10 files changed, 445 insertions, 38 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 646a5d5eb8c..8381bd79314 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -846,10 +846,10 @@ source "kernel/time/Kconfig"
 
 config SMP
         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
-        depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
+        depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP ||ARCH_OMAP4)
         depends on GENERIC_CLOCKEVENTS
         select USE_GENERIC_SMP_HELPERS
-        select HAVE_ARM_SCU if ARCH_REALVIEW
+        select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
         help
           This enables support for systems with more than one CPU. If you have
           a system with only one CPU, like most personal computers, say N. If
@@ -917,9 +917,9 @@ config HOTPLUG_CPU
 
 config LOCAL_TIMERS
         bool "Use local timer interrupts"
-        depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
+        depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP || ARCH_OMAP4)
         default y
-        select HAVE_ARM_TWD if ARCH_REALVIEW
+        select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
         help
           Enable support for local timers on SMP platforms, rather then the
           legacy IPI broadcast method.  Local timers allows the system
diff --git a/arch/arm/configs/omap_4430sdp_defconfig b/arch/arm/configs/omap_4430sdp_defconfig
index 67a3a770cc2..23e43ea4efa 100644
--- a/arch/arm/configs/omap_4430sdp_defconfig
+++ b/arch/arm/configs/omap_4430sdp_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.29
-# Fri April 19 19:58:24 20089
+# Linux kernel version: 2.6.30-rc7
+# Tue Jun  9 12:36:23 2009
 #
 CONFIG_ARM=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
@@ -9,17 +9,13 @@ CONFIG_GENERIC_GPIO=y
 CONFIG_GENERIC_TIME=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_MMU=y
-# CONFIG_NO_IOPORT is not set
 CONFIG_GENERIC_HARDIRQS=y
 CONFIG_STACKTRACE_SUPPORT=y
-CONFIG_HAVE_LATENCYTOP_SUPPORT=y
 CONFIG_LOCKDEP_SUPPORT=y
 CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 CONFIG_HARDIRQS_SW_RESEND=y
 CONFIG_GENERIC_IRQ_PROBE=y
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
-# CONFIG_ARCH_HAS_ILOG2_U32 is not set
-# CONFIG_ARCH_HAS_ILOG2_U64 is not set
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
 CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
@@ -30,7 +26,7 @@ CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
 # General setup
 #
 CONFIG_EXPERIMENTAL=y
-CONFIG_BROKEN_ON_SMP=y
+CONFIG_LOCK_KERNEL=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_LOCALVERSION=""
 CONFIG_LOCALVERSION_AUTO=y
@@ -62,6 +58,9 @@ CONFIG_SYSFS_DEPRECATED_V2=y
 # CONFIG_NAMESPACES is not set
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_INITRAMFS_SOURCE=""
+CONFIG_RD_GZIP=y
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_SYSCTL=y
 CONFIG_ANON_INODES=y
@@ -71,6 +70,7 @@ CONFIG_UID16=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 # CONFIG_KALLSYMS_EXTRA_PASS is not set
+# CONFIG_STRIP_ASM_SYMS is not set
 CONFIG_HOTPLUG=y
 CONFIG_PRINTK=y
 CONFIG_BUG=y
@@ -84,16 +84,20 @@ CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_AIO=y
 CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_SLUB_DEBUG=y
 CONFIG_COMPAT_BRK=y
 # CONFIG_SLAB is not set
-# CONFIG_SLUB is not set
+CONFIG_SLUB=y
 # CONFIG_SLOB is not set
 # CONFIG_PROFILING is not set
+# CONFIG_MARKERS is not set
 CONFIG_HAVE_OPROFILE=y
 # CONFIG_KPROBES is not set
 CONFIG_HAVE_KPROBES=y
 CONFIG_HAVE_KRETPROBES=y
+CONFIG_USE_GENERIC_SMP_HELPERS=y
 CONFIG_HAVE_CLK=y
+# CONFIG_SLOW_WORK is not set
 CONFIG_HAVE_GENERIC_DMA_COHERENT=y
 CONFIG_SLABINFO=y
 CONFIG_RT_MUTEXES=y
@@ -104,9 +108,9 @@ CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODULE_FORCE_UNLOAD is not set
 CONFIG_MODVERSIONS=y
 CONFIG_MODULE_SRCVERSION_ALL=y
+CONFIG_STOP_MACHINE=y
 CONFIG_BLOCK=y
 # CONFIG_LBD is not set
-# CONFIG_BLK_DEV_IO_TRACE is not set
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_BLK_DEV_INTEGRITY is not set
 
