Hexagon: Add configuration and makefiles for the Hexagon architecture.

Signed-off-by: Linas Vepstas <linas@codeaurora.org>
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 210 insertions, 0 deletions

diff --git a/arch/hexagon/kernel/Makefile b/arch/hexagon/kernel/Makefile
new file mode 100644
index 000000000000..3689f3754d09
--- /dev/null
+++ b/arch/hexagon/kernel/Makefile
@@ -0,0 +1,18 @@
+extra-y := head.o vmlinux.lds init_task.o
+
+obj-$(CONFIG_SMP) += smp.o topology.o
+
+obj-y += setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o
+obj-y += process.o syscall.o trampoline.o reset.o ptrace.o
+obj-y += vdso.o
+
+obj-$(CONFIG_KGDB)    += kgdb.o
+obj-$(CONFIG_MODULES) += module.o hexagon_ksyms.o
+
+# Modules required to work with the Hexagon Virtual Machine
+obj-y += vm_entry.o vm_events.o vm_switch.o vm_ops.o vm_init_segtable.o
+obj-y += vm_vectors.o
+
+obj-$(CONFIG_HAS_DMA) += dma.o
+
+obj-$(CONFIG_STACKTRACE) += stacktrace.o
diff --git a/arch/hexagon/kernel/asm-offsets.c b/arch/hexagon/kernel/asm-offsets.c
new file mode 100644
index 000000000000..89ffa514611f
--- /dev/null
+++ b/arch/hexagon/kernel/asm-offsets.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 1996 David S. Miller
+ * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.
+ *
+ * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/compat.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/kbuild.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+
+/*  This file is used to produce asm/linkerscript constants from header
+    files typically used in c.  Specifically, it generates asm-offsets.h  */
+
+int main(void)
+{
+        COMMENT("This is a comment.");
+        /*  might get these from somewhere else.  */
+        DEFINE(_PAGE_SIZE, PAGE_SIZE);
+        DEFINE(_PAGE_SHIFT, PAGE_SHIFT);
+        BLANK();
+
+        COMMENT("Hexagon pt_regs definitions");
+        OFFSET(_PT_SYSCALL_NR, pt_regs, syscall_nr);
+        OFFSET(_PT_UGPGP, pt_regs, ugpgp);
+        OFFSET(_PT_R3130, pt_regs, r3130);
+        OFFSET(_PT_R2928, pt_regs, r2928);
+        OFFSET(_PT_R2726, pt_regs, r2726);
+        OFFSET(_PT_R2524, pt_regs, r2524);
+        OFFSET(_PT_R2322, pt_regs, r2322);
+        OFFSET(_PT_R2120, pt_regs, r2120);
+        OFFSET(_PT_R1918, pt_regs, r1918);
+        OFFSET(_PT_R1716, pt_regs, r1716);
+        OFFSET(_PT_R1514, pt_regs, r1514);
+        OFFSET(_PT_R1312, pt_regs, r1312);
+        OFFSET(_PT_R1110, pt_regs, r1110);
+        OFFSET(_PT_R0908, pt_regs, r0908);
+        OFFSET(_PT_R0706, pt_regs, r0706);
+        OFFSET(_PT_R0504, pt_regs, r0504);
+        OFFSET(_PT_R0302, pt_regs, r0302);
+        OFFSET(_PT_R0100, pt_regs, r0100);
+        OFFSET(_PT_LC0SA0, pt_regs, lc0sa0);
+        OFFSET(_PT_LC1SA1, pt_regs, lc1sa1);
+        OFFSET(_PT_M1M0, pt_regs, m1m0);
+        OFFSET(_PT_PREDSUSR, pt_regs, predsusr);
+        OFFSET(_PT_EVREC, pt_regs, hvmer);
+        OFFSET(_PT_ER_VMEL, pt_regs, hvmer.vmel);
+        OFFSET(_PT_ER_VMEST, pt_regs, hvmer.vmest);
+        OFFSET(_PT_ER_VMPSP, pt_regs, hvmer.vmpsp);
+        OFFSET(_PT_ER_VMBADVA, pt_regs, hvmer.vmbadva);
+        DEFINE(_PT_REGS_SIZE, sizeof(struct pt_regs));
