x3;
+        for (i = 0; i < from_tile_words; i++)
+                (void) __insn_mfspr(SPR_UDN_DEMUX_WRITE_FIFO);
+
+        /* Empty out demuxes. */
+        while (__insn_mfspr(SPR_UDN_DATA_AVAIL) & (1 << 0))
+                (void) __tile_udn0_receive();
+        while (__insn_mfspr(SPR_UDN_DATA_AVAIL) & (1 << 1))
+                (void) __tile_udn1_receive();
+        while (__insn_mfspr(SPR_UDN_DATA_AVAIL) & (1 << 2))
+                (void) __tile_udn2_receive();
+        while (__insn_mfspr(SPR_UDN_DATA_AVAIL) & (1 << 3))
+                (void) __tile_udn3_receive();
+        BUG_ON((__insn_mfspr(SPR_UDN_DATA_AVAIL) & 0xF) != 0);
+
+        /* Empty out catch all. */
+        ca_count = __insn_mfspr(SPR_UDN_DEMUX_CA_COUNT);
+        for (i = 0; i < ca_count; i++)
+                (void) __insn_mfspr(SPR_UDN_CA_DATA);
+        BUG_ON(__insn_mfspr(SPR_UDN_DEMUX_CA_COUNT) != 0);
+
+        /* Clear demux logic. */
+        __insn_mtspr(SPR_UDN_DEMUX_CTL, 1);
+
+        /*
+         * Write switch state; experimentation indicates that 0xc3000
+         * is an idle switch point.
+         */
+        for (i = 0; i < 5; i++) {
+                __insn_mtspr(SPR_UDN_SP_FIFO_SEL, i);
+                __insn_mtspr(SPR_UDN_SP_STATE, 0xc3000);
+        }
+#endif
+}
+
+/* Reset random UDN state registers at boot up and during hardwall teardown. */
+void reset_network_state(void)
+{
+#if !CHIP_HAS_REV1_XDN()
+        /* Reset UDN coordinates to their standard value */
+        unsigned int cpu = smp_processor_id();
+        unsigned int x = cpu % smp_width;
+        unsigned int y = cpu / smp_width;
+#endif
+
+        if (udn_disabled)
+                return;
+
+#if !CHIP_HAS_REV1_XDN()
+        __insn_mtspr(SPR_UDN_TILE_COORD, (x << 18) | (y << 7));
+
+        /* Set demux tags to predefined values and enable them. */
+        __insn_mtspr(SPR_UDN_TAG_VALID, 0xf);
+        __insn_mtspr(SPR_UDN_TAG_0, (1 << 0));
+        __insn_mtspr(SPR_UDN_TAG_1, (1 << 1));
+        __insn_mtspr(SPR_UDN_TAG_2, (1 << 2));
+        __insn_mtspr(SPR_UDN_TAG_3, (1 << 3));
+#endif
+
+        /* Clear out other random registers so we have a clean slate. */
+        __insn_mtspr(SPR_UDN_AVAIL_EN, 0);
+        __insn_mtspr(SPR_UDN_DEADLOCK_TIMEOUT, 0);
+#if !CHIP_HAS_REV1_XDN()
+        __insn_mtspr(SPR_UDN_REFILL_EN, 0);
+        __insn_mtspr(SPR_UDN_DEMUX_QUEUE_SEL, 0);
+        __insn_mtspr(SPR_UDN_SP_FIFO_SEL, 0);
+#endif
+
+        /* Start the switch and demux. */
+#if !CHIP_HAS_REV1_XDN()
+        __insn_mtspr(SPR_UDN_SP_FREEZE, 0);
+#endif
+}
+
+/* Restart a UDN switch after draining. */
+static void restart_udn_switch(void *ignored)
+{
+        reset_network_state();
+
+        /* Disable firewall interrupts. */
+        __insn_mtspr(SPR_UDN_DIRECTION_PROTECT, 0);
+        disable_firewall_interrupts();
+}
+
+/* Build a struct cpumask containing all valid tiles in bounding rectangle. */
+static void fill_mask(struct hardwall_info *r, struct cpumask *result)
+{
+        int x, y, cpu;
+
+        cpumask_clear(result);
+
+        cpu = r->ulhc_y * smp_width + r->ulhc_x;
+        for (y = 0; y < r->height; ++y, cpu += smp_width - r->width) {
+                for (x = 0; x < r->width; ++x, ++cpu)
+                        cpu_online_set(cpu, result);
+        }
+}
+
+/* Last reference to a hardwall is gone, so clear the network. */
+static void hardwall_destroy(struct hardwall_info *rect)
+{
+        struct task_struct *task;
+        unsigned long flags;
+        struct cpumask mask;
+
+        /* Make sure this file actually represents a rectangle. */
+        if (rect == NULL)
+                return;
+
+        /*
+         * Deactivate any remaining tasks.  It's possible to race with
+         * some other thread that is exiting and hasn't yet called
+         * deactivate (when freeing its thread_info), so we carefully
+         * deactivate any remaining tasks before freeing the
+         * hardwall_info object itself.
+         */
+        spin_lock_irqsave(&hardwall_lock, flags);
+        list_for_each_entry(task, &rect->task_head, thread.hardwall_list)
+                _hardwall_deactivate(task);
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+
+        /* Drain the UDN. */
+        printk(KERN_DEBUG "Clearing hardwall rectangle %dx%d %d,%d\n",
+               rect->width, rect->height, rect->ulhc_x, rect->ulhc_y);
+        fill_mask(rect, &mask);
+        on_each_cpu_mask(&mask, stop_udn_switch, NULL, 1);
+        on_each_cpu_mask(&mask, drain_udn_switch, NULL, 1);
+
+        /* Restart switch and disable firewall. */
+        on_each_cpu_mask(&mask, restart_udn_switch, NULL, 1);
+
+        /* Now free the rectangle from the list. */
+        spin_lock_irqsave(&hardwall_lock, flags);
+        BUG_ON(!list_empty(&rect->task_head));
+        list_del(&rect->list);
+        spin_unlock_irqrestore(&hardwall_lock, flags);
+        kfree(rect);
+}
+
+
+/*
+ * Dump hardwall state via /proc; initialized in arch/tile/sys/proc.c.
+ */
+int proc_tile_hardwall_show(struct seq_file *sf, void *v)
+{
+        struct hardwall_info *r;
+
+        if (udn_disabled) {
+                seq_printf(sf, "%dx%d 0,0 pids:\n", smp_width, smp_height);
+                return 0;
+        }
+
+        spin_lock_irq(&hardwall_lock);
+        list_for_each_entry(r, &rectangles, list) {
+                struct task_struct *p;
+                seq_printf(sf, "%dx%d %d,%d pids:",
+                           r->width, r->height, r->ulhc_x, r->ulhc_y);
+                list_for_each_entry(p, &r->task_head, thread.hardwall_list) {
+                        unsigned int cpu = cpumask_first(&p->cpus_allowed);
+                        unsigned int x = cpu % smp_width;
+                        unsigned int y = cpu / smp_width;
+                        seq_printf(sf, " %d@%d,%d", p->pid, x, y);
+                }
+                seq_printf(sf, "\n");
+        }
+        spin_unlock_irq(&hardwall_lock);
+        return 0;
+}
+
+
+/*
+ * Character device support via ioctl/close.
+ */
+
+static long hardwall_ioctl(struct file *file, unsigned int a, unsigned long b)
+{
+        struct hardwall_info *rect = file->private_data;
+
+        if (_IOC_TYPE(a) != HARDWALL_IOCTL_BASE)
+                return -EINVAL;
+
+        switch (_IOC_NR(a)) {
+        case _HARDWALL_CREATE:
+                if (udn_disabled)
+                        return -ENOSYS;
+                if (rect != NULL)
+                        return -EALREADY;
+                rect = hardwall_create(_IOC_SIZE(a),
+                                        (const unsigned char __user *)b);
+                if (IS_ERR(rect))
+                        return PTR_ERR(rect);
+                file->private_data = rect;
+                return 0;
+
+        case _HARDWALL_ACTIVATE:
+                return hardwall_activate(rect);
+
+        case _HARDWALL_DEACTIVATE:
+                if (current->thread.hardwall != rect)
+                        return -EINVAL;
+                return hardwall_deactivate(current);
+
+        default:
+                return -EINVAL;
+        }
+}
+
+#ifdef CONFIG_COMPAT
+static long hardwall_compat_ioctl(struct file *file,
+                                  unsigned int a, unsigned long b)
+{
+        /* Sign-extend the argument so it can be used as a pointer. */
+        return hardwall_ioctl(file, a, (unsigned long)compat_ptr(b));
+}
+#endif
+
+/* The user process closed the file; revoke access to user networks. */
+static int hardwall_flush(struct file *file, fl_owner_t owner)
+{
+        struct hardwall_info *rect = file->private_data;
+        struct task_struct *task, *tmp;
+        unsigned long flags;
+
+        if (rect) {
+                /*
+                 * NOTE: if multiple threads are activated on this hardwall
+                 * file, the other threads will continue having access to the
+                 * UDN until they are context-switched out and back in again.
+                 *
+                 * NOTE: A NULL files pointer means the task is being torn
+                 * down, so in that case we also deactivate it.
+                 */
+                spin_lock_irqsave(&hardwall_lock, flags);
+                list_for_each_entry_safe(task, tmp, &rect->task_head,
+                                         thread.hardwall_list) {
+                        if (task->files == owner || task->files == NULL)
+                                _hardwall_deactivate(task);
+                }
+                spin_unlock_irqrestore(&hardwall_lock, flags);
+        }
+
+        return 0;
+}
+
+/* This hardwall is gone, so destroy it. */
+static int hardwall_release(struct inode *inode, struct file *file)
+{
+        hardwall_destroy(file->private_data);
+        return 0;
+}
+
+static const struct file_operations dev_hardwall_fops = {
+        .unlocked_ioctl = hardwall_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = hardwall_compat_ioctl,
+#endif
+        .flush          = hardwall_flush,
+        .release        = hardwall_release,
+};
+
+static struct cdev hardwall_dev;
+
+static int __init dev_hardwall_init(void)
+{
+        int rc;
+        dev_t dev;
+
+        rc = alloc_chrdev_region(&dev, 0, 1, "hardwall");
+        if (rc < 0)
+                return rc;
+        cdev_init(&hardwall_dev, &dev_hardwall_fops);
+        rc = cdev_add(&hardwall_dev, dev, 1);
+        if (rc < 0)
+                return rc;
+
+        return 0;
+}
+late_initcall(dev_hardwall_init);
diff --git a/arch/tile/kernel/head_32.S b/arch/tile/kernel/head_32.S
new file mode 100644
index 000000000000..2b4f6c091701
--- /dev/null
+++ b/arch/tile/kernel/head_32.S
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * TILE startup code.
+ */
+
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/thread_info.h>
+#include <asm/processor.h>
+#include <asm/asm-offsets.h>
+#include <hv/hypervisor.h>
+#include <arch/chip.h>
+
+/*
+ * This module contains the entry code for kernel images. It performs the
+ * minimal setup needed to call the generic C routines.
+ */
+
+        __HEAD
+ENTRY(_start)
+        /* Notify the hypervisor of what version of the API we want */
+        {
+          movei r1, TILE_CHIP
+          movei r2, TILE_CHIP_REV
+        }
+        {
+          moveli r0, _HV_VERSION
+          jal hv_init
+        }
+        /* Get a reasonable default ASID in r0 */
+        {
+          move r0, zero
+          jal hv_inquire_asid
+        }
+        /* Install the default page table */
+        {
+          moveli r6, lo16(swapper_pgprot - PAGE_OFFSET)
+          move r4, r0     /* use starting ASID of range for this page table */
+        }
+        {
+          moveli r0, lo16(swapper_pg_dir - PAGE_OFFSET)
+          auli r6, r6, ha16(swapper_pgprot - PAGE_OFFSET)
+        }
+        {
+          lw r2, r6
+          addi r6, r6, 4
+        }
+        {
+          lw r3, r6
+          auli r0, r0, ha16(swapper_pg_dir - PAGE_OFFSET)
+        }
+        {
+          inv r6
+          move r1, zero   /* high 32 bits of CPA is zero */
+        }
+        {
+          moveli lr, lo16(1f)
+          move r5, zero
+        }
+        {
+          auli lr, lr, ha16(1f)
+          j hv_install_context
+        }
+1:
+
+        /* Get our processor number and save it away in SAVE_1_0. */
+        jal hv_inquire_topology
+        mulll_uu r4, r1, r2        /* r1 == y, r2 == width */
+        add r4, r4, r0             /* r0 == x, so r4 == cpu == y*width + x */
+
+#ifdef CONFIG_SMP
+        /*
+         * Load up our per-cpu offset.  When the first (master) tile
+         * boots, this value is still zero, so we will load boot_pc
+         * with start_kernel, and boot_sp with init_stack + THREAD_SIZE.
+         * The master tile initializes the per-cpu offset array, so that
+         * when subsequent (secondary) tiles boot, they will instead load
+         * from their per-cpu versions of boot_sp and boot_pc.
+         */
+        moveli r5, lo16(__per_cpu_offset)
+        auli r5, r5, ha16(__per_cpu_offset)
+        s2a r5, r4, r5
+        lw r5, r5
+        bnz r5, 1f
+
+        /*
+         * Save the width and height to the smp_topology variable
+         * for later use.
+         */
+        moveli r0, lo16(smp_topology + HV_TOPOLOGY_WIDTH_OFFSET)
+        auli r0, r0, ha16(smp_topology + HV_TOPOLOGY_WIDTH_OFFSET)
+        {
+          sw r0, r2
+          addi r0, r0, (HV_TOPOLOGY_HEIGHT_OFFSET - HV_TOPOLOGY_WIDTH_OFFSET)
+        }
+        sw r0, r3
+1:
+#else
+        move r5, zero
+#endif
+
+        /* Load and go with the correct pc and sp. */
+        {
+          addli r1, r5, lo16(boot_sp)
+          addli r0, r5, lo16(boot_pc)
+        }
+        {
+          auli r1, r1, ha16(boot_sp)
+          auli r0, r0, ha16(boot_pc)
+        }
+        lw r0, r0
+        lw sp, r1
+        or r4, sp, r4
+        mtspr SYSTEM_SAVE_1_0, r4  /* save ksp0 + cpu */
+        addi sp, sp, -STACK_TOP_DELTA
+        {
+          move lr, zero   /* stop backtraces in the called function */
+          jr r0
+        }
+        ENDPROC(_start)
+
+.section ".bss.page_aligned","w"
+        .align PAGE_SIZE
+ENTRY(empty_zero_page)
+        .fill PAGE_SIZE,1,0
+        END(empty_zero_page)
+
+        .macro PTE va, cpa, bits1, no_org=0
+        .ifeq \no_org
+        .org swapper_pg_dir + HV_L1_INDEX(\va) * HV_PTE_SIZE
+        .endif
+        .word HV_PTE_PAGE | HV_PTE_DIRTY | HV_PTE_PRESENT | HV_PTE_ACCESSED | \
+              (HV_PTE_MODE_CACHE_NO_L3 << HV_PTE_INDEX_MODE)
+        .word (\bits1) | (HV_CPA_TO_PFN(\cpa) << HV_PTE_INDEX_PFN)
+        .endm
+
+.section ".data.page_aligned","wa"
+        .align PAGE_SIZE
+ENTRY(swapper_pg_dir)
+        /*
+         * All data pages from PAGE_OFFSET to MEM_USER_INTRPT are mapped as
+         * VA = PA + PAGE_OFFSET.  We remap things with more precise access
+         * permissions and more respect for size of RAM later.
+         */
+        .set addr, 0
+        .rept (MEM_USER_INTRPT - PAGE_OFFSET) >> PGDIR_SHIFT
+        PTE addr + PAGE_OFFSET, addr, HV_PTE_READABLE | HV_PTE_WRITABLE
+        .set addr, addr + PGDIR_SIZE
+        .endr
+
+        /* The true text VAs are mapped as VA = PA + MEM_SV_INTRPT */
+        PTE MEM_SV_INTRPT, 0, HV_PTE_READABLE | HV_PTE_EXECUTABLE
+        .org swapper_pg_dir + HV_L1_SIZE
+        END(swapper_pg_dir)
+
+        /*
+         * Isolate swapper_pgprot to its own cache line, since each cpu
+         * starting up will read it using VA-is-PA and local homing.
+         * This would otherwise likely conflict with other data on the cache
+         * line, once we have set its permanent home in the page tables.
+         */
+        __INITDATA
+        .align CHIP_L2_LINE_SIZE()
+ENTRY(swapper_pgprot)
+        PTE     0, 0, HV_PTE_READABLE | HV_PTE_WRITABLE, 1
+        .align CHIP_L2_LINE_SIZE()
+        END(swapper_pgprot)
diff --git a/arch/tile/kernel/hvglue.lds b/arch/tile/kernel/hvglue.lds
new file mode 100644
index 000000000000..2b7cd0a659a9
--- /dev/null
+++ b/arch/tile/kernel/hvglue.lds
@@ -0,0 +1,58 @@
+/* Hypervisor call vector addresses; see <hv/hypervisor.h> */
+hv_init = TEXT_OFFSET + 0x10020;
+hv_install_context = TEXT_OFFSET + 0x10040;
+hv_sysconf = TEXT_OFFSET + 0x10060;
+hv_get_rtc = TEXT_OFFSET + 0x10080;
+hv_set_rtc = TEXT_OFFSET + 0x100a0;
+hv_flush_asid = TEXT_OFFSET + 0x100c0;
+hv_flush_page = TEXT_OFFSET + 0x100e0;
+hv_flush_pages = TEXT_OFFSET + 0x10100;
+hv_restart = TEXT_OFFSET + 0x10120;
+hv_halt = TEXT_OFFSET + 0x10140;
+hv_power_off = TEXT_OFFSET + 0x10160;
+hv_inquire_physical = TEXT_OFFSET + 0x10180;
+hv_inquire_memory_controller = TEXT_OFFSET + 0x101a0;
+hv_inquire_virtual = TEXT_OFFSET + 0x101c0;
+hv_inquire_asid = TEXT_OFFSET + 0x101e0;
+hv_nanosleep = TEXT_OFFSET + 0x10200;
+hv_console_read_if_ready = TEXT_OFFSET + 0x10220;
+hv_console_write = TEXT_OFFSET + 0x10240;
+hv_downcall_dispatch = TEXT_OFFSET + 0x10260;
+hv_inquire_topology = TEXT_OFFSET + 0x10280;
+hv_fs_findfile = TEXT_OFFSET + 0x102a0;
+hv_fs_fstat = TEXT_OFFSET + 0x102c0;
+hv_fs_pread = TEXT_OFFSET + 0x102e0;
+hv_physaddr_read64 = TEXT_OFFSET + 0x10300;
+hv_physaddr_write64 = TEXT_OFFSET + 0x10320;
+hv_get_command_line = TEXT_OFFSET + 0x10340;
+hv_set_caching = TEXT_OFFSET + 0x10360;
+hv_bzero_page = TEXT_OFFSET + 0x10380;
+hv_register_message_state = TEXT_OFFSET + 0x103a0;
+hv_send_message = TEXT_OFFSET + 0x103c0;
+hv_receive_message = TEXT_OFFSET + 0x103e0;
+hv_inquire_context = TEXT_OFFSET + 0x10400;
+hv_start_all_tiles = TEXT_OFFSET + 0x10420;
+hv_dev_open = TEXT_OFFSET + 0x10440;
+hv_dev_close = TEXT_OFFSET + 0x10460;
+hv_dev_pread = TEXT_OFFSET + 0x10480;
+hv_dev_pwrite = TEXT_OFFSET + 0x104a0;
+hv_dev_poll = TEXT_OFFSET + 0x104c0;
+hv_dev_poll_cancel = TEXT_OFFSET + 0x104e0;
+hv_dev_preada = TEXT_OFFSET + 0x10500;
+hv_dev_pwritea = TEXT_OFFSET + 0x10520;
+hv_flush_remote = TEXT_OFFSET + 0x10540;
+hv_console_putc = TEXT_OFFSET + 0x10560;
+hv_inquire_tiles = TEXT_OFFSET + 0x10580;
+hv_confstr = TEXT_OFFSET + 0x105a0;
+hv_reexec = TEXT_OFFSET + 0x105c0;
+hv_set_command_line = TEXT_OFFSET + 0x105e0;
+hv_clear_intr = TEXT_OFFSET + 0x10600;
+hv_enable_intr = TEXT_OFFSET + 0x10620;
+hv_disable_intr = TEXT_OFFSET + 0x10640;
+hv_raise_intr = TEXT_OFFSET + 0x10660;
+hv_trigger_ipi = TEXT_OFFSET + 0x10680;
+hv_store_mapping = TEXT_OFFSET + 0x106a0;
+hv_inquire_realpa = TEXT_OFFSET + 0x106c0;
+hv_flush_all = TEXT_OFFSET + 0x106e0;
+hv_get_ipi_pte = TEXT_OFFSET + 0x10700;
+hv_glue_internals = TEXT_OFFSET + 0x10720;
diff --git a/arch/tile/kernel/init_task.c b/arch/tile/kernel/init_task.c
new file mode 100644
index 000000000000..928b31870669
--- /dev/null
+++ b/arch/tile/kernel/init_task.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+#include <linux/module.h>
+#include <linux/start_kernel.h>
+#include <linux/uaccess.h>
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is THREAD_SIZE aligned due to the
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry..
+ */
+union thread_union init_thread_union __init_task_data = {
+        INIT_THREAD_INFO(init_task)
+};
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
+
+/*
+ * per-CPU stack and boot info.
+ */
+DEFINE_PER_CPU(unsigned long, boot_sp) =
+        (unsigned long)init_stack + THREAD_SIZE;
+
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(unsigned long, boot_pc) = (unsigned long)start_kernel;
+#else
+/*
+ * The variable must be __initdata since it references __init code.
+ * With CONFIG_SMP it is per-cpu data, which is exempt from validation.
+ */
+unsigned long __initdata boot_pc = (unsigned long)start_kernel;
+#endif
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
new file mode 100644
index 000000000000..84f296ca9e63
--- /dev/null
+++ b/arch/tile/kernel/intvec_32.S
@@ -0,0 +1,2018 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Linux interrupt vectors.
+ */
+
+#include <linux/linkage.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/unistd.h>
+#include <asm/ptrace.h>
+#include <asm/thread_info.h>
+#include <asm/irqflags.h>
+#include <asm/atomic.h>
+#include <asm/asm-offsets.h>
+#include <hv/hypervisor.h>
+#include <arch/abi.h>
+#include <arch/interrupts.h>
+#include <arch/spr_def.h>
+
+#ifdef CONFIG_PREEMPT
+# error "No support for kernel preemption currently"
+#endif
+
+#if INT_INTCTRL_1 < 32 || INT_INTCTRL_1 >= 48
+# error INT_INTCTRL_1 coded to set high interrupt mask
+#endif
+
+#define PTREGS_PTR(reg, ptreg) addli reg, sp, C_ABI_SAVE_AREA_SIZE + (ptreg)
+
+#define PTREGS_OFFSET_SYSCALL PTREGS_OFFSET_REG(TREG_SYSCALL_NR)
+
+#if !CHIP_HAS_WH64()
+        /* By making this an empty macro, we can use wh64 in the code. */
+        .macro  wh64 reg
+        .endm
+#endif
+
+        .macro  push_reg reg, ptr=sp, delta=-4
+        {
+         sw     \ptr, \reg
+         addli  \ptr, \ptr, \delta
+        }
+        .endm
+
+        .macro  pop_reg reg, ptr=sp, delta=4
+        {
+         lw     \reg, \ptr
+         addli  \ptr, \ptr, \delta
+        }
+        .endm
+
+        .macro  pop_reg_zero reg, zreg, ptr=sp, delta=4
+        {
+         move   \zreg, zero
+         lw     \reg, \ptr
+         addi   \ptr, \ptr, \delta
+        }
+        .endm
+
+        .macro  push_extra_callee_saves reg
+        PTREGS_PTR(\reg, PTREGS_OFFSET_REG(51))
+        push_reg r51, \reg
+        push_reg r50, \reg
+        push_reg r49, \reg
+        push_reg r48, \reg
+        push_reg r47, \reg
+        push_reg r46, \reg
+        push_reg r45, \reg
+        push_reg r44, \reg
+        push_reg r43, \reg
+        push_reg r42, \reg
+        push_reg r41, \reg
+        push_reg r40, \reg
+        push_reg r39, \reg
+        push_reg r38, \reg
+        push_reg r37, \reg
+        push_reg r36, \reg
+        push_reg r35, \reg
+        push_reg r34, \reg, PTREGS_OFFSET_BASE - PTREGS_OFFSET_REG(34)
+        .endm
+
+        .macro  panic str
+        .pushsection .rodata, "a"
+1:
+        .asciz  "\str"
+        .popsection
+        {
+         moveli r0, lo16(1b)
+        }
+        {
+         auli   r0, r0, ha16(1b)
+         jal    panic
+        }
+        .endm
+
+#ifdef __COLLECT_LINKER_FEEDBACK__
+        .pushsection .text.intvec_feedback,"ax"
+intvec_feedback:
+        .popsection
+#endif
+
+        /*
+         * Default interrupt handler.
+         *
+         * vecnum is where we'll put this code.
+         * c_routine is the C routine we'll call.
+         *
+         * The C routine is passed two arguments:
+         * - A pointer to the pt_regs state.
+         * - The interrupt vector number.
+         *
+         * The "processing" argument specifies the code for processing
+         * the interrupt. Defaults to "handle_interrupt".
+         */
+        .macro  int_hand vecnum, vecname, c_routine, processing=handle_interrupt
+        .org    (\vecnum << 8)
+intvec_\vecname:
+        .ifc    \vecnum, INT_SWINT_1
+        blz     TREG_SYSCALL_NR_NAME, sys_cmpxchg
+        .endif
+
+        /* Temporarily save a register so we have somewhere to work. */
+
+        mtspr   SYSTEM_SAVE_1_1, r0
+        mfspr   r0, EX_CONTEXT_1_1
+
+        /* The cmpxchg code clears sp to force us to reset it here on fault. */
+        {
+         bz     sp, 2f
+         andi   r0, r0, SPR_EX_CONTEXT_1_1__PL_MASK  /* mask off ICS */
+        }
+
+        .ifc    \vecnum, INT_DOUBLE_FAULT
+        /*
+         * For double-faults from user-space, fall through to the normal
+         * register save and stack setup path.  Otherwise, it's the
+         * hypervisor giving us one last chance to dump diagnostics, and we
+         * branch to the kernel_double_fault routine to do so.
+         */
+        bz      r0, 1f
+        j       _kernel_double_fault
+1:
+        .else
+        /*
+         * If we're coming from user-space, then set sp to the top of
+         * the kernel stack.  Otherwise, assume sp is already valid.
+         */
+        {
+         bnz    r0, 0f
+         move   r0, sp
+        }
+        .endif
+
+        .ifc    \c_routine, do_page_fault
+        /*
+         * The page_fault handler may be downcalled directly by the
+         * hypervisor even when Linux is running and has ICS set.
+         *
+         * In this case the contents of EX_CONTEXT_1_1 reflect the
+         * previous fault and can't be relied on to choose whether or
+         * not to reinitialize the stack pointer.  So we add a test
+         * to see whether SYSTEM_SAVE_1_2 has the high bit set,
+         * and if so we don't reinitialize sp, since we must be coming
+         * from Linux.  (In fact the precise case is !(val & ~1),
+         * but any Linux PC has to have the high bit set.)
+         *
+         * Note that the hypervisor *always* sets SYSTEM_SAVE_1_2 for
+         * any path that turns into a downcall to one of our TLB handlers.
+         */
+        mfspr   r0, SYSTEM_SAVE_1_2
+        {
+         blz    r0, 0f    /* high bit in S_S_1_2 is for a PC to use */
+         move   r0, sp
+        }
+        .endif
+
+2:
+        /*
+         * SYSTEM_SAVE_1_0 holds the cpu number in the low bits, and
+         * the current stack top in the higher bits.  So we recover
+         * our stack top by just masking off the low bits, then
+         * point sp at the top aligned address on the actual stack page.
+         */
+        mfspr   r0, SYSTEM_SAVE_1_0
+        mm      r0, r0, zero, LOG2_THREAD_SIZE, 31
+
+0:
+        /*
+         * Align the stack mod 64 so we can properly predict what
+         * cache lines we need to write-hint to reduce memory fetch
+         * latency as we enter the kernel.  The layout of memory is
+         * as follows, with cache line 0 at the lowest VA, and cache
+         * line 4 just below the r0 value this "andi" computes.
+         * Note that we never write to cache line 4, and we skip
+         * cache line 1 for syscalls.
+         *
+         *    cache line 4: ptregs padding (two words)
+         *    cache line 3: r46...lr, pc, ex1, faultnum, orig_r0, flags, pad
+         *    cache line 2: r30...r45
+         *    cache line 1: r14...r29
+         *    cache line 0: 2 x frame, r0..r13
+         */
+        andi    r0, r0, -64
+
+        /*
+         * Push the first four registers on the stack, so that we can set
+         * them to vector-unique values before we jump to the common code.
+         *
+         * Registers are pushed on the stack as a struct pt_regs,
+         * with the sp initially just above the struct, and when we're
+         * done, sp points to the base of the struct, minus
+         * C_ABI_SAVE_AREA_SIZE, so we can directly jal to C code.
+         *
+         * This routine saves just the first four registers, plus the
+         * stack context so we can do proper backtracing right away,
+         * and defers to handle_interrupt to save the rest.
+         * The backtracer needs pc, ex1, lr, sp, r52, and faultnum.
+         */
+        addli   r0, r0, PTREGS_OFFSET_LR - (PTREGS_SIZE + KSTK_PTREGS_GAP)
+        wh64    r0    /* cache line 3 */
+        {
+         sw     r0, lr
+         addli  r0, r0, PTREGS_OFFSET_SP - PTREGS_OFFSET_LR
+        }
+        {
+         sw     r0, sp
+         addli  sp, r0, PTREGS_OFFSET_REG(52) - PTREGS_OFFSET_SP
+        }
+        {
+         sw     sp, r52
+         addli  sp, sp, PTREGS_OFFSET_REG(1) - PTREGS_OFFSET_REG(52)
+        }
+        wh64    sp    /* cache line 0 */
+        {
+         sw     sp, r1
+         addli  sp, sp, PTREGS_OFFSET_REG(2) - PTREGS_OFFSET_REG(1)
+        }
+        {
+         sw     sp, r2
+         addli  sp, sp, PTREGS_OFFSET_REG(3) - PTREGS_OFFSET_REG(2)
+        }
+        {
+         sw     sp, r3
+         addli  sp, sp, PTREGS_OFFSET_PC - PTREGS_OFFSET_REG(3)
+        }
+        mfspr   r0, EX_CONTEXT_1_0
+        .ifc \processing,handle_syscall
+        /*
+         * Bump the saved PC by one bundle so that when we return, we won't
+         * execute the same swint instruction again.  We need to do this while
+         * we're in the critical section.
+         */
+        addi    r0, r0, 8
+        .endif
+        {
+         sw     sp, r0
+         addli  sp, sp, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC
+        }
+        mfspr   r0, EX_CONTEXT_1_1
+        {
+         sw     sp, r0
+         addi   sp, sp, PTREGS_OFFSET_FAULTNUM - PTREGS_OFFSET_EX1
+        /*
+         * Use r0 for syscalls so it's a temporary; use r1 for interrupts
+         * so that it gets passed through unchanged to the handler routine.
+         * Note that the .if conditional confusingly spans bundles.
+         */
+         .ifc \processing,handle_syscall
+         movei  r0, \vecnum
+        }
+        {
+         sw     sp, r0
+         .else
+         movei  r1, \vecnum
+        }
+        {
+         sw     sp, r1
+         .endif
+         addli  sp, sp, PTREGS_OFFSET_REG(0) - PTREGS_OFFSET_FAULTNUM
+        }
+        mfspr   r0, SYSTEM_SAVE_1_1    /* Original r0 */
+        {
+         sw     sp, r0
+         addi   sp, sp, -PTREGS_OFFSET_REG(0) - 4
+        }
+        {
+         sw     sp, zero        /* write zero into "Next SP" frame pointer */
+         addi   sp, sp, -4      /* leave SP pointing at bottom of frame */
+        }
+        .ifc \processing,handle_syscall
+        j       handle_syscall
+        .else
+        /*
+         * Capture per-interrupt SPR context to registers.
+         * We overload the meaning of r3 on this path such that if its bit 31
+         * is set, we have to mask all interrupts including NMIs before
+         * clearing the interrupt critical section bit.
+         * See discussion below at "finish_interrupt_save".
+         */
+        .ifc \c_routine, do_page_fault
+        mfspr   r2, SYSTEM_SAVE_1_3   /* address of page fault */
+        mfspr   r3, SYSTEM_SAVE_1_2   /* info about page fault */
+        .else
+        .ifc \vecnum, INT_DOUBLE_FAULT
+        {
+         mfspr  r2, SYSTEM_SAVE_1_2   /* double fault info from HV */
+         movei  r3, 0
+        }
+        .else
+        .ifc \c_routine, do_trap
+        {
+         mfspr  r2, GPV_REASON
+         movei  r3, 0
+        }
+        .else
+        .ifc \c_routine, op_handle_perf_interrupt
+        {
+         mfspr  r2, PERF_COUNT_STS
+         movei  r3, -1   /* not used, but set for consistency */
+        }
+        .else
+#if CHIP_HAS_AUX_PERF_COUNTERS()
+        .ifc \c_routine, op_handle_aux_perf_interrupt
+        {
+         mfspr  r2, AUX_PERF_COUNT_STS
+         movei  r3, -1   /* not used, but set for consistency */
+        }
+        .else
+#endif
+        movei   r3, 0
+#if CHIP_HAS_AUX_PERF_COUNTERS()
+        .endif
+#endif
+        .endif
+        .endif
+        .endif
+        .endif
+        /* Put function pointer in r0 */
+        moveli  r0, lo16(\c_routine)
+        {
+         auli   r0, r0, ha16(\c_routine)
+         j       \processing
+        }
+        .endif
+        ENDPROC(intvec_\vecname)
+
+#ifdef __COLLECT_LINKER_FEEDBACK__
+        .pushsection .text.intvec_feedback,"ax"
+        .org    (\vecnum << 5)
+        FEEDBACK_ENTER_EXPLICIT(intvec_\vecname, .intrpt1, 1 << 8)
+        jrp     lr
+        .popsection
+#endif
+
+        .endm
+
+
+        /*
+         * Save the rest of the registers that we didn't save in the actual
+         * vector itself.  We can't use r0-r10 inclusive here.
+         */
+        .macro  finish_interrupt_save, function
+
+        /* If it's a syscall, save a proper orig_r0, otherwise just zero. */
+        PTREGS_PTR(r52, PTREGS_OFFSET_ORIG_R0)
+        {
+         .ifc \function,handle_syscall
+         sw     r52, r0
+         .else
+         sw     r52, zero
+         .endif
+         PTREGS_PTR(r52, PTREGS_OFFSET_TP)
+        }
+
+        /*
+         * For ordinary syscalls, we save neither caller- nor callee-
+         * save registers, since the syscall invoker doesn't expect the
+         * caller-saves to be saved, and the called kernel functions will
+         * take care of saving the callee-saves for us.
+         *
+         * For interrupts we save just the caller-save registers.  Saving
+         * them is required (since the "caller" can't save them).  Again,
+         * the called kernel functions will restore the callee-save
+         * registers for us appropriately.
+         *
+         * On return, we normally restore nothing special for syscalls,
+         * and just the caller-save registers for interrupts.
+         *
+         * However, there are some important caveats to all this:
+         *
+         * - We always save a few callee-save registers to give us
+         *   some scratchpad registers to carry across function calls.
+         *
+         * - fork/vfork/etc require us to save all the callee-save
+         *   registers, which we do in PTREGS_SYSCALL_ALL_REGS, below.
+         *
+         * - We always save r0..r5 and r10 for syscalls, since we need
+         *   to reload them a bit later for the actual kernel call, and
+         *   since we might need them for -ERESTARTNOINTR, etc.
+         *
+         * - Before invoking a signal handler, we save the unsaved
+         *   callee-save registers so they are visible to the
+         *   signal handler or any ptracer.
+         *
+         * - If the unsaved callee-save registers are modified, we set
+         *   a bit in pt_regs so we know to reload them from pt_regs
+         *   and not just rely on the kernel function unwinding.
+         *   (Done for ptrace register writes and SA_SIGINFO handler.)
+         */
+        {
+         sw     r52, tp
+         PTREGS_PTR(r52, PTREGS_OFFSET_REG(33))
+        }
+        wh64    r52    /* cache line 2 */
+        push_reg r33, r52
+        push_reg r32, r52
+        push_reg r31, r52
+        .ifc \function,handle_syscall
+        push_reg r30, r52, PTREGS_OFFSET_SYSCALL - PTREGS_OFFSET_REG(30)
+        push_reg TREG_SYSCALL_NR_NAME, r52, \
+          PTREGS_OFFSET_REG(5) - PTREGS_OFFSET_SYSCALL
+        .else
+
+        push_reg r30, r52, PTREGS_OFFSET_REG(29) - PTREGS_OFFSET_REG(30)
+        wh64    r52    /* cache line 1 */
+        push_reg r29, r52
+        push_reg r28, r52
+        push_reg r27, r52
+        push_reg r26, r52
+        push_reg r25, r52
+        push_reg r24, r52
+        push_reg r23, r52
+        push_reg r22, r52
+        push_reg r21, r52
+        push_reg r20, r52
+        push_reg r19, r52
+        push_reg r18, r52
+        push_reg r17, r52
+        push_reg r16, r52
+        push_reg r15, r52
+        push_reg r14, r52
+        push_reg r13, r52
+        push_reg r12, r52
+        push_reg r11, r52
+        push_reg r10, r52
+        push_reg r9, r52
+        push_reg r8, r52
+        push_reg r7, r52
+        push_reg r6, r52
+
+        .endif
+
+        push_reg r5, r52
+        sw      r52, r4
+
+        /* Load tp with our per-cpu offset. */
+#ifdef CONFIG_SMP
+        {
+         mfspr  r20, SYSTEM_SAVE_1_0
+         moveli r21, lo16(__per_cpu_offset)
+        }
+        {
+         auli   r21, r21, ha16(__per_cpu_offset)
+         mm     r20, r20, zero, 0, LOG2_THREAD_SIZE-1
+        }
+        s2a     r20, r20, r21
+        lw      tp, r20
+#else
+        move    tp, zero
+#endif
+
+        /*
+         * If we will be returning to the kernel, we will need to
+         * reset the interrupt masks to the state they had before.
+         * Set DISABLE_IRQ in flags iff we came from PL1 with irqs disabled.
+         * We load flags in r32 here so we can jump to .Lrestore_regs
+         * directly after do_page_fault_ics() if necessary.
+         */
+        mfspr   r32, EX_CONTEXT_1_1
+        {
+         andi   r32, r32, SPR_EX_CONTEXT_1_1__PL_MASK  /* mask off ICS */
+         PTREGS_PTR(r21, PTREGS_OFFSET_FLAGS)
+        }
+        bzt     r32, 1f       /* zero if from user space */
+        IRQS_DISABLED(r32)    /* zero if irqs enabled */
+#if PT_FLAGS_DISABLE_IRQ != 1
+# error Value of IRQS_DISABLED used to set PT_FLAGS_DISABLE_IRQ; fix
+#endif
+1:
+        .ifnc \function,handle_syscall
+        /* Record the fact that we saved the caller-save registers above. */
+        ori     r32, r32, PT_FLAGS_CALLER_SAVES
+        .endif
+        sw      r21, r32
+
+#ifdef __COLLECT_LINKER_FEEDBACK__
+        /*
+         * Notify the feedback routines that we were in the
+         * appropriate fixed interrupt vector area.  Note that we
+         * still have ICS set at this point, so we can't invoke any
+         * atomic operations or we will panic.  The feedback
+         * routines internally preserve r0..r10 and r30 up.
+         */
+        .ifnc \function,handle_syscall
+        shli    r20, r1, 5
+        .else
+        moveli  r20, INT_SWINT_1 << 5
+        .endif
+        addli   r20, r20, lo16(intvec_feedback)
+        auli    r20, r20, ha16(intvec_feedback)
+        jalr    r20
+
+        /* And now notify the feedback routines that we are here. */
+        FEEDBACK_ENTER(\function)
+#endif
+
+        /*
+         * we've captured enough state to the stack (including in
+         * particular our EX_CONTEXT state) that we can now release
+         * the interrupt critical section and replace it with our
+         * standard "interrupts disabled" mask value.  This allows
+         * synchronous interrupts (and profile interrupts) to punch
+         * through from this point onwards.
+         *
+         * If bit 31 of r3 is set during a non-NMI interrupt, we know we
+         * are on the path where the hypervisor has punched through our
+         * ICS with a page fault, so we call out to do_page_fault_ics()
+         * to figure out what to do with it.  If the fault was in
+         * an atomic op, we unlock the atomic lock, adjust the
+         * saved register state a little, and return "zero" in r4,
+         * falling through into the normal page-fault interrupt code.
+         * If the fault was in a kernel-space atomic operation, then
+         * do_page_fault_ics() resolves it itself, returns "one" in r4,
+         * and as a result goes directly to restoring registers and iret,
+         * without trying to adjust the interrupt masks at all.
+         * The do_page_fault_ics() API involves passing and returning
+         * a five-word struct (in registers) to avoid writing the
+         * save and restore code here.
+         */
+        .ifc \function,handle_nmi
+        IRQ_DISABLE_ALL(r20)
+        .else
+        .ifnc \function,handle_syscall
+        bgezt   r3, 1f
+        {
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+         jal    do_page_fault_ics
+        }
+        FEEDBACK_REENTER(\function)
+        bzt     r4, 1f
+        j       .Lrestore_regs
+1:
+        .endif
+        IRQ_DISABLE(r20, r21)
+        .endif
+        mtspr   INTERRUPT_CRITICAL_SECTION, zero
+
+#if CHIP_HAS_WH64()
+        /*
+         * Prepare the first 256 stack bytes to be rapidly accessible
+         * without having to fetch the background data.  We don't really
+         * know how far to write-hint, but kernel stacks generally
+         * aren't that big, and write-hinting here does take some time.
+         */
+        addi    r52, sp, -64
+        {
+         wh64   r52
+         addi   r52, r52, -64
+        }
+        {
+         wh64   r52
+         addi   r52, r52, -64
+        }
+        {
+         wh64   r52
+         addi   r52, r52, -64
+        }
+        wh64    r52
+#endif
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+        .ifnc \function,handle_nmi
+        /*
+         * We finally have enough state set up to notify the irq
+         * tracing code that irqs were disabled on entry to the handler.
+         * The TRACE_IRQS_OFF call clobbers registers r0-r29.
+         * For syscalls, we already have the register state saved away
+         * on the stack, so we don't bother to do any register saves here,
+         * and later we pop the registers back off the kernel stack.
+         * For interrupt handlers, save r0-r3 in callee-saved registers.
+         */
+        .ifnc \function,handle_syscall
+        { move r30, r0; move r31, r1 }
+        { move r32, r2; move r33, r3 }
+        .endif
+        TRACE_IRQS_OFF
+        .ifnc \function,handle_syscall
+        { move r0, r30; move r1, r31 }
+        { move r2, r32; move r3, r33 }
+        .endif
+        .endif
+#endif
+
+        .endm
+
+        .macro  check_single_stepping, kind, not_single_stepping
+        /*
+         * Check for single stepping in user-level priv
+         *   kind can be "normal", "ill", or "syscall"
+         * At end, if fall-thru
+         *   r29: thread_info->step_state
+         *   r28: &pt_regs->pc
+         *   r27: pt_regs->pc
+         *   r26: thread_info->step_state->buffer
+         */
+
+        /* Check for single stepping */
+        GET_THREAD_INFO(r29)
+        {
+         /* Get pointer to field holding step state */
+         addi   r29, r29, THREAD_INFO_STEP_STATE_OFFSET
+
+         /* Get pointer to EX1 in register state */
+         PTREGS_PTR(r27, PTREGS_OFFSET_EX1)
+        }
+        {
+         /* Get pointer to field holding PC */
+         PTREGS_PTR(r28, PTREGS_OFFSET_PC)
+
+         /* Load the pointer to the step state */
+         lw     r29, r29
+        }
+        /* Load EX1 */
+        lw      r27, r27
+        {
+         /* Points to flags */
+         addi   r23, r29, SINGLESTEP_STATE_FLAGS_OFFSET
+
+         /* No single stepping if there is no step state structure */
+         bzt    r29, \not_single_stepping
+        }
+        {
+         /* mask off ICS and any other high bits */
+         andi   r27, r27, SPR_EX_CONTEXT_1_1__PL_MASK
+
+         /* Load pointer to single step instruction buffer */
+         lw     r26, r29
+        }
+        /* Check priv state */
+        bnz     r27, \not_single_stepping
+
+        /* Get flags */
+        lw      r22, r23
+        {
+         /* Branch if single-step mode not enabled */
+         bbnst  r22, \not_single_stepping
+
+         /* Clear enabled flag */
+         andi   r22, r22, ~SINGLESTEP_STATE_MASK_IS_ENABLED
+        }
+        .ifc \kind,normal
+        {
+         /* Load PC */
+         lw     r27, r28
+
+         /* Point to the entry containing the original PC */
+         addi   r24, r29, SINGLESTEP_STATE_ORIG_PC_OFFSET
+        }
+        {
+         /* Disable single stepping flag */
+         sw     r23, r22
+        }
+        {
+         /* Get the original pc */
+         lw     r24, r24
+
+         /* See if the PC is at the start of the single step buffer */
+         seq    r25, r26, r27
+        }
+        /*
+         * NOTE: it is really expected that the PC be in the single step buffer
+         *       at this point
+         */
+        bzt     r25, \not_single_stepping
+
+        /* Restore the original PC */
+        sw      r28, r24
+        .else
+        .ifc \kind,syscall
+        {
+         /* Load PC */
+         lw     r27, r28
+
+         /* Point to the entry containing the next PC */
+         addi   r24, r29, SINGLESTEP_STATE_NEXT_PC_OFFSET
+        }
+        {
+         /* Increment the stopped PC by the bundle size */
+         addi   r26, r26, 8
+
+         /* Disable single stepping flag */
+         sw     r23, r22
+        }
+        {
+         /* Get the next pc */
+         lw     r24, r24
+
+         /*
+          * See if the PC is one bundle past the start of the
+          * single step buffer
+          */
+         seq    r25, r26, r27
+        }
+        {
+         /*
+          * NOTE: it is really expected that the PC be in the
+          * single step buffer at this point
+          */
+         bzt    r25, \not_single_stepping
+        }
+        /* Set to the next PC */
+        sw      r28, r24
+        .else
+        {
+         /* Point to 3rd bundle in buffer */
+         addi   r25, r26, 16
+
+         /* Load PC */
+         lw      r27, r28
+        }
+        {
+         /* Disable single stepping flag */
+         sw      r23, r22
+
+         /* See if the PC is in the single step buffer */
+         slte_u  r24, r26, r27
+        }
+        {
+         slte_u r25, r27, r25
+
+         /*
+          * NOTE: it is really expected that the PC be in the
+          * single step buffer at this point
+          */
+         bzt    r24, \not_single_stepping
+        }
+        bzt     r25, \not_single_stepping
+        .endif
+        .endif
+        .endm
+
+        /*
+         * Redispatch a downcall.
+         */
+        .macro  dc_dispatch vecnum, vecname
+        .org    (\vecnum << 8)
+intvec_\vecname:
+        j       hv_downcall_dispatch
+        ENDPROC(intvec_\vecname)
+        .endm
+
+        /*
+         * Common code for most interrupts.  The C function we're eventually
+         * going to is in r0, and the faultnum is in r1; the original
+         * values for those registers are on the stack.
+         */
+        .pushsection .text.handle_interrupt,"ax"
+handle_interrupt:
+        finish_interrupt_save handle_interrupt
+
+        /*
+         * Check for if we are single stepping in user level. If so, then
+         * we need to restore the PC.
+         */
+
+        check_single_stepping normal, .Ldispatch_interrupt
+.Ldispatch_interrupt:
+
+        /* Jump to the C routine; it should enable irqs as soon as possible. */
+        {
+         jalr   r0
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        }
+        FEEDBACK_REENTER(handle_interrupt)
+        {
+         movei  r30, 0   /* not an NMI */
+         j      interrupt_return
+        }
+        STD_ENDPROC(handle_interrupt)
+
+/*
+ * This routine takes a boolean in r30 indicating if this is an NMI.
+ * If so, we also expect a boolean in r31 indicating whether to
+ * re-enable the oprofile interrupts.
+ */
+STD_ENTRY(interrupt_return)
+        /* If we're resuming to kernel space, don't check thread flags. */
+        {
+         bnz    r30, .Lrestore_all  /* NMIs don't special-case user-space */
+         PTREGS_PTR(r29, PTREGS_OFFSET_EX1)
+        }
+        lw      r29, r29
+        andi    r29, r29, SPR_EX_CONTEXT_1_1__PL_MASK  /* mask off ICS */
+        {
+         bzt    r29, .Lresume_userspace
+         PTREGS_PTR(r29, PTREGS_OFFSET_PC)
+        }
+
+        /* If we're resuming to _cpu_idle_nap, bump PC forward by 8. */
+        {
+         lw     r28, r29
+         moveli r27, lo16(_cpu_idle_nap)
+        }
+        {
+         auli   r27, r27, ha16(_cpu_idle_nap)
+        }
+        {
+         seq    r27, r27, r28
+        }
+        {
+         bbns   r27, .Lrestore_all
+         addi   r28, r28, 8
+        }
+        sw      r29, r28
+        j       .Lrestore_all
+
+.Lresume_userspace:
+        FEEDBACK_REENTER(interrupt_return)
+
+        /*
+         * Disable interrupts so as to make sure we don't
+         * miss an interrupt that sets any of the thread flags (like
+         * need_resched or sigpending) between sampling and the iret.
+         * Routines like schedule() or do_signal() may re-enable
+         * interrupts before returning.
+         */
+        IRQ_DISABLE(r20, r21)
+        TRACE_IRQS_OFF  /* Note: clobbers registers r0-r29 */
+
+        /* Get base of stack in r32; note r30/31 are used as arguments here. */
+        GET_THREAD_INFO(r32)
+
+
+        /* Check to see if there is any work to do before returning to user. */
+        {
+         addi   r29, r32, THREAD_INFO_FLAGS_OFFSET
+         moveli r28, lo16(_TIF_ALLWORK_MASK)
+        }
+        {
+         lw     r29, r29
+         auli   r28, r28, ha16(_TIF_ALLWORK_MASK)
+        }
+        and     r28, r29, r28
+        bnz     r28, .Lwork_pending
+
+        /*
+         * In the NMI case we
+         * omit the call to single_process_check_nohz, which normally checks
+         * to see if we should start or stop the scheduler tick, because
+         * we can't call arbitrary Linux code from an NMI context.
+         * We always call the homecache TLB deferral code to re-trigger
+         * the deferral mechanism.
+         *
+         * The other chunk of responsibility this code has is to reset the
+         * interrupt masks appropriately to reset irqs and NMIs.  We have
+         * to call TRACE_IRQS_OFF and TRACE_IRQS_ON to support all the
+         * lockdep-type stuff, but we can't set ICS until afterwards, since
+         * ICS can only be used in very tight chunks of code to avoid
+         * tripping over various assertions that it is off.
+         *
+         * (There is what looks like a window of vulnerability here since
+         * we might take a profile interrupt between the two SPR writes
+         * that set the mask, but since we write the low SPR word first,
+         * and our interrupt entry code checks the low SPR word, any
+         * profile interrupt will actually disable interrupts in both SPRs
+         * before returning, which is OK.)
+         */
+.Lrestore_all:
+        PTREGS_PTR(r0, PTREGS_OFFSET_EX1)
+        {
+         lw     r0, r0
+         PTREGS_PTR(r32, PTREGS_OFFSET_FLAGS)
+        }
+        {
+         andi   r0, r0, SPR_EX_CONTEXT_1_1__PL_MASK
+         lw     r32, r32
+        }
+        bnz    r0, 1f
+        j       2f
+#if PT_FLAGS_DISABLE_IRQ != 1
+# error Assuming PT_FLAGS_DISABLE_IRQ == 1 so we can use bbnst below
+#endif
+1:      bbnst   r32, 2f
+        IRQ_DISABLE(r20,r21)
+        TRACE_IRQS_OFF
+        movei   r0, 1
+        mtspr   INTERRUPT_CRITICAL_SECTION, r0
+        bzt     r30, .Lrestore_regs
+        j       3f
+2:      TRACE_IRQS_ON
+        movei   r0, 1
+        mtspr   INTERRUPT_CRITICAL_SECTION, r0
+        IRQ_ENABLE(r20, r21)
+        bzt     r30, .Lrestore_regs
+3:
+
+
+        /*
+         * We now commit to returning from this interrupt, since we will be
+         * doing things like setting EX_CONTEXT SPRs and unwinding the stack
+         * frame.  No calls should be made to any other code after this point.
+         * This code should only be entered with ICS set.
+         * r32 must still be set to ptregs.flags.
+         * We launch loads to each cache line separately first, so we can
+         * get some parallelism out of the memory subsystem.
+         * We start zeroing caller-saved registers throughout, since
+         * that will save some cycles if this turns out to be a syscall.
+         */
+.Lrestore_regs:
+        FEEDBACK_REENTER(interrupt_return)   /* called from elsewhere */
+
+        /*
+         * Rotate so we have one high bit and one low bit to test.
+         * - low bit says whether to restore all the callee-saved registers,
+         *   or just r30-r33, and r52 up.
+         * - high bit (i.e. sign bit) says whether to restore all the
+         *   caller-saved registers, or just r0.
+         */
+#if PT_FLAGS_CALLER_SAVES != 2 || PT_FLAGS_RESTORE_REGS != 4
+# error Rotate trick does not work :-)
+#endif
+        {
+         rli    r20, r32, 30
+         PTREGS_PTR(sp, PTREGS_OFFSET_REG(0))
+        }
+
+        /*
+         * Load cache lines 0, 2, and 3 in that order, then use
+         * the last loaded value, which makes it likely that the other
+         * cache lines have also loaded, at which point we should be
+         * able to safely read all the remaining words on those cache
+         * lines without waiting for the memory subsystem.
+         */
+        pop_reg_zero r0, r28, sp, PTREGS_OFFSET_REG(30) - PTREGS_OFFSET_REG(0)
+        pop_reg_zero r30, r2, sp, PTREGS_OFFSET_PC - PTREGS_OFFSET_REG(30)
+        pop_reg_zero r21, r3, sp, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC
+        pop_reg_zero lr, r4, sp, PTREGS_OFFSET_REG(52) - PTREGS_OFFSET_EX1
+        {
+         mtspr  EX_CONTEXT_1_0, r21
+         move   r5, zero
+        }
+        {
+         mtspr  EX_CONTEXT_1_1, lr
+         andi   lr, lr, SPR_EX_CONTEXT_1_1__PL_MASK  /* mask off ICS */
+        }
+
+        /* Restore callee-saveds that we actually use. */
+        pop_reg_zero r52, r6, sp, PTREGS_OFFSET_REG(31) - PTREGS_OFFSET_REG(52)
+        pop_reg_zero r31, r7
+        pop_reg_zero r32, r8
+        pop_reg_zero r33, r9, sp, PTREGS_OFFSET_REG(29) - PTREGS_OFFSET_REG(33)
+
+        /*
+         * If we modified other callee-saveds, restore them now.
+         * This is rare, but could be via ptrace or signal handler.
+         */
+        {
+         move   r10, zero
+         bbs    r20, .Lrestore_callees
+        }
+.Lcontinue_restore_regs:
+
+        /* Check if we're returning from a syscall. */
+        {
+         move   r11, zero
+         blzt   r20, 1f  /* no, so go restore callee-save registers */
+        }
+
+        /*
+         * Check if we're returning to userspace.
+         * Note that if we're not, we don't worry about zeroing everything.
+         */
+        {
+         addli  sp, sp, PTREGS_OFFSET_LR - PTREGS_OFFSET_REG(29)
+         bnz    lr, .Lkernel_return
+        }
+
+        /*
+         * On return from syscall, we've restored r0 from pt_regs, but we
+         * clear the remainder of the caller-saved registers.  We could
+         * restore the syscall arguments, but there's not much point,
+         * and it ensures user programs aren't trying to use the
+         * caller-saves if we clear them, as well as avoiding leaking
+         * kernel pointers into userspace.
+         */
+        pop_reg_zero lr, r12, sp, PTREGS_OFFSET_TP - PTREGS_OFFSET_LR
+        pop_reg_zero tp, r13, sp, PTREGS_OFFSET_SP - PTREGS_OFFSET_TP
+        {
+         lw     sp, sp
+         move   r14, zero
+         move   r15, zero
+        }
+        { move r16, zero; move r17, zero }
+        { move r18, zero; move r19, zero }
+        { move r20, zero; move r21, zero }
+        { move r22, zero; move r23, zero }
+        { move r24, zero; move r25, zero }
+        { move r26, zero; move r27, zero }
+
+        /* Set r1 to errno if we are returning an error, otherwise zero. */
+        {
+         moveli r29, 1024
+         sub    r1, zero, r0
+        }
+        slt_u   r29, r1, r29
+        {
+         mnz    r1, r29, r1
+         move   r29, zero
+        }
+        iret
+
+        /*
+         * Not a syscall, so restore caller-saved registers.
+         * First kick off a load for cache line 1, which we're touching
+         * for the first time here.
+         */
+        .align 64
+1:      pop_reg r29, sp, PTREGS_OFFSET_REG(1) - PTREGS_OFFSET_REG(29)
+        pop_reg r1
+        pop_reg r2
+        pop_reg r3
+        pop_reg r4
+        pop_reg r5
+        pop_reg r6
+        pop_reg r7
+        pop_reg r8
+        pop_reg r9
+        pop_reg r10
+        pop_reg r11
+        pop_reg r12
+        pop_reg r13
+        pop_reg r14
+        pop_reg r15
+        pop_reg r16
+        pop_reg r17
+        pop_reg r18
+        pop_reg r19
+        pop_reg r20
+        pop_reg r21
+        pop_reg r22
+        pop_reg r23
+        pop_reg r24
+        pop_reg r25
+        pop_reg r26
+        pop_reg r27
+        pop_reg r28, sp, PTREGS_OFFSET_LR - PTREGS_OFFSET_REG(28)
+        /* r29 already restored above */
+        bnz     lr, .Lkernel_return
+        pop_reg lr, sp, PTREGS_OFFSET_TP - PTREGS_OFFSET_LR
+        pop_reg tp, sp, PTREGS_OFFSET_SP - PTREGS_OFFSET_TP
+        lw      sp, sp
+        iret
+
+        /*
+         * We can't restore tp when in kernel mode, since a thread might
+         * have migrated from another cpu and brought a stale tp value.
+         */
+.Lkernel_return:
+        pop_reg lr, sp, PTREGS_OFFSET_SP - PTREGS_OFFSET_LR
+        lw      sp, sp
+        iret
+
+        /* Restore callee-saved registers from r34 to r51. */
+.Lrestore_callees:
+        addli  sp, sp, PTREGS_OFFSET_REG(34) - PTREGS_OFFSET_REG(29)
+        pop_reg r34
+        pop_reg r35
+        pop_reg r36
+        pop_reg r37
+        pop_reg r38
+        pop_reg r39
+        pop_reg r40
+        pop_reg r41
+        pop_reg r42
+        pop_reg r43
+        pop_reg r44
+        pop_reg r45
+        pop_reg r46
+        pop_reg r47
+        pop_reg r48
+        pop_reg r49
+        pop_reg r50
+        pop_reg r51, sp, PTREGS_OFFSET_REG(29) - PTREGS_OFFSET_REG(51)
+        j .Lcontinue_restore_regs
+
+.Lwork_pending:
+        /* Mask the reschedule flag */
+        andi    r28, r29, _TIF_NEED_RESCHED
+
+        {
+         /*
+          * If the NEED_RESCHED flag is called, we call schedule(), which
+          * may drop this context right here and go do something else.
+          * On return, jump back to .Lresume_userspace and recheck.
+          */
+         bz     r28, .Lasync_tlb
+
+         /* Mask the async-tlb flag */
+         andi   r28, r29, _TIF_ASYNC_TLB
+        }
+
+        jal     schedule
+        FEEDBACK_REENTER(interrupt_return)
+
+        /* Reload the flags and check again */
+        j       .Lresume_userspace
+
+.Lasync_tlb:
+        {
+         bz     r28, .Lneed_sigpending
+
+         /* Mask the sigpending flag */
+         andi   r28, r29, _TIF_SIGPENDING
+        }
+
+        PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        jal     do_async_page_fault
+        FEEDBACK_REENTER(interrupt_return)
+
+        /*
+         * Go restart the "resume userspace" process.  We may have
+         * fired a signal, and we need to disable interrupts again.
+         */
+        j       .Lresume_userspace
+
+.Lneed_sigpending:
+        /*
+         * At this point we are either doing signal handling or single-step,
+         * so either way make sure we have all the registers saved.
+         */
+        push_extra_callee_saves r0
+
+        {
+         /* If no signal pending, skip to singlestep check */
+         bz     r28, .Lneed_singlestep
+
+         /* Mask the singlestep flag */
+         andi   r28, r29, _TIF_SINGLESTEP
+        }
+
+        jal     do_signal
+        FEEDBACK_REENTER(interrupt_return)
+
+        /* Reload the flags and check again */
+        j       .Lresume_userspace
+
+.Lneed_singlestep:
+        {
+         /* Get a pointer to the EX1 field */
+         PTREGS_PTR(r29, PTREGS_OFFSET_EX1)
+
+         /* If we get here, our bit must be set. */
+         bz     r28, .Lwork_confusion
+        }
+        /* If we are in priv mode, don't single step */
+        lw      r28, r29
+        andi    r28, r28, SPR_EX_CONTEXT_1_1__PL_MASK  /* mask off ICS */
+        bnz     r28, .Lrestore_all
+
+        /* Allow interrupts within the single step code */
+        TRACE_IRQS_ON  /* Note: clobbers registers r0-r29 */
+        IRQ_ENABLE(r20, r21)
+
+        /* try to single-step the current instruction */
+        PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        jal     single_step_once
+        FEEDBACK_REENTER(interrupt_return)
+
+        /* Re-disable interrupts.  TRACE_IRQS_OFF in .Lrestore_all. */
+        IRQ_DISABLE(r20,r21)
+
+        j       .Lrestore_all
+
+.Lwork_confusion:
+        move    r0, r28
+        panic   "thread_info allwork flags unhandled on userspace resume: %#x"
+
+        STD_ENDPROC(interrupt_return)
+
+        /*
+         * This interrupt variant clears the INT_INTCTRL_1 interrupt mask bit
+         * before returning, so we can properly get more downcalls.
+         */
+        .pushsection .text.handle_interrupt_downcall,"ax"
+handle_interrupt_downcall:
+        finish_interrupt_save handle_interrupt_downcall
+        check_single_stepping normal, .Ldispatch_downcall
+.Ldispatch_downcall:
+
+        /* Clear INTCTRL_1 from the set of interrupts we ever enable. */
+        GET_INTERRUPTS_ENABLED_MASK_PTR(r30)
+        {
+         addi   r30, r30, 4
+         movei  r31, INT_MASK(INT_INTCTRL_1)
+        }
+        {
+         lw     r20, r30
+         nor    r21, r31, zero
+        }
+        and     r20, r20, r21
+        sw      r30, r20
+
+        {
+         jalr   r0
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        }
+        FEEDBACK_REENTER(handle_interrupt_downcall)
+
+        /* Allow INTCTRL_1 to be enabled next time we enable interrupts. */
+        lw      r20, r30
+        or      r20, r20, r31
+        sw      r30, r20
+
+        {
+         movei  r30, 0   /* not an NMI */
+         j      interrupt_return
+        }
+        STD_ENDPROC(handle_interrupt_downcall)
+
+        /*
+         * Some interrupts don't check for single stepping
+         */
+        .pushsection .text.handle_interrupt_no_single_step,"ax"
+handle_interrupt_no_single_step:
+        finish_interrupt_save handle_interrupt_no_single_step
+        {
+         jalr   r0
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        }
+        FEEDBACK_REENTER(handle_interrupt_no_single_step)
+        {
+         movei  r30, 0   /* not an NMI */
+         j      interrupt_return
+        }
+        STD_ENDPROC(handle_interrupt_no_single_step)
+
+        /*
+         * "NMI" interrupts mask ALL interrupts before calling the
+         * handler, and don't check thread flags, etc., on the way
+         * back out.  In general, the only things we do here for NMIs
+         * are the register save/restore, fixing the PC if we were
+         * doing single step, and the dataplane kernel-TLB management.
+         * We don't (for example) deal with start/stop of the sched tick.
+         */
+        .pushsection .text.handle_nmi,"ax"
+handle_nmi:
+        finish_interrupt_save handle_nmi
+        check_single_stepping normal, .Ldispatch_nmi
+.Ldispatch_nmi:
+        {
+         jalr   r0
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        }
+        FEEDBACK_REENTER(handle_nmi)
+        j       interrupt_return
+        STD_ENDPROC(handle_nmi)
+
+        /*
+         * Parallel code for syscalls to handle_interrupt.
+         */
+        .pushsection .text.handle_syscall,"ax"
+handle_syscall:
+        finish_interrupt_save handle_syscall
+
+        /*
+         * Check for if we are single stepping in user level. If so, then
+         * we need to restore the PC.
+         */
+        check_single_stepping syscall, .Ldispatch_syscall
+.Ldispatch_syscall:
+
+        /* Enable irqs. */
+        TRACE_IRQS_ON
+        IRQ_ENABLE(r20, r21)
+
+        /* Bump the counter for syscalls made on this tile. */
+        moveli  r20, lo16(irq_stat + IRQ_CPUSTAT_SYSCALL_COUNT_OFFSET)
+        auli    r20, r20, ha16(irq_stat + IRQ_CPUSTAT_SYSCALL_COUNT_OFFSET)
+        add     r20, r20, tp
+        lw      r21, r20
+        addi    r21, r21, 1
+        sw      r20, r21
+
+        /* Trace syscalls, if requested. */
+        GET_THREAD_INFO(r31)
+        addi    r31, r31, THREAD_INFO_FLAGS_OFFSET
+        lw      r30, r31
+        andi    r30, r30, _TIF_SYSCALL_TRACE
+        bzt     r30, .Lrestore_syscall_regs
+        jal     do_syscall_trace
+        FEEDBACK_REENTER(handle_syscall)
+
+        /*
+         * We always reload our registers from the stack at this
+         * point.  They might be valid, if we didn't build with
+         * TRACE_IRQFLAGS, and this isn't a dataplane tile, and we're not
+         * doing syscall tracing, but there are enough cases now that it
+         * seems simplest just to do the reload unconditionally.
+         */
+.Lrestore_syscall_regs:
+        PTREGS_PTR(r11, PTREGS_OFFSET_REG(0))
+        pop_reg r0, r11
+        pop_reg r1, r11
+        pop_reg r2, r11
+        pop_reg r3, r11
+        pop_reg r4, r11
+        pop_reg r5, r11, PTREGS_OFFSET_SYSCALL - PTREGS_OFFSET_REG(5)
+        pop_reg TREG_SYSCALL_NR_NAME, r11
+
+        /* Ensure that the syscall number is within the legal range. */
+        moveli  r21, __NR_syscalls
+        {
+         slt_u  r21, TREG_SYSCALL_NR_NAME, r21
+         moveli r20, lo16(sys_call_table)
+        }
+        {
+         bbns   r21, .Linvalid_syscall
+         auli   r20, r20, ha16(sys_call_table)
+        }
+        s2a     r20, TREG_SYSCALL_NR_NAME, r20
+        lw      r20, r20
+
+        /* Jump to syscall handler. */
+        jalr    r20; .Lhandle_syscall_link:
+        FEEDBACK_REENTER(handle_syscall)
+
+        /*
+         * Write our r0 onto the stack so it gets restored instead
+         * of whatever the user had there before.
+         */
+        PTREGS_PTR(r29, PTREGS_OFFSET_REG(0))
+        sw      r29, r0
+
+        /* Do syscall trace again, if requested. */
+        lw      r30, r31
+        andi    r30, r30, _TIF_SYSCALL_TRACE
+        bzt     r30, 1f
+        jal     do_syscall_trace
+        FEEDBACK_REENTER(handle_syscall)
+1:      j       .Lresume_userspace   /* jump into middle of interrupt_return */
+
+.Linvalid_syscall:
+        /* Report an invalid syscall back to the user program */
+        {
+         PTREGS_PTR(r29, PTREGS_OFFSET_REG(0))
+         movei  r28, -ENOSYS
+        }
+        sw      r29, r28
+        j       .Lresume_userspace   /* jump into middle of interrupt_return */
+        STD_ENDPROC(handle_syscall)
+
+        /* Return the address for oprofile to suppress in backtraces. */
+STD_ENTRY_SECTION(handle_syscall_link_address, .text.handle_syscall)
+        lnk     r0
+        {
+         addli  r0, r0, .Lhandle_syscall_link - .
+         jrp    lr
+        }
+        STD_ENDPROC(handle_syscall_link_address)
+
+STD_ENTRY(ret_from_fork)
+        jal     sim_notify_fork
+        jal     schedule_tail
+        FEEDBACK_REENTER(ret_from_fork)
+        j       .Lresume_userspace   /* jump into middle of interrupt_return */
+        STD_ENDPROC(ret_from_fork)
+
+        /*
+         * Code for ill interrupt.
+         */
+        .pushsection .text.handle_ill,"ax"
+handle_ill:
+        finish_interrupt_save handle_ill
+
+        /*
+         * Check for if we are single stepping in user level. If so, then
+         * we need to restore the PC.
+         */
+        check_single_stepping ill, .Ldispatch_normal_ill
+
+        {
+         /* See if the PC is the 1st bundle in the buffer */
+         seq    r25, r27, r26
+
+         /* Point to the 2nd bundle in the buffer */
+         addi   r26, r26, 8
+        }
+        {
+         /* Point to the original pc */
+         addi   r24, r29, SINGLESTEP_STATE_ORIG_PC_OFFSET
+
+         /* Branch if the PC is the 1st bundle in the buffer */
+         bnz    r25, 3f
+        }
+        {
+         /* See if the PC is the 2nd bundle of the buffer */
+         seq    r25, r27, r26
+
+         /* Set PC to next instruction */
+         addi   r24, r29, SINGLESTEP_STATE_NEXT_PC_OFFSET
+        }
+        {
+         /* Point to flags */
+         addi   r25, r29, SINGLESTEP_STATE_FLAGS_OFFSET
+
+         /* Branch if PC is in the second bundle */
+         bz     r25, 2f
+        }
+        /* Load flags */
+        lw      r25, r25
+        {
+         /*
+          * Get the offset for the register to restore
+          * Note: the lower bound is 2, so we have implicit scaling by 4.
+          *  No multiplication of the register number by the size of a register
+          *  is needed.
+          */
+         mm     r27, r25, zero, SINGLESTEP_STATE_TARGET_LB, \
+                SINGLESTEP_STATE_TARGET_UB
+
+         /* Mask Rewrite_LR */
+         andi   r25, r25, SINGLESTEP_STATE_MASK_UPDATE
+        }
+        {
+         addi   r29, r29, SINGLESTEP_STATE_UPDATE_VALUE_OFFSET
+
+         /* Don't rewrite temp register */
+         bz     r25, 3f
+        }
+        {
+         /* Get the temp value */
+         lw     r29, r29
+
+         /* Point to where the register is stored */
+         add    r27, r27, sp
+        }
+
+        /* Add in the C ABI save area size to the register offset */
+        addi    r27, r27, C_ABI_SAVE_AREA_SIZE
+
+        /* Restore the user's register with the temp value */
+        sw      r27, r29
+        j       3f
+
+2:
+        /* Must be in the third bundle */
+        addi    r24, r29, SINGLESTEP_STATE_BRANCH_NEXT_PC_OFFSET
+
+3:
+        /* set PC and continue */
+        lw      r26, r24
+        sw      r28, r26
+
+        /* Clear TIF_SINGLESTEP */
+        GET_THREAD_INFO(r0)
+
+        addi    r1, r0, THREAD_INFO_FLAGS_OFFSET
+        {
+         lw     r2, r1
+         addi   r0, r0, THREAD_INFO_TASK_OFFSET  /* currently a no-op */
+        }
+        andi    r2, r2, ~_TIF_SINGLESTEP
+        sw      r1, r2
+
+        /* Issue a sigtrap */
+        {
+         lw     r0, r0          /* indirect thru thread_info to get task_info*/
+         addi   r1, sp, C_ABI_SAVE_AREA_SIZE  /* put ptregs pointer into r1 */
+         move   r2, zero        /* load error code into r2 */
+        }
+
+        jal     send_sigtrap    /* issue a SIGTRAP */
+        FEEDBACK_REENTER(handle_ill)
+        j       .Lresume_userspace   /* jump into middle of interrupt_return */
+
+.Ldispatch_normal_ill:
+        {
+         jalr   r0
+         PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+        }
+        FEEDBACK_REENTER(handle_ill)
+        {
+         movei  r30, 0   /* not an NMI */
+         j      interrupt_return
+        }
+        STD_ENDPROC(handle_ill)
+
+        .pushsection .rodata, "a"
+        .align  8
+bpt_code:
+        bpt
+        ENDPROC(bpt_code)
+        .popsection
+
+/* Various stub interrupt handlers and syscall handlers */
+
+STD_ENTRY_LOCAL(_kernel_double_fault)
+        mfspr   r1, EX_CONTEXT_1_0
+        move    r2, lr
+        move    r3, sp
+        move    r4, r52
+        addi    sp, sp, -C_ABI_SAVE_AREA_SIZE
+        j       kernel_double_fault
+        STD_ENDPROC(_kernel_double_fault)
+
+STD_ENTRY_LOCAL(bad_intr)
+        mfspr   r2, EX_CONTEXT_1_0
+        panic   "Unhandled interrupt %#x: PC %#lx"
+        STD_ENDPROC(bad_intr)
+
+/* Put address of pt_regs in reg and jump. */
+#define PTREGS_SYSCALL(x, reg)                          \
+        STD_ENTRY(x);                                   \
+        {                                               \
+         PTREGS_PTR(reg, PTREGS_OFFSET_BASE);           \
+         j      _##x                                    \
+        };                                              \
+        STD_ENDPROC(x)
+
+PTREGS_SYSCALL(sys_execve, r3)
+PTREGS_SYSCALL(sys_sigaltstack, r2)
+PTREGS_SYSCALL(sys_rt_sigreturn, r0)
+
+/* Save additional callee-saves to pt_regs, put address in reg and jump. */
+#define PTREGS_SYSCALL_ALL_REGS(x, reg)                 \
+        STD_ENTRY(x);                                   \
+        push_extra_callee_saves reg;                    \
+        j       _##x;                                   \
+        STD_ENDPROC(x)
+
+PTREGS_SYSCALL_ALL_REGS(sys_fork, r0)
+PTREGS_SYSCALL_ALL_REGS(sys_vfork, r0)
+PTREGS_SYSCALL_ALL_REGS(sys_clone, r4)
+PTREGS_SYSCALL_ALL_REGS(sys_cmpxchg_badaddr, r1)
+
+/*
+ * This entrypoint is taken for the cmpxchg and atomic_update fast
+ * swints.  We may wish to generalize it to other fast swints at some
+ * point, but for now there are just two very similar ones, which
+ * makes it faster.
+ *
+ * The fast swint code is designed to have a small footprint.  It does
+ * not save or restore any GPRs, counting on the caller-save registers
+ * to be available to it on entry.  It does not modify any callee-save
+ * registers (including "lr").  It does not check what PL it is being
+ * called at, so you'd better not call it other than at PL0.
+ *
+ * It does not use the stack, but since it might be re-interrupted by
+ * a page fault which would assume the stack was valid, it does
+ * save/restore the stack pointer and zero it out to make sure it gets reset.
+ * Since we always keep interrupts disabled, the hypervisor won't
+ * clobber our EX_CONTEXT_1_x registers, so we don't save/restore them
+ * (other than to advance the PC on return).
+ *
+ * We have to manually validate the user vs kernel address range
+ * (since at PL1 we can read/write both), and for performance reasons
+ * we don't allow cmpxchg on the fc000000 memory region, since we only
+ * validate that the user address is below PAGE_OFFSET.
+ *
+ * We place it in the __HEAD section to ensure it is relatively
+ * near to the intvec_SWINT_1 code (reachable by a conditional branch).
+ *
+ * Must match register usage in do_page_fault().
+ */
+        __HEAD
+        .align 64
+        /* Align much later jump on the start of a cache line. */
+#if !ATOMIC_LOCKS_FOUND_VIA_TABLE()
+        nop; nop
+#endif
+ENTRY(sys_cmpxchg)
+
+        /*
+         * Save "sp" and set it zero for any possible page fault.
+         *
+         * HACK: We want to both zero sp and check r0's alignment,
+         * so we do both at once. If "sp" becomes nonzero we
+         * know r0 is unaligned and branch to the error handler that
+         * restores sp, so this is OK.
+         *
+         * ICS is disabled right now so having a garbage but nonzero
+         * sp is OK, since we won't execute any faulting instructions
+         * when it is nonzero.
+         */
+        {
+         move   r27, sp
+         andi   sp, r0, 3
+        }
+
+        /*
+         * Get the lock address in ATOMIC_LOCK_REG, and also validate that the
+         * address is less than PAGE_OFFSET, since that won't trap at PL1.
+         * We only use bits less than PAGE_SHIFT to avoid having to worry
+         * about aliasing among multiple mappings of the same physical page,
+         * and we ignore the low 3 bits so we have one lock that covers
+         * both a cmpxchg64() and a cmpxchg() on either its low or high word.
+         * NOTE: this code must match __atomic_hashed_lock() in lib/atomic.c.
+         */
+
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+        {
+         /* Check for unaligned input. */
+         bnz    sp, .Lcmpxchg_badaddr
+         mm     r25, r0, zero, 3, PAGE_SHIFT-1
+        }
+        {
+         crc32_32 r25, zero, r25
+         moveli r21, lo16(atomic_lock_ptr)
+        }
+        {
+         auli   r21, r21, ha16(atomic_lock_ptr)
+         auli   r23, zero, hi16(PAGE_OFFSET)  /* hugepage-aligned */
+        }
+        {
+         shri   r20, r25, 32 - ATOMIC_HASH_L1_SHIFT
+         slt_u  r23, r0, r23
+
+         /*
+          * Ensure that the TLB is loaded before we take out the lock.
+          * On TILEPro, this will start fetching the value all the way
+          * into our L1 as well (and if it gets modified before we
+          * grab the lock, it will be invalidated from our cache
+          * before we reload it).  On tile64, we'll start fetching it
+          * into our L1 if we're the home, and if we're not, we'll
+          * still at least start fetching it into the home's L2.
+          */
+         lw     r26, r0
+        }
+        {
+         s2a    r21, r20, r21
+         bbns   r23, .Lcmpxchg_badaddr
+        }
+        {
+         lw     r21, r21
+         seqi   r23, TREG_SYSCALL_NR_NAME, __NR_FAST_cmpxchg64
+         andi   r25, r25, ATOMIC_HASH_L2_SIZE - 1
+        }
+        {
+         /* Branch away at this point if we're doing a 64-bit cmpxchg. */
+         bbs    r23, .Lcmpxchg64
+         andi   r23, r0, 7       /* Precompute alignment for cmpxchg64. */
+        }
+
+        {
+         /*
+          * We very carefully align the code that actually runs with
+          * the lock held (nine bundles) so that we know it is all in
+          * the icache when we start.  This instruction (the jump) is
+          * at the start of the first cache line, address zero mod 64;
+          * we jump to somewhere in the second cache line to issue the
+          * tns, then jump back to finish up.
+          */
+         s2a    ATOMIC_LOCK_REG_NAME, r25, r21
+         j      .Lcmpxchg32_tns
+        }
+
+#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+        {
+         /* Check for unaligned input. */
+         bnz    sp, .Lcmpxchg_badaddr
+         auli   r23, zero, hi16(PAGE_OFFSET)  /* hugepage-aligned */
+        }
+        {
+         /*
+          * Slide bits into position for 'mm'. We want to ignore
+          * the low 3 bits of r0, and consider only the next
+          * ATOMIC_HASH_SHIFT bits.
+          * Because of C pointer arithmetic, we want to compute this:
+          *
+          * ((char*)atomic_locks +
+          *  (((r0 >> 3) & (1 << (ATOMIC_HASH_SIZE - 1))) << 2))
+          *
+          * Instead of two shifts we just ">> 1", and use 'mm'
+          * to ignore the low and high bits we don't want.