@@ -133,12 +137,13 @@ CONFIG_DEFAULT_IOSCHED="anticipatory"
 # CONFIG_ARCH_VERSATILE is not set
 # CONFIG_ARCH_AT91 is not set
 # CONFIG_ARCH_CLPS711X is not set
+# CONFIG_ARCH_GEMINI is not set
 # CONFIG_ARCH_EBSA110 is not set
 # CONFIG_ARCH_EP93XX is not set
 # CONFIG_ARCH_FOOTBRIDGE is not set
+# CONFIG_ARCH_MXC is not set
 # CONFIG_ARCH_NETX is not set
 # CONFIG_ARCH_H720X is not set
-# CONFIG_ARCH_IMX is not set
 # CONFIG_ARCH_IOP13XX is not set
 # CONFIG_ARCH_IOP32X is not set
 # CONFIG_ARCH_IOP33X is not set
@@ -147,14 +152,16 @@ CONFIG_DEFAULT_IOSCHED="anticipatory"
 # CONFIG_ARCH_IXP4XX is not set
 # CONFIG_ARCH_L7200 is not set
 # CONFIG_ARCH_KIRKWOOD is not set
-# CONFIG_ARCH_KS8695 is not set
-# CONFIG_ARCH_NS9XXX is not set
 # CONFIG_ARCH_LOKI is not set
 # CONFIG_ARCH_MV78XX0 is not set
-# CONFIG_ARCH_MXC is not set
 # CONFIG_ARCH_ORION5X is not set
+# CONFIG_ARCH_MMP is not set
+# CONFIG_ARCH_KS8695 is not set
+# CONFIG_ARCH_NS9XXX is not set
+# CONFIG_ARCH_W90X900 is not set
 # CONFIG_ARCH_PNX4008 is not set
 # CONFIG_ARCH_PXA is not set
+# CONFIG_ARCH_MSM is not set
 # CONFIG_ARCH_RPC is not set
 # CONFIG_ARCH_SA1100 is not set
 # CONFIG_ARCH_S3C2410 is not set
@@ -163,8 +170,6 @@ CONFIG_DEFAULT_IOSCHED="anticipatory"
 # CONFIG_ARCH_LH7A40X is not set
 # CONFIG_ARCH_DAVINCI is not set
 CONFIG_ARCH_OMAP=y
-# CONFIG_ARCH_MSM is not set
-# CONFIG_ARCH_W90X900 is not set
 
 #
 # TI OMAP Implementations
@@ -178,8 +183,6 @@ CONFIG_ARCH_OMAP4=y
 # OMAP Feature Selections
 #
 # CONFIG_OMAP_RESET_CLOCKS is not set
-# CONFIG_OMAP_COMPONENT_VERSION is not set
-# CONFIG_OMAP_GPIO_SWITCH is not set
 # CONFIG_OMAP_MUX is not set
 # CONFIG_OMAP_MCBSP is not set
 # CONFIG_OMAP_MBOX_FWK is not set
@@ -191,8 +194,6 @@ CONFIG_OMAP_LL_DEBUG_UART1=y
 # CONFIG_OMAP_LL_DEBUG_UART2 is not set
 # CONFIG_OMAP_LL_DEBUG_UART3 is not set
 
-
-
 #
 # OMAP Board Type
 #
@@ -224,7 +225,9 @@ CONFIG_CPU_CP15_MMU=y
 CONFIG_CPU_DCACHE_DISABLE=y
 # CONFIG_CPU_BPREDICT_DISABLE is not set
 CONFIG_HAS_TLS_REG=y
-# CONFIG_OUTER_CACHE is not set
+# CONFIG_ARM_ERRATA_430973 is not set
+# CONFIG_ARM_ERRATA_458693 is not set
+# CONFIG_ARM_ERRATA_460075 is not set
 CONFIG_ARM_GIC=y
 
