[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 2

The attached patches provides part 2 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 160 insertions, 0 deletions

diff --git a/arch/xtensa/boot/boot-elf/Makefile b/arch/xtensa/boot/boot-elf/Makefile
new file mode 100644
index 000000000000..f6ef6a369667
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/Makefile
@@ -0,0 +1,52 @@
+#
+# 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.
+#
+
+GZIP = gzip
+GZIP_FLAGS = -v9fc
+
+ifeq ($(BIG_ENDIAN),1)
+OBJCOPY_ARGS    := -O elf32-xtensa-be
+else
+OBJCOPY_ARGS    := -O elf32-xtensa-le
+endif
+
+export OBJCOPY_ARGS
+
+boot-y          := bootstrap.o
+
+OBJS            := $(addprefix $(obj)/,$(boot-y))
+
+Image:  vmlinux $(OBJS)
+        $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \
+                vmlinux vmlinux.tmp
+        $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+                --add-section image=vmlinux.tmp \
+                --set-section-flags image=contents,alloc,load,load,data \
+                $(OBJS) $@.tmp
+        $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
+                -T arch/$(ARCH)/boot/boot-elf/boot.ld \
+                -o arch/$(ARCH)/boot/$@.elf $@.tmp
+        rm -f $@.tmp vmlinux.tmp
+
+Image.initrd:   vmlinux $(OBJS)
+        $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \
+                --add-section .initrd=arch/$(ARCH)/boot/ramdisk \
+                --set-section-flags .initrd=contents,alloc,load,load,data \
+                vmlinux vmlinux.tmp
+        $(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+                --add-section image=vmlinux.tmp \
+                --set-section-flags image=contents,alloc,load,load,data \
+                $(OBJS) $@.tmp
+        $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
+                -T arch/$(ARCH)/boot/boot-elf/boot.ld \
+                -o arch/$(ARCH)/boot/$@.elf $@.tmp
+        rm -f $@.tmp vmlinux.tmp
+
+
+zImage: Image
+
+zImage.initrd:  Image.initrd
+
diff --git a/arch/xtensa/boot/boot-elf/boot.ld b/arch/xtensa/boot/boot-elf/boot.ld
new file mode 100644
index 000000000000..4ab06a0a7a6b
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/boot.ld
@@ -0,0 +1,71 @@
+OUTPUT_ARCH(xtensa)
+
+SECTIONS
+{
+        .start 0xD0000000 : { *(.start) }
+
+        .text 0xD0000000:
+        {
+                __reloc_start = . ;
+                _text_start = . ;
+                *(.literal .text.literal .text)
+                _text_end = . ;
+        }
+
+        .rodata ALIGN(0x04):
+        {
+                *(.rodata)
+                *(.rodata1)
+        }
+
+        .data ALIGN(0x04):
+        {
+                *(.data)
+                *(.data1)
+                *(.sdata)
+                *(.sdata2)
+                *(.got.plt)
+                *(.got)
+                *(.dynamic)
+        }
+
+        __reloc_end = . ;
+
+        .initrd ALIGN(0x10) :
+        {
+                boot_initrd_start = . ;
+                *(.initrd)
+                boot_initrd_end = .;
+        }
+
+        . = ALIGN(0x10);
+        __image_load = . ;
+        .image 0xd0001000:
+        {
+                _image_start = .;
+                *(image)
+                . = (. + 3) & ~ 3;
+                _image_end = .  ;
+        }
+
+
+        .bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
+        {
+                __bss_start = .;
+                *(.sbss)
+                *(.scommon)
+                *(.dynbss)
+                *(.bss)
+                __bss_end = .;
+        }
+        _end = .;
+        _param_start = .;
+
+        .ResetVector.text 0xfe000020 :
+        {
+                *(.ResetVector.text)
+        }
+
+
+        PROVIDE (end = .);
+}
diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S
new file mode 100644
index 000000000000..7cba94abdab8
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -0,0 +1,37 @@
+
+#include <xtensa/config/specreg.h>
+#include <xtensa/config/core.h>
+
+#include <linux/config.h>
+#include <asm/bootparam.h>
+
+
+/* ResetVector
+ */
+        .section        .ResetVector.text, "ax"
+        .global         _ResetVector
+_ResetVector:
+        _j reset
+        .align 4
+RomInitAddr:
+        .word 0xd0001000
+RomBootParam:
+        .word _bootparam
+reset:
+        l32r    a0, RomInitAddr
+        l32r    a2, RomBootParam
+        movi    a3, 0
+        movi    a4, 0
+        jx      a0
+
+        .align 4
+        .section .bootstrap.data, "aw"
+
+        .globl _bootparam
+_bootparam:
+        .short  BP_TAG_FIRST
+        .short  4
+        .long   BP_VERSION
+        .short  BP_TAG_LAST
+        .short  0
+        .long   0