+          */
+         shri   r25, r0, 1
+
+         slt_u  r23, r0, r23
+
+         /*
+          * Ensure that the TLB is loaded before we take out the lock.
+          * On tilepro, this will start fetching the value all the way
+          * into our L1 as well (and if it gets modified before we
+          * grab the lock, it will be invalidated from our cache
+          * before we reload it).  On tile64, we'll start fetching it
+          * into our L1 if we're the home, and if we're not, we'll
+          * still at least start fetching it into the home's L2.
+          */
+         lw     r26, r0
+        }
+        {
+         /* atomic_locks is page aligned so this suffices to get its addr. */
+         auli   r21, zero, hi16(atomic_locks)
+
+         bbns   r23, .Lcmpxchg_badaddr
+        }
+        {
+         /*
+          * Insert the hash bits into the page-aligned pointer.
+          * ATOMIC_HASH_SHIFT is so big that we don't actually hash
+          * the unmasked address bits, as that may cause unnecessary
+          * collisions.
+          */
+         mm     ATOMIC_LOCK_REG_NAME, r25, r21, 2, (ATOMIC_HASH_SHIFT + 2) - 1
+
+         seqi   r23, TREG_SYSCALL_NR_NAME, __NR_FAST_cmpxchg64
+        }
+        {
+         /* Branch away at this point if we're doing a 64-bit cmpxchg. */
+         bbs    r23, .Lcmpxchg64
+         andi   r23, r0, 7       /* Precompute alignment for cmpxchg64. */
+        }
+        {
+         /*
+          * We very carefully align the code that actually runs with
+          * the lock held (nine bundles) so that we know it is all in
+          * the icache when we start.  This instruction (the jump) is
+          * at the start of the first cache line, address zero mod 64;
+          * we jump to somewhere in the second cache line to issue the
+          * tns, then jump back to finish up.
+          */
+         j      .Lcmpxchg32_tns
+        }
+
+#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+        ENTRY(__sys_cmpxchg_grab_lock)
+
+        /*
+         * Perform the actual cmpxchg or atomic_update.
+         * Note that __futex_mark_unlocked() in uClibc relies on
+         * atomic_update() to always perform an "mf", so don't make
+         * it optional or conditional without modifying that code.
+         */
+.Ldo_cmpxchg32:
+        {
+         lw     r21, r0
+         seqi   r23, TREG_SYSCALL_NR_NAME, __NR_FAST_atomic_update
+         move   r24, r2
+        }
+        {
+         seq    r22, r21, r1     /* See if cmpxchg matches. */
+         and    r25, r21, r1     /* If atomic_update, compute (*mem & mask) */
+        }
+        {
+         or     r22, r22, r23    /* Skip compare branch for atomic_update. */
+         add    r25, r25, r2     /* Compute (*mem & mask) + addend. */
+        }
+        {
+         mvnz   r24, r23, r25    /* Use atomic_update value if appropriate. */
+         bbns   r22, .Lcmpxchg32_mismatch
+        }
+        sw      r0, r24
+
+        /* Do slow mtspr here so the following "mf" waits less. */
+        {
+         move   sp, r27
+         mtspr  EX_CONTEXT_1_0, r28
+        }
+        mf
+
+        /* The following instruction is the start of the second cache line. */
+        {
+         move   r0, r21
+         sw     ATOMIC_LOCK_REG_NAME, zero
+        }
+        iret
+
+        /* Duplicated code here in the case where we don't overlap "mf" */
+.Lcmpxchg32_mismatch:
+        {
+         move   r0, r21
+         sw     ATOMIC_LOCK_REG_NAME, zero
+        }
+        {
+         move   sp, r27
+         mtspr  EX_CONTEXT_1_0, r28
+        }
+        iret
+
+        /*
+         * The locking code is the same for 32-bit cmpxchg/atomic_update,
+         * and for 64-bit cmpxchg.  We provide it as a macro and put
+         * it into both versions.  We can't share the code literally
+         * since it depends on having the right branch-back address.
+         * Note that the first few instructions should share the cache
+         * line with the second half of the actual locked code.
+         */
+        .macro  cmpxchg_lock, bitwidth
+
+        /* Lock; if we succeed, jump back up to the read-modify-write. */
+#ifdef CONFIG_SMP
+        tns     r21, ATOMIC_LOCK_REG_NAME
+#else
+        /*
+         * Non-SMP preserves all the lock infrastructure, to keep the
+         * code simpler for the interesting (SMP) case.  However, we do
+         * one small optimization here and in atomic_asm.S, which is
+         * to fake out acquiring the actual lock in the atomic_lock table.
+         */
+        movei   r21, 0
+#endif
+
+        /* Issue the slow SPR here while the tns result is in flight. */
+        mfspr   r28, EX_CONTEXT_1_0
+
+        {
+         addi   r28, r28, 8    /* return to the instruction after the swint1 */
+         bzt    r21, .Ldo_cmpxchg\bitwidth
+        }
+        /*
+         * The preceding instruction is the last thing that must be
+         * on the second cache line.
+         */
+
+#ifdef CONFIG_SMP
+        /*
+         * We failed to acquire the tns lock on our first try.  Now use
+         * bounded exponential backoff to retry, like __atomic_spinlock().
+         */
+        {
+         moveli r23, 2048       /* maximum backoff time in cycles */
+         moveli r25, 32         /* starting backoff time in cycles */
+        }
+1:      mfspr   r26, CYCLE_LOW  /* get start point for this backoff */
+2:      mfspr   r22, CYCLE_LOW  /* test to see if we've backed off enough */
+        sub     r22, r22, r26
+        slt     r22, r22, r25
+        bbst    r22, 2b
+        {
+         shli   r25, r25, 1     /* double the backoff; retry the tns */
+         tns    r21, ATOMIC_LOCK_REG_NAME
+        }
+        slt     r26, r23, r25   /* is the proposed backoff too big? */
+        {
+         mvnz   r25, r26, r23
+         bzt    r21, .Ldo_cmpxchg\bitwidth
+        }
+        j       1b
+#endif /* CONFIG_SMP */
+        .endm
+
+.Lcmpxchg32_tns:
+        cmpxchg_lock 32
+
+        /*
+         * This code is invoked from sys_cmpxchg after most of the
+         * preconditions have been checked.  We still need to check
+         * that r0 is 8-byte aligned, since if it's not we won't
+         * actually be atomic.  However, ATOMIC_LOCK_REG has the atomic
+         * lock pointer and r27/r28 have the saved SP/PC.
+         * r23 is holding "r0 & 7" so we can test for alignment.
+         * The compare value is in r2/r3; the new value is in r4/r5.
+         * On return, we must put the old value in r0/r1.
+         */
+        .align 64
+.Lcmpxchg64:
+        {
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+         s2a    ATOMIC_LOCK_REG_NAME, r25, r21
+#endif
+         bzt     r23, .Lcmpxchg64_tns
+        }
+        j       .Lcmpxchg_badaddr
+
+.Ldo_cmpxchg64:
+        {
+         lw     r21, r0
+         addi   r25, r0, 4
+        }
+        {
+         lw     r1, r25
+        }
+        seq     r26, r21, r2
+        {
+         bz     r26, .Lcmpxchg64_mismatch
+         seq    r26, r1, r3
+        }
+        {
+         bz     r26, .Lcmpxchg64_mismatch
+        }
+        sw      r0, r4
+        sw      r25, r5
+
+        /*
+         * The 32-bit path provides optimized "match" and "mismatch"
+         * iret paths, but we don't have enough bundles in this cache line
+         * to do that, so we just make even the "mismatch" path do an "mf".
+         */
+.Lcmpxchg64_mismatch:
+        {
+         move   sp, r27
+         mtspr  EX_CONTEXT_1_0, r28
+        }
+        mf
+        {
+         move   r0, r21
+         sw     ATOMIC_LOCK_REG_NAME, zero
+        }
+        iret
+
+.Lcmpxchg64_tns:
+        cmpxchg_lock 64
+
+
+        /*
+         * Reset sp and revector to sys_cmpxchg_badaddr(), which will
+         * just raise the appropriate signal and exit.  Doing it this
+         * way means we don't have to duplicate the code in intvec.S's
+         * int_hand macro that locates the top of the stack.
+         */
+.Lcmpxchg_badaddr:
+        {
+         moveli TREG_SYSCALL_NR_NAME, __NR_cmpxchg_badaddr
+         move   sp, r27
+        }
+        j       intvec_SWINT_1
+        ENDPROC(sys_cmpxchg)
+        ENTRY(__sys_cmpxchg_end)
+
+
+/* The single-step support may need to read all the registers. */
+int_unalign:
+        push_extra_callee_saves r0
+        j       do_trap
+
+/* Include .intrpt1 array of interrupt vectors */
+        .section ".intrpt1", "ax"
+
+#define op_handle_perf_interrupt bad_intr
+#define op_handle_aux_perf_interrupt bad_intr
+
+#ifndef CONFIG_HARDWALL
+#define do_hardwall_trap bad_intr
+#endif
+
+        int_hand     INT_ITLB_MISS, ITLB_MISS, \
+                     do_page_fault, handle_interrupt_no_single_step
+        int_hand     INT_MEM_ERROR, MEM_ERROR, bad_intr
+        int_hand     INT_ILL, ILL, do_trap, handle_ill
+        int_hand     INT_GPV, GPV, do_trap
+        int_hand     INT_SN_ACCESS, SN_ACCESS, do_trap
+        int_hand     INT_IDN_ACCESS, IDN_ACCESS, do_trap
+        int_hand     INT_UDN_ACCESS, UDN_ACCESS, do_trap
+        int_hand     INT_IDN_REFILL, IDN_REFILL, bad_intr
+        int_hand     INT_UDN_REFILL, UDN_REFILL, bad_intr
+        int_hand     INT_IDN_COMPLETE, IDN_COMPLETE, bad_intr
+        int_hand     INT_UDN_COMPLETE, UDN_COMPLETE, bad_intr
+        int_hand     INT_SWINT_3, SWINT_3, do_trap
+        int_hand     INT_SWINT_2, SWINT_2, do_trap
+        int_hand     INT_SWINT_1, SWINT_1, SYSCALL, handle_syscall
+        int_hand     INT_SWINT_0, SWINT_0, do_trap
+        int_hand     INT_UNALIGN_DATA, UNALIGN_DATA, int_unalign
+        int_hand     INT_DTLB_MISS, DTLB_MISS, do_page_fault
+        int_hand     INT_DTLB_ACCESS, DTLB_ACCESS, do_page_fault
+        int_hand     INT_DMATLB_MISS, DMATLB_MISS, do_page_fault
+        int_hand     INT_DMATLB_ACCESS, DMATLB_ACCESS, do_page_fault
+        int_hand     INT_SNITLB_MISS, SNITLB_MISS, do_page_fault
+        int_hand     INT_SN_NOTIFY, SN_NOTIFY, bad_intr
+        int_hand     INT_SN_FIREWALL, SN_FIREWALL, do_hardwall_trap
+        int_hand     INT_IDN_FIREWALL, IDN_FIREWALL, bad_intr
+        int_hand     INT_UDN_FIREWALL, UDN_FIREWALL, do_hardwall_trap
+        int_hand     INT_TILE_TIMER, TILE_TIMER, do_timer_interrupt
+        int_hand     INT_IDN_TIMER, IDN_TIMER, bad_intr
+        int_hand     INT_UDN_TIMER, UDN_TIMER, bad_intr
+        int_hand     INT_DMA_NOTIFY, DMA_NOTIFY, bad_intr
+        int_hand     INT_IDN_CA, IDN_CA, bad_intr
+        int_hand     INT_UDN_CA, UDN_CA, bad_intr
+        int_hand     INT_IDN_AVAIL, IDN_AVAIL, bad_intr
+        int_hand     INT_UDN_AVAIL, UDN_AVAIL, bad_intr
+        int_hand     INT_PERF_COUNT, PERF_COUNT, \
+                     op_handle_perf_interrupt, handle_nmi
+        int_hand     INT_INTCTRL_3, INTCTRL_3, bad_intr
+        int_hand     INT_INTCTRL_2, INTCTRL_2, bad_intr
+        dc_dispatch  INT_INTCTRL_1, INTCTRL_1
+        int_hand     INT_INTCTRL_0, INTCTRL_0, bad_intr
+        int_hand     INT_MESSAGE_RCV_DWNCL, MESSAGE_RCV_DWNCL, \
+                     hv_message_intr, handle_interrupt_downcall
+        int_hand     INT_DEV_INTR_DWNCL, DEV_INTR_DWNCL, \
+                     tile_dev_intr, handle_interrupt_downcall
+        int_hand     INT_I_ASID, I_ASID, bad_intr
+        int_hand     INT_D_ASID, D_ASID, bad_intr
+        int_hand     INT_DMATLB_MISS_DWNCL, DMATLB_MISS_DWNCL, \
+                     do_page_fault, handle_interrupt_downcall
+        int_hand     INT_SNITLB_MISS_DWNCL, SNITLB_MISS_DWNCL, \
+                     do_page_fault, handle_interrupt_downcall
+        int_hand     INT_DMATLB_ACCESS_DWNCL, DMATLB_ACCESS_DWNCL, \
+                     do_page_fault, handle_interrupt_downcall
+        int_hand     INT_SN_CPL, SN_CPL, bad_intr
+        int_hand     INT_DOUBLE_FAULT, DOUBLE_FAULT, do_trap
+#if CHIP_HAS_AUX_PERF_COUNTERS()
+        int_hand     INT_AUX_PERF_COUNT, AUX_PERF_COUNT, \
+                     op_handle_aux_perf_interrupt, handle_nmi
+#endif
+
+        /* Synthetic interrupt delivered only by the simulator */
+        int_hand     INT_BREAKPOINT, BREAKPOINT, do_breakpoint
diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
new file mode 100644
index 000000000000..596c60086930
--- /dev/null
+++ b/arch/tile/kernel/irq.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel_stat.h>
+#include <linux/uaccess.h>
+#include <hv/drv_pcie_rc_intf.h>
+#include <arch/spr_def.h>
+#include <asm/traps.h>
+
+/* Bit-flag stored in irq_desc->chip_data to indicate HW-cleared irqs. */
+#define IS_HW_CLEARED 1
+
+/*
+ * The set of interrupts we enable for raw_local_irq_enable().
+ * This is initialized to have just a single interrupt that the kernel
+ * doesn't actually use as a sentinel.  During kernel init,
+ * interrupts are added as the kernel gets prepared to support them.
+ * NOTE: we could probably initialize them all statically up front.
+ */
+DEFINE_PER_CPU(unsigned long long, interrupts_enabled_mask) =
+  INITIAL_INTERRUPTS_ENABLED;
+EXPORT_PER_CPU_SYMBOL(interrupts_enabled_mask);
+
+/* Define per-tile device interrupt statistics state. */
+DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
+EXPORT_PER_CPU_SYMBOL(irq_stat);
+
+/*
+ * Define per-tile irq disable mask; the hardware/HV only has a single
+ * mask that we use to implement both masking and disabling.
+ */
+static DEFINE_PER_CPU(unsigned long, irq_disable_mask)
+        ____cacheline_internodealigned_in_smp;
+
+/*
+ * Per-tile IRQ nesting depth.  Used to make sure we enable newly
+ * enabled IRQs before exiting the outermost interrupt.
+ */
+static DEFINE_PER_CPU(int, irq_depth);
+
+/* State for allocating IRQs on Gx. */
+#if CHIP_HAS_IPI()
+static unsigned long available_irqs = ~(1UL << IRQ_RESCHEDULE);
+static DEFINE_SPINLOCK(available_irqs_lock);
+#endif
+
+#if CHIP_HAS_IPI()
+/* Use SPRs to manipulate device interrupts. */
+#define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_1, irq_mask)
+#define unmask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_RESET_1, irq_mask)
+#define clear_irqs(irq_mask) __insn_mtspr(SPR_IPI_EVENT_RESET_1, irq_mask)
+#else
+/* Use HV to manipulate device interrupts. */
+#define mask_irqs(irq_mask) hv_disable_intr(irq_mask)
+#define unmask_irqs(irq_mask) hv_enable_intr(irq_mask)
+#define clear_irqs(irq_mask) hv_clear_intr(irq_mask)
+#endif
+
+/*
+ * The interrupt handling path, implemented in terms of HV interrupt
+ * emulation on TILE64 and TILEPro, and IPI hardware on TILE-Gx.
+ */
+void tile_dev_intr(struct pt_regs *regs, int intnum)
+{
+        int depth = __get_cpu_var(irq_depth)++;
+        unsigned long original_irqs;
+        unsigned long remaining_irqs;
+        struct pt_regs *old_regs;
+
+#if CHIP_HAS_IPI()
+        /*
+         * Pending interrupts are listed in an SPR.  We might be
+         * nested, so be sure to only handle irqs that weren't already
+         * masked by a previous interrupt.  Then, mask out the ones
+         * we're going to handle.
+         */
+        unsigned long masked = __insn_mfspr(SPR_IPI_MASK_1);
+        original_irqs = __insn_mfspr(SPR_IPI_EVENT_1) & ~masked;
+        __insn_mtspr(SPR_IPI_MASK_SET_1, original_irqs);
+#else
+        /*
+         * Hypervisor performs the equivalent of the Gx code above and
+         * then puts the pending interrupt mask into a system save reg
+         * for us to find.
+         */
+        original_irqs = __insn_mfspr(SPR_SYSTEM_SAVE_1_3);
+#endif
+        remaining_irqs = original_irqs;
+
+        /* Track time spent here in an interrupt context. */
+        old_regs = set_irq_regs(regs);
+        irq_enter();
+
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
+        /* Debugging check for stack overflow: less than 1/8th stack free? */
+        {
+                long sp = stack_pointer - (long) current_thread_info();
+                if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
+                        pr_emerg("tile_dev_intr: "
+                               "stack overflow: %ld\n",
+                               sp - sizeof(struct thread_info));
+                        dump_stack();
+                }
+        }
+#endif
+        while (remaining_irqs) {
+                unsigned long irq = __ffs(remaining_irqs);
+                remaining_irqs &= ~(1UL << irq);
+
+                /* Count device irqs; Linux IPIs are counted elsewhere. */
+                if (irq != IRQ_RESCHEDULE)
+                        __get_cpu_var(irq_stat).irq_dev_intr_count++;
+
+                generic_handle_irq(irq);
+        }
+
+        /*
+         * If we weren't nested, turn on all enabled interrupts,
+         * including any that were reenabled during interrupt
+         * handling.
+         */
+        if (depth == 0)
+                unmask_irqs(~__get_cpu_var(irq_disable_mask));
+
+        __get_cpu_var(irq_depth)--;
+
+        /*
+         * Track time spent against the current process again and
+         * process any softirqs if they are waiting.
+         */
+        irq_exit();
+        set_irq_regs(old_regs);
+}
+
+
+/*
+ * Remove an irq from the disabled mask.  If we're in an interrupt
+ * context, defer enabling the HW interrupt until we leave.
+ */
+void enable_percpu_irq(unsigned int irq)
+{
+        get_cpu_var(irq_disable_mask) &= ~(1UL << irq);
+        if (__get_cpu_var(irq_depth) == 0)
+                unmask_irqs(1UL << irq);
+        put_cpu_var(irq_disable_mask);
+}
+EXPORT_SYMBOL(enable_percpu_irq);
+
+/*
+ * Add an irq to the disabled mask.  We disable the HW interrupt
+ * immediately so that there's no possibility of it firing.  If we're
+ * in an interrupt context, the return path is careful to avoid
+ * unmasking a newly disabled interrupt.
+ */
+void disable_percpu_irq(unsigned int irq)
+{
+        get_cpu_var(irq_disable_mask) |= (1UL << irq);
+        mask_irqs(1UL << irq);
+        put_cpu_var(irq_disable_mask);
+}
+EXPORT_SYMBOL(disable_percpu_irq);
+
+/* Mask an interrupt. */
+static void tile_irq_chip_mask(unsigned int irq)
+{
+        mask_irqs(1UL << irq);
+}
+
+/* Unmask an interrupt. */
+static void tile_irq_chip_unmask(unsigned int irq)
+{
+        unmask_irqs(1UL << irq);
+}
+
+/*
+ * Clear an interrupt before processing it so that any new assertions
+ * will trigger another irq.
+ */
+static void tile_irq_chip_ack(unsigned int irq)
+{
+        if ((unsigned long)get_irq_chip_data(irq) != IS_HW_CLEARED)
+                clear_irqs(1UL << irq);
+}
+
+/*
+ * For per-cpu interrupts, we need to avoid unmasking any interrupts
+ * that we disabled via disable_percpu_irq().
+ */
+static void tile_irq_chip_eoi(unsigned int irq)
+{
+        if (!(__get_cpu_var(irq_disable_mask) & (1UL << irq)))
+                unmask_irqs(1UL << irq);
+}
+
+static struct irq_chip tile_irq_chip = {
+        .typename = "tile_irq_chip",
+        .ack = tile_irq_chip_ack,
+        .eoi = tile_irq_chip_eoi,
+        .mask = tile_irq_chip_mask,
+        .unmask = tile_irq_chip_unmask,
+};
+
+void __init init_IRQ(void)
+{
+        ipi_init();
+}
+
+void __cpuinit setup_irq_regs(void)
+{
+        /* Enable interrupt delivery. */
+        unmask_irqs(~0UL);
+#if CHIP_HAS_IPI()
+        raw_local_irq_unmask(INT_IPI_1);
+#endif
+}
+
+void tile_irq_activate(unsigned int irq, int tile_irq_type)
+{
+        /*
+         * We use handle_level_irq() by default because the pending
+         * interrupt vector (whether modeled by the HV on TILE64 and
+         * TILEPro or implemented in hardware on TILE-Gx) has
+         * level-style semantics for each bit.  An interrupt fires
+         * whenever a bit is high, not just at edges.
+         */
+        irq_flow_handler_t handle = handle_level_irq;
+        if (tile_irq_type == TILE_IRQ_PERCPU)
+                handle = handle_percpu_irq;
+        set_irq_chip_and_handler(irq, &tile_irq_chip, handle);
+
+        /*
+         * Flag interrupts that are hardware-cleared so that ack()
+         * won't clear them.
+         */
+        if (tile_irq_type == TILE_IRQ_HW_CLEAR)
+                set_irq_chip_data(irq, (void *)IS_HW_CLEARED);
+}
+EXPORT_SYMBOL(tile_irq_activate);
+
+
+void ack_bad_irq(unsigned int irq)
+{
+        pr_err("unexpected IRQ trap at vector %02x\n", irq);
+}
+
+/*
+ * Generic, controller-independent functions:
+ */
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+        int i = *(loff_t *) v, j;
+        struct irqaction *action;
+        unsigned long flags;
+
+        if (i == 0) {
+                seq_printf(p, "           ");
+                for (j = 0; j < NR_CPUS; j++)
+                        if (cpu_online(j))
+                                seq_printf(p, "CPU%-8d", j);
+                seq_putc(p, '\n');
+        }
+
+        if (i < NR_IRQS) {
+                raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
+                action = irq_desc[i].action;
+                if (!action)
+                        goto skip;
+                seq_printf(p, "%3d: ", i);
+#ifndef CONFIG_SMP
+                seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+                for_each_online_cpu(j)
+                        seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+#endif
+                seq_printf(p, " %14s", irq_desc[i].chip->typename);
+                seq_printf(p, "  %s", action->name);
+
+                for (action = action->next; action; action = action->next)
+                        seq_printf(p, ", %s", action->name);
+
+                seq_putc(p, '\n');
+skip:
+                raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+        }
+        return 0;
+}
+
+#if CHIP_HAS_IPI()
+int create_irq(void)
+{
+        unsigned long flags;
+        int result;
+
+        spin_lock_irqsave(&available_irqs_lock, flags);
+        if (available_irqs == 0)
+                result = -ENOMEM;
+        else {
+                result = __ffs(available_irqs);
+                available_irqs &= ~(1UL << result);
+                dynamic_irq_init(result);
+        }
+        spin_unlock_irqrestore(&available_irqs_lock, flags);
+
+        return result;
+}
+EXPORT_SYMBOL(create_irq);
+
+void destroy_irq(unsigned int irq)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&available_irqs_lock, flags);
+        available_irqs |= (1UL << irq);
+        dynamic_irq_cleanup(irq);
+        spin_unlock_irqrestore(&available_irqs_lock, flags);
+}
+EXPORT_SYMBOL(destroy_irq);
+#endif
diff --git a/arch/tile/kernel/machine_kexec.c b/arch/tile/kernel/machine_kexec.c
new file mode 100644
index 000000000000..ba7a265d6179
--- /dev/null
+++ b/arch/tile/kernel/machine_kexec.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * based on machine_kexec.c from other architectures in linux-2.6.18
+ */
+
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/errno.h>
+#include <linux/vmalloc.h>
+#include <linux/cpumask.h>
+#include <linux/kernel.h>
+#include <linux/elf.h>
+#include <linux/highmem.h>
+#include <linux/mmu_context.h>
+#include <linux/io.h>
+#include <linux/timex.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/checksum.h>
+#include <hv/hypervisor.h>
+
+
+/*
+ * This stuff is not in elf.h and is not in any other kernel include.
+ * This stuff is needed below in the little boot notes parser to
+ * extract the command line so we can pass it to the hypervisor.
+ */
+struct Elf32_Bhdr {
+        Elf32_Word b_signature;
+        Elf32_Word b_size;
+        Elf32_Half b_checksum;
+        Elf32_Half b_records;
+};
+#define ELF_BOOT_MAGIC          0x0E1FB007
+#define EBN_COMMAND_LINE        0x00000004
+#define roundupsz(X) (((X) + 3) & ~3)
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+
+void machine_shutdown(void)
+{
+        /*
+         * Normally we would stop all the other processors here, but
+         * the check in machine_kexec_prepare below ensures we'll only
+         * get this far if we've been booted with "nosmp" on the
+         * command line or without CONFIG_SMP so there's nothing to do
+         * here (for now).
+         */
+}
+
+void machine_crash_shutdown(struct pt_regs *regs)
+{
+        /*
+         * Cannot happen.  This type of kexec is disabled on this
+         * architecture (and enforced in machine_kexec_prepare below).
+         */
+}
+
+
+int machine_kexec_prepare(struct kimage *image)
+{
+        if (num_online_cpus() > 1) {
+                pr_warning("%s: detected attempt to kexec "
+                       "with num_online_cpus() > 1\n",
+                       __func__);
+                return -ENOSYS;
+        }
+        if (image->type != KEXEC_TYPE_DEFAULT) {
+                pr_warning("%s: detected attempt to kexec "
+                       "with unsupported type: %d\n",
+                       __func__,
+                       image->type);
+                return -ENOSYS;
+        }
+        return 0;
+}
+
+void machine_kexec_cleanup(struct kimage *image)
+{
+        /*
+         * We did nothing in machine_kexec_prepare,
+         * so we have nothing to do here.
+         */
+}
+
+/*
+ * If we can find elf boot notes on this page, return the command
+ * line.  Otherwise, silently return null.  Somewhat kludgy, but no
+ * good way to do this without significantly rearchitecting the
+ * architecture-independent kexec code.
+ */
+
+static unsigned char *kexec_bn2cl(void *pg)
+{
+        struct Elf32_Bhdr *bhdrp;
+        Elf32_Nhdr *nhdrp;
+        unsigned char *desc;
+        unsigned char *command_line;
+        __sum16 csum;
+
+        bhdrp = (struct Elf32_Bhdr *) pg;
+
+        /*
+         * This routine is invoked for every source page, so make
+         * sure to quietly ignore every impossible page.
+         */
+        if (bhdrp->b_signature != ELF_BOOT_MAGIC ||
+            bhdrp->b_size > PAGE_SIZE)
+                return 0;
+
+        /*
+         * If we get a checksum mismatch, warn with the checksum
+         * so we can diagnose better.
+         */
+        csum = ip_compute_csum(pg, bhdrp->b_size);
+        if (csum != 0) {
+                pr_warning("%s: bad checksum %#x (size %d)\n",
+                           __func__, csum, bhdrp->b_size);
+                return 0;
+        }
+
+        nhdrp = (Elf32_Nhdr *) (bhdrp + 1);
+
+        while (nhdrp->n_type != EBN_COMMAND_LINE) {
+
+                desc = (unsigned char *) (nhdrp + 1);
+                desc += roundupsz(nhdrp->n_descsz);
+
+                nhdrp = (Elf32_Nhdr *) desc;
+
+                /* still in bounds? */
+                if ((unsigned char *) (nhdrp + 1) >
+                    ((unsigned char *) pg) + bhdrp->b_size) {
+
+                        pr_info("%s: out of bounds\n", __func__);
+                        return 0;
+                }
+        }
+
+        command_line = (unsigned char *) (nhdrp + 1);
+        desc = command_line;
+
+        while (*desc != '\0') {
+                desc++;
+                if (((unsigned long)desc & PAGE_MASK) != (unsigned long)pg) {
+                        pr_info("%s: ran off end of page\n",
+                               __func__);
+                        return 0;
+                }
+        }
+
+        return command_line;
+}
+
+static void kexec_find_and_set_command_line(struct kimage *image)
+{
+        kimage_entry_t *ptr, entry;
+
+        unsigned char *command_line = 0;
+        unsigned char *r;
+        HV_Errno hverr;
+
+        for (ptr = &image->head;
+             (entry = *ptr) && !(entry & IND_DONE);
+             ptr = (entry & IND_INDIRECTION) ?
+                     phys_to_virt((entry & PAGE_MASK)) : ptr + 1) {
+
+                if ((entry & IND_SOURCE)) {
+                        void *va =
+                                kmap_atomic_pfn(entry >> PAGE_SHIFT, KM_USER0);
+                        r = kexec_bn2cl(va);
+                        if (r) {
+                                command_line = r;
+                                break;
+                        }
+                        kunmap_atomic(va, KM_USER0);
+                }
+        }
+
+        if (command_line != 0) {
+                pr_info("setting new command line to \"%s\"\n",
+                       command_line);
+
+                hverr = hv_set_command_line(
+                        (HV_VirtAddr) command_line, strlen(command_line));
+                kunmap_atomic(command_line, KM_USER0);
+        } else {
+                pr_info("%s: no command line found; making empty\n",
+                       __func__);
+                hverr = hv_set_command_line((HV_VirtAddr) command_line, 0);
+        }
+        if (hverr)
+                pr_warning("%s: hv_set_command_line returned error: %d\n",
+                           __func__, hverr);
+}
+
+/*
+ * The kexec code range-checks all its PAs, so to avoid having it run
+ * amok and allocate memory and then sequester it from every other
+ * controller, we force it to come from controller zero.  We also
+ * disable the oom-killer since if we do end up running out of memory,
+ * that almost certainly won't help.
+ */
+struct page *kimage_alloc_pages_arch(gfp_t gfp_mask, unsigned int order)
+{
+        gfp_mask |= __GFP_THISNODE | __GFP_NORETRY;
+        return alloc_pages_node(0, gfp_mask, order);
+}
+
+static void setup_quasi_va_is_pa(void)
+{
+        HV_PTE *pgtable;
+        HV_PTE pte;
+        int i;
+
+        /*
+         * Flush our TLB to prevent conflicts between the previous contents
+         * and the new stuff we're about to add.
+         */
+        local_flush_tlb_all();
+
+        /* setup VA is PA, at least up to PAGE_OFFSET */
+
+        pgtable = (HV_PTE *)current->mm->pgd;
+        pte = hv_pte(_PAGE_KERNEL | _PAGE_HUGE_PAGE);
+        pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_NO_L3);
+
+        for (i = 0; i < pgd_index(PAGE_OFFSET); i++)
+                pgtable[i] = pfn_pte(i << (HPAGE_SHIFT - PAGE_SHIFT), pte);
+}
+
+
+NORET_TYPE void machine_kexec(struct kimage *image)
+{
+        void *reboot_code_buffer;
+        NORET_TYPE void (*rnk)(unsigned long, void *, unsigned long)
+                ATTRIB_NORET;
+
+        /* Mask all interrupts before starting to reboot. */
+        interrupt_mask_set_mask(~0ULL);
+
+        kexec_find_and_set_command_line(image);
+
+        /*
+         * Adjust the home caching of the control page to be cached on
+         * this cpu, and copy the assembly helper into the control
+         * code page, which we map in the vmalloc area.
+         */
+        homecache_change_page_home(image->control_code_page, 0,
+                                   smp_processor_id());
+        reboot_code_buffer = vmap(&image->control_code_page, 1, 0,
+                                  __pgprot(_PAGE_KERNEL | _PAGE_EXECUTABLE));
+        memcpy(reboot_code_buffer, relocate_new_kernel,
+               relocate_new_kernel_size);
+        __flush_icache_range(
+                (unsigned long) reboot_code_buffer,
+                (unsigned long) reboot_code_buffer + relocate_new_kernel_size);
+
+        setup_quasi_va_is_pa();
+
+        /* now call it */
+        rnk = reboot_code_buffer;
+        (*rnk)(image->head, reboot_code_buffer, image->start);
+}
diff --git a/arch/tile/kernel/messaging.c b/arch/tile/kernel/messaging.c
new file mode 100644
index 000000000000..6d23ed271d10
--- /dev/null
+++ b/arch/tile/kernel/messaging.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/percpu.h>
+#include <linux/smp.h>
+#include <linux/hardirq.h>
+#include <linux/ptrace.h>
+#include <asm/hv_driver.h>
+#include <asm/irq_regs.h>
+#include <asm/traps.h>
+#include <hv/hypervisor.h>
+#include <arch/interrupts.h>
+
+/* All messages are stored here */
+static DEFINE_PER_CPU(HV_MsgState, msg_state);
+
+void __cpuinit init_messaging(void)
+{
+        /* Allocate storage for messages in kernel space */
+        HV_MsgState *state = &__get_cpu_var(msg_state);
+        int rc = hv_register_message_state(state);
+        if (rc != HV_OK)
+                panic("hv_register_message_state: error %d", rc);
+
+        /* Make sure downcall interrupts will be enabled. */
+        raw_local_irq_unmask(INT_INTCTRL_1);
+}
+
+void hv_message_intr(struct pt_regs *regs, int intnum)
+{
+        /*
+         * We enter with interrupts disabled and leave them disabled,
+         * to match expectations of called functions (e.g.
+         * do_ccupdate_local() in mm/slab.c).  This is also consistent
+         * with normal call entry for device interrupts.
+         */
+
+        int message[HV_MAX_MESSAGE_SIZE/sizeof(int)];
+        HV_RcvMsgInfo rmi;
+        int nmsgs = 0;
+
+        /* Track time spent here in an interrupt context */
+        struct pt_regs *old_regs = set_irq_regs(regs);
+        irq_enter();
+
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
+        /* Debugging check for stack overflow: less than 1/8th stack free? */
+        {
+                long sp = stack_pointer - (long) current_thread_info();
+                if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
+                        pr_emerg("hv_message_intr: "
+                               "stack overflow: %ld\n",
+                               sp - sizeof(struct thread_info));
+                        dump_stack();
+                }
+        }
+#endif
+
+        while (1) {
+                rmi = hv_receive_message(__get_cpu_var(msg_state),
+                                         (HV_VirtAddr) message,
+                                         sizeof(message));
+                if (rmi.msglen == 0)
+                        break;
+
+                if (rmi.msglen < 0)
+                        panic("hv_receive_message failed: %d", rmi.msglen);
+
+                ++nmsgs;
+
+                if (rmi.source == HV_MSG_TILE) {
+                        int tag;
+
+                        /* we just send tags for now */
+                        BUG_ON(rmi.msglen != sizeof(int));
+
+                        tag = message[0];
+#ifdef CONFIG_SMP
+                        evaluate_message(message[0]);
+#else
+                        panic("Received IPI message %d in UP mode", tag);
+#endif
+                } else if (rmi.source == HV_MSG_INTR) {
+                        HV_IntrMsg *him = (HV_IntrMsg *)message;
+                        struct hv_driver_cb *cb =
+                                (struct hv_driver_cb *)him->intarg;
+                        cb->callback(cb, him->intdata);
+                        __get_cpu_var(irq_stat).irq_hv_msg_count++;
+                }
+        }
+
+        /*
+         * We shouldn't have gotten a message downcall with no
+         * messages available.
+         */
+        if (nmsgs == 0)
+                panic("Message downcall invoked with no messages!");
+
+        /*
+         * Track time spent against the current process again and
+         * process any softirqs if they are waiting.
+         */
+        irq_exit();
+        set_irq_regs(old_regs);
+}
diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c
new file mode 100644
index 000000000000..e2ab82b7c7e7
--- /dev/null
+++ b/arch/tile/kernel/module.c
@@ -0,0 +1,257 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Based on i386 version, copyright (C) 2001 Rusty Russell.
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <asm/opcode-tile.h>
+#include <asm/pgtable.h>
+
+#ifdef __tilegx__
+# define Elf_Rela Elf64_Rela
+# define ELF_R_SYM ELF64_R_SYM
+# define ELF_R_TYPE ELF64_R_TYPE
+#else
+# define Elf_Rela Elf32_Rela
+# define ELF_R_SYM ELF32_R_SYM
+# define ELF_R_TYPE ELF32_R_TYPE
+#endif
+
+#ifdef MODULE_DEBUG
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt...)
+#endif
+
+/*
+ * Allocate some address space in the range MEM_MODULE_START to
+ * MEM_MODULE_END and populate it with memory.
+ */
+void *module_alloc(unsigned long size)
+{
+        struct page **pages;
+        pgprot_t prot_rwx = __pgprot(_PAGE_KERNEL | _PAGE_KERNEL_EXEC);
+        struct vm_struct *area;
+        int i = 0;
+        int npages;
+
+        if (size == 0)
+                return NULL;
+        npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
+        pages = kmalloc(npages * sizeof(struct page *), GFP_KERNEL);
+        if (pages == NULL)
+                return NULL;
+        for (; i < npages; ++i) {
+                pages[i] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
+                if (!pages[i])
+                        goto error;
+        }
+
+        area = __get_vm_area(size, VM_ALLOC, MEM_MODULE_START, MEM_MODULE_END);
+        if (!area)
+                goto error;
+
+        if (map_vm_area(area, prot_rwx, &pages)) {
+                vunmap(area->addr);
+                goto error;
+        }
+
+        return area->addr;
+
+error:
+        while (--i >= 0)
+                __free_page(pages[i]);
+        kfree(pages);
+        return NULL;
+}
+
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+        vfree(module_region);
+        /*
+         * FIXME: If module_region == mod->init_region, trim exception
+         * table entries.
+         */
+}
+
+/* We don't need anything special. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+                              Elf_Shdr *sechdrs,
+                              char *secstrings,
+                              struct module *mod)
+{
+        return 0;
+}
+
+int apply_relocate(Elf_Shdr *sechdrs,
+                   const char *strtab,
+                   unsigned int symindex,
+                   unsigned int relsec,
+                   struct module *me)
+{
+        pr_err("module %s: .rel relocation unsupported\n", me->name);
+        return -ENOEXEC;
+}
+
+#ifdef __tilegx__
+/*
+ * Validate that the high 16 bits of "value" is just the sign-extension of
+ * the low 48 bits.
+ */
+static int validate_hw2_last(long value, struct module *me)
+{
+        if (((value << 16) >> 16) != value) {
+                pr_warning("module %s: Out of range HW2_LAST value %#lx\n",
+                           me->name, value);
+                return 0;
+        }
+        return 1;
+}
+
+/*
+ * Validate that "value" isn't too big to hold in a JumpOff relocation.
+ */
+static int validate_jumpoff(long value)
+{
+        /* Determine size of jump offset. */
+        int shift = __builtin_clzl(get_JumpOff_X1(create_JumpOff_X1(-1)));
+
+        /* Check to see if it fits into the relocation slot. */
+        long f = get_JumpOff_X1(create_JumpOff_X1(value));
+        f = (f << shift) >> shift;
+
+        return f == value;
+}
+#endif
+
+int apply_relocate_add(Elf_Shdr *sechdrs,
+                       const char *strtab,
+                       unsigned int symindex,
+                       unsigned int relsec,
+                       struct module *me)
+{
+        unsigned int i;
+        Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+        Elf_Sym *sym;
+        u64 *location;
+        unsigned long value;
+
+        DEBUGP("Applying relocate section %u to %u\n", relsec,
+               sechdrs[relsec].sh_info);
+        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+                /* This is where to make the change */
+                location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+                        + rel[i].r_offset;
+                /*
+                 * This is the symbol it is referring to.
+                 * Note that all undefined symbols have been resolved.
+                 */
+                sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+                        + ELF_R_SYM(rel[i].r_info);
+                value = sym->st_value + rel[i].r_addend;
+
+                switch (ELF_R_TYPE(rel[i].r_info)) {
+
+#define MUNGE(func) (*location = ((*location & ~func(-1)) | func(value)))
+
+#ifndef __tilegx__
+                case R_TILE_32:
+                        *(uint32_t *)location = value;
+                        break;
+                case R_TILE_IMM16_X0_HA:
+                        value = (value + 0x8000) >> 16;
+                        /*FALLTHROUGH*/
+                case R_TILE_IMM16_X0_LO:
+                        MUNGE(create_Imm16_X0);
+                        break;
+                case R_TILE_IMM16_X1_HA:
+                        value = (value + 0x8000) >> 16;
+                        /*FALLTHROUGH*/
+                case R_TILE_IMM16_X1_LO:
+                        MUNGE(create_Imm16_X1);
+                        break;
+                case R_TILE_JOFFLONG_X1:
+                        value -= (unsigned long) location;  /* pc-relative */
+                        value = (long) value >> 3;     /* count by instrs */
+                        MUNGE(create_JOffLong_X1);
+                        break;
+#else
+                case R_TILEGX_64:
+                        *location = value;
+                        break;
+                case R_TILEGX_IMM16_X0_HW2_LAST:
+                        if (!validate_hw2_last(value, me))
+                                return -ENOEXEC;
+                        value >>= 16;
+                        /*FALLTHROUGH*/
+                case R_TILEGX_IMM16_X0_HW1:
+                        value >>= 16;
+                        /*FALLTHROUGH*/
+                case R_TILEGX_IMM16_X0_HW0:
+                        MUNGE(create_Imm16_X0);
+                        break;
+                case R_TILEGX_IMM16_X1_HW2_LAST:
+                        if (!validate_hw2_last(value, me))
+                                return -ENOEXEC;
+                        value >>= 16;
+                        /*FALLTHROUGH*/
+                case R_TILEGX_IMM16_X1_HW1:
+                        value >>= 16;
+                        /*FALLTHROUGH*/
+                case R_TILEGX_IMM16_X1_HW0:
+                        MUNGE(create_Imm16_X1);
+                        break;
+                case R_TILEGX_JUMPOFF_X1:
+                        value -= (unsigned long) location;  /* pc-relative */
+                        value = (long) value >> 3;     /* count by instrs */
+                        if (!validate_jumpoff(value)) {
+                                pr_warning("module %s: Out of range jump to"
+                                           " %#llx at %#llx (%p)\n", me->name,
+                                           sym->st_value + rel[i].r_addend,
+                                           rel[i].r_offset, location);
+                                return -ENOEXEC;
+                        }
+                        MUNGE(create_JumpOff_X1);
+                        break;
+#endif
+
+#undef MUNGE
+
+                default:
+                        pr_err("module %s: Unknown relocation: %d\n",
+                               me->name, (int) ELF_R_TYPE(rel[i].r_info));
+                        return -ENOEXEC;
+                }
+        }
+        return 0;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+                    const Elf_Shdr *sechdrs,
+                    struct module *me)
+{
+        /* FIXME: perhaps remove the "writable" bit from the TLB? */
+        return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}
diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c
new file mode 100644
index 000000000000..5ad5e13b0fa6
--- /dev/null
+++ b/arch/tile/kernel/pci-dma.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+#include <asm/tlbflush.h>
+#include <asm/homecache.h>
+
+/* Generic DMA mapping functions: */
+
+/*
+ * Allocate what Linux calls "coherent" memory, which for us just
+ * means uncached.
+ */
+void *dma_alloc_coherent(struct device *dev,
+                         size_t size,
+                         dma_addr_t *dma_handle,
+                         gfp_t gfp)
+{
+        u64 dma_mask = dev->coherent_dma_mask ?: DMA_BIT_MASK(32);
+        int node = dev_to_node(dev);
+        int order = get_order(size);
+        struct page *pg;
+        dma_addr_t addr;
+
+        gfp |= __GFP_ZERO;
+
+        /*
+         * By forcing NUMA node 0 for 32-bit masks we ensure that the
+         * high 32 bits of the resulting PA will be zero.  If the mask
+         * size is, e.g., 24, we may still not be able to guarantee a
+         * suitable memory address, in which case we will return NULL.
+         * But such devices are uncommon.
+         */
+        if (dma_mask <= DMA_BIT_MASK(32))
+                node = 0;
+
+        pg = homecache_alloc_pages_node(node, gfp, order, PAGE_HOME_UNCACHED);
+        if (pg == NULL)
+                return NULL;
+
+        addr = page_to_phys(pg);
+        if (addr + size > dma_mask) {
+                homecache_free_pages(addr, order);
+                return NULL;
+        }
+
+        *dma_handle = addr;
+        return page_address(pg);
+}
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+/*
+ * Free memory that was allocated with dma_alloc_coherent.
+ */
+void dma_free_coherent(struct device *dev, size_t size,
+                  void *vaddr, dma_addr_t dma_handle)
+{
+        homecache_free_pages((unsigned long)vaddr, get_order(size));
+}
+EXPORT_SYMBOL(dma_free_coherent);
+
+/*
+ * The map routines "map" the specified address range for DMA
+ * accesses.  The memory belongs to the device after this call is
+ * issued, until it is unmapped with dma_unmap_single.
+ *
+ * We don't need to do any mapping, we just flush the address range
+ * out of the cache and return a DMA address.
+ *
+ * The unmap routines do whatever is necessary before the processor
+ * accesses the memory again, and must be called before the driver
+ * touches the memory.  We can get away with a cache invalidate if we
+ * can count on nothing having been touched.
+ */
+
+
+/*
+ * dma_map_single can be passed any memory address, and there appear
+ * to be no alignment constraints.
+ *
+ * There is a chance that the start of the buffer will share a cache
+ * line with some other data that has been touched in the meantime.
+ */
+dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+               enum dma_data_direction direction)
+{
+        struct page *page;
+        dma_addr_t dma_addr;
+        int thispage;
+
+        BUG_ON(!valid_dma_direction(direction));
+        WARN_ON(size == 0);
+
+        dma_addr = __pa(ptr);
+
+        /* We might have been handed a buffer that wraps a page boundary */
+        while ((int)size > 0) {
+                /* The amount to flush that's on this page */
+                thispage = PAGE_SIZE - ((unsigned long)ptr & (PAGE_SIZE - 1));
+                thispage = min((int)thispage, (int)size);
+                /* Is this valid for any page we could be handed? */
+                page = pfn_to_page(kaddr_to_pfn(ptr));
+                homecache_flush_cache(page, 0);
+                ptr += thispage;
+                size -= thispage;
+        }
+
+        return dma_addr;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+                 enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+}
+EXPORT_SYMBOL(dma_unmap_single);
+
+int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
+           enum dma_data_direction direction)
+{
+        struct scatterlist *sg;
+        int i;
+
+        BUG_ON(!valid_dma_direction(direction));
+
+        WARN_ON(nents == 0 || sglist->length == 0);
+
+        for_each_sg(sglist, sg, nents, i) {
+                struct page *page;
+                sg->dma_address = sg_phys(sg);
+                page = pfn_to_page(sg->dma_address >> PAGE_SHIFT);
+                homecache_flush_cache(page, 0);
+        }
+
+        return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);
+
+void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+             enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+}
+EXPORT_SYMBOL(dma_unmap_sg);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+                        unsigned long offset, size_t size,
+                        enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+
+        homecache_flush_cache(page, 0);
+
+        return page_to_pa(page) + offset;
+}
+EXPORT_SYMBOL(dma_map_page);
+
+void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+               enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+}
+EXPORT_SYMBOL(dma_unmap_page);
+
+void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                             size_t size, enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+}
+EXPORT_SYMBOL(dma_sync_single_for_cpu);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+                                size_t size, enum dma_data_direction direction)
+{
+        unsigned long start = PFN_DOWN(dma_handle);
+        unsigned long end = PFN_DOWN(dma_handle + size - 1);
+        unsigned long i;
+
+        BUG_ON(!valid_dma_direction(direction));
+        for (i = start; i <= end; ++i)
+                homecache_flush_cache(pfn_to_page(i), 0);
+}
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+                    enum dma_data_direction direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+        WARN_ON(nelems == 0 || sg[0].length == 0);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+
+/*
+ * Flush and invalidate cache for scatterlist.
+ */
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
+                            int nelems, enum dma_data_direction direction)
+{
+        struct scatterlist *sg;
+        int i;
+
+        BUG_ON(!valid_dma_direction(direction));
+        WARN_ON(nelems == 0 || sglist->length == 0);
+
+        for_each_sg(sglist, sg, nelems, i) {
+                dma_sync_single_for_device(dev, sg->dma_address,
+                                           sg_dma_len(sg), direction);
+        }
+}
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                                   unsigned long offset, size_t size,
+                                   enum dma_data_direction direction)
+{
+        dma_sync_single_for_cpu(dev, dma_handle + offset, size, direction);
+}
+EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+
+void dma_sync_single_range_for_device(struct device *dev,
+                                      dma_addr_t dma_handle,
+                                      unsigned long offset, size_t size,
+                                      enum dma_data_direction direction)
+{
+        dma_sync_single_for_device(dev, dma_handle + offset, size, direction);
+}
+EXPORT_SYMBOL(dma_sync_single_range_for_device);
+
+/*
+ * dma_alloc_noncoherent() returns non-cacheable memory, so there's no
+ * need to do any flushing here.
+ */
+void dma_cache_sync(void *vaddr, size_t size,
+                    enum dma_data_direction direction)
+{
+}
+EXPORT_SYMBOL(dma_cache_sync);
diff --git a/arch/tile/kernel/proc.c b/arch/tile/kernel/proc.c
new file mode 100644
index 000000000000..2e02c41ddf3b
--- /dev/null
+++ b/arch/tile/kernel/proc.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/timex.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/sysctl.h>
+#include <linux/hardirq.h>
+#include <linux/mman.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/homecache.h>
+#include <arch/chip.h>
+
+
+/*
+ * Support /proc/cpuinfo
+ */
+
+#define cpu_to_ptr(n) ((void *)((long)(n)+1))
+#define ptr_to_cpu(p) ((long)(p) - 1)
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+        int n = ptr_to_cpu(v);
+
+        if (n == 0) {
+                char buf[NR_CPUS*5];
+                cpulist_scnprintf(buf, sizeof(buf), cpu_online_mask);
+                seq_printf(m, "cpu count\t: %d\n", num_online_cpus());
+                seq_printf(m, "cpu list\t: %s\n", buf);
+                seq_printf(m, "model name\t: %s\n", chip_model);
+                seq_printf(m, "flags\t\t:\n");  /* nothing for now */
+                seq_printf(m, "cpu MHz\t\t: %llu.%06llu\n",
+                           get_clock_rate() / 1000000,
+                           (get_clock_rate() % 1000000));
+                seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
+                           loops_per_jiffy/(500000/HZ),
+                           (loops_per_jiffy/(5000/HZ)) % 100);
+        }
+
+#ifdef CONFIG_SMP
+        if (!cpu_online(n))
+                return 0;
+#endif
+
+        seq_printf(m, "processor\t: %d\n", n);
+
+        /* Print only num_online_cpus() blank lines total. */
+        if (cpumask_next(n, cpu_online_mask) < nr_cpu_ids)
+                seq_printf(m, "\n");
+
+        return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+        ++*pos;
+        return c_start(m, pos);
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+const struct seq_operations cpuinfo_op = {
+        .start  = c_start,
+        .next   = c_next,
+        .stop   = c_stop,
+        .show   = show_cpuinfo,
+};
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
new file mode 100644
index 000000000000..985cc28c74c5
--- /dev/null
+++ b/arch/tile/kernel/process.c
@@ -0,0 +1,672 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/preempt.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/kprobes.h>
+#include <linux/elfcore.h>
+#include <linux/tick.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/compat.h>
+#include <linux/hardirq.h>
+#include <linux/syscalls.h>
+#include <linux/kernel.h>
+#include <asm/system.h>
+#include <asm/stack.h>
+#include <asm/homecache.h>
+#include <asm/syscalls.h>
+#ifdef CONFIG_HARDWALL
+#include <asm/hardwall.h>
+#endif
+#include <arch/chip.h>
+#include <arch/abi.h>
+
+
+/*
+ * Use the (x86) "idle=poll" option to prefer low latency when leaving the
+ * idle loop over low power while in the idle loop, e.g. if we have
+ * one thread per core and we want to get threads out of futex waits fast.
+ */
+static int no_idle_nap;
+static int __init idle_setup(char *str)
+{
+        if (!str)
+                return -EINVAL;
+
+        if (!strcmp(str, "poll")) {
+                pr_info("using polling idle threads.\n");
+                no_idle_nap = 1;
+        } else if (!strcmp(str, "halt"))
+                no_idle_nap = 0;
+        else
+                return -1;
+
+        return 0;
+}
+early_param("idle", idle_setup);
+
+/*
+ * The idle thread. There's no useful work to be
+ * done, so just try to conserve power and have a
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+void cpu_idle(void)
+{
+        int cpu = smp_processor_id();
+
+
+        current_thread_info()->status |= TS_POLLING;
+
+        if (no_idle_nap) {
+                while (1) {
+                        while (!need_resched())
+                                cpu_relax();
+                        schedule();
+                }
+        }
+
+        /* endless idle loop with no priority at all */
+        while (1) {
+                tick_nohz_stop_sched_tick(1);
+                while (!need_resched()) {
+                        if (cpu_is_offline(cpu))
+                                BUG();  /* no HOTPLUG_CPU */
+
+                        local_irq_disable();
+                        __get_cpu_var(irq_stat).idle_timestamp = jiffies;
+                        current_thread_info()->status &= ~TS_POLLING;
+                        /*
+                         * TS_POLLING-cleared state must be visible before we
+                         * test NEED_RESCHED:
+                         */
+                        smp_mb();
+
+                        if (!need_resched())
+                                _cpu_idle();
+                        else
+                                local_irq_enable();
+                        current_thread_info()->status |= TS_POLLING;
+                }
+                tick_nohz_restart_sched_tick();
+                preempt_enable_no_resched();
+                schedule();
+                preempt_disable();
+        }
+}
+
+struct thread_info *alloc_thread_info(struct task_struct *task)
+{
+        struct page *page;
+        gfp_t flags = GFP_KERNEL;
+
+#ifdef CONFIG_DEBUG_STACK_USAGE
+        flags |= __GFP_ZERO;
+#endif
+
+        page = alloc_pages(flags, THREAD_SIZE_ORDER);
+        if (!page)
+                return NULL;
+
+        return (struct thread_info *)page_address(page);
+}
+
+/*
+ * Free a thread_info node, and all of its derivative
+ * data structures.
+ */
+void free_thread_info(struct thread_info *info)
+{
+        struct single_step_state *step_state = info->step_state;
+
+#ifdef CONFIG_HARDWALL
+        /*
+         * We free a thread_info from the context of the task that has
+         * been scheduled next, so the original task is already dead.
+         * Calling deactivate here just frees up the data structures.
+         * If the task we're freeing held the last reference to a
+         * hardwall fd, it would have been released prior to this point
+         * anyway via exit_files(), and "hardwall" would be NULL by now.
+         */
+        if (info->task->thread.hardwall)
+                hardwall_deactivate(info->task);
+#endif
+
+        if (step_state) {
+
+                /*
+                 * FIXME: we don't munmap step_state->buffer
+                 * because the mm_struct for this process (info->task->mm)
+                 * has already been zeroed in exit_mm().  Keeping a
+                 * reference to it here seems like a bad move, so this
+                 * means we can't munmap() the buffer, and therefore if we
+                 * ptrace multiple threads in a process, we will slowly
+                 * leak user memory.  (Note that as soon as the last
+                 * thread in a process dies, we will reclaim all user
+                 * memory including single-step buffers in the usual way.)
+                 * We should either assign a kernel VA to this buffer
+                 * somehow, or we should associate the buffer(s) with the
+                 * mm itself so we can clean them up that way.
+                 */
+                kfree(step_state);
+        }
+
+        free_page((unsigned long)info);
+}
+
+static void save_arch_state(struct thread_struct *t);
+
+int copy_thread(unsigned long clone_flags, unsigned long sp,
+                unsigned long stack_size,
+                struct task_struct *p, struct pt_regs *regs)
+{
+        struct pt_regs *childregs;
+        unsigned long ksp;
+
+        /*
+         * When creating a new kernel thread we pass sp as zero.
+         * Assign it to a reasonable value now that we have the stack.
+         */
+        if (sp == 0 && regs->ex1 == PL_ICS_EX1(KERNEL_PL, 0))
+                sp = KSTK_TOP(p);
+
+        /*
+         * Do not clone step state from the parent; each thread
+         * must make its own lazily.
+         */
+        task_thread_info(p)->step_state = NULL;
+
+        /*
+         * Start new thread in ret_from_fork so it schedules properly
+         * and then return from interrupt like the parent.
+         */
+        p->thread.pc = (unsigned long) ret_from_fork;
+
+        /* Save user stack top pointer so we can ID the stack vm area later. */
+        p->thread.usp0 = sp;
+
+        /* Record the pid of the process that created this one. */
+        p->thread.creator_pid = current->pid;
+
+        /*
+         * Copy the registers onto the kernel stack so the
+         * return-from-interrupt code will reload it into registers.
+         */
+        childregs = task_pt_regs(p);
+        *childregs = *regs;
+        childregs->regs[0] = 0;         /* return value is zero */
+        childregs->sp = sp;  /* override with new user stack pointer */
+
+        /*
+         * Copy the callee-saved registers from the passed pt_regs struct
+         * into the context-switch callee-saved registers area.
+         * We have to restore the callee-saved registers since we may
+         * be cloning a userspace task with userspace register state,
+         * and we won't be unwinding the same kernel frames to restore them.
+         * Zero out the C ABI save area to mark the top of the stack.
+         */
+        ksp = (unsigned long) childregs;
+        ksp -= C_ABI_SAVE_AREA_SIZE;   /* interrupt-entry save area */
+        ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
+        ksp -= CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long);
+        memcpy((void *)ksp, &regs->regs[CALLEE_SAVED_FIRST_REG],
+               CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long));
+        ksp -= C_ABI_SAVE_AREA_SIZE;   /* __switch_to() save area */
+        ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
+        p->thread.ksp = ksp;
+
+#if CHIP_HAS_TILE_DMA()
+        /*
+         * No DMA in the new thread.  We model this on the fact that
+         * fork() clears the pending signals, alarms, and aio for the child.
+         */
+        memset(&p->thread.tile_dma_state, 0, sizeof(struct tile_dma_state));
+        memset(&p->thread.dma_async_tlb, 0, sizeof(struct async_tlb));
+#endif
+
+#if CHIP_HAS_SN_PROC()
+        /* Likewise, the new thread is not running static processor code. */
+        p->thread.sn_proc_running = 0;
+        memset(&p->thread.sn_async_tlb, 0, sizeof(struct async_tlb));
+#endif
+
+#if CHIP_HAS_PROC_STATUS_SPR()
+        /* New thread has its miscellaneous processor state bits clear. */
+        p->thread.proc_status = 0;
+#endif
+
+#ifdef CONFIG_HARDWALL
+        /* New thread does not own any networks. */
+        p->thread.hardwall = NULL;
+#endif
+
+
+        /*
+         * Start the new thread with the current architecture state
+         * (user interrupt masks, etc.).
+         */
+        save_arch_state(&p->thread);
+
+        return 0;
+}
+
+/*
+ * Return "current" if it looks plausible, or else a pointer to a dummy.
+ * This can be helpful if we are just trying to emit a clean panic.
+ */
+struct task_struct *validate_current(void)
+{
+        static struct task_struct corrupt = { .comm = "<corrupt>" };
+        struct task_struct *tsk = current;
+        if (unlikely((unsigned long)tsk < PAGE_OFFSET ||
+                     (void *)tsk > high_memory ||
+                     ((unsigned long)tsk & (__alignof__(*tsk) - 1)) != 0)) {
+                pr_err("Corrupt 'current' %p (sp %#lx)\n", tsk, stack_pointer);
+                tsk = &corrupt;
+        }
+        return tsk;
+}
+
+/* Take and return the pointer to the previous task, for schedule_tail(). */
+struct task_struct *sim_notify_fork(struct task_struct *prev)
+{
+        struct task_struct *tsk = current;
+        __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_FORK_PARENT |
+                     (tsk->thread.creator_pid << _SIM_CONTROL_OPERATOR_BITS));
+        __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_FORK |
+                     (tsk->pid << _SIM_CONTROL_OPERATOR_BITS));
+        return prev;
+}
+
+int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
+{
+        struct pt_regs *ptregs = task_pt_regs(tsk);
+        elf_core_copy_regs(regs, ptregs);
+        return 1;
+}
+
+#if CHIP_HAS_TILE_DMA()
+
+/* Allow user processes to access the DMA SPRs */
+void grant_dma_mpls(void)
+{
+        __insn_mtspr(SPR_MPL_DMA_CPL_SET_0, 1);
+        __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_0, 1);
+}
+
+/* Forbid user processes from accessing the DMA SPRs */
+void restrict_dma_mpls(void)
+{
+        __insn_mtspr(SPR_MPL_DMA_CPL_SET_1, 1);
+        __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_1, 1);
+}
+
+/* Pause the DMA engine, then save off its state registers. */
+static void save_tile_dma_state(struct tile_dma_state *dma)
+{
+        unsigned long state = __insn_mfspr(SPR_DMA_USER_STATUS);
+        unsigned long post_suspend_state;
+
+        /* If we're running, suspend the engine. */
+        if ((state & DMA_STATUS_MASK) == SPR_DMA_STATUS__RUNNING_MASK)
+                __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__SUSPEND_MASK);
+
+        /*
+         * Wait for the engine to idle, then save regs.  Note that we
+         * want to record the "running" bit from before suspension,
+         * and the "done" bit from after, so that we can properly
+         * distinguish a case where the user suspended the engine from
+         * the case where the kernel suspended as part of the context
+         * swap.
+         */
+        do {
+                post_suspend_state = __insn_mfspr(SPR_DMA_USER_STATUS);
+        } while (post_suspend_state & SPR_DMA_STATUS__BUSY_MASK);
+
+        dma->src = __insn_mfspr(SPR_DMA_SRC_ADDR);
+        dma->src_chunk = __insn_mfspr(SPR_DMA_SRC_CHUNK_ADDR);
+        dma->dest = __insn_mfspr(SPR_DMA_DST_ADDR);
+        dma->dest_chunk = __insn_mfspr(SPR_DMA_DST_CHUNK_ADDR);
+        dma->strides = __insn_mfspr(SPR_DMA_STRIDE);
+        dma->chunk_size = __insn_mfspr(SPR_DMA_CHUNK_SIZE);
+        dma->byte = __insn_mfspr(SPR_DMA_BYTE);
+        dma->status = (state & SPR_DMA_STATUS__RUNNING_MASK) |
+                (post_suspend_state & SPR_DMA_STATUS__DONE_MASK);
+}
+
+/* Restart a DMA that was running before we were context-switched out. */
+static void restore_tile_dma_state(struct thread_struct *t)
+{
+        const struct tile_dma_state *dma = &t->tile_dma_state;
+
+        /*
+         * The only way to restore the done bit is to run a zero
+         * length transaction.
+         */
+        if ((dma->status & SPR_DMA_STATUS__DONE_MASK) &&
+            !(__insn_mfspr(SPR_DMA_USER_STATUS) & SPR_DMA_STATUS__DONE_MASK)) {
+                __insn_mtspr(SPR_DMA_BYTE, 0);
+                __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__REQUEST_MASK);
+                while (__insn_mfspr(SPR_DMA_USER_STATUS) &
+                       SPR_DMA_STATUS__BUSY_MASK)
+                        ;
+        }
+
+        __insn_mtspr(SPR_DMA_SRC_ADDR, dma->src);
+        __insn_mtspr(SPR_DMA_SRC_CHUNK_ADDR, dma->src_chunk);
+        __insn_mtspr(SPR_DMA_DST_ADDR, dma->dest);
+        __insn_mtspr(SPR_DMA_DST_CHUNK_ADDR, dma->dest_chunk);
+        __insn_mtspr(SPR_DMA_STRIDE, dma->strides);
+        __insn_mtspr(SPR_DMA_CHUNK_SIZE, dma->chunk_size);
+        __insn_mtspr(SPR_DMA_BYTE, dma->byte);
+
+        /*
+         * Restart the engine if we were running and not done.
+         * Clear a pending async DMA fault that we were waiting on return
+         * to user space to execute, since we expect the DMA engine
+         * to regenerate those faults for us now.  Note that we don't
+         * try to clear the TIF_ASYNC_TLB flag, since it's relatively
+         * harmless if set, and it covers both DMA and the SN processor.
+         */
+        if ((dma->status & DMA_STATUS_MASK) == SPR_DMA_STATUS__RUNNING_MASK) {
+                t->dma_async_tlb.fault_num = 0;
+                __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__REQUEST_MASK);
+        }
+}
+
+#endif
+
+static void save_arch_state(struct thread_struct *t)
+{
+#if CHIP_HAS_SPLIT_INTR_MASK()
+        t->interrupt_mask = __insn_mfspr(SPR_INTERRUPT_MASK_0_0) |
+                ((u64)__insn_mfspr(SPR_INTERRUPT_MASK_0_1) << 32);
+#else
+        t->interrupt_mask = __insn_mfspr(SPR_INTERRUPT_MASK_0);
+#endif
+        t->ex_context[0] = __insn_mfspr(SPR_EX_CONTEXT_0_0);
+        t->ex_context[1] = __insn_mfspr(SPR_EX_CONTEXT_0_1);
+        t->system_save[0] = __insn_mfspr(SPR_SYSTEM_SAVE_0_0);
+        t->system_save[1] = __insn_mfspr(SPR_SYSTEM_SAVE_0_1);
+        t->system_save[2] = __insn_mfspr(SPR_SYSTEM_SAVE_0_2);
+        t->system_save[3] = __insn_mfspr(SPR_SYSTEM_SAVE_0_3);
+        t->intctrl_0 = __insn_mfspr(SPR_INTCTRL_0_STATUS);
+#if CHIP_HAS_PROC_STATUS_SPR()
+        t->proc_status = __insn_mfspr(SPR_PROC_STATUS);
+#endif
+}
+
+static void restore_arch_state(const struct thread_struct *t)
+{
+#if CHIP_HAS_SPLIT_INTR_MASK()
+        __insn_mtspr(SPR_INTERRUPT_MASK_0_0, (u32) t->interrupt_mask);
+        __insn_mtspr(SPR_INTERRUPT_MASK_0_1, t->interrupt_mask >> 32);
+#else
+        __insn_mtspr(SPR_INTERRUPT_MASK_0, t->interrupt_mask);
+#endif
+        __insn_mtspr(SPR_EX_CONTEXT_0_0, t->ex_context[0]);
+        __insn_mtspr(SPR_EX_CONTEXT_0_1, t->ex_context[1]);
+        __insn_mtspr(SPR_SYSTEM_SAVE_0_0, t->system_save[0]);
+        __insn_mtspr(SPR_SYSTEM_SAVE_0_1, t->system_save[1]);
+        __insn_mtspr(SPR_SYSTEM_SAVE_0_2, t->system_save[2]);
+        __insn_mtspr(SPR_SYSTEM_SAVE_0_3, t->system_save[3]);
+        __insn_mtspr(SPR_INTCTRL_0_STATUS, t->intctrl_0);
+#if CHIP_HAS_PROC_STATUS_SPR()
+        __insn_mtspr(SPR_PROC_STATUS, t->proc_status);
+#endif
+#if CHIP_HAS_TILE_RTF_HWM()
+        /*
+         * Clear this whenever we switch back to a process in case
+         * the previous process was monkeying with it.  Even if enabled
+         * in CBOX_MSR1 via TILE_RTF_HWM_MIN, it's still just a
+         * performance hint, so isn't worth a full save/restore.
+         */
+        __insn_mtspr(SPR_TILE_RTF_HWM, 0);
+#endif
+}
+
+
+void _prepare_arch_switch(struct task_struct *next)
+{
+#if CHIP_HAS_SN_PROC()
+        int snctl;
+#endif
+#if CHIP_HAS_TILE_DMA()
+        struct tile_dma_state *dma = &current->thread.tile_dma_state;
+        if (dma->enabled)
+                save_tile_dma_state(dma);
+#endif
+#if CHIP_HAS_SN_PROC()
+        /*
+         * Suspend the static network processor if it was running.
+         * We do not suspend the fabric itself, just like we don't
+         * try to suspend the UDN.
+         */
+        snctl = __insn_mfspr(SPR_SNCTL);
+        current->thread.sn_proc_running =
+                (snctl & SPR_SNCTL__FRZPROC_MASK) == 0;
+        if (current->thread.sn_proc_running)
+                __insn_mtspr(SPR_SNCTL, snctl | SPR_SNCTL__FRZPROC_MASK);
+#endif
+}
+
+
+struct task_struct *__sched _switch_to(struct task_struct *prev,
+                                       struct task_struct *next)
+{
+        /* DMA state is already saved; save off other arch state. */
+        save_arch_state(&prev->thread);
+
+#if CHIP_HAS_TILE_DMA()
+        /*
+         * Restore DMA in new task if desired.
+         * Note that it is only safe to restart here since interrupts
+         * are disabled, so we can't take any DMATLB miss or access
+         * interrupts before we have finished switching stacks.
+         */
+        if (next->thread.tile_dma_state.enabled) {
+                restore_tile_dma_state(&next->thread);
+                grant_dma_mpls();
+        } else {
+                restrict_dma_mpls();
+        }
+#endif
+
+        /* Restore other arch state. */
+        restore_arch_state(&next->thread);
+
+#if CHIP_HAS_SN_PROC()
+        /*
+         * Restart static network processor in the new process
+         * if it was running before.
+         */
+        if (next->thread.sn_proc_running) {
+                int snctl = __insn_mfspr(SPR_SNCTL);
+                __insn_mtspr(SPR_SNCTL, snctl & ~SPR_SNCTL__FRZPROC_MASK);
+        }
+#endif
+
+#ifdef CONFIG_HARDWALL
+        /* Enable or disable access to the network registers appropriately. */
+        if (prev->thread.hardwall != NULL) {
+                if (next->thread.hardwall == NULL)
+                        restrict_network_mpls();
+        } else if (next->thread.hardwall != NULL) {
+                grant_network_mpls();
+        }
+#endif
+
+        /*
+         * Switch kernel SP, PC, and callee-saved registers.
+         * In the context of the new task, return the old task pointer
+         * (i.e. the task that actually called __switch_to).
+         * Pass the value to use for SYSTEM_SAVE_1_0 when we reset our sp.
+         */
+        return __switch_to(prev, next, next_current_ksp0(next));
+}
+
+long _sys_fork(struct pt_regs *regs)
+{
+        return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
+}
+
+long _sys_clone(unsigned long clone_flags, unsigned long newsp,
+                void __user *parent_tidptr, void __user *child_tidptr,
+                struct pt_regs *regs)
+{
+        if (!newsp)
+                newsp = regs->sp;
+        return do_fork(clone_flags, newsp, regs, 0,
+                       parent_tidptr, child_tidptr);
+}
+
+long _sys_vfork(struct pt_regs *regs)
+{
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp,
+                       regs, 0, NULL, NULL);
+}
+
+/*
+ * sys_execve() executes a new program.
+ */
+long _sys_execve(const char __user *path,
+                 const char __user *const __user *argv,
+                 const char __user *const __user *envp, struct pt_regs *regs)
+{
+        long error;
+        char *filename;
+
+        filename = getname(path);
+        error = PTR_ERR(filename);
+        if (IS_ERR(filename))
+                goto out;
+        error = do_execve(filename, argv, envp, regs);
+        putname(filename);
+out:
+        return error;
+}
+
+#ifdef CONFIG_COMPAT
+long _compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
+                        compat_uptr_t __user *envp, struct pt_regs *regs)
+{
+        long error;
+        char *filename;
+
+        filename = getname(path);
+        error = PTR_ERR(filename);
+        if (IS_ERR(filename))
+                goto out;
+        error = compat_do_execve(filename, argv, envp, regs);
+        putname(filename);
+out:
+        return error;
+}
+#endif
+
+unsigned long get_wchan(struct task_struct *p)
+{
+        struct KBacktraceIterator kbt;
+
+        if (!p || p == current || p->state == TASK_RUNNING)
+                return 0;
+
+        for (KBacktraceIterator_init(&kbt, p, NULL);
+             !KBacktraceIterator_end(&kbt);
+             KBacktraceIterator_next(&kbt)) {
+                if (!in_sched_functions(kbt.it.pc))
+                        return kbt.it.pc;
+        }
+
+        return 0;
+}
+
+/*
+ * We pass in lr as zero (cleared in kernel_thread) and the caller
+ * part of the backtrace ABI on the stack also zeroed (in copy_thread)
+ * so that backtraces will stop with this function.
+ * Note that we don't use r0, since copy_thread() clears it.
+ */
+static void start_kernel_thread(int dummy, int (*fn)(int), int arg)
+{
+        do_exit(fn(arg));
+}
+
+/*
+ * Create a kernel thread
+ */
+int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+        struct pt_regs regs;
+
+        memset(&regs, 0, sizeof(regs));
+        regs.ex1 = PL_ICS_EX1(KERNEL_PL, 0);  /* run at kernel PL, no ICS */
+        regs.pc = (long) start_kernel_thread;
+        regs.flags = PT_FLAGS_CALLER_SAVES;   /* need to restore r1 and r2 */
+        regs.regs[1] = (long) fn;             /* function pointer */
+        regs.regs[2] = (long) arg;            /* parameter register */
+
+        /* Ok, create the new process.. */
+        return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs,
+                       0, NULL, NULL);
+}
+EXPORT_SYMBOL(kernel_thread);
+
+/* Flush thread state. */
+void flush_thread(void)
+{
+        /* Nothing */
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+void exit_thread(void)
+{
+        /* Nothing */
+}
+
+void show_regs(struct pt_regs *regs)
+{
+        struct task_struct *tsk = validate_current();
+        int i;
+
+        pr_err("\n");
+        pr_err(" Pid: %d, comm: %20s, CPU: %d\n",
+               tsk->pid, tsk->comm, smp_processor_id());
+#ifdef __tilegx__
+        for (i = 0; i < 51; i += 3)
+                pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT" r%-2d: "REGFMT"\n",
+                       i, regs->regs[i], i+1, regs->regs[i+1],
+                       i+2, regs->regs[i+2]);
+        pr_err(" r51: "REGFMT" r52: "REGFMT" tp : "REGFMT"\n",
+               regs->regs[51], regs->regs[52], regs->tp);
+        pr_err(" sp : "REGFMT" lr : "REGFMT"\n", regs->sp, regs->lr);
+#else
+        for (i = 0; i < 52; i += 3)
+                pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT
+                       " r%-2d: "REGFMT" r%-2d: "REGFMT"\n",
+                       i, regs->regs[i], i+1, regs->regs[i+1],
+                       i+2, regs->regs[i+2], i+3, regs->regs[i+3]);
+        pr_err(" r52: "REGFMT" tp : "REGFMT" sp : "REGFMT" lr : "REGFMT"\n",
+               regs->regs[52], regs->tp, regs->sp, regs->lr);
+#endif
+        pr_err(" pc : "REGFMT" ex1: %ld     faultnum: %ld\n",
+               regs->pc, regs->ex1, regs->faultnum);
+
+        dump_stack_regs(regs);
+}
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
new file mode 100644
index 000000000000..7161bd03d2fd
--- /dev/null
+++ b/arch/tile/kernel/ptrace.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Copied from i386: Ross Biro 1/23/92
+ */
+
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/kprobes.h>
+#include <linux/compat.h>
+#include <linux/uaccess.h>
+#include <asm/traps.h>
+
+void user_enable_single_step(struct task_struct *child)
+{
+        set_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+        clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+/*
+ * This routine will put a word on the process's privileged stack.
+ */
+static void putreg(struct task_struct *task,
+                   unsigned long addr, unsigned long value)
+{
+        unsigned int regno = addr / sizeof(unsigned long);
+        struct pt_regs *childregs = task_pt_regs(task);
+        childregs->regs[regno] = value;
+        childregs->flags |= PT_FLAGS_RESTORE_REGS;
+}
+
+static unsigned long getreg(struct task_struct *task, unsigned long addr)
+{
+        unsigned int regno = addr / sizeof(unsigned long);
+        struct pt_regs *childregs = task_pt_regs(task);
+        return childregs->regs[regno];
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ */
+void ptrace_disable(struct task_struct *child)
+{
+        clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+
+        /*
+         * These two are currently unused, but will be set by arch_ptrace()
+         * and used in the syscall assembly when we do support them.
+         */
+        clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+}
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+        unsigned long __user *datap;
+        unsigned long tmp;
+        int i;
+        long ret = -EIO;
+
+#ifdef CONFIG_COMPAT
+        if (task_thread_info(current)->status & TS_COMPAT)
+                data = (u32)data;
+        if (task_thread_info(child)->status & TS_COMPAT)
+                addr = (u32)addr;
+#endif
+        datap = (unsigned long __user __force *)data;
+
+        switch (request) {
+
+        case PTRACE_PEEKUSR:  /* Read register from pt_regs. */
+                if (addr & (sizeof(data)-1))
+                        break;
+                if (addr < 0 || addr >= PTREGS_SIZE)
+                        break;
+                tmp = getreg(child, addr);   /* Read register */
+                ret = put_user(tmp, datap);
+                break;
+
+        case PTRACE_POKEUSR:  /* Write register in pt_regs. */
+                if (addr & (sizeof(data)-1))
+                        break;
+                if (addr < 0 || addr >= PTREGS_SIZE)
+                        break;
+                putreg(child, addr, data);   /* Write register */
+                ret = 0;
+                break;
+
+        case PTRACE_GETREGS:  /* Get all registers from the child. */
+                if (!access_ok(VERIFY_WRITE, datap, PTREGS_SIZE))
+                        break;
+                for (i = 0; i < PTREGS_SIZE; i += sizeof(long)) {
+                        ret = __put_user(getreg(child, i), datap);
+                        if (ret != 0)
+                                break;
+                        datap++;
+                }
+                break;
+
+        case PTRACE_SETREGS:  /* Set all registers in the child. */
+                if (!access_ok(VERIFY_READ, datap, PTREGS_SIZE))
+                        break;
+                for (i = 0; i < PTREGS_SIZE; i += sizeof(long)) {
+                        ret = __get_user(tmp, datap);
+                        if (ret != 0)
+                                break;
+                        putreg(child, i, tmp);
+                        datap++;
+                }
+                break;
+
+        case PTRACE_GETFPREGS:  /* Get the child FPU state. */
+        case PTRACE_SETFPREGS:  /* Set the child FPU state. */
+                break;
+
+        case PTRACE_SETOPTIONS:
+                /* Support TILE-specific ptrace options. */
+                child->ptrace &= ~PT_TRACE_MASK_TILE;
+                tmp = data & PTRACE_O_MASK_TILE;
+                data &= ~PTRACE_O_MASK_TILE;
+                ret = ptrace_request(child, request, addr, data);
+                if (tmp & PTRACE_O_TRACEMIGRATE)
+                        child->ptrace |= PT_TRACE_MIGRATE;
+                break;
+
+        default:
+#ifdef CONFIG_COMPAT
+                if (task_thread_info(current)->status & TS_COMPAT) {
+                        ret = compat_ptrace_request(child, request,
+                                                    addr, data);
+                        break;
+                }
+#endif
+                ret = ptrace_request(child, request, addr, data);
+                break;
+        }
+
+        return ret;
+}
+
+#ifdef CONFIG_COMPAT
+/* Not used; we handle compat issues in arch_ptrace() directly. */
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+                               compat_ulong_t addr, compat_ulong_t data)
+{
+        BUG();
+}
+#endif
+
+void do_syscall_trace(void)
+{
+        if (!test_thread_flag(TIF_SYSCALL_TRACE))
+                return;
+
+        if (!(current->ptrace & PT_PTRACED))
+                return;
+
+        /*
+         * The 0x80 provides a way for the tracing parent to distinguish
+         * between a syscall stop and SIGTRAP delivery
+         */
+        ptrace_notify(SIGTRAP|((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0));
+
+        /*
+         * this isn't the same as continuing with a signal, but it will do
+         * for normal use.  strace only continues with a signal if the
+         * stopping signal is not SIGTRAP.  -brl
+         */
+        if (current->exit_code) {
+                send_sig(current->exit_code, current, 1);
+                current->exit_code = 0;
+        }
+}
+
+void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)
+{
+        struct siginfo info;
+
+        memset(&info, 0, sizeof(info));
+        info.si_signo = SIGTRAP;
+        info.si_code  = TRAP_BRKPT;
+        info.si_addr  = (void __user *) regs->pc;
+
+        /* Send us the fakey SIGTRAP */
+        force_sig_info(SIGTRAP, &info, tsk);
+}
+
+/* Handle synthetic interrupt delivered only by the simulator. */
+void __kprobes do_breakpoint(struct pt_regs* regs, int fault_num)
+{
+        send_sigtrap(current, regs, fault_num);
+}
diff --git a/arch/tile/kernel/reboot.c b/arch/tile/kernel/reboot.c
new file mode 100644
index 000000000000..acd86d20beba
--- /dev/null
+++ b/arch/tile/kernel/reboot.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/stddef.h>
+#include <linux/reboot.h>
+#include <linux/smp.h>
+#include <linux/pm.h>
+#include <asm/page.h>
+#include <asm/setup.h>
+#include <hv/hypervisor.h>
+
+#ifndef CONFIG_SMP
+#define smp_send_stop()
+#endif
+
+void machine_halt(void)
+{
+        warn_early_printk();
+        raw_local_irq_disable_all();
+        smp_send_stop();
+        hv_halt();
+}
+
+void machine_power_off(void)
+{
+        warn_early_printk();
+        raw_local_irq_disable_all();
+        smp_send_stop();
+        hv_power_off();
+}
+
+void machine_restart(char *cmd)
+{
+        raw_local_irq_disable_all();
+        smp_send_stop();
+        hv_restart((HV_VirtAddr) "vmlinux", (HV_VirtAddr) cmd);
+}
+
+/* No interesting distinction to be made here. */
+void (*pm_power_off)(void) = NULL;
diff --git a/arch/tile/kernel/regs_32.S b/arch/tile/kernel/regs_32.S
new file mode 100644
index 000000000000..e88d6e122783
--- /dev/null
+++ b/arch/tile/kernel/regs_32.S
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/linkage.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/asm-offsets.h>
+#include <arch/spr_def.h>
+#include <asm/processor.h>
+
+/*
+ * See <asm/system.h>; called with prev and next task_struct pointers.