 #
@@ -240,17 +243,23 @@ CONFIG_ARM_GIC=y
 # CONFIG_NO_HZ is not set
 # CONFIG_HIGH_RES_TIMERS is not set
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_SMP=y
+CONFIG_HAVE_ARM_SCU=y
+CONFIG_HAVE_ARM_TWD=y
 CONFIG_VMSPLIT_3G=y
 # CONFIG_VMSPLIT_2G is not set
 # CONFIG_VMSPLIT_1G is not set
 CONFIG_PAGE_OFFSET=0xC0000000
+CONFIG_NR_CPUS=2
+# CONFIG_HOTPLUG_CPU is not set
+CONFIG_LOCAL_TIMERS=y
 # CONFIG_PREEMPT is not set
 CONFIG_HZ=128
 CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set
-CONFIG_ARCH_FLATMEM_HAS_HOLES=y
 # CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
 # CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
+# CONFIG_HIGHMEM is not set
 CONFIG_SELECT_MEMORY_MODEL=y
 CONFIG_FLATMEM_MANUAL=y
 # CONFIG_DISCONTIGMEM_MANUAL is not set
@@ -263,6 +272,7 @@ CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_ZONE_DMA_FLAG=0
 CONFIG_VIRT_TO_BUS=y
 # CONFIG_UNEVICTABLE_LRU is not set
+CONFIG_HAVE_MLOCK=y
 # CONFIG_LEDS is not set
 CONFIG_ALIGNMENT_TRAP=y
 
@@ -288,9 +298,6 @@ CONFIG_CMDLINE="root=/dev/ram0 rw mem=128M console=ttyS0,115200n8 initrd=0x81600
 #
 # At least one emulation must be selected
 #
-CONFIG_FPE_NWFPE=y
-# CONFIG_FPE_NWFPE_XP is not set
-# CONFIG_FPE_FASTFPE is not set
 CONFIG_VFP=y
 CONFIG_VFPv3=y
 # CONFIG_NEON is not set
@@ -299,7 +306,6 @@ CONFIG_VFPv3=y
 # Userspace binary formats
 #
 CONFIG_BINFMT_ELF=y
-# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_HAVE_AOUT=y
 # CONFIG_BINFMT_AOUT is not set
 CONFIG_BINFMT_MISC=y
@@ -415,6 +421,7 @@ CONFIG_UNIX98_PTYS=y
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_IPMI_HANDLER is not set
 CONFIG_HW_RANDOM=y
+# CONFIG_HW_RANDOM_TIMERIOMEM is not set
 # CONFIG_R3964 is not set
 # CONFIG_RAW_DRIVER is not set
 # CONFIG_TCG_TPM is not set
@@ -509,22 +516,19 @@ CONFIG_DUMMY_CONSOLE=y
 CONFIG_RTC_LIB=y
 # CONFIG_RTC_CLASS is not set
 # CONFIG_DMADEVICES is not set
+# CONFIG_AUXDISPLAY is not set
 # CONFIG_REGULATOR is not set
 # CONFIG_UIO is not set
 # CONFIG_STAGING is not set
 
 #
-# CBUS support
-#
-# CONFIG_CBUS is not set
-
-#
 # File systems
 #
 CONFIG_EXT2_FS=y
 # CONFIG_EXT2_FS_XATTR is not set
 # CONFIG_EXT2_FS_XIP is not set
 CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
 # CONFIG_EXT3_FS_XATTR is not set
 # CONFIG_EXT4_FS is not set
 CONFIG_JBD=y
@@ -548,6 +552,11 @@ CONFIG_QUOTACTL=y
 # CONFIG_FUSE_FS is not set
 
 #
+# Caches
+#
+# CONFIG_FSCACHE is not set
+
+#
 # CD-ROM/DVD Filesystems
 #
 # CONFIG_ISO9660_FS is not set
@@ -568,6 +577,7 @@ CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
 #
 CONFIG_PROC_FS=y
 CONFIG_PROC_SYSCTL=y
+CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_SYSFS=y
 CONFIG_TMPFS=y
 # CONFIG_TMPFS_POSIX_ACL is not set
@@ -591,6 +601,7 @@ CONFIG_MISC_FILESYSTEMS=y
 # CONFIG_ROMFS_FS is not set
 # CONFIG_SYSV_FS is not set
 # CONFIG_UFS_FS is not set
+# CONFIG_NILFS2_FS is not set
 
