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sh: romImage support V2

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This patch contains support for the romImage build target V2.

The resulting romImage file should be burned to rom
or flash and could be used as small boot loader.

Board code should keep their setup code in the file
romimage.h located in their mach include directory.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm
2009-07-29 15:04:05 +00:00
committed by Paul Mundt
parent fd78a76aef
commit 3c928320b2
6 changed files with 46 additions and 3 deletions
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2
arch/sh/Makefile
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@@ -195,7 +195,7 @@ libs-$(CONFIG_SUPERH32) := arch/sh/lib/ $(libs-y)
libs-$(CONFIG_SUPERH64) := arch/sh/lib64/ $(libs-y) libs-$(CONFIG_SUPERH64) := arch/sh/lib64/ $(libs-y)
BOOT_TARGETS = uImage uImage.bz2 uImage.gz uImage.lzma uImage.srec \ BOOT_TARGETS = uImage uImage.bz2 uImage.gz uImage.lzma uImage.srec \
zImage vmlinux.srec zImage vmlinux.srec romImage
PHONY += maketools $(BOOT_TARGETS) FORCE PHONY += maketools $(BOOT_TARGETS) FORCE
maketools: include/linux/version.h FORCE maketools: include/linux/version.h FORCE

11
arch/sh/boot/Makefile
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@@ -24,9 +24,9 @@ suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2 suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(CONFIG_KERNEL_LZMA) := lzma suffix-$(CONFIG_KERNEL_LZMA) := lzma
targets := zImage vmlinux.srec uImage uImage.srec uImage.gz uImage.bz2 uImage.lzma targets := zImage vmlinux.srec romImage uImage uImage.srec uImage.gz uImage.bz2 uImage.lzma
extra-y += vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma extra-y += vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma
subdir- := compressed subdir- := compressed romimage
$(obj)/zImage: $(obj)/compressed/vmlinux FORCE $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy) $(call if_changed,objcopy)
@@ -35,6 +35,13 @@ $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
$(obj)/compressed/vmlinux: FORCE $(obj)/compressed/vmlinux: FORCE
$(Q)$(MAKE) $(build)=$(obj)/compressed $@ $(Q)$(MAKE) $(build)=$(obj)/compressed $@
$(obj)/romImage: $(obj)/romimage/vmlinux FORCE
$(call if_changed,objcopy)
@echo ' Kernel: $@ is ready'
$(obj)/romimage/vmlinux: $(obj)/zImage FORCE
$(Q)$(MAKE) $(build)=$(obj)/romimage $@
KERNEL_MEMORY := 0x00000000 KERNEL_MEMORY := 0x00000000
ifeq ($(CONFIG_PMB_FIXED),y) ifeq ($(CONFIG_PMB_FIXED),y)
KERNEL_MEMORY := $(shell /bin/bash -c 'printf "0x%08x" \ KERNEL_MEMORY := $(shell /bin/bash -c 'printf "0x%08x" \

19
arch/sh/boot/romimage/Makefile Normal file
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@@ -0,0 +1,19 @@
#
# linux/arch/sh/boot/romimage/Makefile
#
# create an image suitable for burning to flash from zImage
#
targets := vmlinux head.o
OBJECTS = $(obj)/head.o
LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart
$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
$(obj)/piggy.o: $(obj)/vmlinux.scr arch/sh/boot/zImage FORCE
$(call if_changed,ld)

10
arch/sh/boot/romimage/head.S Normal file
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@@ -0,0 +1,10 @@
/*
* linux/arch/sh/boot/romimage/head.S
*
* Board specific setup code, executed before zImage loader
*/
.text
.global romstart
romstart:
#include <romimage.h>

6
arch/sh/boot/romimage/vmlinux.scr Normal file
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@@ -0,0 +1,6 @@
SECTIONS
{
.text : {
*(.data)
}
}

1
arch/sh/include/mach-common/romimage.h Normal file
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@@ -0,0 +1 @@
/* do nothing here by default */