+ * "prev" is returned in r0 for _switch_to and also for ret_from_fork.
+ *
+ * We want to save pc/sp in "prev", and get the new pc/sp from "next".
+ * We also need to save all the callee-saved registers on the stack.
+ *
+ * Intel enables/disables access to the hardware cycle counter in
+ * seccomp (secure computing) environments if necessary, based on
+ * has_secure_computing().  We might want to do this at some point,
+ * though it would require virtualizing the other SPRs under WORLD_ACCESS.
+ *
+ * Since we're saving to the stack, we omit sp from this list.
+ * And for parallels with other architectures, we save lr separately,
+ * in the thread_struct itself (as the "pc" field).
+ *
+ * This code also needs to be aligned with process.c copy_thread()
+ */
+
+#if CALLEE_SAVED_REGS_COUNT != 24
+# error Mismatch between <asm/system.h> and kernel/entry.S
+#endif
+#define FRAME_SIZE ((2 + CALLEE_SAVED_REGS_COUNT) * 4)
+
+#define SAVE_REG(r) { sw r12, r; addi r12, r12, 4 }
+#define LOAD_REG(r) { lw r, r12; addi r12, r12, 4 }
+#define FOR_EACH_CALLEE_SAVED_REG(f)                                    \
+                                                        f(r30); f(r31); \
+        f(r32); f(r33); f(r34); f(r35); f(r36); f(r37); f(r38); f(r39); \
+        f(r40); f(r41); f(r42); f(r43); f(r44); f(r45); f(r46); f(r47); \
+        f(r48); f(r49); f(r50); f(r51); f(r52);
+
+STD_ENTRY_SECTION(__switch_to, .sched.text)
+        {
+          move r10, sp
+          sw sp, lr
+          addi sp, sp, -FRAME_SIZE
+        }
+        {
+          addi r11, sp, 4
+          addi r12, sp, 8
+        }
+        {
+          sw r11, r10
+          addli r4, r1, TASK_STRUCT_THREAD_KSP_OFFSET
+        }
+        {
+          lw r13, r4   /* Load new sp to a temp register early. */
+          addli r3, r0, TASK_STRUCT_THREAD_KSP_OFFSET
+        }
+        FOR_EACH_CALLEE_SAVED_REG(SAVE_REG)
+        {
+          sw r3, sp
+          addli r3, r0, TASK_STRUCT_THREAD_PC_OFFSET
+        }
+        {
+          sw r3, lr
+          addli r4, r1, TASK_STRUCT_THREAD_PC_OFFSET
+        }
+        {
+          lw lr, r4
+          addi r12, r13, 8
+        }
+        {
+          /* Update sp and ksp0 simultaneously to avoid backtracer warnings. */
+          move sp, r13
+          mtspr SYSTEM_SAVE_1_0, r2
+        }
+        FOR_EACH_CALLEE_SAVED_REG(LOAD_REG)
+.L__switch_to_pc:
+        {
+          addi sp, sp, FRAME_SIZE
+          jrp lr   /* r0 is still valid here, so return it */
+        }
+        STD_ENDPROC(__switch_to)
+
+/* Return a suitable address for the backtracer for suspended threads */
+STD_ENTRY_SECTION(get_switch_to_pc, .sched.text)
+        lnk r0
+        {
+          addli r0, r0, .L__switch_to_pc - .
+          jrp lr
+        }
+        STD_ENDPROC(get_switch_to_pc)
+
+STD_ENTRY(get_pt_regs)
+        .irp reg, r0, r1, r2, r3, r4, r5, r6, r7, \
+                 r8, r9, r10, r11, r12, r13, r14, r15, \
+                 r16, r17, r18, r19, r20, r21, r22, r23, \
+                 r24, r25, r26, r27, r28, r29, r30, r31, \
+                 r32, r33, r34, r35, r36, r37, r38, r39, \
+                 r40, r41, r42, r43, r44, r45, r46, r47, \
+                 r48, r49, r50, r51, r52, tp, sp
+        {
+         sw r0, \reg
+         addi r0, r0, 4
+        }
+        .endr
+        {
+         sw r0, lr
+         addi r0, r0, PTREGS_OFFSET_PC - PTREGS_OFFSET_LR
+        }
+        lnk r1
+        {
+         sw r0, r1
+         addi r0, r0, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC
+        }
+        mfspr r1, INTERRUPT_CRITICAL_SECTION
+        shli r1, r1, SPR_EX_CONTEXT_1_1__ICS_SHIFT
+        ori r1, r1, KERNEL_PL
+        {
+         sw r0, r1
+         addi r0, r0, PTREGS_OFFSET_FAULTNUM - PTREGS_OFFSET_EX1
+        }
+        {
+         sw r0, zero       /* clear faultnum */
+         addi r0, r0, PTREGS_OFFSET_ORIG_R0 - PTREGS_OFFSET_FAULTNUM
+        }
+        {
+         sw r0, zero       /* clear orig_r0 */
+         addli r0, r0, -PTREGS_OFFSET_ORIG_R0    /* restore r0 to base */
+        }
+        jrp lr
+        STD_ENDPROC(get_pt_regs)
diff --git a/arch/tile/kernel/relocate_kernel.S b/arch/tile/kernel/relocate_kernel.S
new file mode 100644
index 000000000000..010b418515f8
--- /dev/null
+++ b/arch/tile/kernel/relocate_kernel.S
@@ -0,0 +1,280 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * copy new kernel into place and then call hv_reexec
+ *
+ */
+
+#include <linux/linkage.h>
+#include <arch/chip.h>
+#include <asm/page.h>
+#include <hv/hypervisor.h>
+
+#define ___hvb  MEM_SV_INTRPT + HV_GLUE_START_CPA
+
+#define ___hv_dispatch(f) (___hvb + (HV_DISPATCH_ENTRY_SIZE * f))
+
+#define ___hv_console_putc ___hv_dispatch(HV_DISPATCH_CONSOLE_PUTC)
+#define ___hv_halt         ___hv_dispatch(HV_DISPATCH_HALT)
+#define ___hv_reexec       ___hv_dispatch(HV_DISPATCH_REEXEC)
+#define ___hv_flush_remote ___hv_dispatch(HV_DISPATCH_FLUSH_REMOTE)
+
+#undef RELOCATE_NEW_KERNEL_VERBOSE
+
+STD_ENTRY(relocate_new_kernel)
+
+        move    r30, r0         /* page list */
+        move    r31, r1         /* address of page we are on */
+        move    r32, r2         /* start address of new kernel */
+
+        shri    r1, r1, PAGE_SHIFT
+        addi    r1, r1, 1
+        shli    sp, r1, PAGE_SHIFT
+        addi    sp, sp, -8
+        /* we now have a stack (whether we need one or not) */
+
+        moveli  r40, lo16(___hv_console_putc)
+        auli    r40, r40, ha16(___hv_console_putc)
+
+#ifdef RELOCATE_NEW_KERNEL_VERBOSE
+        moveli  r0, 'r'
+        jalr    r40
+
+        moveli  r0, '_'
+        jalr    r40
+
+        moveli  r0, 'n'
+        jalr    r40
+
+        moveli  r0, '_'
+        jalr    r40
+
+        moveli  r0, 'k'
+        jalr    r40
+
+        moveli  r0, '\n'
+        jalr    r40
+#endif
+
+        /*
+         * Throughout this code r30 is pointer to the element of page
+         * list we are working on.
+         *
+         * Normally we get to the next element of the page list by
+         * incrementing r30 by four.  The exception is if the element
+         * on the page list is an IND_INDIRECTION in which case we use
+         * the element with the low bits masked off as the new value
+         * of r30.
+         *
+         * To get this started, we need the value passed to us (which
+         * will always be an IND_INDIRECTION) in memory somewhere with
+         * r30 pointing at it.  To do that, we push the value passed
+         * to us on the stack and make r30 point to it.
+         */
+
+        sw      sp, r30
+        move    r30, sp
+        addi    sp, sp, -8
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        /*
+         * On TILEPro, we need to flush all tiles' caches, since we may
+         * have been doing hash-for-home caching there.  Note that we
+         * must do this _after_ we're completely done modifying any memory
+         * other than our output buffer (which we know is locally cached).
+         * We want the caches to be fully clean when we do the reexec,
+         * because the hypervisor is going to do this flush again at that
+         * point, and we don't want that second flush to overwrite any memory.
+         */
+        {
+         move   r0, zero         /* cache_pa */
+         move   r1, zero
+        }
+        {
+         auli   r2, zero, ha16(HV_FLUSH_EVICT_L2) /* cache_control */
+         movei  r3, -1           /* cache_cpumask; -1 means all client tiles */
+        }
+        {
+         move   r4, zero         /* tlb_va */
+         move   r5, zero         /* tlb_length */
+        }
+        {
+         move   r6, zero         /* tlb_pgsize */
+         move   r7, zero         /* tlb_cpumask */
+        }
+        {
+         move   r8, zero         /* asids */
+         moveli r20, lo16(___hv_flush_remote)
+        }
+        {
+         move   r9, zero         /* asidcount */
+         auli   r20, r20, ha16(___hv_flush_remote)
+        }
+
+        jalr    r20
+#endif
+
+        /* r33 is destination pointer, default to zero */
+
+        moveli  r33, 0
+
+.Lloop: lw      r10, r30
+
+        andi    r9, r10, 0xf    /* low 4 bits tell us what type it is */
+        xor     r10, r10, r9    /* r10 is now value with low 4 bits stripped */
+
+        seqi    r0, r9, 0x1     /* IND_DESTINATION */
+        bzt     r0, .Ltry2
+
+        move    r33, r10
+
+#ifdef RELOCATE_NEW_KERNEL_VERBOSE
+        moveli  r0, 'd'
+        jalr    r40
+#endif
+
+        addi    r30, r30, 4
+        j       .Lloop
+
+.Ltry2:
+        seqi    r0, r9, 0x2     /* IND_INDIRECTION */
+        bzt     r0, .Ltry4
+
+        move    r30, r10
+
+#ifdef RELOCATE_NEW_KERNEL_VERBOSE
+        moveli  r0, 'i'
+        jalr    r40
+#endif
+
+        j       .Lloop
+
+.Ltry4:
+        seqi    r0, r9, 0x4     /* IND_DONE */
+        bzt     r0, .Ltry8
+
+        mf
+
+#ifdef RELOCATE_NEW_KERNEL_VERBOSE
+        moveli  r0, 'D'
+        jalr    r40
+        moveli  r0, '\n'
+        jalr    r40
+#endif
+
+        move    r0, r32
+        moveli  r1, 0           /* arg to hv_reexec is 64 bits */
+
+        moveli  r41, lo16(___hv_reexec)
+        auli    r41, r41, ha16(___hv_reexec)
+
+        jalr    r41
+
+        /* we should not get here */
+
+        moveli  r0, '?'
+        jalr    r40
+        moveli  r0, '\n'
+        jalr    r40
+
+        j       .Lhalt
+
+.Ltry8: seqi    r0, r9, 0x8     /* IND_SOURCE */
+        bz      r0, .Lerr       /* unknown type */
+
+        /* copy page at r10 to page at r33 */
+
+        move    r11, r33
+
+        moveli  r0, lo16(PAGE_SIZE)
+        auli    r0, r0, ha16(PAGE_SIZE)
+        add     r33, r33, r0
+
+        /* copy word at r10 to word at r11 until r11 equals r33 */
+
+        /* We know page size must be multiple of 16, so we can unroll
+         * 16 times safely without any edge case checking.
+         *
+         * Issue a flush of the destination every 16 words to avoid
+         * incoherence when starting the new kernel.  (Now this is
+         * just good paranoia because the hv_reexec call will also
+         * take care of this.)
+         */
+
+1:
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0; addi   r11, r11, 4 }
+        { lw    r0, r10; addi   r10, r10, 4 }
+        { sw    r11, r0 }
+        { flush r11    ; addi   r11, r11, 4 }
+
+        seq     r0, r33, r11
+        bzt     r0, 1b
+
+#ifdef RELOCATE_NEW_KERNEL_VERBOSE
+        moveli  r0, 's'
+        jalr    r40
+#endif
+
+        addi    r30, r30, 4
+        j       .Lloop
+
+
+.Lerr:  moveli  r0, 'e'
+        jalr    r40
+        moveli  r0, 'r'
+        jalr    r40
+        moveli  r0, 'r'
+        jalr    r40
+        moveli  r0, '\n'
+        jalr    r40
+.Lhalt:
+        moveli  r41, lo16(___hv_halt)
+        auli    r41, r41, ha16(___hv_halt)
+
+        jalr    r41
+        STD_ENDPROC(relocate_new_kernel)
+
+        .section .rodata,"a"
+
+        .globl relocate_new_kernel_size
+relocate_new_kernel_size:
+        .long .Lend_relocate_new_kernel - relocate_new_kernel
diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
new file mode 100644
index 000000000000..e7d54c73d5c1
--- /dev/null
+++ b/arch/tile/kernel/setup.c
@@ -0,0 +1,1511 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mmzone.h>
+#include <linux/bootmem.h>
+#include <linux/module.h>
+#include <linux/node.h>
+#include <linux/cpu.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+#include <linux/kexec.h>
+#include <linux/pci.h>
+#include <linux/initrd.h>
+#include <linux/io.h>
+#include <linux/highmem.h>
+#include <linux/smp.h>
+#include <linux/timex.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/sections.h>
+#include <asm/cacheflush.h>
+#include <asm/cacheflush.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <hv/hypervisor.h>
+#include <arch/interrupts.h>
+
+/* <linux/smp.h> doesn't provide this definition. */
+#ifndef CONFIG_SMP
+#define setup_max_cpus 1
+#endif
+
+static inline int ABS(int x) { return x >= 0 ? x : -x; }
+
+/* Chip information */
+char chip_model[64] __write_once;
+
+struct pglist_data node_data[MAX_NUMNODES] __read_mostly;
+EXPORT_SYMBOL(node_data);
+
+/* We only create bootmem data on node 0. */
+static bootmem_data_t __initdata node0_bdata;
+
+/* Information on the NUMA nodes that we compute early */
+unsigned long __cpuinitdata node_start_pfn[MAX_NUMNODES];
+unsigned long __cpuinitdata node_end_pfn[MAX_NUMNODES];
+unsigned long __initdata node_memmap_pfn[MAX_NUMNODES];
+unsigned long __initdata node_percpu_pfn[MAX_NUMNODES];
+unsigned long __initdata node_free_pfn[MAX_NUMNODES];
+
+#ifdef CONFIG_HIGHMEM
+/* Page frame index of end of lowmem on each controller. */
+unsigned long __cpuinitdata node_lowmem_end_pfn[MAX_NUMNODES];
+
+/* Number of pages that can be mapped into lowmem. */
+static unsigned long __initdata mappable_physpages;
+#endif
+
+/* Data on which physical memory controller corresponds to which NUMA node */
+int node_controller[MAX_NUMNODES] = { [0 ... MAX_NUMNODES-1] = -1 };
+
+#ifdef CONFIG_HIGHMEM
+/* Map information from VAs to PAs */
+unsigned long pbase_map[1 << (32 - HPAGE_SHIFT)]
+  __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+EXPORT_SYMBOL(pbase_map);
+
+/* Map information from PAs to VAs */
+void *vbase_map[NR_PA_HIGHBIT_VALUES]
+  __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+EXPORT_SYMBOL(vbase_map);
+#endif
+
+/* Node number as a function of the high PA bits */
+int highbits_to_node[NR_PA_HIGHBIT_VALUES] __write_once;
+EXPORT_SYMBOL(highbits_to_node);
+
+static unsigned int __initdata maxmem_pfn = -1U;
+static unsigned int __initdata maxnodemem_pfn[MAX_NUMNODES] = {
+        [0 ... MAX_NUMNODES-1] = -1U
+};
+static nodemask_t __initdata isolnodes;
+
+#ifdef CONFIG_PCI
+enum { DEFAULT_PCI_RESERVE_MB = 64 };
+static unsigned int __initdata pci_reserve_mb = DEFAULT_PCI_RESERVE_MB;
+unsigned long __initdata pci_reserve_start_pfn = -1U;
+unsigned long __initdata pci_reserve_end_pfn = -1U;
+#endif
+
+static int __init setup_maxmem(char *str)
+{
+        long maxmem_mb;
+        if (str == NULL || strict_strtol(str, 0, &maxmem_mb) != 0 ||
+            maxmem_mb == 0)
+                return -EINVAL;
+
+        maxmem_pfn = (maxmem_mb >> (HPAGE_SHIFT - 20)) <<
+                (HPAGE_SHIFT - PAGE_SHIFT);
+        pr_info("Forcing RAM used to no more than %dMB\n",
+               maxmem_pfn >> (20 - PAGE_SHIFT));
+        return 0;
+}
+early_param("maxmem", setup_maxmem);
+
+static int __init setup_maxnodemem(char *str)
+{
+        char *endp;
+        long maxnodemem_mb, node;
+
+        node = str ? simple_strtoul(str, &endp, 0) : INT_MAX;
+        if (node >= MAX_NUMNODES || *endp != ':' ||
+            strict_strtol(endp+1, 0, &maxnodemem_mb) != 0)
+                return -EINVAL;
+
+        maxnodemem_pfn[node] = (maxnodemem_mb >> (HPAGE_SHIFT - 20)) <<
+                (HPAGE_SHIFT - PAGE_SHIFT);
+        pr_info("Forcing RAM used on node %ld to no more than %dMB\n",
+               node, maxnodemem_pfn[node] >> (20 - PAGE_SHIFT));
+        return 0;
+}
+early_param("maxnodemem", setup_maxnodemem);
+
+static int __init setup_isolnodes(char *str)
+{
+        char buf[MAX_NUMNODES * 5];
+        if (str == NULL || nodelist_parse(str, isolnodes) != 0)
+                return -EINVAL;
+
+        nodelist_scnprintf(buf, sizeof(buf), isolnodes);
+        pr_info("Set isolnodes value to '%s'\n", buf);
+        return 0;
+}
+early_param("isolnodes", setup_isolnodes);
+
+#ifdef CONFIG_PCI
+static int __init setup_pci_reserve(char* str)
+{
+        unsigned long mb;
+
+        if (str == NULL || strict_strtoul(str, 0, &mb) != 0 ||
+            mb > 3 * 1024)
+                return -EINVAL;
+
+        pci_reserve_mb = mb;
+        pr_info("Reserving %dMB for PCIE root complex mappings\n",
+               pci_reserve_mb);
+        return 0;
+}
+early_param("pci_reserve", setup_pci_reserve);
+#endif
+
+#ifndef __tilegx__
+/*
+ * vmalloc=size forces the vmalloc area to be exactly 'size' bytes.
+ * This can be used to increase (or decrease) the vmalloc area.
+ */
+static int __init parse_vmalloc(char *arg)
+{
+        if (!arg)
+                return -EINVAL;
+
+        VMALLOC_RESERVE = (memparse(arg, &arg) + PGDIR_SIZE - 1) & PGDIR_MASK;
+
+        /* See validate_va() for more on this test. */
+        if ((long)_VMALLOC_START >= 0)
+                early_panic("\"vmalloc=%#lx\" value too large: maximum %#lx\n",
+                            VMALLOC_RESERVE, _VMALLOC_END - 0x80000000UL);
+
+        return 0;
+}
+early_param("vmalloc", parse_vmalloc);
+#endif
+
+#ifdef CONFIG_HIGHMEM
+/*
+ * Determine for each controller where its lowmem is mapped and how
+ * much of it is mapped there.  On controller zero, the first few
+ * megabytes are mapped at 0xfd000000 as code, so in principle we
+ * could start our data mappings higher up, but for now we don't
+ * bother, to avoid additional confusion.
+ *
+ * One question is whether, on systems with more than 768 Mb and
+ * controllers of different sizes, to map in a proportionate amount of
+ * each one, or to try to map the same amount from each controller.
+ * (E.g. if we have three controllers with 256MB, 1GB, and 256MB
+ * respectively, do we map 256MB from each, or do we map 128 MB, 512
+ * MB, and 128 MB respectively?)  For now we use a proportionate
+ * solution like the latter.
+ *
+ * The VA/PA mapping demands that we align our decisions at 16 MB
+ * boundaries so that we can rapidly convert VA to PA.
+ */
+static void *__init setup_pa_va_mapping(void)
+{
+        unsigned long curr_pages = 0;
+        unsigned long vaddr = PAGE_OFFSET;
+        nodemask_t highonlynodes = isolnodes;
+        int i, j;
+
+        memset(pbase_map, -1, sizeof(pbase_map));
+        memset(vbase_map, -1, sizeof(vbase_map));
+
+        /* Node zero cannot be isolated for LOWMEM purposes. */
+        node_clear(0, highonlynodes);
+
+        /* Count up the number of pages on non-highonlynodes controllers. */
+        mappable_physpages = 0;
+        for_each_online_node(i) {
+                if (!node_isset(i, highonlynodes))
+                        mappable_physpages +=
+                                node_end_pfn[i] - node_start_pfn[i];
+        }
+
+        for_each_online_node(i) {
+                unsigned long start = node_start_pfn[i];
+                unsigned long end = node_end_pfn[i];
+                unsigned long size = end - start;
+                unsigned long vaddr_end;
+
+                if (node_isset(i, highonlynodes)) {
+                        /* Mark this controller as having no lowmem. */
+                        node_lowmem_end_pfn[i] = start;
+                        continue;
+                }
+
+                curr_pages += size;
+                if (mappable_physpages > MAXMEM_PFN) {
+                        vaddr_end = PAGE_OFFSET +
+                                (((u64)curr_pages * MAXMEM_PFN /
+                                  mappable_physpages)
+                                 << PAGE_SHIFT);
+                } else {
+                        vaddr_end = PAGE_OFFSET + (curr_pages << PAGE_SHIFT);
+                }
+                for (j = 0; vaddr < vaddr_end; vaddr += HPAGE_SIZE, ++j) {
+                        unsigned long this_pfn =
+                                start + (j << HUGETLB_PAGE_ORDER);
+                        pbase_map[vaddr >> HPAGE_SHIFT] = this_pfn;
+                        if (vbase_map[__pfn_to_highbits(this_pfn)] ==
+                            (void *)-1)
+                                vbase_map[__pfn_to_highbits(this_pfn)] =
+                                        (void *)(vaddr & HPAGE_MASK);
+                }
+                node_lowmem_end_pfn[i] = start + (j << HUGETLB_PAGE_ORDER);
+                BUG_ON(node_lowmem_end_pfn[i] > end);
+        }
+
+        /* Return highest address of any mapped memory. */
+        return (void *)vaddr;
+}
+#endif /* CONFIG_HIGHMEM */
+
+/*
+ * Register our most important memory mappings with the debug stub.
+ *
+ * This is up to 4 mappings for lowmem, one mapping per memory
+ * controller, plus one for our text segment.
+ */
+static void __cpuinit store_permanent_mappings(void)
+{
+        int i;
+
+        for_each_online_node(i) {
+                HV_PhysAddr pa = ((HV_PhysAddr)node_start_pfn[i]) << PAGE_SHIFT;
+#ifdef CONFIG_HIGHMEM
+                HV_PhysAddr high_mapped_pa = node_lowmem_end_pfn[i];
+#else
+                HV_PhysAddr high_mapped_pa = node_end_pfn[i];
+#endif
+
+                unsigned long pages = high_mapped_pa - node_start_pfn[i];
+                HV_VirtAddr addr = (HV_VirtAddr) __va(pa);
+                hv_store_mapping(addr, pages << PAGE_SHIFT, pa);
+        }
+
+        hv_store_mapping((HV_VirtAddr)_stext,
+                         (uint32_t)(_einittext - _stext), 0);
+}
+
+/*
+ * Use hv_inquire_physical() to populate node_{start,end}_pfn[]
+ * and node_online_map, doing suitable sanity-checking.
+ * Also set min_low_pfn, max_low_pfn, and max_pfn.
+ */
+static void __init setup_memory(void)
+{
+        int i, j;
+        int highbits_seen[NR_PA_HIGHBIT_VALUES] = { 0 };
+#ifdef CONFIG_HIGHMEM
+        long highmem_pages;
+#endif
+#ifndef __tilegx__
+        int cap;
+#endif
+#if defined(CONFIG_HIGHMEM) || defined(__tilegx__)
+        long lowmem_pages;
+#endif
+
+        /* We are using a char to hold the cpu_2_node[] mapping */
+        BUG_ON(MAX_NUMNODES > 127);
+
+        /* Discover the ranges of memory available to us */
+        for (i = 0; ; ++i) {
+                unsigned long start, size, end, highbits;
+                HV_PhysAddrRange range = hv_inquire_physical(i);
+                if (range.size == 0)
+                        break;
+#ifdef CONFIG_FLATMEM
+                if (i > 0) {
+                        pr_err("Can't use discontiguous PAs: %#llx..%#llx\n",
+                               range.size, range.start + range.size);
+                        continue;
+                }
+#endif
+#ifndef __tilegx__
+                if ((unsigned long)range.start) {
+                        pr_err("Range not at 4GB multiple: %#llx..%#llx\n",
+                               range.start, range.start + range.size);
+                        continue;
+                }
+#endif
+                if ((range.start & (HPAGE_SIZE-1)) != 0 ||
+                    (range.size & (HPAGE_SIZE-1)) != 0) {
+                        unsigned long long start_pa = range.start;
+                        unsigned long long orig_size = range.size;
+                        range.start = (start_pa + HPAGE_SIZE - 1) & HPAGE_MASK;
+                        range.size -= (range.start - start_pa);
+                        range.size &= HPAGE_MASK;
+                        pr_err("Range not hugepage-aligned: %#llx..%#llx:"
+                               " now %#llx-%#llx\n",
+                               start_pa, start_pa + orig_size,
+                               range.start, range.start + range.size);
+                }
+                highbits = __pa_to_highbits(range.start);
+                if (highbits >= NR_PA_HIGHBIT_VALUES) {
+                        pr_err("PA high bits too high: %#llx..%#llx\n",
+                               range.start, range.start + range.size);
+                        continue;
+                }
+                if (highbits_seen[highbits]) {
+                        pr_err("Range overlaps in high bits: %#llx..%#llx\n",
+                               range.start, range.start + range.size);
+                        continue;
+                }
+                highbits_seen[highbits] = 1;
+                if (PFN_DOWN(range.size) > maxnodemem_pfn[i]) {
+                        int max_size = maxnodemem_pfn[i];
+                        if (max_size > 0) {
+                                pr_err("Maxnodemem reduced node %d to"
+                                       " %d pages\n", i, max_size);
+                                range.size = PFN_PHYS(max_size);
+                        } else {
+                                pr_err("Maxnodemem disabled node %d\n", i);
+                                continue;
+                        }
+                }
+                if (num_physpages + PFN_DOWN(range.size) > maxmem_pfn) {
+                        int max_size = maxmem_pfn - num_physpages;
+                        if (max_size > 0) {
+                                pr_err("Maxmem reduced node %d to %d pages\n",
+                                       i, max_size);
+                                range.size = PFN_PHYS(max_size);
+                        } else {
+                                pr_err("Maxmem disabled node %d\n", i);
+                                continue;
+                        }
+                }
+                if (i >= MAX_NUMNODES) {
+                        pr_err("Too many PA nodes (#%d): %#llx...%#llx\n",
+                               i, range.size, range.size + range.start);
+                        continue;
+                }
+
+                start = range.start >> PAGE_SHIFT;
+                size = range.size >> PAGE_SHIFT;
+                end = start + size;
+
+#ifndef __tilegx__
+                if (((HV_PhysAddr)end << PAGE_SHIFT) !=
+                    (range.start + range.size)) {
+                        pr_err("PAs too high to represent: %#llx..%#llx\n",
+                               range.start, range.start + range.size);
+                        continue;
+                }
+#endif
+#ifdef CONFIG_PCI
+                /*
+                 * Blocks that overlap the pci reserved region must
+                 * have enough space to hold the maximum percpu data
+                 * region at the top of the range.  If there isn't
+                 * enough space above the reserved region, just
+                 * truncate the node.
+                 */
+                if (start <= pci_reserve_start_pfn &&
+                    end > pci_reserve_start_pfn) {
+                        unsigned int per_cpu_size =
+                                __per_cpu_end - __per_cpu_start;
+                        unsigned int percpu_pages =
+                                NR_CPUS * (PFN_UP(per_cpu_size) >> PAGE_SHIFT);
+                        if (end < pci_reserve_end_pfn + percpu_pages) {
+                                end = pci_reserve_start_pfn;
+                                pr_err("PCI mapping region reduced node %d to"
+                                       " %ld pages\n", i, end - start);
+                        }
+                }
+#endif
+
+                for (j = __pfn_to_highbits(start);
+                     j <= __pfn_to_highbits(end - 1); j++)
+                        highbits_to_node[j] = i;
+
+                node_start_pfn[i] = start;
+                node_end_pfn[i] = end;
+                node_controller[i] = range.controller;
+                num_physpages += size;
+                max_pfn = end;
+
+                /* Mark node as online */
+                node_set(i, node_online_map);
+                node_set(i, node_possible_map);
+        }
+
+#ifndef __tilegx__
+        /*
+         * For 4KB pages, mem_map "struct page" data is 1% of the size
+         * of the physical memory, so can be quite big (640 MB for
+         * four 16G zones).  These structures must be mapped in
+         * lowmem, and since we currently cap out at about 768 MB,
+         * it's impractical to try to use this much address space.
+         * For now, arbitrarily cap the amount of physical memory
+         * we're willing to use at 8 million pages (32GB of 4KB pages).
+         */
+        cap = 8 * 1024 * 1024;  /* 8 million pages */
+        if (num_physpages > cap) {
+                int num_nodes = num_online_nodes();
+                int cap_each = cap / num_nodes;
+                unsigned long dropped_pages = 0;
+                for (i = 0; i < num_nodes; ++i) {
+                        int size = node_end_pfn[i] - node_start_pfn[i];
+                        if (size > cap_each) {
+                                dropped_pages += (size - cap_each);
+                                node_end_pfn[i] = node_start_pfn[i] + cap_each;
+                        }
+                }
+                num_physpages -= dropped_pages;
+                pr_warning("Only using %ldMB memory;"
+                       " ignoring %ldMB.\n",
+                       num_physpages >> (20 - PAGE_SHIFT),
+                       dropped_pages >> (20 - PAGE_SHIFT));
+                pr_warning("Consider using a larger page size.\n");
+        }
+#endif
+
+        /* Heap starts just above the last loaded address. */
+        min_low_pfn = PFN_UP((unsigned long)_end - PAGE_OFFSET);
+
+#ifdef CONFIG_HIGHMEM
+        /* Find where we map lowmem from each controller. */
+        high_memory = setup_pa_va_mapping();
+
+        /* Set max_low_pfn based on what node 0 can directly address. */
+        max_low_pfn = node_lowmem_end_pfn[0];
+
+        lowmem_pages = (mappable_physpages > MAXMEM_PFN) ?
+                MAXMEM_PFN : mappable_physpages;
+        highmem_pages = (long) (num_physpages - lowmem_pages);
+
+        pr_notice("%ldMB HIGHMEM available.\n",
+               pages_to_mb(highmem_pages > 0 ? highmem_pages : 0));
+        pr_notice("%ldMB LOWMEM available.\n",
+                        pages_to_mb(lowmem_pages));
+#else
+        /* Set max_low_pfn based on what node 0 can directly address. */
+        max_low_pfn = node_end_pfn[0];
+
+#ifndef __tilegx__
+        if (node_end_pfn[0] > MAXMEM_PFN) {
+                pr_warning("Only using %ldMB LOWMEM.\n",
+                       MAXMEM>>20);
+                pr_warning("Use a HIGHMEM enabled kernel.\n");
+                max_low_pfn = MAXMEM_PFN;
+                max_pfn = MAXMEM_PFN;
+                num_physpages = MAXMEM_PFN;
+                node_end_pfn[0] = MAXMEM_PFN;
+        } else {
+                pr_notice("%ldMB memory available.\n",
+                       pages_to_mb(node_end_pfn[0]));
+        }
+        for (i = 1; i < MAX_NUMNODES; ++i) {
+                node_start_pfn[i] = 0;
+                node_end_pfn[i] = 0;
+        }
+        high_memory = __va(node_end_pfn[0]);
+#else
+        lowmem_pages = 0;
+        for (i = 0; i < MAX_NUMNODES; ++i) {
+                int pages = node_end_pfn[i] - node_start_pfn[i];
+                lowmem_pages += pages;
+                if (pages)
+                        high_memory = pfn_to_kaddr(node_end_pfn[i]);
+        }
+        pr_notice("%ldMB memory available.\n",
+               pages_to_mb(lowmem_pages));
+#endif
+#endif
+}
+
+static void __init setup_bootmem_allocator(void)
+{
+        unsigned long bootmap_size, first_alloc_pfn, last_alloc_pfn;
+
+        /* Provide a node 0 bdata. */
+        NODE_DATA(0)->bdata = &node0_bdata;
+
+#ifdef CONFIG_PCI
+        /* Don't let boot memory alias the PCI region. */
+        last_alloc_pfn = min(max_low_pfn, pci_reserve_start_pfn);
+#else
+        last_alloc_pfn = max_low_pfn;
+#endif
+
+        /*
+         * Initialize the boot-time allocator (with low memory only):
+         * The first argument says where to put the bitmap, and the
+         * second says where the end of allocatable memory is.
+         */
+        bootmap_size = init_bootmem(min_low_pfn, last_alloc_pfn);
+
+        /*
+         * Let the bootmem allocator use all the space we've given it
+         * except for its own bitmap.
+         */
+        first_alloc_pfn = min_low_pfn + PFN_UP(bootmap_size);
+        if (first_alloc_pfn >= last_alloc_pfn)
+                early_panic("Not enough memory on controller 0 for bootmem\n");
+
+        free_bootmem(PFN_PHYS(first_alloc_pfn),
+                     PFN_PHYS(last_alloc_pfn - first_alloc_pfn));
+
+#ifdef CONFIG_KEXEC
+        if (crashk_res.start != crashk_res.end)
+                reserve_bootmem(crashk_res.start,
+                        crashk_res.end - crashk_res.start + 1, 0);
+#endif
+
+}
+
+void *__init alloc_remap(int nid, unsigned long size)
+{
+        int pages = node_end_pfn[nid] - node_start_pfn[nid];
+        void *map = pfn_to_kaddr(node_memmap_pfn[nid]);
+        BUG_ON(size != pages * sizeof(struct page));
+        memset(map, 0, size);
+        return map;
+}
+
+static int __init percpu_size(void)
+{
+        int size = ALIGN(__per_cpu_end - __per_cpu_start, PAGE_SIZE);
+#ifdef CONFIG_MODULES
+        if (size < PERCPU_ENOUGH_ROOM)
+                size = PERCPU_ENOUGH_ROOM;
+#endif
+        /* In several places we assume the per-cpu data fits on a huge page. */
+        BUG_ON(kdata_huge && size > HPAGE_SIZE);
+        return size;
+}
+
+static inline unsigned long alloc_bootmem_pfn(int size, unsigned long goal)
+{
+        void *kva = __alloc_bootmem(size, PAGE_SIZE, goal);
+        unsigned long pfn = kaddr_to_pfn(kva);
+        BUG_ON(goal && PFN_PHYS(pfn) != goal);
+        return pfn;
+}
+
+static void __init zone_sizes_init(void)
+{
+        unsigned long zones_size[MAX_NR_ZONES] = { 0 };
+        unsigned long node_percpu[MAX_NUMNODES] = { 0 };
+        int size = percpu_size();
+        int num_cpus = smp_height * smp_width;
+        int i;
+
+        for (i = 0; i < num_cpus; ++i)
+                node_percpu[cpu_to_node(i)] += size;
+
+        for_each_online_node(i) {
+                unsigned long start = node_start_pfn[i];
+                unsigned long end = node_end_pfn[i];
+#ifdef CONFIG_HIGHMEM
+                unsigned long lowmem_end = node_lowmem_end_pfn[i];
+#else
+                unsigned long lowmem_end = end;
+#endif
+                int memmap_size = (end - start) * sizeof(struct page);
+                node_free_pfn[i] = start;
+
+                /*
+                 * Set aside pages for per-cpu data and the mem_map array.
+                 *
+                 * Since the per-cpu data requires special homecaching,
+                 * if we are in kdata_huge mode, we put it at the end of
+                 * the lowmem region.  If we're not in kdata_huge mode,
+                 * we take the per-cpu pages from the bottom of the
+                 * controller, since that avoids fragmenting a huge page
+                 * that users might want.  We always take the memmap
+                 * from the bottom of the controller, since with
+                 * kdata_huge that lets it be under a huge TLB entry.
+                 *
+                 * If the user has requested isolnodes for a controller,
+                 * though, there'll be no lowmem, so we just alloc_bootmem
+                 * the memmap.  There will be no percpu memory either.
+                 */
+                if (__pfn_to_highbits(start) == 0) {
+                        /* In low PAs, allocate via bootmem. */
+                        unsigned long goal = 0;
+                        node_memmap_pfn[i] =
+                                alloc_bootmem_pfn(memmap_size, goal);
+                        if (kdata_huge)
+                                goal = PFN_PHYS(lowmem_end) - node_percpu[i];
+                        if (node_percpu[i])
+                                node_percpu_pfn[i] =
+                                    alloc_bootmem_pfn(node_percpu[i], goal);
+                } else if (cpu_isset(i, isolnodes)) {
+                        node_memmap_pfn[i] = alloc_bootmem_pfn(memmap_size, 0);
+                        BUG_ON(node_percpu[i] != 0);
+                } else {
+                        /* In high PAs, just reserve some pages. */
+                        node_memmap_pfn[i] = node_free_pfn[i];
+                        node_free_pfn[i] += PFN_UP(memmap_size);
+                        if (!kdata_huge) {
+                                node_percpu_pfn[i] = node_free_pfn[i];
+                                node_free_pfn[i] += PFN_UP(node_percpu[i]);
+                        } else {
+                                node_percpu_pfn[i] =
+                                        lowmem_end - PFN_UP(node_percpu[i]);
+                        }
+                }
+
+#ifdef CONFIG_HIGHMEM
+                if (start > lowmem_end) {
+                        zones_size[ZONE_NORMAL] = 0;
+                        zones_size[ZONE_HIGHMEM] = end - start;
+                } else {
+                        zones_size[ZONE_NORMAL] = lowmem_end - start;
+                        zones_size[ZONE_HIGHMEM] = end - lowmem_end;
+                }
+#else
+                zones_size[ZONE_NORMAL] = end - start;
+#endif
+
+                /*
+                 * Everyone shares node 0's bootmem allocator, but
+                 * we use alloc_remap(), above, to put the actual
+                 * struct page array on the individual controllers,
+                 * which is most of the data that we actually care about.
+                 * We can't place bootmem allocators on the other
+                 * controllers since the bootmem allocator can only
+                 * operate on 32-bit physical addresses.
+                 */
+                NODE_DATA(i)->bdata = NODE_DATA(0)->bdata;
+
+                free_area_init_node(i, zones_size, start, NULL);
+                printk(KERN_DEBUG "  DMA zone: %ld per-cpu pages\n",
+                       PFN_UP(node_percpu[i]));
+
+                /* Track the type of memory on each node */
+                if (zones_size[ZONE_NORMAL])
+                        node_set_state(i, N_NORMAL_MEMORY);
+#ifdef CONFIG_HIGHMEM
+                if (end != start)
+                        node_set_state(i, N_HIGH_MEMORY);
+#endif
+
+                node_set_online(i);
+        }
+}
+
+#ifdef CONFIG_NUMA
+
+/* which logical CPUs are on which nodes */
+struct cpumask node_2_cpu_mask[MAX_NUMNODES] __write_once;
+EXPORT_SYMBOL(node_2_cpu_mask);
+
+/* which node each logical CPU is on */
+char cpu_2_node[NR_CPUS] __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+EXPORT_SYMBOL(cpu_2_node);
+
+/* Return cpu_to_node() except for cpus not yet assigned, which return -1 */
+static int __init cpu_to_bound_node(int cpu, struct cpumask* unbound_cpus)
+{
+        if (!cpu_possible(cpu) || cpumask_test_cpu(cpu, unbound_cpus))
+                return -1;
+        else
+                return cpu_to_node(cpu);
+}
+
+/* Return number of immediately-adjacent tiles sharing the same NUMA node. */
+static int __init node_neighbors(int node, int cpu,
+                                 struct cpumask *unbound_cpus)
+{
+        int neighbors = 0;
+        int w = smp_width;
+        int h = smp_height;
+        int x = cpu % w;
+        int y = cpu / w;
+        if (x > 0 && cpu_to_bound_node(cpu-1, unbound_cpus) == node)
+                ++neighbors;
+        if (x < w-1 && cpu_to_bound_node(cpu+1, unbound_cpus) == node)
+                ++neighbors;
+        if (y > 0 && cpu_to_bound_node(cpu-w, unbound_cpus) == node)
+                ++neighbors;
+        if (y < h-1 && cpu_to_bound_node(cpu+w, unbound_cpus) == node)
+                ++neighbors;
+        return neighbors;
+}
+
+static void __init setup_numa_mapping(void)
+{
+        int distance[MAX_NUMNODES][NR_CPUS];
+        HV_Coord coord;
+        int cpu, node, cpus, i, x, y;
+        int num_nodes = num_online_nodes();
+        struct cpumask unbound_cpus;
+        nodemask_t default_nodes;
+
+        cpumask_clear(&unbound_cpus);
+
+        /* Get set of nodes we will use for defaults */
+        nodes_andnot(default_nodes, node_online_map, isolnodes);
+        if (nodes_empty(default_nodes)) {
+                BUG_ON(!node_isset(0, node_online_map));
+                pr_err("Forcing NUMA node zero available as a default node\n");
+                node_set(0, default_nodes);
+        }
+
+        /* Populate the distance[] array */
+        memset(distance, -1, sizeof(distance));
+        cpu = 0;
+        for (coord.y = 0; coord.y < smp_height; ++coord.y) {
+                for (coord.x = 0; coord.x < smp_width;
+                     ++coord.x, ++cpu) {
+                        BUG_ON(cpu >= nr_cpu_ids);
+                        if (!cpu_possible(cpu)) {
+                                cpu_2_node[cpu] = -1;
+                                continue;
+                        }
+                        for_each_node_mask(node, default_nodes) {
+                                HV_MemoryControllerInfo info =
+                                        hv_inquire_memory_controller(
+                                                coord, node_controller[node]);
+                                distance[node][cpu] =
+                                        ABS(info.coord.x) + ABS(info.coord.y);
+                        }
+                        cpumask_set_cpu(cpu, &unbound_cpus);
+                }
+        }
+        cpus = cpu;
+
+        /*
+         * Round-robin through the NUMA nodes until all the cpus are
+         * assigned.  We could be more clever here (e.g. create four
+         * sorted linked lists on the same set of cpu nodes, and pull
+         * off them in round-robin sequence, removing from all four
+         * lists each time) but given the relatively small numbers
+         * involved, O(n^2) seem OK for a one-time cost.
+         */
+        node = first_node(default_nodes);
+        while (!cpumask_empty(&unbound_cpus)) {
+                int best_cpu = -1;
+                int best_distance = INT_MAX;
+                for (cpu = 0; cpu < cpus; ++cpu) {
+                        if (cpumask_test_cpu(cpu, &unbound_cpus)) {
+                                /*
+                                 * Compute metric, which is how much
+                                 * closer the cpu is to this memory
+                                 * controller than the others, shifted
+                                 * up, and then the number of
+                                 * neighbors already in the node as an
+                                 * epsilon adjustment to try to keep
+                                 * the nodes compact.
+                                 */
+                                int d = distance[node][cpu] * num_nodes;
+                                for_each_node_mask(i, default_nodes) {
+                                        if (i != node)
+                                                d -= distance[i][cpu];
+                                }
+                                d *= 8;  /* allow space for epsilon */
+                                d -= node_neighbors(node, cpu, &unbound_cpus);
+                                if (d < best_distance) {
+                                        best_cpu = cpu;
+                                        best_distance = d;
+                                }
+                        }
+                }
+                BUG_ON(best_cpu < 0);
+                cpumask_set_cpu(best_cpu, &node_2_cpu_mask[node]);
+                cpu_2_node[best_cpu] = node;
+                cpumask_clear_cpu(best_cpu, &unbound_cpus);
+                node = next_node(node, default_nodes);
+                if (node == MAX_NUMNODES)
+                        node = first_node(default_nodes);
+        }
+
+        /* Print out node assignments and set defaults for disabled cpus */
+        cpu = 0;
+        for (y = 0; y < smp_height; ++y) {
+                printk(KERN_DEBUG "NUMA cpu-to-node row %d:", y);
+                for (x = 0; x < smp_width; ++x, ++cpu) {
+                        if (cpu_to_node(cpu) < 0) {
+                                pr_cont(" -");
+                                cpu_2_node[cpu] = first_node(default_nodes);
+                        } else {
+                                pr_cont(" %d", cpu_to_node(cpu));
+                        }
+                }
+                pr_cont("\n");
+        }
+}
+
+static struct cpu cpu_devices[NR_CPUS];
+
+static int __init topology_init(void)
+{
+        int i;
+
+        for_each_online_node(i)
+                register_one_node(i);
+
+        for_each_present_cpu(i)
+                register_cpu(&cpu_devices[i], i);
+
+        return 0;
+}
+
+subsys_initcall(topology_init);
+
+#else /* !CONFIG_NUMA */
+
+#define setup_numa_mapping() do { } while (0)
+
+#endif /* CONFIG_NUMA */
+
+/**
+ * setup_cpu() - Do all necessary per-cpu, tile-specific initialization.
+ * @boot: Is this the boot cpu?
+ *
+ * Called from setup_arch() on the boot cpu, or online_secondary().
+ */
+void __cpuinit setup_cpu(int boot)
+{
+        /* The boot cpu sets up its permanent mappings much earlier. */
+        if (!boot)
+                store_permanent_mappings();
+
+        /* Allow asynchronous TLB interrupts. */
+#if CHIP_HAS_TILE_DMA()
+        raw_local_irq_unmask(INT_DMATLB_MISS);
+        raw_local_irq_unmask(INT_DMATLB_ACCESS);
+#endif
+#if CHIP_HAS_SN_PROC()
+        raw_local_irq_unmask(INT_SNITLB_MISS);
+#endif
+
+        /*
+         * Allow user access to many generic SPRs, like the cycle
+         * counter, PASS/FAIL/DONE, INTERRUPT_CRITICAL_SECTION, etc.
+         */
+        __insn_mtspr(SPR_MPL_WORLD_ACCESS_SET_0, 1);
+
+#if CHIP_HAS_SN()
+        /* Static network is not restricted. */
+        __insn_mtspr(SPR_MPL_SN_ACCESS_SET_0, 1);
+#endif
+#if CHIP_HAS_SN_PROC()
+        __insn_mtspr(SPR_MPL_SN_NOTIFY_SET_0, 1);
+        __insn_mtspr(SPR_MPL_SN_CPL_SET_0, 1);
+#endif
+
+        /*
+         * Set the MPL for interrupt control 0 to user level.
+         * This includes access to the SYSTEM_SAVE and EX_CONTEXT SPRs,
+         * as well as the PL 0 interrupt mask.
+         */
+        __insn_mtspr(SPR_MPL_INTCTRL_0_SET_0, 1);
+
+        /* Initialize IRQ support for this cpu. */
+        setup_irq_regs();
+
+#ifdef CONFIG_HARDWALL
+        /* Reset the network state on this cpu. */
+        reset_network_state();
+#endif
+}
+
+static int __initdata set_initramfs_file;
+static char __initdata initramfs_file[128] = "initramfs.cpio.gz";
+
+static int __init setup_initramfs_file(char *str)
+{
+        if (str == NULL)
+                return -EINVAL;
+        strncpy(initramfs_file, str, sizeof(initramfs_file) - 1);
+        set_initramfs_file = 1;
+
+        return 0;
+}
+early_param("initramfs_file", setup_initramfs_file);
+
+/*
+ * We look for an additional "initramfs.cpio.gz" file in the hvfs.
+ * If there is one, we allocate some memory for it and it will be
+ * unpacked to the initramfs after any built-in initramfs_data.
+ */
+static void __init load_hv_initrd(void)
+{
+        HV_FS_StatInfo stat;
+        int fd, rc;
+        void *initrd;
+
+        fd = hv_fs_findfile((HV_VirtAddr) initramfs_file);
+        if (fd == HV_ENOENT) {
+                if (set_initramfs_file)
+                        pr_warning("No such hvfs initramfs file '%s'\n",
+                                   initramfs_file);
+                return;
+        }
+        BUG_ON(fd < 0);
+        stat = hv_fs_fstat(fd);
+        BUG_ON(stat.size < 0);
+        if (stat.flags & HV_FS_ISDIR) {
+                pr_warning("Ignoring hvfs file '%s': it's a directory.\n",
+                           initramfs_file);
+                return;
+        }
+        initrd = alloc_bootmem_pages(stat.size);
+        rc = hv_fs_pread(fd, (HV_VirtAddr) initrd, stat.size, 0);
+        if (rc != stat.size) {
+                pr_err("Error reading %d bytes from hvfs file '%s': %d\n",
+                       stat.size, initramfs_file, rc);
+                free_initrd_mem((unsigned long) initrd, stat.size);
+                return;
+        }
+        initrd_start = (unsigned long) initrd;
+        initrd_end = initrd_start + stat.size;
+}
+
+void __init free_initrd_mem(unsigned long begin, unsigned long end)
+{
+        free_bootmem(__pa(begin), end - begin);
+}
+
+static void __init validate_hv(void)
+{
+        /*
+         * It may already be too late, but let's check our built-in
+         * configuration against what the hypervisor is providing.
+         */
+        unsigned long glue_size = hv_sysconf(HV_SYSCONF_GLUE_SIZE);
+        int hv_page_size = hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL);
+        int hv_hpage_size = hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE);
+        HV_ASIDRange asid_range;
+
+#ifndef CONFIG_SMP
+        HV_Topology topology = hv_inquire_topology();
+        BUG_ON(topology.coord.x != 0 || topology.coord.y != 0);
+        if (topology.width != 1 || topology.height != 1) {
+                pr_warning("Warning: booting UP kernel on %dx%d grid;"
+                           " will ignore all but first tile.\n",
+                           topology.width, topology.height);
+        }
+#endif
+
+        if (PAGE_OFFSET + HV_GLUE_START_CPA + glue_size > (unsigned long)_text)
+                early_panic("Hypervisor glue size %ld is too big!\n",
+                            glue_size);
+        if (hv_page_size != PAGE_SIZE)
+                early_panic("Hypervisor page size %#x != our %#lx\n",
+                            hv_page_size, PAGE_SIZE);
+        if (hv_hpage_size != HPAGE_SIZE)
+                early_panic("Hypervisor huge page size %#x != our %#lx\n",
+                            hv_hpage_size, HPAGE_SIZE);
+
+#ifdef CONFIG_SMP
+        /*
+         * Some hypervisor APIs take a pointer to a bitmap array
+         * whose size is at least the number of cpus on the chip.
+         * We use a struct cpumask for this, so it must be big enough.
+         */
+        if ((smp_height * smp_width) > nr_cpu_ids)
+                early_panic("Hypervisor %d x %d grid too big for Linux"
+                            " NR_CPUS %d\n", smp_height, smp_width,
+                            nr_cpu_ids);
+#endif
+
+        /*
+         * Check that we're using allowed ASIDs, and initialize the
+         * various asid variables to their appropriate initial states.
+         */
+        asid_range = hv_inquire_asid(0);
+        __get_cpu_var(current_asid) = min_asid = asid_range.start;
+        max_asid = asid_range.start + asid_range.size - 1;
+
+        if (hv_confstr(HV_CONFSTR_CHIP_MODEL, (HV_VirtAddr)chip_model,
+                       sizeof(chip_model)) < 0) {
+                pr_err("Warning: HV_CONFSTR_CHIP_MODEL not available\n");
+                strlcpy(chip_model, "unknown", sizeof(chip_model));
+        }
+}
+
+static void __init validate_va(void)
+{
+#ifndef __tilegx__   /* FIXME: GX: probably some validation relevant here */
+        /*
+         * Similarly, make sure we're only using allowed VAs.
+         * We assume we can contiguously use MEM_USER_INTRPT .. MEM_HV_INTRPT,
+         * and 0 .. KERNEL_HIGH_VADDR.
+         * In addition, make sure we CAN'T use the end of memory, since
+         * we use the last chunk of each pgd for the pgd_list.
+         */
+        int i, fc_fd_ok = 0;
+        unsigned long max_va = 0;
+        unsigned long list_va =
+                ((PGD_LIST_OFFSET / sizeof(pgd_t)) << PGDIR_SHIFT);
+
+        for (i = 0; ; ++i) {
+                HV_VirtAddrRange range = hv_inquire_virtual(i);
+                if (range.size == 0)
+                        break;
+                if (range.start <= MEM_USER_INTRPT &&
+                    range.start + range.size >= MEM_HV_INTRPT)
+                        fc_fd_ok = 1;
+                if (range.start == 0)
+                        max_va = range.size;
+                BUG_ON(range.start + range.size > list_va);
+        }
+        if (!fc_fd_ok)
+                early_panic("Hypervisor not configured for VAs 0xfc/0xfd\n");
+        if (max_va == 0)
+                early_panic("Hypervisor not configured for low VAs\n");
+        if (max_va < KERNEL_HIGH_VADDR)
+                early_panic("Hypervisor max VA %#lx smaller than %#lx\n",
+                            max_va, KERNEL_HIGH_VADDR);
+
+        /* Kernel PCs must have their high bit set; see intvec.S. */
+        if ((long)VMALLOC_START >= 0)
+                early_panic(
+                        "Linux VMALLOC region below the 2GB line (%#lx)!\n"
+                        "Reconfigure the kernel with fewer NR_HUGE_VMAPS\n"
+                        "or smaller VMALLOC_RESERVE.\n",
+                        VMALLOC_START);
+#endif
+}
+
+/*
+ * cpu_lotar_map lists all the cpus that are valid for the supervisor
+ * to cache data on at a page level, i.e. what cpus can be placed in
+ * the LOTAR field of a PTE.  It is equivalent to the set of possible
+ * cpus plus any other cpus that are willing to share their cache.
+ * It is set by hv_inquire_tiles(HV_INQ_TILES_LOTAR).
+ */
+struct cpumask __write_once cpu_lotar_map;
+EXPORT_SYMBOL(cpu_lotar_map);
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+/*
+ * hash_for_home_map lists all the tiles that hash-for-home data
+ * will be cached on.  Note that this may includes tiles that are not
+ * valid for this supervisor to use otherwise (e.g. if a hypervisor
+ * device is being shared between multiple supervisors).
+ * It is set by hv_inquire_tiles(HV_INQ_TILES_HFH_CACHE).
+ */
+struct cpumask hash_for_home_map;
+EXPORT_SYMBOL(hash_for_home_map);
+#endif
+
+/*
+ * cpu_cacheable_map lists all the cpus whose caches the hypervisor can
+ * flush on our behalf.  It is set to cpu_possible_map OR'ed with
+ * hash_for_home_map, and it is what should be passed to
+ * hv_flush_remote() to flush all caches.  Note that if there are
+ * dedicated hypervisor driver tiles that have authorized use of their
+ * cache, those tiles will only appear in cpu_lotar_map, NOT in
+ * cpu_cacheable_map, as they are a special case.
+ */
+struct cpumask __write_once cpu_cacheable_map;
+EXPORT_SYMBOL(cpu_cacheable_map);
+
+static __initdata struct cpumask disabled_map;
+
+static int __init disabled_cpus(char *str)
+{
+        int boot_cpu = smp_processor_id();
+
+        if (str == NULL || cpulist_parse_crop(str, &disabled_map) != 0)
+                return -EINVAL;
+        if (cpumask_test_cpu(boot_cpu, &disabled_map)) {
+                pr_err("disabled_cpus: can't disable boot cpu %d\n", boot_cpu);
+                cpumask_clear_cpu(boot_cpu, &disabled_map);
+        }
+        return 0;
+}
+
+early_param("disabled_cpus", disabled_cpus);
+
+void __init print_disabled_cpus(void)
+{
+        if (!cpumask_empty(&disabled_map)) {
+                char buf[100];
+                cpulist_scnprintf(buf, sizeof(buf), &disabled_map);
+                pr_info("CPUs not available for Linux: %s\n", buf);
+        }
+}
+
+static void __init setup_cpu_maps(void)
+{
+        struct cpumask hv_disabled_map, cpu_possible_init;
+        int boot_cpu = smp_processor_id();
+        int cpus, i, rc;
+
+        /* Learn which cpus are allowed by the hypervisor. */
+        rc = hv_inquire_tiles(HV_INQ_TILES_AVAIL,
+                              (HV_VirtAddr) cpumask_bits(&cpu_possible_init),
+                              sizeof(cpu_cacheable_map));
+        if (rc < 0)
+                early_panic("hv_inquire_tiles(AVAIL) failed: rc %d\n", rc);
+        if (!cpumask_test_cpu(boot_cpu, &cpu_possible_init))
+                early_panic("Boot CPU %d disabled by hypervisor!\n", boot_cpu);
+
+        /* Compute the cpus disabled by the hvconfig file. */
+        cpumask_complement(&hv_disabled_map, &cpu_possible_init);
+
+        /* Include them with the cpus disabled by "disabled_cpus". */
+        cpumask_or(&disabled_map, &disabled_map, &hv_disabled_map);
+
+        /*
+         * Disable every cpu after "setup_max_cpus".  But don't mark
+         * as disabled the cpus that are outside of our initial rectangle,
+         * since that turns out to be confusing.
+         */
+        cpus = 1;                          /* this cpu */
+        cpumask_set_cpu(boot_cpu, &disabled_map);   /* ignore this cpu */
+        for (i = 0; cpus < setup_max_cpus; ++i)
+                if (!cpumask_test_cpu(i, &disabled_map))
+                        ++cpus;
+        for (; i < smp_height * smp_width; ++i)
+                cpumask_set_cpu(i, &disabled_map);
+        cpumask_clear_cpu(boot_cpu, &disabled_map); /* reset this cpu */
+        for (i = smp_height * smp_width; i < NR_CPUS; ++i)
+                cpumask_clear_cpu(i, &disabled_map);
+
+        /*
+         * Setup cpu_possible map as every cpu allocated to us, minus
+         * the results of any "disabled_cpus" settings.
+         */
+        cpumask_andnot(&cpu_possible_init, &cpu_possible_init, &disabled_map);
+        init_cpu_possible(&cpu_possible_init);
+
+        /* Learn which cpus are valid for LOTAR caching. */
+        rc = hv_inquire_tiles(HV_INQ_TILES_LOTAR,
+                              (HV_VirtAddr) cpumask_bits(&cpu_lotar_map),
+                              sizeof(cpu_lotar_map));
+        if (rc < 0) {
+                pr_err("warning: no HV_INQ_TILES_LOTAR; using AVAIL\n");
+                cpu_lotar_map = cpu_possible_map;
+        }
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        /* Retrieve set of CPUs used for hash-for-home caching */
+        rc = hv_inquire_tiles(HV_INQ_TILES_HFH_CACHE,
+                              (HV_VirtAddr) hash_for_home_map.bits,
+                              sizeof(hash_for_home_map));
+        if (rc < 0)
+                early_panic("hv_inquire_tiles(HFH_CACHE) failed: rc %d\n", rc);
+        cpumask_or(&cpu_cacheable_map, &cpu_possible_map, &hash_for_home_map);
+#else
+        cpu_cacheable_map = cpu_possible_map;
+#endif
+}
+
+
+static int __init dataplane(char *str)
+{
+        pr_warning("WARNING: dataplane support disabled in this kernel\n");
+        return 0;
+}
+
+early_param("dataplane", dataplane);
+
+#ifdef CONFIG_CMDLINE_BOOL
+static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
+#endif
+
+void __init setup_arch(char **cmdline_p)
+{
+        int len;
+
+#if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
+        len = hv_get_command_line((HV_VirtAddr) boot_command_line,
+                                  COMMAND_LINE_SIZE);
+        if (boot_command_line[0])
+                pr_warning("WARNING: ignoring dynamic command line \"%s\"\n",
+                           boot_command_line);
+        strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+#else
+        char *hv_cmdline;
+#if defined(CONFIG_CMDLINE_BOOL)
+        if (builtin_cmdline[0]) {
+                int builtin_len = strlcpy(boot_command_line, builtin_cmdline,
+                                          COMMAND_LINE_SIZE);
+                if (builtin_len < COMMAND_LINE_SIZE-1)
+                        boot_command_line[builtin_len++] = ' ';
+                hv_cmdline = &boot_command_line[builtin_len];
+                len = COMMAND_LINE_SIZE - builtin_len;
+        } else
+#endif
+        {
+                hv_cmdline = boot_command_line;
+                len = COMMAND_LINE_SIZE;
+        }
+        len = hv_get_command_line((HV_VirtAddr) hv_cmdline, len);
+        if (len < 0 || len > COMMAND_LINE_SIZE)
+                early_panic("hv_get_command_line failed: %d\n", len);
+#endif
+
+        *cmdline_p = boot_command_line;
+
+        /* Set disabled_map and setup_max_cpus very early */
+        parse_early_param();
+
+        /* Make sure the kernel is compatible with the hypervisor. */
+        validate_hv();
+        validate_va();
+
+        setup_cpu_maps();
+
+
+#ifdef CONFIG_PCI
+        /*
+         * Initialize the PCI structures.  This is done before memory
+         * setup so that we know whether or not a pci_reserve region
+         * is necessary.
+         */
+        if (tile_pci_init() == 0)
+                pci_reserve_mb = 0;
+
+        /* PCI systems reserve a region just below 4GB for mapping iomem. */
+        pci_reserve_end_pfn  = (1 << (32 - PAGE_SHIFT));
+        pci_reserve_start_pfn = pci_reserve_end_pfn -
+                (pci_reserve_mb << (20 - PAGE_SHIFT));
+#endif
+
+        init_mm.start_code = (unsigned long) _text;
+        init_mm.end_code = (unsigned long) _etext;
+        init_mm.end_data = (unsigned long) _edata;
+        init_mm.brk = (unsigned long) _end;
+
+        setup_memory();
+        store_permanent_mappings();
+        setup_bootmem_allocator();
+
+        /*
+         * NOTE: before this point _nobody_ is allowed to allocate
+         * any memory using the bootmem allocator.
+         */
+
+        paging_init();
+        setup_numa_mapping();
+        zone_sizes_init();
+        set_page_homes();
+        setup_cpu(1);
+        setup_clock();
+        load_hv_initrd();
+}
+
+
+/*
+ * Set up per-cpu memory.
+ */
+
+unsigned long __per_cpu_offset[NR_CPUS] __write_once;
+EXPORT_SYMBOL(__per_cpu_offset);
+
+static size_t __initdata pfn_offset[MAX_NUMNODES] = { 0 };
+static unsigned long __initdata percpu_pfn[NR_CPUS] = { 0 };
+
+/*
+ * As the percpu code allocates pages, we return the pages from the
+ * end of the node for the specified cpu.
+ */
+static void *__init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
+{
+        int nid = cpu_to_node(cpu);
+        unsigned long pfn = node_percpu_pfn[nid] + pfn_offset[nid];
+
+        BUG_ON(size % PAGE_SIZE != 0);
+        pfn_offset[nid] += size / PAGE_SIZE;
+        if (percpu_pfn[cpu] == 0)
+                percpu_pfn[cpu] = pfn;
+        return pfn_to_kaddr(pfn);
+}
+
+/*
+ * Pages reserved for percpu memory are not freeable, and in any case we are
+ * on a short path to panic() in setup_per_cpu_area() at this point anyway.
+ */
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+}
+
+/*
+ * Set up vmalloc page tables using bootmem for the percpu code.
+ */
+static void __init pcpu_fc_populate_pte(unsigned long addr)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pmd_t *pmd;
+        pte_t *pte;
+
+        BUG_ON(pgd_addr_invalid(addr));
+
+        pgd = swapper_pg_dir + pgd_index(addr);
+        pud = pud_offset(pgd, addr);
+        BUG_ON(!pud_present(*pud));
+        pmd = pmd_offset(pud, addr);
+        if (pmd_present(*pmd)) {
+                BUG_ON(pmd_huge_page(*pmd));
+        } else {
+                pte = __alloc_bootmem(L2_KERNEL_PGTABLE_SIZE,
+                                      HV_PAGE_TABLE_ALIGN, 0);
+                pmd_populate_kernel(&init_mm, pmd, pte);
+        }
+}
+
+void __init setup_per_cpu_areas(void)
+{
+        struct page *pg;
+        unsigned long delta, pfn, lowmem_va;
+        unsigned long size = percpu_size();
+        char *ptr;
+        int rc, cpu, i;
+
+        rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, pcpu_fc_alloc,
+                                   pcpu_fc_free, pcpu_fc_populate_pte);
+        if (rc < 0)
+                panic("Cannot initialize percpu area (err=%d)", rc);
+
+        delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
+        for_each_possible_cpu(cpu) {
+                __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
+
+                /* finv the copy out of cache so we can change homecache */
+                ptr = pcpu_base_addr + pcpu_unit_offsets[cpu];
+                __finv_buffer(ptr, size);
+                pfn = percpu_pfn[cpu];
+
+                /* Rewrite the page tables to cache on that cpu */
+                pg = pfn_to_page(pfn);
+                for (i = 0; i < size; i += PAGE_SIZE, ++pfn, ++pg) {
+
+                        /* Update the vmalloc mapping and page home. */
+                        pte_t *ptep =
+                                virt_to_pte(NULL, (unsigned long)ptr + i);
+                        pte_t pte = *ptep;
+                        BUG_ON(pfn != pte_pfn(pte));
+                        pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_TILE_L3);
+                        pte = set_remote_cache_cpu(pte, cpu);
+                        set_pte(ptep, pte);
+
+                        /* Update the lowmem mapping for consistency. */
+                        lowmem_va = (unsigned long)pfn_to_kaddr(pfn);
+                        ptep = virt_to_pte(NULL, lowmem_va);
+                        if (pte_huge(*ptep)) {
+                                printk(KERN_DEBUG "early shatter of huge page"
+                                       " at %#lx\n", lowmem_va);
+                                shatter_pmd((pmd_t *)ptep);
+                                ptep = virt_to_pte(NULL, lowmem_va);
+                                BUG_ON(pte_huge(*ptep));
+                        }
+                        BUG_ON(pfn != pte_pfn(*ptep));
+                        set_pte(ptep, pte);
+                }
+        }
+
+        /* Set our thread pointer appropriately. */
+        set_my_cpu_offset(__per_cpu_offset[smp_processor_id()]);
+
+        /* Make sure the finv's have completed. */
+        mb_incoherent();
+
+        /* Flush the TLB so we reference it properly from here on out. */
+        local_flush_tlb_all();
+}
+
+static struct resource data_resource = {
+        .name   = "Kernel data",
+        .start  = 0,
+        .end    = 0,
+        .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource code_resource = {
+        .name   = "Kernel code",
+        .start  = 0,
+        .end    = 0,
+        .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+/*
+ * We reserve all resources above 4GB so that PCI won't try to put
+ * mappings above 4GB; the standard allows that for some devices but
+ * the probing code trunates values to 32 bits.
+ */
+#ifdef CONFIG_PCI
+static struct resource* __init
+insert_non_bus_resource(void)
+{
+        struct resource *res =
+                kzalloc(sizeof(struct resource), GFP_ATOMIC);
+        res->name = "Non-Bus Physical Address Space";
+        res->start = (1ULL << 32);
+        res->end = -1LL;
+        res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
+        if (insert_resource(&iomem_resource, res)) {
+                kfree(res);
+                return NULL;
+        }
+        return res;
+}
+#endif
+
+static struct resource* __init
+insert_ram_resource(u64 start_pfn, u64 end_pfn)
+{
+        struct resource *res =
+                kzalloc(sizeof(struct resource), GFP_ATOMIC);
+        res->name = "System RAM";
+        res->start = start_pfn << PAGE_SHIFT;
+        res->end = (end_pfn << PAGE_SHIFT) - 1;
+        res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
+        if (insert_resource(&iomem_resource, res)) {
+                kfree(res);
+                return NULL;
+        }
+        return res;
+}
+
+/*
+ * Request address space for all standard resources
+ *
+ * If the system includes PCI root complex drivers, we need to create
+ * a window just below 4GB where PCI BARs can be mapped.
+ */
+static int __init request_standard_resources(void)
+{
+        int i;
+        enum { CODE_DELTA = MEM_SV_INTRPT - PAGE_OFFSET };
+
+        iomem_resource.end = -1LL;
+#ifdef CONFIG_PCI
+        insert_non_bus_resource();
+#endif
+
+        for_each_online_node(i) {
+                u64 start_pfn = node_start_pfn[i];
+                u64 end_pfn = node_end_pfn[i];
+
+#ifdef CONFIG_PCI
+                if (start_pfn <= pci_reserve_start_pfn &&
+                    end_pfn > pci_reserve_start_pfn) {
+                        if (end_pfn > pci_reserve_end_pfn)
+                                insert_ram_resource(pci_reserve_end_pfn,
+                                                     end_pfn);
+                        end_pfn = pci_reserve_start_pfn;
+                }
+#endif
+                insert_ram_resource(start_pfn, end_pfn);
+        }
+
+        code_resource.start = __pa(_text - CODE_DELTA);
+        code_resource.end = __pa(_etext - CODE_DELTA)-1;
+        data_resource.start = __pa(_sdata);
+        data_resource.end = __pa(_end)-1;
+
+        insert_resource(&iomem_resource, &code_resource);
+        insert_resource(&iomem_resource, &data_resource);
+
+#ifdef CONFIG_KEXEC
+        insert_resource(&iomem_resource, &crashk_res);
+#endif
+
+        return 0;
+}
+
+subsys_initcall(request_standard_resources);
diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
new file mode 100644
index 000000000000..45b66a3c991f
--- /dev/null
+++ b/arch/tile/kernel/signal.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (C) 1991, 1992  Linus Torvalds
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/suspend.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/compat.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+#include <asm/processor.h>
+#include <asm/ucontext.h>
+#include <asm/sigframe.h>
+#include <asm/syscalls.h>
+#include <arch/interrupts.h>
+
+#define DEBUG_SIG 0
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+
+long _sys_sigaltstack(const stack_t __user *uss,
+                      stack_t __user *uoss, struct pt_regs *regs)
+{
+        return do_sigaltstack(uss, uoss, regs->sp);
+}
+
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+
+int restore_sigcontext(struct pt_regs *regs,
+                       struct sigcontext __user *sc, long *pr0)
+{
+        int err = 0;
+        int i;
+
+        /* Always make any pending restarted system calls return -EINTR */
+        current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+        for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
+                err |= __get_user(((long *)regs)[i],
+                                  &((long __user *)(&sc->regs))[i]);
+
+        regs->faultnum = INT_SWINT_1_SIGRETURN;
+
+        err |= __get_user(*pr0, &sc->regs.regs[0]);
+        return err;
+}
+
+/* sigreturn() returns long since it restores r0 in the interrupted code. */
+long _sys_rt_sigreturn(struct pt_regs *regs)
+{
+        struct rt_sigframe __user *frame =
+                (struct rt_sigframe __user *)(regs->sp);
+        sigset_t set;
+        long r0;
+
+        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+                goto badframe;
+        if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+                goto badframe;
+
+        sigdelsetmask(&set, ~_BLOCKABLE);
+        spin_lock_irq(&current->sighand->siglock);
+        current->blocked = set;
+        recalc_sigpending();
+        spin_unlock_irq(&current->sighand->siglock);
+
+        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
+                goto badframe;
+
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+                goto badframe;
+
+        return r0;
+
+badframe:
+        force_sig(SIGSEGV, current);
+        return 0;
+}
+
+/*
+ * Set up a signal frame.
+ */
+
+int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
+{
+        int i, err = 0;
+
+        for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
+                err |= __put_user(((long *)regs)[i],
+                                  &((long __user *)(&sc->regs))[i]);
+
+        return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void __user *get_sigframe(struct k_sigaction *ka,
+                                        struct pt_regs *regs,
+                                        size_t frame_size)
+{
+        unsigned long sp;
+
+        /* Default to using normal stack */
+        sp = regs->sp;
+
+        /*
+         * If we are on the alternate signal stack and would overflow
+         * it, don't.  Return an always-bogus address instead so we
+         * will die with SIGSEGV.
+         */
+        if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
+                return (void __user __force *)-1UL;
+
+        /* This is the X/Open sanctioned signal stack switching.  */
+        if (ka->sa.sa_flags & SA_ONSTACK) {
+                if (sas_ss_flags(sp) == 0)
+                        sp = current->sas_ss_sp + current->sas_ss_size;
+        }
+
+        sp -= frame_size;
+        /*
+         * Align the stack pointer according to the TILE ABI,
+         * i.e. so that on function entry (sp & 15) == 0.
+         */
+        sp &= -16UL;
+        return (void __user *) sp;
+}
+
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+                           sigset_t *set, struct pt_regs *regs)
+{
+        unsigned long restorer;
+        struct rt_sigframe __user *frame;
+        int err = 0;
+        int usig;
+
+        frame = get_sigframe(ka, regs, sizeof(*frame));
+
+        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+                goto give_sigsegv;
+
+        usig = current_thread_info()->exec_domain
+                && current_thread_info()->exec_domain->signal_invmap
+                && sig < 32
+                ? current_thread_info()->exec_domain->signal_invmap[sig]
+                : sig;
+
+        /* Always write at least the signal number for the stack backtracer. */
+        if (ka->sa.sa_flags & SA_SIGINFO) {
+                /* At sigreturn time, restore the callee-save registers too. */
+                err |= copy_siginfo_to_user(&frame->info, info);
+                regs->flags |= PT_FLAGS_RESTORE_REGS;
+        } else {
+                err |= __put_user(info->si_signo, &frame->info.si_signo);
+        }
+
+        /* Create the ucontext.  */
+        err |= __clear_user(&frame->save_area, sizeof(frame->save_area));
+        err |= __put_user(0, &frame->uc.uc_flags);
+        err |= __put_user(NULL, &frame->uc.uc_link);
+        err |= __put_user((void __user *)(current->sas_ss_sp),
+                          &frame->uc.uc_stack.ss_sp);
+        err |= __put_user(sas_ss_flags(regs->sp),
+                          &frame->uc.uc_stack.ss_flags);
+        err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+        err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
+        err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+        if (err)
+                goto give_sigsegv;
+
+        restorer = VDSO_BASE;
+        if (ka->sa.sa_flags & SA_RESTORER)
+                restorer = (unsigned long) ka->sa.sa_restorer;
+
+        /*
+         * Set up registers for signal handler.
+         * Registers that we don't modify keep the value they had from
+         * user-space at the time we took the signal.
+         */
+        regs->pc = (unsigned long) ka->sa.sa_handler;
+        regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */
+        regs->sp = (unsigned long) frame;
+        regs->lr = restorer;
+        regs->regs[0] = (unsigned long) usig;
+
+        if (ka->sa.sa_flags & SA_SIGINFO) {
+                /* Need extra arguments, so mark to restore caller-saves. */
+                regs->regs[1] = (unsigned long) &frame->info;
+                regs->regs[2] = (unsigned long) &frame->uc;
+                regs->flags |= PT_FLAGS_CALLER_SAVES;
+        }
+
+        /*
+         * Notify any tracer that was single-stepping it.
+         * The tracer may want to single-step inside the
+         * handler too.
+         */
+        if (test_thread_flag(TIF_SINGLESTEP))
+                ptrace_notify(SIGTRAP);
+
+        return 0;
+
+give_sigsegv:
+        force_sigsegv(sig, current);
+        return -EFAULT;
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+
+static int handle_signal(unsigned long sig, siginfo_t *info,
+                         struct k_sigaction *ka, sigset_t *oldset,
+                         struct pt_regs *regs)
+{
+        int ret;
+
+
+        /* Are we from a system call? */
+        if (regs->faultnum == INT_SWINT_1) {
+                /* If so, check system call restarting.. */
+                switch (regs->regs[0]) {
+                case -ERESTART_RESTARTBLOCK:
+                case -ERESTARTNOHAND:
+                        regs->regs[0] = -EINTR;
+                        break;
+
+                case -ERESTARTSYS:
+                        if (!(ka->sa.sa_flags & SA_RESTART)) {
+                                regs->regs[0] = -EINTR;
+                                break;
+                        }
+                        /* fallthrough */
+                case -ERESTARTNOINTR:
+                        /* Reload caller-saves to restore r0..r5 and r10. */
+                        regs->flags |= PT_FLAGS_CALLER_SAVES;
+                        regs->regs[0] = regs->orig_r0;
+                        regs->pc -= 8;
+                }
+        }
+
+        /* Set up the stack frame */
+#ifdef CONFIG_COMPAT
+        if (is_compat_task())
+                ret = compat_setup_rt_frame(sig, ka, info, oldset, regs);
+        else
+#endif
+                ret = setup_rt_frame(sig, ka, info, oldset, regs);
+        if (ret == 0) {
+                /* This code is only called from system calls or from
+                 * the work_pending path in the return-to-user code, and
+                 * either way we can re-enable interrupts unconditionally.
+                 */
+                spin_lock_irq(&current->sighand->siglock);
+                sigorsets(&current->blocked,
+                          &current->blocked, &ka->sa.sa_mask);
+                if (!(ka->sa.sa_flags & SA_NODEFER))
+                        sigaddset(&current->blocked, sig);
+                recalc_sigpending();
+                spin_unlock_irq(&current->sighand->siglock);
+        }
+
+        return ret;
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ */
+void do_signal(struct pt_regs *regs)
+{
+        siginfo_t info;
+        int signr;
+        struct k_sigaction ka;
+        sigset_t *oldset;
+
+        /*
+         * i386 will check if we're coming from kernel mode and bail out
+         * here.  In my experience this just turns weird crashes into
+         * weird spin-hangs.  But if we find a case where this seems
+         * helpful, we can reinstate the check on "!user_mode(regs)".
+         */
+
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK)
+                oldset = &current->saved_sigmask;
+        else
+                oldset = &current->blocked;
+
+        signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+        if (signr > 0) {
+                /* Whee! Actually deliver the signal.  */
+                if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+                        /*
+                         * A signal was successfully delivered; the saved
+                         * sigmask will have been stored in the signal frame,
+                         * and will be restored by sigreturn, so we can simply
+                         * clear the TS_RESTORE_SIGMASK flag.