 #
 # Partition Types
@@ -666,11 +677,37 @@ CONFIG_MAGIC_SYSRQ=y
 # CONFIG_DEBUG_FS is not set
 # CONFIG_HEADERS_CHECK is not set
 CONFIG_DEBUG_KERNEL=y
+# CONFIG_DEBUG_SHIRQ is not set
+CONFIG_DETECT_SOFTLOCKUP=y
+# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
+CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
+CONFIG_DETECT_HUNG_TASK=y
+# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
+CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
+CONFIG_SCHED_DEBUG=y
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_TIMER_STATS is not set
+# CONFIG_DEBUG_OBJECTS is not set
+# CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_SLUB_STATS is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_RT_MUTEX_TESTER is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_PROVE_LOCKING is not set
+# CONFIG_LOCK_STAT is not set
+# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_KOBJECT is not set
 # CONFIG_DEBUG_BUGVERBOSE is not set
 CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_VM is not set
 # CONFIG_DEBUG_WRITECOUNT is not set
 # CONFIG_DEBUG_MEMORY_INIT is not set
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_SG is not set
+# CONFIG_DEBUG_NOTIFIERS is not set
 CONFIG_FRAME_POINTER=y
 # CONFIG_BOOT_PRINTK_DELAY is not set
 # CONFIG_RCU_TORTURE_TEST is not set
@@ -678,8 +715,9 @@ CONFIG_FRAME_POINTER=y
 # CONFIG_BACKTRACE_SELF_TEST is not set
 # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
 # CONFIG_FAULT_INJECTION is not set
-# CONFIG_LATENCYTOP is not set
+# CONFIG_PAGE_POISONING is not set
 CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_TRACING_SUPPORT=y
 
 #
 # Tracers
@@ -688,17 +726,21 @@ CONFIG_HAVE_FUNCTION_TRACER=y
 # CONFIG_IRQSOFF_TRACER is not set
 # CONFIG_SCHED_TRACER is not set
 # CONFIG_CONTEXT_SWITCH_TRACER is not set
+# CONFIG_EVENT_TRACER is not set
 # CONFIG_BOOT_TRACER is not set
 # CONFIG_TRACE_BRANCH_PROFILING is not set
 # CONFIG_STACK_TRACER is not set
-# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
+# CONFIG_KMEMTRACE is not set
+# CONFIG_WORKQUEUE_TRACER is not set
+# CONFIG_BLK_DEV_IO_TRACE is not set
 # CONFIG_SAMPLES is not set
 CONFIG_HAVE_ARCH_KGDB=y
 # CONFIG_KGDB is not set
+# CONFIG_ARM_UNWIND is not set
 # CONFIG_DEBUG_USER is not set
 # CONFIG_DEBUG_ERRORS is not set
 # CONFIG_DEBUG_STACK_USAGE is not set
-# CONFIG_DEBUG_ICEDCC is not set
+# CONFIG_DEBUG_LL is not set
 
 #
 # Security options
@@ -712,11 +754,21 @@ CONFIG_CRYPTO=y
 #
 # Crypto core or helper
 #
+# CONFIG_CRYPTO_FIPS is not set
 CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_ALGAPI2=y
+CONFIG_CRYPTO_AEAD2=y
 CONFIG_CRYPTO_BLKCIPHER=y
+CONFIG_CRYPTO_BLKCIPHER2=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_PCOMP=y
 CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MANAGER2=y
 # CONFIG_CRYPTO_GF128MUL is not set
 # CONFIG_CRYPTO_NULL is not set
+CONFIG_CRYPTO_WORKQUEUE=y
 # CONFIG_CRYPTO_CRYPTD is not set
 # CONFIG_CRYPTO_AUTHENC is not set
 # CONFIG_CRYPTO_TEST is not set
@@ -785,8 +837,15 @@ CONFIG_CRYPTO_DES=y
 # Compression
 #
 # CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_ZLIB is not set
 # CONFIG_CRYPTO_LZO is not set
+
+#
+# Random Number Generation
+#
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
 CONFIG_CRYPTO_HW=y
+# CONFIG_BINARY_PRINTF is not set
 
