[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