+                         */
+                        current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+                }
+
+                return;
+        }
+
+        /* Did we come from a system call? */
+        if (regs->faultnum == INT_SWINT_1) {
+                /* Restart the system call - no handlers present */
+                switch (regs->regs[0]) {
+                case -ERESTARTNOHAND:
+                case -ERESTARTSYS:
+                case -ERESTARTNOINTR:
+                        regs->flags |= PT_FLAGS_CALLER_SAVES;
+                        regs->regs[0] = regs->orig_r0;
+                        regs->pc -= 8;
+                        break;
+
+                case -ERESTART_RESTARTBLOCK:
+                        regs->flags |= PT_FLAGS_CALLER_SAVES;
+                        regs->regs[TREG_SYSCALL_NR] = __NR_restart_syscall;
+                        regs->pc -= 8;
+                        break;
+                }
+        }
+
+        /* If there's no signal to deliver, just put the saved sigmask back. */
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+                current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+                sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+        }
+}
diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c
new file mode 100644
index 000000000000..5ec4b9c651f2
--- /dev/null
+++ b/arch/tile/kernel/single_step.c
@@ -0,0 +1,663 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * A code-rewriter that enables instruction single-stepping.
+ * Derived from iLib's single-stepping code.
+ */
+
+#ifndef __tilegx__   /* No support for single-step yet. */
+
+/* These functions are only used on the TILE platform */
+#include <linux/slab.h>
+#include <linux/thread_info.h>
+#include <linux/uaccess.h>
+#include <linux/mman.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <asm/cacheflush.h>
+#include <asm/opcode-tile.h>
+#include <asm/opcode_constants.h>
+#include <arch/abi.h>
+
+#define signExtend17(val) sign_extend((val), 17)
+#define TILE_X1_MASK (0xffffffffULL << 31)
+
+int unaligned_printk;
+
+static int __init setup_unaligned_printk(char *str)
+{
+        long val;
+        if (strict_strtol(str, 0, &val) != 0)
+                return 0;
+        unaligned_printk = val;
+        pr_info("Printk for each unaligned data accesses is %s\n",
+                unaligned_printk ? "enabled" : "disabled");
+        return 1;
+}
+__setup("unaligned_printk=", setup_unaligned_printk);
+
+unsigned int unaligned_fixup_count;
+
+enum mem_op {
+        MEMOP_NONE,
+        MEMOP_LOAD,
+        MEMOP_STORE,
+        MEMOP_LOAD_POSTINCR,
+        MEMOP_STORE_POSTINCR
+};
+
+static inline tile_bundle_bits set_BrOff_X1(tile_bundle_bits n, int32_t offset)
+{
+        tile_bundle_bits result;
+
+        /* mask out the old offset */
+        tile_bundle_bits mask = create_BrOff_X1(-1);
+        result = n & (~mask);
+
+        /* or in the new offset */
+        result |= create_BrOff_X1(offset);
+
+        return result;
+}
+
+static inline tile_bundle_bits move_X1(tile_bundle_bits n, int dest, int src)
+{
+        tile_bundle_bits result;
+        tile_bundle_bits op;
+
+        result = n & (~TILE_X1_MASK);
+
+        op = create_Opcode_X1(SPECIAL_0_OPCODE_X1) |
+                create_RRROpcodeExtension_X1(OR_SPECIAL_0_OPCODE_X1) |
+                create_Dest_X1(dest) |
+                create_SrcB_X1(TREG_ZERO) |
+                create_SrcA_X1(src) ;
+
+        result |= op;
+        return result;
+}
+
+static inline tile_bundle_bits nop_X1(tile_bundle_bits n)
+{
+        return move_X1(n, TREG_ZERO, TREG_ZERO);
+}
+
+static inline tile_bundle_bits addi_X1(
+        tile_bundle_bits n, int dest, int src, int imm)
+{
+        n &= ~TILE_X1_MASK;
+
+        n |=  (create_SrcA_X1(src) |
+               create_Dest_X1(dest) |
+               create_Imm8_X1(imm) |
+               create_S_X1(0) |
+               create_Opcode_X1(IMM_0_OPCODE_X1) |
+               create_ImmOpcodeExtension_X1(ADDI_IMM_0_OPCODE_X1));
+
+        return n;
+}
+
+static tile_bundle_bits rewrite_load_store_unaligned(
+        struct single_step_state *state,
+        tile_bundle_bits bundle,
+        struct pt_regs *regs,
+        enum mem_op mem_op,
+        int size, int sign_ext)
+{
+        unsigned char __user *addr;
+        int val_reg, addr_reg, err, val;
+
+        /* Get address and value registers */
+        if (bundle & TILE_BUNDLE_Y_ENCODING_MASK) {
+                addr_reg = get_SrcA_Y2(bundle);
+                val_reg = get_SrcBDest_Y2(bundle);
+        } else if (mem_op == MEMOP_LOAD || mem_op == MEMOP_LOAD_POSTINCR) {
+                addr_reg = get_SrcA_X1(bundle);
+                val_reg  = get_Dest_X1(bundle);
+        } else {
+                addr_reg = get_SrcA_X1(bundle);
+                val_reg  = get_SrcB_X1(bundle);
+        }
+
+        /*
+         * If registers are not GPRs, don't try to handle it.
+         *
+         * FIXME: we could handle non-GPR loads by getting the real value
+         * from memory, writing it to the single step buffer, using a
+         * temp_reg to hold a pointer to that memory, then executing that
+         * instruction and resetting temp_reg.  For non-GPR stores, it's a
+         * little trickier; we could use the single step buffer for that
+         * too, but we'd have to add some more state bits so that we could
+         * call back in here to copy that value to the real target.  For
+         * now, we just handle the simple case.
+         */
+        if ((val_reg >= PTREGS_NR_GPRS &&
+             (val_reg != TREG_ZERO ||
+              mem_op == MEMOP_LOAD ||
+              mem_op == MEMOP_LOAD_POSTINCR)) ||
+            addr_reg >= PTREGS_NR_GPRS)
+                return bundle;
+
+        /* If it's aligned, don't handle it specially */
+        addr = (void __user *)regs->regs[addr_reg];
+        if (((unsigned long)addr % size) == 0)
+                return bundle;
+
+#ifndef __LITTLE_ENDIAN
+# error We assume little-endian representation with copy_xx_user size 2 here
+#endif
+        /* Handle unaligned load/store */
+        if (mem_op == MEMOP_LOAD || mem_op == MEMOP_LOAD_POSTINCR) {
+                unsigned short val_16;
+                switch (size) {
+                case 2:
+                        err = copy_from_user(&val_16, addr, sizeof(val_16));
+                        val = sign_ext ? ((short)val_16) : val_16;
+                        break;
+                case 4:
+                        err = copy_from_user(&val, addr, sizeof(val));
+                        break;
+                default:
+                        BUG();
+                }
+                if (err == 0) {
+                        state->update_reg = val_reg;
+                        state->update_value = val;
+                        state->update = 1;
+                }
+        } else {
+                val = (val_reg == TREG_ZERO) ? 0 : regs->regs[val_reg];
+                err = copy_to_user(addr, &val, size);
+        }
+
+        if (err) {
+                siginfo_t info = {
+                        .si_signo = SIGSEGV,
+                        .si_code = SEGV_MAPERR,
+                        .si_addr = addr
+                };
+                force_sig_info(info.si_signo, &info, current);
+                return (tile_bundle_bits) 0;
+        }
+
+        if (unaligned_fixup == 0) {
+                siginfo_t info = {
+                        .si_signo = SIGBUS,
+                        .si_code = BUS_ADRALN,
+                        .si_addr = addr
+                };
+                force_sig_info(info.si_signo, &info, current);
+                return (tile_bundle_bits) 0;
+        }
+
+        if (unaligned_printk || unaligned_fixup_count == 0) {
+                pr_info("Process %d/%s: PC %#lx: Fixup of"
+                        " unaligned %s at %#lx.\n",
+                        current->pid, current->comm, regs->pc,
+                        (mem_op == MEMOP_LOAD ||
+                         mem_op == MEMOP_LOAD_POSTINCR) ?
+                        "load" : "store",
+                        (unsigned long)addr);
+                if (!unaligned_printk) {
+#define P pr_info
+P("\n");
+P("Unaligned fixups in the kernel will slow your application considerably.\n");
+P("To find them, write a \"1\" to /proc/sys/tile/unaligned_fixup/printk,\n");
+P("which requests the kernel show all unaligned fixups, or write a \"0\"\n");
+P("to /proc/sys/tile/unaligned_fixup/enabled, in which case each unaligned\n");
+P("access will become a SIGBUS you can debug. No further warnings will be\n");
+P("shown so as to avoid additional slowdown, but you can track the number\n");
+P("of fixups performed via /proc/sys/tile/unaligned_fixup/count.\n");
+P("Use the tile-addr2line command (see \"info addr2line\") to decode PCs.\n");
+P("\n");
+#undef P
+                }
+        }
+        ++unaligned_fixup_count;
+
+        if (bundle & TILE_BUNDLE_Y_ENCODING_MASK) {
+                /* Convert the Y2 instruction to a prefetch. */
+                bundle &= ~(create_SrcBDest_Y2(-1) |
+                            create_Opcode_Y2(-1));
+                bundle |= (create_SrcBDest_Y2(TREG_ZERO) |
+                           create_Opcode_Y2(LW_OPCODE_Y2));
+        /* Replace the load postincr with an addi */
+        } else if (mem_op == MEMOP_LOAD_POSTINCR) {
+                bundle = addi_X1(bundle, addr_reg, addr_reg,
+                                 get_Imm8_X1(bundle));
+        /* Replace the store postincr with an addi */
+        } else if (mem_op == MEMOP_STORE_POSTINCR) {
+                bundle = addi_X1(bundle, addr_reg, addr_reg,
+                                 get_Dest_Imm8_X1(bundle));
+        } else {
+                /* Convert the X1 instruction to a nop. */
+                bundle &= ~(create_Opcode_X1(-1) |
+                            create_UnShOpcodeExtension_X1(-1) |
+                            create_UnOpcodeExtension_X1(-1));
+                bundle |= (create_Opcode_X1(SHUN_0_OPCODE_X1) |
+                           create_UnShOpcodeExtension_X1(
+                                   UN_0_SHUN_0_OPCODE_X1) |
+                           create_UnOpcodeExtension_X1(
+                                   NOP_UN_0_SHUN_0_OPCODE_X1));
+        }
+
+        return bundle;
+}
+
+/**
+ * single_step_once() - entry point when single stepping has been triggered.
+ * @regs: The machine register state
+ *
+ *  When we arrive at this routine via a trampoline, the single step
+ *  engine copies the executing bundle to the single step buffer.
+ *  If the instruction is a condition branch, then the target is
+ *  reset to one past the next instruction. If the instruction
+ *  sets the lr, then that is noted. If the instruction is a jump
+ *  or call, then the new target pc is preserved and the current
+ *  bundle instruction set to null.
+ *
+ *  The necessary post-single-step rewriting information is stored in
+ *  single_step_state->  We use data segment values because the
+ *  stack will be rewound when we run the rewritten single-stepped
+ *  instruction.
+ */
+void single_step_once(struct pt_regs *regs)
+{
+        extern tile_bundle_bits __single_step_ill_insn;
+        extern tile_bundle_bits __single_step_j_insn;
+        extern tile_bundle_bits __single_step_addli_insn;
+        extern tile_bundle_bits __single_step_auli_insn;
+        struct thread_info *info = (void *)current_thread_info();
+        struct single_step_state *state = info->step_state;
+        int is_single_step = test_ti_thread_flag(info, TIF_SINGLESTEP);
+        tile_bundle_bits __user *buffer, *pc;
+        tile_bundle_bits bundle;
+        int temp_reg;
+        int target_reg = TREG_LR;
+        int err;
+        enum mem_op mem_op = MEMOP_NONE;
+        int size = 0, sign_ext = 0;  /* happy compiler */
+
+        asm(
+"    .pushsection .rodata.single_step\n"
+"    .align 8\n"
+"    .globl    __single_step_ill_insn\n"
+"__single_step_ill_insn:\n"
+"    ill\n"
+"    .globl    __single_step_addli_insn\n"
+"__single_step_addli_insn:\n"
+"    { nop; addli r0, zero, 0 }\n"
+"    .globl    __single_step_auli_insn\n"
+"__single_step_auli_insn:\n"
+"    { nop; auli r0, r0, 0 }\n"
+"    .globl    __single_step_j_insn\n"
+"__single_step_j_insn:\n"
+"    j .\n"
+"    .popsection\n"
+        );
+
+        if (state == NULL) {
+                /* allocate a page of writable, executable memory */
+                state = kmalloc(sizeof(struct single_step_state), GFP_KERNEL);
+                if (state == NULL) {
+                        pr_err("Out of kernel memory trying to single-step\n");
+                        return;
+                }
+
+                /* allocate a cache line of writable, executable memory */
+                down_write(&current->mm->mmap_sem);
+                buffer = (void __user *) do_mmap(NULL, 0, 64,
+                                          PROT_EXEC | PROT_READ | PROT_WRITE,
+                                          MAP_PRIVATE | MAP_ANONYMOUS,
+                                          0);
+                up_write(&current->mm->mmap_sem);
+
+                if (IS_ERR((void __force *)buffer)) {
+                        kfree(state);
+                        pr_err("Out of kernel pages trying to single-step\n");
+                        return;
+                }
+
+                state->buffer = buffer;
+                state->is_enabled = 0;
+
+                info->step_state = state;
+
+                /* Validate our stored instruction patterns */
+                BUG_ON(get_Opcode_X1(__single_step_addli_insn) !=
+                       ADDLI_OPCODE_X1);
+                BUG_ON(get_Opcode_X1(__single_step_auli_insn) !=
+                       AULI_OPCODE_X1);
+                BUG_ON(get_SrcA_X1(__single_step_addli_insn) != TREG_ZERO);
+                BUG_ON(get_Dest_X1(__single_step_addli_insn) != 0);
+                BUG_ON(get_JOffLong_X1(__single_step_j_insn) != 0);
+        }
+
+        /*
+         * If we are returning from a syscall, we still haven't hit the
+         * "ill" for the swint1 instruction.  So back the PC up to be
+         * pointing at the swint1, but we'll actually return directly
+         * back to the "ill" so we come back in via SIGILL as if we
+         * had "executed" the swint1 without ever being in kernel space.
+         */
+        if (regs->faultnum == INT_SWINT_1)
+                regs->pc -= 8;
+
+        pc = (tile_bundle_bits __user *)(regs->pc);
+        if (get_user(bundle, pc) != 0) {
+                pr_err("Couldn't read instruction at %p trying to step\n", pc);
+                return;
+        }
+
+        /* We'll follow the instruction with 2 ill op bundles */
+        state->orig_pc = (unsigned long)pc;
+        state->next_pc = (unsigned long)(pc + 1);
+        state->branch_next_pc = 0;
+        state->update = 0;
+
+        if (!(bundle & TILE_BUNDLE_Y_ENCODING_MASK)) {
+                /* two wide, check for control flow */
+                int opcode = get_Opcode_X1(bundle);
+
+                switch (opcode) {
+                /* branches */
+                case BRANCH_OPCODE_X1:
+                {
+                        int32_t offset = signExtend17(get_BrOff_X1(bundle));
+
+                        /*
+                         * For branches, we use a rewriting trick to let the
+                         * hardware evaluate whether the branch is taken or
+                         * untaken.  We record the target offset and then
+                         * rewrite the branch instruction to target 1 insn
+                         * ahead if the branch is taken.  We then follow the
+                         * rewritten branch with two bundles, each containing
+                         * an "ill" instruction. The supervisor examines the
+                         * pc after the single step code is executed, and if
+                         * the pc is the first ill instruction, then the
+                         * branch (if any) was not taken.  If the pc is the
+                         * second ill instruction, then the branch was
+                         * taken. The new pc is computed for these cases, and
+                         * inserted into the registers for the thread.  If
+                         * the pc is the start of the single step code, then
+                         * an exception or interrupt was taken before the
+                         * code started processing, and the same "original"
+                         * pc is restored.  This change, different from the
+                         * original implementation, has the advantage of
+                         * executing a single user instruction.
+                         */
+                        state->branch_next_pc = (unsigned long)(pc + offset);
+
+                        /* rewrite branch offset to go forward one bundle */
+                        bundle = set_BrOff_X1(bundle, 2);
+                }
+                break;
+
+                /* jumps */
+                case JALB_OPCODE_X1:
+                case JALF_OPCODE_X1:
+                        state->update = 1;
+                        state->next_pc =
+                                (unsigned long) (pc + get_JOffLong_X1(bundle));
+                        break;
+
+                case JB_OPCODE_X1:
+                case JF_OPCODE_X1:
+                        state->next_pc =
+                                (unsigned long) (pc + get_JOffLong_X1(bundle));
+                        bundle = nop_X1(bundle);
+                        break;
+
+                case SPECIAL_0_OPCODE_X1:
+                        switch (get_RRROpcodeExtension_X1(bundle)) {
+                        /* jump-register */
+                        case JALRP_SPECIAL_0_OPCODE_X1:
+                        case JALR_SPECIAL_0_OPCODE_X1:
+                                state->update = 1;
+                                state->next_pc =
+                                        regs->regs[get_SrcA_X1(bundle)];
+                                break;
+
+                        case JRP_SPECIAL_0_OPCODE_X1:
+                        case JR_SPECIAL_0_OPCODE_X1:
+                                state->next_pc =
+                                        regs->regs[get_SrcA_X1(bundle)];
+                                bundle = nop_X1(bundle);
+                                break;
+
+                        case LNK_SPECIAL_0_OPCODE_X1:
+                                state->update = 1;
+                                target_reg = get_Dest_X1(bundle);
+                                break;
+
+                        /* stores */
+                        case SH_SPECIAL_0_OPCODE_X1:
+                                mem_op = MEMOP_STORE;
+                                size = 2;
+                                break;
+
+                        case SW_SPECIAL_0_OPCODE_X1:
+                                mem_op = MEMOP_STORE;
+                                size = 4;
+                                break;
+                        }
+                        break;
+
+                /* loads and iret */
+                case SHUN_0_OPCODE_X1:
+                        if (get_UnShOpcodeExtension_X1(bundle) ==
+                            UN_0_SHUN_0_OPCODE_X1) {
+                                switch (get_UnOpcodeExtension_X1(bundle)) {
+                                case LH_UN_0_SHUN_0_OPCODE_X1:
+                                        mem_op = MEMOP_LOAD;
+                                        size = 2;
+                                        sign_ext = 1;
+                                        break;
+
+                                case LH_U_UN_0_SHUN_0_OPCODE_X1:
+                                        mem_op = MEMOP_LOAD;
+                                        size = 2;
+                                        sign_ext = 0;
+                                        break;
+
+                                case LW_UN_0_SHUN_0_OPCODE_X1:
+                                        mem_op = MEMOP_LOAD;
+                                        size = 4;
+                                        break;
+
+                                case IRET_UN_0_SHUN_0_OPCODE_X1:
+                                {
+                                        unsigned long ex0_0 = __insn_mfspr(
+                                                SPR_EX_CONTEXT_0_0);
+                                        unsigned long ex0_1 = __insn_mfspr(
+                                                SPR_EX_CONTEXT_0_1);
+                                        /*
+                                         * Special-case it if we're iret'ing
+                                         * to PL0 again.  Otherwise just let
+                                         * it run and it will generate SIGILL.
+                                         */
+                                        if (EX1_PL(ex0_1) == USER_PL) {
+                                                state->next_pc = ex0_0;
+                                                regs->ex1 = ex0_1;
+                                                bundle = nop_X1(bundle);
+                                        }
+                                }
+                                }
+                        }
+                        break;
+
+#if CHIP_HAS_WH64()
+                /* postincrement operations */
+                case IMM_0_OPCODE_X1:
+                        switch (get_ImmOpcodeExtension_X1(bundle)) {
+                        case LWADD_IMM_0_OPCODE_X1:
+                                mem_op = MEMOP_LOAD_POSTINCR;
+                                size = 4;
+                                break;
+
+                        case LHADD_IMM_0_OPCODE_X1:
+                                mem_op = MEMOP_LOAD_POSTINCR;
+                                size = 2;
+                                sign_ext = 1;
+                                break;
+
+                        case LHADD_U_IMM_0_OPCODE_X1:
+                                mem_op = MEMOP_LOAD_POSTINCR;
+                                size = 2;
+                                sign_ext = 0;
+                                break;
+
+                        case SWADD_IMM_0_OPCODE_X1:
+                                mem_op = MEMOP_STORE_POSTINCR;
+                                size = 4;
+                                break;
+
+                        case SHADD_IMM_0_OPCODE_X1:
+                                mem_op = MEMOP_STORE_POSTINCR;
+                                size = 2;
+                                break;
+
+                        default:
+                                break;
+                        }
+                        break;
+#endif /* CHIP_HAS_WH64() */
+                }
+
+                if (state->update) {
+                        /*
+                         * Get an available register.  We start with a
+                         * bitmask with 1's for available registers.
+                         * We truncate to the low 32 registers since
+                         * we are guaranteed to have set bits in the
+                         * low 32 bits, then use ctz to pick the first.
+                         */
+                        u32 mask = (u32) ~((1ULL << get_Dest_X0(bundle)) |
+                                           (1ULL << get_SrcA_X0(bundle)) |
+                                           (1ULL << get_SrcB_X0(bundle)) |
+                                           (1ULL << target_reg));
+                        temp_reg = __builtin_ctz(mask);
+                        state->update_reg = temp_reg;
+                        state->update_value = regs->regs[temp_reg];
+                        regs->regs[temp_reg] = (unsigned long) (pc+1);
+                        regs->flags |= PT_FLAGS_RESTORE_REGS;
+                        bundle = move_X1(bundle, target_reg, temp_reg);
+                }
+        } else {
+                int opcode = get_Opcode_Y2(bundle);
+
+                switch (opcode) {
+                /* loads */
+                case LH_OPCODE_Y2:
+                        mem_op = MEMOP_LOAD;
+                        size = 2;
+                        sign_ext = 1;
+                        break;
+
+                case LH_U_OPCODE_Y2:
+                        mem_op = MEMOP_LOAD;
+                        size = 2;
+                        sign_ext = 0;
+                        break;
+
+                case LW_OPCODE_Y2:
+                        mem_op = MEMOP_LOAD;
+                        size = 4;
+                        break;
+
+                /* stores */
+                case SH_OPCODE_Y2:
+                        mem_op = MEMOP_STORE;
+                        size = 2;
+                        break;
+
+                case SW_OPCODE_Y2:
+                        mem_op = MEMOP_STORE;
+                        size = 4;
+                        break;
+                }
+        }
+
+        /*
+         * Check if we need to rewrite an unaligned load/store.
+         * Returning zero is a special value meaning we need to SIGSEGV.
+         */
+        if (mem_op != MEMOP_NONE && unaligned_fixup >= 0) {
+                bundle = rewrite_load_store_unaligned(state, bundle, regs,
+                                                      mem_op, size, sign_ext);
+                if (bundle == 0)
+                        return;
+        }
+
+        /* write the bundle to our execution area */
+        buffer = state->buffer;
+        err = __put_user(bundle, buffer++);
+
+        /*
+         * If we're really single-stepping, we take an INT_ILL after.
+         * If we're just handling an unaligned access, we can just
+         * jump directly back to where we were in user code.
+         */
+        if (is_single_step) {
+                err |= __put_user(__single_step_ill_insn, buffer++);
+                err |= __put_user(__single_step_ill_insn, buffer++);
+        } else {
+                long delta;
+
+                if (state->update) {
+                        /* We have some state to update; do it inline */
+                        int ha16;
+                        bundle = __single_step_addli_insn;
+                        bundle |= create_Dest_X1(state->update_reg);
+                        bundle |= create_Imm16_X1(state->update_value);
+                        err |= __put_user(bundle, buffer++);
+                        bundle = __single_step_auli_insn;
+                        bundle |= create_Dest_X1(state->update_reg);
+                        bundle |= create_SrcA_X1(state->update_reg);
+                        ha16 = (state->update_value + 0x8000) >> 16;
+                        bundle |= create_Imm16_X1(ha16);
+                        err |= __put_user(bundle, buffer++);
+                        state->update = 0;
+                }
+
+                /* End with a jump back to the next instruction */
+                delta = ((regs->pc + TILE_BUNDLE_SIZE_IN_BYTES) -
+                        (unsigned long)buffer) >>
+                        TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES;
+                bundle = __single_step_j_insn;
+                bundle |= create_JOffLong_X1(delta);
+                err |= __put_user(bundle, buffer++);
+        }
+
+        if (err) {
+                pr_err("Fault when writing to single-step buffer\n");
+                return;
+        }
+
+        /*
+         * Flush the buffer.
+         * We do a local flush only, since this is a thread-specific buffer.
+         */
+        __flush_icache_range((unsigned long)state->buffer,
+                             (unsigned long)buffer);
+
+        /* Indicate enabled */
+        state->is_enabled = is_single_step;
+        regs->pc = (unsigned long)state->buffer;
+
+        /* Fault immediately if we are coming back from a syscall. */
+        if (regs->faultnum == INT_SWINT_1)
+                regs->pc += 8;
+}
+
+#endif /* !__tilegx__ */
diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c
new file mode 100644
index 000000000000..1cb5ec79de04
--- /dev/null
+++ b/arch/tile/kernel/smp.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * TILE SMP support routines.
+ */
+
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <asm/cacheflush.h>
+
+HV_Topology smp_topology __write_once;
+EXPORT_SYMBOL(smp_topology);
+
+#if CHIP_HAS_IPI()
+static unsigned long __iomem *ipi_mappings[NR_CPUS];
+#endif
+
+
+/*
+ * Top-level send_IPI*() functions to send messages to other cpus.
+ */
+
+/* Set by smp_send_stop() to avoid recursive panics. */
+static int stopping_cpus;
+
+void send_IPI_single(int cpu, int tag)
+{
+        HV_Recipient recip = {
+                .y = cpu / smp_width,
+                .x = cpu % smp_width,
+                .state = HV_TO_BE_SENT
+        };
+        int rc = hv_send_message(&recip, 1, (HV_VirtAddr)&tag, sizeof(tag));
+        BUG_ON(rc <= 0);
+}
+
+void send_IPI_many(const struct cpumask *mask, int tag)
+{
+        HV_Recipient recip[NR_CPUS];
+        int cpu, sent;
+        int nrecip = 0;
+        int my_cpu = smp_processor_id();
+        for_each_cpu(cpu, mask) {
+                HV_Recipient *r;
+                BUG_ON(cpu == my_cpu);
+                r = &recip[nrecip++];
+                r->y = cpu / smp_width;
+                r->x = cpu % smp_width;
+                r->state = HV_TO_BE_SENT;
+        }
+        sent = 0;
+        while (sent < nrecip) {
+                int rc = hv_send_message(recip, nrecip,
+                                         (HV_VirtAddr)&tag, sizeof(tag));
+                if (rc <= 0) {
+                        if (!stopping_cpus)  /* avoid recursive panic */
+                                panic("hv_send_message returned %d", rc);
+                        break;
+                }
+                sent += rc;
+        }
+}
+
+void send_IPI_allbutself(int tag)
+{
+        struct cpumask mask;
+        cpumask_copy(&mask, cpu_online_mask);
+        cpumask_clear_cpu(smp_processor_id(), &mask);
+        send_IPI_many(&mask, tag);
+}
+
+
+/*
+ * Provide smp_call_function_mask, but also run function locally
+ * if specified in the mask.
+ */
+void on_each_cpu_mask(const struct cpumask *mask, void (*func)(void *),
+                      void *info, bool wait)
+{
+        int cpu = get_cpu();
+        smp_call_function_many(mask, func, info, wait);
+        if (cpumask_test_cpu(cpu, mask)) {
+                local_irq_disable();
+                func(info);
+                local_irq_enable();
+        }
+        put_cpu();
+}
+
+
+/*
+ * Functions related to starting/stopping cpus.
+ */
+
+/* Handler to start the current cpu. */
+static void smp_start_cpu_interrupt(void)
+{
+        get_irq_regs()->pc = start_cpu_function_addr;
+}
+
+/* Handler to stop the current cpu. */
+static void smp_stop_cpu_interrupt(void)
+{
+        set_cpu_online(smp_processor_id(), 0);
+        raw_local_irq_disable_all();
+        for (;;)
+                asm("nap");
+}
+
+/* This function calls the 'stop' function on all other CPUs in the system. */
+void smp_send_stop(void)
+{
+        stopping_cpus = 1;
+        send_IPI_allbutself(MSG_TAG_STOP_CPU);
+}
+
+
+/*
+ * Dispatch code called from hv_message_intr() for HV_MSG_TILE hv messages.
+ */
+void evaluate_message(int tag)
+{
+        switch (tag) {
+        case MSG_TAG_START_CPU: /* Start up a cpu */
+                smp_start_cpu_interrupt();
+                break;
+
+        case MSG_TAG_STOP_CPU: /* Sent to shut down slave CPU's */
+                smp_stop_cpu_interrupt();
+                break;
+
+        case MSG_TAG_CALL_FUNCTION_MANY: /* Call function on cpumask */
+                generic_smp_call_function_interrupt();
+                break;
+
+        case MSG_TAG_CALL_FUNCTION_SINGLE: /* Call function on one other CPU */
+                generic_smp_call_function_single_interrupt();
+                break;
+
+        default:
+                panic("Unknown IPI message tag %d", tag);
+                break;
+        }
+}
+
+
+/*
+ * flush_icache_range() code uses smp_call_function().
+ */
+
+struct ipi_flush {
+        unsigned long start;
+        unsigned long end;
+};
+
+static void ipi_flush_icache_range(void *info)
+{
+        struct ipi_flush *flush = (struct ipi_flush *) info;
+        __flush_icache_range(flush->start, flush->end);
+}
+
+void flush_icache_range(unsigned long start, unsigned long end)
+{
+        struct ipi_flush flush = { start, end };
+        preempt_disable();
+        on_each_cpu(ipi_flush_icache_range, &flush, 1);
+        preempt_enable();
+}
+
+
+/* Called when smp_send_reschedule() triggers IRQ_RESCHEDULE. */
+static irqreturn_t handle_reschedule_ipi(int irq, void *token)
+{
+        /*
+         * Nothing to do here; when we return from interrupt, the
+         * rescheduling will occur there. But do bump the interrupt
+         * profiler count in the meantime.
+         */
+        __get_cpu_var(irq_stat).irq_resched_count++;
+
+        return IRQ_HANDLED;
+}
+
+static struct irqaction resched_action = {
+        .handler = handle_reschedule_ipi,
+        .name = "resched",
+        .dev_id = handle_reschedule_ipi /* unique token */,
+};
+
+void __init ipi_init(void)
+{
+#if CHIP_HAS_IPI()
+        int cpu;
+        /* Map IPI trigger MMIO addresses. */
+        for_each_possible_cpu(cpu) {
+                HV_Coord tile;
+                HV_PTE pte;
+                unsigned long offset;
+
+                tile.x = cpu_x(cpu);
+                tile.y = cpu_y(cpu);
+                if (hv_get_ipi_pte(tile, 1, &pte) != 0)
+                        panic("Failed to initialize IPI for cpu %d\n", cpu);
+
+                offset = hv_pte_get_pfn(pte) << PAGE_SHIFT;
+                ipi_mappings[cpu] = ioremap_prot(offset, PAGE_SIZE, pte);
+        }
+#endif
+
+        /* Bind handle_reschedule_ipi() to IRQ_RESCHEDULE. */
+        tile_irq_activate(IRQ_RESCHEDULE, TILE_IRQ_PERCPU);
+        BUG_ON(setup_irq(IRQ_RESCHEDULE, &resched_action));
+}
+
+#if CHIP_HAS_IPI()
+
+void smp_send_reschedule(int cpu)
+{
+        WARN_ON(cpu_is_offline(cpu));
+
+        /*
+         * We just want to do an MMIO store.  The traditional writeq()
+         * functions aren't really correct here, since they're always
+         * directed at the PCI shim.  For now, just do a raw store,
+         * casting away the __iomem attribute.
+         */
+        ((unsigned long __force *)ipi_mappings[cpu])[IRQ_RESCHEDULE] = 0;
+}
+
+#else
+
+void smp_send_reschedule(int cpu)
+{
+        HV_Coord coord;
+
+        WARN_ON(cpu_is_offline(cpu));
+
+        coord.y = cpu_y(cpu);
+        coord.x = cpu_x(cpu);
+        hv_trigger_ipi(coord, IRQ_RESCHEDULE);
+}
+
+#endif /* CHIP_HAS_IPI() */
diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c
new file mode 100644
index 000000000000..74d62d098edf
--- /dev/null
+++ b/arch/tile/kernel/smpboot.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/smp_lock.h>
+#include <linux/bootmem.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/percpu.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+
+/* State of each CPU. */
+static DEFINE_PER_CPU(int, cpu_state) = { 0 };
+
+/* The messaging code jumps to this pointer during boot-up */
+unsigned long start_cpu_function_addr;
+
+/* Called very early during startup to mark boot cpu as online */
+void __init smp_prepare_boot_cpu(void)
+{
+        int cpu = smp_processor_id();
+        set_cpu_online(cpu, 1);
+        set_cpu_present(cpu, 1);
+        __get_cpu_var(cpu_state) = CPU_ONLINE;
+
+        init_messaging();
+}
+
+static void start_secondary(void);
+
+/*
+ * Called at the top of init() to launch all the other CPUs.
+ * They run free to complete their initialization and then wait
+ * until they get an IPI from the boot cpu to come online.
+ */
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+        long rc;
+        int cpu, cpu_count;
+        int boot_cpu = smp_processor_id();
+
+        current_thread_info()->cpu = boot_cpu;
+
+        /*
+         * Pin this task to the boot CPU while we bring up the others,
+         * just to make sure we don't uselessly migrate as they come up.
+         */
+        rc = sched_setaffinity(current->pid, cpumask_of(boot_cpu));
+        if (rc != 0)
+                pr_err("Couldn't set init affinity to boot cpu (%ld)\n", rc);
+
+        /* Print information about disabled and dataplane cpus. */
+        print_disabled_cpus();
+
+        /*
+         * Tell the messaging subsystem how to respond to the
+         * startup message.  We use a level of indirection to avoid
+         * confusing the linker with the fact that the messaging
+         * subsystem is calling __init code.
+         */
+        start_cpu_function_addr = (unsigned long) &online_secondary;
+
+        /* Set up thread context for all new processors. */
+        cpu_count = 1;
+        for (cpu = 0; cpu < NR_CPUS; ++cpu)     {
+                struct task_struct *idle;
+
+                if (cpu == boot_cpu)
+                        continue;
+
+                if (!cpu_possible(cpu)) {
+                        /*
+                         * Make this processor do nothing on boot.
+                         * Note that we don't give the boot_pc function
+                         * a stack, so it has to be assembly code.
+                         */
+                        per_cpu(boot_sp, cpu) = 0;
+                        per_cpu(boot_pc, cpu) = (unsigned long) smp_nap;
+                        continue;
+                }
+
+                /* Create a new idle thread to run start_secondary() */
+                idle = fork_idle(cpu);
+                if (IS_ERR(idle))
+                        panic("failed fork for CPU %d", cpu);
+                idle->thread.pc = (unsigned long) start_secondary;
+
+                /* Make this thread the boot thread for this processor */
+                per_cpu(boot_sp, cpu) = task_ksp0(idle);
+                per_cpu(boot_pc, cpu) = idle->thread.pc;
+
+                ++cpu_count;
+        }
+        BUG_ON(cpu_count > (max_cpus ? max_cpus : 1));
+
+        /* Fire up the other tiles, if any */
+        init_cpu_present(cpu_possible_mask);
+        if (cpumask_weight(cpu_present_mask) > 1) {
+                mb();  /* make sure all data is visible to new processors */
+                hv_start_all_tiles();
+        }
+}
+
+static __initdata struct cpumask init_affinity;
+
+static __init int reset_init_affinity(void)
+{
+        long rc = sched_setaffinity(current->pid, &init_affinity);
+        if (rc != 0)
+                pr_warning("couldn't reset init affinity (%ld)\n",
+                       rc);
+        return 0;
+}
+late_initcall(reset_init_affinity);
+
+static struct cpumask cpu_started __cpuinitdata;
+
+/*
+ * Activate a secondary processor.  Very minimal; don't add anything
+ * to this path without knowing what you're doing, since SMP booting
+ * is pretty fragile.
+ */
+static void __cpuinit start_secondary(void)
+{
+        int cpuid = smp_processor_id();
+
+        /* Set our thread pointer appropriately. */
+        set_my_cpu_offset(__per_cpu_offset[cpuid]);
+
+        preempt_disable();
+
+        /*
+         * In large machines even this will slow us down, since we
+         * will be contending for for the printk spinlock.
+         */
+        /* printk(KERN_DEBUG "Initializing CPU#%d\n", cpuid); */
+
+        /* Initialize the current asid for our first page table. */
+        __get_cpu_var(current_asid) = min_asid;
+
+        /* Set up this thread as another owner of the init_mm */
+        atomic_inc(&init_mm.mm_count);
+        current->active_mm = &init_mm;
+        if (current->mm)
+                BUG();
+        enter_lazy_tlb(&init_mm, current);
+
+        /* Allow hypervisor messages to be received */
+        init_messaging();
+        local_irq_enable();
+
+        /* Indicate that we're ready to come up. */
+        /* Must not do this before we're ready to receive messages */
+        if (cpumask_test_and_set_cpu(cpuid, &cpu_started)) {
+                pr_warning("CPU#%d already started!\n", cpuid);
+                for (;;)
+                        local_irq_enable();
+        }
+
+        smp_nap();
+}
+
+/*
+ * Bring a secondary processor online.
+ */
+void __cpuinit online_secondary(void)
+{
+        /*
+         * low-memory mappings have been cleared, flush them from
+         * the local TLBs too.
+         */
+        local_flush_tlb();
+
+        BUG_ON(in_interrupt());
+
+        /* This must be done before setting cpu_online_mask */
+        wmb();
+
+        /*
+         * We need to hold call_lock, so there is no inconsistency
+         * between the time smp_call_function() determines number of
+         * IPI recipients, and the time when the determination is made
+         * for which cpus receive the IPI. Holding this
+         * lock helps us to not include this cpu in a currently in progress
+         * smp_call_function().
+         */
+        ipi_call_lock();
+        set_cpu_online(smp_processor_id(), 1);
+        ipi_call_unlock();
+        __get_cpu_var(cpu_state) = CPU_ONLINE;
+
+        /* Set up tile-specific state for this cpu. */
+        setup_cpu(0);
+
+        /* Set up tile-timer clock-event device on this cpu */
+        setup_tile_timer();
+
+        preempt_enable();
+
+        cpu_idle();
+}
+
+int __cpuinit __cpu_up(unsigned int cpu)
+{
+        /* Wait 5s total for all CPUs for them to come online */
+        static int timeout;
+        for (; !cpumask_test_cpu(cpu, &cpu_started); timeout++) {
+                if (timeout >= 50000) {
+                        pr_info("skipping unresponsive cpu%d\n", cpu);
+                        local_irq_enable();
+                        return -EIO;
+                }
+                udelay(100);
+        }
+
+        local_irq_enable();
+        per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
+
+        /* Unleash the CPU! */
+        send_IPI_single(cpu, MSG_TAG_START_CPU);
+        while (!cpumask_test_cpu(cpu, cpu_online_mask))
+                cpu_relax();
+        return 0;
+}
+
+static void panic_start_cpu(void)
+{
+        panic("Received a MSG_START_CPU IPI after boot finished.");
+}
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+        int cpu, next, rc;
+
+        /* Reset the response to a (now illegal) MSG_START_CPU IPI. */
+        start_cpu_function_addr = (unsigned long) &panic_start_cpu;
+
+        cpumask_copy(&init_affinity, cpu_online_mask);
+
+        /*
+         * Pin ourselves to a single cpu in the initial affinity set
+         * so that kernel mappings for the rootfs are not in the dataplane,
+         * if set, and to avoid unnecessary migrating during bringup.
+         * Use the last cpu just in case the whole chip has been
+         * isolated from the scheduler, to keep init away from likely
+         * more useful user code.  This also ensures that work scheduled
+         * via schedule_delayed_work() in the init routines will land
+         * on this cpu.
+         */
+        for (cpu = cpumask_first(&init_affinity);
+             (next = cpumask_next(cpu, &init_affinity)) < nr_cpu_ids;
+             cpu = next)
+                ;
+        rc = sched_setaffinity(current->pid, cpumask_of(cpu));
+        if (rc != 0)
+                pr_err("Couldn't set init affinity to cpu %d (%d)\n", cpu, rc);
+}
diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c
new file mode 100644
index 000000000000..38a68b0b4581
--- /dev/null
+++ b/arch/tile/kernel/stack.c
@@ -0,0 +1,478 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/kprobes.h>
+#include <linux/module.h>
+#include <linux/pfn.h>
+#include <linux/kallsyms.h>
+#include <linux/stacktrace.h>
+#include <linux/uaccess.h>
+#include <linux/mmzone.h>
+#include <asm/backtrace.h>
+#include <asm/page.h>
+#include <asm/tlbflush.h>
+#include <asm/ucontext.h>
+#include <asm/sigframe.h>
+#include <asm/stack.h>
+#include <arch/abi.h>
+#include <arch/interrupts.h>
+
+
+/* Is address on the specified kernel stack? */
+static int in_kernel_stack(struct KBacktraceIterator *kbt, VirtualAddress sp)
+{
+        ulong kstack_base = (ulong) kbt->task->stack;
+        if (kstack_base == 0)  /* corrupt task pointer; just follow stack... */
+                return sp >= PAGE_OFFSET && sp < (unsigned long)high_memory;
+        return sp >= kstack_base && sp < kstack_base + THREAD_SIZE;
+}
+
+/* Is address in the specified kernel code? */
+static int in_kernel_text(VirtualAddress address)
+{
+        return (address >= MEM_SV_INTRPT &&
+                address < MEM_SV_INTRPT + HPAGE_SIZE);
+}
+
+/* Is address valid for reading? */
+static int valid_address(struct KBacktraceIterator *kbt, VirtualAddress address)
+{
+        HV_PTE *l1_pgtable = kbt->pgtable;
+        HV_PTE *l2_pgtable;
+        unsigned long pfn;
+        HV_PTE pte;
+        struct page *page;
+
+        if (l1_pgtable == NULL)
+                return 0;       /* can't read user space in other tasks */
+
+        pte = l1_pgtable[HV_L1_INDEX(address)];
+        if (!hv_pte_get_present(pte))
+                return 0;
+        pfn = hv_pte_get_pfn(pte);
+        if (pte_huge(pte)) {
+                if (!pfn_valid(pfn)) {
+                        pr_err("huge page has bad pfn %#lx\n", pfn);
+                        return 0;
+                }
+                return hv_pte_get_present(pte) && hv_pte_get_readable(pte);
+        }
+
+        page = pfn_to_page(pfn);
+        if (PageHighMem(page)) {
+                pr_err("L2 page table not in LOWMEM (%#llx)\n",
+                       HV_PFN_TO_CPA(pfn));
+                return 0;
+        }
+        l2_pgtable = (HV_PTE *)pfn_to_kaddr(pfn);
+        pte = l2_pgtable[HV_L2_INDEX(address)];
+        return hv_pte_get_present(pte) && hv_pte_get_readable(pte);
+}
+
+/* Callback for backtracer; basically a glorified memcpy */
+static bool read_memory_func(void *result, VirtualAddress address,
+                             unsigned int size, void *vkbt)
+{
+        int retval;
+        struct KBacktraceIterator *kbt = (struct KBacktraceIterator *)vkbt;
+        if (in_kernel_text(address)) {
+                /* OK to read kernel code. */
+        } else if (address >= PAGE_OFFSET) {
+                /* We only tolerate kernel-space reads of this task's stack */
+                if (!in_kernel_stack(kbt, address))
+                        return 0;
+        } else if (!valid_address(kbt, address)) {
+                return 0;       /* invalid user-space address */
+        }
+        pagefault_disable();
+        retval = __copy_from_user_inatomic(result,
+                                           (void __user __force *)address,
+                                           size);
+        pagefault_enable();
+        return (retval == 0);
+}
+
+/* Return a pt_regs pointer for a valid fault handler frame */
+static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
+{
+        const char *fault = NULL;  /* happy compiler */
+        char fault_buf[64];
+        VirtualAddress sp = kbt->it.sp;
+        struct pt_regs *p;
+
+        if (!in_kernel_stack(kbt, sp))
+                return NULL;
+        if (!in_kernel_stack(kbt, sp + C_ABI_SAVE_AREA_SIZE + PTREGS_SIZE-1))
+                return NULL;
+        p = (struct pt_regs *)(sp + C_ABI_SAVE_AREA_SIZE);
+        if (p->faultnum == INT_SWINT_1 || p->faultnum == INT_SWINT_1_SIGRETURN)
+                fault = "syscall";
+        else {
+                if (kbt->verbose) {     /* else we aren't going to use it */
+                        snprintf(fault_buf, sizeof(fault_buf),
+                                 "interrupt %ld", p->faultnum);
+                        fault = fault_buf;
+                }
+        }
+        if (EX1_PL(p->ex1) == KERNEL_PL &&
+            in_kernel_text(p->pc) &&
+            in_kernel_stack(kbt, p->sp) &&
+            p->sp >= sp) {
+                if (kbt->verbose)
+                        pr_err("  <%s while in kernel mode>\n", fault);
+        } else if (EX1_PL(p->ex1) == USER_PL &&
+            p->pc < PAGE_OFFSET &&
+            p->sp < PAGE_OFFSET) {
+                if (kbt->verbose)
+                        pr_err("  <%s while in user mode>\n", fault);
+        } else if (kbt->verbose) {
+                pr_err("  (odd fault: pc %#lx, sp %#lx, ex1 %#lx?)\n",
+                       p->pc, p->sp, p->ex1);
+                p = NULL;
+        }
+        if (!kbt->profile || (INT_MASK(p->faultnum) & QUEUED_INTERRUPTS) == 0)
+                return p;
+        return NULL;
+}
+
+/* Is the pc pointing to a sigreturn trampoline? */
+static int is_sigreturn(VirtualAddress pc)
+{
+        return (pc == VDSO_BASE);
+}
+
+/* Return a pt_regs pointer for a valid signal handler frame */
+static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt)
+{
+        BacktraceIterator *b = &kbt->it;
+
+        if (b->pc == VDSO_BASE) {
+                struct rt_sigframe *frame;
+                unsigned long sigframe_top =
+                        b->sp + sizeof(struct rt_sigframe) - 1;
+                if (!valid_address(kbt, b->sp) ||
+                    !valid_address(kbt, sigframe_top)) {
+                        if (kbt->verbose)
+                                pr_err("  (odd signal: sp %#lx?)\n",
+                                       (unsigned long)(b->sp));
+                        return NULL;
+                }
+                frame = (struct rt_sigframe *)b->sp;
+                if (kbt->verbose) {
+                        pr_err("  <received signal %d>\n",
+                               frame->info.si_signo);
+                }
+                return &frame->uc.uc_mcontext.regs;
+        }
+        return NULL;
+}
+
+static int KBacktraceIterator_is_sigreturn(struct KBacktraceIterator *kbt)
+{
+        return is_sigreturn(kbt->it.pc);
+}
+
+static int KBacktraceIterator_restart(struct KBacktraceIterator *kbt)
+{
+        struct pt_regs *p;
+
+        p = valid_fault_handler(kbt);
+        if (p == NULL)
+                p = valid_sigframe(kbt);
+        if (p == NULL)
+                return 0;
+        backtrace_init(&kbt->it, read_memory_func, kbt,
+                       p->pc, p->lr, p->sp, p->regs[52]);
+        kbt->new_context = 1;
+        return 1;
+}
+
+/* Find a frame that isn't a sigreturn, if there is one. */
+static int KBacktraceIterator_next_item_inclusive(
+        struct KBacktraceIterator *kbt)
+{
+        for (;;) {
+                do {
+                        if (!KBacktraceIterator_is_sigreturn(kbt))
+                                return 1;
+                } while (backtrace_next(&kbt->it));
+
+                if (!KBacktraceIterator_restart(kbt))
+                        return 0;
+        }
+}
+
+/*
+ * If the current sp is on a page different than what we recorded
+ * as the top-of-kernel-stack last time we context switched, we have
+ * probably blown the stack, and nothing is going to work out well.
+ * If we can at least get out a warning, that may help the debug,
+ * though we probably won't be able to backtrace into the code that
+ * actually did the recursive damage.
+ */
+static void validate_stack(struct pt_regs *regs)
+{
+        int cpu = smp_processor_id();
+        unsigned long ksp0 = get_current_ksp0();
+        unsigned long ksp0_base = ksp0 - THREAD_SIZE;
+        unsigned long sp = stack_pointer;
+
+        if (EX1_PL(regs->ex1) == KERNEL_PL && regs->sp >= ksp0) {
+                pr_err("WARNING: cpu %d: kernel stack page %#lx underrun!\n"
+                       "  sp %#lx (%#lx in caller), caller pc %#lx, lr %#lx\n",
+                       cpu, ksp0_base, sp, regs->sp, regs->pc, regs->lr);
+        }
+
+        else if (sp < ksp0_base + sizeof(struct thread_info)) {
+                pr_err("WARNING: cpu %d: kernel stack page %#lx overrun!\n"
+                       "  sp %#lx (%#lx in caller), caller pc %#lx, lr %#lx\n",
+                       cpu, ksp0_base, sp, regs->sp, regs->pc, regs->lr);
+        }
+}
+
+void KBacktraceIterator_init(struct KBacktraceIterator *kbt,
+                             struct task_struct *t, struct pt_regs *regs)
+{
+        VirtualAddress pc, lr, sp, r52;
+        int is_current;
+
+        /*
+         * Set up callback information.  We grab the kernel stack base
+         * so we will allow reads of that address range, and if we're
+         * asking about the current process we grab the page table
+         * so we can check user accesses before trying to read them.
+         * We flush the TLB to avoid any weird skew issues.
+         */
+        is_current = (t == NULL);
+        kbt->is_current = is_current;
+        if (is_current)
+                t = validate_current();
+        kbt->task = t;
+        kbt->pgtable = NULL;
+        kbt->verbose = 0;   /* override in caller if desired */
+        kbt->profile = 0;   /* override in caller if desired */
+        kbt->end = 0;
+        kbt->new_context = 0;
+        if (is_current) {
+                HV_PhysAddr pgdir_pa = hv_inquire_context().page_table;
+                if (pgdir_pa == (unsigned long)swapper_pg_dir - PAGE_OFFSET) {
+                        /*
+                         * Not just an optimization: this also allows
+                         * this to work at all before va/pa mappings
+                         * are set up.
+                         */
+                        kbt->pgtable = swapper_pg_dir;
+                } else {
+                        struct page *page = pfn_to_page(PFN_DOWN(pgdir_pa));
+                        if (!PageHighMem(page))
+                                kbt->pgtable = __va(pgdir_pa);
+                        else
+                                pr_err("page table not in LOWMEM"
+                                       " (%#llx)\n", pgdir_pa);
+                }
+                local_flush_tlb_all();
+                validate_stack(regs);
+        }
+
+        if (regs == NULL) {
+                if (is_current || t->state == TASK_RUNNING) {
+                        /* Can't do this; we need registers */
+                        kbt->end = 1;
+                        return;
+                }
+                pc = get_switch_to_pc();
+                lr = t->thread.pc;
+                sp = t->thread.ksp;
+                r52 = 0;
+        } else {
+                pc = regs->pc;
+                lr = regs->lr;
+                sp = regs->sp;
+                r52 = regs->regs[52];
+        }
+
+        backtrace_init(&kbt->it, read_memory_func, kbt, pc, lr, sp, r52);
+        kbt->end = !KBacktraceIterator_next_item_inclusive(kbt);
+}
+EXPORT_SYMBOL(KBacktraceIterator_init);
+
+int KBacktraceIterator_end(struct KBacktraceIterator *kbt)
+{
+        return kbt->end;
+}
+EXPORT_SYMBOL(KBacktraceIterator_end);
+
+void KBacktraceIterator_next(struct KBacktraceIterator *kbt)
+{
+        kbt->new_context = 0;
+        if (!backtrace_next(&kbt->it) &&
+            !KBacktraceIterator_restart(kbt)) {
+                        kbt->end = 1;
+                        return;
+                }
+
+        kbt->end = !KBacktraceIterator_next_item_inclusive(kbt);
+}
+EXPORT_SYMBOL(KBacktraceIterator_next);
+
+/*
+ * This method wraps the backtracer's more generic support.
+ * It is only invoked from the architecture-specific code; show_stack()
+ * and dump_stack() (in entry.S) are architecture-independent entry points.
+ */
+void tile_show_stack(struct KBacktraceIterator *kbt, int headers)
+{
+        int i;
+
+        if (headers) {
+                /*
+                 * Add a blank line since if we are called from panic(),
+                 * then bust_spinlocks() spit out a space in front of us
+                 * and it will mess up our KERN_ERR.
+                 */
+                pr_err("\n");
+                pr_err("Starting stack dump of tid %d, pid %d (%s)"
+                       " on cpu %d at cycle %lld\n",
+                       kbt->task->pid, kbt->task->tgid, kbt->task->comm,
+                       smp_processor_id(), get_cycles());
+        }
+        kbt->verbose = 1;
+        i = 0;
+        for (; !KBacktraceIterator_end(kbt); KBacktraceIterator_next(kbt)) {
+                char *modname;
+                const char *name;
+                unsigned long address = kbt->it.pc;
+                unsigned long offset, size;
+                char namebuf[KSYM_NAME_LEN+100];
+
+                if (address >= PAGE_OFFSET)
+                        name = kallsyms_lookup(address, &size, &offset,
+                                               &modname, namebuf);
+                else
+                        name = NULL;
+
+                if (!name)
+                        namebuf[0] = '\0';
+                else {
+                        size_t namelen = strlen(namebuf);
+                        size_t remaining = (sizeof(namebuf) - 1) - namelen;
+                        char *p = namebuf + namelen;
+                        int rc = snprintf(p, remaining, "+%#lx/%#lx ",
+                                          offset, size);
+                        if (modname && rc < remaining)
+                                snprintf(p + rc, remaining - rc,
+                                         "[%s] ", modname);
+                        namebuf[sizeof(namebuf)-1] = '\0';
+                }
+
+                pr_err("  frame %d: 0x%lx %s(sp 0x%lx)\n",
+                       i++, address, namebuf, (unsigned long)(kbt->it.sp));
+
+                if (i >= 100) {
+                        pr_err("Stack dump truncated"
+                               " (%d frames)\n", i);
+                        break;
+                }
+        }
+        if (headers)
+                pr_err("Stack dump complete\n");
+}
+EXPORT_SYMBOL(tile_show_stack);
+
+
+/* This is called from show_regs() and _dump_stack() */
+void dump_stack_regs(struct pt_regs *regs)
+{
+        struct KBacktraceIterator kbt;
+        KBacktraceIterator_init(&kbt, NULL, regs);
+        tile_show_stack(&kbt, 1);
+}
+EXPORT_SYMBOL(dump_stack_regs);
+
+static struct pt_regs *regs_to_pt_regs(struct pt_regs *regs,
+                                       ulong pc, ulong lr, ulong sp, ulong r52)
+{
+        memset(regs, 0, sizeof(struct pt_regs));
+        regs->pc = pc;
+        regs->lr = lr;
+        regs->sp = sp;
+        regs->regs[52] = r52;
+        return regs;
+}
+
+/* This is called from dump_stack() and just converts to pt_regs */
+void _dump_stack(int dummy, ulong pc, ulong lr, ulong sp, ulong r52)
+{
+        struct pt_regs regs;
+        dump_stack_regs(regs_to_pt_regs(&regs, pc, lr, sp, r52));
+}
+
+/* This is called from KBacktraceIterator_init_current() */
+void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, ulong pc,
+                                      ulong lr, ulong sp, ulong r52)
+{
+        struct pt_regs regs;
+        KBacktraceIterator_init(kbt, NULL,
+                                regs_to_pt_regs(&regs, pc, lr, sp, r52));
+}
+
+/* This is called only from kernel/sched.c, with esp == NULL */
+void show_stack(struct task_struct *task, unsigned long *esp)
+{
+        struct KBacktraceIterator kbt;
+        if (task == NULL || task == current)
+                KBacktraceIterator_init_current(&kbt);
+        else
+                KBacktraceIterator_init(&kbt, task, NULL);
+        tile_show_stack(&kbt, 0);
+}
+
+#ifdef CONFIG_STACKTRACE
+
+/* Support generic Linux stack API too */
+
+void save_stack_trace_tsk(struct task_struct *task, struct stack_trace *trace)
+{
+        struct KBacktraceIterator kbt;
+        int skip = trace->skip;
+        int i = 0;
+
+        if (task == NULL || task == current)
+                KBacktraceIterator_init_current(&kbt);
+        else
+                KBacktraceIterator_init(&kbt, task, NULL);
+        for (; !KBacktraceIterator_end(&kbt); KBacktraceIterator_next(&kbt)) {
+                if (skip) {
+                        --skip;
+                        continue;
+                }
+                if (i >= trace->max_entries || kbt.it.pc < PAGE_OFFSET)
+                        break;
+                trace->entries[i++] = kbt.it.pc;
+        }
+        trace->nr_entries = i;
+}
+EXPORT_SYMBOL(save_stack_trace_tsk);
+
+void save_stack_trace(struct stack_trace *trace)
+{
+        save_stack_trace_tsk(NULL, trace);
+}
+
+#endif
+
+/* In entry.S */
+EXPORT_SYMBOL(KBacktraceIterator_init_current);
diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c
new file mode 100644
index 000000000000..f0f87eab8c39
--- /dev/null
+++ b/arch/tile/kernel/sys.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/TILE
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/mempolicy.h>
+#include <linux/binfmts.h>
+#include <linux/fs.h>
+#include <linux/compat.h>
+#include <linux/uaccess.h>
+#include <linux/signal.h>
+#include <asm/syscalls.h>
+#include <asm/pgtable.h>
+#include <asm/homecache.h>
+#include <arch/chip.h>
+
+SYSCALL_DEFINE0(flush_cache)
+{
+        homecache_evict(cpumask_of(smp_processor_id()));
+        return 0;
+}
+
+/*
+ * Syscalls that pass 64-bit values on 32-bit systems normally
+ * pass them as (low,high) word packed into the immediately adjacent
+ * registers.  If the low word naturally falls on an even register,
+ * our ABI makes it work correctly; if not, we adjust it here.
+ * Handling it here means we don't have to fix uclibc AND glibc AND
+ * any other standard libcs we want to support.