 #
 # Library routines
@@ -800,7 +859,8 @@ CONFIG_CRC_T10DIF=y
 CONFIG_CRC32=y
 # CONFIG_CRC7 is not set
 CONFIG_LIBCRC32C=y
-CONFIG_PLIST=y
+CONFIG_ZLIB_INFLATE=y
+CONFIG_DECOMPRESS_GZIP=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y
 CONFIG_HAS_DMA=y
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 6226e64d99a..735bae5b0de 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -14,6 +14,10 @@ obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(prcm-common) $(clock-common)
 
 obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
 
+# SMP support ONLY available for OMAP4
+obj-$(CONFIG_SMP)                       += omap-smp.o omap-headsmp.o
+obj-$(CONFIG_LOCAL_TIMERS)              += timer-mpu.o
+
 # Functions loaded to SRAM
 obj-$(CONFIG_ARCH_OMAP2420)             += sram242x.o
 obj-$(CONFIG_ARCH_OMAP2430)             += sram243x.o
diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
new file mode 100644
index 00000000000..4afadba0947
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-headsmp.S
@@ -0,0 +1,46 @@
+/*
+ * Secondary CPU startup routine source file.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Interface functions needed for the SMP. This file is based on arm
+ * realview smp platform.
+ * Copyright (c) 2003 ARM Limited.
+ *
+ * This program is free software,you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+/* Physical address needed since MMU not enabled yet on secondary core */
+#define OMAP4_AUX_CORE_BOOT1_PA                 0x48281804
+
+        __INIT
+
+/*
+ * OMAP4 specific entry point for secondary CPU to jump from ROM
+ * code.  This routine also provides a holding flag into which
+ * secondary core is held until we're ready for it to initialise.
+ * The primary core will update the this flag using a hardware
+ * register AuxCoreBoot1.
+ */
+ENTRY(omap_secondary_startup)
+        mrc     p15, 0, r0, c0, c0, 5
+        and     r0, r0, #0x0f
+hold:   ldr     r1, =OMAP4_AUX_CORE_BOOT1_PA    @ read from AuxCoreBoot1
+        ldr     r2, [r1]
+        cmp     r2, r0
+        bne     hold
+
+        /*
+         * we've been released from the cpu_release,secondary_stack
+         * should now contain the SVC stack for this core
+         */
+        b       secondary_startup
+
diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c
new file mode 100644
index 00000000000..8fe8d230f21
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-smp.c
@@ -0,0 +1,178 @@
+/*
+ * OMAP4 SMP source file. It contains platform specific fucntions
+ * needed for the linux smp kernel.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Platform file needed for the OMAP4 SMP. This file is based on arm
+ * realview smp platform.
+ * * Copyright (c) 2002 ARM Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/jiffies.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/localtimer.h>
+#include <asm/smp_scu.h>
+#include <mach/hardware.h>
+
+/* Registers used for communicating startup information */
+#define OMAP4_AUXCOREBOOT_REG0          (OMAP44XX_VA_WKUPGEN_BASE + 0x800)
+#define OMAP4_AUXCOREBOOT_REG1          (OMAP44XX_VA_WKUPGEN_BASE + 0x804)
+
+/* SCU base address */
+static void __iomem *scu_base = OMAP44XX_VA_SCU_BASE;
+
+/*
+ * Use SCU config register to count number of cores
+ */
+static inline unsigned int get_core_count(void)
+{
+        if (scu_base)
+                return scu_get_core_count(scu_base);
+        return 1;
+}
+
+static DEFINE_SPINLOCK(boot_lock);
+
+void __cpuinit platform_secondary_init(unsigned int cpu)
+{
+        trace_hardirqs_off();
+
+        /*
+         * If any interrupts are already enabled for the primary
+         * core (e.g. timer irq), then they will not have been enabled
+         * for us: do so
+         */
+
