sh: romImage support V2

Commit Message

Magnus Damm July 29, 2009, 3:04 p.m. UTC

From: Magnus Damm <[e-mail]>

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 <[e-mail]>
---

 arch/sh/Makefile                       |    2 +-
 arch/sh/boot/Makefile                  |   11 +++++++++--
 arch/sh/boot/romimage/Makefile         |   19 +++++++++++++++++++
 arch/sh/boot/romimage/head.S           |   10 ++++++++++
 arch/sh/boot/romimage/vmlinux.scr      |    6 ++++++
 arch/sh/include/mach-common/romimage.h |    1 +
 6 files changed, 46 insertions(+), 3 deletions(-)

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Comments

Paul Mundt Aug. 4, 2009, 5:44 a.m. UTC | #1

On Thu, Jul 30, 2009 at 12:04:05AM +0900, Magnus Damm wrote:
> 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.

On Thu, Jul 30, 2009 at 12:06:15AM +0900, Magnus Damm wrote:
> This patch is romImage support for the kfr2r09 board V2.
> 
> The partner-jet-setup.txt file is converted into assembly code
> which becomes the first code to execute from the reset vector.
> 
> The file partner-jet-setup.txt can also be used to setup
> the hardware using a JTAG debugger so booting from RAM can
> be done without burning the code to flash.

On Fri, Jul 31, 2009 at 03:57:36PM +0900, Magnus Damm wrote:
> This patch adds hwblk support for the sh7724 processor.

On Fri, Jul 31, 2009 at 04:01:36PM +0900, Magnus Damm wrote:
> This patch removes the unused MSTPCRn register definitions
> from the SuperH Mobile code for sh7722, sh7723 and sh7724.

These are all applied.
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Patch

--- 0001/arch/sh/Makefile
+++ work/arch/sh/Makefile	2009-07-29 22:59:44.000000000 +0900
@@ -195,7 +195,7 @@  libs-$(CONFIG_SUPERH32)		:= arch/sh/lib/
 libs-$(CONFIG_SUPERH64)		:= arch/sh/lib64/ $(libs-y)
 
 BOOT_TARGETS = uImage uImage.bz2 uImage.gz uImage.lzma uImage.srec \
-	       zImage vmlinux.srec
+	       zImage vmlinux.srec romImage
 PHONY += maketools $(BOOT_TARGETS) FORCE
 
 maketools:  include/linux/version.h FORCE
--- 0001/arch/sh/boot/Makefile
+++ work/arch/sh/boot/Makefile	2009-07-29 23:45:42.000000000 +0900
@@ -24,9 +24,9 @@  suffix-$(CONFIG_KERNEL_GZIP)  := gz
 suffix-$(CONFIG_KERNEL_BZIP2) := bz2
 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
-subdir- := compressed
+subdir- := compressed romimage
 
 $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
 	$(call if_changed,objcopy)
@@ -35,6 +35,13 @@  $(obj)/zImage: $(obj)/compressed/vmlinux
 $(obj)/compressed/vmlinux: FORCE
 	$(Q)$(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 $@
+
 KERNEL_MEMORY := 0x00000000
 ifeq ($(CONFIG_PMB_FIXED),y)
 KERNEL_MEMORY := $(shell /bin/bash -c 'printf "0x%08x" \
--- /dev/null
+++ work/arch/sh/boot/romimage/Makefile	2009-07-29 23:45:42.000000000 +0900
@@ -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)
--- /dev/null
+++ work/arch/sh/boot/romimage/head.S	2009-07-29 22:59:44.000000000 +0900
@@ -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>
--- /dev/null
+++ work/arch/sh/boot/romimage/vmlinux.scr	2009-07-29 23:45:42.000000000 +0900
@@ -0,0 +1,6 @@ 
+SECTIONS
+{
+  .text : {
+	*(.data)
+	}
+}
--- /dev/null
+++ work/arch/sh/include/mach-common/romimage.h	2009-07-29 22:59:44.000000000 +0900
@@ -0,0 +1 @@ 
+/* do nothing here by default */