+ */
+
+#if !defined(__tilegx__) || defined(CONFIG_COMPAT)
+
+ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count)
+{
+        return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);
+}
+
+long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi,
+                     u32 len, int advice)
+{
+        return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
+                                len, advice);
+}
+
+int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi,
+                       u32 len_lo, u32 len_hi, int advice)
+{
+        return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
+                                ((loff_t)len_hi << 32) | len_lo, advice);
+}
+
+#endif /* 32-bit syscall wrappers */
+
+/* Note: used by the compat code even in 64-bit Linux. */
+SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
+                unsigned long, prot, unsigned long, flags,
+                unsigned long, fd, unsigned long, off_4k)
+{
+#define PAGE_ADJUST (PAGE_SHIFT - 12)
+        if (off_4k & ((1 << PAGE_ADJUST) - 1))
+                return -EINVAL;
+        return sys_mmap_pgoff(addr, len, prot, flags, fd,
+                              off_4k >> PAGE_ADJUST);
+}
+
+#ifdef __tilegx__
+SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
+                unsigned long, prot, unsigned long, flags,
+                unsigned long, fd, off_t, offset)
+{
+        if (offset & ((1 << PAGE_SHIFT) - 1))
+                return -EINVAL;
+        return sys_mmap_pgoff(addr, len, prot, flags, fd,
+                              offset >> PAGE_SHIFT);
+}
+#endif
+
+
+/* Provide the actual syscall number to call mapping. */
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+#ifndef __tilegx__
+/* See comments at the top of the file. */
+#define sys_fadvise64 sys32_fadvise64
+#define sys_fadvise64_64 sys32_fadvise64_64
+#define sys_readahead sys32_readahead
+#define sys_sync_file_range sys_sync_file_range2
+#endif
+
+/*
+ * Note that we can't include <linux/unistd.h> here since the header
+ * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
+ */
+void *sys_call_table[__NR_syscalls] = {
+        [0 ... __NR_syscalls-1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/tile/kernel/tile-desc_32.c b/arch/tile/kernel/tile-desc_32.c
new file mode 100644
index 000000000000..69af0e150f78
--- /dev/null
+++ b/arch/tile/kernel/tile-desc_32.c
@@ -0,0 +1,2498 @@
+/* This define is BFD_RELOC_##x for real bfd, or -1 for everyone else. */
+#define BFD_RELOC(x) -1
+
+/* Special registers. */
+#define TREG_LR 55
+#define TREG_SN 56
+#define TREG_ZERO 63
+
+/* FIXME: Rename this. */
+#include <asm/opcode-tile.h>
+
+#include <linux/stddef.h>
+
+const struct tile_opcode tile_opcodes[395] =
+{
+ { "bpt", TILE_OPC_BPT, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "info", TILE_OPC_INFO, 0xf, 1, TREG_ZERO, 1,
+    { { 0 }, { 1 }, { 2 }, { 3 }, { 0, } },
+  },
+  { "infol", TILE_OPC_INFOL, 0x3, 1, TREG_ZERO, 1,
+    { { 4 }, { 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "j", TILE_OPC_J, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 6 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jal", TILE_OPC_JAL, 0x2, 1, TREG_LR, 1,
+    { { 0, }, { 6 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "move", TILE_OPC_MOVE, 0xf, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 9, 10 }, { 11, 12 }, { 13, 14 }, { 0, } },
+  },
+  { "move.sn", TILE_OPC_MOVE_SN, 0x3, 2, TREG_SN, 1,
+    { { 7, 8 }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "movei", TILE_OPC_MOVEI, 0xf, 2, TREG_ZERO, 1,
+    { { 7, 0 }, { 9, 1 }, { 11, 2 }, { 13, 3 }, { 0, } },
+  },
+  { "movei.sn", TILE_OPC_MOVEI_SN, 0x3, 2, TREG_SN, 1,
+    { { 7, 0 }, { 9, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "moveli", TILE_OPC_MOVELI, 0x3, 2, TREG_ZERO, 1,
+    { { 7, 4 }, { 9, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "moveli.sn", TILE_OPC_MOVELI_SN, 0x3, 2, TREG_SN, 1,
+    { { 7, 4 }, { 9, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "movelis", TILE_OPC_MOVELIS, 0x3, 2, TREG_SN, 1,
+    { { 7, 4 }, { 9, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "prefetch", TILE_OPC_PREFETCH, 0x12, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 15 } },
+  },
+  { "raise", TILE_OPC_RAISE, 0x2, 0, TREG_ZERO, 1,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "add", TILE_OPC_ADD, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "add.sn", TILE_OPC_ADD_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addb", TILE_OPC_ADDB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addb.sn", TILE_OPC_ADDB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addbs_u", TILE_OPC_ADDBS_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addbs_u.sn", TILE_OPC_ADDBS_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addh", TILE_OPC_ADDH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addh.sn", TILE_OPC_ADDH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addhs", TILE_OPC_ADDHS, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addhs.sn", TILE_OPC_ADDHS_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addi", TILE_OPC_ADDI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "addi.sn", TILE_OPC_ADDI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addib", TILE_OPC_ADDIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addib.sn", TILE_OPC_ADDIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addih", TILE_OPC_ADDIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addih.sn", TILE_OPC_ADDIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addli", TILE_OPC_ADDLI, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 4 }, { 9, 10, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addli.sn", TILE_OPC_ADDLI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 4 }, { 9, 10, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "addlis", TILE_OPC_ADDLIS, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 4 }, { 9, 10, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adds", TILE_OPC_ADDS, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adds.sn", TILE_OPC_ADDS_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adiffb_u", TILE_OPC_ADIFFB_U, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adiffb_u.sn", TILE_OPC_ADIFFB_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adiffh", TILE_OPC_ADIFFH, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "adiffh.sn", TILE_OPC_ADIFFH_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "and", TILE_OPC_AND, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "and.sn", TILE_OPC_AND_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "andi", TILE_OPC_ANDI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "andi.sn", TILE_OPC_ANDI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "auli", TILE_OPC_AULI, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 4 }, { 9, 10, 5 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "avgb_u", TILE_OPC_AVGB_U, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "avgb_u.sn", TILE_OPC_AVGB_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "avgh", TILE_OPC_AVGH, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "avgh.sn", TILE_OPC_AVGH_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbns", TILE_OPC_BBNS, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbns.sn", TILE_OPC_BBNS_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbnst", TILE_OPC_BBNST, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbnst.sn", TILE_OPC_BBNST_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbs", TILE_OPC_BBS, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbs.sn", TILE_OPC_BBS_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbst", TILE_OPC_BBST, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bbst.sn", TILE_OPC_BBST_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgez", TILE_OPC_BGEZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgez.sn", TILE_OPC_BGEZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgezt", TILE_OPC_BGEZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgezt.sn", TILE_OPC_BGEZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgz", TILE_OPC_BGZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgz.sn", TILE_OPC_BGZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgzt", TILE_OPC_BGZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bgzt.sn", TILE_OPC_BGZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bitx", TILE_OPC_BITX, 0x5, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 0, }, { 11, 12 }, { 0, }, { 0, } },
+  },
+  { "bitx.sn", TILE_OPC_BITX_SN, 0x1, 2, TREG_SN, 1,
+    { { 7, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blez", TILE_OPC_BLEZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blez.sn", TILE_OPC_BLEZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blezt", TILE_OPC_BLEZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blezt.sn", TILE_OPC_BLEZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blz", TILE_OPC_BLZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blz.sn", TILE_OPC_BLZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blzt", TILE_OPC_BLZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "blzt.sn", TILE_OPC_BLZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bnz", TILE_OPC_BNZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bnz.sn", TILE_OPC_BNZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bnzt", TILE_OPC_BNZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bnzt.sn", TILE_OPC_BNZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bytex", TILE_OPC_BYTEX, 0x5, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 0, }, { 11, 12 }, { 0, }, { 0, } },
+  },
+  { "bytex.sn", TILE_OPC_BYTEX_SN, 0x1, 2, TREG_SN, 1,
+    { { 7, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bz", TILE_OPC_BZ, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bz.sn", TILE_OPC_BZ_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bzt", TILE_OPC_BZT, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "bzt.sn", TILE_OPC_BZT_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 10, 20 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "clz", TILE_OPC_CLZ, 0x5, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 0, }, { 11, 12 }, { 0, }, { 0, } },
+  },
+  { "clz.sn", TILE_OPC_CLZ_SN, 0x1, 2, TREG_SN, 1,
+    { { 7, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "crc32_32", TILE_OPC_CRC32_32, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "crc32_32.sn", TILE_OPC_CRC32_32_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "crc32_8", TILE_OPC_CRC32_8, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "crc32_8.sn", TILE_OPC_CRC32_8_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "ctz", TILE_OPC_CTZ, 0x5, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 0, }, { 11, 12 }, { 0, }, { 0, } },
+  },
+  { "ctz.sn", TILE_OPC_CTZ_SN, 0x1, 2, TREG_SN, 1,
+    { { 7, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "drain", TILE_OPC_DRAIN, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "dtlbpr", TILE_OPC_DTLBPR, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "dword_align", TILE_OPC_DWORD_ALIGN, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "dword_align.sn", TILE_OPC_DWORD_ALIGN_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "finv", TILE_OPC_FINV, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "flush", TILE_OPC_FLUSH, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "fnop", TILE_OPC_FNOP, 0xf, 0, TREG_ZERO, 1,
+    { {  }, {  }, {  }, {  }, { 0, } },
+  },
+  { "icoh", TILE_OPC_ICOH, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "ill", TILE_OPC_ILL, 0xa, 0, TREG_ZERO, 1,
+    { { 0, }, {  }, { 0, }, {  }, { 0, } },
+  },
+  { "inthb", TILE_OPC_INTHB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "inthb.sn", TILE_OPC_INTHB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "inthh", TILE_OPC_INTHH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "inthh.sn", TILE_OPC_INTHH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "intlb", TILE_OPC_INTLB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "intlb.sn", TILE_OPC_INTLB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "intlh", TILE_OPC_INTLH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "intlh.sn", TILE_OPC_INTLH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "inv", TILE_OPC_INV, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "iret", TILE_OPC_IRET, 0x2, 0, TREG_ZERO, 1,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jalb", TILE_OPC_JALB, 0x2, 1, TREG_LR, 1,
+    { { 0, }, { 22 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jalf", TILE_OPC_JALF, 0x2, 1, TREG_LR, 1,
+    { { 0, }, { 22 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jalr", TILE_OPC_JALR, 0x2, 1, TREG_LR, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jalrp", TILE_OPC_JALRP, 0x2, 1, TREG_LR, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jb", TILE_OPC_JB, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 22 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jf", TILE_OPC_JF, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 22 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jr", TILE_OPC_JR, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "jrp", TILE_OPC_JRP, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lb", TILE_OPC_LB, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 23, 15 } },
+  },
+  { "lb.sn", TILE_OPC_LB_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lb_u", TILE_OPC_LB_U, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 23, 15 } },
+  },
+  { "lb_u.sn", TILE_OPC_LB_U_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lbadd", TILE_OPC_LBADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lbadd.sn", TILE_OPC_LBADD_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lbadd_u", TILE_OPC_LBADD_U, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lbadd_u.sn", TILE_OPC_LBADD_U_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lh", TILE_OPC_LH, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 23, 15 } },
+  },
+  { "lh.sn", TILE_OPC_LH_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lh_u", TILE_OPC_LH_U, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 23, 15 } },
+  },
+  { "lh_u.sn", TILE_OPC_LH_U_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lhadd", TILE_OPC_LHADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lhadd.sn", TILE_OPC_LHADD_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lhadd_u", TILE_OPC_LHADD_U, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lhadd_u.sn", TILE_OPC_LHADD_U_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lnk", TILE_OPC_LNK, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 9 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lnk.sn", TILE_OPC_LNK_SN, 0x2, 1, TREG_SN, 1,
+    { { 0, }, { 9 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lw", TILE_OPC_LW, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 23, 15 } },
+  },
+  { "lw.sn", TILE_OPC_LW_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lw_na", TILE_OPC_LW_NA, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lw_na.sn", TILE_OPC_LW_NA_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lwadd", TILE_OPC_LWADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lwadd.sn", TILE_OPC_LWADD_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lwadd_na", TILE_OPC_LWADD_NA, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "lwadd_na.sn", TILE_OPC_LWADD_NA_SN, 0x2, 3, TREG_SN, 1,
+    { { 0, }, { 9, 24, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxb_u", TILE_OPC_MAXB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxb_u.sn", TILE_OPC_MAXB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxh", TILE_OPC_MAXH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxh.sn", TILE_OPC_MAXH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxib_u", TILE_OPC_MAXIB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxib_u.sn", TILE_OPC_MAXIB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxih", TILE_OPC_MAXIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "maxih.sn", TILE_OPC_MAXIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mf", TILE_OPC_MF, 0x2, 0, TREG_ZERO, 1,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mfspr", TILE_OPC_MFSPR, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 25 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minb_u", TILE_OPC_MINB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minb_u.sn", TILE_OPC_MINB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minh", TILE_OPC_MINH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minh.sn", TILE_OPC_MINH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minib_u", TILE_OPC_MINIB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minib_u.sn", TILE_OPC_MINIB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minih", TILE_OPC_MINIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "minih.sn", TILE_OPC_MINIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mm", TILE_OPC_MM, 0x3, 5, TREG_ZERO, 1,
+    { { 7, 8, 16, 26, 27 }, { 9, 10, 17, 28, 29 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mnz", TILE_OPC_MNZ, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "mnz.sn", TILE_OPC_MNZ_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mnzb", TILE_OPC_MNZB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mnzb.sn", TILE_OPC_MNZB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mnzh", TILE_OPC_MNZH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mnzh.sn", TILE_OPC_MNZH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mtspr", TILE_OPC_MTSPR, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 30, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhh_ss", TILE_OPC_MULHH_SS, 0x5, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 11, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulhh_ss.sn", TILE_OPC_MULHH_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhh_su", TILE_OPC_MULHH_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhh_su.sn", TILE_OPC_MULHH_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhh_uu", TILE_OPC_MULHH_UU, 0x5, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 11, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulhh_uu.sn", TILE_OPC_MULHH_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhha_ss", TILE_OPC_MULHHA_SS, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulhha_ss.sn", TILE_OPC_MULHHA_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhha_su", TILE_OPC_MULHHA_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhha_su.sn", TILE_OPC_MULHHA_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhha_uu", TILE_OPC_MULHHA_UU, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulhha_uu.sn", TILE_OPC_MULHHA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhhsa_uu", TILE_OPC_MULHHSA_UU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhhsa_uu.sn", TILE_OPC_MULHHSA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_ss", TILE_OPC_MULHL_SS, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_ss.sn", TILE_OPC_MULHL_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_su", TILE_OPC_MULHL_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_su.sn", TILE_OPC_MULHL_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_us", TILE_OPC_MULHL_US, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_us.sn", TILE_OPC_MULHL_US_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_uu", TILE_OPC_MULHL_UU, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhl_uu.sn", TILE_OPC_MULHL_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_ss", TILE_OPC_MULHLA_SS, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_ss.sn", TILE_OPC_MULHLA_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_su", TILE_OPC_MULHLA_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_su.sn", TILE_OPC_MULHLA_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_us", TILE_OPC_MULHLA_US, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_us.sn", TILE_OPC_MULHLA_US_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_uu", TILE_OPC_MULHLA_UU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhla_uu.sn", TILE_OPC_MULHLA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulhlsa_uu", TILE_OPC_MULHLSA_UU, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulhlsa_uu.sn", TILE_OPC_MULHLSA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulll_ss", TILE_OPC_MULLL_SS, 0x5, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 11, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulll_ss.sn", TILE_OPC_MULLL_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulll_su", TILE_OPC_MULLL_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulll_su.sn", TILE_OPC_MULLL_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulll_uu", TILE_OPC_MULLL_UU, 0x5, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 11, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mulll_uu.sn", TILE_OPC_MULLL_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mullla_ss", TILE_OPC_MULLLA_SS, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mullla_ss.sn", TILE_OPC_MULLLA_SS_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mullla_su", TILE_OPC_MULLLA_SU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mullla_su.sn", TILE_OPC_MULLLA_SU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mullla_uu", TILE_OPC_MULLLA_UU, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mullla_uu.sn", TILE_OPC_MULLLA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulllsa_uu", TILE_OPC_MULLLSA_UU, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mulllsa_uu.sn", TILE_OPC_MULLLSA_UU_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mvnz", TILE_OPC_MVNZ, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mvnz.sn", TILE_OPC_MVNZ_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mvz", TILE_OPC_MVZ, 0x5, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 31, 12, 18 }, { 0, }, { 0, } },
+  },
+  { "mvz.sn", TILE_OPC_MVZ_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mz", TILE_OPC_MZ, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "mz.sn", TILE_OPC_MZ_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mzb", TILE_OPC_MZB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mzb.sn", TILE_OPC_MZB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mzh", TILE_OPC_MZH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "mzh.sn", TILE_OPC_MZH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "nap", TILE_OPC_NAP, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "nop", TILE_OPC_NOP, 0xf, 0, TREG_ZERO, 1,
+    { {  }, {  }, {  }, {  }, { 0, } },
+  },
+  { "nor", TILE_OPC_NOR, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "nor.sn", TILE_OPC_NOR_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "or", TILE_OPC_OR, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "or.sn", TILE_OPC_OR_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "ori", TILE_OPC_ORI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "ori.sn", TILE_OPC_ORI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packbs_u", TILE_OPC_PACKBS_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packbs_u.sn", TILE_OPC_PACKBS_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packhb", TILE_OPC_PACKHB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packhb.sn", TILE_OPC_PACKHB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packhs", TILE_OPC_PACKHS, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packhs.sn", TILE_OPC_PACKHS_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packlb", TILE_OPC_PACKLB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "packlb.sn", TILE_OPC_PACKLB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "pcnt", TILE_OPC_PCNT, 0x5, 2, TREG_ZERO, 1,
+    { { 7, 8 }, { 0, }, { 11, 12 }, { 0, }, { 0, } },
+  },
+  { "pcnt.sn", TILE_OPC_PCNT_SN, 0x1, 2, TREG_SN, 1,
+    { { 7, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "rl", TILE_OPC_RL, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "rl.sn", TILE_OPC_RL_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "rli", TILE_OPC_RLI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 11, 12, 34 }, { 13, 14, 35 }, { 0, } },
+  },
+  { "rli.sn", TILE_OPC_RLI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "s1a", TILE_OPC_S1A, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "s1a.sn", TILE_OPC_S1A_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "s2a", TILE_OPC_S2A, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "s2a.sn", TILE_OPC_S2A_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "s3a", TILE_OPC_S3A, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "s3a.sn", TILE_OPC_S3A_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadab_u", TILE_OPC_SADAB_U, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadab_u.sn", TILE_OPC_SADAB_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadah", TILE_OPC_SADAH, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadah.sn", TILE_OPC_SADAH_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadah_u", TILE_OPC_SADAH_U, 0x1, 3, TREG_ZERO, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadah_u.sn", TILE_OPC_SADAH_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 21, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadb_u", TILE_OPC_SADB_U, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadb_u.sn", TILE_OPC_SADB_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadh", TILE_OPC_SADH, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadh.sn", TILE_OPC_SADH_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadh_u", TILE_OPC_SADH_U, 0x1, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sadh_u.sn", TILE_OPC_SADH_U_SN, 0x1, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sb", TILE_OPC_SB, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 17 }, { 0, }, { 0, }, { 15, 36 } },
+  },
+  { "sbadd", TILE_OPC_SBADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 24, 17, 37 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seq", TILE_OPC_SEQ, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "seq.sn", TILE_OPC_SEQ_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqb", TILE_OPC_SEQB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqb.sn", TILE_OPC_SEQB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqh", TILE_OPC_SEQH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqh.sn", TILE_OPC_SEQH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqi", TILE_OPC_SEQI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "seqi.sn", TILE_OPC_SEQI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqib", TILE_OPC_SEQIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqib.sn", TILE_OPC_SEQIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqih", TILE_OPC_SEQIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "seqih.sn", TILE_OPC_SEQIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sh", TILE_OPC_SH, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 17 }, { 0, }, { 0, }, { 15, 36 } },
+  },
+  { "shadd", TILE_OPC_SHADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 24, 17, 37 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shl", TILE_OPC_SHL, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "shl.sn", TILE_OPC_SHL_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlb", TILE_OPC_SHLB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlb.sn", TILE_OPC_SHLB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlh", TILE_OPC_SHLH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlh.sn", TILE_OPC_SHLH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shli", TILE_OPC_SHLI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 11, 12, 34 }, { 13, 14, 35 }, { 0, } },
+  },
+  { "shli.sn", TILE_OPC_SHLI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlib", TILE_OPC_SHLIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlib.sn", TILE_OPC_SHLIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlih", TILE_OPC_SHLIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shlih.sn", TILE_OPC_SHLIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shr", TILE_OPC_SHR, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "shr.sn", TILE_OPC_SHR_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrb", TILE_OPC_SHRB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrb.sn", TILE_OPC_SHRB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrh", TILE_OPC_SHRH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrh.sn", TILE_OPC_SHRH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shri", TILE_OPC_SHRI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 11, 12, 34 }, { 13, 14, 35 }, { 0, } },
+  },
+  { "shri.sn", TILE_OPC_SHRI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrib", TILE_OPC_SHRIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrib.sn", TILE_OPC_SHRIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrih", TILE_OPC_SHRIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "shrih.sn", TILE_OPC_SHRIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slt", TILE_OPC_SLT, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "slt.sn", TILE_OPC_SLT_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slt_u", TILE_OPC_SLT_U, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "slt_u.sn", TILE_OPC_SLT_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltb", TILE_OPC_SLTB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltb.sn", TILE_OPC_SLTB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltb_u", TILE_OPC_SLTB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltb_u.sn", TILE_OPC_SLTB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slte", TILE_OPC_SLTE, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "slte.sn", TILE_OPC_SLTE_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slte_u", TILE_OPC_SLTE_U, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "slte_u.sn", TILE_OPC_SLTE_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteb", TILE_OPC_SLTEB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteb.sn", TILE_OPC_SLTEB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteb_u", TILE_OPC_SLTEB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteb_u.sn", TILE_OPC_SLTEB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteh", TILE_OPC_SLTEH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteh.sn", TILE_OPC_SLTEH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteh_u", TILE_OPC_SLTEH_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slteh_u.sn", TILE_OPC_SLTEH_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slth", TILE_OPC_SLTH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slth.sn", TILE_OPC_SLTH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slth_u", TILE_OPC_SLTH_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slth_u.sn", TILE_OPC_SLTH_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slti", TILE_OPC_SLTI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "slti.sn", TILE_OPC_SLTI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "slti_u", TILE_OPC_SLTI_U, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 11, 12, 2 }, { 13, 14, 3 }, { 0, } },
+  },
+  { "slti_u.sn", TILE_OPC_SLTI_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltib", TILE_OPC_SLTIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltib.sn", TILE_OPC_SLTIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltib_u", TILE_OPC_SLTIB_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltib_u.sn", TILE_OPC_SLTIB_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltih", TILE_OPC_SLTIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltih.sn", TILE_OPC_SLTIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltih_u", TILE_OPC_SLTIH_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sltih_u.sn", TILE_OPC_SLTIH_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sne", TILE_OPC_SNE, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "sne.sn", TILE_OPC_SNE_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sneb", TILE_OPC_SNEB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sneb.sn", TILE_OPC_SNEB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sneh", TILE_OPC_SNEH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sneh.sn", TILE_OPC_SNEH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sra", TILE_OPC_SRA, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "sra.sn", TILE_OPC_SRA_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "srab", TILE_OPC_SRAB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "srab.sn", TILE_OPC_SRAB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "srah", TILE_OPC_SRAH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "srah.sn", TILE_OPC_SRAH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "srai", TILE_OPC_SRAI, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 11, 12, 34 }, { 13, 14, 35 }, { 0, } },
+  },
+  { "srai.sn", TILE_OPC_SRAI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sraib", TILE_OPC_SRAIB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sraib.sn", TILE_OPC_SRAIB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sraih", TILE_OPC_SRAIH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sraih.sn", TILE_OPC_SRAIH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 32 }, { 9, 10, 33 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sub", TILE_OPC_SUB, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "sub.sn", TILE_OPC_SUB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subb", TILE_OPC_SUBB, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subb.sn", TILE_OPC_SUBB_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subbs_u", TILE_OPC_SUBBS_U, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subbs_u.sn", TILE_OPC_SUBBS_U_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subh", TILE_OPC_SUBH, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subh.sn", TILE_OPC_SUBH_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subhs", TILE_OPC_SUBHS, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subhs.sn", TILE_OPC_SUBHS_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subs", TILE_OPC_SUBS, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "subs.sn", TILE_OPC_SUBS_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "sw", TILE_OPC_SW, 0x12, 2, TREG_ZERO, 1,
+    { { 0, }, { 10, 17 }, { 0, }, { 0, }, { 15, 36 } },
+  },
+  { "swadd", TILE_OPC_SWADD, 0x2, 3, TREG_ZERO, 1,
+    { { 0, }, { 24, 17, 37 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "swint0", TILE_OPC_SWINT0, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "swint1", TILE_OPC_SWINT1, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "swint2", TILE_OPC_SWINT2, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "swint3", TILE_OPC_SWINT3, 0x2, 0, TREG_ZERO, 0,
+    { { 0, }, {  }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tblidxb0", TILE_OPC_TBLIDXB0, 0x5, 2, TREG_ZERO, 1,
+    { { 21, 8 }, { 0, }, { 31, 12 }, { 0, }, { 0, } },
+  },
+  { "tblidxb0.sn", TILE_OPC_TBLIDXB0_SN, 0x1, 2, TREG_SN, 1,
+    { { 21, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tblidxb1", TILE_OPC_TBLIDXB1, 0x5, 2, TREG_ZERO, 1,
+    { { 21, 8 }, { 0, }, { 31, 12 }, { 0, }, { 0, } },
+  },
+  { "tblidxb1.sn", TILE_OPC_TBLIDXB1_SN, 0x1, 2, TREG_SN, 1,
+    { { 21, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tblidxb2", TILE_OPC_TBLIDXB2, 0x5, 2, TREG_ZERO, 1,
+    { { 21, 8 }, { 0, }, { 31, 12 }, { 0, }, { 0, } },
+  },
+  { "tblidxb2.sn", TILE_OPC_TBLIDXB2_SN, 0x1, 2, TREG_SN, 1,
+    { { 21, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tblidxb3", TILE_OPC_TBLIDXB3, 0x5, 2, TREG_ZERO, 1,
+    { { 21, 8 }, { 0, }, { 31, 12 }, { 0, }, { 0, } },
+  },
+  { "tblidxb3.sn", TILE_OPC_TBLIDXB3_SN, 0x1, 2, TREG_SN, 1,
+    { { 21, 8 }, { 0, }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tns", TILE_OPC_TNS, 0x2, 2, TREG_ZERO, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "tns.sn", TILE_OPC_TNS_SN, 0x2, 2, TREG_SN, 1,
+    { { 0, }, { 9, 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "wh64", TILE_OPC_WH64, 0x2, 1, TREG_ZERO, 1,
+    { { 0, }, { 10 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "xor", TILE_OPC_XOR, 0xf, 3, TREG_ZERO, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 11, 12, 18 }, { 13, 14, 19 }, { 0, } },
+  },
+  { "xor.sn", TILE_OPC_XOR_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 16 }, { 9, 10, 17 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "xori", TILE_OPC_XORI, 0x3, 3, TREG_ZERO, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { "xori.sn", TILE_OPC_XORI_SN, 0x3, 3, TREG_SN, 1,
+    { { 7, 8, 0 }, { 9, 10, 1 }, { 0, }, { 0, }, { 0, } },
+  },
+  { NULL, TILE_OPC_NONE, 0, 0, TREG_ZERO, 0, { { 0, } },
+  }
+};
+#define BITFIELD(start, size) ((start) | (((1 << (size)) - 1) << 6))
+#define CHILD(array_index) (TILE_OPC_NONE + (array_index))
+
+static const unsigned short decode_X0_fsm[1153] =
+{
+  BITFIELD(22, 9) /* index 0 */,
+  CHILD(513), CHILD(530), CHILD(547), CHILD(564), CHILD(596), CHILD(613),
+  CHILD(630), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, CHILD(663), CHILD(680), CHILD(697), CHILD(714), CHILD(746),
+  CHILD(763), CHILD(780), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813), CHILD(813),
+  CHILD(813), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828),
+  CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(828), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(873), CHILD(878), CHILD(883),
+  CHILD(903), CHILD(908), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(913),
+  CHILD(918), CHILD(923), CHILD(943), CHILD(948), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, CHILD(953), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(988), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, CHILD(993),
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, CHILD(1076), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(18, 4) /* index 513 */,
+  TILE_OPC_NONE, TILE_OPC_ADDB, TILE_OPC_ADDH, TILE_OPC_ADD,
+  TILE_OPC_ADIFFB_U, TILE_OPC_ADIFFH, TILE_OPC_AND, TILE_OPC_AVGB_U,
+  TILE_OPC_AVGH, TILE_OPC_CRC32_32, TILE_OPC_CRC32_8, TILE_OPC_INTHB,
+  TILE_OPC_INTHH, TILE_OPC_INTLB, TILE_OPC_INTLH, TILE_OPC_MAXB_U,
+  BITFIELD(18, 4) /* index 530 */,
+  TILE_OPC_MAXH, TILE_OPC_MINB_U, TILE_OPC_MINH, TILE_OPC_MNZB, TILE_OPC_MNZH,
+  TILE_OPC_MNZ, TILE_OPC_MULHHA_SS, TILE_OPC_MULHHA_SU, TILE_OPC_MULHHA_UU,
+  TILE_OPC_MULHHSA_UU, TILE_OPC_MULHH_SS, TILE_OPC_MULHH_SU,
+  TILE_OPC_MULHH_UU, TILE_OPC_MULHLA_SS, TILE_OPC_MULHLA_SU,
+  TILE_OPC_MULHLA_US,
+  BITFIELD(18, 4) /* index 547 */,
+  TILE_OPC_MULHLA_UU, TILE_OPC_MULHLSA_UU, TILE_OPC_MULHL_SS,
+  TILE_OPC_MULHL_SU, TILE_OPC_MULHL_US, TILE_OPC_MULHL_UU, TILE_OPC_MULLLA_SS,
+  TILE_OPC_MULLLA_SU, TILE_OPC_MULLLA_UU, TILE_OPC_MULLLSA_UU,
+  TILE_OPC_MULLL_SS, TILE_OPC_MULLL_SU, TILE_OPC_MULLL_UU, TILE_OPC_MVNZ,
+  TILE_OPC_MVZ, TILE_OPC_MZB,
+  BITFIELD(18, 4) /* index 564 */,
+  TILE_OPC_MZH, TILE_OPC_MZ, TILE_OPC_NOR, CHILD(581), TILE_OPC_PACKHB,
+  TILE_OPC_PACKLB, TILE_OPC_RL, TILE_OPC_S1A, TILE_OPC_S2A, TILE_OPC_S3A,
+  TILE_OPC_SADAB_U, TILE_OPC_SADAH, TILE_OPC_SADAH_U, TILE_OPC_SADB_U,
+  TILE_OPC_SADH, TILE_OPC_SADH_U,
+  BITFIELD(12, 2) /* index 581 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(586),
+  BITFIELD(14, 2) /* index 586 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(591),
+  BITFIELD(16, 2) /* index 591 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_MOVE,
+  BITFIELD(18, 4) /* index 596 */,
+  TILE_OPC_SEQB, TILE_OPC_SEQH, TILE_OPC_SEQ, TILE_OPC_SHLB, TILE_OPC_SHLH,
+  TILE_OPC_SHL, TILE_OPC_SHRB, TILE_OPC_SHRH, TILE_OPC_SHR, TILE_OPC_SLTB,
+  TILE_OPC_SLTB_U, TILE_OPC_SLTEB, TILE_OPC_SLTEB_U, TILE_OPC_SLTEH,
+  TILE_OPC_SLTEH_U, TILE_OPC_SLTE,
+  BITFIELD(18, 4) /* index 613 */,
+  TILE_OPC_SLTE_U, TILE_OPC_SLTH, TILE_OPC_SLTH_U, TILE_OPC_SLT,
+  TILE_OPC_SLT_U, TILE_OPC_SNEB, TILE_OPC_SNEH, TILE_OPC_SNE, TILE_OPC_SRAB,
+  TILE_OPC_SRAH, TILE_OPC_SRA, TILE_OPC_SUBB, TILE_OPC_SUBH, TILE_OPC_SUB,
+  TILE_OPC_XOR, TILE_OPC_DWORD_ALIGN,
+  BITFIELD(18, 3) /* index 630 */,
+  CHILD(639), CHILD(642), CHILD(645), CHILD(648), CHILD(651), CHILD(654),
+  CHILD(657), CHILD(660),
+  BITFIELD(21, 1) /* index 639 */,
+  TILE_OPC_ADDS, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 642 */,
+  TILE_OPC_SUBS, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 645 */,
+  TILE_OPC_ADDBS_U, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 648 */,
+  TILE_OPC_ADDHS, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 651 */,
+  TILE_OPC_SUBBS_U, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 654 */,
+  TILE_OPC_SUBHS, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 657 */,
+  TILE_OPC_PACKHS, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 660 */,
+  TILE_OPC_PACKBS_U, TILE_OPC_NONE,
+  BITFIELD(18, 4) /* index 663 */,
+  TILE_OPC_NONE, TILE_OPC_ADDB_SN, TILE_OPC_ADDH_SN, TILE_OPC_ADD_SN,
+  TILE_OPC_ADIFFB_U_SN, TILE_OPC_ADIFFH_SN, TILE_OPC_AND_SN,
+  TILE_OPC_AVGB_U_SN, TILE_OPC_AVGH_SN, TILE_OPC_CRC32_32_SN,
+  TILE_OPC_CRC32_8_SN, TILE_OPC_INTHB_SN, TILE_OPC_INTHH_SN,
+  TILE_OPC_INTLB_SN, TILE_OPC_INTLH_SN, TILE_OPC_MAXB_U_SN,
+  BITFIELD(18, 4) /* index 680 */,
+  TILE_OPC_MAXH_SN, TILE_OPC_MINB_U_SN, TILE_OPC_MINH_SN, TILE_OPC_MNZB_SN,
+  TILE_OPC_MNZH_SN, TILE_OPC_MNZ_SN, TILE_OPC_MULHHA_SS_SN,
+  TILE_OPC_MULHHA_SU_SN, TILE_OPC_MULHHA_UU_SN, TILE_OPC_MULHHSA_UU_SN,
+  TILE_OPC_MULHH_SS_SN, TILE_OPC_MULHH_SU_SN, TILE_OPC_MULHH_UU_SN,
+  TILE_OPC_MULHLA_SS_SN, TILE_OPC_MULHLA_SU_SN, TILE_OPC_MULHLA_US_SN,
+  BITFIELD(18, 4) /* index 697 */,
+  TILE_OPC_MULHLA_UU_SN, TILE_OPC_MULHLSA_UU_SN, TILE_OPC_MULHL_SS_SN,
+  TILE_OPC_MULHL_SU_SN, TILE_OPC_MULHL_US_SN, TILE_OPC_MULHL_UU_SN,
+  TILE_OPC_MULLLA_SS_SN, TILE_OPC_MULLLA_SU_SN, TILE_OPC_MULLLA_UU_SN,
+  TILE_OPC_MULLLSA_UU_SN, TILE_OPC_MULLL_SS_SN, TILE_OPC_MULLL_SU_SN,
+  TILE_OPC_MULLL_UU_SN, TILE_OPC_MVNZ_SN, TILE_OPC_MVZ_SN, TILE_OPC_MZB_SN,
+  BITFIELD(18, 4) /* index 714 */,
+  TILE_OPC_MZH_SN, TILE_OPC_MZ_SN, TILE_OPC_NOR_SN, CHILD(731),
+  TILE_OPC_PACKHB_SN, TILE_OPC_PACKLB_SN, TILE_OPC_RL_SN, TILE_OPC_S1A_SN,
+  TILE_OPC_S2A_SN, TILE_OPC_S3A_SN, TILE_OPC_SADAB_U_SN, TILE_OPC_SADAH_SN,
+  TILE_OPC_SADAH_U_SN, TILE_OPC_SADB_U_SN, TILE_OPC_SADH_SN,
+  TILE_OPC_SADH_U_SN,
+  BITFIELD(12, 2) /* index 731 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, CHILD(736),
+  BITFIELD(14, 2) /* index 736 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, CHILD(741),
+  BITFIELD(16, 2) /* index 741 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_MOVE_SN,
+  BITFIELD(18, 4) /* index 746 */,
+  TILE_OPC_SEQB_SN, TILE_OPC_SEQH_SN, TILE_OPC_SEQ_SN, TILE_OPC_SHLB_SN,
+  TILE_OPC_SHLH_SN, TILE_OPC_SHL_SN, TILE_OPC_SHRB_SN, TILE_OPC_SHRH_SN,
+  TILE_OPC_SHR_SN, TILE_OPC_SLTB_SN, TILE_OPC_SLTB_U_SN, TILE_OPC_SLTEB_SN,
+  TILE_OPC_SLTEB_U_SN, TILE_OPC_SLTEH_SN, TILE_OPC_SLTEH_U_SN,
+  TILE_OPC_SLTE_SN,
+  BITFIELD(18, 4) /* index 763 */,
+  TILE_OPC_SLTE_U_SN, TILE_OPC_SLTH_SN, TILE_OPC_SLTH_U_SN, TILE_OPC_SLT_SN,
+  TILE_OPC_SLT_U_SN, TILE_OPC_SNEB_SN, TILE_OPC_SNEH_SN, TILE_OPC_SNE_SN,
+  TILE_OPC_SRAB_SN, TILE_OPC_SRAH_SN, TILE_OPC_SRA_SN, TILE_OPC_SUBB_SN,
+  TILE_OPC_SUBH_SN, TILE_OPC_SUB_SN, TILE_OPC_XOR_SN, TILE_OPC_DWORD_ALIGN_SN,
+  BITFIELD(18, 3) /* index 780 */,
+  CHILD(789), CHILD(792), CHILD(795), CHILD(798), CHILD(801), CHILD(804),
+  CHILD(807), CHILD(810),
+  BITFIELD(21, 1) /* index 789 */,
+  TILE_OPC_ADDS_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 792 */,
+  TILE_OPC_SUBS_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 795 */,
+  TILE_OPC_ADDBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 798 */,
+  TILE_OPC_ADDHS_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 801 */,
+  TILE_OPC_SUBBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 804 */,
+  TILE_OPC_SUBHS_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 807 */,
+  TILE_OPC_PACKHS_SN, TILE_OPC_NONE,
+  BITFIELD(21, 1) /* index 810 */,
+  TILE_OPC_PACKBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(6, 2) /* index 813 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, CHILD(818),
+  BITFIELD(8, 2) /* index 818 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, CHILD(823),
+  BITFIELD(10, 2) /* index 823 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_MOVELI_SN,
+  BITFIELD(6, 2) /* index 828 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, CHILD(833),
+  BITFIELD(8, 2) /* index 833 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, CHILD(838),
+  BITFIELD(10, 2) /* index 838 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_MOVELI,
+  BITFIELD(0, 2) /* index 843 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(848),
+  BITFIELD(2, 2) /* index 848 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(853),
+  BITFIELD(4, 2) /* index 853 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(858),
+  BITFIELD(6, 2) /* index 858 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(863),
+  BITFIELD(8, 2) /* index 863 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(868),
+  BITFIELD(10, 2) /* index 868 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_INFOL,
+  BITFIELD(20, 2) /* index 873 */,
+  TILE_OPC_NONE, TILE_OPC_ADDIB, TILE_OPC_ADDIH, TILE_OPC_ADDI,
+  BITFIELD(20, 2) /* index 878 */,
+  TILE_OPC_MAXIB_U, TILE_OPC_MAXIH, TILE_OPC_MINIB_U, TILE_OPC_MINIH,
+  BITFIELD(20, 2) /* index 883 */,
+  CHILD(888), TILE_OPC_SEQIB, TILE_OPC_SEQIH, TILE_OPC_SEQI,
+  BITFIELD(6, 2) /* index 888 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(893),
+  BITFIELD(8, 2) /* index 893 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(898),
+  BITFIELD(10, 2) /* index 898 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_MOVEI,
+  BITFIELD(20, 2) /* index 903 */,
+  TILE_OPC_SLTIB, TILE_OPC_SLTIB_U, TILE_OPC_SLTIH, TILE_OPC_SLTIH_U,
+  BITFIELD(20, 2) /* index 908 */,
+  TILE_OPC_SLTI, TILE_OPC_SLTI_U, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(20, 2) /* index 913 */,
+  TILE_OPC_NONE, TILE_OPC_ADDIB_SN, TILE_OPC_ADDIH_SN, TILE_OPC_ADDI_SN,
+  BITFIELD(20, 2) /* index 918 */,
+  TILE_OPC_MAXIB_U_SN, TILE_OPC_MAXIH_SN, TILE_OPC_MINIB_U_SN,
+  TILE_OPC_MINIH_SN,
+  BITFIELD(20, 2) /* index 923 */,
+  CHILD(928), TILE_OPC_SEQIB_SN, TILE_OPC_SEQIH_SN, TILE_OPC_SEQI_SN,
+  BITFIELD(6, 2) /* index 928 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, CHILD(933),
+  BITFIELD(8, 2) /* index 933 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, CHILD(938),
+  BITFIELD(10, 2) /* index 938 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_MOVEI_SN,
+  BITFIELD(20, 2) /* index 943 */,
+  TILE_OPC_SLTIB_SN, TILE_OPC_SLTIB_U_SN, TILE_OPC_SLTIH_SN,
+  TILE_OPC_SLTIH_U_SN,
+  BITFIELD(20, 2) /* index 948 */,
+  TILE_OPC_SLTI_SN, TILE_OPC_SLTI_U_SN, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(20, 2) /* index 953 */,
+  TILE_OPC_NONE, CHILD(958), TILE_OPC_XORI, TILE_OPC_NONE,
+  BITFIELD(0, 2) /* index 958 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(963),
+  BITFIELD(2, 2) /* index 963 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(968),
+  BITFIELD(4, 2) /* index 968 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(973),
+  BITFIELD(6, 2) /* index 973 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(978),
+  BITFIELD(8, 2) /* index 978 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(983),
+  BITFIELD(10, 2) /* index 983 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_INFO,
+  BITFIELD(20, 2) /* index 988 */,
+  TILE_OPC_NONE, TILE_OPC_ANDI_SN, TILE_OPC_XORI_SN, TILE_OPC_NONE,
+  BITFIELD(17, 5) /* index 993 */,
+  TILE_OPC_NONE, TILE_OPC_RLI, TILE_OPC_SHLIB, TILE_OPC_SHLIH, TILE_OPC_SHLI,
+  TILE_OPC_SHRIB, TILE_OPC_SHRIH, TILE_OPC_SHRI, TILE_OPC_SRAIB,
+  TILE_OPC_SRAIH, TILE_OPC_SRAI, CHILD(1026), TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(12, 4) /* index 1026 */,
+  TILE_OPC_NONE, CHILD(1043), CHILD(1046), CHILD(1049), CHILD(1052),
+  CHILD(1055), CHILD(1058), CHILD(1061), CHILD(1064), CHILD(1067),
+  CHILD(1070), CHILD(1073), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1043 */,
+  TILE_OPC_BITX, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1046 */,
+  TILE_OPC_BYTEX, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1049 */,
+  TILE_OPC_CLZ, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1052 */,
+  TILE_OPC_CTZ, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1055 */,
+  TILE_OPC_FNOP, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1058 */,
+  TILE_OPC_NOP, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1061 */,
+  TILE_OPC_PCNT, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1064 */,
+  TILE_OPC_TBLIDXB0, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1067 */,
+  TILE_OPC_TBLIDXB1, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1070 */,
+  TILE_OPC_TBLIDXB2, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1073 */,
+  TILE_OPC_TBLIDXB3, TILE_OPC_NONE,
+  BITFIELD(17, 5) /* index 1076 */,
+  TILE_OPC_NONE, TILE_OPC_RLI_SN, TILE_OPC_SHLIB_SN, TILE_OPC_SHLIH_SN,
+  TILE_OPC_SHLI_SN, TILE_OPC_SHRIB_SN, TILE_OPC_SHRIH_SN, TILE_OPC_SHRI_SN,
+  TILE_OPC_SRAIB_SN, TILE_OPC_SRAIH_SN, TILE_OPC_SRAI_SN, CHILD(1109),
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(12, 4) /* index 1109 */,
+  TILE_OPC_NONE, CHILD(1126), CHILD(1129), CHILD(1132), CHILD(1135),
+  CHILD(1055), CHILD(1058), CHILD(1138), CHILD(1141), CHILD(1144),
+  CHILD(1147), CHILD(1150), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1126 */,
+  TILE_OPC_BITX_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1129 */,
+  TILE_OPC_BYTEX_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1132 */,
+  TILE_OPC_CLZ_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1135 */,
+  TILE_OPC_CTZ_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1138 */,
+  TILE_OPC_PCNT_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1141 */,
+  TILE_OPC_TBLIDXB0_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1144 */,
+  TILE_OPC_TBLIDXB1_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1147 */,
+  TILE_OPC_TBLIDXB2_SN, TILE_OPC_NONE,
+  BITFIELD(16, 1) /* index 1150 */,
+  TILE_OPC_TBLIDXB3_SN, TILE_OPC_NONE,
+};
+
+static const unsigned short decode_X1_fsm[1540] =
+{
+  BITFIELD(54, 9) /* index 0 */,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, CHILD(513), CHILD(561), CHILD(594),
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(641), CHILD(689),
+  CHILD(722), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(766),
+  CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766),
+  CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766),
+  CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766),
+  CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766),
+  CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766), CHILD(766),
+  CHILD(766), CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781),
+  CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781),
+  CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781),
+  CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781),
+  CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781), CHILD(781),
+  CHILD(781), CHILD(781), CHILD(781), CHILD(796), CHILD(796), CHILD(796),
+  CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796),
+  CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796),
+  CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796),
+  CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796),
+  CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(796), CHILD(826),
+  CHILD(826), CHILD(826), CHILD(826), CHILD(826), CHILD(826), CHILD(826),
+  CHILD(826), CHILD(826), CHILD(826), CHILD(826), CHILD(826), CHILD(826),
+  CHILD(826), CHILD(826), CHILD(826), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843), CHILD(843),
+  CHILD(843), CHILD(860), CHILD(899), CHILD(923), CHILD(932), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, CHILD(941), CHILD(950), CHILD(974), CHILD(983),
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM,
+  TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, TILE_OPC_MM, CHILD(992),
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  CHILD(1334), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J, TILE_OPC_J,
+  TILE_OPC_J, TILE_OPC_J, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL, TILE_OPC_JAL,
+  TILE_OPC_JAL, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(49, 5) /* index 513 */,
+  TILE_OPC_NONE, TILE_OPC_ADDB, TILE_OPC_ADDH, TILE_OPC_ADD, TILE_OPC_AND,
+  TILE_OPC_INTHB, TILE_OPC_INTHH, TILE_OPC_INTLB, TILE_OPC_INTLH,
+  TILE_OPC_JALRP, TILE_OPC_JALR, TILE_OPC_JRP, TILE_OPC_JR, TILE_OPC_LNK,
+  TILE_OPC_MAXB_U, TILE_OPC_MAXH, TILE_OPC_MINB_U, TILE_OPC_MINH,
+  TILE_OPC_MNZB, TILE_OPC_MNZH, TILE_OPC_MNZ, TILE_OPC_MZB, TILE_OPC_MZH,
+  TILE_OPC_MZ, TILE_OPC_NOR, CHILD(546), TILE_OPC_PACKHB, TILE_OPC_PACKLB,
+  TILE_OPC_RL, TILE_OPC_S1A, TILE_OPC_S2A, TILE_OPC_S3A,
+  BITFIELD(43, 2) /* index 546 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(551),
+  BITFIELD(45, 2) /* index 551 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(556),
+  BITFIELD(47, 2) /* index 556 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_MOVE,
+  BITFIELD(49, 5) /* index 561 */,
+  TILE_OPC_SB, TILE_OPC_SEQB, TILE_OPC_SEQH, TILE_OPC_SEQ, TILE_OPC_SHLB,
+  TILE_OPC_SHLH, TILE_OPC_SHL, TILE_OPC_SHRB, TILE_OPC_SHRH, TILE_OPC_SHR,
+  TILE_OPC_SH, TILE_OPC_SLTB, TILE_OPC_SLTB_U, TILE_OPC_SLTEB,
+  TILE_OPC_SLTEB_U, TILE_OPC_SLTEH, TILE_OPC_SLTEH_U, TILE_OPC_SLTE,
+  TILE_OPC_SLTE_U, TILE_OPC_SLTH, TILE_OPC_SLTH_U, TILE_OPC_SLT,
+  TILE_OPC_SLT_U, TILE_OPC_SNEB, TILE_OPC_SNEH, TILE_OPC_SNE, TILE_OPC_SRAB,
+  TILE_OPC_SRAH, TILE_OPC_SRA, TILE_OPC_SUBB, TILE_OPC_SUBH, TILE_OPC_SUB,
+  BITFIELD(49, 4) /* index 594 */,
+  CHILD(611), CHILD(614), CHILD(617), CHILD(620), CHILD(623), CHILD(626),
+  CHILD(629), CHILD(632), CHILD(635), CHILD(638), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 611 */,
+  TILE_OPC_SW, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 614 */,
+  TILE_OPC_XOR, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 617 */,
+  TILE_OPC_ADDS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 620 */,
+  TILE_OPC_SUBS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 623 */,
+  TILE_OPC_ADDBS_U, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 626 */,
+  TILE_OPC_ADDHS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 629 */,
+  TILE_OPC_SUBBS_U, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 632 */,
+  TILE_OPC_SUBHS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 635 */,
+  TILE_OPC_PACKHS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 638 */,
+  TILE_OPC_PACKBS_U, TILE_OPC_NONE,
+  BITFIELD(49, 5) /* index 641 */,
+  TILE_OPC_NONE, TILE_OPC_ADDB_SN, TILE_OPC_ADDH_SN, TILE_OPC_ADD_SN,
+  TILE_OPC_AND_SN, TILE_OPC_INTHB_SN, TILE_OPC_INTHH_SN, TILE_OPC_INTLB_SN,
+  TILE_OPC_INTLH_SN, TILE_OPC_JALRP, TILE_OPC_JALR, TILE_OPC_JRP, TILE_OPC_JR,
+  TILE_OPC_LNK_SN, TILE_OPC_MAXB_U_SN, TILE_OPC_MAXH_SN, TILE_OPC_MINB_U_SN,
+  TILE_OPC_MINH_SN, TILE_OPC_MNZB_SN, TILE_OPC_MNZH_SN, TILE_OPC_MNZ_SN,
+  TILE_OPC_MZB_SN, TILE_OPC_MZH_SN, TILE_OPC_MZ_SN, TILE_OPC_NOR_SN,
+  CHILD(674), TILE_OPC_PACKHB_SN, TILE_OPC_PACKLB_SN, TILE_OPC_RL_SN,
+  TILE_OPC_S1A_SN, TILE_OPC_S2A_SN, TILE_OPC_S3A_SN,
+  BITFIELD(43, 2) /* index 674 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, CHILD(679),
+  BITFIELD(45, 2) /* index 679 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, CHILD(684),
+  BITFIELD(47, 2) /* index 684 */,
+  TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_OR_SN, TILE_OPC_MOVE_SN,
+  BITFIELD(49, 5) /* index 689 */,
+  TILE_OPC_SB, TILE_OPC_SEQB_SN, TILE_OPC_SEQH_SN, TILE_OPC_SEQ_SN,
+  TILE_OPC_SHLB_SN, TILE_OPC_SHLH_SN, TILE_OPC_SHL_SN, TILE_OPC_SHRB_SN,
+  TILE_OPC_SHRH_SN, TILE_OPC_SHR_SN, TILE_OPC_SH, TILE_OPC_SLTB_SN,
+  TILE_OPC_SLTB_U_SN, TILE_OPC_SLTEB_SN, TILE_OPC_SLTEB_U_SN,
+  TILE_OPC_SLTEH_SN, TILE_OPC_SLTEH_U_SN, TILE_OPC_SLTE_SN,
+  TILE_OPC_SLTE_U_SN, TILE_OPC_SLTH_SN, TILE_OPC_SLTH_U_SN, TILE_OPC_SLT_SN,
+  TILE_OPC_SLT_U_SN, TILE_OPC_SNEB_SN, TILE_OPC_SNEH_SN, TILE_OPC_SNE_SN,
+  TILE_OPC_SRAB_SN, TILE_OPC_SRAH_SN, TILE_OPC_SRA_SN, TILE_OPC_SUBB_SN,
+  TILE_OPC_SUBH_SN, TILE_OPC_SUB_SN,
+  BITFIELD(49, 4) /* index 722 */,
+  CHILD(611), CHILD(739), CHILD(742), CHILD(745), CHILD(748), CHILD(751),
+  CHILD(754), CHILD(757), CHILD(760), CHILD(763), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 739 */,
+  TILE_OPC_XOR_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 742 */,
+  TILE_OPC_ADDS_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 745 */,
+  TILE_OPC_SUBS_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 748 */,
+  TILE_OPC_ADDBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 751 */,
+  TILE_OPC_ADDHS_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 754 */,
+  TILE_OPC_SUBBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 757 */,
+  TILE_OPC_SUBHS_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 760 */,
+  TILE_OPC_PACKHS_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 763 */,
+  TILE_OPC_PACKBS_U_SN, TILE_OPC_NONE,
+  BITFIELD(37, 2) /* index 766 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, CHILD(771),
+  BITFIELD(39, 2) /* index 771 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, CHILD(776),
+  BITFIELD(41, 2) /* index 776 */,
+  TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_ADDLI_SN, TILE_OPC_MOVELI_SN,
+  BITFIELD(37, 2) /* index 781 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, CHILD(786),
+  BITFIELD(39, 2) /* index 786 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, CHILD(791),
+  BITFIELD(41, 2) /* index 791 */,
+  TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_ADDLI, TILE_OPC_MOVELI,
+  BITFIELD(31, 2) /* index 796 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(801),
+  BITFIELD(33, 2) /* index 801 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(806),
+  BITFIELD(35, 2) /* index 806 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(811),
+  BITFIELD(37, 2) /* index 811 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(816),
+  BITFIELD(39, 2) /* index 816 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, CHILD(821),
+  BITFIELD(41, 2) /* index 821 */,
+  TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_AULI, TILE_OPC_INFOL,
+  BITFIELD(31, 4) /* index 826 */,
+  TILE_OPC_BZ, TILE_OPC_BZT, TILE_OPC_BNZ, TILE_OPC_BNZT, TILE_OPC_BGZ,
+  TILE_OPC_BGZT, TILE_OPC_BGEZ, TILE_OPC_BGEZT, TILE_OPC_BLZ, TILE_OPC_BLZT,
+  TILE_OPC_BLEZ, TILE_OPC_BLEZT, TILE_OPC_BBS, TILE_OPC_BBST, TILE_OPC_BBNS,
+  TILE_OPC_BBNST,
+  BITFIELD(31, 4) /* index 843 */,
+  TILE_OPC_BZ_SN, TILE_OPC_BZT_SN, TILE_OPC_BNZ_SN, TILE_OPC_BNZT_SN,
+  TILE_OPC_BGZ_SN, TILE_OPC_BGZT_SN, TILE_OPC_BGEZ_SN, TILE_OPC_BGEZT_SN,
+  TILE_OPC_BLZ_SN, TILE_OPC_BLZT_SN, TILE_OPC_BLEZ_SN, TILE_OPC_BLEZT_SN,
+  TILE_OPC_BBS_SN, TILE_OPC_BBST_SN, TILE_OPC_BBNS_SN, TILE_OPC_BBNST_SN,
+  BITFIELD(51, 3) /* index 860 */,
+  TILE_OPC_NONE, TILE_OPC_ADDIB, TILE_OPC_ADDIH, TILE_OPC_ADDI, CHILD(869),
+  TILE_OPC_MAXIB_U, TILE_OPC_MAXIH, TILE_OPC_MFSPR,
+  BITFIELD(31, 2) /* index 869 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(874),
+  BITFIELD(33, 2) /* index 874 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(879),
+  BITFIELD(35, 2) /* index 879 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(884),
+  BITFIELD(37, 2) /* index 884 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(889),
+  BITFIELD(39, 2) /* index 889 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(894),
+  BITFIELD(41, 2) /* index 894 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_INFO,
+  BITFIELD(51, 3) /* index 899 */,
+  TILE_OPC_MINIB_U, TILE_OPC_MINIH, TILE_OPC_MTSPR, CHILD(908),
+  TILE_OPC_SEQIB, TILE_OPC_SEQIH, TILE_OPC_SEQI, TILE_OPC_SLTIB,
+  BITFIELD(37, 2) /* index 908 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(913),
+  BITFIELD(39, 2) /* index 913 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(918),
+  BITFIELD(41, 2) /* index 918 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_MOVEI,
+  BITFIELD(51, 3) /* index 923 */,
+  TILE_OPC_SLTIB_U, TILE_OPC_SLTIH, TILE_OPC_SLTIH_U, TILE_OPC_SLTI,
+  TILE_OPC_SLTI_U, TILE_OPC_XORI, TILE_OPC_LBADD, TILE_OPC_LBADD_U,
+  BITFIELD(51, 3) /* index 932 */,
+  TILE_OPC_LHADD, TILE_OPC_LHADD_U, TILE_OPC_LWADD, TILE_OPC_LWADD_NA,
+  TILE_OPC_SBADD, TILE_OPC_SHADD, TILE_OPC_SWADD, TILE_OPC_NONE,
+  BITFIELD(51, 3) /* index 941 */,
+  TILE_OPC_NONE, TILE_OPC_ADDIB_SN, TILE_OPC_ADDIH_SN, TILE_OPC_ADDI_SN,
+  TILE_OPC_ANDI_SN, TILE_OPC_MAXIB_U_SN, TILE_OPC_MAXIH_SN, TILE_OPC_MFSPR,
+  BITFIELD(51, 3) /* index 950 */,
+  TILE_OPC_MINIB_U_SN, TILE_OPC_MINIH_SN, TILE_OPC_MTSPR, CHILD(959),
+  TILE_OPC_SEQIB_SN, TILE_OPC_SEQIH_SN, TILE_OPC_SEQI_SN, TILE_OPC_SLTIB_SN,
+  BITFIELD(37, 2) /* index 959 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, CHILD(964),
+  BITFIELD(39, 2) /* index 964 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, CHILD(969),
+  BITFIELD(41, 2) /* index 969 */,
+  TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_ORI_SN, TILE_OPC_MOVEI_SN,
+  BITFIELD(51, 3) /* index 974 */,
+  TILE_OPC_SLTIB_U_SN, TILE_OPC_SLTIH_SN, TILE_OPC_SLTIH_U_SN,
+  TILE_OPC_SLTI_SN, TILE_OPC_SLTI_U_SN, TILE_OPC_XORI_SN, TILE_OPC_LBADD_SN,
+  TILE_OPC_LBADD_U_SN,
+  BITFIELD(51, 3) /* index 983 */,
+  TILE_OPC_LHADD_SN, TILE_OPC_LHADD_U_SN, TILE_OPC_LWADD_SN,
+  TILE_OPC_LWADD_NA_SN, TILE_OPC_SBADD, TILE_OPC_SHADD, TILE_OPC_SWADD,
+  TILE_OPC_NONE,
+  BITFIELD(46, 7) /* index 992 */,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(1121),
+  CHILD(1121), CHILD(1121), CHILD(1121), CHILD(1124), CHILD(1124),
+  CHILD(1124), CHILD(1124), CHILD(1127), CHILD(1127), CHILD(1127),
+  CHILD(1127), CHILD(1130), CHILD(1130), CHILD(1130), CHILD(1130),
+  CHILD(1133), CHILD(1133), CHILD(1133), CHILD(1133), CHILD(1136),
+  CHILD(1136), CHILD(1136), CHILD(1136), CHILD(1139), CHILD(1139),
+  CHILD(1139), CHILD(1139), CHILD(1142), CHILD(1142), CHILD(1142),
+  CHILD(1142), CHILD(1145), CHILD(1145), CHILD(1145), CHILD(1145),
+  CHILD(1148), CHILD(1148), CHILD(1148), CHILD(1148), CHILD(1151),
+  CHILD(1242), CHILD(1290), CHILD(1323), TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1121 */,
+  TILE_OPC_RLI, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1124 */,
+  TILE_OPC_SHLIB, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1127 */,
+  TILE_OPC_SHLIH, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1130 */,
+  TILE_OPC_SHLI, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1133 */,
+  TILE_OPC_SHRIB, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1136 */,
+  TILE_OPC_SHRIH, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1139 */,
+  TILE_OPC_SHRI, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1142 */,
+  TILE_OPC_SRAIB, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1145 */,
+  TILE_OPC_SRAIH, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1148 */,
+  TILE_OPC_SRAI, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 1151 */,
+  TILE_OPC_NONE, CHILD(1160), CHILD(1163), CHILD(1166), CHILD(1169),
+  CHILD(1172), CHILD(1175), CHILD(1178),
+  BITFIELD(53, 1) /* index 1160 */,
+  TILE_OPC_DRAIN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1163 */,
+  TILE_OPC_DTLBPR, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1166 */,
+  TILE_OPC_FINV, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1169 */,
+  TILE_OPC_FLUSH, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1172 */,
+  TILE_OPC_FNOP, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1175 */,
+  TILE_OPC_ICOH, TILE_OPC_NONE,
+  BITFIELD(31, 2) /* index 1178 */,
+  CHILD(1183), CHILD(1211), CHILD(1239), CHILD(1239),
+  BITFIELD(53, 1) /* index 1183 */,
+  CHILD(1186), TILE_OPC_NONE,
+  BITFIELD(33, 2) /* index 1186 */,
+  TILE_OPC_ILL, TILE_OPC_ILL, TILE_OPC_ILL, CHILD(1191),
+  BITFIELD(35, 2) /* index 1191 */,
+  TILE_OPC_ILL, CHILD(1196), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(37, 2) /* index 1196 */,
+  TILE_OPC_ILL, CHILD(1201), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(39, 2) /* index 1201 */,
+  TILE_OPC_ILL, CHILD(1206), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(41, 2) /* index 1206 */,
+  TILE_OPC_ILL, TILE_OPC_ILL, TILE_OPC_BPT, TILE_OPC_ILL,
+  BITFIELD(53, 1) /* index 1211 */,
+  CHILD(1214), TILE_OPC_NONE,
+  BITFIELD(33, 2) /* index 1214 */,
+  TILE_OPC_ILL, TILE_OPC_ILL, TILE_OPC_ILL, CHILD(1219),
+  BITFIELD(35, 2) /* index 1219 */,
+  TILE_OPC_ILL, CHILD(1224), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(37, 2) /* index 1224 */,
+  TILE_OPC_ILL, CHILD(1229), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(39, 2) /* index 1229 */,
+  TILE_OPC_ILL, CHILD(1234), TILE_OPC_ILL, TILE_OPC_ILL,
+  BITFIELD(41, 2) /* index 1234 */,
+  TILE_OPC_ILL, TILE_OPC_ILL, TILE_OPC_RAISE, TILE_OPC_ILL,
+  BITFIELD(53, 1) /* index 1239 */,
+  TILE_OPC_ILL, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 1242 */,
+  CHILD(1251), CHILD(1254), CHILD(1257), CHILD(1275), CHILD(1278),
+  CHILD(1281), CHILD(1284), CHILD(1287),
+  BITFIELD(53, 1) /* index 1251 */,
+  TILE_OPC_INV, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1254 */,
+  TILE_OPC_IRET, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1257 */,
+  CHILD(1260), TILE_OPC_NONE,
+  BITFIELD(31, 2) /* index 1260 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, CHILD(1265),
+  BITFIELD(33, 2) /* index 1265 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, CHILD(1270),
+  BITFIELD(35, 2) /* index 1270 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_PREFETCH,
+  BITFIELD(53, 1) /* index 1275 */,
+  TILE_OPC_LB_U, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1278 */,
+  TILE_OPC_LH, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1281 */,
+  TILE_OPC_LH_U, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1284 */,
+  TILE_OPC_LW, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1287 */,
+  TILE_OPC_MF, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 1290 */,
+  CHILD(1299), CHILD(1302), CHILD(1305), CHILD(1308), CHILD(1311),
+  CHILD(1314), CHILD(1317), CHILD(1320),
+  BITFIELD(53, 1) /* index 1299 */,
+  TILE_OPC_NAP, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1302 */,
+  TILE_OPC_NOP, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1305 */,
+  TILE_OPC_SWINT0, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1308 */,
+  TILE_OPC_SWINT1, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1311 */,
+  TILE_OPC_SWINT2, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1314 */,
+  TILE_OPC_SWINT3, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1317 */,
+  TILE_OPC_TNS, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1320 */,
+  TILE_OPC_WH64, TILE_OPC_NONE,
+  BITFIELD(43, 2) /* index 1323 */,
+  CHILD(1328), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(45, 1) /* index 1328 */,
+  CHILD(1331), TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1331 */,
+  TILE_OPC_LW_NA, TILE_OPC_NONE,
+  BITFIELD(46, 7) /* index 1334 */,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, CHILD(1463),
+  CHILD(1463), CHILD(1463), CHILD(1463), CHILD(1466), CHILD(1466),
+  CHILD(1466), CHILD(1466), CHILD(1469), CHILD(1469), CHILD(1469),
+  CHILD(1469), CHILD(1472), CHILD(1472), CHILD(1472), CHILD(1472),
+  CHILD(1475), CHILD(1475), CHILD(1475), CHILD(1475), CHILD(1478),
+  CHILD(1478), CHILD(1478), CHILD(1478), CHILD(1481), CHILD(1481),
+  CHILD(1481), CHILD(1481), CHILD(1484), CHILD(1484), CHILD(1484),
+  CHILD(1484), CHILD(1487), CHILD(1487), CHILD(1487), CHILD(1487),
+  CHILD(1490), CHILD(1490), CHILD(1490), CHILD(1490), CHILD(1151),
+  CHILD(1493), CHILD(1517), CHILD(1529), TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1463 */,
+  TILE_OPC_RLI_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1466 */,
+  TILE_OPC_SHLIB_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1469 */,
+  TILE_OPC_SHLIH_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1472 */,
+  TILE_OPC_SHLI_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1475 */,
+  TILE_OPC_SHRIB_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1478 */,
+  TILE_OPC_SHRIH_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1481 */,
+  TILE_OPC_SHRI_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1484 */,
+  TILE_OPC_SRAIB_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1487 */,
+  TILE_OPC_SRAIH_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1490 */,
+  TILE_OPC_SRAI_SN, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 1493 */,
+  CHILD(1251), CHILD(1254), CHILD(1502), CHILD(1505), CHILD(1508),
+  CHILD(1511), CHILD(1514), CHILD(1287),
+  BITFIELD(53, 1) /* index 1502 */,
+  TILE_OPC_LB_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1505 */,
+  TILE_OPC_LB_U_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1508 */,
+  TILE_OPC_LH_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1511 */,
+  TILE_OPC_LH_U_SN, TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1514 */,
+  TILE_OPC_LW_SN, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 1517 */,
+  CHILD(1299), CHILD(1302), CHILD(1305), CHILD(1308), CHILD(1311),
+  CHILD(1314), CHILD(1526), CHILD(1320),
+  BITFIELD(53, 1) /* index 1526 */,
+  TILE_OPC_TNS_SN, TILE_OPC_NONE,
+  BITFIELD(43, 2) /* index 1529 */,
+  CHILD(1534), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(45, 1) /* index 1534 */,
+  CHILD(1537), TILE_OPC_NONE,
+  BITFIELD(53, 1) /* index 1537 */,
+  TILE_OPC_LW_NA_SN, TILE_OPC_NONE,
+};
+
+static const unsigned short decode_Y0_fsm[168] =
+{
+  BITFIELD(27, 4) /* index 0 */,
+  TILE_OPC_NONE, CHILD(17), CHILD(22), CHILD(27), CHILD(47), CHILD(52),
+  CHILD(57), CHILD(62), CHILD(67), TILE_OPC_ADDI, CHILD(72), CHILD(102),
+  TILE_OPC_SEQI, CHILD(117), TILE_OPC_SLTI, TILE_OPC_SLTI_U,
+  BITFIELD(18, 2) /* index 17 */,
+  TILE_OPC_ADD, TILE_OPC_S1A, TILE_OPC_S2A, TILE_OPC_SUB,
+  BITFIELD(18, 2) /* index 22 */,
+  TILE_OPC_MNZ, TILE_OPC_MVNZ, TILE_OPC_MVZ, TILE_OPC_MZ,
+  BITFIELD(18, 2) /* index 27 */,
+  TILE_OPC_AND, TILE_OPC_NOR, CHILD(32), TILE_OPC_XOR,
+  BITFIELD(12, 2) /* index 32 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(37),
+  BITFIELD(14, 2) /* index 37 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(42),
+  BITFIELD(16, 2) /* index 42 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_MOVE,
+  BITFIELD(18, 2) /* index 47 */,
+  TILE_OPC_RL, TILE_OPC_SHL, TILE_OPC_SHR, TILE_OPC_SRA,
+  BITFIELD(18, 2) /* index 52 */,
+  TILE_OPC_SLTE, TILE_OPC_SLTE_U, TILE_OPC_SLT, TILE_OPC_SLT_U,
+  BITFIELD(18, 2) /* index 57 */,
+  TILE_OPC_MULHLSA_UU, TILE_OPC_S3A, TILE_OPC_SEQ, TILE_OPC_SNE,
+  BITFIELD(18, 2) /* index 62 */,
+  TILE_OPC_MULHH_SS, TILE_OPC_MULHH_UU, TILE_OPC_MULLL_SS, TILE_OPC_MULLL_UU,
+  BITFIELD(18, 2) /* index 67 */,
+  TILE_OPC_MULHHA_SS, TILE_OPC_MULHHA_UU, TILE_OPC_MULLLA_SS,
+  TILE_OPC_MULLLA_UU,
+  BITFIELD(0, 2) /* index 72 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(77),
+  BITFIELD(2, 2) /* index 77 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(82),
+  BITFIELD(4, 2) /* index 82 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(87),
+  BITFIELD(6, 2) /* index 87 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(92),
+  BITFIELD(8, 2) /* index 92 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(97),
+  BITFIELD(10, 2) /* index 97 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_INFO,
+  BITFIELD(6, 2) /* index 102 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(107),
+  BITFIELD(8, 2) /* index 107 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(112),
+  BITFIELD(10, 2) /* index 112 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_MOVEI,
+  BITFIELD(15, 5) /* index 117 */,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_RLI,
+  TILE_OPC_RLI, TILE_OPC_RLI, TILE_OPC_RLI, TILE_OPC_SHLI, TILE_OPC_SHLI,
+  TILE_OPC_SHLI, TILE_OPC_SHLI, TILE_OPC_SHRI, TILE_OPC_SHRI, TILE_OPC_SHRI,
+  TILE_OPC_SHRI, TILE_OPC_SRAI, TILE_OPC_SRAI, TILE_OPC_SRAI, TILE_OPC_SRAI,
+  CHILD(150), CHILD(159), TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(12, 3) /* index 150 */,
+  TILE_OPC_NONE, TILE_OPC_BITX, TILE_OPC_BYTEX, TILE_OPC_CLZ, TILE_OPC_CTZ,
+  TILE_OPC_FNOP, TILE_OPC_NOP, TILE_OPC_PCNT,
+  BITFIELD(12, 3) /* index 159 */,
+  TILE_OPC_TBLIDXB0, TILE_OPC_TBLIDXB1, TILE_OPC_TBLIDXB2, TILE_OPC_TBLIDXB3,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+};
+
+static const unsigned short decode_Y1_fsm[140] =
+{
+  BITFIELD(59, 4) /* index 0 */,
+  TILE_OPC_NONE, CHILD(17), CHILD(22), CHILD(27), CHILD(47), CHILD(52),
+  CHILD(57), TILE_OPC_ADDI, CHILD(62), CHILD(92), TILE_OPC_SEQI, CHILD(107),
+  TILE_OPC_SLTI, TILE_OPC_SLTI_U, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(49, 2) /* index 17 */,
+  TILE_OPC_ADD, TILE_OPC_S1A, TILE_OPC_S2A, TILE_OPC_SUB,
+  BITFIELD(49, 2) /* index 22 */,
+  TILE_OPC_NONE, TILE_OPC_MNZ, TILE_OPC_MZ, TILE_OPC_NONE,
+  BITFIELD(49, 2) /* index 27 */,
+  TILE_OPC_AND, TILE_OPC_NOR, CHILD(32), TILE_OPC_XOR,
+  BITFIELD(43, 2) /* index 32 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(37),
+  BITFIELD(45, 2) /* index 37 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, CHILD(42),
+  BITFIELD(47, 2) /* index 42 */,
+  TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_OR, TILE_OPC_MOVE,
+  BITFIELD(49, 2) /* index 47 */,
+  TILE_OPC_RL, TILE_OPC_SHL, TILE_OPC_SHR, TILE_OPC_SRA,
+  BITFIELD(49, 2) /* index 52 */,
+  TILE_OPC_SLTE, TILE_OPC_SLTE_U, TILE_OPC_SLT, TILE_OPC_SLT_U,
+  BITFIELD(49, 2) /* index 57 */,
+  TILE_OPC_NONE, TILE_OPC_S3A, TILE_OPC_SEQ, TILE_OPC_SNE,
+  BITFIELD(31, 2) /* index 62 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(67),
+  BITFIELD(33, 2) /* index 67 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(72),
+  BITFIELD(35, 2) /* index 72 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(77),
+  BITFIELD(37, 2) /* index 77 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(82),
+  BITFIELD(39, 2) /* index 82 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, CHILD(87),
+  BITFIELD(41, 2) /* index 87 */,
+  TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_ANDI, TILE_OPC_INFO,
+  BITFIELD(37, 2) /* index 92 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(97),
+  BITFIELD(39, 2) /* index 97 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, CHILD(102),
+  BITFIELD(41, 2) /* index 102 */,
+  TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_ORI, TILE_OPC_MOVEI,
+  BITFIELD(48, 3) /* index 107 */,
+  TILE_OPC_NONE, TILE_OPC_RLI, TILE_OPC_SHLI, TILE_OPC_SHRI, TILE_OPC_SRAI,
+  CHILD(116), TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(43, 3) /* index 116 */,
+  TILE_OPC_NONE, CHILD(125), CHILD(130), CHILD(135), TILE_OPC_NONE,
+  TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(46, 2) /* index 125 */,
+  TILE_OPC_FNOP, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(46, 2) /* index 130 */,
+  TILE_OPC_ILL, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+  BITFIELD(46, 2) /* index 135 */,
+  TILE_OPC_NOP, TILE_OPC_NONE, TILE_OPC_NONE, TILE_OPC_NONE,
+};
+
+static const unsigned short decode_Y2_fsm[24] =
+{
+  BITFIELD(56, 3) /* index 0 */,
+  CHILD(9), TILE_OPC_LB_U, TILE_OPC_LH, TILE_OPC_LH_U, TILE_OPC_LW,
+  TILE_OPC_SB, TILE_OPC_SH, TILE_OPC_SW,
+  BITFIELD(20, 2) /* index 9 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, CHILD(14),
+  BITFIELD(22, 2) /* index 14 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, CHILD(19),
+  BITFIELD(24, 2) /* index 19 */,
+  TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_LB, TILE_OPC_PREFETCH,
+};
+
+#undef BITFIELD
+#undef CHILD
+const unsigned short * const
+tile_bundle_decoder_fsms[TILE_NUM_PIPELINE_ENCODINGS] =
+{
+  decode_X0_fsm,
+  decode_X1_fsm,
+  decode_Y0_fsm,
+  decode_Y1_fsm,
+  decode_Y2_fsm
+};
+const struct tile_operand tile_operands[43] =
+{
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM8_X0),
+    8, 1, 0, 0, 0, 0,
+    create_Imm8_X0, get_Imm8_X0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM8_X1),
+    8, 1, 0, 0, 0, 0,
+    create_Imm8_X1, get_Imm8_X1
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM8_Y0),
+    8, 1, 0, 0, 0, 0,
+    create_Imm8_Y0, get_Imm8_Y0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM8_Y1),
+    8, 1, 0, 0, 0, 0,
+    create_Imm8_Y1, get_Imm8_Y1
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM16_X0),
+    16, 1, 0, 0, 0, 0,
+    create_Imm16_X0, get_Imm16_X0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_IMM16_X1),
+    16, 1, 0, 0, 0, 0,
+    create_Imm16_X1, get_Imm16_X1
+  },
+  {
+    TILE_OP_TYPE_ADDRESS, BFD_RELOC(TILE_JOFFLONG_X1),
+    29, 1, 0, 0, 1, TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES,
+    create_JOffLong_X1, get_JOffLong_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 0, 1, 0, 0,
+    create_Dest_X0, get_Dest_X0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcA_X0, get_SrcA_X0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 0, 1, 0, 0,
+    create_Dest_X1, get_Dest_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcA_X1, get_SrcA_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 0, 1, 0, 0,
+    create_Dest_Y0, get_Dest_Y0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcA_Y0, get_SrcA_Y0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 0, 1, 0, 0,
+    create_Dest_Y1, get_Dest_Y1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcA_Y1, get_SrcA_Y1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcA_Y2, get_SrcA_Y2
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcB_X0, get_SrcB_X0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcB_X1, get_SrcB_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcB_Y0, get_SrcB_Y0
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcB_Y1, get_SrcB_Y1
+  },
+  {
+    TILE_OP_TYPE_ADDRESS, BFD_RELOC(TILE_BROFF_X1),
+    17, 1, 0, 0, 1, TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES,
+    create_BrOff_X1, get_BrOff_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 1, 0, 0,
+    create_Dest_X0, get_Dest_X0
+  },
+  {
+    TILE_OP_TYPE_ADDRESS, BFD_RELOC(NONE),
+    28, 1, 0, 0, 1, TILE_LOG2_BUNDLE_ALIGNMENT_IN_BYTES,
+    create_JOff_X1, get_JOff_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 0, 1, 0, 0,
+    create_SrcBDest_Y2, get_SrcBDest_Y2
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 1, 0, 0,
+    create_SrcA_X1, get_SrcA_X1
+  },
+  {
+    TILE_OP_TYPE_SPR, BFD_RELOC(TILE_MF_IMM15_X1),
+    15, 0, 0, 0, 0, 0,
+    create_MF_Imm15_X1, get_MF_Imm15_X1
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_MMSTART_X0),
+    5, 0, 0, 0, 0, 0,
+    create_MMStart_X0, get_MMStart_X0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_MMEND_X0),
+    5, 0, 0, 0, 0, 0,
+    create_MMEnd_X0, get_MMEnd_X0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_MMSTART_X1),
+    5, 0, 0, 0, 0, 0,
+    create_MMStart_X1, get_MMStart_X1
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_MMEND_X1),
+    5, 0, 0, 0, 0, 0,
+    create_MMEnd_X1, get_MMEnd_X1
+  },
+  {
+    TILE_OP_TYPE_SPR, BFD_RELOC(TILE_MT_IMM15_X1),
+    15, 0, 0, 0, 0, 0,
+    create_MT_Imm15_X1, get_MT_Imm15_X1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 1, 0, 0,
+    create_Dest_Y0, get_Dest_Y0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SHAMT_X0),
+    5, 0, 0, 0, 0, 0,
+    create_ShAmt_X0, get_ShAmt_X0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SHAMT_X1),
+    5, 0, 0, 0, 0, 0,
+    create_ShAmt_X1, get_ShAmt_X1
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SHAMT_Y0),
+    5, 0, 0, 0, 0, 0,
+    create_ShAmt_Y0, get_ShAmt_Y0
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SHAMT_Y1),
+    5, 0, 0, 0, 0, 0,
+    create_ShAmt_Y1, get_ShAmt_Y1
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    6, 0, 1, 0, 0, 0,
+    create_SrcBDest_Y2, get_SrcBDest_Y2
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(NONE),
+    8, 1, 0, 0, 0, 0,
+    create_Dest_Imm8_X1, get_Dest_Imm8_X1
+  },
+  {
+    TILE_OP_TYPE_ADDRESS, BFD_RELOC(TILE_SN_BROFF),
+    10, 1, 0, 0, 1, TILE_LOG2_SN_INSTRUCTION_SIZE_IN_BYTES,
+    create_BrOff_SN, get_BrOff_SN
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SN_UIMM8),
+    8, 0, 0, 0, 0, 0,
+    create_Imm8_SN, get_Imm8_SN
+  },
+  {
+    TILE_OP_TYPE_IMMEDIATE, BFD_RELOC(TILE_SN_IMM8),
+    8, 1, 0, 0, 0, 0,
+    create_Imm8_SN, get_Imm8_SN
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    2, 0, 0, 1, 0, 0,
+    create_Dest_SN, get_Dest_SN
+  },
+  {
+    TILE_OP_TYPE_REGISTER, BFD_RELOC(NONE),
+    2, 0, 1, 0, 0, 0,
+    create_Src_SN, get_Src_SN
+  }
+};
+
+
+
+
+/* Given a set of bundle bits and the lookup FSM for a specific pipe,
+ * returns which instruction the bundle contains in that pipe.
+ */
+static const struct tile_opcode *
+find_opcode(tile_bundle_bits bits, const unsigned short *table)
+{
+  int index = 0;
+
+  while (1)
+  {
+    unsigned short bitspec = table[index];
+    unsigned int bitfield =
+      ((unsigned int)(bits >> (bitspec & 63))) & (bitspec >> 6);
+
+    unsigned short next = table[index + 1 + bitfield];
+    if (next <= TILE_OPC_NONE)
+      return &tile_opcodes[next];
+
+    index = next - TILE_OPC_NONE;
+  }
+}
+
+
+int
+parse_insn_tile(tile_bundle_bits bits,
+                unsigned int pc,
+                struct tile_decoded_instruction
+                decoded[TILE_MAX_INSTRUCTIONS_PER_BUNDLE])
+{
+  int num_instructions = 0;
+  int pipe;
+
+  int min_pipe, max_pipe;
+  if ((bits & TILE_BUNDLE_Y_ENCODING_MASK) == 0)
+  {
+    min_pipe = TILE_PIPELINE_X0;
+    max_pipe = TILE_PIPELINE_X1;
+  }
+  else
+  {
+    min_pipe = TILE_PIPELINE_Y0;
+    max_pipe = TILE_PIPELINE_Y2;
+  }
+
+  /* For each pipe, find an instruction that fits. */
+  for (pipe = min_pipe; pipe <= max_pipe; pipe++)
+  {
+    const struct tile_opcode *opc;
+    struct tile_decoded_instruction *d;
+    int i;
+
+    d = &decoded[num_instructions++];
+    opc = find_opcode (bits, tile_bundle_decoder_fsms[pipe]);
+    d->opcode = opc;
+
+    /* Decode each operand, sign extending, etc. as appropriate. */
+    for (i = 0; i < opc->num_operands; i++)
+    {
+      const struct tile_operand *op =
+        &tile_operands[opc->operands[pipe][i]];
+      int opval = op->extract (bits);
+      if (op->is_signed)
+      {
+        /* Sign-extend the operand. */
+        int shift = (int)((sizeof(int) * 8) - op->num_bits);
+        opval = (opval << shift) >> shift;
+      }
+
+      /* Adjust PC-relative scaled branch offsets. */
+      if (op->type == TILE_OP_TYPE_ADDRESS)
+      {
+        opval *= TILE_BUNDLE_SIZE_IN_BYTES;
+        opval += (int)pc;
+      }
+
+      /* Record the final value. */
+      d->operands[i] = op;
+      d->operand_values[i] = opval;
+    }
+  }
+
+  return num_instructions;
+}
diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c
new file mode 100644
index 000000000000..6bed820e1421
--- /dev/null
+++ b/arch/tile/kernel/time.c
@@ -0,0 +1,226 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Support the cycle counter clocksource and tile timer clock event device.
+ */
+
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/hardirq.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/delay.h>
+#include <asm/irq_regs.h>
+#include <asm/traps.h>
+#include <hv/hypervisor.h>
+#include <arch/interrupts.h>
+#include <arch/spr_def.h>
+
+
+/*
+ * Define the cycle counter clock source.
+ */
+
+/* How many cycles per second we are running at. */
+static cycles_t cycles_per_sec __write_once;
+
+cycles_t get_clock_rate(void)
+{
+        return cycles_per_sec;
+}
+
+#if CHIP_HAS_SPLIT_CYCLE()
+cycles_t get_cycles(void)
+{
+        unsigned int high = __insn_mfspr(SPR_CYCLE_HIGH);
+        unsigned int low = __insn_mfspr(SPR_CYCLE_LOW);
+        unsigned int high2 = __insn_mfspr(SPR_CYCLE_HIGH);
+
+        while (unlikely(high != high2)) {
+                low = __insn_mfspr(SPR_CYCLE_LOW);
+                high = high2;
+                high2 = __insn_mfspr(SPR_CYCLE_HIGH);
+        }
+
+        return (((cycles_t)high) << 32) | low;
+}
+#endif
+
+/*
+ * We use a relatively small shift value so that sched_clock()
+ * won't wrap around very often.
+ */
+#define SCHED_CLOCK_SHIFT 10
+
+static unsigned long sched_clock_mult __write_once;
+
+static cycles_t clocksource_get_cycles(struct clocksource *cs)
+{
+        return get_cycles();
+}
+
+static struct clocksource cycle_counter_cs = {
+        .name = "cycle counter",
+        .rating = 300,
+        .read = clocksource_get_cycles,
+        .mask = CLOCKSOURCE_MASK(64),
+        .shift = 22,   /* typical value, e.g. x86 tsc uses this */
+        .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+/*
+ * Called very early from setup_arch() to set cycles_per_sec.
+ * We initialize it early so we can use it to set up loops_per_jiffy.
+ */
+void __init setup_clock(void)
+{
+        cycles_per_sec = hv_sysconf(HV_SYSCONF_CPU_SPEED);
+        sched_clock_mult =
+                clocksource_hz2mult(cycles_per_sec, SCHED_CLOCK_SHIFT);
+        cycle_counter_cs.mult =
+                clocksource_hz2mult(cycles_per_sec, cycle_counter_cs.shift);
+}
+
+void __init calibrate_delay(void)
+{
+        loops_per_jiffy = get_clock_rate() / HZ;
+        pr_info("Clock rate yields %lu.%02lu BogoMIPS (lpj=%lu)\n",
+                loops_per_jiffy/(500000/HZ),
+                (loops_per_jiffy/(5000/HZ)) % 100, loops_per_jiffy);
+}
+
+/* Called fairly late in init/main.c, but before we go smp. */
+void __init time_init(void)
+{
+        /* Initialize and register the clock source. */
+        clocksource_register(&cycle_counter_cs);
+
+        /* Start up the tile-timer interrupt source on the boot cpu. */
+        setup_tile_timer();
+}
+
+
+/*
+ * Define the tile timer clock event device.  The timer is driven by
+ * the TILE_TIMER_CONTROL register, which consists of a 31-bit down
+ * counter, plus bit 31, which signifies that the counter has wrapped
+ * from zero to (2**31) - 1.  The INT_TILE_TIMER interrupt will be
+ * raised as long as bit 31 is set.
+ *
+ * The TILE_MINSEC value represents the largest range of real-time
+ * we can possibly cover with the timer, based on MAX_TICK combined
+ * with the slowest reasonable clock rate we might run at.
+ */
+
+#define MAX_TICK 0x7fffffff   /* we have 31 bits of countdown timer */
+#define TILE_MINSEC 5         /* timer covers no more than 5 seconds */
+
+static int tile_timer_set_next_event(unsigned long ticks,
+                                     struct clock_event_device *evt)
+{
+        BUG_ON(ticks > MAX_TICK);
+        __insn_mtspr(SPR_TILE_TIMER_CONTROL, ticks);
+        raw_local_irq_unmask_now(INT_TILE_TIMER);
+        return 0;
+}
+
+/*
+ * Whenever anyone tries to change modes, we just mask interrupts
+ * and wait for the next event to get set.
+ */
+static void tile_timer_set_mode(enum clock_event_mode mode,
+                                struct clock_event_device *evt)
+{
+        raw_local_irq_mask_now(INT_TILE_TIMER);
+}
+
+/*
+ * Set min_delta_ns to 1 microsecond, since it takes about
+ * that long to fire the interrupt.
+ */
+static DEFINE_PER_CPU(struct clock_event_device, tile_timer) = {
+        .name = "tile timer",
+        .features = CLOCK_EVT_FEAT_ONESHOT,
+        .min_delta_ns = 1000,
+        .rating = 100,
+        .irq = -1,
+        .set_next_event = tile_timer_set_next_event,
+        .set_mode = tile_timer_set_mode,
+};
+
+void __cpuinit setup_tile_timer(void)
+{
+        struct clock_event_device *evt = &__get_cpu_var(tile_timer);
+
+        /* Fill in fields that are speed-specific. */
+        clockevents_calc_mult_shift(evt, cycles_per_sec, TILE_MINSEC);
+        evt->max_delta_ns = clockevent_delta2ns(MAX_TICK, evt);
+
+        /* Mark as being for this cpu only. */
+        evt->cpumask = cpumask_of(smp_processor_id());
+
+        /* Start out with timer not firing. */
+        raw_local_irq_mask_now(INT_TILE_TIMER);
+
+        /* Register tile timer. */
+        clockevents_register_device(evt);
+}
+
+/* Called from the interrupt vector. */
+void do_timer_interrupt(struct pt_regs *regs, int fault_num)
+{
+        struct pt_regs *old_regs = set_irq_regs(regs);
+        struct clock_event_device *evt = &__get_cpu_var(tile_timer);
+
+        /*
+         * Mask the timer interrupt here, since we are a oneshot timer
+         * and there are now by definition no events pending.
+         */
+        raw_local_irq_mask(INT_TILE_TIMER);
+
+        /* Track time spent here in an interrupt context */
+        irq_enter();
+
+        /* Track interrupt count. */
+        __get_cpu_var(irq_stat).irq_timer_count++;
+
+        /* Call the generic timer handler */
+        evt->event_handler(evt);
+
+        /*
+         * Track time spent against the current process again and
+         * process any softirqs if they are waiting.
+         */
+        irq_exit();
+
+        set_irq_regs(old_regs);
+}
+
+/*
+ * Scheduler clock - returns current time in nanosec units.
+ * Note that with LOCKDEP, this is called during lockdep_init(), and
+ * we will claim that sched_clock() is zero for a little while, until
+ * we run setup_clock(), above.
+ */
+unsigned long long sched_clock(void)
+{
+        return clocksource_cyc2ns(get_cycles(),
+                                  sched_clock_mult, SCHED_CLOCK_SHIFT);
+}
+
+int setup_profiling_timer(unsigned int multiplier)
+{
+        return -EINVAL;
+}
diff --git a/arch/tile/kernel/tlb.c b/arch/tile/kernel/tlb.c
new file mode 100644
index 000000000000..2dffc1044d83
--- /dev/null
+++ b/arch/tile/kernel/tlb.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ */
+
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <asm/tlbflush.h>
+#include <asm/homecache.h>
+#include <hv/hypervisor.h>
+
+/* From tlbflush.h */
+DEFINE_PER_CPU(int, current_asid);
+int min_asid, max_asid;
+
+/*
+ * Note that we flush the L1I (for VM_EXEC pages) as well as the TLB
+ * so that when we are unmapping an executable page, we also flush it.
+ * Combined with flushing the L1I at context switch time, this means
+ * we don't have to do any other icache flushes.
+ */
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+        HV_Remote_ASID asids[NR_CPUS];
+        int i = 0, cpu;
+        for_each_cpu(cpu, &mm->cpu_vm_mask) {
+                HV_Remote_ASID *asid = &asids[i++];
+                asid->y = cpu / smp_topology.width;
+                asid->x = cpu % smp_topology.width;
+                asid->asid = per_cpu(current_asid, cpu);
+        }
+        flush_remote(0, HV_FLUSH_EVICT_L1I, &mm->cpu_vm_mask,
+                     0, 0, 0, NULL, asids, i);
+}
+
+void flush_tlb_current_task(void)
+{
+        flush_tlb_mm(current->mm);
+}
+
+void flush_tlb_page_mm(const struct vm_area_struct *vma, struct mm_struct *mm,
+                       unsigned long va)
+{
+        unsigned long size = hv_page_size(vma);
+        int cache = (vma->vm_flags & VM_EXEC) ? HV_FLUSH_EVICT_L1I : 0;
+        flush_remote(0, cache, &mm->cpu_vm_mask,
+                     va, size, size, &mm->cpu_vm_mask, NULL, 0);
+}
+
+void flush_tlb_page(const struct vm_area_struct *vma, unsigned long va)
+{
+        flush_tlb_page_mm(vma, vma->vm_mm, va);
+}
+EXPORT_SYMBOL(flush_tlb_page);
+
+void flush_tlb_range(const struct vm_area_struct *vma,
+                     unsigned long start, unsigned long end)
+{
+        unsigned long size = hv_page_size(vma);
+        struct mm_struct *mm = vma->vm_mm;
+        int cache = (vma->vm_flags & VM_EXEC) ? HV_FLUSH_EVICT_L1I : 0;
+        flush_remote(0, cache, &mm->cpu_vm_mask, start, end - start, size,
+                     &mm->cpu_vm_mask, NULL, 0);
+}
+
+void flush_tlb_all(void)
+{
+        int i;
+        for (i = 0; ; ++i) {
+                HV_VirtAddrRange r = hv_inquire_virtual(i);
+                if (r.size == 0)
+                        break;
+                flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask,
+                             r.start, r.size, PAGE_SIZE, cpu_online_mask,
+                             NULL, 0);
+                flush_remote(0, 0, NULL,
+                             r.start, r.size, HPAGE_SIZE, cpu_online_mask,
+                             NULL, 0);
+        }
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+        flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask,
+                     start, end - start, PAGE_SIZE, cpu_online_mask, NULL, 0);
+}
diff --git a/arch/tile/kernel/traps.c b/arch/tile/kernel/traps.c
new file mode 100644
index 000000000000..0f362dc2c57f
--- /dev/null
+++ b/arch/tile/kernel/traps.c
@@ -0,0 +1,319 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/kprobes.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/uaccess.h>
+#include <linux/ptrace.h>
+#include <asm/opcode-tile.h>
+#include <asm/opcode_constants.h>
+#include <asm/stack.h>
+#include <asm/traps.h>
+
+#include <arch/interrupts.h>
+#include <arch/spr_def.h>
+
+void __init trap_init(void)
+{
+        /* Nothing needed here since we link code at .intrpt1 */
+}
+
+int unaligned_fixup = 1;
+
+static int __init setup_unaligned_fixup(char *str)
+{
+        /*
+         * Say "=-1" to completely disable it.  If you just do "=0", we
+         * will still parse the instruction, then fire a SIGBUS with
+         * the correct address from inside the single_step code.
+         */
+        long val;
+        if (strict_strtol(str, 0, &val) != 0)
+                return 0;
+        unaligned_fixup = val;
+        pr_info("Fixups for unaligned data accesses are %s\n",
+               unaligned_fixup >= 0 ?
+               (unaligned_fixup ? "enabled" : "disabled") :
+               "completely disabled");
+        return 1;
+}
+__setup("unaligned_fixup=", setup_unaligned_fixup);
+
+#if CHIP_HAS_TILE_DMA()
+
+static int dma_disabled;
+
+static int __init nodma(char *str)
+{
+        pr_info("User-space DMA is disabled\n");
+        dma_disabled = 1;
+        return 1;
+}
+__setup("nodma", nodma);
+
+/* How to decode SPR_GPV_REASON */
+#define IRET_ERROR (1U << 31)
+#define MT_ERROR   (1U << 30)
+#define MF_ERROR   (1U << 29)
+#define SPR_INDEX  ((1U << 15) - 1)
+#define SPR_MPL_SHIFT  9  /* starting bit position for MPL encoded in SPR */
+
+/*
+ * See if this GPV is just to notify the kernel of SPR use and we can
+ * retry the user instruction after adjusting some MPLs suitably.
+ */
+static int retry_gpv(unsigned int gpv_reason)
+{
+        int mpl;
+
+        if (gpv_reason & IRET_ERROR)
+                return 0;
+
+        BUG_ON((gpv_reason & (MT_ERROR|MF_ERROR)) == 0);
+        mpl = (gpv_reason & SPR_INDEX) >> SPR_MPL_SHIFT;
+        if (mpl == INT_DMA_NOTIFY && !dma_disabled) {
+                /* User is turning on DMA. Allow it and retry. */
+                printk(KERN_DEBUG "Process %d/%s is now enabled for DMA\n",
+                       current->pid, current->comm);
+                BUG_ON(current->thread.tile_dma_state.enabled);
+                current->thread.tile_dma_state.enabled = 1;
+                grant_dma_mpls();
+                return 1;
+        }
+
+        return 0;
+}
+
+#endif /* CHIP_HAS_TILE_DMA() */
+
+#ifdef __tilegx__
+#define bundle_bits tilegx_bundle_bits
+#else
+#define bundle_bits tile_bundle_bits
+#endif
+
+extern bundle_bits bpt_code;
+
+asm(".pushsection .rodata.bpt_code,\"a\";"
+    ".align 8;"
+    "bpt_code: bpt;"
+    ".size bpt_code,.-bpt_code;"
+    ".popsection");
+
+static int special_ill(bundle_bits bundle, int *sigp, int *codep)
+{
+        int sig, code, maxcode;
+
+        if (bundle == bpt_code) {
+                *sigp = SIGTRAP;
+                *codep = TRAP_BRKPT;
+                return 1;
+        }
+
+        /* If it's a "raise" bundle, then "ill" must be in pipe X1. */
+#ifdef __tilegx__
+        if ((bundle & TILEGX_BUNDLE_MODE_MASK) != 0)
+                return 0;
+        if (get_Opcode_X1(bundle) != RRR_0_OPCODE_X1)
+                return 0;
+        if (get_RRROpcodeExtension_X1(bundle) != UNARY_RRR_0_OPCODE_X1)
+                return 0;
+        if (get_UnaryOpcodeExtension_X1(bundle) != ILL_UNARY_OPCODE_X1)
+                return 0;
+#else
+        if (bundle & TILE_BUNDLE_Y_ENCODING_MASK)
+                return 0;
+        if (get_Opcode_X1(bundle) != SHUN_0_OPCODE_X1)
+                return 0;
+        if (get_UnShOpcodeExtension_X1(bundle) != UN_0_SHUN_0_OPCODE_X1)
+                return 0;
+        if (get_UnOpcodeExtension_X1(bundle) != ILL_UN_0_SHUN_0_OPCODE_X1)
+                return 0;
+#endif
+
+        /* Check that the magic distinguishers are set to mean "raise". */
+        if (get_Dest_X1(bundle) != 29 || get_SrcA_X1(bundle) != 37)
+                return 0;
+
+        /* There must be an "addli zero, zero, VAL" in X0. */
+        if (get_Opcode_X0(bundle) != ADDLI_OPCODE_X0)
+                return 0;
+        if (get_Dest_X0(bundle) != TREG_ZERO)
+                return 0;
+        if (get_SrcA_X0(bundle) != TREG_ZERO)
+                return 0;
+
+        /*
+         * Validate the proposed signal number and si_code value.
+         * Note that we embed these in the static instruction itself
+         * so that we perturb the register state as little as possible
+         * at the time of the actual fault; it's unlikely you'd ever
+         * need to dynamically choose which kind of fault to raise
+         * from user space.
+         */
+        sig = get_Imm16_X0(bundle) & 0x3f;
+        switch (sig) {
+        case SIGILL:
+                maxcode = NSIGILL;
+                break;
+        case SIGFPE:
+                maxcode = NSIGFPE;
+                break;
+        case SIGSEGV:
+                maxcode = NSIGSEGV;
+                break;
+        case SIGBUS:
+                maxcode = NSIGBUS;
+                break;
+        case SIGTRAP:
+                maxcode = NSIGTRAP;
+                break;
+        default:
+                return 0;
+        }
+        code = (get_Imm16_X0(bundle) >> 6) & 0xf;
+        if (code <= 0 || code > maxcode)
+                return 0;
+
+        /* Make it the requested signal. */
+        *sigp = sig;
+        *codep = code | __SI_FAULT;
+        return 1;
+}
+
+void __kprobes do_trap(struct pt_regs *regs, int fault_num,
+                       unsigned long reason)
+{
+        siginfo_t info = { 0 };
+        int signo, code;
+        unsigned long address;
+        bundle_bits instr;
+
+        /* Re-enable interrupts. */
+        local_irq_enable();
+
+        /*
+         * If it hits in kernel mode and we can't fix it up, just exit the
+         * current process and hope for the best.
+         */
+        if (!user_mode(regs)) {
+                if (fixup_exception(regs))  /* only UNALIGN_DATA in practice */
+                        return;
+                pr_alert("Kernel took bad trap %d at PC %#lx\n",
+                       fault_num, regs->pc);
+                if (fault_num == INT_GPV)
+                        pr_alert("GPV_REASON is %#lx\n", reason);
+                show_regs(regs);
+                do_exit(SIGKILL);  /* FIXME: implement i386 die() */
+                return;
+        }
+
+        switch (fault_num) {
+        case INT_ILL:
+                if (copy_from_user(&instr, (void __user *)regs->pc,
+                                   sizeof(instr))) {
+                        pr_err("Unreadable instruction for INT_ILL:"
+                               " %#lx\n", regs->pc);
+                        do_exit(SIGKILL);
+                        return;
+                }
+                if (!special_ill(instr, &signo, &code)) {
+                        signo = SIGILL;
+                        code = ILL_ILLOPC;
+                }
+                address = regs->pc;
+                break;
+        case INT_GPV:
+#if CHIP_HAS_TILE_DMA()
+                if (retry_gpv(reason))
+                        return;
+#endif
+                /*FALLTHROUGH*/
+        case INT_UDN_ACCESS:
+        case INT_IDN_ACCESS:
+#if CHIP_HAS_SN()
+        case INT_SN_ACCESS:
+#endif
+                signo = SIGILL;
+                code = ILL_PRVREG;
+                address = regs->pc;
+                break;
+        case INT_SWINT_3:
+        case INT_SWINT_2:
+        case INT_SWINT_0:
+                signo = SIGILL;
+                code = ILL_ILLTRP;
+                address = regs->pc;
+                break;
+        case INT_UNALIGN_DATA:
+#ifndef __tilegx__  /* FIXME: GX: no single-step yet */
+                if (unaligned_fixup >= 0) {
+                        struct single_step_state *state =
+                                current_thread_info()->step_state;
+                        if (!state ||
+                            (void __user *)(regs->pc) != state->buffer) {
+                                single_step_once(regs);
+                                return;
+                        }
+                }
+#endif
+                signo = SIGBUS;
+                code = BUS_ADRALN;
+                address = 0;
+                break;
+        case INT_DOUBLE_FAULT:
+                /*
+                 * For double fault, "reason" is actually passed as
+                 * SYSTEM_SAVE_1_2, the hypervisor's double-fault info, so
+                 * we can provide the original fault number rather than
+                 * the uninteresting "INT_DOUBLE_FAULT" so the user can
+                 * learn what actually struck while PL0 ICS was set.