+        gic_cpu_init(0, IO_ADDRESS(OMAP44XX_GIC_CPU_BASE));
+
+        /*
+         * Synchronise with the boot thread.
+         */
+        spin_lock(&boot_lock);
+        spin_unlock(&boot_lock);
+}
+
+int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+        unsigned long timeout;
+
+        /*
+         * Set synchronisation state between this boot processor
+         * and the secondary one
+         */
+        spin_lock(&boot_lock);
+
+        /*
+         * Update the AuxCoreBoot1 with boot state for secondary core.
+         * omap_secondary_startup() routine will hold the secondary core till
+         * the AuxCoreBoot1 register is updated with cpu state
+         * A barrier is added to ensure that write buffer is drained
+         */
+        __raw_writel(cpu, OMAP4_AUXCOREBOOT_REG1);
+        smp_wmb();
+
+        timeout = jiffies + (1 * HZ);
+        while (time_before(jiffies, timeout))
+                ;
+
+        /*
+         * Now the secondary core is starting up let it run its
+         * calibrations, then wait for it to finish
+         */
+        spin_unlock(&boot_lock);
+
+        return 0;
+}
+
+static void __init wakeup_secondary(void)
+{
+        /*
+         * Write the address of secondary startup routine into the
+         * AuxCoreBoot0 where ROM code will jump and start executing
+         * on secondary core once out of WFE
+         * A barrier is added to ensure that write buffer is drained
+         */
+        __raw_writel(virt_to_phys(omap_secondary_startup),         \
+                                        OMAP4_AUXCOREBOOT_REG0);
+        smp_wmb();
+
+        /*
+         * Send a 'sev' to wake the secondary core from WFE.
+         */
+        set_event();
+        mb();
+}
+
+/*
+ * Initialise the CPU possible map early - this describes the CPUs
+ * which may be present or become present in the system.
+ */
+void __init smp_init_cpus(void)
+{
+        unsigned int i, ncores = get_core_count();
+
+        for (i = 0; i < ncores; i++)
+                set_cpu_possible(i, true);
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+        unsigned int ncores = get_core_count();
+        unsigned int cpu = smp_processor_id();
+        int i;
+
+        /* sanity check */
+        if (ncores == 0) {
+                printk(KERN_ERR
+                       "OMAP4: strange core count of 0? Default to 1\n");
+                ncores = 1;
+        }
+
+        if (ncores > NR_CPUS) {
+                printk(KERN_WARNING
+                       "OMAP4: no. of cores (%d) greater than configured "
+                       "maximum of %d - clipping\n",
+                       ncores, NR_CPUS);
+                ncores = NR_CPUS;
+        }
+        smp_store_cpu_info(cpu);
+
+        /*
+         * are we trying to boot more cores than exist?
+         */
+        if (max_cpus > ncores)
+                max_cpus = ncores;
+
+        /*
+         * Initialise the present map, which describes the set of CPUs
+         * actually populated at the present time.
+         */
+        for (i = 0; i < max_cpus; i++)
+                set_cpu_present(i, true);
+
+        if (max_cpus > 1) {
+                /*
+                 * Enable the local timer or broadcast device for the
+                 * boot CPU, but only if we have more than one CPU.
+                 */
+                percpu_timer_setup();
+
+                /*
+                 * Initialise the SCU and wake up the secondary core using
+                 * wakeup_secondary().
+                 */
+                scu_enable(scu_base);
+                wakeup_secondary();
+        }
+}
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 2ce474a9d2b..97eeeebcb06 100644
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -38,6 +38,7 @@
 