+        BLANK();
+
+        COMMENT("Hexagon thread_info definitions");
+        OFFSET(_THREAD_INFO_FLAGS, thread_info, flags);
+        OFFSET(_THREAD_INFO_PT_REGS, thread_info, regs);
+        OFFSET(_THREAD_INFO_SP, thread_info, sp);
+        DEFINE(_THREAD_SIZE, THREAD_SIZE);
+        BLANK();
+
+        COMMENT("Hexagon hexagon_switch_stack definitions");
+        OFFSET(_SWITCH_R1716, hexagon_switch_stack, r1716);
+        OFFSET(_SWITCH_R1918, hexagon_switch_stack, r1918);
+        OFFSET(_SWITCH_R2120, hexagon_switch_stack, r2120);
+        OFFSET(_SWITCH_R2322, hexagon_switch_stack, r2322);
+
+        OFFSET(_SWITCH_R2524, hexagon_switch_stack, r2524);
+        OFFSET(_SWITCH_R2726, hexagon_switch_stack, r2726);
+        OFFSET(_SWITCH_FP, hexagon_switch_stack, fp);
+        OFFSET(_SWITCH_LR, hexagon_switch_stack, lr);
+        DEFINE(_SWITCH_STACK_SIZE, sizeof(struct hexagon_switch_stack));
+        BLANK();
+
+        COMMENT("Hexagon task_struct definitions");
+        OFFSET(_TASK_THREAD_INFO, task_struct, stack);
+        OFFSET(_TASK_STRUCT_THREAD, task_struct, thread);
+
+        COMMENT("Hexagon thread_struct definitions");
+        OFFSET(_THREAD_STRUCT_SWITCH_SP, thread_struct, switch_sp);
+
+        return 0;
+}
diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S
new file mode 100644
index 000000000000..071d3c30edfb
--- /dev/null
+++ b/arch/hexagon/kernel/vmlinux.lds.S
@@ -0,0 +1,88 @@
+/*
+ * Linker script for Hexagon kernel
+ *
+ * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#define LOAD_OFFSET PAGE_OFFSET
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/asm-offsets.h>    /*  Most of the kernel defines are here  */
+#include <asm/mem-layout.h>     /*  except for page_offset  */
+#include <asm/cache.h>          /*  and now we're pulling cache line size  */
+OUTPUT_ARCH(hexagon)
+ENTRY(stext)
+
+jiffies = jiffies_64;
+
+/*
+See asm-generic/vmlinux.lds.h for expansion of some of these macros.
+See asm-generic/sections.h for seemingly required labels.
+*/
+
+#define PAGE_SIZE _PAGE_SIZE
+
+/*  This LOAD_OFFSET is temporary for debugging on the simulator; it may change
+    for hypervisor pseudo-physical memory.  */
+
+
+SECTIONS
+{
+        . = PAGE_OFFSET + LOAD_ADDRESS;
+
+        __init_begin = .;
+        HEAD_TEXT_SECTION
+        INIT_TEXT_SECTION(PAGE_SIZE)
+        PERCPU_SECTION(L1_CACHE_BYTES)
+        __init_end = .;
+
+        . = ALIGN(_PAGE_SIZE);
+        _stext = .;
+        .text : AT(ADDR(.text) - LOAD_OFFSET) {
+                _text = .;
+                TEXT_TEXT
+                SCHED_TEXT
+                LOCK_TEXT
+                KPROBES_TEXT
+                *(.fixup)
+        }
+        _etext = .;
+
+        INIT_DATA_SECTION(PAGE_SIZE)
+
+        _sdata = .;
+                RW_DATA_SECTION(32,PAGE_SIZE,PAGE_SIZE)
+                RO_DATA_SECTION(PAGE_SIZE)
+        _edata = .;
+
+        EXCEPTION_TABLE(16)
+        NOTES
+
+        BSS_SECTION(_PAGE_SIZE, _PAGE_SIZE, _PAGE_SIZE)
+
+        _end = .;
+
+        /DISCARD/ : {
+                EXIT_TEXT
+                EXIT_DATA
+                EXIT_CALL
+        }
+
+        STABS_DEBUG
+        DWARF_DEBUG
+
+}