+                 */
+                fault_num = reason;
+                signo = SIGILL;
+                code = ILL_DBLFLT;
+                address = regs->pc;
+                break;
+#ifdef __tilegx__
+        case INT_ILL_TRANS:
+                signo = SIGSEGV;
+                code = SEGV_MAPERR;
+                if (reason & SPR_ILL_TRANS_REASON__I_STREAM_VA_RMASK)
+                        address = regs->pc;
+                else
+                        address = 0;  /* FIXME: GX: single-step for address */
+                break;
+#endif
+        default:
+                panic("Unexpected do_trap interrupt number %d", fault_num);
+                return;
+        }
+
+        info.si_signo = signo;
+        info.si_code = code;
+        info.si_addr = (void __user *)address;
+        if (signo == SIGILL)
+                info.si_trapno = fault_num;
+        force_sig_info(signo, &info, current);
+}
+
+void kernel_double_fault(int dummy, ulong pc, ulong lr, ulong sp, ulong r52)
+{
+        _dump_stack(dummy, pc, lr, sp, r52);
+        pr_emerg("Double fault: exiting\n");
+        machine_halt();
+}
diff --git a/arch/tile/kernel/vmlinux.lds.S b/arch/tile/kernel/vmlinux.lds.S
new file mode 100644
index 000000000000..25fdc0c1839a
--- /dev/null
+++ b/arch/tile/kernel/vmlinux.lds.S
@@ -0,0 +1,98 @@
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+#include <asm/cache.h>
+#include <asm/thread_info.h>
+#include <hv/hypervisor.h>
+
+/* Text loads starting from the supervisor interrupt vector address. */
+#define TEXT_OFFSET MEM_SV_INTRPT
+
+OUTPUT_ARCH(tile)
+ENTRY(_start)
+jiffies = jiffies_64;
+
+PHDRS
+{
+  intrpt1 PT_LOAD ;
+  text PT_LOAD ;
+  data PT_LOAD ;
+}
+SECTIONS
+{
+  /* Text is loaded with a different VA than data; start with text. */
+  #undef LOAD_OFFSET
+  #define LOAD_OFFSET TEXT_OFFSET
+
+  /* Interrupt vectors */
+  .intrpt1 (LOAD_OFFSET) : AT ( 0 )   /* put at the start of physical memory */
+  {
+    _text = .;
+    _stext = .;
+    *(.intrpt1)
+  } :intrpt1 =0
+
+  /* Hypervisor call vectors */
+  #include "hvglue.lds"
+
+  /* Now the real code */
+  . = ALIGN(0x20000);
+  .text : AT (ADDR(.text) - LOAD_OFFSET) {
+    HEAD_TEXT
+    SCHED_TEXT
+    LOCK_TEXT
+    __fix_text_end = .;   /* tile-cpack won't rearrange before this */
+    TEXT_TEXT
+    *(.text.*)
+    *(.coldtext*)
+    *(.fixup)
+    *(.gnu.warning)
+  } :text =0
+  _etext = .;
+
+  /* "Init" is divided into two areas with very different virtual addresses. */
+  INIT_TEXT_SECTION(PAGE_SIZE)
+
+  /* Now we skip back to PAGE_OFFSET for the data. */
+  . = (. - TEXT_OFFSET + PAGE_OFFSET);
+  #undef LOAD_OFFSET
+  #define LOAD_OFFSET PAGE_OFFSET
+
+  . = ALIGN(PAGE_SIZE);
+  VMLINUX_SYMBOL(_sinitdata) = .;
+  .init.page : AT (ADDR(.init.page) - LOAD_OFFSET) {
+    *(.init.page)
+  } :data =0
+  INIT_DATA_SECTION(16)
+  PERCPU(PAGE_SIZE)
+  . = ALIGN(PAGE_SIZE);
+  VMLINUX_SYMBOL(_einitdata) = .;
+
+  _sdata = .;                   /* Start of data section */
+
+  RO_DATA_SECTION(PAGE_SIZE)
+
+  /* initially writeable, then read-only */
+  . = ALIGN(PAGE_SIZE);
+  __w1data_begin = .;
+  .w1data : AT(ADDR(.w1data) - LOAD_OFFSET) {
+    VMLINUX_SYMBOL(__w1data_begin) = .;
+    *(.w1data)
+    VMLINUX_SYMBOL(__w1data_end) = .;
+  }
+
+  RW_DATA_SECTION(L2_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
+
+  _edata = .;
+
+  EXCEPTION_TABLE(L2_CACHE_BYTES)
+  NOTES
+
+
+  BSS_SECTION(8, PAGE_SIZE, 1)
+  _end = . ;
+
+  STABS_DEBUG
+  DWARF_DEBUG
+
+  DISCARDS
+}
diff --git a/arch/tile/lib/Makefile b/arch/tile/lib/Makefile
new file mode 100644
index 000000000000..746dc81ed3c4
--- /dev/null
+++ b/arch/tile/lib/Makefile
@@ -0,0 +1,18 @@
+#
+# Makefile for TILE-specific library files..
+#
+
+lib-y = cacheflush.o checksum.o cpumask.o delay.o \
+        mb_incoherent.o uaccess.o \
+        memcpy_$(BITS).o memchr_$(BITS).o memmove_$(BITS).o memset_$(BITS).o \
+        strchr_$(BITS).o strlen_$(BITS).o
+
+ifeq ($(CONFIG_TILEGX),y)
+lib-y += memcpy_user_64.o
+else
+lib-y += atomic_32.o atomic_asm_32.o memcpy_tile64.o
+endif
+
+lib-$(CONFIG_SMP) += spinlock_$(BITS).o usercopy_$(BITS).o
+
+obj-$(CONFIG_MODULES) += exports.o
diff --git a/arch/tile/lib/atomic_32.c b/arch/tile/lib/atomic_32.c
new file mode 100644
index 000000000000..8040b42a8eea
--- /dev/null
+++ b/arch/tile/lib/atomic_32.c
@@ -0,0 +1,330 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/cache.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <asm/atomic.h>
+#include <asm/futex.h>
+#include <arch/chip.h>
+
+/* See <asm/atomic_32.h> */
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+
+/*
+ * A block of memory containing locks for atomic ops. Each instance of this
+ * struct will be homed on a different CPU.
+ */
+struct atomic_locks_on_cpu {
+        int lock[ATOMIC_HASH_L2_SIZE];
+} __attribute__((aligned(ATOMIC_HASH_L2_SIZE * 4)));
+
+static DEFINE_PER_CPU(struct atomic_locks_on_cpu, atomic_lock_pool);
+
+/* The locks we'll use until __init_atomic_per_cpu is called. */
+static struct atomic_locks_on_cpu __initdata initial_atomic_locks;
+
+/* Hash into this vector to get a pointer to lock for the given atomic. */
+struct atomic_locks_on_cpu *atomic_lock_ptr[ATOMIC_HASH_L1_SIZE]
+        __write_once = {
+        [0 ... ATOMIC_HASH_L1_SIZE-1] (&initial_atomic_locks)
+};
+
+#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+/* This page is remapped on startup to be hash-for-home. */
+int atomic_locks[PAGE_SIZE / sizeof(int) /* Only ATOMIC_HASH_SIZE is used */]
+  __attribute__((aligned(PAGE_SIZE), section(".bss.page_aligned")));
+
+#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+static inline int *__atomic_hashed_lock(volatile void *v)
+{
+        /* NOTE: this code must match "sys_cmpxchg" in kernel/intvec.S */
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+        unsigned long i =
+                (unsigned long) v & ((PAGE_SIZE-1) & -sizeof(long long));
+        unsigned long n = __insn_crc32_32(0, i);
+
+        /* Grab high bits for L1 index. */
+        unsigned long l1_index = n >> ((sizeof(n) * 8) - ATOMIC_HASH_L1_SHIFT);
+        /* Grab low bits for L2 index. */
+        unsigned long l2_index = n & (ATOMIC_HASH_L2_SIZE - 1);
+
+        return &atomic_lock_ptr[l1_index]->lock[l2_index];
+#else
+        /*
+         * Use bits [3, 3 + ATOMIC_HASH_SHIFT) as the lock index.
+         * Using mm works here because atomic_locks is page aligned.
+         */
+        unsigned long ptr = __insn_mm((unsigned long)v >> 1,
+                                      (unsigned long)atomic_locks,
+                                      2, (ATOMIC_HASH_SHIFT + 2) - 1);
+        return (int *)ptr;
+#endif
+}
+
+#ifdef CONFIG_SMP
+/* Return whether the passed pointer is a valid atomic lock pointer. */
+static int is_atomic_lock(int *p)
+{
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+        int i;
+        for (i = 0; i < ATOMIC_HASH_L1_SIZE; ++i) {
+
+                if (p >= &atomic_lock_ptr[i]->lock[0] &&
+                    p < &atomic_lock_ptr[i]->lock[ATOMIC_HASH_L2_SIZE]) {
+                        return 1;
+                }
+        }
+        return 0;
+#else
+        return p >= &atomic_locks[0] && p < &atomic_locks[ATOMIC_HASH_SIZE];
+#endif
+}
+
+void __atomic_fault_unlock(int *irqlock_word)
+{
+        BUG_ON(!is_atomic_lock(irqlock_word));
+        BUG_ON(*irqlock_word != 1);
+        *irqlock_word = 0;
+}
+
+#endif /* CONFIG_SMP */
+
+static inline int *__atomic_setup(volatile void *v)
+{
+        /* Issue a load to the target to bring it into cache. */
+        *(volatile int *)v;
+        return __atomic_hashed_lock(v);
+}
+
+int _atomic_xchg(atomic_t *v, int n)
+{
+        return __atomic_xchg(&v->counter, __atomic_setup(v), n).val;
+}
+EXPORT_SYMBOL(_atomic_xchg);
+
+int _atomic_xchg_add(atomic_t *v, int i)
+{
+        return __atomic_xchg_add(&v->counter, __atomic_setup(v), i).val;
+}
+EXPORT_SYMBOL(_atomic_xchg_add);
+
+int _atomic_xchg_add_unless(atomic_t *v, int a, int u)
+{
+        /*
+         * Note: argument order is switched here since it is easier
+         * to use the first argument consistently as the "old value"
+         * in the assembly, as is done for _atomic_cmpxchg().
+         */
+        return __atomic_xchg_add_unless(&v->counter, __atomic_setup(v), u, a)
+                .val;
+}
+EXPORT_SYMBOL(_atomic_xchg_add_unless);
+
+int _atomic_cmpxchg(atomic_t *v, int o, int n)
+{
+        return __atomic_cmpxchg(&v->counter, __atomic_setup(v), o, n).val;
+}
+EXPORT_SYMBOL(_atomic_cmpxchg);
+
+unsigned long _atomic_or(volatile unsigned long *p, unsigned long mask)
+{
+        return __atomic_or((int *)p, __atomic_setup(p), mask).val;
+}
+EXPORT_SYMBOL(_atomic_or);
+
+unsigned long _atomic_andn(volatile unsigned long *p, unsigned long mask)
+{
+        return __atomic_andn((int *)p, __atomic_setup(p), mask).val;
+}
+EXPORT_SYMBOL(_atomic_andn);
+
+unsigned long _atomic_xor(volatile unsigned long *p, unsigned long mask)
+{
+        return __atomic_xor((int *)p, __atomic_setup(p), mask).val;
+}
+EXPORT_SYMBOL(_atomic_xor);
+
+
+u64 _atomic64_xchg(atomic64_t *v, u64 n)
+{
+        return __atomic64_xchg(&v->counter, __atomic_setup(v), n);
+}
+EXPORT_SYMBOL(_atomic64_xchg);
+
+u64 _atomic64_xchg_add(atomic64_t *v, u64 i)
+{
+        return __atomic64_xchg_add(&v->counter, __atomic_setup(v), i);
+}
+EXPORT_SYMBOL(_atomic64_xchg_add);
+
+u64 _atomic64_xchg_add_unless(atomic64_t *v, u64 a, u64 u)
+{
+        /*
+         * Note: argument order is switched here since it is easier
+         * to use the first argument consistently as the "old value"
+         * in the assembly, as is done for _atomic_cmpxchg().
+         */
+        return __atomic64_xchg_add_unless(&v->counter, __atomic_setup(v),
+                                          u, a);
+}
+EXPORT_SYMBOL(_atomic64_xchg_add_unless);
+
+u64 _atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n)
+{
+        return __atomic64_cmpxchg(&v->counter, __atomic_setup(v), o, n);
+}
+EXPORT_SYMBOL(_atomic64_cmpxchg);
+
+
+static inline int *__futex_setup(int __user *v)
+{
+        /*
+         * Issue a prefetch to the counter to bring it into cache.
+         * As for __atomic_setup, but we can't do a read into the L1
+         * since it might fault; instead we do a prefetch into the L2.
+         */
+        __insn_prefetch(v);
+        return __atomic_hashed_lock((int __force *)v);
+}
+
+struct __get_user futex_set(int __user *v, int i)
+{
+        return __atomic_xchg((int __force *)v, __futex_setup(v), i);
+}
+
+struct __get_user futex_add(int __user *v, int n)
+{
+        return __atomic_xchg_add((int __force *)v, __futex_setup(v), n);
+}
+
+struct __get_user futex_or(int __user *v, int n)
+{
+        return __atomic_or((int __force *)v, __futex_setup(v), n);
+}
+
+struct __get_user futex_andn(int __user *v, int n)
+{
+        return __atomic_andn((int __force *)v, __futex_setup(v), n);
+}
+
+struct __get_user futex_xor(int __user *v, int n)
+{
+        return __atomic_xor((int __force *)v, __futex_setup(v), n);
+}
+
+struct __get_user futex_cmpxchg(int __user *v, int o, int n)
+{
+        return __atomic_cmpxchg((int __force *)v, __futex_setup(v), o, n);
+}
+
+/*
+ * If any of the atomic or futex routines hit a bad address (not in
+ * the page tables at kernel PL) this routine is called.  The futex
+ * routines are never used on kernel space, and the normal atomics and
+ * bitops are never used on user space.  So a fault on kernel space
+ * must be fatal, but a fault on userspace is a futex fault and we
+ * need to return -EFAULT.  Note that the context this routine is
+ * invoked in is the context of the "_atomic_xxx()" routines called
+ * by the functions in this file.
+ */
+struct __get_user __atomic_bad_address(int __user *addr)
+{
+        if (unlikely(!access_ok(VERIFY_WRITE, addr, sizeof(int))))
+                panic("Bad address used for kernel atomic op: %p\n", addr);
+        return (struct __get_user) { .err = -EFAULT };
+}
+
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+static int __init noatomichash(char *str)
+{
+        pr_warning("noatomichash is deprecated.\n");
+        return 1;
+}
+__setup("noatomichash", noatomichash);
+#endif
+
+void __init __init_atomic_per_cpu(void)
+{
+#if ATOMIC_LOCKS_FOUND_VIA_TABLE()
+
+        unsigned int i;
+        int actual_cpu;
+
+        /*
+         * Before this is called from setup, we just have one lock for
+         * all atomic objects/operations.  Here we replace the
+         * elements of atomic_lock_ptr so that they point at per_cpu
+         * integers.  This seemingly over-complex approach stems from
+         * the fact that DEFINE_PER_CPU defines an entry for each cpu
+         * in the grid, not each cpu from 0..ATOMIC_HASH_SIZE-1.  But
+         * for efficient hashing of atomics to their locks we want a
+         * compile time constant power of 2 for the size of this
+         * table, so we use ATOMIC_HASH_SIZE.
+         *
+         * Here we populate atomic_lock_ptr from the per cpu
+         * atomic_lock_pool, interspersing by actual cpu so that
+         * subsequent elements are homed on consecutive cpus.
+         */
+
+        actual_cpu = cpumask_first(cpu_possible_mask);
+
+        for (i = 0; i < ATOMIC_HASH_L1_SIZE; ++i) {
+                /*
+                 * Preincrement to slightly bias against using cpu 0,
+                 * which has plenty of stuff homed on it already.
+                 */
+                actual_cpu = cpumask_next(actual_cpu, cpu_possible_mask);
+                if (actual_cpu >= nr_cpu_ids)
+                        actual_cpu = cpumask_first(cpu_possible_mask);
+
+                atomic_lock_ptr[i] = &per_cpu(atomic_lock_pool, actual_cpu);
+        }
+
+#else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+        /* Validate power-of-two and "bigger than cpus" assumption */
+        BUG_ON(ATOMIC_HASH_SIZE & (ATOMIC_HASH_SIZE-1));
+        BUG_ON(ATOMIC_HASH_SIZE < nr_cpu_ids);
+
+        /*
+         * On TILEPro we prefer to use a single hash-for-home
+         * page, since this means atomic operations are less
+         * likely to encounter a TLB fault and thus should
+         * in general perform faster.  You may wish to disable
+         * this in situations where few hash-for-home tiles
+         * are configured.
+         */
+        BUG_ON((unsigned long)atomic_locks % PAGE_SIZE != 0);
+
+        /* The locks must all fit on one page. */
+        BUG_ON(ATOMIC_HASH_SIZE * sizeof(int) > PAGE_SIZE);
+
+        /*
+         * We use the page offset of the atomic value's address as
+         * an index into atomic_locks, excluding the low 3 bits.
+         * That should not produce more indices than ATOMIC_HASH_SIZE.
+         */
+        BUG_ON((PAGE_SIZE >> 3) > ATOMIC_HASH_SIZE);
+
+#endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */
+
+        /* The futex code makes this assumption, so we validate it here. */
+        BUG_ON(sizeof(atomic_t) != sizeof(int));
+}
diff --git a/arch/tile/lib/atomic_asm_32.S b/arch/tile/lib/atomic_asm_32.S
new file mode 100644
index 000000000000..5a5514b77e78
--- /dev/null
+++ b/arch/tile/lib/atomic_asm_32.S
@@ -0,0 +1,196 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Support routines for atomic operations.  Each function takes:
+ *
+ * r0: address to manipulate
+ * r1: pointer to atomic lock guarding this operation (for FUTEX_LOCK_REG)
+ * r2: new value to write, or for cmpxchg/add_unless, value to compare against
+ * r3: (cmpxchg/xchg_add_unless) new value to write or add;
+ *     (atomic64 ops) high word of value to write
+ * r4/r5: (cmpxchg64/add_unless64) new value to write or add
+ *
+ * The 32-bit routines return a "struct __get_user" so that the futex code
+ * has an opportunity to return -EFAULT to the user if needed.
+ * The 64-bit routines just return a "long long" with the value,
+ * since they are only used from kernel space and don't expect to fault.
+ * Support for 16-bit ops is included in the framework but we don't provide
+ * any (x86_64 has an atomic_inc_short(), so we might want to some day).
+ *
+ * Note that the caller is advised to issue a suitable L1 or L2
+ * prefetch on the address being manipulated to avoid extra stalls.
+ * In addition, the hot path is on two icache lines, and we start with
+ * a jump to the second line to make sure they are both in cache so
+ * that we never stall waiting on icache fill while holding the lock.
+ * (This doesn't work out with most 64-bit ops, since they consume
+ * too many bundles, so may take an extra i-cache stall.)
+ *
+ * These routines set the INTERRUPT_CRITICAL_SECTION bit, just
+ * like sys_cmpxchg(), so that NMIs like PERF_COUNT will not interrupt
+ * the code, just page faults.
+ *
+ * If the load or store faults in a way that can be directly fixed in
+ * the do_page_fault_ics() handler (e.g. a vmalloc reference) we fix it
+ * directly, return to the instruction that faulted, and retry it.
+ *
+ * If the load or store faults in a way that potentially requires us
+ * to release the atomic lock, then retry (e.g. a migrating PTE), we
+ * reset the PC in do_page_fault_ics() to the "tns" instruction so
+ * that on return we will reacquire the lock and restart the op.  We
+ * are somewhat overloading the exception_table_entry notion by doing
+ * this, since those entries are not normally used for migrating PTEs.
+ *
+ * If the main page fault handler discovers a bad address, it will see
+ * the PC pointing to the "tns" instruction (due to the earlier
+ * exception_table_entry processing in do_page_fault_ics), and
+ * re-reset the PC to the fault handler, atomic_bad_address(), which
+ * effectively takes over from the atomic op and can either return a
+ * bad "struct __get_user" (for user addresses) or can just panic (for
+ * bad kernel addresses).
+ *
+ * Note that if the value we would store is the same as what we
+ * loaded, we bypass the load.  Other platforms with true atomics can
+ * make the guarantee that a non-atomic __clear_bit(), for example,
+ * can safely race with an atomic test_and_set_bit(); this example is
+ * from bit_spinlock.h in slub_lock() / slub_unlock().  We can't do
+ * that on Tile since the "atomic" op is really just a
+ * read/modify/write, and can race with the non-atomic
+ * read/modify/write.  However, if we can short-circuit the write when
+ * it is not needed, in the atomic case, we avoid the race.
+ */
+
+#include <linux/linkage.h>
+#include <asm/atomic.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+
+        .section .text.atomic,"ax"
+ENTRY(__start_atomic_asm_code)
+
+        .macro  atomic_op, name, bitwidth, body
+        .align  64
+STD_ENTRY_SECTION(__atomic\name, .text.atomic)
+        {
+         movei  r24, 1
+         j      4f              /* branch to second cache line */
+        }
+1:      {
+         .ifc \bitwidth,16
+         lh     r22, r0
+         .else
+         lw     r22, r0
+         addi   r28, r0, 4
+         .endif
+        }
+        .ifc \bitwidth,64
+        lw      r23, r28
+        .endif
+        \body /* set r24, and r25 if 64-bit */
+        {
+         seq    r26, r22, r24
+         seq    r27, r23, r25
+        }
+        .ifc \bitwidth,64
+        bbnst   r27, 2f
+        .endif
+        bbs     r26, 3f         /* skip write-back if it's the same value */
+2:      {
+         .ifc \bitwidth,16
+         sh     r0, r24
+         .else
+         sw     r0, r24
+         .endif
+        }
+        .ifc \bitwidth,64
+        sw      r28, r25
+        .endif
+        mf
+3:      {
+         move   r0, r22
+         .ifc \bitwidth,64
+         move   r1, r23
+         .else
+         move   r1, zero
+         .endif
+         sw     ATOMIC_LOCK_REG_NAME, zero
+        }
+        mtspr   INTERRUPT_CRITICAL_SECTION, zero
+        jrp     lr
+4:      {
+         move   ATOMIC_LOCK_REG_NAME, r1
+         mtspr  INTERRUPT_CRITICAL_SECTION, r24
+        }
+#ifndef CONFIG_SMP
+        j       1b              /* no atomic locks */
+#else
+        {
+         tns    r21, ATOMIC_LOCK_REG_NAME
+         moveli r23, 2048       /* maximum backoff time in cycles */
+        }
+        {
+         bzt    r21, 1b         /* branch if lock acquired */
+         moveli r25, 32         /* starting backoff time in cycles */
+        }
+5:      mtspr   INTERRUPT_CRITICAL_SECTION, zero
+        mfspr   r26, CYCLE_LOW  /* get start point for this backoff */
+6:      mfspr   r22, CYCLE_LOW  /* test to see if we've backed off enough */
+        sub     r22, r22, r26
+        slt     r22, r22, r25
+        bbst    r22, 6b
+        {
+         mtspr  INTERRUPT_CRITICAL_SECTION, r24
+         shli   r25, r25, 1     /* double the backoff; retry the tns */
+        }
+        {
+         tns    r21, ATOMIC_LOCK_REG_NAME
+         slt    r26, r23, r25   /* is the proposed backoff too big? */
+        }
+        {
+         bzt    r21, 1b         /* branch if lock acquired */
+         mvnz   r25, r26, r23
+        }
+        j       5b
+#endif
+        STD_ENDPROC(__atomic\name)
+        .ifc \bitwidth,32
+        .pushsection __ex_table,"a"
+        .word   1b, __atomic\name
+        .word   2b, __atomic\name
+        .word   __atomic\name, __atomic_bad_address
+        .popsection
+        .endif
+        .endm
+
+atomic_op _cmpxchg, 32, "seq r26, r22, r2; { bbns r26, 3f; move r24, r3 }"
+atomic_op _xchg, 32, "move r24, r2"
+atomic_op _xchg_add, 32, "add r24, r22, r2"
+atomic_op _xchg_add_unless, 32, \
+        "sne r26, r22, r2; { bbns r26, 3f; add r24, r22, r3 }"
+atomic_op _or, 32, "or r24, r22, r2"
+atomic_op _andn, 32, "nor r2, r2, zero; and r24, r22, r2"
+atomic_op _xor, 32, "xor r24, r22, r2"
+
+atomic_op 64_cmpxchg, 64, "{ seq r26, r22, r2; seq r27, r23, r3 }; \
+        { bbns r26, 3f; move r24, r4 }; { bbns r27, 3f; move r25, r5 }"
+atomic_op 64_xchg, 64, "{ move r24, r2; move r25, r3 }"
+atomic_op 64_xchg_add, 64, "{ add r24, r22, r2; add r25, r23, r3 }; \
+        slt_u r26, r24, r22; add r25, r25, r26"
+atomic_op 64_xchg_add_unless, 64, \
+        "{ sne r26, r22, r2; sne r27, r23, r3 }; \
+        { bbns r26, 3f; add r24, r22, r4 }; \
+        { bbns r27, 3f; add r25, r23, r5 }; \
+        slt_u r26, r24, r22; add r25, r25, r26"
+
+        jrp     lr              /* happy backtracer */
+
+ENTRY(__end_atomic_asm_code)
diff --git a/arch/tile/lib/cacheflush.c b/arch/tile/lib/cacheflush.c
new file mode 100644
index 000000000000..11b6164c2097
--- /dev/null
+++ b/arch/tile/lib/cacheflush.c
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <asm/page.h>
+#include <asm/cacheflush.h>
+#include <arch/icache.h>
+
+
+void __flush_icache_range(unsigned long start, unsigned long end)
+{
+        invalidate_icache((const void *)start, end - start, PAGE_SIZE);
+}
diff --git a/arch/tile/lib/checksum.c b/arch/tile/lib/checksum.c
new file mode 100644
index 000000000000..e4bab5bd3f31
--- /dev/null
+++ b/arch/tile/lib/checksum.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ * Support code for the main lib/checksum.c.
+ */
+
+#include <net/checksum.h>
+#include <linux/module.h>
+
+static inline unsigned int longto16(unsigned long x)
+{
+        unsigned long ret;
+#ifdef __tilegx__
+        ret = __insn_v2sadu(x, 0);
+        ret = __insn_v2sadu(ret, 0);
+#else
+        ret = __insn_sadh_u(x, 0);
+        ret = __insn_sadh_u(ret, 0);
+#endif
+        return ret;
+}
+
+__wsum do_csum(const unsigned char *buff, int len)
+{
+        int odd, count;
+        unsigned long result = 0;
+
+        if (len <= 0)
+                goto out;
+        odd = 1 & (unsigned long) buff;
+        if (odd) {
+                result = (*buff << 8);
+                len--;
+                buff++;
+        }
+        count = len >> 1;               /* nr of 16-bit words.. */
+        if (count) {
+                if (2 & (unsigned long) buff) {
+                        result += *(const unsigned short *)buff;
+                        count--;
+                        len -= 2;
+                        buff += 2;
+                }
+                count >>= 1;            /* nr of 32-bit words.. */
+                if (count) {
+#ifdef __tilegx__
+                        if (4 & (unsigned long) buff) {
+                                unsigned int w = *(const unsigned int *)buff;
+                                result = __insn_v2sadau(result, w, 0);
+                                count--;
+                                len -= 4;
+                                buff += 4;
+                        }
+                        count >>= 1;            /* nr of 64-bit words.. */
+#endif
+
+                        /*
+                         * This algorithm could wrap around for very
+                         * large buffers, but those should be impossible.
+                         */
+                        BUG_ON(count >= 65530);
+
+                        while (count) {
+                                unsigned long w = *(const unsigned long *)buff;
+                                count--;
+                                buff += sizeof(w);
+#ifdef __tilegx__
+                                result = __insn_v2sadau(result, w, 0);
+#else
+                                result = __insn_sadah_u(result, w, 0);
+#endif
+                        }
+#ifdef __tilegx__
+                        if (len & 4) {
+                                unsigned int w = *(const unsigned int *)buff;
+                                result = __insn_v2sadau(result, w, 0);
+                                buff += 4;
+                        }
+#endif
+                }
+                if (len & 2) {
+                        result += *(const unsigned short *) buff;
+                        buff += 2;
+                }
+        }
+        if (len & 1)
+                result += *buff;
+        result = longto16(result);
+        if (odd)
+                result = swab16(result);
+out:
+        return result;
+}
diff --git a/arch/tile/lib/cpumask.c b/arch/tile/lib/cpumask.c
new file mode 100644
index 000000000000..fdc403614d12
--- /dev/null
+++ b/arch/tile/lib/cpumask.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/cpumask.h>
+#include <linux/ctype.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+/*
+ * Allow cropping out bits beyond the end of the array.
+ * Move to "lib" directory if more clients want to use this routine.
+ */
+int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
+{
+        unsigned a, b;
+
+        bitmap_zero(maskp, nmaskbits);
+        do {
+                if (!isdigit(*bp))
+                        return -EINVAL;
+                a = simple_strtoul(bp, (char **)&bp, 10);
+                b = a;
+                if (*bp == '-') {
+                        bp++;
+                        if (!isdigit(*bp))
+                                return -EINVAL;
+                        b = simple_strtoul(bp, (char **)&bp, 10);
+                }
+                if (!(a <= b))
+                        return -EINVAL;
+                if (b >= nmaskbits)
+                        b = nmaskbits-1;
+                while (a <= b) {
+                        set_bit(a, maskp);
+                        a++;
+                }
+                if (*bp == ',')
+                        bp++;
+        } while (*bp != '\0' && *bp != '\n');
+        return 0;
+}
diff --git a/arch/tile/lib/delay.c b/arch/tile/lib/delay.c
new file mode 100644
index 000000000000..5801b03c13ef
--- /dev/null
+++ b/arch/tile/lib/delay.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/thread_info.h>
+#include <asm/fixmap.h>
+#include <hv/hypervisor.h>
+
+void __udelay(unsigned long usecs)
+{
+        hv_nanosleep(usecs * 1000);
+}
+EXPORT_SYMBOL(__udelay);
+
+void __ndelay(unsigned long nsecs)
+{
+        hv_nanosleep(nsecs);
+}
+EXPORT_SYMBOL(__ndelay);
+
+/* FIXME: should be declared in a header somewhere. */
+EXPORT_SYMBOL(__delay);
diff --git a/arch/tile/lib/exports.c b/arch/tile/lib/exports.c
new file mode 100644
index 000000000000..ce5dbf56578f
--- /dev/null
+++ b/arch/tile/lib/exports.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Exports from assembler code and from libtile-cc.
+ */
+
+#include <linux/module.h>
+
+/* arch/tile/lib/usercopy.S */
+#include <linux/uaccess.h>
+EXPORT_SYMBOL(__get_user_1);
+EXPORT_SYMBOL(__get_user_2);
+EXPORT_SYMBOL(__get_user_4);
+EXPORT_SYMBOL(__get_user_8);
+EXPORT_SYMBOL(__put_user_1);
+EXPORT_SYMBOL(__put_user_2);
+EXPORT_SYMBOL(__put_user_4);
+EXPORT_SYMBOL(__put_user_8);
+EXPORT_SYMBOL(strnlen_user_asm);
+EXPORT_SYMBOL(strncpy_from_user_asm);
+EXPORT_SYMBOL(clear_user_asm);
+
+/* arch/tile/kernel/entry.S */
+#include <linux/kernel.h>
+#include <asm/processor.h>
+EXPORT_SYMBOL(current_text_addr);
+EXPORT_SYMBOL(dump_stack);
+
+/* arch/tile/lib/, various memcpy files */
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(__copy_to_user_inatomic);
+EXPORT_SYMBOL(__copy_from_user_inatomic);
+EXPORT_SYMBOL(__copy_from_user_zeroing);
+#ifdef __tilegx__
+EXPORT_SYMBOL(__copy_in_user_inatomic);
+#endif
+
+/* hypervisor glue */
+#include <hv/hypervisor.h>
+EXPORT_SYMBOL(hv_dev_open);
+EXPORT_SYMBOL(hv_dev_pread);
+EXPORT_SYMBOL(hv_dev_pwrite);
+EXPORT_SYMBOL(hv_dev_preada);
+EXPORT_SYMBOL(hv_dev_pwritea);
+EXPORT_SYMBOL(hv_dev_poll);
+EXPORT_SYMBOL(hv_dev_poll_cancel);
+EXPORT_SYMBOL(hv_dev_close);
+EXPORT_SYMBOL(hv_sysconf);
+EXPORT_SYMBOL(hv_confstr);
+
+/* libgcc.a */
+uint32_t __udivsi3(uint32_t dividend, uint32_t divisor);
+EXPORT_SYMBOL(__udivsi3);
+int32_t __divsi3(int32_t dividend, int32_t divisor);
+EXPORT_SYMBOL(__divsi3);
+uint64_t __udivdi3(uint64_t dividend, uint64_t divisor);
+EXPORT_SYMBOL(__udivdi3);
+int64_t __divdi3(int64_t dividend, int64_t divisor);
+EXPORT_SYMBOL(__divdi3);
+uint32_t __umodsi3(uint32_t dividend, uint32_t divisor);
+EXPORT_SYMBOL(__umodsi3);
+int32_t __modsi3(int32_t dividend, int32_t divisor);
+EXPORT_SYMBOL(__modsi3);
+uint64_t __umoddi3(uint64_t dividend, uint64_t divisor);
+EXPORT_SYMBOL(__umoddi3);
+int64_t __moddi3(int64_t dividend, int64_t divisor);
+EXPORT_SYMBOL(__moddi3);
+#ifndef __tilegx__
+uint64_t __ll_mul(uint64_t n0, uint64_t n1);
+EXPORT_SYMBOL(__ll_mul);
+int64_t __muldi3(int64_t, int64_t);
+EXPORT_SYMBOL(__muldi3);
+uint64_t __lshrdi3(uint64_t, unsigned int);
+EXPORT_SYMBOL(__lshrdi3);
+#endif
diff --git a/arch/tile/lib/mb_incoherent.S b/arch/tile/lib/mb_incoherent.S
new file mode 100644
index 000000000000..989ad7b68d5a
--- /dev/null
+++ b/arch/tile/lib/mb_incoherent.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Assembly code for invoking the HV's fence_incoherent syscall.
+ */
+
+#include <linux/linkage.h>
+#include <hv/syscall_public.h>
+#include <arch/abi.h>
+#include <arch/chip.h>
+
+#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS()
+
+/*
+ * Invoke the hypervisor's fence_incoherent syscall, which guarantees
+ * that all victims for cachelines homed on this tile have reached memory.
+ */
+STD_ENTRY(__mb_incoherent)
+        moveli TREG_SYSCALL_NR_NAME, HV_SYS_fence_incoherent
+        swint2
+        jrp lr
+        STD_ENDPROC(__mb_incoherent)
+
+#endif
diff --git a/arch/tile/lib/memchr_32.c b/arch/tile/lib/memchr_32.c
new file mode 100644
index 000000000000..6235283b4859
--- /dev/null
+++ b/arch/tile/lib/memchr_32.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+void *memchr(const void *s, int c, size_t n)
+{
+        /* Get an aligned pointer. */
+        const uintptr_t s_int = (uintptr_t) s;
+        const uint32_t *p = (const uint32_t *)(s_int & -4);
+
+        /* Create four copies of the byte for which we are looking. */
+        const uint32_t goal = 0x01010101 * (uint8_t) c;
+
+        /* Read the first word, but munge it so that bytes before the array
+         * will not match goal.
+         *
+         * Note that this shift count expression works because we know
+         * shift counts are taken mod 32.
+         */
+        const uint32_t before_mask = (1 << (s_int << 3)) - 1;
+        uint32_t v = (*p | before_mask) ^ (goal & before_mask);
+
+        /* Compute the address of the last byte. */
+        const char *const last_byte_ptr = (const char *)s + n - 1;
+
+        /* Compute the address of the word containing the last byte. */
+        const uint32_t *const last_word_ptr =
+            (const uint32_t *)((uintptr_t) last_byte_ptr & -4);
+
+        uint32_t bits;
+        char *ret;
+
+        if (__builtin_expect(n == 0, 0)) {
+                /* Don't dereference any memory if the array is empty. */
+                return NULL;
+        }
+
+        while ((bits = __insn_seqb(v, goal)) == 0) {
+                if (__builtin_expect(p == last_word_ptr, 0)) {
+                        /* We already read the last word in the array,
+                         * so give up.
+                         */
+                        return NULL;
+                }
+                v = *++p;
+        }
+
+        /* We found a match, but it might be in a byte past the end
+         * of the array.
+         */
+        ret = ((char *)p) + (__insn_ctz(bits) >> 3);
+        return (ret <= last_byte_ptr) ? ret : NULL;
+}
+EXPORT_SYMBOL(memchr);
diff --git a/arch/tile/lib/memcpy_32.S b/arch/tile/lib/memcpy_32.S
new file mode 100644
index 000000000000..30c3b7ebb55d
--- /dev/null
+++ b/arch/tile/lib/memcpy_32.S
@@ -0,0 +1,616 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This file shares the implementation of the userspace memcpy and
+ * the kernel's memcpy, copy_to_user and copy_from_user.
+ */
+
+#include <arch/chip.h>
+
+
+#include <linux/linkage.h>
+
+/* On TILE64, we wrap these functions via arch/tile/lib/memcpy_tile64.c */
+#if !CHIP_HAS_COHERENT_LOCAL_CACHE()
+#define memcpy __memcpy_asm
+#define __copy_to_user_inatomic __copy_to_user_inatomic_asm
+#define __copy_from_user_inatomic __copy_from_user_inatomic_asm
+#define __copy_from_user_zeroing __copy_from_user_zeroing_asm
+#endif
+
+#define IS_MEMCPY         0
+#define IS_COPY_FROM_USER  1
+#define IS_COPY_FROM_USER_ZEROING  2
+#define IS_COPY_TO_USER   -1
+
+        .section .text.memcpy_common, "ax"
+        .align 64
+
+/* Use this to preface each bundle that can cause an exception so
+ * the kernel can clean up properly. The special cleanup code should
+ * not use these, since it knows what it is doing.
+ */
+#define EX \
+        .pushsection __ex_table, "a"; \
+        .word 9f, memcpy_common_fixup; \
+        .popsection; \
+        9
+
+
+/* __copy_from_user_inatomic takes the kernel target address in r0,
+ * the user source in r1, and the bytes to copy in r2.
+ * It returns the number of uncopiable bytes (hopefully zero) in r0.
+ */
+ENTRY(__copy_from_user_inatomic)
+.type __copy_from_user_inatomic, @function
+        FEEDBACK_ENTER_EXPLICIT(__copy_from_user_inatomic, \
+          .text.memcpy_common, \
+          .Lend_memcpy_common - __copy_from_user_inatomic)
+        { movei r29, IS_COPY_FROM_USER; j memcpy_common }
+        .size __copy_from_user_inatomic, . - __copy_from_user_inatomic
+
+/* __copy_from_user_zeroing is like __copy_from_user_inatomic, but
+ * any uncopiable bytes are zeroed in the target.
+ */
+ENTRY(__copy_from_user_zeroing)
+.type __copy_from_user_zeroing, @function
+        FEEDBACK_REENTER(__copy_from_user_inatomic)
+        { movei r29, IS_COPY_FROM_USER_ZEROING; j memcpy_common }
+        .size __copy_from_user_zeroing, . - __copy_from_user_zeroing
+
+/* __copy_to_user_inatomic takes the user target address in r0,
+ * the kernel source in r1, and the bytes to copy in r2.
+ * It returns the number of uncopiable bytes (hopefully zero) in r0.
+ */
+ENTRY(__copy_to_user_inatomic)
+.type __copy_to_user_inatomic, @function
+        FEEDBACK_REENTER(__copy_from_user_inatomic)
+        { movei r29, IS_COPY_TO_USER; j memcpy_common }
+        .size __copy_to_user_inatomic, . - __copy_to_user_inatomic
+
+ENTRY(memcpy)
+.type memcpy, @function
+        FEEDBACK_REENTER(__copy_from_user_inatomic)
+        { movei r29, IS_MEMCPY }
+        .size memcpy, . - memcpy
+        /* Fall through */
+
+        .type memcpy_common, @function
+memcpy_common:
+        /* On entry, r29 holds one of the IS_* macro values from above. */
+
+
+        /* r0 is the dest, r1 is the source, r2 is the size. */
+
+        /* Save aside original dest so we can return it at the end. */
+        { sw sp, lr; move r23, r0; or r4, r0, r1 }
+
+        /* Check for an empty size. */
+        { bz r2, .Ldone; andi r4, r4, 3 }
+
+        /* Save aside original values in case of a fault. */
+        { move r24, r1; move r25, r2 }
+        move r27, lr
+
+        /* Check for an unaligned source or dest. */
+        { bnz r4, .Lcopy_unaligned_maybe_many; addli r4, r2, -256 }
+
+.Lcheck_aligned_copy_size:
+        /* If we are copying < 256 bytes, branch to simple case. */
+        { blzt r4, .Lcopy_8_check; slti_u r8, r2, 8 }
+
+        /* Copying >= 256 bytes, so jump to complex prefetching loop. */
+        { andi r6, r1, 63; j .Lcopy_many }
+
+/*
+ *
+ * Aligned 4 byte at a time copy loop
+ *
+ */
+
+.Lcopy_8_loop:
+        /* Copy two words at a time to hide load latency. */
+EX:     { lw r3, r1; addi r1, r1, 4; slti_u r8, r2, 16 }
+EX:     { lw r4, r1; addi r1, r1, 4 }
+EX:     { sw r0, r3; addi r0, r0, 4; addi r2, r2, -4 }
+EX:     { sw r0, r4; addi r0, r0, 4; addi r2, r2, -4 }
+.Lcopy_8_check:
+        { bzt r8, .Lcopy_8_loop; slti_u r4, r2, 4 }
+
+        /* Copy odd leftover word, if any. */
+        { bnzt r4, .Lcheck_odd_stragglers }
+EX:     { lw r3, r1; addi r1, r1, 4 }
+EX:     { sw r0, r3; addi r0, r0, 4; addi r2, r2, -4 }
+
+.Lcheck_odd_stragglers:
+        { bnz r2, .Lcopy_unaligned_few }
+
+.Ldone:
+        /* For memcpy return original dest address, else zero. */
+        { mz r0, r29, r23; jrp lr }
+
+
+/*
+ *
+ * Prefetching multiple cache line copy handler (for large transfers).
+ *
+ */
+
+        /* Copy words until r1 is cache-line-aligned. */
+.Lalign_loop:
+EX:     { lw r3, r1; addi r1, r1, 4 }
+        { andi r6, r1, 63 }
+EX:     { sw r0, r3; addi r0, r0, 4; addi r2, r2, -4 }
+.Lcopy_many:
+        { bnzt r6, .Lalign_loop; addi r9, r0, 63 }
+
+        { addi r3, r1, 60; andi r9, r9, -64 }
+
+#if CHIP_HAS_WH64()
+        /* No need to prefetch dst, we'll just do the wh64
+         * right before we copy a line.
+         */
+#endif
+
+EX:     { lw r5, r3; addi r3, r3, 64; movei r4, 1 }
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bnzt zero, .; move r27, lr }
+EX:     { lw r6, r3; addi r3, r3, 64 }
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bnzt zero, . }
+EX:     { lw r7, r3; addi r3, r3, 64 }
+#if !CHIP_HAS_WH64()
+        /* Prefetch the dest */
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bnzt zero, . }
+        /* Use a real load to cause a TLB miss if necessary.  We aren't using
+         * r28, so this should be fine.
+         */
+EX:     { lw r28, r9; addi r9, r9, 64 }
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bnzt zero, . }
+        { prefetch r9; addi r9, r9, 64 }
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bnzt zero, . }
+        { prefetch r9; addi r9, r9, 64 }
+#endif
+        /* Intentionally stall for a few cycles to leave L2 cache alone. */
+        { bz zero, .Lbig_loop2 }
+
+        /* On entry to this loop:
+         * - r0 points to the start of dst line 0
+         * - r1 points to start of src line 0
+         * - r2 >= (256 - 60), only the first time the loop trips.
+         * - r3 contains r1 + 128 + 60    [pointer to end of source line 2]
+         *   This is our prefetch address. When we get near the end
+         *   rather than prefetching off the end this is changed to point
+         *   to some "safe" recently loaded address.
+         * - r5 contains *(r1 + 60)       [i.e. last word of source line 0]
+         * - r6 contains *(r1 + 64 + 60)  [i.e. last word of source line 1]
+         * - r9 contains ((r0 + 63) & -64)
+         *     [start of next dst cache line.]
+         */
+
+.Lbig_loop:
+        { jal .Lcopy_line2; add r15, r1, r2 }
+
+.Lbig_loop2:
+        /* Copy line 0, first stalling until r5 is ready. */
+EX:     { move r12, r5; lw r16, r1 }
+        { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 }
+        /* Prefetch several lines ahead. */
+EX:     { lw r5, r3; addi r3, r3, 64 }
+        { jal .Lcopy_line }
+
+        /* Copy line 1, first stalling until r6 is ready. */
+EX:     { move r12, r6; lw r16, r1 }
+        { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 }
+        /* Prefetch several lines ahead. */
+EX:     { lw r6, r3; addi r3, r3, 64 }
+        { jal .Lcopy_line }
+
+        /* Copy line 2, first stalling until r7 is ready. */
+EX:     { move r12, r7; lw r16, r1 }
+        { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 }
+        /* Prefetch several lines ahead. */
+EX:     { lw r7, r3; addi r3, r3, 64 }
+        /* Use up a caches-busy cycle by jumping back to the top of the
+         * loop. Might as well get it out of the way now.
+         */
+        { j .Lbig_loop }
+
+
+        /* On entry:
+         * - r0 points to the destination line.
+         * - r1 points to the source line.
+         * - r3 is the next prefetch address.
+         * - r9 holds the last address used for wh64.
+         * - r12 = WORD_15
+         * - r16 = WORD_0.
+         * - r17 == r1 + 16.
+         * - r27 holds saved lr to restore.
+         *
+         * On exit:
+         * - r0 is incremented by 64.
+         * - r1 is incremented by 64, unless that would point to a word
+         *   beyond the end of the source array, in which case it is redirected
+         *   to point to an arbitrary word already in the cache.
+         * - r2 is decremented by 64.
+         * - r3 is unchanged, unless it points to a word beyond the
+         *   end of the source array, in which case it is redirected
+         *   to point to an arbitrary word already in the cache.
+         *   Redirecting is OK since if we are that close to the end
+         *   of the array we will not come back to this subroutine
+         *   and use the contents of the prefetched address.
+         * - r4 is nonzero iff r2 >= 64.
+         * - r9 is incremented by 64, unless it points beyond the
+         *   end of the last full destination cache line, in which
+         *   case it is redirected to a "safe address" that can be
+         *   clobbered (sp - 64)
+         * - lr contains the value in r27.
+         */
+
+/* r26 unused */
+
+.Lcopy_line:
+        /* TODO: when r3 goes past the end, we would like to redirect it
+         * to prefetch the last partial cache line (if any) just once, for the
+         * benefit of the final cleanup loop. But we don't want to
+         * prefetch that line more than once, or subsequent prefetches
+         * will go into the RTF. But then .Lbig_loop should unconditionally
+         * branch to top of loop to execute final prefetch, and its
+         * nop should become a conditional branch.
+         */
+
+        /* We need two non-memory cycles here to cover the resources
+         * used by the loads initiated by the caller.
+         */
+        { add r15, r1, r2 }
+.Lcopy_line2:
+        { slt_u r13, r3, r15; addi r17, r1, 16 }
+
+        /* NOTE: this will stall for one cycle as L1 is busy. */
+
+        /* Fill second L1D line. */
+EX:     { lw r17, r17; addi r1, r1, 48; mvz r3, r13, r1 } /* r17 = WORD_4 */
+
+#if CHIP_HAS_WH64()
+        /* Prepare destination line for writing. */
+EX:     { wh64 r9; addi r9, r9, 64 }
+#else
+        /* Prefetch dest line */
+        { prefetch r9; addi r9, r9, 64 }
+#endif
+        /* Load seven words that are L1D hits to cover wh64 L2 usage. */
+
+        /* Load the three remaining words from the last L1D line, which
+         * we know has already filled the L1D.
+         */
+EX:     { lw r4, r1;  addi r1, r1, 4;   addi r20, r1, 16 }   /* r4 = WORD_12 */
+EX:     { lw r8, r1;  addi r1, r1, 4;   slt_u r13, r20, r15 }/* r8 = WORD_13 */
+EX:     { lw r11, r1; addi r1, r1, -52; mvz r20, r13, r1 }  /* r11 = WORD_14 */
+
+        /* Load the three remaining words from the first L1D line, first
+         * stalling until it has filled by "looking at" r16.
+         */
+EX:     { lw r13, r1; addi r1, r1, 4; move zero, r16 }   /* r13 = WORD_1 */
+EX:     { lw r14, r1; addi r1, r1, 4 }                   /* r14 = WORD_2 */
+EX:     { lw r15, r1; addi r1, r1, 8; addi r10, r0, 60 } /* r15 = WORD_3 */
+
+        /* Load second word from the second L1D line, first
+         * stalling until it has filled by "looking at" r17.
+         */
+EX:     { lw r19, r1; addi r1, r1, 4; move zero, r17 }  /* r19 = WORD_5 */
+
+        /* Store last word to the destination line, potentially dirtying it
+         * for the first time, which keeps the L2 busy for two cycles.
+         */
+EX:     { sw r10, r12 }                                 /* store(WORD_15) */
+
+        /* Use two L1D hits to cover the sw L2 access above. */
+EX:     { lw r10, r1; addi r1, r1, 4 }                  /* r10 = WORD_6 */
+EX:     { lw r12, r1; addi r1, r1, 4 }                  /* r12 = WORD_7 */
+
+        /* Fill third L1D line. */
+EX:     { lw r18, r1; addi r1, r1, 4 }                  /* r18 = WORD_8 */
+
+        /* Store first L1D line. */
+EX:     { sw r0, r16; addi r0, r0, 4; add r16, r0, r2 } /* store(WORD_0) */
+EX:     { sw r0, r13; addi r0, r0, 4; andi r16, r16, -64 } /* store(WORD_1) */
+EX:     { sw r0, r14; addi r0, r0, 4; slt_u r16, r9, r16 } /* store(WORD_2) */
+#if CHIP_HAS_WH64()
+EX:     { sw r0, r15; addi r0, r0, 4; addi r13, sp, -64 } /* store(WORD_3) */
+#else
+        /* Back up the r9 to a cache line we are already storing to
+         * if it gets past the end of the dest vector.  Strictly speaking,
+         * we don't need to back up to the start of a cache line, but it's free
+         * and tidy, so why not?
+         */
+EX:     { sw r0, r15; addi r0, r0, 4; andi r13, r0, -64 } /* store(WORD_3) */
+#endif
+        /* Store second L1D line. */
+EX:     { sw r0, r17; addi r0, r0, 4; mvz r9, r16, r13 }/* store(WORD_4) */
+EX:     { sw r0, r19; addi r0, r0, 4 }                  /* store(WORD_5) */
+EX:     { sw r0, r10; addi r0, r0, 4 }                  /* store(WORD_6) */
+EX:     { sw r0, r12; addi r0, r0, 4 }                  /* store(WORD_7) */
+
+EX:     { lw r13, r1; addi r1, r1, 4; move zero, r18 }  /* r13 = WORD_9 */
+EX:     { lw r14, r1; addi r1, r1, 4 }                  /* r14 = WORD_10 */
+EX:     { lw r15, r1; move r1, r20   }                  /* r15 = WORD_11 */
+
+        /* Store third L1D line. */
+EX:     { sw r0, r18; addi r0, r0, 4 }                  /* store(WORD_8) */
+EX:     { sw r0, r13; addi r0, r0, 4 }                  /* store(WORD_9) */
+EX:     { sw r0, r14; addi r0, r0, 4 }                  /* store(WORD_10) */
+EX:     { sw r0, r15; addi r0, r0, 4 }                  /* store(WORD_11) */
+
+        /* Store rest of fourth L1D line. */
+EX:     { sw r0, r4;  addi r0, r0, 4 }                  /* store(WORD_12) */
+        {
+EX:     sw r0, r8                                       /* store(WORD_13) */
+        addi r0, r0, 4
+        /* Will r2 be > 64 after we subtract 64 below? */
+        shri r4, r2, 7
+        }
+        {
+EX:     sw r0, r11                                      /* store(WORD_14) */
+        addi r0, r0, 8
+        /* Record 64 bytes successfully copied. */
+        addi r2, r2, -64
+        }
+
+        { jrp lr; move lr, r27 }
+
+        /* Convey to the backtrace library that the stack frame is size
+         * zero, and the real return address is on the stack rather than
+         * in 'lr'.
+         */
+        { info 8 }
+
+        .align 64
+.Lcopy_unaligned_maybe_many:
+        /* Skip the setup overhead if we aren't copying many bytes. */
+        { slti_u r8, r2, 20; sub r4, zero, r0 }
+        { bnzt r8, .Lcopy_unaligned_few; andi r4, r4, 3 }
+        { bz r4, .Ldest_is_word_aligned; add r18, r1, r2 }
+
+/*
+ *
+ * unaligned 4 byte at a time copy handler.
+ *
+ */
+
+        /* Copy single bytes until r0 == 0 mod 4, so we can store words. */
+.Lalign_dest_loop:
+EX:     { lb_u r3, r1; addi r1, r1, 1; addi r4, r4, -1 }
+EX:     { sb r0, r3;   addi r0, r0, 1; addi r2, r2, -1 }
+        { bnzt r4, .Lalign_dest_loop; andi r3, r1, 3 }
+
+        /* If source and dest are now *both* aligned, do an aligned copy. */
+        { bz r3, .Lcheck_aligned_copy_size; addli r4, r2, -256 }
+
+.Ldest_is_word_aligned:
+
+#if CHIP_HAS_DWORD_ALIGN()
+EX:     { andi r8, r0, 63; lwadd_na r6, r1, 4}
+        { slti_u r9, r2, 64; bz r8, .Ldest_is_L2_line_aligned }
+
+        /* This copies unaligned words until either there are fewer
+         * than 4 bytes left to copy, or until the destination pointer
+         * is cache-aligned, whichever comes first.
+         *
+         * On entry:
+         * - r0 is the next store address.
+         * - r1 points 4 bytes past the load address corresponding to r0.
+         * - r2 >= 4
+         * - r6 is the next aligned word loaded.
+         */
+.Lcopy_unaligned_src_words:
+EX:     { lwadd_na r7, r1, 4; slti_u r8, r2, 4 + 4 }
+        /* stall */
+        { dword_align r6, r7, r1; slti_u r9, r2, 64 + 4 }
+EX:     { swadd r0, r6, 4; addi r2, r2, -4 }
+        { bnz r8, .Lcleanup_unaligned_words; andi r8, r0, 63 }
+        { bnzt r8, .Lcopy_unaligned_src_words; move r6, r7 }
+
+        /* On entry:
+         * - r0 is the next store address.
+         * - r1 points 4 bytes past the load address corresponding to r0.
+         * - r2 >= 4 (# of bytes left to store).
+         * - r6 is the next aligned src word value.
+         * - r9 = (r2 < 64U).
+         * - r18 points one byte past the end of source memory.
+         */
+.Ldest_is_L2_line_aligned:
+
+        {
+        /* Not a full cache line remains. */
+        bnz r9, .Lcleanup_unaligned_words
+        move r7, r6
+        }
+
+        /* r2 >= 64 */
+
+        /* Kick off two prefetches, but don't go past the end. */
+        { addi r3, r1, 63 - 4; addi r8, r1, 64 + 63 - 4 }
+        { prefetch r3; move r3, r8; slt_u r8, r8, r18 }
+        { mvz r3, r8, r1; addi r8, r3, 64 }
+        { prefetch r3; move r3, r8; slt_u r8, r8, r18 }
+        { mvz r3, r8, r1; movei r17, 0 }
+
+.Lcopy_unaligned_line:
+        /* Prefetch another line. */
+        { prefetch r3; addi r15, r1, 60; addi r3, r3, 64 }
+        /* Fire off a load of the last word we are about to copy. */
+EX:     { lw_na r15, r15; slt_u r8, r3, r18 }
+
+EX:     { mvz r3, r8, r1; wh64 r0 }
+
+        /* This loop runs twice.
+         *
+         * On entry:
+         * - r17 is even before the first iteration, and odd before
+         *   the second.  It is incremented inside the loop.  Encountering
+         *   an even value at the end of the loop makes it stop.
+         */
+.Lcopy_half_an_unaligned_line:
+EX:     {
+        /* Stall until the last byte is ready. In the steady state this
+         * guarantees all words to load below will be in the L2 cache, which
+         * avoids shunting the loads to the RTF.
+         */
+        move zero, r15
+        lwadd_na r7, r1, 16
+        }
+EX:     { lwadd_na r11, r1, 12 }
+EX:     { lwadd_na r14, r1, -24 }
+EX:     { lwadd_na r8, r1, 4 }
+EX:     { lwadd_na r9, r1, 4 }
+EX:     {
+        lwadd_na r10, r1, 8
+        /* r16 = (r2 < 64), after we subtract 32 from r2 below. */
+        slti_u r16, r2, 64 + 32
+        }
+EX:     { lwadd_na r12, r1, 4; addi r17, r17, 1 }
+EX:     { lwadd_na r13, r1, 8; dword_align r6, r7, r1 }
+EX:     { swadd r0, r6,  4; dword_align r7,  r8,  r1 }
+EX:     { swadd r0, r7,  4; dword_align r8,  r9,  r1 }
+EX:     { swadd r0, r8,  4; dword_align r9,  r10, r1 }
+EX:     { swadd r0, r9,  4; dword_align r10, r11, r1 }
+EX:     { swadd r0, r10, 4; dword_align r11, r12, r1 }
+EX:     { swadd r0, r11, 4; dword_align r12, r13, r1 }
+EX:     { swadd r0, r12, 4; dword_align r13, r14, r1 }
+EX:     { swadd r0, r13, 4; addi r2, r2, -32 }
+        { move r6, r14; bbst r17, .Lcopy_half_an_unaligned_line }
+
+        { bzt r16, .Lcopy_unaligned_line; move r7, r6 }
+
+        /* On entry:
+         * - r0 is the next store address.
+         * - r1 points 4 bytes past the load address corresponding to r0.
+         * - r2 >= 0 (# of bytes left to store).
+         * - r7 is the next aligned src word value.
+         */
+.Lcleanup_unaligned_words:
+        /* Handle any trailing bytes. */
+        { bz r2, .Lcopy_unaligned_done; slti_u r8, r2, 4 }
+        { bzt r8, .Lcopy_unaligned_src_words; move r6, r7 }
+
+        /* Move r1 back to the point where it corresponds to r0. */
+        { addi r1, r1, -4 }
+
+#else /* !CHIP_HAS_DWORD_ALIGN() */
+
+        /* Compute right/left shift counts and load initial source words. */
+        { andi r5, r1, -4; andi r3, r1, 3 }
+EX:     { lw r6, r5; addi r5, r5, 4; shli r3, r3, 3 }
+EX:     { lw r7, r5; addi r5, r5, 4; sub r4, zero, r3 }
+
+        /* Load and store one word at a time, using shifts and ORs
+         * to correct for the misaligned src.
+         */
+.Lcopy_unaligned_src_loop:
+        { shr r6, r6, r3; shl r8, r7, r4 }
+EX:     { lw r7, r5; or r8, r8, r6; move r6, r7 }
+EX:     { sw r0, r8; addi r0, r0, 4; addi r2, r2, -4 }
+        { addi r5, r5, 4; slti_u r8, r2, 8 }
+        { bzt r8, .Lcopy_unaligned_src_loop; addi r1, r1, 4 }
+
+        { bz r2, .Lcopy_unaligned_done }
+#endif /* !CHIP_HAS_DWORD_ALIGN() */
+
+        /* Fall through */
+
+/*
+ *
+ * 1 byte at a time copy handler.
+ *
+ */
+
+.Lcopy_unaligned_few:
+EX:     { lb_u r3, r1; addi r1, r1, 1 }
+EX:     { sb r0, r3;   addi r0, r0, 1; addi r2, r2, -1 }
+        { bnzt r2, .Lcopy_unaligned_few }
+
+.Lcopy_unaligned_done:
+
+        /* For memcpy return original dest address, else zero. */
+        { mz r0, r29, r23; jrp lr }
+
+.Lend_memcpy_common:
+        .size memcpy_common, .Lend_memcpy_common - memcpy_common
+
+        .section .fixup,"ax"
+memcpy_common_fixup:
+        .type memcpy_common_fixup, @function
+
+        /* Skip any bytes we already successfully copied.
+         * r2 (num remaining) is correct, but r0 (dst) and r1 (src)
+         * may not be quite right because of unrolling and prefetching.
+         * So we need to recompute their values as the address just
+         * after the last byte we are sure was successfully loaded and
+         * then stored.
+         */
+
+        /* Determine how many bytes we successfully copied. */
+        { sub r3, r25, r2 }
+
+        /* Add this to the original r0 and r1 to get their new values. */
+        { add r0, r23, r3; add r1, r24, r3 }
+
+        { bzt r29, memcpy_fixup_loop }
+        { blzt r29, copy_to_user_fixup_loop }
+
+copy_from_user_fixup_loop:
+        /* Try copying the rest one byte at a time, expecting a load fault. */
+.Lcfu:  { lb_u r3, r1; addi r1, r1, 1 }
+        { sb r0, r3; addi r0, r0, 1; addi r2, r2, -1 }
+        { bnzt r2, copy_from_user_fixup_loop }
+
+.Lcopy_from_user_fixup_zero_remainder:
+        { bbs r29, 2f }  /* low bit set means IS_COPY_FROM_USER */
+        /* byte-at-a-time loop faulted, so zero the rest. */
+        { move r3, r2; bz r2, 2f /* should be impossible, but handle it. */ }
+1:      { sb r0, zero; addi r0, r0, 1; addi r3, r3, -1 }
+        { bnzt r3, 1b }
+2:      move lr, r27
+        { move r0, r2; jrp lr }
+
+copy_to_user_fixup_loop:
+        /* Try copying the rest one byte at a time, expecting a store fault. */
+        { lb_u r3, r1; addi r1, r1, 1 }
+.Lctu:  { sb r0, r3; addi r0, r0, 1; addi r2, r2, -1 }
+        { bnzt r2, copy_to_user_fixup_loop }
+.Lcopy_to_user_fixup_done:
+        move lr, r27
+        { move r0, r2; jrp lr }
+
+memcpy_fixup_loop:
+        /* Try copying the rest one byte at a time. We expect a disastrous
+         * fault to happen since we are in fixup code, but let it happen.
+         */
+        { lb_u r3, r1; addi r1, r1, 1 }
+        { sb r0, r3; addi r0, r0, 1; addi r2, r2, -1 }
+        { bnzt r2, memcpy_fixup_loop }
+        /* This should be unreachable, we should have faulted again.
+         * But be paranoid and handle it in case some interrupt changed
+         * the TLB or something.
+         */
+        move lr, r27
+        { move r0, r23; jrp lr }
+
+        .size memcpy_common_fixup, . - memcpy_common_fixup
+
+        .section __ex_table,"a"
+        .word .Lcfu, .Lcopy_from_user_fixup_zero_remainder
+        .word .Lctu, .Lcopy_to_user_fixup_done
diff --git a/arch/tile/lib/memcpy_tile64.c b/arch/tile/lib/memcpy_tile64.c
new file mode 100644
index 000000000000..dfedea7b266b
--- /dev/null
+++ b/arch/tile/lib/memcpy_tile64.c
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/string.h>
+#include <linux/smp.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <asm/fixmap.h>
+#include <asm/kmap_types.h>
+#include <asm/tlbflush.h>
+#include <hv/hypervisor.h>
+#include <arch/chip.h>
+
+
+#if !CHIP_HAS_COHERENT_LOCAL_CACHE()
+
+/* Defined in memcpy.S */
+extern unsigned long __memcpy_asm(void *to, const void *from, unsigned long n);
+extern unsigned long __copy_to_user_inatomic_asm(
+        void __user *to, const void *from, unsigned long n);
+extern unsigned long __copy_from_user_inatomic_asm(
+        void *to, const void __user *from, unsigned long n);
+extern unsigned long __copy_from_user_zeroing_asm(
+        void *to, const void __user *from, unsigned long n);
+
+typedef unsigned long (*memcpy_t)(void *, const void *, unsigned long);
+
+/* Size above which to consider TLB games for performance */
+#define LARGE_COPY_CUTOFF 2048
+
+/* Communicate to the simulator what we are trying to do. */
+#define sim_allow_multiple_caching(b) \
+  __insn_mtspr(SPR_SIM_CONTROL, \
+   SIM_CONTROL_ALLOW_MULTIPLE_CACHING | ((b) << _SIM_CONTROL_OPERATOR_BITS))
+
+/*
+ * Copy memory by briefly enabling incoherent cacheline-at-a-time mode.
+ *
+ * We set up our own source and destination PTEs that we fully control.
+ * This is the only way to guarantee that we don't race with another
+ * thread that is modifying the PTE; we can't afford to try the
+ * copy_{to,from}_user() technique of catching the interrupt, since
+ * we must run with interrupts disabled to avoid the risk of some
+ * other code seeing the incoherent data in our cache.  (Recall that
+ * our cache is indexed by PA, so even if the other code doesn't use
+ * our KM_MEMCPY virtual addresses, they'll still hit in cache using
+ * the normal VAs that aren't supposed to hit in cache.)
+ */
+static void memcpy_multicache(void *dest, const void *source,
+                              pte_t dst_pte, pte_t src_pte, int len)
+{
+        int idx;
+        unsigned long flags, newsrc, newdst;
+        pmd_t *pmdp;
+        pte_t *ptep;
+        int cpu = get_cpu();
+
+        /*
+         * Disable interrupts so that we don't recurse into memcpy()
+         * in an interrupt handler, nor accidentally reference
+         * the PA of the source from an interrupt routine.  Also
+         * notify the simulator that we're playing games so we don't
+         * generate spurious coherency warnings.
+         */
+        local_irq_save(flags);
+        sim_allow_multiple_caching(1);
+
+        /* Set up the new dest mapping */
+        idx = FIX_KMAP_BEGIN + (KM_TYPE_NR * cpu) + KM_MEMCPY0;
+        newdst = __fix_to_virt(idx) + ((unsigned long)dest & (PAGE_SIZE-1));
+        pmdp = pmd_offset(pud_offset(pgd_offset_k(newdst), newdst), newdst);
+        ptep = pte_offset_kernel(pmdp, newdst);
+        if (pte_val(*ptep) != pte_val(dst_pte)) {
+                set_pte(ptep, dst_pte);
+                local_flush_tlb_page(NULL, newdst, PAGE_SIZE);
+        }
+
+        /* Set up the new source mapping */
+        idx += (KM_MEMCPY0 - KM_MEMCPY1);
+        src_pte = hv_pte_set_nc(src_pte);
+        src_pte = hv_pte_clear_writable(src_pte);  /* be paranoid */
+        newsrc = __fix_to_virt(idx) + ((unsigned long)source & (PAGE_SIZE-1));
+        pmdp = pmd_offset(pud_offset(pgd_offset_k(newsrc), newsrc), newsrc);
+        ptep = pte_offset_kernel(pmdp, newsrc);
+        *ptep = src_pte;   /* set_pte() would be confused by this */
+        local_flush_tlb_page(NULL, newsrc, PAGE_SIZE);
+
+        /* Actually move the data. */
+        __memcpy_asm((void *)newdst, (const void *)newsrc, len);
+
+        /*
+         * Remap the source as locally-cached and not OLOC'ed so that
+         * we can inval without also invaling the remote cpu's cache.
+         * This also avoids known errata with inv'ing cacheable oloc data.
+         */
+        src_pte = hv_pte_set_mode(src_pte, HV_PTE_MODE_CACHE_NO_L3);
+        src_pte = hv_pte_set_writable(src_pte); /* need write access for inv */
+        *ptep = src_pte;   /* set_pte() would be confused by this */
+        local_flush_tlb_page(NULL, newsrc, PAGE_SIZE);
+
+        /*
+         * Do the actual invalidation, covering the full L2 cache line
+         * at the end since __memcpy_asm() is somewhat aggressive.
+         */
+        __inv_buffer((void *)newsrc, len);
+
+        /*
+         * We're done: notify the simulator that all is back to normal,
+         * and re-enable interrupts and pre-emption.
+         */
+        sim_allow_multiple_caching(0);
+        local_irq_restore(flags);
+        put_cpu();
+}
+
+/*
+ * Identify large copies from remotely-cached memory, and copy them
+ * via memcpy_multicache() if they look good, otherwise fall back
+ * to the particular kind of copying passed as the memcpy_t function.
+ */
+static unsigned long fast_copy(void *dest, const void *source, int len,
+                               memcpy_t func)
+{
+        /*
+         * Check if it's big enough to bother with.  We may end up doing a
+         * small copy via TLB manipulation if we're near a page boundary,
+         * but presumably we'll make it up when we hit the second page.
+         */
+        while (len >= LARGE_COPY_CUTOFF) {
+                int copy_size, bytes_left_on_page;
+                pte_t *src_ptep, *dst_ptep;
+                pte_t src_pte, dst_pte;
+                struct page *src_page, *dst_page;
+
+                /* Is the source page oloc'ed to a remote cpu? */
+retry_source:
+                src_ptep = virt_to_pte(current->mm, (unsigned long)source);
+                if (src_ptep == NULL)
+                        break;
+                src_pte = *src_ptep;
+                if (!hv_pte_get_present(src_pte) ||
+                    !hv_pte_get_readable(src_pte) ||
+                    hv_pte_get_mode(src_pte) != HV_PTE_MODE_CACHE_TILE_L3)
+                        break;
+                if (get_remote_cache_cpu(src_pte) == smp_processor_id())
+                        break;
+                src_page = pfn_to_page(hv_pte_get_pfn(src_pte));
+                get_page(src_page);
+                if (pte_val(src_pte) != pte_val(*src_ptep)) {
+                        put_page(src_page);
+                        goto retry_source;
+                }
+                if (pte_huge(src_pte)) {
+                        /* Adjust the PTE to correspond to a small page */
+                        int pfn = hv_pte_get_pfn(src_pte);
+                        pfn += (((unsigned long)source & (HPAGE_SIZE-1))
+                                >> PAGE_SHIFT);
+                        src_pte = pfn_pte(pfn, src_pte);
+                        src_pte = pte_mksmall(src_pte);
+                }
+
+                /* Is the destination page writable? */
+retry_dest:
+                dst_ptep = virt_to_pte(current->mm, (unsigned long)dest);
+                if (dst_ptep == NULL) {
+                        put_page(src_page);
+                        break;
+                }
+                dst_pte = *dst_ptep;
+                if (!hv_pte_get_present(dst_pte) ||
+                    !hv_pte_get_writable(dst_pte)) {
+                        put_page(src_page);
+                        break;
+                }
+                dst_page = pfn_to_page(hv_pte_get_pfn(dst_pte));
+                if (dst_page == src_page) {
+                        /*
+                         * Source and dest are on the same page; this
+                         * potentially exposes us to incoherence if any
+                         * part of src and dest overlap on a cache line.
+                         * Just give up rather than trying to be precise.
+                         */
+                        put_page(src_page);
+                        break;
+                }
+                get_page(dst_page);
+                if (pte_val(dst_pte) != pte_val(*dst_ptep)) {
+                        put_page(dst_page);
+                        goto retry_dest;
+                }
+                if (pte_huge(dst_pte)) {
+                        /* Adjust the PTE to correspond to a small page */
+                        int pfn = hv_pte_get_pfn(dst_pte);
+                        pfn += (((unsigned long)dest & (HPAGE_SIZE-1))
+                                >> PAGE_SHIFT);
+                        dst_pte = pfn_pte(pfn, dst_pte);
+                        dst_pte = pte_mksmall(dst_pte);
+                }
+
+                /* All looks good: create a cachable PTE and copy from it */
+                copy_size = len;
+                bytes_left_on_page =
+                        PAGE_SIZE - (((int)source) & (PAGE_SIZE-1));
+                if (copy_size > bytes_left_on_page)
+                        copy_size = bytes_left_on_page;
+                bytes_left_on_page =
+                        PAGE_SIZE - (((int)dest) & (PAGE_SIZE-1));
+                if (copy_size > bytes_left_on_page)
+                        copy_size = bytes_left_on_page;
+                memcpy_multicache(dest, source, dst_pte, src_pte, copy_size);
+
+                /* Release the pages */
+                put_page(dst_page);
+                put_page(src_page);
+
+                /* Continue on the next page */
+                dest += copy_size;
+                source += copy_size;
+                len -= copy_size;
+        }
+
+        return func(dest, source, len);
+}
+
+void *memcpy(void *to, const void *from, __kernel_size_t n)
+{
+        if (n < LARGE_COPY_CUTOFF)
+                return (void *)__memcpy_asm(to, from, n);
+        else
+                return (void *)fast_copy(to, from, n, __memcpy_asm);
+}
+
+unsigned long __copy_to_user_inatomic(void __user *to, const void *from,
+                                      unsigned long n)
+{
+        if (n < LARGE_COPY_CUTOFF)
+                return __copy_to_user_inatomic_asm(to, from, n);
+        else
+                return fast_copy(to, from, n, __copy_to_user_inatomic_asm);
+}
+
+unsigned long __copy_from_user_inatomic(void *to, const void __user *from,
+                                        unsigned long n)
+{
+        if (n < LARGE_COPY_CUTOFF)
+                return __copy_from_user_inatomic_asm(to, from, n);
+        else
+                return fast_copy(to, from, n, __copy_from_user_inatomic_asm);
+}
+
+unsigned long __copy_from_user_zeroing(void *to, const void __user *from,
+                                       unsigned long n)
+{
+        if (n < LARGE_COPY_CUTOFF)
+                return __copy_from_user_zeroing_asm(to, from, n);
+        else
+                return fast_copy(to, from, n, __copy_from_user_zeroing_asm);
+}
+
+#endif /* !CHIP_HAS_COHERENT_LOCAL_CACHE() */
diff --git a/arch/tile/lib/memmove_32.c b/arch/tile/lib/memmove_32.c
new file mode 100644
index 000000000000..fd615ae6ade7
--- /dev/null
+++ b/arch/tile/lib/memmove_32.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+        if ((const char *)src >= (char *)dest + n
+            || (char *)dest >= (const char *)src + n) {
+                /* We found no overlap, so let memcpy do all the heavy
+                 * lifting (prefetching, etc.)
+                 */
+                return memcpy(dest, src, n);
+        }
+
+        if (n != 0) {
+                const uint8_t *in;
+                uint8_t x;
+                uint8_t *out;
+                int stride;
+
+                if (src < dest) {
+                        /* copy backwards */
+                        in = (const uint8_t *)src + n - 1;
+                        out = (uint8_t *)dest + n - 1;
+                        stride = -1;
+                } else {
+                        /* copy forwards */
+                        in = (const uint8_t *)src;
+                        out = (uint8_t *)dest;
+                        stride = 1;
+                }
+
+                /* Manually software-pipeline this loop. */
+                x = *in;
+                in += stride;
+
+                while (--n != 0) {
+                        *out = x;
+                        out += stride;
+                        x = *in;
+                        in += stride;
+                }
+
+                *out = x;
+        }
+
+        return dest;
+}
+EXPORT_SYMBOL(memmove);
diff --git a/arch/tile/lib/memset_32.c b/arch/tile/lib/memset_32.c
new file mode 100644
index 000000000000..d014c1fbcbc2
--- /dev/null
+++ b/arch/tile/lib/memset_32.c
@@ -0,0 +1,250 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <arch/chip.h>
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+
+void *memset(void *s, int c, size_t n)
+{
+        uint32_t *out32;
+        int n32;
+        uint32_t v16, v32;
+        uint8_t *out8 = s;
+#if !CHIP_HAS_WH64()
+        int ahead32;
+#else
+        int to_align32;
+#endif
+
+        /* Experimentation shows that a trivial tight loop is a win up until
+         * around a size of 20, where writing a word at a time starts to win.
+         */
+#define BYTE_CUTOFF 20
+
+#if BYTE_CUTOFF < 3
+        /* This must be at least at least this big, or some code later
+         * on doesn't work.
+         */
+#error "BYTE_CUTOFF is too small"
+#endif
+
+        if (n < BYTE_CUTOFF) {
+                /* Strangely, this turns out to be the tightest way to
+                 * write this loop.
+                 */
+                if (n != 0) {
+                        do {
+                                /* Strangely, combining these into one line
+                                 * performs worse.
+                                 */
+                                *out8 = c;
+                                out8++;
+                        } while (--n != 0);
+                }
+
+                return s;
+        }
+
+#if !CHIP_HAS_WH64()
+        /* Use a spare issue slot to start prefetching the first cache
+         * line early. This instruction is free as the store can be buried
+         * in otherwise idle issue slots doing ALU ops.
+         */
+        __insn_prefetch(out8);
+
+        /* We prefetch the end so that a short memset that spans two cache
+         * lines gets some prefetching benefit. Again we believe this is free
+         * to issue.
+         */
+        __insn_prefetch(&out8[n - 1]);
+#endif /* !CHIP_HAS_WH64() */
+
+
+        /* Align 'out8'. We know n >= 3 so this won't write past the end. */
+        while (((uintptr_t) out8 & 3) != 0) {
+                *out8++ = c;
+                --n;
+        }
+
+        /* Align 'n'. */
+        while (n & 3)
+                out8[--n] = c;
+
+        out32 = (uint32_t *) out8;
+        n32 = n >> 2;
+
+        /* Tile input byte out to 32 bits. */
+        v16 = __insn_intlb(c, c);
+        v32 = __insn_intlh(v16, v16);
+
+        /* This must be at least 8 or the following loop doesn't work. */
+#define CACHE_LINE_SIZE_IN_WORDS (CHIP_L2_LINE_SIZE() / 4)
+
+#if !CHIP_HAS_WH64()
+
+        ahead32 = CACHE_LINE_SIZE_IN_WORDS;
+
+        /* We already prefetched the first and last cache lines, so
+         * we only need to do more prefetching if we are storing
+         * to more than two cache lines.
+         */
+        if (n32 > CACHE_LINE_SIZE_IN_WORDS * 2) {
+                int i;
+
+                /* Prefetch the next several cache lines.
+                 * This is the setup code for the software-pipelined
+                 * loop below.
+                 */
+#define MAX_PREFETCH 5
+                ahead32 = n32 & -CACHE_LINE_SIZE_IN_WORDS;
+                if (ahead32 > MAX_PREFETCH * CACHE_LINE_SIZE_IN_WORDS)
+                        ahead32 = MAX_PREFETCH * CACHE_LINE_SIZE_IN_WORDS;
+
+                for (i = CACHE_LINE_SIZE_IN_WORDS;
+                     i < ahead32; i += CACHE_LINE_SIZE_IN_WORDS)
+                        __insn_prefetch(&out32[i]);
+        }
+
+        if (n32 > ahead32) {
+                while (1) {
+                        int j;
+
+                        /* Prefetch by reading one word several cache lines
+                         * ahead.  Since loads are non-blocking this will
+                         * cause the full cache line to be read while we are
+                         * finishing earlier cache lines.  Using a store
+                         * here causes microarchitectural performance
+                         * problems where a victimizing store miss goes to
+                         * the head of the retry FIFO and locks the pipe for
+                         * a few cycles.  So a few subsequent stores in this
+                         * loop go into the retry FIFO, and then later
+                         * stores see other stores to the same cache line
+                         * are already in the retry FIFO and themselves go
+                         * into the retry FIFO, filling it up and grinding
+                         * to a halt waiting for the original miss to be
+                         * satisfied.