 #include <asm/mach/time.h>
 #include <mach/dmtimer.h>
+#include <asm/localtimer.h>
 
 /* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
 #define MAX_GPTIMER_ID          12
@@ -229,6 +230,9 @@ static void __init omap2_gp_clocksource_init(void)
 
 static void __init omap2_gp_timer_init(void)
 {
+#ifdef CONFIG_LOCAL_TIMERS
+        twd_base = IO_ADDRESS(OMAP44XX_LOCAL_TWD_BASE);
+#endif
         omap_dm_timer_init();
 
         omap2_gp_clockevent_init();
diff --git a/arch/arm/mach-omap2/timer-mpu.c b/arch/arm/mach-omap2/timer-mpu.c
new file mode 100644
index 00000000000..c1a650a9910
--- /dev/null
+++ b/arch/arm/mach-omap2/timer-mpu.c
@@ -0,0 +1,34 @@
+/*
+ * The MPU local timer source file. In OMAP4, both cortex-a9 cores have
+ * own timer in it's MPU domain. These timers will be driving the
+ * linux kernel SMP tick framework when active. These timers are not
+ * part of the wake up domain.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * This file is based on arm realview smp platform file.
+ * Copyright (C) 2002 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/clockchips.h>
+#include <asm/irq.h>
+#include <asm/smp_twd.h>
+#include <asm/localtimer.h>
+
+/*
+ * Setup the local clock events for a CPU.
+ */
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
+{
+        evt->irq = INT_44XX_LOCALTIMER_IRQ;
+        twd_timer_setup(evt);
+}
+
diff --git a/arch/arm/plat-omap/include/mach/entry-macro.S b/arch/arm/plat-omap/include/mach/entry-macro.S
index 00f45c01390..56426ed45ef 100644
--- a/arch/arm/plat-omap/include/mach/entry-macro.S
+++ b/arch/arm/plat-omap/include/mach/entry-macro.S
@@ -136,6 +136,34 @@
                 cmpne   \irqnr, \tmp
                 cmpcs   \irqnr, \irqnr
                 .endm
+
+                /* We assume that irqstat (the raw value of the IRQ acknowledge
+                 * register) is preserved from the macro above.
+                 * If there is an IPI, we immediately signal end of interrupt
+                 * on the controller, since this requires the original irqstat
+                 * value which we won't easily be able to recreate later.
+                 */
+
+                .macro test_for_ipi, irqnr, irqstat, base, tmp
+                bic     \irqnr, \irqstat, #0x1c00
+                cmp     \irqnr, #16
+                it      cc
+                strcc   \irqstat, [\base, #GIC_CPU_EOI]
+                it      cs
+                cmpcs   \irqnr, \irqnr
+                .endm
+
+                /* As above, this assumes that irqstat and base are preserved */
+
+                .macro test_for_ltirq, irqnr, irqstat, base, tmp
+                bic     \irqnr, \irqstat, #0x1c00
+                mov     \tmp, #0
+                cmp     \irqnr, #29
+                itt     eq
+                moveq   \tmp, #1
+                streq   \irqstat, [\base, #GIC_CPU_EOI]
+                cmp     \tmp, #0
+                .endm
 #endif
 
                 .macro  irq_prio_table
diff --git a/arch/arm/plat-omap/include/mach/irqs.h b/arch/arm/plat-omap/include/mach/irqs.h
index 8015fe27c8b..fb7cb772399 100644
--- a/arch/arm/plat-omap/include/mach/irqs.h
+++ b/arch/arm/plat-omap/include/mach/irqs.h
@@ -427,6 +427,8 @@
 
 
 #define IRQ_GIC_START           32
+#define INT_44XX_LOCALTIMER_IRQ 29
+#define INT_44XX_LOCALWDT_IRQ   30
 
 #define INT_44XX_BENCH_MPU_EMUL (3 + IRQ_GIC_START)
 #define INT_44XX_SSM_ABORT_IRQ  (6 + IRQ_GIC_START)
diff --git a/arch/arm/plat-omap/include/mach/smp.h b/arch/arm/plat-omap/include/mach/smp.h
new file mode 100644
index 00000000000..dcaa8fde706
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/smp.h
@@ -0,0 +1,51 @@
+/*
+ * OMAP4 machine specific smp.h
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Interface functions needed for the SMP. This file is based on arm
+ * realview smp platform.
+ * Copyright (c) 2003 ARM Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef OMAP_ARCH_SMP_H
+#define OMAP_ARCH_SMP_H
+
+#include <asm/hardware/gic.h>
+
+/*
+ * set_event() is used to wake up secondary core from wfe using sev. ROM
+ * code puts the second core into wfe(standby).
+ *
+ */
+#define set_event()     __asm__ __volatile__ ("sev" : : : "memory")
+
+/* Needed for secondary core boot */
+extern void omap_secondary_startup(void);
+
+/*
+ * We use Soft IRQ1 as the IPI
+ */
+static inline void smp_cross_call(const struct cpumask *mask)
+{
+        gic_raise_softirq(mask, 1);
+}
+
+/*
+ * Read MPIDR: Multiprocessor affinity register
+ */
+#define hard_smp_processor_id()                 \
+        ({                                              \
+                unsigned int cpunum;                    \
+                __asm__("mrc p15, 0, %0, c0, c0, 5"     \
+                        : "=r" (cpunum));               \
+                cpunum &= 0x0F;                         \
+        })
+
+#endif