+                         */
+                        __insn_prefetch(&out32[ahead32]);
+
+#if CACHE_LINE_SIZE_IN_WORDS % 4 != 0
+#error "Unhandled CACHE_LINE_SIZE_IN_WORDS"
+#endif
+
+                        n32 -= CACHE_LINE_SIZE_IN_WORDS;
+
+                        /* Save icache space by only partially unrolling
+                         * this loop.
+                         */
+                        for (j = CACHE_LINE_SIZE_IN_WORDS / 4; j > 0; j--) {
+                                *out32++ = v32;
+                                *out32++ = v32;
+                                *out32++ = v32;
+                                *out32++ = v32;
+                        }
+
+                        /* To save compiled code size, reuse this loop even
+                         * when we run out of prefetching to do by dropping
+                         * ahead32 down.
+                         */
+                        if (n32 <= ahead32) {
+                                /* Not even a full cache line left,
+                                 * so stop now.
+                                 */
+                                if (n32 < CACHE_LINE_SIZE_IN_WORDS)
+                                        break;
+
+                                /* Choose a small enough value that we don't
+                                 * prefetch past the end.  There's no sense
+                                 * in touching cache lines we don't have to.
+                                 */
+                                ahead32 = CACHE_LINE_SIZE_IN_WORDS - 1;
+                        }
+                }
+        }
+
+#else /* CHIP_HAS_WH64() */
+
+        /* Determine how many words we need to emit before the 'out32'
+         * pointer becomes aligned modulo the cache line size.
+         */
+        to_align32 =
+                (-((uintptr_t)out32 >> 2)) & (CACHE_LINE_SIZE_IN_WORDS - 1);
+
+        /* Only bother aligning and using wh64 if there is at least
+         * one full cache line to process.  This check also prevents
+         * overrunning the end of the buffer with alignment words.
+         */
+        if (to_align32 <= n32 - CACHE_LINE_SIZE_IN_WORDS) {
+                int lines_left;
+
+                /* Align out32 mod the cache line size so we can use wh64. */
+                n32 -= to_align32;
+                for (; to_align32 != 0; to_align32--) {
+                        *out32 = v32;
+                        out32++;
+                }
+
+                /* Use unsigned divide to turn this into a right shift. */
+                lines_left = (unsigned)n32 / CACHE_LINE_SIZE_IN_WORDS;
+
+                do {
+                        /* Only wh64 a few lines at a time, so we don't
+                         * exceed the maximum number of victim lines.
+                         */
+                        int x = ((lines_left < CHIP_MAX_OUTSTANDING_VICTIMS())
+                                  ? lines_left
+                                  : CHIP_MAX_OUTSTANDING_VICTIMS());
+                        uint32_t *wh = out32;
+                        int i = x;
+                        int j;
+
+                        lines_left -= x;
+
+                        do {
+                                __insn_wh64(wh);
+                                wh += CACHE_LINE_SIZE_IN_WORDS;
+                        } while (--i);
+
+                        for (j = x * (CACHE_LINE_SIZE_IN_WORDS / 4);
+                             j != 0; j--) {
+                                *out32++ = v32;
+                                *out32++ = v32;
+                                *out32++ = v32;
+                                *out32++ = v32;
+                        }
+                } while (lines_left != 0);
+
+                /* We processed all full lines above, so only this many
+                 * words remain to be processed.
+                 */
+                n32 &= CACHE_LINE_SIZE_IN_WORDS - 1;
+        }
+
+#endif /* CHIP_HAS_WH64() */
+
+        /* Now handle any leftover values. */
+        if (n32 != 0) {
+                do {
+                        *out32 = v32;
+                        out32++;
+                } while (--n32 != 0);
+        }
+
+        return s;
+}
+EXPORT_SYMBOL(memset);
diff --git a/arch/tile/lib/spinlock_32.c b/arch/tile/lib/spinlock_32.c
new file mode 100644
index 000000000000..485e24d62c6b
--- /dev/null
+++ b/arch/tile/lib/spinlock_32.c
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <asm/processor.h>
+
+#include "spinlock_common.h"
+
+void arch_spin_lock(arch_spinlock_t *lock)
+{
+        int my_ticket;
+        int iterations = 0;
+        int delta;
+
+        while ((my_ticket = __insn_tns((void *)&lock->next_ticket)) & 1)
+                delay_backoff(iterations++);
+
+        /* Increment the next ticket number, implicitly releasing tns lock. */
+        lock->next_ticket = my_ticket + TICKET_QUANTUM;
+
+        /* Wait until it's our turn. */
+        while ((delta = my_ticket - lock->current_ticket) != 0)
+                relax((128 / CYCLES_PER_RELAX_LOOP) * delta);
+}
+EXPORT_SYMBOL(arch_spin_lock);
+
+int arch_spin_trylock(arch_spinlock_t *lock)
+{
+        /*
+         * Grab a ticket; no need to retry if it's busy, we'll just
+         * treat that the same as "locked", since someone else
+         * will lock it momentarily anyway.
+         */
+        int my_ticket = __insn_tns((void *)&lock->next_ticket);
+
+        if (my_ticket == lock->current_ticket) {
+                /* Not currently locked, so lock it by keeping this ticket. */
+                lock->next_ticket = my_ticket + TICKET_QUANTUM;
+                /* Success! */
+                return 1;
+        }
+
+        if (!(my_ticket & 1)) {
+                /* Release next_ticket. */
+                lock->next_ticket = my_ticket;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(arch_spin_trylock);
+
+void arch_spin_unlock_wait(arch_spinlock_t *lock)
+{
+        u32 iterations = 0;
+        while (arch_spin_is_locked(lock))
+                delay_backoff(iterations++);
+}
+EXPORT_SYMBOL(arch_spin_unlock_wait);
+
+/*
+ * The low byte is always reserved to be the marker for a "tns" operation
+ * since the low bit is set to "1" by a tns.  The next seven bits are
+ * zeroes.  The next byte holds the "next" writer value, i.e. the ticket
+ * available for the next task that wants to write.  The third byte holds
+ * the current writer value, i.e. the writer who holds the current ticket.
+ * If current == next == 0, there are no interested writers.
+ */
+#define WR_NEXT_SHIFT   _WR_NEXT_SHIFT
+#define WR_CURR_SHIFT   _WR_CURR_SHIFT
+#define WR_WIDTH        _WR_WIDTH
+#define WR_MASK         ((1 << WR_WIDTH) - 1)
+
+/*
+ * The last eight bits hold the active reader count.  This has to be
+ * zero before a writer can start to write.
+ */
+#define RD_COUNT_SHIFT  _RD_COUNT_SHIFT
+#define RD_COUNT_WIDTH  _RD_COUNT_WIDTH
+#define RD_COUNT_MASK   ((1 << RD_COUNT_WIDTH) - 1)
+
+
+/* Lock the word, spinning until there are no tns-ers. */
+static inline u32 get_rwlock(arch_rwlock_t *rwlock)
+{
+        u32 iterations = 0;
+        for (;;) {
+                u32 val = __insn_tns((int *)&rwlock->lock);
+                if (unlikely(val & 1)) {
+                        delay_backoff(iterations++);
+                        continue;
+                }
+                return val;
+        }
+}
+
+int arch_read_trylock_slow(arch_rwlock_t *rwlock)
+{
+        u32 val = get_rwlock(rwlock);
+        int locked = (val << RD_COUNT_WIDTH) == 0;
+        rwlock->lock = val + (locked << RD_COUNT_SHIFT);
+        return locked;
+}
+EXPORT_SYMBOL(arch_read_trylock_slow);
+
+void arch_read_unlock_slow(arch_rwlock_t *rwlock)
+{
+        u32 val = get_rwlock(rwlock);
+        rwlock->lock = val - (1 << RD_COUNT_SHIFT);
+}
+EXPORT_SYMBOL(arch_read_unlock_slow);
+
+void arch_write_unlock_slow(arch_rwlock_t *rwlock, u32 val)
+{
+        u32 eq, mask = 1 << WR_CURR_SHIFT;
+        while (unlikely(val & 1)) {
+                /* Limited backoff since we are the highest-priority task. */
+                relax(4);
+                val = __insn_tns((int *)&rwlock->lock);
+        }
+        val = __insn_addb(val, mask);
+        eq = __insn_seqb(val, val << (WR_CURR_SHIFT - WR_NEXT_SHIFT));
+        val = __insn_mz(eq & mask, val);
+        rwlock->lock = val;
+}
+EXPORT_SYMBOL(arch_write_unlock_slow);
+
+/*
+ * We spin until everything but the reader bits (which are in the high
+ * part of the word) are zero, i.e. no active or waiting writers, no tns.
+ *
+ * ISSUE: This approach can permanently starve readers.  A reader who sees
+ * a writer could instead take a ticket lock (just like a writer would),
+ * and atomically enter read mode (with 1 reader) when it gets the ticket.
+ * This way both readers and writers will always make forward progress
+ * in a finite time.
+ */
+void arch_read_lock_slow(arch_rwlock_t *rwlock, u32 val)
+{
+        u32 iterations = 0;
+        do {
+                if (!(val & 1))
+                        rwlock->lock = val;
+                delay_backoff(iterations++);
+                val = __insn_tns((int *)&rwlock->lock);
+        } while ((val << RD_COUNT_WIDTH) != 0);
+        rwlock->lock = val + (1 << RD_COUNT_SHIFT);
+}
+EXPORT_SYMBOL(arch_read_lock_slow);
+
+void arch_write_lock_slow(arch_rwlock_t *rwlock, u32 val)
+{
+        /*
+         * The trailing underscore on this variable (and curr_ below)
+         * reminds us that the high bits are garbage; we mask them out
+         * when we compare them.
+         */
+        u32 my_ticket_;
+
+        /* Take out the next ticket; this will also stop would-be readers. */
+        if (val & 1)
+                val = get_rwlock(rwlock);
+        rwlock->lock = __insn_addb(val, 1 << WR_NEXT_SHIFT);
+
+        /* Extract my ticket value from the original word. */
+        my_ticket_ = val >> WR_NEXT_SHIFT;
+
+        /*
+         * Wait until the "current" field matches our ticket, and
+         * there are no remaining readers.
+         */
+        for (;;) {
+                u32 curr_ = val >> WR_CURR_SHIFT;
+                u32 readers = val >> RD_COUNT_SHIFT;
+                u32 delta = ((my_ticket_ - curr_) & WR_MASK) + !!readers;
+                if (likely(delta == 0))
+                        break;
+
+                /* Delay based on how many lock-holders are still out there. */
+                relax((256 / CYCLES_PER_RELAX_LOOP) * delta);
+
+                /*
+                 * Get a non-tns value to check; we don't need to tns
+                 * it ourselves.  Since we're not tns'ing, we retry
+                 * more rapidly to get a valid value.
+                 */
+                while ((val = rwlock->lock) & 1)
+                        relax(4);
+        }
+}
+EXPORT_SYMBOL(arch_write_lock_slow);
+
+int __tns_atomic_acquire(atomic_t *lock)
+{
+        int ret;
+        u32 iterations = 0;
+
+        BUG_ON(__insn_mfspr(SPR_INTERRUPT_CRITICAL_SECTION));
+        __insn_mtspr(SPR_INTERRUPT_CRITICAL_SECTION, 1);
+
+        while ((ret = __insn_tns((void *)&lock->counter)) == 1)
+                delay_backoff(iterations++);
+        return ret;
+}
+
+void __tns_atomic_release(atomic_t *p, int v)
+{
+        p->counter = v;
+        __insn_mtspr(SPR_INTERRUPT_CRITICAL_SECTION, 0);
+}
diff --git a/arch/tile/lib/spinlock_common.h b/arch/tile/lib/spinlock_common.h
new file mode 100644
index 000000000000..c10109809132
--- /dev/null
+++ b/arch/tile/lib/spinlock_common.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ * This file is included into spinlock_32.c or _64.c.
+ */
+
+/*
+ * The mfspr in __spinlock_relax() is 5 or 6 cycles plus 2 for loop
+ * overhead.
+ */
+#ifdef __tilegx__
+#define CYCLES_PER_RELAX_LOOP 7
+#else
+#define CYCLES_PER_RELAX_LOOP 8
+#endif
+
+/*
+ * Idle the core for CYCLES_PER_RELAX_LOOP * iterations cycles.
+ */
+static inline void
+relax(int iterations)
+{
+        for (/*above*/; iterations > 0; iterations--)
+                __insn_mfspr(SPR_PASS);
+        barrier();
+}
+
+/* Perform bounded exponential backoff.*/
+static void delay_backoff(int iterations)
+{
+        u32 exponent, loops;
+
+        /*
+         * 2^exponent is how many times we go around the loop,
+         * which takes 8 cycles.  We want to start with a 16- to 31-cycle
+         * loop, so we need to go around minimum 2 = 2^1 times, so we
+         * bias the original value up by 1.
+         */
+        exponent = iterations + 1;
+
+        /*
+         * Don't allow exponent to exceed 7, so we have 128 loops,
+         * or 1,024 (to 2,047) cycles, as our maximum.
+         */
+        if (exponent > 8)
+                exponent = 8;
+
+        loops = 1 << exponent;
+
+        /* Add a randomness factor so two cpus never get in lock step. */
+        loops += __insn_crc32_32(stack_pointer, get_cycles_low()) &
+                (loops - 1);
+
+        relax(1 << exponent);
+}
diff --git a/arch/tile/lib/strchr_32.c b/arch/tile/lib/strchr_32.c
new file mode 100644
index 000000000000..c94e6f7ae7b5
--- /dev/null
+++ b/arch/tile/lib/strchr_32.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+#undef strchr
+
+char *strchr(const char *s, int c)
+{
+        int z, g;
+
+        /* Get an aligned pointer. */
+        const uintptr_t s_int = (uintptr_t) s;
+        const uint32_t *p = (const uint32_t *)(s_int & -4);
+
+        /* Create four copies of the byte for which we are looking. */
+        const uint32_t goal = 0x01010101 * (uint8_t) c;
+
+        /* Read the first aligned word, but force bytes before the string to
+         * match neither zero nor goal (we make sure the high bit of each
+         * byte is 1, and the low 7 bits are all the opposite of the goal
+         * byte).
+         *
+         * Note that this shift count expression works because we know shift
+         * counts are taken mod 32.
+         */
+        const uint32_t before_mask = (1 << (s_int << 3)) - 1;
+        uint32_t v = (*p | before_mask) ^ (goal & __insn_shrib(before_mask, 1));
+
+        uint32_t zero_matches, goal_matches;
+        while (1) {
+                /* Look for a terminating '\0'. */
+                zero_matches = __insn_seqb(v, 0);
+
+                /* Look for the goal byte. */
+                goal_matches = __insn_seqb(v, goal);
+
+                if (__builtin_expect(zero_matches | goal_matches, 0))
+                        break;
+
+                v = *++p;
+        }
+
+        z = __insn_ctz(zero_matches);
+        g = __insn_ctz(goal_matches);
+
+        /* If we found c before '\0' we got a match. Note that if c == '\0'
+         * then g == z, and we correctly return the address of the '\0'
+         * rather than NULL.
+         */
+        return (g <= z) ? ((char *)p) + (g >> 3) : NULL;
+}
+EXPORT_SYMBOL(strchr);
diff --git a/arch/tile/lib/strlen_32.c b/arch/tile/lib/strlen_32.c
new file mode 100644
index 000000000000..f26f88e11e4a
--- /dev/null
+++ b/arch/tile/lib/strlen_32.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+size_t strlen(const char *s)
+{
+        /* Get an aligned pointer. */
+        const uintptr_t s_int = (uintptr_t) s;
+        const uint32_t *p = (const uint32_t *)(s_int & -4);
+
+        /* Read the first word, but force bytes before the string to be nonzero.
+         * This expression works because we know shift counts are taken mod 32.
+         */
+        uint32_t v = *p | ((1 << (s_int << 3)) - 1);
+
+        uint32_t bits;
+        while ((bits = __insn_seqb(v, 0)) == 0)
+                v = *++p;
+
+        return ((const char *)p) + (__insn_ctz(bits) >> 3) - s;
+}
+EXPORT_SYMBOL(strlen);
diff --git a/arch/tile/lib/uaccess.c b/arch/tile/lib/uaccess.c
new file mode 100644
index 000000000000..f8d398c9ee7f
--- /dev/null
+++ b/arch/tile/lib/uaccess.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+int __range_ok(unsigned long addr, unsigned long size)
+{
+        unsigned long limit = current_thread_info()->addr_limit.seg;
+        return !((addr < limit && size <= limit - addr) ||
+                 is_arch_mappable_range(addr, size));
+}
+EXPORT_SYMBOL(__range_ok);
+
+#ifdef CONFIG_DEBUG_COPY_FROM_USER
+void copy_from_user_overflow(void)
+{
+       WARN(1, "Buffer overflow detected!\n");
+}
+EXPORT_SYMBOL(copy_from_user_overflow);
+#endif
diff --git a/arch/tile/lib/usercopy_32.S b/arch/tile/lib/usercopy_32.S
new file mode 100644
index 000000000000..979f76d83746
--- /dev/null
+++ b/arch/tile/lib/usercopy_32.S
@@ -0,0 +1,223 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/linkage.h>
+#include <asm/errno.h>
+#include <asm/cache.h>
+#include <arch/chip.h>
+
+/* Access user memory, but use MMU to avoid propagating kernel exceptions. */
+
+        .pushsection .fixup,"ax"
+
+get_user_fault:
+        { move r0, zero; move r1, zero }
+        { movei r2, -EFAULT; jrp lr }
+        ENDPROC(get_user_fault)
+
+put_user_fault:
+        { movei r0, -EFAULT; jrp lr }
+        ENDPROC(put_user_fault)
+
+        .popsection
+
+/*
+ * __get_user_N functions take a pointer in r0, and return 0 in r2
+ * on success, with the value in r0; or else -EFAULT in r2.
+ */
+#define __get_user_N(bytes, LOAD) \
+        STD_ENTRY(__get_user_##bytes); \
+1:      { LOAD r0, r0; move r1, zero; move r2, zero }; \
+        jrp lr; \
+        STD_ENDPROC(__get_user_##bytes); \
+        .pushsection __ex_table,"a"; \
+        .word 1b, get_user_fault; \
+        .popsection
+
+__get_user_N(1, lb_u)
+__get_user_N(2, lh_u)
+__get_user_N(4, lw)
+
+/*
+ * __get_user_8 takes a pointer in r0, and returns 0 in r2
+ * on success, with the value in r0/r1; or else -EFAULT in r2.
+ */
+        STD_ENTRY(__get_user_8);
+1:      { lw r0, r0; addi r1, r0, 4 };
+2:      { lw r1, r1; move r2, zero };
+        jrp lr;
+        STD_ENDPROC(__get_user_8);
+        .pushsection __ex_table,"a";
+        .word 1b, get_user_fault;
+        .word 2b, get_user_fault;
+        .popsection
+
+/*
+ * __put_user_N functions take a value in r0 and a pointer in r1,
+ * and return 0 in r0 on success or -EFAULT on failure.
+ */
+#define __put_user_N(bytes, STORE) \
+        STD_ENTRY(__put_user_##bytes); \
+1:      { STORE r1, r0; move r0, zero }; \
+        jrp lr; \
+        STD_ENDPROC(__put_user_##bytes); \
+        .pushsection __ex_table,"a"; \
+        .word 1b, put_user_fault; \
+        .popsection
+
+__put_user_N(1, sb)
+__put_user_N(2, sh)
+__put_user_N(4, sw)
+
+/*
+ * __put_user_8 takes a value in r0/r1 and a pointer in r2,
+ * and returns 0 in r0 on success or -EFAULT on failure.
+ */
+STD_ENTRY(__put_user_8)
+1:      { sw r2, r0; addi r2, r2, 4 }
+2:      { sw r2, r1; move r0, zero }
+        jrp lr
+        STD_ENDPROC(__put_user_8)
+        .pushsection __ex_table,"a"
+        .word 1b, put_user_fault
+        .word 2b, put_user_fault
+        .popsection
+
+
+/*
+ * strnlen_user_asm takes the pointer in r0, and the length bound in r1.
+ * It returns the length, including the terminating NUL, or zero on exception.
+ * If length is greater than the bound, returns one plus the bound.
+ */
+STD_ENTRY(strnlen_user_asm)
+        { bz r1, 2f; addi r3, r0, -1 }  /* bias down to include NUL */
+1:      { lb_u r4, r0; addi r1, r1, -1 }
+        bz r4, 2f
+        { bnzt r1, 1b; addi r0, r0, 1 }
+2:      { sub r0, r0, r3; jrp lr }
+        STD_ENDPROC(strnlen_user_asm)
+        .pushsection .fixup,"ax"
+strnlen_user_fault:
+        { move r0, zero; jrp lr }
+        ENDPROC(strnlen_user_fault)
+        .section __ex_table,"a"
+        .word 1b, strnlen_user_fault
+        .popsection
+
+/*
+ * strncpy_from_user_asm takes the kernel target pointer in r0,
+ * the userspace source pointer in r1, and the length bound (including
+ * the trailing NUL) in r2.  On success, it returns the string length
+ * (not including the trailing NUL), or -EFAULT on failure.
+ */
+STD_ENTRY(strncpy_from_user_asm)
+        { bz r2, 2f; move r3, r0 }
+1:      { lb_u r4, r1; addi r1, r1, 1; addi r2, r2, -1 }
+        { sb r0, r4; addi r0, r0, 1 }
+        bz r2, 2f
+        bnzt r4, 1b
+        addi r0, r0, -1   /* don't count the trailing NUL */
+2:      { sub r0, r0, r3; jrp lr }
+        STD_ENDPROC(strncpy_from_user_asm)
+        .pushsection .fixup,"ax"
+strncpy_from_user_fault:
+        { movei r0, -EFAULT; jrp lr }
+        ENDPROC(strncpy_from_user_fault)
+        .section __ex_table,"a"
+        .word 1b, strncpy_from_user_fault
+        .popsection
+
+/*
+ * clear_user_asm takes the user target address in r0 and the
+ * number of bytes to zero in r1.
+ * It returns the number of uncopiable bytes (hopefully zero) in r0.
+ * Note that we don't use a separate .fixup section here since we fall
+ * through into the "fixup" code as the last straight-line bundle anyway.
+ */
+STD_ENTRY(clear_user_asm)
+        { bz r1, 2f; or r2, r0, r1 }
+        andi r2, r2, 3
+        bzt r2, .Lclear_aligned_user_asm
+1:      { sb r0, zero; addi r0, r0, 1; addi r1, r1, -1 }
+        bnzt r1, 1b
+2:      { move r0, r1; jrp lr }
+        .pushsection __ex_table,"a"
+        .word 1b, 2b
+        .popsection
+
+.Lclear_aligned_user_asm:
+1:      { sw r0, zero; addi r0, r0, 4; addi r1, r1, -4 }
+        bnzt r1, 1b
+2:      { move r0, r1; jrp lr }
+        STD_ENDPROC(clear_user_asm)
+        .pushsection __ex_table,"a"
+        .word 1b, 2b
+        .popsection
+
+/*
+ * flush_user_asm takes the user target address in r0 and the
+ * number of bytes to flush in r1.
+ * It returns the number of unflushable bytes (hopefully zero) in r0.
+ */
+STD_ENTRY(flush_user_asm)
+        bz r1, 2f
+        { movei r2, L2_CACHE_BYTES; add r1, r0, r1 }
+        { sub r2, zero, r2; addi r1, r1, L2_CACHE_BYTES-1 }
+        { and r0, r0, r2; and r1, r1, r2 }
+        { sub r1, r1, r0 }
+1:      { flush r0; addi r1, r1, -CHIP_FLUSH_STRIDE() }
+        { addi r0, r0, CHIP_FLUSH_STRIDE(); bnzt r1, 1b }
+2:      { move r0, r1; jrp lr }
+        STD_ENDPROC(flush_user_asm)
+        .pushsection __ex_table,"a"
+        .word 1b, 2b
+        .popsection
+
+/*
+ * inv_user_asm takes the user target address in r0 and the
+ * number of bytes to invalidate in r1.
+ * It returns the number of not inv'able bytes (hopefully zero) in r0.
+ */
+STD_ENTRY(inv_user_asm)
+        bz r1, 2f
+        { movei r2, L2_CACHE_BYTES; add r1, r0, r1 }
+        { sub r2, zero, r2; addi r1, r1, L2_CACHE_BYTES-1 }
+        { and r0, r0, r2; and r1, r1, r2 }
+        { sub r1, r1, r0 }
+1:      { inv r0; addi r1, r1, -CHIP_INV_STRIDE() }
+        { addi r0, r0, CHIP_INV_STRIDE(); bnzt r1, 1b }
+2:      { move r0, r1; jrp lr }
+        STD_ENDPROC(inv_user_asm)
+        .pushsection __ex_table,"a"
+        .word 1b, 2b
+        .popsection
+
+/*
+ * finv_user_asm takes the user target address in r0 and the
+ * number of bytes to flush-invalidate in r1.
+ * It returns the number of not finv'able bytes (hopefully zero) in r0.
+ */
+STD_ENTRY(finv_user_asm)
+        bz r1, 2f
+        { movei r2, L2_CACHE_BYTES; add r1, r0, r1 }
+        { sub r2, zero, r2; addi r1, r1, L2_CACHE_BYTES-1 }
+        { and r0, r0, r2; and r1, r1, r2 }
+        { sub r1, r1, r0 }
+1:      { finv r0; addi r1, r1, -CHIP_FINV_STRIDE() }
+        { addi r0, r0, CHIP_FINV_STRIDE(); bnzt r1, 1b }
+2:      { move r0, r1; jrp lr }
+        STD_ENDPROC(finv_user_asm)
+        .pushsection __ex_table,"a"
+        .word 1b, 2b
+        .popsection
diff --git a/arch/tile/mm/Makefile b/arch/tile/mm/Makefile
new file mode 100644
index 000000000000..e252aeddc17d
--- /dev/null
+++ b/arch/tile/mm/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the linux tile-specific parts of the memory manager.
+#
+
+obj-y   := init.o pgtable.o fault.o extable.o elf.o \
+           mmap.o homecache.o migrate_$(BITS).o
+
+obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+obj-$(CONFIG_HIGHMEM) += highmem.o
diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c
new file mode 100644
index 000000000000..55e58e93bfc5
--- /dev/null
+++ b/arch/tile/mm/elf.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+#include <linux/mman.h>
+#include <linux/elf.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/sections.h>
+
+/* Notify a running simulator, if any, that an exec just occurred. */
+static void sim_notify_exec(const char *binary_name)
+{
+        unsigned char c;
+        do {
+                c = *binary_name++;
+                __insn_mtspr(SPR_SIM_CONTROL,
+                             (SIM_CONTROL_OS_EXEC
+                              | (c << _SIM_CONTROL_OPERATOR_BITS)));
+
+        } while (c);
+}
+
+static int notify_exec(void)
+{
+        int retval = 0;  /* failure */
+        struct vm_area_struct *vma = current->mm->mmap;
+        while (vma) {
+                if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
+                        break;
+                vma = vma->vm_next;
+        }
+        if (vma) {
+                char *buf = (char *) __get_free_page(GFP_KERNEL);
+                if (buf) {
+                        char *path = d_path(&vma->vm_file->f_path,
+                                            buf, PAGE_SIZE);
+                        if (!IS_ERR(path)) {
+                                sim_notify_exec(path);
+                                retval = 1;
+                        }
+                        free_page((unsigned long)buf);
+                }
+        }
+        return retval;
+}
+
+/* Notify a running simulator, if any, that we loaded an interpreter. */
+static void sim_notify_interp(unsigned long load_addr)
+{
+        size_t i;
+        for (i = 0; i < sizeof(load_addr); i++) {
+                unsigned char c = load_addr >> (i * 8);
+                __insn_mtspr(SPR_SIM_CONTROL,
+                             (SIM_CONTROL_OS_INTERP
+                              | (c << _SIM_CONTROL_OPERATOR_BITS)));
+        }
+}
+
+
+/* Kernel address of page used to map read-only kernel data into userspace. */
+static void *vdso_page;
+
+/* One-entry array used for install_special_mapping. */
+static struct page *vdso_pages[1];
+
+static int __init vdso_setup(void)
+{
+        vdso_page = (void *)get_zeroed_page(GFP_ATOMIC);
+        memcpy(vdso_page, __rt_sigreturn, __rt_sigreturn_end - __rt_sigreturn);
+        vdso_pages[0] = virt_to_page(vdso_page);
+        return 0;
+}
+device_initcall(vdso_setup);
+
+const char *arch_vma_name(struct vm_area_struct *vma)
+{
+        if (vma->vm_private_data == vdso_pages)
+                return "[vdso]";
+#ifndef __tilegx__
+        if (vma->vm_start == MEM_USER_INTRPT)
+                return "[intrpt]";
+#endif
+        return NULL;
+}
+
+int arch_setup_additional_pages(struct linux_binprm *bprm,
+                                int executable_stack)
+{
+        struct mm_struct *mm = current->mm;
+        unsigned long vdso_base;
+        int retval = 0;
+
+        /*
+         * Notify the simulator that an exec just occurred.
+         * If we can't find the filename of the mapping, just use
+         * whatever was passed as the linux_binprm filename.
+         */
+        if (!notify_exec())
+                sim_notify_exec(bprm->filename);
+
+        down_write(&mm->mmap_sem);
+
+        /*
+         * MAYWRITE to allow gdb to COW and set breakpoints
+         *
+         * Make sure the vDSO gets into every core dump.  Dumping its
+         * contents makes post-mortem fully interpretable later
+         * without matching up the same kernel and hardware config to
+         * see what PC values meant.
+         */
+        vdso_base = VDSO_BASE;
+        retval = install_special_mapping(mm, vdso_base, PAGE_SIZE,
+                                         VM_READ|VM_EXEC|
+                                         VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
+                                         VM_ALWAYSDUMP,
+                                         vdso_pages);
+
+#ifndef __tilegx__
+        /*
+         * Set up a user-interrupt mapping here; the user can't
+         * create one themselves since it is above TASK_SIZE.
+         * We make it unwritable by default, so the model for adding
+         * interrupt vectors always involves an mprotect.
+         */
+        if (!retval) {
+                unsigned long addr = MEM_USER_INTRPT;
+                addr = mmap_region(NULL, addr, INTRPT_SIZE,
+                                   MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE,
+                                   VM_READ|VM_EXEC|
+                                   VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, 0);
+                if (addr > (unsigned long) -PAGE_SIZE)
+                        retval = (int) addr;
+        }
+#endif
+
+        up_write(&mm->mmap_sem);
+
+        return retval;
+}
+
+
+void elf_plat_init(struct pt_regs *regs, unsigned long load_addr)
+{
+        /* Zero all registers. */
+        memset(regs, 0, sizeof(*regs));
+
+        /* Report the interpreter's load address. */
+        sim_notify_interp(load_addr);
+}
diff --git a/arch/tile/mm/extable.c b/arch/tile/mm/extable.c
new file mode 100644
index 000000000000..4fb0acb9d154
--- /dev/null
+++ b/arch/tile/mm/extable.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+
+int fixup_exception(struct pt_regs *regs)
+{
+        const struct exception_table_entry *fixup;
+
+        fixup = search_exception_tables(regs->pc);
+        if (fixup) {
+                regs->pc = fixup->fixup;
+                return 1;
+        }
+
+        return 0;
+}
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
new file mode 100644
index 000000000000..704f3e8a4385
--- /dev/null
+++ b/arch/tile/mm/fault.c
@@ -0,0 +1,875 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * From i386 code copyright (C) 1995  Linus Torvalds
+ */
+
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/vt_kern.h>              /* For unblank_screen() */
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <linux/kprobes.h>
+#include <linux/hugetlb.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+
+#include <asm/system.h>
+#include <asm/pgalloc.h>
+#include <asm/sections.h>
+#include <asm/traps.h>
+#include <asm/syscalls.h>
+
+#include <arch/interrupts.h>
+
+static noinline void force_sig_info_fault(int si_signo, int si_code,
+        unsigned long address, int fault_num, struct task_struct *tsk)
+{
+        siginfo_t info;
+
+        if (unlikely(tsk->pid < 2)) {
+                panic("Signal %d (code %d) at %#lx sent to %s!",
+                      si_signo, si_code & 0xffff, address,
+                      tsk->pid ? "init" : "the idle task");
+        }
+
+        info.si_signo = si_signo;
+        info.si_errno = 0;
+        info.si_code = si_code;
+        info.si_addr = (void __user *)address;
+        info.si_trapno = fault_num;
+        force_sig_info(si_signo, &info, tsk);
+}
+
+#ifndef __tilegx__
+/*
+ * Synthesize the fault a PL0 process would get by doing a word-load of
+ * an unaligned address or a high kernel address.  Called indirectly
+ * from sys_cmpxchg() in kernel/intvec.S.
+ */
+int _sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *regs)
+{
+        if (address >= PAGE_OFFSET)
+                force_sig_info_fault(SIGSEGV, SEGV_MAPERR, address,
+                                     INT_DTLB_MISS, current);
+        else
+                force_sig_info_fault(SIGBUS, BUS_ADRALN, address,
+                                     INT_UNALIGN_DATA, current);
+
+        /*
+         * Adjust pc to point at the actual instruction, which is unusual
+         * for syscalls normally, but is appropriate when we are claiming
+         * that a syscall swint1 caused a page fault or bus error.
+         */
+        regs->pc -= 8;
+
+        /*
+         * Mark this as a caller-save interrupt, like a normal page fault,
+         * so that when we go through the signal handler path we will
+         * properly restore r0, r1, and r2 for the signal handler arguments.
+         */
+        regs->flags |= PT_FLAGS_CALLER_SAVES;
+
+        return 0;
+}
+#endif
+
+static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
+{
+        unsigned index = pgd_index(address);
+        pgd_t *pgd_k;
+        pud_t *pud, *pud_k;
+        pmd_t *pmd, *pmd_k;
+
+        pgd += index;
+        pgd_k = init_mm.pgd + index;
+
+        if (!pgd_present(*pgd_k))
+                return NULL;
+
+        pud = pud_offset(pgd, address);
+        pud_k = pud_offset(pgd_k, address);
+        if (!pud_present(*pud_k))
+                return NULL;
+
+        pmd = pmd_offset(pud, address);
+        pmd_k = pmd_offset(pud_k, address);
+        if (!pmd_present(*pmd_k))
+                return NULL;
+        if (!pmd_present(*pmd)) {
+                set_pmd(pmd, *pmd_k);
+                arch_flush_lazy_mmu_mode();
+        } else
+                BUG_ON(pmd_ptfn(*pmd) != pmd_ptfn(*pmd_k));
+        return pmd_k;
+}
+
+/*
+ * Handle a fault on the vmalloc or module mapping area
+ */
+static inline int vmalloc_fault(pgd_t *pgd, unsigned long address)
+{
+        pmd_t *pmd_k;
+        pte_t *pte_k;
+
+        /* Make sure we are in vmalloc area */
+        if (!(address >= VMALLOC_START && address < VMALLOC_END))
+                return -1;
+
+        /*
+         * Synchronize this task's top level page-table
+         * with the 'reference' page table.
+         */
+        pmd_k = vmalloc_sync_one(pgd, address);
+        if (!pmd_k)
+                return -1;
+        if (pmd_huge(*pmd_k))
+                return 0;   /* support TILE huge_vmap() API */
+        pte_k = pte_offset_kernel(pmd_k, address);
+        if (!pte_present(*pte_k))
+                return -1;
+        return 0;
+}
+
+/* Wait until this PTE has completed migration. */
+static void wait_for_migration(pte_t *pte)
+{
+        if (pte_migrating(*pte)) {
+                /*
+                 * Wait until the migrater fixes up this pte.
+                 * We scale the loop count by the clock rate so we'll wait for
+                 * a few seconds here.
+                 */
+                int retries = 0;
+                int bound = get_clock_rate();
+                while (pte_migrating(*pte)) {
+                        barrier();
+                        if (++retries > bound)
+                                panic("Hit migrating PTE (%#llx) and"
+                                      " page PFN %#lx still migrating",
+                                      pte->val, pte_pfn(*pte));
+                }
+        }
+}
+
+/*
+ * It's not generally safe to use "current" to get the page table pointer,
+ * since we might be running an oprofile interrupt in the middle of a
+ * task switch.
+ */
+static pgd_t *get_current_pgd(void)
+{
+        HV_Context ctx = hv_inquire_context();
+        unsigned long pgd_pfn = ctx.page_table >> PAGE_SHIFT;
+        struct page *pgd_page = pfn_to_page(pgd_pfn);
+        BUG_ON(PageHighMem(pgd_page));   /* oops, HIGHPTE? */
+        return (pgd_t *) __va(ctx.page_table);
+}
+
+/*
+ * We can receive a page fault from a migrating PTE at any time.
+ * Handle it by just waiting until the fault resolves.
+ *
+ * It's also possible to get a migrating kernel PTE that resolves
+ * itself during the downcall from hypervisor to Linux.  We just check
+ * here to see if the PTE seems valid, and if so we retry it.
+ *
+ * NOTE! We MUST NOT take any locks for this case.  We may be in an
+ * interrupt or a critical region, and must do as little as possible.
+ * Similarly, we can't use atomic ops here, since we may be handling a
+ * fault caused by an atomic op access.
+ */
+static int handle_migrating_pte(pgd_t *pgd, int fault_num,
+                                unsigned long address,
+                                int is_kernel_mode, int write)
+{
+        pud_t *pud;
+        pmd_t *pmd;
+        pte_t *pte;
+        pte_t pteval;
+
+        if (pgd_addr_invalid(address))
+                return 0;
+
+        pgd += pgd_index(address);
+        pud = pud_offset(pgd, address);
+        if (!pud || !pud_present(*pud))
+                return 0;
+        pmd = pmd_offset(pud, address);
+        if (!pmd || !pmd_present(*pmd))
+                return 0;
+        pte = pmd_huge_page(*pmd) ? ((pte_t *)pmd) :
+                pte_offset_kernel(pmd, address);
+        pteval = *pte;
+        if (pte_migrating(pteval)) {
+                wait_for_migration(pte);
+                return 1;
+        }
+
+        if (!is_kernel_mode || !pte_present(pteval))
+                return 0;
+        if (fault_num == INT_ITLB_MISS) {
+                if (pte_exec(pteval))
+                        return 1;
+        } else if (write) {
+                if (pte_write(pteval))
+                        return 1;
+        } else {
+                if (pte_read(pteval))
+                        return 1;
+        }
+
+        return 0;
+}
+
+/*
+ * This routine is responsible for faulting in user pages.
+ * It passes the work off to one of the appropriate routines.
+ * It returns true if the fault was successfully handled.
+ */
+static int handle_page_fault(struct pt_regs *regs,
+                             int fault_num,
+                             int is_page_fault,
+                             unsigned long address,
+                             int write)
+{
+        struct task_struct *tsk;
+        struct mm_struct *mm;
+        struct vm_area_struct *vma;
+        unsigned long stack_offset;
+        int fault;
+        int si_code;
+        int is_kernel_mode;
+        pgd_t *pgd;
+
+        /* on TILE, protection faults are always writes */
+        if (!is_page_fault)
+                write = 1;
+
+        is_kernel_mode = (EX1_PL(regs->ex1) != USER_PL);
+
+        tsk = validate_current();
+
+        /*
+         * Check to see if we might be overwriting the stack, and bail
+         * out if so.  The page fault code is a relatively likely
+         * place to get trapped in an infinite regress, and once we
+         * overwrite the whole stack, it becomes very hard to recover.
+         */
+        stack_offset = stack_pointer & (THREAD_SIZE-1);
+        if (stack_offset < THREAD_SIZE / 8) {
+                pr_alert("Potential stack overrun: sp %#lx\n",
+                       stack_pointer);
+                show_regs(regs);
+                pr_alert("Killing current process %d/%s\n",
+                       tsk->pid, tsk->comm);
+                do_group_exit(SIGKILL);
+        }
+
+        /*
+         * Early on, we need to check for migrating PTE entries;
+         * see homecache.c.  If we find a migrating PTE, we wait until
+         * the backing page claims to be done migrating, then we procede.
+         * For kernel PTEs, we rewrite the PTE and return and retry.
+         * Otherwise, we treat the fault like a normal "no PTE" fault,
+         * rather than trying to patch up the existing PTE.
+         */
+        pgd = get_current_pgd();
+        if (handle_migrating_pte(pgd, fault_num, address,
+                                 is_kernel_mode, write))
+                return 1;
+
+        si_code = SEGV_MAPERR;
+
+        /*
+         * We fault-in kernel-space virtual memory on-demand. The
+         * 'reference' page table is init_mm.pgd.
+         *
+         * NOTE! We MUST NOT take any locks for this case. We may
+         * be in an interrupt or a critical region, and should
+         * only copy the information from the master page table,
+         * nothing more.
+         *
+         * This verifies that the fault happens in kernel space
+         * and that the fault was not a protection fault.
+         */
+        if (unlikely(address >= TASK_SIZE &&
+                     !is_arch_mappable_range(address, 0))) {
+                if (is_kernel_mode && is_page_fault &&
+                    vmalloc_fault(pgd, address) >= 0)
+                        return 1;
+                /*
+                 * Don't take the mm semaphore here. If we fixup a prefetch
+                 * fault we could otherwise deadlock.
+                 */
+                mm = NULL;  /* happy compiler */
+                vma = NULL;
+                goto bad_area_nosemaphore;
+        }
+
+        /*
+         * If we're trying to touch user-space addresses, we must
+         * be either at PL0, or else with interrupts enabled in the
+         * kernel, so either way we can re-enable interrupts here.
+         */
+        local_irq_enable();
+
+        mm = tsk->mm;
+
+        /*
+         * If we're in an interrupt, have no user context or are running in an
+         * atomic region then we must not take the fault.
+         */
+        if (in_atomic() || !mm) {
+                vma = NULL;  /* happy compiler */
+                goto bad_area_nosemaphore;
+        }
+
+        /*
+         * When running in the kernel we expect faults to occur only to
+         * addresses in user space.  All other faults represent errors in the
+         * kernel and should generate an OOPS.  Unfortunately, in the case of an
+         * erroneous fault occurring in a code path which already holds mmap_sem
+         * we will deadlock attempting to validate the fault against the
+         * address space.  Luckily the kernel only validly references user
+         * space from well defined areas of code, which are listed in the
+         * exceptions table.
+         *
+         * As the vast majority of faults will be valid we will only perform
+         * the source reference check when there is a possibility of a deadlock.
+         * Attempt to lock the address space, if we cannot we then validate the
+         * source.  If this is invalid we can skip the address space check,
+         * thus avoiding the deadlock.
+         */
+        if (!down_read_trylock(&mm->mmap_sem)) {
+                if (is_kernel_mode &&
+                    !search_exception_tables(regs->pc)) {
+                        vma = NULL;  /* happy compiler */
+                        goto bad_area_nosemaphore;
+                }
+                down_read(&mm->mmap_sem);
+        }
+
+        vma = find_vma(mm, address);
+        if (!vma)
+                goto bad_area;
+        if (vma->vm_start <= address)
+                goto good_area;
+        if (!(vma->vm_flags & VM_GROWSDOWN))
+                goto bad_area;
+        if (regs->sp < PAGE_OFFSET) {
+                /*
+                 * accessing the stack below sp is always a bug.
+                 */
+                if (address < regs->sp)
+                        goto bad_area;
+        }
+        if (expand_stack(vma, address))
+                goto bad_area;
+
+/*
+ * Ok, we have a good vm_area for this memory access, so
+ * we can handle it..
+ */
+good_area:
+        si_code = SEGV_ACCERR;
+        if (fault_num == INT_ITLB_MISS) {
+                if (!(vma->vm_flags & VM_EXEC))
+                        goto bad_area;
+        } else if (write) {
+#ifdef TEST_VERIFY_AREA
+                if (!is_page_fault && regs->cs == KERNEL_CS)
+                        pr_err("WP fault at "REGFMT"\n", regs->eip);
+#endif
+                if (!(vma->vm_flags & VM_WRITE))
+                        goto bad_area;
+        } else {
+                if (!is_page_fault || !(vma->vm_flags & VM_READ))
+                        goto bad_area;
+        }
+
+ survive:
+        /*
+         * If for any reason at all we couldn't handle the fault,
+         * make sure we exit gracefully rather than endlessly redo
+         * the fault.
+         */
+        fault = handle_mm_fault(mm, vma, address, write);
+        if (unlikely(fault & VM_FAULT_ERROR)) {
+                if (fault & VM_FAULT_OOM)
+                        goto out_of_memory;
+                else if (fault & VM_FAULT_SIGBUS)
+                        goto do_sigbus;
+                BUG();
+        }
+        if (fault & VM_FAULT_MAJOR)
+                tsk->maj_flt++;
+        else
+                tsk->min_flt++;
+
+#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
+        /*
+         * If this was an asynchronous fault,
+         * restart the appropriate engine.
+         */
+        switch (fault_num) {
+#if CHIP_HAS_TILE_DMA()
+        case INT_DMATLB_MISS:
+        case INT_DMATLB_MISS_DWNCL:
+        case INT_DMATLB_ACCESS:
+        case INT_DMATLB_ACCESS_DWNCL:
+                __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__REQUEST_MASK);
+                break;
+#endif
+#if CHIP_HAS_SN_PROC()
+        case INT_SNITLB_MISS:
+        case INT_SNITLB_MISS_DWNCL:
+                __insn_mtspr(SPR_SNCTL,
+                             __insn_mfspr(SPR_SNCTL) &
+                             ~SPR_SNCTL__FRZPROC_MASK);
+                break;
+#endif
+        }
+#endif
+
+        up_read(&mm->mmap_sem);
+        return 1;
+
+/*
+ * Something tried to access memory that isn't in our memory map..
+ * Fix it, but check if it's kernel or user first..
+ */
+bad_area:
+        up_read(&mm->mmap_sem);
+
+bad_area_nosemaphore:
+        /* User mode accesses just cause a SIGSEGV */
+        if (!is_kernel_mode) {
+                /*
+                 * It's possible to have interrupts off here.
+                 */
+                local_irq_enable();
+
+                force_sig_info_fault(SIGSEGV, si_code, address,
+                                     fault_num, tsk);
+                return 0;
+        }
+
+no_context:
+        /* Are we prepared to handle this kernel fault?  */
+        if (fixup_exception(regs))
+                return 0;
+
+/*
+ * Oops. The kernel tried to access some bad page. We'll have to
+ * terminate things with extreme prejudice.
+ */
+
+        bust_spinlocks(1);
+
+        /* FIXME: no lookup_address() yet */
+#ifdef SUPPORT_LOOKUP_ADDRESS
+        if (fault_num == INT_ITLB_MISS) {
+                pte_t *pte = lookup_address(address);
+
+                if (pte && pte_present(*pte) && !pte_exec_kernel(*pte))
+                        pr_crit("kernel tried to execute"
+                               " non-executable page - exploit attempt?"
+                               " (uid: %d)\n", current->uid);
+        }
+#endif
+        if (address < PAGE_SIZE)
+                pr_alert("Unable to handle kernel NULL pointer dereference\n");
+        else
+                pr_alert("Unable to handle kernel paging request\n");
+        pr_alert(" at virtual address "REGFMT", pc "REGFMT"\n",
+                 address, regs->pc);
+
+        show_regs(regs);
+
+        if (unlikely(tsk->pid < 2)) {
+                panic("Kernel page fault running %s!",
+                      tsk->pid ? "init" : "the idle task");
+        }
+
+        /*
+         * More FIXME: we should probably copy the i386 here and
+         * implement a generic die() routine.  Not today.
+         */
+#ifdef SUPPORT_DIE
+        die("Oops", regs);
+#endif
+        bust_spinlocks(1);
+
+        do_group_exit(SIGKILL);
+
+/*
+ * We ran out of memory, or some other thing happened to us that made
+ * us unable to handle the page fault gracefully.
+ */
+out_of_memory:
+        up_read(&mm->mmap_sem);
+        if (is_global_init(tsk)) {
+                yield();
+                down_read(&mm->mmap_sem);
+                goto survive;
+        }
+        pr_alert("VM: killing process %s\n", tsk->comm);
+        if (!is_kernel_mode)
+                do_group_exit(SIGKILL);
+        goto no_context;
+
+do_sigbus:
+        up_read(&mm->mmap_sem);
+
+        /* Kernel mode? Handle exceptions or die */
+        if (is_kernel_mode)
+                goto no_context;
+
+        force_sig_info_fault(SIGBUS, BUS_ADRERR, address, fault_num, tsk);
+        return 0;
+}
+
+#ifndef __tilegx__
+
+/* We must release ICS before panicking or we won't get anywhere. */
+#define ics_panic(fmt, ...) do { \
+        __insn_mtspr(SPR_INTERRUPT_CRITICAL_SECTION, 0); \
+        panic(fmt, __VA_ARGS__); \
+} while (0)
+
+/*
+ * When we take an ITLB or DTLB fault or access violation in the
+ * supervisor while the critical section bit is set, the hypervisor is
+ * reluctant to write new values into the EX_CONTEXT_1_x registers,
+ * since that might indicate we have not yet squirreled the SPR
+ * contents away and can thus safely take a recursive interrupt.
+ * Accordingly, the hypervisor passes us the PC via SYSTEM_SAVE_1_2.
+ *
+ * Note that this routine is called before homecache_tlb_defer_enter(),
+ * which means that we can properly unlock any atomics that might
+ * be used there (good), but also means we must be very sensitive
+ * to not touch any data structures that might be located in memory
+ * that could migrate, as we could be entering the kernel on a dataplane
+ * cpu that has been deferring kernel TLB updates.  This means, for
+ * example, that we can't migrate init_mm or its pgd.
+ */
+struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num,
+                                      unsigned long address,
+                                      unsigned long info)
+{
+        unsigned long pc = info & ~1;
+        int write = info & 1;
+        pgd_t *pgd = get_current_pgd();
+
+        /* Retval is 1 at first since we will handle the fault fully. */
+        struct intvec_state state = {
+                do_page_fault, fault_num, address, write, 1
+        };
+
+        /* Validate that we are plausibly in the right routine. */
+        if ((pc & 0x7) != 0 || pc < PAGE_OFFSET ||
+            (fault_num != INT_DTLB_MISS &&
+             fault_num != INT_DTLB_ACCESS)) {
+                unsigned long old_pc = regs->pc;
+                regs->pc = pc;
+                ics_panic("Bad ICS page fault args:"
+                          " old PC %#lx, fault %d/%d at %#lx\n",
+                          old_pc, fault_num, write, address);
+        }
+
+        /* We might be faulting on a vmalloc page, so check that first. */
+        if (fault_num != INT_DTLB_ACCESS && vmalloc_fault(pgd, address) >= 0)
+                return state;
+
+        /*
+         * If we faulted with ICS set in sys_cmpxchg, we are providing
+         * a user syscall service that should generate a signal on
+         * fault.  We didn't set up a kernel stack on initial entry to
+         * sys_cmpxchg, but instead had one set up by the fault, which
+         * (because sys_cmpxchg never releases ICS) came to us via the
+         * SYSTEM_SAVE_1_2 mechanism, and thus EX_CONTEXT_1_[01] are
+         * still referencing the original user code.  We release the
+         * atomic lock and rewrite pt_regs so that it appears that we
+         * came from user-space directly, and after we finish the
+         * fault we'll go back to user space and re-issue the swint.
+         * This way the backtrace information is correct if we need to
+         * emit a stack dump at any point while handling this.
+         *
+         * Must match register use in sys_cmpxchg().
+         */
+        if (pc >= (unsigned long) sys_cmpxchg &&
+            pc < (unsigned long) __sys_cmpxchg_end) {
+#ifdef CONFIG_SMP
+                /* Don't unlock before we could have locked. */
+                if (pc >= (unsigned long)__sys_cmpxchg_grab_lock) {
+                        int *lock_ptr = (int *)(regs->regs[ATOMIC_LOCK_REG]);
+                        __atomic_fault_unlock(lock_ptr);
+                }
+#endif
+                regs->sp = regs->regs[27];
+        }
+
+        /*
+         * We can also fault in the atomic assembly, in which
+         * case we use the exception table to do the first-level fixup.
+         * We may re-fixup again in the real fault handler if it
+         * turns out the faulting address is just bad, and not,
+         * for example, migrating.
+         */
+        else if (pc >= (unsigned long) __start_atomic_asm_code &&
+                   pc < (unsigned long) __end_atomic_asm_code) {
+                const struct exception_table_entry *fixup;
+#ifdef CONFIG_SMP
+                /* Unlock the atomic lock. */
+                int *lock_ptr = (int *)(regs->regs[ATOMIC_LOCK_REG]);
+                __atomic_fault_unlock(lock_ptr);
+#endif
+                fixup = search_exception_tables(pc);
+                if (!fixup)
+                        ics_panic("ICS atomic fault not in table:"
+                                  " PC %#lx, fault %d", pc, fault_num);
+                regs->pc = fixup->fixup;
+                regs->ex1 = PL_ICS_EX1(KERNEL_PL, 0);
+        }
+
+        /*
+         * NOTE: the one other type of access that might bring us here
+         * are the memory ops in __tns_atomic_acquire/__tns_atomic_release,
+         * but we don't have to check specially for them since we can
+         * always safely return to the address of the fault and retry,
+         * since no separate atomic locks are involved.
+         */
+
+        /*
+         * Now that we have released the atomic lock (if necessary),
+         * it's safe to spin if the PTE that caused the fault was migrating.
+         */
+        if (fault_num == INT_DTLB_ACCESS)
+                write = 1;
+        if (handle_migrating_pte(pgd, fault_num, address, 1, write))
+                return state;
+
+        /* Return zero so that we continue on with normal fault handling. */
+        state.retval = 0;
+        return state;
+}
+
+#endif /* !__tilegx__ */
+
+/*
+ * This routine handles page faults.  It determines the address, and the
+ * problem, and then passes it handle_page_fault() for normal DTLB and
+ * ITLB issues, and for DMA or SN processor faults when we are in user
+ * space.  For the latter, if we're in kernel mode, we just save the
+ * interrupt away appropriately and return immediately.  We can't do
+ * page faults for user code while in kernel mode.
+ */
+void do_page_fault(struct pt_regs *regs, int fault_num,
+                   unsigned long address, unsigned long write)
+{
+        int is_page_fault;
+
+        /* This case should have been handled by do_page_fault_ics(). */
+        BUG_ON(write & ~1);
+
+#if CHIP_HAS_TILE_DMA()
+        /*
+         * If it's a DMA fault, suspend the transfer while we're
+         * handling the miss; we'll restart after it's handled.  If we
+         * don't suspend, it's possible that this process could swap
+         * out and back in, and restart the engine since the DMA is
+         * still 'running'.
+         */
+        if (fault_num == INT_DMATLB_MISS ||
+            fault_num == INT_DMATLB_ACCESS ||
+            fault_num == INT_DMATLB_MISS_DWNCL ||
+            fault_num == INT_DMATLB_ACCESS_DWNCL) {
+                __insn_mtspr(SPR_DMA_CTR, SPR_DMA_CTR__SUSPEND_MASK);
+                while (__insn_mfspr(SPR_DMA_USER_STATUS) &
+                       SPR_DMA_STATUS__BUSY_MASK)
+                        ;
+        }
+#endif
+
+        /* Validate fault num and decide if this is a first-time page fault. */
+        switch (fault_num) {
+        case INT_ITLB_MISS:
+        case INT_DTLB_MISS:
+#if CHIP_HAS_TILE_DMA()
+        case INT_DMATLB_MISS:
+        case INT_DMATLB_MISS_DWNCL:
+#endif
+#if CHIP_HAS_SN_PROC()
+        case INT_SNITLB_MISS:
+        case INT_SNITLB_MISS_DWNCL:
+#endif
+                is_page_fault = 1;
+                break;
+
+        case INT_DTLB_ACCESS:
+#if CHIP_HAS_TILE_DMA()
+        case INT_DMATLB_ACCESS:
+        case INT_DMATLB_ACCESS_DWNCL:
+#endif
+                is_page_fault = 0;
+                break;
+
+        default:
+                panic("Bad fault number %d in do_page_fault", fault_num);
+        }
+
+        if (EX1_PL(regs->ex1) != USER_PL) {
+                struct async_tlb *async;
+                switch (fault_num) {
+#if CHIP_HAS_TILE_DMA()
+                case INT_DMATLB_MISS:
+                case INT_DMATLB_ACCESS:
+                case INT_DMATLB_MISS_DWNCL:
+                case INT_DMATLB_ACCESS_DWNCL:
+                        async = &current->thread.dma_async_tlb;
+                        break;
+#endif
+#if CHIP_HAS_SN_PROC()
+                case INT_SNITLB_MISS:
+                case INT_SNITLB_MISS_DWNCL:
+                        async = &current->thread.sn_async_tlb;
+                        break;
+#endif
+                default:
+                        async = NULL;
+                }
+                if (async) {
+
+                        /*
+                         * No vmalloc check required, so we can allow
+                         * interrupts immediately at this point.
+                         */
+                        local_irq_enable();
+
+                        set_thread_flag(TIF_ASYNC_TLB);
+                        if (async->fault_num != 0) {
+                                panic("Second async fault %d;"
+                                      " old fault was %d (%#lx/%ld)",
+                                      fault_num, async->fault_num,
+                                      address, write);
+                        }
+                        BUG_ON(fault_num == 0);
+                        async->fault_num = fault_num;
+                        async->is_fault = is_page_fault;
+                        async->is_write = write;
+                        async->address = address;
+                        return;
+                }
+        }
+
+        handle_page_fault(regs, fault_num, is_page_fault, address, write);
+}
+
+
+#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
+/*
+ * Check an async_tlb structure to see if a deferred fault is waiting,
+ * and if so pass it to the page-fault code.
+ */
+static void handle_async_page_fault(struct pt_regs *regs,
+                                    struct async_tlb *async)
+{
+        if (async->fault_num) {
+                /*
+                 * Clear async->fault_num before calling the page-fault
+                 * handler so that if we re-interrupt before returning
+                 * from the function we have somewhere to put the
+                 * information from the new interrupt.
+                 */
+                int fault_num = async->fault_num;
+                async->fault_num = 0;
+                handle_page_fault(regs, fault_num, async->is_fault,
+                                  async->address, async->is_write);
+        }
+}
+#endif /* CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() */
+
+
+/*
+ * This routine effectively re-issues asynchronous page faults
+ * when we are returning to user space.
+ */
+void do_async_page_fault(struct pt_regs *regs)
+{
+        /*
+         * Clear thread flag early.  If we re-interrupt while processing
+         * code here, we will reset it and recall this routine before
+         * returning to user space.
+         */
+        clear_thread_flag(TIF_ASYNC_TLB);
+
+#if CHIP_HAS_TILE_DMA()
+        handle_async_page_fault(regs, &current->thread.dma_async_tlb);
+#endif
+#if CHIP_HAS_SN_PROC()
+        handle_async_page_fault(regs, &current->thread.sn_async_tlb);
+#endif
+}
+
+void vmalloc_sync_all(void)
+{
+#ifdef __tilegx__
+        /* Currently all L1 kernel pmd's are static and shared. */
+        BUG_ON(pgd_index(VMALLOC_END) != pgd_index(VMALLOC_START));
+#else
+        /*
+         * Note that races in the updates of insync and start aren't
+         * problematic: insync can only get set bits added, and updates to
+         * start are only improving performance (without affecting correctness
+         * if undone).
+         */
+        static DECLARE_BITMAP(insync, PTRS_PER_PGD);
+        static unsigned long start = PAGE_OFFSET;
+        unsigned long address;
+
+        BUILD_BUG_ON(PAGE_OFFSET & ~PGDIR_MASK);
+        for (address = start; address >= PAGE_OFFSET; address += PGDIR_SIZE) {
+                if (!test_bit(pgd_index(address), insync)) {
+                        unsigned long flags;
+                        struct list_head *pos;
+
+                        spin_lock_irqsave(&pgd_lock, flags);
+                        list_for_each(pos, &pgd_list)
+                                if (!vmalloc_sync_one(list_to_pgd(pos),
+                                                                address)) {
+                                        /* Must be at first entry in list. */
+                                        BUG_ON(pos != pgd_list.next);
+                                        break;
+                                }
+                        spin_unlock_irqrestore(&pgd_lock, flags);
+                        if (pos != pgd_list.next)
+                                set_bit(pgd_index(address), insync);
+                }
+                if (address == start && test_bit(pgd_index(address), insync))
+                        start = address + PGDIR_SIZE;
+        }
+#endif
+}
diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c
new file mode 100644
index 000000000000..12ab137e7d4f
--- /dev/null
+++ b/arch/tile/mm/highmem.c
@@ -0,0 +1,328 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <asm/homecache.h>
+
+#define kmap_get_pte(vaddr) \
+        pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)),\
+                (vaddr)), (vaddr))
+
+
+void *kmap(struct page *page)
+{
+        void *kva;
+        unsigned long flags;
+        pte_t *ptep;
+
+        might_sleep();
+        if (!PageHighMem(page))
+                return page_address(page);
+        kva = kmap_high(page);
+
+        /*
+         * Rewrite the PTE under the lock.  This ensures that the page
+         * is not currently migrating.
+         */
+        ptep = kmap_get_pte((unsigned long)kva);
+        flags = homecache_kpte_lock();
+        set_pte_at(&init_mm, kva, ptep, mk_pte(page, page_to_kpgprot(page)));
+        homecache_kpte_unlock(flags);
+
+        return kva;
+}
+EXPORT_SYMBOL(kmap);
+
+void kunmap(struct page *page)
+{
+        if (in_interrupt())
+                BUG();
+        if (!PageHighMem(page))
+                return;
+        kunmap_high(page);
+}
+EXPORT_SYMBOL(kunmap);
+
+static void debug_kmap_atomic_prot(enum km_type type)
+{
+#ifdef CONFIG_DEBUG_HIGHMEM
+        static unsigned warn_count = 10;
+
+        if (unlikely(warn_count == 0))
+                return;
+
+        if (unlikely(in_interrupt())) {
+                if (in_irq()) {
+                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
+                            type != KM_BIO_SRC_IRQ &&
+                            /* type != KM_BIO_DST_IRQ && */
+                            type != KM_BOUNCE_READ) {
+                                WARN_ON(1);
+                                warn_count--;
+                        }
+                } else if (!irqs_disabled()) {  /* softirq */
+                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
+                            type != KM_SOFTIRQ0 && type != KM_SOFTIRQ1 &&
+                            type != KM_SKB_SUNRPC_DATA &&
+                            type != KM_SKB_DATA_SOFTIRQ &&
+                            type != KM_BOUNCE_READ) {
+                                WARN_ON(1);
+                                warn_count--;
+                        }
+                }
+        }
+
+        if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ ||
+            type == KM_BIO_SRC_IRQ /* || type == KM_BIO_DST_IRQ */) {
+                if (!irqs_disabled()) {
+                        WARN_ON(1);
+                        warn_count--;
+                }
+        } else if (type == KM_SOFTIRQ0 || type == KM_SOFTIRQ1) {
+                if (irq_count() == 0 && !irqs_disabled()) {
+                        WARN_ON(1);
+                        warn_count--;
+                }
+        }
+#endif
+}
+
+/*
+ * Describe a single atomic mapping of a page on a given cpu at a
+ * given address, and allow it to be linked into a list.
+ */
+struct atomic_mapped_page {
+        struct list_head list;
+        struct page *page;
+        int cpu;
+        unsigned long va;
+};
+
+static spinlock_t amp_lock = __SPIN_LOCK_UNLOCKED(&amp_lock);
+static struct list_head amp_list = LIST_HEAD_INIT(amp_list);
+
+/*
+ * Combining this structure with a per-cpu declaration lets us give
+ * each cpu an atomic_mapped_page structure per type.
+ */
+struct kmap_amps {
+        struct atomic_mapped_page per_type[KM_TYPE_NR];
+};
+static DEFINE_PER_CPU(struct kmap_amps, amps);
+
+/*
+ * Add a page and va, on this cpu, to the list of kmap_atomic pages,
+ * and write the new pte to memory.  Writing the new PTE under the
+ * lock guarantees that it is either on the list before migration starts
+ * (if we won the race), or set_pte() sets the migrating bit in the PTE
+ * (if we lost the race).  And doing it under the lock guarantees
+ * that when kmap_atomic_fix_one_pte() comes along, it finds a valid
+ * PTE in memory, iff the mapping is still on the amp_list.
+ *
+ * Finally, doing it under the lock lets us safely examine the page
+ * to see if it is immutable or not, for the generic kmap_atomic() case.
+ * If we examine it earlier we are exposed to a race where it looks
+ * writable earlier, but becomes immutable before we write the PTE.
+ */
+static void kmap_atomic_register(struct page *page, enum km_type type,
+                                 unsigned long va, pte_t *ptep, pte_t pteval)
+{
+        unsigned long flags;
+        struct atomic_mapped_page *amp;
+
+        flags = homecache_kpte_lock();
+        spin_lock(&amp_lock);
+
+        /* With interrupts disabled, now fill in the per-cpu info. */
+        amp = &__get_cpu_var(amps).per_type[type];
+        amp->page = page;
+        amp->cpu = smp_processor_id();
+        amp->va = va;
+
+        /* For generic kmap_atomic(), choose the PTE writability now. */
+        if (!pte_read(pteval))
+                pteval = mk_pte(page, page_to_kpgprot(page));
+
+        list_add(&amp->list, &amp_list);
+        set_pte(ptep, pteval);
+        arch_flush_lazy_mmu_mode();
+
+        spin_unlock(&amp_lock);
+        homecache_kpte_unlock(flags);
+}
+
+/*
+ * Remove a page and va, on this cpu, from the list of kmap_atomic pages.
+ * Linear-time search, but we count on the lists being short.
+ * We don't need to adjust the PTE under the lock (as opposed to the
+ * kmap_atomic_register() case), since we're just unconditionally
+ * zeroing the PTE after it's off the list.
+ */
+static void kmap_atomic_unregister(struct page *page, unsigned long va)
+{
+        unsigned long flags;
+        struct atomic_mapped_page *amp;
+        int cpu = smp_processor_id();
+        spin_lock_irqsave(&amp_lock, flags);
+        list_for_each_entry(amp, &amp_list, list) {
+                if (amp->page == page && amp->cpu == cpu && amp->va == va)
+                        break;
+        }
+        BUG_ON(&amp->list == &amp_list);
+        list_del(&amp->list);
+        spin_unlock_irqrestore(&amp_lock, flags);
+}
+
+/* Helper routine for kmap_atomic_fix_kpte(), below. */
+static void kmap_atomic_fix_one_kpte(struct atomic_mapped_page *amp,
+                                     int finished)
+{
+        pte_t *ptep = kmap_get_pte(amp->va);
+        if (!finished) {
+                set_pte(ptep, pte_mkmigrate(*ptep));
+                flush_remote(0, 0, NULL, amp->va, PAGE_SIZE, PAGE_SIZE,
+                             cpumask_of(amp->cpu), NULL, 0);
+        } else {
+                /*
+                 * Rewrite a default kernel PTE for this page.
+                 * We rely on the fact that set_pte() writes the
+                 * present+migrating bits last.
+                 */
+                pte_t pte = mk_pte(amp->page, page_to_kpgprot(amp->page));
+                set_pte(ptep, pte);
+        }
+}
+
+/*
+ * This routine is a helper function for homecache_fix_kpte(); see
+ * its comments for more information on the "finished" argument here.
+ *
+ * Note that we hold the lock while doing the remote flushes, which
+ * will stall any unrelated cpus trying to do kmap_atomic operations.
+ * We could just update the PTEs under the lock, and save away copies
+ * of the structs (or just the va+cpu), then flush them after we
+ * release the lock, but it seems easier just to do it all under the lock.
+ */
+void kmap_atomic_fix_kpte(struct page *page, int finished)
+{
+        struct atomic_mapped_page *amp;
+        unsigned long flags;
+        spin_lock_irqsave(&amp_lock, flags);
+        list_for_each_entry(amp, &amp_list, list) {
+                if (amp->page == page)
+                        kmap_atomic_fix_one_kpte(amp, finished);
+        }
+        spin_unlock_irqrestore(&amp_lock, flags);
+}
+
+/*
+ * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap
+ * because the kmap code must perform a global TLB invalidation when
+ * the kmap pool wraps.
+ *
+ * Note that they may be slower than on x86 (etc.) because unlike on
+ * those platforms, we do have to take a global lock to map and unmap
+ * pages on Tile (see above).
+ *
+ * When holding an atomic kmap is is not legal to sleep, so atomic
+ * kmaps are appropriate for short, tight code paths only.
+ */
+void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
+{
+        enum fixed_addresses idx;
+        unsigned long vaddr;
+        pte_t *pte;
+
+        /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
+        pagefault_disable();
+
+        /* Avoid icache flushes by disallowing atomic executable mappings. */
+        BUG_ON(pte_exec(prot));
+
+        if (!PageHighMem(page))
+                return page_address(page);
+
+        debug_kmap_atomic_prot(type);
+
+        idx = type + KM_TYPE_NR*smp_processor_id();
+        vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+        pte = kmap_get_pte(vaddr);
+        BUG_ON(!pte_none(*pte));
+
+        /* Register that this page is mapped atomically on this cpu. */
+        kmap_atomic_register(page, type, vaddr, pte, mk_pte(page, prot));
+
+        return (void *)vaddr;
+}
+EXPORT_SYMBOL(kmap_atomic_prot);
+
+void *kmap_atomic(struct page *page, enum km_type type)
+{
+        /* PAGE_NONE is a magic value that tells us to check immutability. */
+        return kmap_atomic_prot(page, type, PAGE_NONE);
+}
+EXPORT_SYMBOL(kmap_atomic);
+
+void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+{
+        unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
+        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
+
+        /*
+         * Force other mappings to Oops if they try to access this pte without
+         * first remapping it.  Keeping stale mappings around is a bad idea.
+         */
+        if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx)) {
+                pte_t *pte = kmap_get_pte(vaddr);
+                pte_t pteval = *pte;
+                BUG_ON(!pte_present(pteval) && !pte_migrating(pteval));
+                kmap_atomic_unregister(pte_page(pteval), vaddr);
+                kpte_clear_flush(pte, vaddr);
+        } else {
+                /* Must be a lowmem page */
+                BUG_ON(vaddr < PAGE_OFFSET);
+                BUG_ON(vaddr >= (unsigned long)high_memory);
+        }
+
+        arch_flush_lazy_mmu_mode();
+        pagefault_enable();
+}
+EXPORT_SYMBOL(kunmap_atomic_notypecheck);
+
+/*
+ * This API is supposed to allow us to map memory without a "struct page".
+ * Currently we don't support this, though this may change in the future.
+ */
+void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
+{
+        return kmap_atomic(pfn_to_page(pfn), type);
+}
+void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
+{
+        return kmap_atomic_prot(pfn_to_page(pfn), type, prot);
+}
+
+struct page *kmap_atomic_to_page(void *ptr)
+{
+        pte_t *pte;
+        unsigned long vaddr = (unsigned long)ptr;
+
+        if (vaddr < FIXADDR_START)
+                return virt_to_page(ptr);
+
+        pte = kmap_get_pte(vaddr);
+        return pte_page(*pte);
+}
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c
new file mode 100644
index 000000000000..fb3b4a55cec4
--- /dev/null
+++ b/arch/tile/mm/homecache.c
@@ -0,0 +1,436 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This code maintains the "home" for each page in the system.
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/bootmem.h>
+#include <linux/rmap.h>
+#include <linux/pagemap.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/sysctl.h>
+#include <linux/pagevec.h>
+#include <linux/ptrace.h>
+#include <linux/timex.h>
+#include <linux/cache.h>
+#include <linux/smp.h>
+#include <linux/module.h>
+
+#include <asm/page.h>
+#include <asm/sections.h>
+#include <asm/tlbflush.h>
+#include <asm/pgalloc.h>
+#include <asm/homecache.h>
+
+#include "migrate.h"
+
+
+#if CHIP_HAS_COHERENT_LOCAL_CACHE()
+
+/*
+ * The noallocl2 option suppresses all use of the L2 cache to cache
+ * locally from a remote home.  There's no point in using it if we
+ * don't have coherent local caching, though.
+ */
+static int __write_once noallocl2;
+static int __init set_noallocl2(char *str)
+{
+        noallocl2 = 1;
+        return 0;
+}
+early_param("noallocl2", set_noallocl2);
+
+#else
+
+#define noallocl2 0
+
+#endif
+
+/* Provide no-op versions of these routines to keep flush_remote() cleaner. */
+#define mark_caches_evicted_start() 0
+#define mark_caches_evicted_finish(mask, timestamp) do {} while (0)
+
+
+/*
+ * Update the irq_stat for cpus that we are going to interrupt
+ * with TLB or cache flushes.  Also handle removing dataplane cpus
+ * from the TLB flush set, and setting dataplane_tlb_state instead.
+ */
+static void hv_flush_update(const struct cpumask *cache_cpumask,
+                            struct cpumask *tlb_cpumask,
+                            unsigned long tlb_va, unsigned long tlb_length,
+                            HV_Remote_ASID *asids, int asidcount)
+{
+        struct cpumask mask;
+        int i, cpu;
+
+        cpumask_clear(&mask);
+        if (cache_cpumask)
+                cpumask_or(&mask, &mask, cache_cpumask);
+        if (tlb_cpumask && tlb_length) {
+                cpumask_or(&mask, &mask, tlb_cpumask);
+        }
+
+        for (i = 0; i < asidcount; ++i)
+                cpumask_set_cpu(asids[i].y * smp_width + asids[i].x, &mask);
+
+        /*
+         * Don't bother to update atomically; losing a count
+         * here is not that critical.
+         */
+        for_each_cpu(cpu, &mask)
+                ++per_cpu(irq_stat, cpu).irq_hv_flush_count;
+}
+
+/*
+ * This wrapper function around hv_flush_remote() does several things:
+ *
+ *  - Provides a return value error-checking panic path, since
+ *    there's never any good reason for hv_flush_remote() to fail.
+ *  - Accepts a 32-bit PFN rather than a 64-bit PA, which generally
+ *    is the type that Linux wants to pass around anyway.
+ *  - Centralizes the mark_caches_evicted() handling.
+ *  - Canonicalizes that lengths of zero make cpumasks NULL.
+ *  - Handles deferring TLB flushes for dataplane tiles.
+ *  - Tracks remote interrupts in the per-cpu irq_cpustat_t.
+ *
+ * Note that we have to wait until the cache flush completes before
+ * updating the per-cpu last_cache_flush word, since otherwise another
+ * concurrent flush can race, conclude the flush has already
+ * completed, and start to use the page while it's still dirty
+ * remotely (running concurrently with the actual evict, presumably).
+ */
+void flush_remote(unsigned long cache_pfn, unsigned long cache_control,
+                  const struct cpumask *cache_cpumask_orig,
+                  HV_VirtAddr tlb_va, unsigned long tlb_length,
+                  unsigned long tlb_pgsize,
+                  const struct cpumask *tlb_cpumask_orig,
+                  HV_Remote_ASID *asids, int asidcount)
+{
+        int rc;
+        int timestamp = 0;  /* happy compiler */
+        struct cpumask cache_cpumask_copy, tlb_cpumask_copy;
+        struct cpumask *cache_cpumask, *tlb_cpumask;
+        HV_PhysAddr cache_pa;
+        char cache_buf[NR_CPUS*5], tlb_buf[NR_CPUS*5];
+
+        mb();   /* provided just to simplify "magic hypervisor" mode */
+
+        /*
+         * Canonicalize and copy the cpumasks.
+         */
+        if (cache_cpumask_orig && cache_control) {
+                cpumask_copy(&cache_cpumask_copy, cache_cpumask_orig);
+                cache_cpumask = &cache_cpumask_copy;
+        } else {
+                cpumask_clear(&cache_cpumask_copy);
+                cache_cpumask = NULL;
+        }
+        if (cache_cpumask == NULL)
+                cache_control = 0;
+        if (tlb_cpumask_orig && tlb_length) {
+                cpumask_copy(&tlb_cpumask_copy, tlb_cpumask_orig);
+                tlb_cpumask = &tlb_cpumask_copy;
+        } else {
+                cpumask_clear(&tlb_cpumask_copy);
+                tlb_cpumask = NULL;
+        }
+
+        hv_flush_update(cache_cpumask, tlb_cpumask, tlb_va, tlb_length,
+                        asids, asidcount);
+        cache_pa = (HV_PhysAddr)cache_pfn << PAGE_SHIFT;
+        if (cache_control & HV_FLUSH_EVICT_L2)
+                timestamp = mark_caches_evicted_start();
+        rc = hv_flush_remote(cache_pa, cache_control,
+                             cpumask_bits(cache_cpumask),
+                             tlb_va, tlb_length, tlb_pgsize,
+                             cpumask_bits(tlb_cpumask),
+                             asids, asidcount);
+        if (cache_control & HV_FLUSH_EVICT_L2)
+                mark_caches_evicted_finish(cache_cpumask, timestamp);
+        if (rc == 0)
+                return;
+        cpumask_scnprintf(cache_buf, sizeof(cache_buf), &cache_cpumask_copy);
+        cpumask_scnprintf(tlb_buf, sizeof(tlb_buf), &tlb_cpumask_copy);
+
+        pr_err("hv_flush_remote(%#llx, %#lx, %p [%s],"
+               " %#lx, %#lx, %#lx, %p [%s], %p, %d) = %d\n",
+               cache_pa, cache_control, cache_cpumask, cache_buf,
+               (unsigned long)tlb_va, tlb_length, tlb_pgsize,
+               tlb_cpumask, tlb_buf,
+               asids, asidcount, rc);
+        panic("Unsafe to continue.");
+}
+
+void homecache_evict(const struct cpumask *mask)
+{
+        flush_remote(0, HV_FLUSH_EVICT_L2, mask, 0, 0, 0, NULL, NULL, 0);
+}
+
+/* Return a mask of the cpus whose caches currently own these pages. */
+static void homecache_mask(struct page *page, int pages,
+                           struct cpumask *home_mask)
+{
+        int i;
+        cpumask_clear(home_mask);
+        for (i = 0; i < pages; ++i) {
+                int home = page_home(&page[i]);
+                if (home == PAGE_HOME_IMMUTABLE ||
+                    home == PAGE_HOME_INCOHERENT) {
+                        cpumask_copy(home_mask, cpu_possible_mask);
+                        return;
+                }
+#if CHIP_HAS_CBOX_HOME_MAP()
+                if (home == PAGE_HOME_HASH) {
+                        cpumask_or(home_mask, home_mask, &hash_for_home_map);
+                        continue;
+                }
+#endif
+                if (home == PAGE_HOME_UNCACHED)
+                        continue;
+                BUG_ON(home < 0 || home >= NR_CPUS);
+                cpumask_set_cpu(home, home_mask);
+        }
+}
+
+/*
+ * Return the passed length, or zero if it's long enough that we
+ * believe we should evict the whole L2 cache.
+ */
+static unsigned long cache_flush_length(unsigned long length)
+{
+        return (length >= CHIP_L2_CACHE_SIZE()) ? HV_FLUSH_EVICT_L2 : length;
+}
+
+/* On the simulator, confirm lines have been evicted everywhere. */
+static void validate_lines_evicted(unsigned long pfn, size_t length)
+{
+        sim_syscall(SIM_SYSCALL_VALIDATE_LINES_EVICTED,
+                    (HV_PhysAddr)pfn << PAGE_SHIFT, length);
+}
+
+/* Flush a page out of whatever cache(s) it is in. */
+void homecache_flush_cache(struct page *page, int order)
+{
+        int pages = 1 << order;
+        int length = cache_flush_length(pages * PAGE_SIZE);
+        unsigned long pfn = page_to_pfn(page);
+        struct cpumask home_mask;
+
+        homecache_mask(page, pages, &home_mask);
+        flush_remote(pfn, length, &home_mask, 0, 0, 0, NULL, NULL, 0);
+        validate_lines_evicted(pfn, pages * PAGE_SIZE);
+}
+
+
+/* Report the home corresponding to a given PTE. */
+static int pte_to_home(pte_t pte)
+{
+        if (hv_pte_get_nc(pte))
+                return PAGE_HOME_IMMUTABLE;
+        switch (hv_pte_get_mode(pte)) {
+        case HV_PTE_MODE_CACHE_TILE_L3:
+                return get_remote_cache_cpu(pte);
+        case HV_PTE_MODE_CACHE_NO_L3:
+                return PAGE_HOME_INCOHERENT;
+        case HV_PTE_MODE_UNCACHED:
+                return PAGE_HOME_UNCACHED;
+#if CHIP_HAS_CBOX_HOME_MAP()
+        case HV_PTE_MODE_CACHE_HASH_L3:
+                return PAGE_HOME_HASH;
+#endif
+        }
+        panic("Bad PTE %#llx\n", pte.val);
+}
+
+/* Update the home of a PTE if necessary (can also be used for a pgprot_t). */
+pte_t pte_set_home(pte_t pte, int home)
+{
+        /* Check for non-linear file mapping "PTEs" and pass them through. */
+        if (pte_file(pte))
+                return pte;
+
+#if CHIP_HAS_MMIO()
+        /* Check for MMIO mappings and pass them through. */
+        if (hv_pte_get_mode(pte) == HV_PTE_MODE_MMIO)
+                return pte;
+#endif
+
+
+        /*
+         * Only immutable pages get NC mappings.  If we have a
+         * non-coherent PTE, but the underlying page is not
+         * immutable, it's likely the result of a forced
+         * caching setting running up against ptrace setting
+         * the page to be writable underneath.  In this case,
+         * just keep the PTE coherent.
+         */
+        if (hv_pte_get_nc(pte) && home != PAGE_HOME_IMMUTABLE) {
+                pte = hv_pte_clear_nc(pte);
+                pr_err("non-immutable page incoherently referenced: %#llx\n",
+                       pte.val);
+        }
+
+        switch (home) {
+
+        case PAGE_HOME_UNCACHED:
+                pte = hv_pte_set_mode(pte, HV_PTE_MODE_UNCACHED);
+                break;
+
+        case PAGE_HOME_INCOHERENT:
+                pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_NO_L3);
+                break;
+
+        case PAGE_HOME_IMMUTABLE:
+                /*
+                 * We could home this page anywhere, since it's immutable,
+                 * but by default just home it to follow "hash_default".
+                 */
+                BUG_ON(hv_pte_get_writable(pte));
+                if (pte_get_forcecache(pte)) {
+                        /* Upgrade "force any cpu" to "No L3" for immutable. */
+                        if (hv_pte_get_mode(pte) == HV_PTE_MODE_CACHE_TILE_L3
+                            && pte_get_anyhome(pte)) {
+                                pte = hv_pte_set_mode(pte,
+                                                      HV_PTE_MODE_CACHE_NO_L3);
+                        }
+                } else
+#if CHIP_HAS_CBOX_HOME_MAP()
+                if (hash_default)
+                        pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_HASH_L3);
+                else
+#endif
+                        pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_NO_L3);
+                pte = hv_pte_set_nc(pte);
+                break;
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        case PAGE_HOME_HASH:
+                pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_HASH_L3);
+                break;
+#endif
+
+        default:
+                BUG_ON(home < 0 || home >= NR_CPUS ||
+                       !cpu_is_valid_lotar(home));
+                pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_TILE_L3);
+                pte = set_remote_cache_cpu(pte, home);
+                break;
+        }
+
+#if CHIP_HAS_NC_AND_NOALLOC_BITS()
+        if (noallocl2)
+                pte = hv_pte_set_no_alloc_l2(pte);
+
+        /* Simplify "no local and no l3" to "uncached" */
+        if (hv_pte_get_no_alloc_l2(pte) && hv_pte_get_no_alloc_l1(pte) &&
+            hv_pte_get_mode(pte) == HV_PTE_MODE_CACHE_NO_L3) {
+                pte = hv_pte_set_mode(pte, HV_PTE_MODE_UNCACHED);
+        }
+#endif
+
+        /* Checking this case here gives a better panic than from the hv. */
+        BUG_ON(hv_pte_get_mode(pte) == 0);
+
+        return pte;
+}
+EXPORT_SYMBOL(pte_set_home);
+
+/*
+ * The routines in this section are the "static" versions of the normal
+ * dynamic homecaching routines; they just set the home cache
+ * of a kernel page once, and require a full-chip cache/TLB flush,
+ * so they're not suitable for anything but infrequent use.
+ */
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+static inline int initial_page_home(void) { return PAGE_HOME_HASH; }
+#else
+static inline int initial_page_home(void) { return 0; }
+#endif
+
+int page_home(struct page *page)
+{
+        if (PageHighMem(page)) {
+                return initial_page_home();
+        } else {
+                unsigned long kva = (unsigned long)page_address(page);
+                return pte_to_home(*virt_to_pte(NULL, kva));
+        }
+}
+
+void homecache_change_page_home(struct page *page, int order, int home)
+{
+        int i, pages = (1 << order);
+        unsigned long kva;
+
+        BUG_ON(PageHighMem(page));
+        BUG_ON(page_count(page) > 1);
+        BUG_ON(page_mapcount(page) != 0);
+        kva = (unsigned long) page_address(page);
+        flush_remote(0, HV_FLUSH_EVICT_L2, &cpu_cacheable_map,
+                     kva, pages * PAGE_SIZE, PAGE_SIZE, cpu_online_mask,
+                     NULL, 0);
+
+        for (i = 0; i < pages; ++i, kva += PAGE_SIZE) {
+                pte_t *ptep = virt_to_pte(NULL, kva);
+                pte_t pteval = *ptep;
+                BUG_ON(!pte_present(pteval) || pte_huge(pteval));
+                *ptep = pte_set_home(pteval, home);
+        }
+}
+
+struct page *homecache_alloc_pages(gfp_t gfp_mask,
+                                   unsigned int order, int home)
+{
+        struct page *page;
+        BUG_ON(gfp_mask & __GFP_HIGHMEM);   /* must be lowmem */
+        page = alloc_pages(gfp_mask, order);
+        if (page)
+                homecache_change_page_home(page, order, home);
+        return page;
+}
+EXPORT_SYMBOL(homecache_alloc_pages);
+
+struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask,
+                                        unsigned int order, int home)
+{
+        struct page *page;
+        BUG_ON(gfp_mask & __GFP_HIGHMEM);   /* must be lowmem */
+        page = alloc_pages_node(nid, gfp_mask, order);
+        if (page)
+                homecache_change_page_home(page, order, home);
+        return page;
+}
+
+void homecache_free_pages(unsigned long addr, unsigned int order)
+{
+        struct page *page;
+
+        if (addr == 0)
+                return;
+
+        VM_BUG_ON(!virt_addr_valid((void *)addr));
+        page = virt_to_page((void *)addr);
+        if (put_page_testzero(page)) {
+                int pages = (1 << order);
+                homecache_change_page_home(page, order, initial_page_home());
+                while (pages--)
+                        __free_page(page++);
+        }
+}
diff --git a/arch/tile/mm/hugetlbpage.c b/arch/tile/mm/hugetlbpage.c
new file mode 100644
index 000000000000..24688b697a8d
--- /dev/null
+++ b/arch/tile/mm/hugetlbpage.c
@@ -0,0 +1,343 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * TILE Huge TLB Page Support for Kernel.
+ * Taken from i386 hugetlb implementation:
+ * Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
+ */
+
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/sysctl.h>
+#include <linux/mman.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+
+pte_t *huge_pte_alloc(struct mm_struct *mm,
+                      unsigned long addr, unsigned long sz)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pte_t *pte = NULL;
+
+        /* We do not yet support multiple huge page sizes. */
+        BUG_ON(sz != PMD_SIZE);
+
+        pgd = pgd_offset(mm, addr);
+        pud = pud_alloc(mm, pgd, addr);
+        if (pud)
+                pte = (pte_t *) pmd_alloc(mm, pud, addr);
+        BUG_ON(pte && !pte_none(*pte) && !pte_huge(*pte));
+
+        return pte;
+}
+
+pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pmd_t *pmd = NULL;
+
+        pgd = pgd_offset(mm, addr);
+        if (pgd_present(*pgd)) {
+                pud = pud_offset(pgd, addr);
+                if (pud_present(*pud))
+                        pmd = pmd_offset(pud, addr);
+        }
+        return (pte_t *) pmd;
+}
+
+#ifdef HUGETLB_TEST
+struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
+                              int write)
+{
+        unsigned long start = address;
+        int length = 1;
+        int nr;
+        struct page *page;
+        struct vm_area_struct *vma;
+
+        vma = find_vma(mm, addr);
+        if (!vma || !is_vm_hugetlb_page(vma))
+                return ERR_PTR(-EINVAL);
+
+        pte = huge_pte_offset(mm, address);
+
+        /* hugetlb should be locked, and hence, prefaulted */
+        WARN_ON(!pte || pte_none(*pte));
+
+        page = &pte_page(*pte)[vpfn % (HPAGE_SIZE/PAGE_SIZE)];
+
+        WARN_ON(!PageHead(page));
+
+        return page;
+}
+
+int pmd_huge(pmd_t pmd)
+{
+        return 0;
+}
+
+int pud_huge(pud_t pud)
+{
+        return 0;
+}
+
+struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
+                             pmd_t *pmd, int write)
+{
+        return NULL;
+}
+
+#else
+
+struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
+                              int write)
+{
+        return ERR_PTR(-EINVAL);
+}
+
+int pmd_huge(pmd_t pmd)
+{
+        return !!(pmd_val(pmd) & _PAGE_HUGE_PAGE);
+}
+
+int pud_huge(pud_t pud)
+{
+        return !!(pud_val(pud) & _PAGE_HUGE_PAGE);
+}
+
+struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
+                             pmd_t *pmd, int write)
+{
+        struct page *page;
+
+        page = pte_page(*(pte_t *)pmd);
+        if (page)
+                page += ((address & ~PMD_MASK) >> PAGE_SHIFT);
+        return page;
+}
+
+struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
+                             pud_t *pud, int write)
+{
+        struct page *page;
+
+        page = pte_page(*(pte_t *)pud);
+        if (page)
+                page += ((address & ~PUD_MASK) >> PAGE_SHIFT);
+        return page;
+}
+
+int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
+{
+        return 0;
+}
+
+#endif
+
+#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
+                unsigned long addr, unsigned long len,
+                unsigned long pgoff, unsigned long flags)
+{
+        struct hstate *h = hstate_file(file);
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma;
+        unsigned long start_addr;
+
+        if (len > mm->cached_hole_size) {
+                start_addr = mm->free_area_cache;
+        } else {
+                start_addr = TASK_UNMAPPED_BASE;
+                mm->cached_hole_size = 0;
+        }
+
+full_search:
+        addr = ALIGN(start_addr, huge_page_size(h));
+
+        for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+                /* At this point:  (!vma || addr < vma->vm_end). */
+                if (TASK_SIZE - len < addr) {
+                        /*
+                         * Start a new search - just in case we missed
+                         * some holes.
+                         */
+                        if (start_addr != TASK_UNMAPPED_BASE) {
+                                start_addr = TASK_UNMAPPED_BASE;
+                                mm->cached_hole_size = 0;
+                                goto full_search;
+                        }
+                        return -ENOMEM;
+                }
+                if (!vma || addr + len <= vma->vm_start) {
+                        mm->free_area_cache = addr + len;
+                        return addr;
+                }
+                if (addr + mm->cached_hole_size < vma->vm_start)
+                        mm->cached_hole_size = vma->vm_start - addr;
+                addr = ALIGN(vma->vm_end, huge_page_size(h));
+        }
+}
+
+static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
+                unsigned long addr0, unsigned long len,
+                unsigned long pgoff, unsigned long flags)
+{
+        struct hstate *h = hstate_file(file);
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma, *prev_vma;
+        unsigned long base = mm->mmap_base, addr = addr0;
+        unsigned long largest_hole = mm->cached_hole_size;
+        int first_time = 1;
+
+        /* don't allow allocations above current base */
+        if (mm->free_area_cache > base)
+                mm->free_area_cache = base;
+
+        if (len <= largest_hole) {
+                largest_hole = 0;
+                mm->free_area_cache  = base;
+        }
+try_again:
+        /* make sure it can fit in the remaining address space */
+        if (mm->free_area_cache < len)
+                goto fail;
+
+        /* either no address requested or cant fit in requested address hole */
+        addr = (mm->free_area_cache - len) & huge_page_mask(h);
+        do {
+                /*
+                 * Lookup failure means no vma is above this address,
+                 * i.e. return with success:
+                 */
+                vma = find_vma_prev(mm, addr, &prev_vma);
+                if (!vma) {
+                        return addr;
+                        break;
+                }
+
+                /*
+                 * new region fits between prev_vma->vm_end and
+                 * vma->vm_start, use it:
+                 */
+                if (addr + len <= vma->vm_start &&
+                            (!prev_vma || (addr >= prev_vma->vm_end))) {
+                        /* remember the address as a hint for next time */
+                        mm->cached_hole_size = largest_hole;
+                        mm->free_area_cache = addr;
+                        return addr;
+                } else {
+                        /* pull free_area_cache down to the first hole */
+                        if (mm->free_area_cache == vma->vm_end) {
+                                mm->free_area_cache = vma->vm_start;
+                                mm->cached_hole_size = largest_hole;
+                        }
+                }
+
+                /* remember the largest hole we saw so far */
+                if (addr + largest_hole < vma->vm_start)
+                        largest_hole = vma->vm_start - addr;
+
+                /* try just below the current vma->vm_start */
+                addr = (vma->vm_start - len) & huge_page_mask(h);
+
+        } while (len <= vma->vm_start);
+
+fail:
+        /*
+         * if hint left us with no space for the requested
+         * mapping then try again:
+         */
+        if (first_time) {
+                mm->free_area_cache = base;
+                largest_hole = 0;
+                first_time = 0;
+                goto try_again;
+        }
+        /*
+         * A failed mmap() very likely causes application failure,
+         * so fall back to the bottom-up function here. This scenario
+         * can happen with large stack limits and large mmap()
+         * allocations.
+         */
+        mm->free_area_cache = TASK_UNMAPPED_BASE;
+        mm->cached_hole_size = ~0UL;
+        addr = hugetlb_get_unmapped_area_bottomup(file, addr0,
+                        len, pgoff, flags);
+
+        /*
+         * Restore the topdown base:
+         */
+        mm->free_area_cache = base;
+        mm->cached_hole_size = ~0UL;
+
+        return addr;
+}
+
+unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
+                unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+        struct hstate *h = hstate_file(file);
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma;
+
+        if (len & ~huge_page_mask(h))
+                return -EINVAL;
+        if (len > TASK_SIZE)
+                return -ENOMEM;
+
+        if (flags & MAP_FIXED) {
+                if (prepare_hugepage_range(file, addr, len))
+                        return -EINVAL;
+                return addr;
+        }
+
+        if (addr) {
+                addr = ALIGN(addr, huge_page_size(h));
+                vma = find_vma(mm, addr);
+                if (TASK_SIZE - len >= addr &&
+                    (!vma || addr + len <= vma->vm_start))
+                        return addr;
+        }
+        if (current->mm->get_unmapped_area == arch_get_unmapped_area)
+                return hugetlb_get_unmapped_area_bottomup(file, addr, len,
+                                pgoff, flags);
+        else
+                return hugetlb_get_unmapped_area_topdown(file, addr, len,
+                                pgoff, flags);
+}
+
+static __init int setup_hugepagesz(char *opt)
+{
+        unsigned long ps = memparse(opt, &opt);
+        if (ps == PMD_SIZE) {
+                hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
+        } else if (ps == PUD_SIZE) {
+                hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
+        } else {
+                pr_err("hugepagesz: Unsupported page size %lu M\n",
+                        ps >> 20);
+                return 0;
+        }
+        return 1;
+}
+__setup("hugepagesz=", setup_hugepagesz);
+
+#endif /*HAVE_ARCH_HUGETLB_UNMAPPED_AREA*/
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
new file mode 100644
index 000000000000..d89c9eacd162
--- /dev/null
+++ b/arch/tile/mm/init.c
@@ -0,0 +1,1085 @@
+/*
+ * Copyright (C) 1995  Linus Torvalds
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/swap.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/poison.h>
+#include <linux/bootmem.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/efi.h>
+#include <linux/memory_hotplug.h>
+#include <linux/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/processor.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/dma.h>
+#include <asm/fixmap.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/homecache.h>
+#include <hv/hypervisor.h>
+#include <arch/chip.h>
+
+#include "migrate.h"
+
+/*
+ * We could set FORCE_MAX_ZONEORDER to "(HPAGE_SHIFT - PAGE_SHIFT + 1)"
+ * in the Tile Kconfig, but this generates configure warnings.
+ * Do it here and force people to get it right to compile this file.
+ * The problem is that with 4KB small pages and 16MB huge pages,
+ * the default value doesn't allow us to group enough small pages
+ * together to make up a huge page.
+ */
+#if CONFIG_FORCE_MAX_ZONEORDER < HPAGE_SHIFT - PAGE_SHIFT + 1
+# error "Change FORCE_MAX_ZONEORDER in arch/tile/Kconfig to match page size"
+#endif
+
+#define clear_pgd(pmdptr) (*(pmdptr) = hv_pte(0))
+
+#ifndef __tilegx__
+unsigned long VMALLOC_RESERVE = CONFIG_VMALLOC_RESERVE;
+#endif
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+/* Create an L2 page table */
+static pte_t * __init alloc_pte(void)
+{
+        return __alloc_bootmem(L2_KERNEL_PGTABLE_SIZE, HV_PAGE_TABLE_ALIGN, 0);
+}
+
+/*
+ * L2 page tables per controller.  We allocate these all at once from
+ * the bootmem allocator and store them here.  This saves on kernel L2
+ * page table memory, compared to allocating a full 64K page per L2
+ * page table, and also means that in cases where we use huge pages,
+ * we are guaranteed to later be able to shatter those huge pages and
+ * switch to using these page tables instead, without requiring
+ * further allocation.  Each l2_ptes[] entry points to the first page
+ * table for the first hugepage-size piece of memory on the
+ * controller; other page tables are just indexed directly, i.e. the
+ * L2 page tables are contiguous in memory for each controller.
+ */
+static pte_t *l2_ptes[MAX_NUMNODES];
+static int num_l2_ptes[MAX_NUMNODES];
+
+static void init_prealloc_ptes(int node, int pages)
+{
+        BUG_ON(pages & (HV_L2_ENTRIES-1));
+        if (pages) {
+                num_l2_ptes[node] = pages;
+                l2_ptes[node] = __alloc_bootmem(pages * sizeof(pte_t),
+                                                HV_PAGE_TABLE_ALIGN, 0);
+        }
+}
+
+pte_t *get_prealloc_pte(unsigned long pfn)
+{
+        int node = pfn_to_nid(pfn);
+        pfn &= ~(-1UL << (NR_PA_HIGHBIT_SHIFT - PAGE_SHIFT));
+        BUG_ON(node >= MAX_NUMNODES);
+        BUG_ON(pfn >= num_l2_ptes[node]);
+        return &l2_ptes[node][pfn];
+}
+
+/*
+ * What caching do we expect pages from the heap to have when
+ * they are allocated during bootup?  (Once we've installed the
+ * "real" swapper_pg_dir.)
+ */
+static int initial_heap_home(void)
+{
+#if CHIP_HAS_CBOX_HOME_MAP()
+        if (hash_default)
+                return PAGE_HOME_HASH;
+#endif
+        return smp_processor_id();
+}
+
+/*
+ * Place a pointer to an L2 page table in a middle page
+ * directory entry.
+ */
+static void __init assign_pte(pmd_t *pmd, pte_t *page_table)
+{
+        phys_addr_t pa = __pa(page_table);
+        unsigned long l2_ptfn = pa >> HV_LOG2_PAGE_TABLE_ALIGN;
+        pte_t pteval = hv_pte_set_ptfn(__pgprot(_PAGE_TABLE), l2_ptfn);
+        BUG_ON((pa & (HV_PAGE_TABLE_ALIGN-1)) != 0);
+        pteval = pte_set_home(pteval, initial_heap_home());
+        *(pte_t *)pmd = pteval;
+        if (page_table != (pte_t *)pmd_page_vaddr(*pmd))
+                BUG();
+}
+
+#ifdef __tilegx__
+
+#if HV_L1_SIZE != HV_L2_SIZE
+# error Rework assumption that L1 and L2 page tables are same size.
+#endif
+
+/* Since pmd_t arrays and pte_t arrays are the same size, just use casts. */
+static inline pmd_t *alloc_pmd(void)
+{
+        return (pmd_t *)alloc_pte();
+}
+
+static inline void assign_pmd(pud_t *pud, pmd_t *pmd)
+{
+        assign_pte((pmd_t *)pud, (pte_t *)pmd);
+}
+
+#endif /* __tilegx__ */
+
+/* Replace the given pmd with a full PTE table. */
+void __init shatter_pmd(pmd_t *pmd)
+{
+        pte_t *pte = get_prealloc_pte(pte_pfn(*(pte_t *)pmd));
+        assign_pte(pmd, pte);
+}
+
+#ifdef CONFIG_HIGHMEM
+/*
+ * This function initializes a certain range of kernel virtual memory
+ * with new bootmem page tables, everywhere page tables are missing in
+ * the given range.
+ */
+
+/*
+ * NOTE: The pagetables are allocated contiguous on the physical space
+ * so we can cache the place of the first one and move around without
+ * checking the pgd every time.
+ */
+static void __init page_table_range_init(unsigned long start,
+                                         unsigned long end, pgd_t *pgd_base)
+{
+        pgd_t *pgd;
+        int pgd_idx;
+        unsigned long vaddr;
+
+        vaddr = start;
+        pgd_idx = pgd_index(vaddr);
+        pgd = pgd_base + pgd_idx;
+
+        for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) {
+                pmd_t *pmd = pmd_offset(pud_offset(pgd, vaddr), vaddr);
+                if (pmd_none(*pmd))
+                        assign_pte(pmd, alloc_pte());
+                vaddr += PMD_SIZE;
+        }
+}
+#endif /* CONFIG_HIGHMEM */
+
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+
+static int __initdata ktext_hash = 1;  /* .text pages */
+static int __initdata kdata_hash = 1;  /* .data and .bss pages */
+int __write_once hash_default = 1;     /* kernel allocator pages */
+EXPORT_SYMBOL(hash_default);
+int __write_once kstack_hash = 1;      /* if no homecaching, use h4h */
+#endif /* CHIP_HAS_CBOX_HOME_MAP */
+
+/*
+ * CPUs to use to for striping the pages of kernel data.  If hash-for-home
+ * is available, this is only relevant if kcache_hash sets up the
+ * .data and .bss to be page-homed, and we don't want the default mode
+ * of using the full set of kernel cpus for the striping.
+ */
+static __initdata struct cpumask kdata_mask;
+static __initdata int kdata_arg_seen;
+
+int __write_once kdata_huge;       /* if no homecaching, small pages */
+
+
+/* Combine a generic pgprot_t with cache home to get a cache-aware pgprot. */
+static pgprot_t __init construct_pgprot(pgprot_t prot, int home)
+{
+        prot = pte_set_home(prot, home);
+#if CHIP_HAS_CBOX_HOME_MAP()
+        if (home == PAGE_HOME_IMMUTABLE) {
+                if (ktext_hash)
+                        prot = hv_pte_set_mode(prot, HV_PTE_MODE_CACHE_HASH_L3);
+                else
+                        prot = hv_pte_set_mode(prot, HV_PTE_MODE_CACHE_NO_L3);
+        }
+#endif
+        return prot;
+}
+
+/*
+ * For a given kernel data VA, how should it be cached?
+ * We return the complete pgprot_t with caching bits set.
+ */
+static pgprot_t __init init_pgprot(ulong address)
+{
+        int cpu;
+        unsigned long page;
+        enum { CODE_DELTA = MEM_SV_INTRPT - PAGE_OFFSET };
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        /* For kdata=huge, everything is just hash-for-home. */
+        if (kdata_huge)
+                return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH);
+#endif
+
+        /* We map the aliased pages of permanent text inaccessible. */
+        if (address < (ulong) _sinittext - CODE_DELTA)
+                return PAGE_NONE;
+
+        /*
+         * We map read-only data non-coherent for performance.  We could
+         * use neighborhood caching on TILE64, but it's not clear it's a win.
+         */
+        if ((address >= (ulong) __start_rodata &&
+             address < (ulong) __end_rodata) ||
+            address == (ulong) empty_zero_page) {
+                return construct_pgprot(PAGE_KERNEL_RO, PAGE_HOME_IMMUTABLE);
+        }
+
+        /* As a performance optimization, keep the boot init stack here. */
+        if (address >= (ulong)&init_thread_union &&
+            address < (ulong)&init_thread_union + THREAD_SIZE)
+                return construct_pgprot(PAGE_KERNEL, smp_processor_id());
+
+#ifndef __tilegx__
+#if !ATOMIC_LOCKS_FOUND_VIA_TABLE()
+        /* Force the atomic_locks[] array page to be hash-for-home. */
+        if (address == (ulong) atomic_locks)
+                return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH);
+#endif
+#endif
+
+        /*
+         * Everything else that isn't data or bss is heap, so mark it
+         * with the initial heap home (hash-for-home, or this cpu).  This
+         * includes any addresses after the loaded image and any address before
+         * _einitdata, since we already captured the case of text before
+         * _sinittext, and __pa(einittext) is approximately __pa(sinitdata).
+         *
+         * All the LOWMEM pages that we mark this way will get their
+         * struct page homecache properly marked later, in set_page_homes().
+         * The HIGHMEM pages we leave with a default zero for their
+         * homes, but with a zero free_time we don't have to actually
+         * do a flush action the first time we use them, either.
+         */
+        if (address >= (ulong) _end || address < (ulong) _einitdata)
+                return construct_pgprot(PAGE_KERNEL, initial_heap_home());
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        /* Use hash-for-home if requested for data/bss. */
+        if (kdata_hash)
+                return construct_pgprot(PAGE_KERNEL, PAGE_HOME_HASH);
+#endif
+
+        /*
+         * Make the w1data homed like heap to start with, to avoid
+         * making it part of the page-striped data area when we're just
+         * going to convert it to read-only soon anyway.
+         */
+        if (address >= (ulong)__w1data_begin && address < (ulong)__w1data_end)
+                return construct_pgprot(PAGE_KERNEL, initial_heap_home());
+
+        /*
+         * Otherwise we just hand out consecutive cpus.  To avoid
+         * requiring this function to hold state, we just walk forward from
+         * _sdata by PAGE_SIZE, skipping the readonly and init data, to reach
+         * the requested address, while walking cpu home around kdata_mask.
+         * This is typically no more than a dozen or so iterations.
+         */
+        page = (((ulong)__w1data_end) + PAGE_SIZE - 1) & PAGE_MASK;
+        BUG_ON(address < page || address >= (ulong)_end);
+        cpu = cpumask_first(&kdata_mask);
+        for (; page < address; page += PAGE_SIZE) {
+                if (page >= (ulong)&init_thread_union &&
+                    page < (ulong)&init_thread_union + THREAD_SIZE)
+                        continue;
+                if (page == (ulong)empty_zero_page)
+                        continue;
+#ifndef __tilegx__
+#if !ATOMIC_LOCKS_FOUND_VIA_TABLE()
+                if (page == (ulong)atomic_locks)
+                        continue;
+#endif
+#endif
+                cpu = cpumask_next(cpu, &kdata_mask);
+                if (cpu == NR_CPUS)
+                        cpu = cpumask_first(&kdata_mask);
+        }
+        return construct_pgprot(PAGE_KERNEL, cpu);
+}
+
+/*
+ * This function sets up how we cache the kernel text.  If we have
+ * hash-for-home support, normally that is used instead (see the
+ * kcache_hash boot flag for more information).  But if we end up
+ * using a page-based caching technique, this option sets up the
+ * details of that.  In addition, the "ktext=nocache" option may
+ * always be used to disable local caching of text pages, if desired.
+ */
+
+static int __initdata ktext_arg_seen;
+static int __initdata ktext_small;
+static int __initdata ktext_local;
+static int __initdata ktext_all;
+static int __initdata ktext_nondataplane;
+static int __initdata ktext_nocache;
+static struct cpumask __initdata ktext_mask;
+
+static int __init setup_ktext(char *str)
+{
+        if (str == NULL)
+                return -EINVAL;
+
+        /* If you have a leading "nocache", turn off ktext caching */
+        if (strncmp(str, "nocache", 7) == 0) {
+                ktext_nocache = 1;
+                pr_info("ktext: disabling local caching of kernel text\n");
+                str += 7;
+                if (*str == ',')
+                        ++str;
+                if (*str == '\0')
+                        return 0;
+        }
+
+        ktext_arg_seen = 1;
+
+        /* Default setting on Tile64: use a huge page */
+        if (strcmp(str, "huge") == 0)
+                pr_info("ktext: using one huge locally cached page\n");
+
+        /* Pay TLB cost but get no cache benefit: cache small pages locally */
+        else if (strcmp(str, "local") == 0) {
+                ktext_small = 1;
+                ktext_local = 1;
+                pr_info("ktext: using small pages with local caching\n");
+        }
+
+        /* Neighborhood cache ktext pages on all cpus. */
+        else if (strcmp(str, "all") == 0) {
+                ktext_small = 1;
+                ktext_all = 1;
+                pr_info("ktext: using maximal caching neighborhood\n");
+        }
+
+
+        /* Neighborhood ktext pages on specified mask */
+        else if (cpulist_parse(str, &ktext_mask) == 0) {
+                char buf[NR_CPUS * 5];
+                cpulist_scnprintf(buf, sizeof(buf), &ktext_mask);
+                if (cpumask_weight(&ktext_mask) > 1) {
+                        ktext_small = 1;
+                        pr_info("ktext: using caching neighborhood %s "
+                               "with small pages\n", buf);
+                } else {
+                        pr_info("ktext: caching on cpu %s with one huge page\n",
+                               buf);
+                }
+        }
+
+        else if (*str)
+                return -EINVAL;
+
+        return 0;
+}
+
+early_param("ktext", setup_ktext);
+
+
+static inline pgprot_t ktext_set_nocache(pgprot_t prot)
+{
+        if (!ktext_nocache)
+                prot = hv_pte_set_nc(prot);
+#if CHIP_HAS_NC_AND_NOALLOC_BITS()
+        else
+                prot = hv_pte_set_no_alloc_l2(prot);
+#endif
+        return prot;
+}
+
+#ifndef __tilegx__
+static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va)
+{
+        return pmd_offset(pud_offset(&pgtables[pgd_index(va)], va), va);
+}
+#else
+static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va)
+{
+        pud_t *pud = pud_offset(&pgtables[pgd_index(va)], va);
+        if (pud_none(*pud))
+                assign_pmd(pud, alloc_pmd());
+        return pmd_offset(pud, va);
+}
+#endif
+
+/* Temporary page table we use for staging. */
+static pgd_t pgtables[PTRS_PER_PGD]
+ __attribute__((section(".init.page")));
+
+/*
+ * This maps the physical memory to kernel virtual address space, a total
+ * of max_low_pfn pages, by creating page tables starting from address
+ * PAGE_OFFSET.
+ *
+ * This routine transitions us from using a set of compiled-in large
+ * pages to using some more precise caching, including removing access
+ * to code pages mapped at PAGE_OFFSET (executed only at MEM_SV_START)
+ * marking read-only data as locally cacheable, striping the remaining
+ * .data and .bss across all the available tiles, and removing access
+ * to pages above the top of RAM (thus ensuring a page fault from a bad
+ * virtual address rather than a hypervisor shoot down for accessing
+ * memory outside the assigned limits).
+ */
+static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
+{
+        unsigned long address, pfn;
+        pmd_t *pmd;
+        pte_t *pte;
+        int pte_ofs;
+        const struct cpumask *my_cpu_mask = cpumask_of(smp_processor_id());
+        struct cpumask kstripe_mask;
+        int rc, i;
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+        if (ktext_arg_seen && ktext_hash) {
+                pr_warning("warning: \"ktext\" boot argument ignored"
+                           " if \"kcache_hash\" sets up text hash-for-home\n");
+                ktext_small = 0;
+        }
+
+        if (kdata_arg_seen && kdata_hash) {
+                pr_warning("warning: \"kdata\" boot argument ignored"
+                           " if \"kcache_hash\" sets up data hash-for-home\n");
+        }
+
+        if (kdata_huge && !hash_default) {
+                pr_warning("warning: disabling \"kdata=huge\"; requires"
+                          " kcache_hash=all or =allbutstack\n");
+                kdata_huge = 0;
+        }
+#endif
+
+        /*
+         * Set up a mask for cpus to use for kernel striping.
+         * This is normally all cpus, but minus dataplane cpus if any.
+         * If the dataplane covers the whole chip, we stripe over
+         * the whole chip too.
+         */
+        cpumask_copy(&kstripe_mask, cpu_possible_mask);
+        if (!kdata_arg_seen)
+                kdata_mask = kstripe_mask;
+
+        /* Allocate and fill in L2 page tables */
+        for (i = 0; i < MAX_NUMNODES; ++i) {
+#ifdef CONFIG_HIGHMEM
+                unsigned long end_pfn = node_lowmem_end_pfn[i];
+#else
+                unsigned long end_pfn = node_end_pfn[i];
+#endif
+                unsigned long end_huge_pfn = 0;
+
+                /* Pre-shatter the last huge page to allow per-cpu pages. */
+                if (kdata_huge)
+                        end_huge_pfn = end_pfn - (HPAGE_SIZE >> PAGE_SHIFT);
+
+                pfn = node_start_pfn[i];
+
+                /* Allocate enough memory to hold L2 page tables for node. */
+                init_prealloc_ptes(i, end_pfn - pfn);
+
+                address = (unsigned long) pfn_to_kaddr(pfn);
+                while (pfn < end_pfn) {
+                        BUG_ON(address & (HPAGE_SIZE-1));
+                        pmd = get_pmd(pgtables, address);
+                        pte = get_prealloc_pte(pfn);
+                        if (pfn < end_huge_pfn) {
+                                pgprot_t prot = init_pgprot(address);
+                                *(pte_t *)pmd = pte_mkhuge(pfn_pte(pfn, prot));
+                                for (pte_ofs = 0; pte_ofs < PTRS_PER_PTE;
+                                     pfn++, pte_ofs++, address += PAGE_SIZE)
+                                        pte[pte_ofs] = pfn_pte(pfn, prot);
+                        } else {
+                                if (kdata_huge)
+                                        printk(KERN_DEBUG "pre-shattered huge"
+                                               " page at %#lx\n", address);
+                                for (pte_ofs = 0; pte_ofs < PTRS_PER_PTE;
+                                     pfn++, pte_ofs++, address += PAGE_SIZE) {
+                                        pgprot_t prot = init_pgprot(address);
+                                        pte[pte_ofs] = pfn_pte(pfn, prot);
+                                }
+                                assign_pte(pmd, pte);
+                        }
+                }
+        }
+
+        /*
+         * Set or check ktext_map now that we have cpu_possible_mask
+         * and kstripe_mask to work with.
+         */
+        if (ktext_all)
+                cpumask_copy(&ktext_mask, cpu_possible_mask);
+        else if (ktext_nondataplane)
+                ktext_mask = kstripe_mask;
+        else if (!cpumask_empty(&ktext_mask)) {
+                /* Sanity-check any mask that was requested */
+                struct cpumask bad;
+                cpumask_andnot(&bad, &ktext_mask, cpu_possible_mask);
+                cpumask_and(&ktext_mask, &ktext_mask, cpu_possible_mask);
+                if (!cpumask_empty(&bad)) {
+                        char buf[NR_CPUS * 5];
+                        cpulist_scnprintf(buf, sizeof(buf), &bad);
+                        pr_info("ktext: not using unavailable cpus %s\n", buf);
+                }
+                if (cpumask_empty(&ktext_mask)) {
+                        pr_warning("ktext: no valid cpus; caching on %d.\n",
+                                   smp_processor_id());
+                        cpumask_copy(&ktext_mask,
+                                     cpumask_of(smp_processor_id()));
+                }
+        }
+
+        address = MEM_SV_INTRPT;
+        pmd = get_pmd(pgtables, address);
+        if (ktext_small) {
+                /* Allocate an L2 PTE for the kernel text */
+                int cpu = 0;
+                pgprot_t prot = construct_pgprot(PAGE_KERNEL_EXEC,
+                                                 PAGE_HOME_IMMUTABLE);
+
+                if (ktext_local) {
+                        if (ktext_nocache)
+                                prot = hv_pte_set_mode(prot,
+                                                       HV_PTE_MODE_UNCACHED);
+                        else
+                                prot = hv_pte_set_mode(prot,
+                                                       HV_PTE_MODE_CACHE_NO_L3);
+                } else {
+                        prot = hv_pte_set_mode(prot,
+                                               HV_PTE_MODE_CACHE_TILE_L3);
+                        cpu = cpumask_first(&ktext_mask);
+
+                        prot = ktext_set_nocache(prot);
+                }
+
+                BUG_ON(address != (unsigned long)_stext);
+                pfn = 0;  /* code starts at PA 0 */
+                pte = alloc_pte();
+                for (pte_ofs = 0; address < (unsigned long)_einittext;
+                     pfn++, pte_ofs++, address += PAGE_SIZE) {
+                        if (!ktext_local) {
+                                prot = set_remote_cache_cpu(prot, cpu);
+                                cpu = cpumask_next(cpu, &ktext_mask);
+                                if (cpu == NR_CPUS)
+                                        cpu = cpumask_first(&ktext_mask);
+                        }
+                        pte[pte_ofs] = pfn_pte(pfn, prot);
+                }
+                assign_pte(pmd, pte);
+        } else {
+                pte_t pteval = pfn_pte(0, PAGE_KERNEL_EXEC);
+                pteval = pte_mkhuge(pteval);
+#if CHIP_HAS_CBOX_HOME_MAP()
+                if (ktext_hash) {
+                        pteval = hv_pte_set_mode(pteval,
+                                                 HV_PTE_MODE_CACHE_HASH_L3);
+                        pteval = ktext_set_nocache(pteval);
+                } else
+#endif /* CHIP_HAS_CBOX_HOME_MAP() */
+                if (cpumask_weight(&ktext_mask) == 1) {
+                        pteval = set_remote_cache_cpu(pteval,
+                                              cpumask_first(&ktext_mask));
+                        pteval = hv_pte_set_mode(pteval,
+                                                 HV_PTE_MODE_CACHE_TILE_L3);
+                        pteval = ktext_set_nocache(pteval);
+                } else if (ktext_nocache)
+                        pteval = hv_pte_set_mode(pteval,
+                                                 HV_PTE_MODE_UNCACHED);
+                else
+                        pteval = hv_pte_set_mode(pteval,
+                                                 HV_PTE_MODE_CACHE_NO_L3);
+                *(pte_t *)pmd = pteval;
+        }
+
+        /* Set swapper_pgprot here so it is flushed to memory right away. */
+        swapper_pgprot = init_pgprot((unsigned long)swapper_pg_dir);
+
+        /*
+         * Since we may be changing the caching of the stack and page
+         * table itself, we invoke an assembly helper to do the
+         * following steps:
+         *
+         *  - flush the cache so we start with an empty slate
+         *  - install pgtables[] as the real page table
+         *  - flush the TLB so the new page table takes effect
+         */
+        rc = flush_and_install_context(__pa(pgtables),
+                                       init_pgprot((unsigned long)pgtables),
+                                       __get_cpu_var(current_asid),
+                                       cpumask_bits(my_cpu_mask));
+        BUG_ON(rc != 0);
+
+        /* Copy the page table back to the normal swapper_pg_dir. */
+        memcpy(pgd_base, pgtables, sizeof(pgtables));
+        __install_page_table(pgd_base, __get_cpu_var(current_asid),
+                             swapper_pgprot);
+}
+
+/*
+ * devmem_is_allowed() checks to see if /dev/mem access to a certain address
+ * is valid. The argument is a physical page number.
+ *
+ * On Tile, the only valid things for which we can just hand out unchecked
+ * PTEs are the kernel code and data.  Anything else might change its
+ * homing with time, and we wouldn't know to adjust the /dev/mem PTEs.
+ * Note that init_thread_union is released to heap soon after boot,
+ * so we include it in the init data.
+ *
+ * For TILE-Gx, we might want to consider allowing access to PA
+ * regions corresponding to PCI space, etc.
+ */
+int devmem_is_allowed(unsigned long pagenr)
+{
+        return pagenr < kaddr_to_pfn(_end) &&
+                !(pagenr >= kaddr_to_pfn(&init_thread_union) ||
+                  pagenr < kaddr_to_pfn(_einitdata)) &&
+                !(pagenr >= kaddr_to_pfn(_sinittext) ||
+                  pagenr <= kaddr_to_pfn(_einittext-1));
+}
+
+#ifdef CONFIG_HIGHMEM
+static void __init permanent_kmaps_init(pgd_t *pgd_base)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pmd_t *pmd;
+        pte_t *pte;
+        unsigned long vaddr;
+
+        vaddr = PKMAP_BASE;
+        page_table_range_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
+
+        pgd = swapper_pg_dir + pgd_index(vaddr);
+        pud = pud_offset(pgd, vaddr);
+        pmd = pmd_offset(pud, vaddr);
+        pte = pte_offset_kernel(pmd, vaddr);
+        pkmap_page_table = pte;
+}
+#endif /* CONFIG_HIGHMEM */
+
+
+static void __init init_free_pfn_range(unsigned long start, unsigned long end)
+{
+        unsigned long pfn;
+        struct page *page = pfn_to_page(start);
+
+        for (pfn = start; pfn < end; ) {
+                /* Optimize by freeing pages in large batches */
+                int order = __ffs(pfn);
+                int count, i;
+                struct page *p;
+
+                if (order >= MAX_ORDER)
+                        order = MAX_ORDER-1;
+                count = 1 << order;
+                while (pfn + count > end) {
+                        count >>= 1;
+                        --order;
+                }
+                for (p = page, i = 0; i < count; ++i, ++p) {
+                        __ClearPageReserved(p);
+                        /*
+                         * Hacky direct set to avoid unnecessary
+                         * lock take/release for EVERY page here.
+                         */
+                        p->_count.counter = 0;
+                        p->_mapcount.counter = -1;
+                }
+                init_page_count(page);
+                __free_pages(page, order);
+                totalram_pages += count;
+
+                page += count;
+                pfn += count;
+        }
+}
+
+static void __init set_non_bootmem_pages_init(void)
+{
+        struct zone *z;
+        for_each_zone(z) {
+                unsigned long start, end;
+                int nid = z->zone_pgdat->node_id;
+                int idx = zone_idx(z);
+
+                start = z->zone_start_pfn;
+                if (start == 0)
+                        continue;  /* bootmem */
+                end = start + z->spanned_pages;
+                if (idx == ZONE_NORMAL) {
+                        BUG_ON(start != node_start_pfn[nid]);
+                        start = node_free_pfn[nid];
+                }
+#ifdef CONFIG_HIGHMEM
+                if (idx == ZONE_HIGHMEM)
+                        totalhigh_pages += z->spanned_pages;
+#endif
+                if (kdata_huge) {
+                        unsigned long percpu_pfn = node_percpu_pfn[nid];
+                        if (start < percpu_pfn && end > percpu_pfn)
+                                end = percpu_pfn;
+                }
+#ifdef CONFIG_PCI
+                if (start <= pci_reserve_start_pfn &&
+                    end > pci_reserve_start_pfn) {
+                        if (end > pci_reserve_end_pfn)
+                                init_free_pfn_range(pci_reserve_end_pfn, end);
+                        end = pci_reserve_start_pfn;
+                }
+#endif
+                init_free_pfn_range(start, end);
+        }
+}
+
+/*
+ * paging_init() sets up the page tables - note that all of lowmem is
+ * already mapped by head.S.
+ */
+void __init paging_init(void)
+{
+#ifdef CONFIG_HIGHMEM
+        unsigned long vaddr, end;
+#endif
+#ifdef __tilegx__
+        pud_t *pud;
+#endif
+        pgd_t *pgd_base = swapper_pg_dir;
+
+        kernel_physical_mapping_init(pgd_base);
+
+#ifdef CONFIG_HIGHMEM
+        /*
+         * Fixed mappings, only the page table structure has to be
+         * created - mappings will be set by set_fixmap():
+         */
+        vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+        end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
+        page_table_range_init(vaddr, end, pgd_base);
+        permanent_kmaps_init(pgd_base);
+#endif
+
+#ifdef __tilegx__
+        /*
+         * Since GX allocates just one pmd_t array worth of vmalloc space,
+         * we go ahead and allocate it statically here, then share it
+         * globally.  As a result we don't have to worry about any task
+         * changing init_mm once we get up and running, and there's no
+         * need for e.g. vmalloc_sync_all().
+         */
+        BUILD_BUG_ON(pgd_index(VMALLOC_START) != pgd_index(VMALLOC_END));
+        pud = pud_offset(pgd_base + pgd_index(VMALLOC_START), VMALLOC_START);
+        assign_pmd(pud, alloc_pmd());
+#endif
+}
+
+
+/*
+ * Walk the kernel page tables and derive the page_home() from
+ * the PTEs, so that set_pte() can properly validate the caching
+ * of all PTEs it sees.
+ */
+void __init set_page_homes(void)
+{
+}
+
+static void __init set_max_mapnr_init(void)
+{
+#ifdef CONFIG_FLATMEM
+        max_mapnr = max_low_pfn;
+#endif
+}
+
+void __init mem_init(void)
+{
+        int codesize, datasize, initsize;
+        int i;
+#ifndef __tilegx__
+        void *last;
+#endif
+
+#ifdef CONFIG_FLATMEM
+        if (!mem_map)
+                BUG();
+#endif
+
+#ifdef CONFIG_HIGHMEM
+        /* check that fixmap and pkmap do not overlap */
+        if (PKMAP_ADDR(LAST_PKMAP-1) >= FIXADDR_START) {
+                pr_err("fixmap and kmap areas overlap"
+                       " - this will crash\n");
+                pr_err("pkstart: %lxh pkend: %lxh fixstart %lxh\n",
+                       PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP-1),
+                       FIXADDR_START);
+                BUG();
+        }
+#endif
+
+        set_max_mapnr_init();
+
+        /* this will put all bootmem onto the freelists */
+        totalram_pages += free_all_bootmem();
+
+        /* count all remaining LOWMEM and give all HIGHMEM to page allocator */
+        set_non_bootmem_pages_init();
+
+        codesize =  (unsigned long)&_etext - (unsigned long)&_text;
+        datasize =  (unsigned long)&_end - (unsigned long)&_sdata;
+        initsize =  (unsigned long)&_einittext - (unsigned long)&_sinittext;
+        initsize += (unsigned long)&_einitdata - (unsigned long)&_sinitdata;
+
+        pr_info("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init, %ldk highmem)\n",
+                (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+                num_physpages << (PAGE_SHIFT-10),
+                codesize >> 10,
+                datasize >> 10,
+                initsize >> 10,
+                (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
+               );
+
+        /*
+         * In debug mode, dump some interesting memory mappings.
+         */
+#ifdef CONFIG_HIGHMEM
+        printk(KERN_DEBUG "  KMAP    %#lx - %#lx\n",
+               FIXADDR_START, FIXADDR_TOP + PAGE_SIZE - 1);
+        printk(KERN_DEBUG "  PKMAP   %#lx - %#lx\n",
+               PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP) - 1);
+#endif
+#ifdef CONFIG_HUGEVMAP
+        printk(KERN_DEBUG "  HUGEMAP %#lx - %#lx\n",
+               HUGE_VMAP_BASE, HUGE_VMAP_END - 1);
+#endif
+        printk(KERN_DEBUG "  VMALLOC %#lx - %#lx\n",
+               _VMALLOC_START, _VMALLOC_END - 1);
+#ifdef __tilegx__
+        for (i = MAX_NUMNODES-1; i >= 0; --i) {
+                struct pglist_data *node = &node_data[i];
+                if (node->node_present_pages) {
+                        unsigned long start = (unsigned long)
+                                pfn_to_kaddr(node->node_start_pfn);
+                        unsigned long end = start +
+                                (node->node_present_pages << PAGE_SHIFT);
+                        printk(KERN_DEBUG "  MEM%d    %#lx - %#lx\n",
+                               i, start, end - 1);
+                }
+        }
+#else
+        last = high_memory;
+        for (i = MAX_NUMNODES-1; i >= 0; --i) {
+                if ((unsigned long)vbase_map[i] != -1UL) {
+                        printk(KERN_DEBUG "  LOWMEM%d %#lx - %#lx\n",
+                               i, (unsigned long) (vbase_map[i]),
+                               (unsigned long) (last-1));
+                        last = vbase_map[i];
+                }
+        }
+#endif
+
+#ifndef __tilegx__
+        /*
+         * Convert from using one lock for all atomic operations to
+         * one per cpu.
+         */
+        __init_atomic_per_cpu();
+#endif
+}
+
+/*
+ * this is for the non-NUMA, single node SMP system case.
+ * Specifically, in the case of x86, we will always add
+ * memory to the highmem for now.
+ */
+#ifndef CONFIG_NEED_MULTIPLE_NODES
+int arch_add_memory(u64 start, u64 size)
+{
+        struct pglist_data *pgdata = &contig_page_data;
+        struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
+        unsigned long start_pfn = start >> PAGE_SHIFT;
+        unsigned long nr_pages = size >> PAGE_SHIFT;
+
+        return __add_pages(zone, start_pfn, nr_pages);
+}
+
+int remove_memory(u64 start, u64 size)
+{
+        return -EINVAL;
+}
+#endif
+
+struct kmem_cache *pgd_cache;
+
+void __init pgtable_cache_init(void)
+{
+        pgd_cache = kmem_cache_create("pgd",
+                                PTRS_PER_PGD*sizeof(pgd_t),
+                                PTRS_PER_PGD*sizeof(pgd_t),
+                                0,
+                                NULL);
+        if (!pgd_cache)
+                panic("pgtable_cache_init(): Cannot create pgd cache");
+}
+
+#if !CHIP_HAS_COHERENT_LOCAL_CACHE()
+/*
+ * The __w1data area holds data that is only written during initialization,
+ * and is read-only and thus freely cacheable thereafter.  Fix the page
+ * table entries that cover that region accordingly.
+ */
+static void mark_w1data_ro(void)
+{
+        /* Loop over page table entries */
+        unsigned long addr = (unsigned long)__w1data_begin;
+        BUG_ON((addr & (PAGE_SIZE-1)) != 0);
+        for (; addr <= (unsigned long)__w1data_end - 1; addr += PAGE_SIZE) {
+                unsigned long pfn = kaddr_to_pfn((void *)addr);
+                pte_t *ptep = virt_to_pte(NULL, addr);
+                BUG_ON(pte_huge(*ptep));   /* not relevant for kdata_huge */
+                set_pte_at(&init_mm, addr, ptep, pfn_pte(pfn, PAGE_KERNEL_RO));
+        }
+}
+#endif
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+static long __write_once initfree;
+#else
+static long __write_once initfree = 1;
+#endif
+
+/* Select whether to free (1) or mark unusable (0) the __init pages. */
+static int __init set_initfree(char *str)
+{
+        strict_strtol(str, 0, &initfree);
+        pr_info("initfree: %s free init pages\n", initfree ? "will" : "won't");
+        return 1;
+}
+__setup("initfree=", set_initfree);
+
+static void free_init_pages(char *what, unsigned long begin, unsigned long end)
+{
+        unsigned long addr = (unsigned long) begin;
+
+        if (kdata_huge && !initfree) {
+                pr_warning("Warning: ignoring initfree=0:"
+                           " incompatible with kdata=huge\n");
+                initfree = 1;
+        }
+        end = (end + PAGE_SIZE - 1) & PAGE_MASK;
+        local_flush_tlb_pages(NULL, begin, PAGE_SIZE, end - begin);
+        for (addr = begin; addr < end; addr += PAGE_SIZE) {
+                /*
+                 * Note we just reset the home here directly in the
+                 * page table.  We know this is safe because our caller
+                 * just flushed the caches on all the other cpus,
+                 * and they won't be touching any of these pages.
+                 */
+                int pfn = kaddr_to_pfn((void *)addr);
+                struct page *page = pfn_to_page(pfn);
+                pte_t *ptep = virt_to_pte(NULL, addr);
+                if (!initfree) {
+                        /*
+                         * If debugging page accesses then do not free
+                         * this memory but mark them not present - any
+                         * buggy init-section access will create a
+                         * kernel page fault:
+                         */
+                        pte_clear(&init_mm, addr, ptep);
+                        continue;
+                }
+                __ClearPageReserved(page);
+                init_page_count(page);
+                if (pte_huge(*ptep))
+                        BUG_ON(!kdata_huge);
+                else
+                        set_pte_at(&init_mm, addr, ptep,
+                                   pfn_pte(pfn, PAGE_KERNEL));
+                memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
+                free_page(addr);
+                totalram_pages++;
+        }
+        pr_info("Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+}
+
+void free_initmem(void)
+{
+        const unsigned long text_delta = MEM_SV_INTRPT - PAGE_OFFSET;
+
+        /*
+         * Evict the dirty initdata on the boot cpu, evict the w1data
+         * wherever it's homed, and evict all the init code everywhere.
+         * We are guaranteed that no one will touch the init pages any
+         * more, and although other cpus may be touching the w1data,
+         * we only actually change the caching on tile64, which won't
+         * be keeping local copies in the other tiles' caches anyway.
+         */
+        homecache_evict(&cpu_cacheable_map);
+
+        /* Free the data pages that we won't use again after init. */
+        free_init_pages("unused kernel data",
+                        (unsigned long)_sinitdata,
+                        (unsigned long)_einitdata);
+
+        /*
+         * Free the pages mapped from 0xc0000000 that correspond to code
+         * pages from 0xfd000000 that we won't use again after init.
+         */
+        free_init_pages("unused kernel text",
+                        (unsigned long)_sinittext - text_delta,
+                        (unsigned long)_einittext - text_delta);
+
+#if !CHIP_HAS_COHERENT_LOCAL_CACHE()
+        /*
+         * Upgrade the .w1data section to globally cached.
+         * We don't do this on tilepro, since the cache architecture
+         * pretty much makes it irrelevant, and in any case we end
+         * up having racing issues with other tiles that may touch
+         * the data after we flush the cache but before we update
+         * the PTEs and flush the TLBs, causing sharer shootdowns
+         * later.  Even though this is to clean data, it seems like
+         * an unnecessary complication.
+         */
+        mark_w1data_ro();
+#endif
+
+        /* Do a global TLB flush so everyone sees the changes. */
+        flush_tlb_all();
+}
diff --git a/arch/tile/mm/migrate.h b/arch/tile/mm/migrate.h
new file mode 100644
index 000000000000..cd45a0837fa6
--- /dev/null
+++ b/arch/tile/mm/migrate.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Structure definitions for migration, exposed here for use by
+ * arch/tile/kernel/asm-offsets.c.
+ */
+
+#ifndef MM_MIGRATE_H
+#define MM_MIGRATE_H
+
+#include <linux/cpumask.h>
+#include <hv/hypervisor.h>
+
+/*
+ * This function is used as a helper when setting up the initial
+ * page table (swapper_pg_dir).
+ */
+extern int flush_and_install_context(HV_PhysAddr page_table, HV_PTE access,
+                                     HV_ASID asid,
+                                     const unsigned long *cpumask);
+
+/*
+ * This function supports migration as a "helper" as follows:
+ *
+ *  - Set the stack PTE itself to "migrating".
+ *  - Do a global TLB flush for (va,length) and the specified ASIDs.
+ *  - Do a cache-evict on all necessary cpus.
+ *  - Write the new stack PTE.
+ *
+ * Note that any non-NULL pointers must not point to the page that
+ * is handled by the stack_pte itself.
+ */
+extern int homecache_migrate_stack_and_flush(pte_t stack_pte, unsigned long va,
+                                     size_t length, pte_t *stack_ptep,
+                                     const struct cpumask *cache_cpumask,
+                                     const struct cpumask *tlb_cpumask,
+                                     HV_Remote_ASID *asids,
+                                     int asidcount);
+
+#endif /* MM_MIGRATE_H */
diff --git a/arch/tile/mm/migrate_32.S b/arch/tile/mm/migrate_32.S
new file mode 100644
index 000000000000..f738765cd1e6
--- /dev/null
+++ b/arch/tile/mm/migrate_32.S
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * This routine is a helper for migrating the home of a set of pages to
+ * a new cpu.  See the documentation in homecache.c for more information.
+ */
+
+#include <linux/linkage.h>
+#include <linux/threads.h>
+#include <asm/page.h>
+#include <asm/types.h>
+#include <asm/asm-offsets.h>
+#include <hv/hypervisor.h>
+
+        .text
+
+/*
+ * First, some definitions that apply to all the code in the file.
+ */
+
+/* Locals (caller-save) */
+#define r_tmp           r10
+#define r_save_sp       r11
+
+/* What we save where in the stack frame; must include all callee-saves. */
+#define FRAME_SP        4
+#define FRAME_R30       8
+#define FRAME_R31       12
+#define FRAME_R32       16
+#define FRAME_R33       20
+#define FRAME_R34       24
+#define FRAME_R35       28
+#define FRAME_SIZE      32
+
+
+
+
+/*
+ * On entry:
+ *
+ *   r0 low word of the new context PA to install (moved to r_context_lo)
+ *   r1 high word of the new context PA to install (moved to r_context_hi)
+ *   r2 low word of PTE to use for context access (moved to r_access_lo)
+ *   r3 high word of PTE to use for context access (moved to r_access_lo)
+ *   r4 ASID to use for new context (moved to r_asid)
+ *   r5 pointer to cpumask with just this cpu set in it (r_my_cpumask)
+ */
+
+/* Arguments (caller-save) */
+#define r_context_lo_in r0
+#define r_context_hi_in r1
+#define r_access_lo_in  r2
+#define r_access_hi_in  r3
+#define r_asid_in       r4
+#define r_my_cpumask    r5
+
+/* Locals (callee-save); must not be more than FRAME_xxx above. */
+#define r_save_ics      r30
+#define r_context_lo    r31
+#define r_context_hi    r32
+#define r_access_lo     r33
+#define r_access_hi     r34
+#define r_asid          r35
+
+STD_ENTRY(flush_and_install_context)
+        /*
+         * Create a stack frame; we can't touch it once we flush the
+         * cache until we install the new page table and flush the TLB.
+         */
+        {
+         move r_save_sp, sp
+         sw sp, lr
+         addi sp, sp, -FRAME_SIZE
+        }
+        addi r_tmp, sp, FRAME_SP
+        {
+         sw r_tmp, r_save_sp
+         addi r_tmp, sp, FRAME_R30
+        }
+        {
+         sw r_tmp, r30
+         addi r_tmp, sp, FRAME_R31
+        }
+        {
+         sw r_tmp, r31
+         addi r_tmp, sp, FRAME_R32
+        }
+        {
+         sw r_tmp, r32
+         addi r_tmp, sp, FRAME_R33
+        }
+        {
+         sw r_tmp, r33
+         addi r_tmp, sp, FRAME_R34
+        }
+        {
+         sw r_tmp, r34
+         addi r_tmp, sp, FRAME_R35
+        }
+        sw r_tmp, r35
+
+        /* Move some arguments to callee-save registers. */
+        {
+         move r_context_lo, r_context_lo_in
+         move r_context_hi, r_context_hi_in
+        }
+        {
+         move r_access_lo, r_access_lo_in
+         move r_access_hi, r_access_hi_in
+        }
+        move r_asid, r_asid_in
+
+        /* Disable interrupts, since we can't use our stack. */
+        {
+         mfspr r_save_ics, INTERRUPT_CRITICAL_SECTION
+         movei r_tmp, 1
+        }
+        mtspr INTERRUPT_CRITICAL_SECTION, r_tmp
+
+        /* First, flush our L2 cache. */
+        {
+         move r0, zero  /* cache_pa */
+         move r1, zero
+        }
+        {
+         auli r2, zero, ha16(HV_FLUSH_EVICT_L2)  /* cache_control */
+         move r3, r_my_cpumask  /* cache_cpumask */
+        }
+        {
+         move r4, zero  /* tlb_va */
+         move r5, zero  /* tlb_length */
+        }
+        {
+         move r6, zero  /* tlb_pgsize */
+         move r7, zero  /* tlb_cpumask */
+        }
+        {
+         move r8, zero  /* asids */
+         move r9, zero  /* asidcount */
+        }
+        jal hv_flush_remote
+        bnz r0, .Ldone
+
+        /* Now install the new page table. */
+        {
+         move r0, r_context_lo
+         move r1, r_context_hi
+        }
+        {
+         move r2, r_access_lo
+         move r3, r_access_hi
+        }
+        {
+         move r4, r_asid
+         movei r5, HV_CTX_DIRECTIO
+        }
+        jal hv_install_context
+        bnz r0, .Ldone
+
+        /* Finally, flush the TLB. */
+        {
+         movei r0, 0   /* preserve_global */
+         jal hv_flush_all
+        }
+
+.Ldone:
+        /* Reset interrupts back how they were before. */
+        mtspr INTERRUPT_CRITICAL_SECTION, r_save_ics
+
+        /* Restore the callee-saved registers and return. */
+        addli lr, sp, FRAME_SIZE
+        {
+         lw lr, lr
+         addli r_tmp, sp, FRAME_R30
+        }
+        {
+         lw r30, r_tmp
+         addli r_tmp, sp, FRAME_R31
+        }
+        {
+         lw r31, r_tmp
+         addli r_tmp, sp, FRAME_R32
+        }
+        {
+         lw r32, r_tmp
+         addli r_tmp, sp, FRAME_R33
+        }
+        {
+         lw r33, r_tmp
+         addli r_tmp, sp, FRAME_R34
+        }
+        {
+         lw r34, r_tmp
+         addli r_tmp, sp, FRAME_R35
+        }
+        {
+         lw r35, r_tmp
+         addi sp, sp, FRAME_SIZE
+        }
+        jrp lr
+        STD_ENDPROC(flush_and_install_context)
diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c
new file mode 100644
index 000000000000..f96f4cec602a
--- /dev/null
+++ b/arch/tile/mm/mmap.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Taken from the i386 architecture and simplified.
+ */
+
+#include <linux/mm.h>
+#include <linux/random.h>
+#include <linux/limits.h>
+#include <linux/sched.h>
+#include <linux/mman.h>
+#include <linux/compat.h>
+
+/*
+ * Top of mmap area (just below the process stack).
+ *
+ * Leave an at least ~128 MB hole.
+ */
+#define MIN_GAP (128*1024*1024)
+#define MAX_GAP (TASK_SIZE/6*5)
+
+static inline unsigned long mmap_base(struct mm_struct *mm)
+{
+        unsigned long gap = rlimit(RLIMIT_STACK);
+        unsigned long random_factor = 0;
+
+        if (current->flags & PF_RANDOMIZE)
+                random_factor = get_random_int() % (1024*1024);
+
+        if (gap < MIN_GAP)
+                gap = MIN_GAP;
+        else if (gap > MAX_GAP)
+                gap = MAX_GAP;
+
+        return PAGE_ALIGN(TASK_SIZE - gap - random_factor);
+}
+
+/*
+ * This function, called very early during the creation of a new
+ * process VM image, sets up which VM layout function to use:
+ */
+void arch_pick_mmap_layout(struct mm_struct *mm)
+{
+#if !defined(__tilegx__)
+        int is_32bit = 1;
+#elif defined(CONFIG_COMPAT)
+        int is_32bit = is_compat_task();
+#else
+        int is_32bit = 0;
+#endif
+
+        /*
+         * Use standard layout if the expected stack growth is unlimited
+         * or we are running native 64 bits.
+         */
+        if (!is_32bit || rlimit(RLIMIT_STACK) == RLIM_INFINITY) {
+                mm->mmap_base = TASK_UNMAPPED_BASE;
+                mm->get_unmapped_area = arch_get_unmapped_area;
+                mm->unmap_area = arch_unmap_area;
+        } else {
+                mm->mmap_base = mmap_base(mm);
+                mm->get_unmapped_area = arch_get_unmapped_area_topdown;
+                mm->unmap_area = arch_unmap_area_topdown;
+        }
+}
diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c
new file mode 100644
index 000000000000..335c24621c41
--- /dev/null
+++ b/arch/tile/mm/pgtable.c
@@ -0,0 +1,529 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/spinlock.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+#include <linux/smp.h>
+
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/fixmap.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/homecache.h>
+
+#define K(x) ((x) << (PAGE_SHIFT-10))
+
+/*
+ * The normal show_free_areas() is too verbose on Tile, with dozens
+ * of processors and often four NUMA zones each with high and lowmem.
+ */
+void show_mem(void)
+{
+        struct zone *zone;
+
+        pr_err("Active:%lu inactive:%lu dirty:%lu writeback:%lu unstable:%lu"
+               " free:%lu\n slab:%lu mapped:%lu pagetables:%lu bounce:%lu"
+               " pagecache:%lu swap:%lu\n",
+               (global_page_state(NR_ACTIVE_ANON) +
+                global_page_state(NR_ACTIVE_FILE)),
+               (global_page_state(NR_INACTIVE_ANON) +
+                global_page_state(NR_INACTIVE_FILE)),
+               global_page_state(NR_FILE_DIRTY),
+               global_page_state(NR_WRITEBACK),
+               global_page_state(NR_UNSTABLE_NFS),
+               global_page_state(NR_FREE_PAGES),
+               (global_page_state(NR_SLAB_RECLAIMABLE) +
+                global_page_state(NR_SLAB_UNRECLAIMABLE)),
+               global_page_state(NR_FILE_MAPPED),
+               global_page_state(NR_PAGETABLE),
+               global_page_state(NR_BOUNCE),
+               global_page_state(NR_FILE_PAGES),
+               nr_swap_pages);
+
+        for_each_zone(zone) {
+                unsigned long flags, order, total = 0, largest_order = -1;
+
+                if (!populated_zone(zone))
+                        continue;
+
+                spin_lock_irqsave(&zone->lock, flags);
+                for (order = 0; order < MAX_ORDER; order++) {
+                        int nr = zone->free_area[order].nr_free;
+                        total += nr << order;
+                        if (nr)
+                                largest_order = order;
+                }
+                spin_unlock_irqrestore(&zone->lock, flags);
+                pr_err("Node %d %7s: %lukB (largest %luKb)\n",
+                       zone_to_nid(zone), zone->name,
+                       K(total), largest_order ? K(1UL) << largest_order : 0);
+        }
+}
+
+/*
+ * Associate a virtual page frame with a given physical page frame
+ * and protection flags for that frame.
+ */
+static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pmd_t *pmd;
+        pte_t *pte;
+
+        pgd = swapper_pg_dir + pgd_index(vaddr);
+        if (pgd_none(*pgd)) {
+                BUG();
+                return;
+        }
+        pud = pud_offset(pgd, vaddr);
+        if (pud_none(*pud)) {
+                BUG();
+                return;
+        }
+        pmd = pmd_offset(pud, vaddr);
+        if (pmd_none(*pmd)) {
+                BUG();
+                return;
+        }
+        pte = pte_offset_kernel(pmd, vaddr);
+        /* <pfn,flags> stored as-is, to permit clearing entries */
+        set_pte(pte, pfn_pte(pfn, flags));
+
+        /*
+         * It's enough to flush this one mapping.
+         * This appears conservative since it is only called
+         * from __set_fixmap.
+         */
+        local_flush_tlb_page(NULL, vaddr, PAGE_SIZE);
+}
+
+void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
+{
+        unsigned long address = __fix_to_virt(idx);
+
+        if (idx >= __end_of_fixed_addresses) {
+                BUG();
+                return;
+        }
+        set_pte_pfn(address, phys >> PAGE_SHIFT, flags);
+}
+
+#if defined(CONFIG_HIGHPTE)
+pte_t *_pte_offset_map(pmd_t *dir, unsigned long address, enum km_type type)
+{
+        pte_t *pte = kmap_atomic(pmd_page(*dir), type) +
+                (pmd_ptfn(*dir) << HV_LOG2_PAGE_TABLE_ALIGN) & ~PAGE_MASK;
+        return &pte[pte_index(address)];
+}
+#endif
+
+/*
+ * List of all pgd's needed so it can invalidate entries in both cached
+ * and uncached pgd's. This is essentially codepath-based locking
+ * against pageattr.c; it is the unique case in which a valid change
+ * of kernel pagetables can't be lazily synchronized by vmalloc faults.
+ * vmalloc faults work because attached pagetables are never freed.
+ * The locking scheme was chosen on the basis of manfred's
+ * recommendations and having no core impact whatsoever.
+ * -- wli
+ */
+DEFINE_SPINLOCK(pgd_lock);
+LIST_HEAD(pgd_list);
+
+static inline void pgd_list_add(pgd_t *pgd)
+{
+        list_add(pgd_to_list(pgd), &pgd_list);
+}
+
+static inline void pgd_list_del(pgd_t *pgd)
+{
+        list_del(pgd_to_list(pgd));
+}
+
+#define KERNEL_PGD_INDEX_START pgd_index(PAGE_OFFSET)
+#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_INDEX_START)
+
+static void pgd_ctor(pgd_t *pgd)
+{
+        unsigned long flags;
+
+        memset(pgd, 0, KERNEL_PGD_INDEX_START*sizeof(pgd_t));
+        spin_lock_irqsave(&pgd_lock, flags);
+
+#ifndef __tilegx__
+        /*
+         * Check that the user interrupt vector has no L2.
+         * It never should for the swapper, and new page tables
+         * should always start with an empty user interrupt vector.
+         */
+        BUG_ON(((u64 *)swapper_pg_dir)[pgd_index(MEM_USER_INTRPT)] != 0);
+#endif
+
+        clone_pgd_range(pgd + KERNEL_PGD_INDEX_START,
+                        swapper_pg_dir + KERNEL_PGD_INDEX_START,
+                        KERNEL_PGD_PTRS);
+
+        pgd_list_add(pgd);
+        spin_unlock_irqrestore(&pgd_lock, flags);
+}
+
+static void pgd_dtor(pgd_t *pgd)
+{
+        unsigned long flags; /* can be called from interrupt context */
+
+        spin_lock_irqsave(&pgd_lock, flags);
+        pgd_list_del(pgd);
+        spin_unlock_irqrestore(&pgd_lock, flags);
+}
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+        pgd_t *pgd = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
+        if (pgd)
+                pgd_ctor(pgd);
+        return pgd;
+}
+
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+        pgd_dtor(pgd);
+        kmem_cache_free(pgd_cache, pgd);
+}
+
+
+#define L2_USER_PGTABLE_PAGES (1 << L2_USER_PGTABLE_ORDER)
+
+struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+        gfp_t flags = GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO|__GFP_COMP;
+        struct page *p;
+
+#ifdef CONFIG_HIGHPTE
+        flags |= __GFP_HIGHMEM;
+#endif
+
+        p = alloc_pages(flags, L2_USER_PGTABLE_ORDER);
+        if (p == NULL)
+                return NULL;
+
+        pgtable_page_ctor(p);
+        return p;
+}
+
+/*
+ * Free page immediately (used in __pte_alloc if we raced with another
+ * process).  We have to correct whatever pte_alloc_one() did before
+ * returning the pages to the allocator.
+ */
+void pte_free(struct mm_struct *mm, struct page *p)
+{
+        pgtable_page_dtor(p);
+        __free_pages(p, L2_USER_PGTABLE_ORDER);
+}
+
+void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
+                    unsigned long address)
+{
+        int i;
+
+        pgtable_page_dtor(pte);
+        tlb->need_flush = 1;
+        if (tlb_fast_mode(tlb)) {
+                struct page *pte_pages[L2_USER_PGTABLE_PAGES];
+                for (i = 0; i < L2_USER_PGTABLE_PAGES; ++i)
+                        pte_pages[i] = pte + i;
+                free_pages_and_swap_cache(pte_pages, L2_USER_PGTABLE_PAGES);
+                return;
+        }
+        for (i = 0; i < L2_USER_PGTABLE_PAGES; ++i) {
+                tlb->pages[tlb->nr++] = pte + i;
+                if (tlb->nr >= FREE_PTE_NR)
+                        tlb_flush_mmu(tlb, 0, 0);
+        }
+}
+
+#ifndef __tilegx__
+
+/*
+ * FIXME: needs to be atomic vs hypervisor writes.  For now we make the
+ * window of vulnerability a bit smaller by doing an unlocked 8-bit update.
+ */
+int ptep_test_and_clear_young(struct vm_area_struct *vma,
+                              unsigned long addr, pte_t *ptep)
+{
+#if HV_PTE_INDEX_ACCESSED < 8 || HV_PTE_INDEX_ACCESSED >= 16
+# error Code assumes HV_PTE "accessed" bit in second byte
+#endif
+        u8 *tmp = (u8 *)ptep;
+        u8 second_byte = tmp[1];
+        if (!(second_byte & (1 << (HV_PTE_INDEX_ACCESSED - 8))))
+                return 0;
+        tmp[1] = second_byte & ~(1 << (HV_PTE_INDEX_ACCESSED - 8));
+        return 1;
+}
+
+/*
+ * This implementation is atomic vs hypervisor writes, since the hypervisor
+ * always writes the low word (where "accessed" and "dirty" are) and this
+ * routine only writes the high word.
+ */
+void ptep_set_wrprotect(struct mm_struct *mm,
+                        unsigned long addr, pte_t *ptep)
+{
+#if HV_PTE_INDEX_WRITABLE < 32
+# error Code assumes HV_PTE "writable" bit in high word
+#endif
+        u32 *tmp = (u32 *)ptep;
+        tmp[1] = tmp[1] & ~(1 << (HV_PTE_INDEX_WRITABLE - 32));
+}
+
+#endif
+
+pte_t *virt_to_pte(struct mm_struct* mm, unsigned long addr)
+{
+        pgd_t *pgd;
+        pud_t *pud;
+        pmd_t *pmd;
+
+        if (pgd_addr_invalid(addr))
+                return NULL;
+
+        pgd = mm ? pgd_offset(mm, addr) : swapper_pg_dir + pgd_index(addr);
+        pud = pud_offset(pgd, addr);
+        if (!pud_present(*pud))
+                return NULL;
+        pmd = pmd_offset(pud, addr);
+        if (pmd_huge_page(*pmd))
+                return (pte_t *)pmd;
+        if (!pmd_present(*pmd))
+                return NULL;
+        return pte_offset_kernel(pmd, addr);
+}
+
+pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu)
+{
+        unsigned int width = smp_width;
+        int x = cpu % width;
+        int y = cpu / width;
+        BUG_ON(y >= smp_height);
+        BUG_ON(hv_pte_get_mode(prot) != HV_PTE_MODE_CACHE_TILE_L3);
+        BUG_ON(cpu < 0 || cpu >= NR_CPUS);
+        BUG_ON(!cpu_is_valid_lotar(cpu));
+        return hv_pte_set_lotar(prot, HV_XY_TO_LOTAR(x, y));
+}
+
+int get_remote_cache_cpu(pgprot_t prot)
+{
+        HV_LOTAR lotar = hv_pte_get_lotar(prot);
+        int x = HV_LOTAR_X(lotar);
+        int y = HV_LOTAR_Y(lotar);
+        BUG_ON(hv_pte_get_mode(prot) != HV_PTE_MODE_CACHE_TILE_L3);
+        return x + y * smp_width;
+}
+
+void set_pte_order(pte_t *ptep, pte_t pte, int order)
+{
+        unsigned long pfn = pte_pfn(pte);
+        struct page *page = pfn_to_page(pfn);
+
+        /* Update the home of a PTE if necessary */
+        pte = pte_set_home(pte, page_home(page));
+
+#ifdef __tilegx__
+        *ptep = pte;
+#else
+        /*
+         * When setting a PTE, write the high bits first, then write
+         * the low bits.  This sets the "present" bit only after the
+         * other bits are in place.  If a particular PTE update
+         * involves transitioning from one valid PTE to another, it
+         * may be necessary to call set_pte_order() more than once,
+         * transitioning via a suitable intermediate state.
+         * Note that this sequence also means that if we are transitioning
+         * from any migrating PTE to a non-migrating one, we will not
+         * see a half-updated PTE with the migrating bit off.
+         */
+#if HV_PTE_INDEX_PRESENT >= 32 || HV_PTE_INDEX_MIGRATING >= 32
+# error Must write the present and migrating bits last
+#endif
+        ((u32 *)ptep)[1] = (u32)(pte_val(pte) >> 32);
+        barrier();
+        ((u32 *)ptep)[0] = (u32)(pte_val(pte));
+#endif
+}
+
+/* Can this mm load a PTE with cached_priority set? */
+static inline int mm_is_priority_cached(struct mm_struct *mm)
+{
+        return mm->context.priority_cached;
+}
+
+/*
+ * Add a priority mapping to an mm_context and
+ * notify the hypervisor if this is the first one.
+ */
+void start_mm_caching(struct mm_struct *mm)
+{
+        if (!mm_is_priority_cached(mm)) {
+                mm->context.priority_cached = -1U;
+                hv_set_caching(-1U);
+        }
+}
+
+/*
+ * Validate and return the priority_cached flag.  We know if it's zero
+ * that we don't need to scan, since we immediately set it non-zero
+ * when we first consider a MAP_CACHE_PRIORITY mapping.
+ *
+ * We only _try_ to acquire the mmap_sem semaphore; if we can't acquire it,
+ * since we're in an interrupt context (servicing switch_mm) we don't
+ * worry about it and don't unset the "priority_cached" field.
+ * Presumably we'll come back later and have more luck and clear
+ * the value then; for now we'll just keep the cache marked for priority.
+ */
+static unsigned int update_priority_cached(struct mm_struct *mm)
+{
+        if (mm->context.priority_cached && down_write_trylock(&mm->mmap_sem)) {
+                struct vm_area_struct *vm;
+                for (vm = mm->mmap; vm; vm = vm->vm_next) {
+                        if (hv_pte_get_cached_priority(vm->vm_page_prot))
+                                break;
+                }
+                if (vm == NULL)
+                        mm->context.priority_cached = 0;
+                up_write(&mm->mmap_sem);
+        }
+        return mm->context.priority_cached;
+}
+
+/* Set caching correctly for an mm that we are switching to. */
+void check_mm_caching(struct mm_struct *prev, struct mm_struct *next)
+{
+        if (!mm_is_priority_cached(next)) {
+                /*
+                 * If the new mm doesn't use priority caching, just see if we
+                 * need the hv_set_caching(), or can assume it's already zero.
+                 */
+                if (mm_is_priority_cached(prev))
+                        hv_set_caching(0);
+        } else {
+                hv_set_caching(update_priority_cached(next));
+        }
+}
+
+#if CHIP_HAS_MMIO()
+
+/* Map an arbitrary MMIO address, homed according to pgprot, into VA space. */
+void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
+                           pgprot_t home)
+{
+        void *addr;
+        struct vm_struct *area;
+        unsigned long offset, last_addr;
+        pgprot_t pgprot;
+
+        /* Don't allow wraparound or zero size */
+        last_addr = phys_addr + size - 1;
+        if (!size || last_addr < phys_addr)
+                return NULL;
+
+        /* Create a read/write, MMIO VA mapping homed at the requested shim. */
+        pgprot = PAGE_KERNEL;
+        pgprot = hv_pte_set_mode(pgprot, HV_PTE_MODE_MMIO);
+        pgprot = hv_pte_set_lotar(pgprot, hv_pte_get_lotar(home));
+
+        /*
+         * Mappings have to be page-aligned
+         */
+        offset = phys_addr & ~PAGE_MASK;
+        phys_addr &= PAGE_MASK;
+        size = PAGE_ALIGN(last_addr+1) - phys_addr;
+
+        /*
+         * Ok, go for it..
+         */
+        area = get_vm_area(size, VM_IOREMAP /* | other flags? */);
+        if (!area)
+                return NULL;
+        area->phys_addr = phys_addr;
+        addr = area->addr;
+        if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
+                               phys_addr, pgprot)) {
+                remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr));
+                return NULL;
+        }
+        return (__force void __iomem *) (offset + (char *)addr);
+}
+EXPORT_SYMBOL(ioremap_prot);
+
+/* Map a PCI MMIO bus address into VA space. */
+void __iomem *ioremap(resource_size_t phys_addr, unsigned long size)
+{
+        panic("ioremap for PCI MMIO is not supported");
+}
+EXPORT_SYMBOL(ioremap);
+
+/* Unmap an MMIO VA mapping. */
+void iounmap(volatile void __iomem *addr_in)
+{
+        volatile void __iomem *addr = (volatile void __iomem *)
+                (PAGE_MASK & (unsigned long __force)addr_in);
+#if 1
+        vunmap((void * __force)addr);
+#else
+        /* x86 uses this complicated flow instead of vunmap().  Is
+         * there any particular reason we should do the same? */
+        struct vm_struct *p, *o;
+
+        /* Use the vm area unlocked, assuming the caller
+           ensures there isn't another iounmap for the same address
+           in parallel. Reuse of the virtual address is prevented by
+           leaving it in the global lists until we're done with it.
+           cpa takes care of the direct mappings. */
+        read_lock(&vmlist_lock);
+        for (p = vmlist; p; p = p->next) {
+                if (p->addr == addr)
+                        break;
+        }
+        read_unlock(&vmlist_lock);
+
+        if (!p) {
+                pr_err("iounmap: bad address %p\n", addr);
+                dump_stack();
+                return;
+        }
+
+        /* Finally remove it */
+        o = remove_vm_area((void *)addr);
+        BUG_ON(p != o || o == NULL);
+        kfree(p);
+#endif
+}
+EXPORT_SYMBOL(iounmap);
+
+#endif /* CHIP_HAS_MMIO() */