From: Magnus Damm <magnus.damm@gmail.com>
To: linux-sh@vger.kernel.org
Subject: [PATCH] sh: romImage support
Date: Wed, 29 Jul 2009 12:49:42 +0000 [thread overview]
Message-ID: <20090729124942.3344.84856.sendpatchset@rx1.opensource.se> (raw)
From: Magnus Damm <damm@igel.co.jp>
This patch adds support for the romImage build target.
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>
---
arch/sh/Makefile | 2 +-
arch/sh/boot/Makefile | 11 +++++++++--
arch/sh/boot/romimage/Makefile | 31 +++++++++++++++++++++++++++++++
arch/sh/boot/romimage/head_32.S | 18 ++++++++++++++++++
arch/sh/boot/romimage/head_64.S | 11 +++++++++++
arch/sh/include/mach-common/romimage.h | 1 +
6 files changed, 71 insertions(+), 3 deletions(-)
--- 0001/arch/sh/Makefile
+++ work/arch/sh/Makefile 2009-07-29 20:36:36.000000000 +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 $(BOOT_TARGETS) FORCE
maketools: include/linux/version.h FORCE
--- 0001/arch/sh/boot/Makefile
+++ work/arch/sh/boot/Makefile 2009-07-29 20:36:36.000000000 +0900
@@ -24,9 +24,9 @@ suffix-$(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)/compressed/vmlinux FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/romimage $@
+
KERNEL_MEMORY := 0x00000000
ifeq ($(CONFIG_PMB_FIXED),y)
KERNEL_MEMORY := $(shell /bin/bash -c 'printf "0x%08x" \
--- /dev/null
+++ work/arch/sh/boot/romimage/Makefile 2009-07-29 20:36:36.000000000 +0900
@@ -0,0 +1,31 @@
+#
+# linux/arch/sh/boot/romimage/Makefile
+#
+# create an image suitable for burning to flash from zImage
+#
+
+targets := vmlinux head_$(BITS).o
+
+OBJECTS = $(obj)/head_$(BITS).o
+
+#
+# IMAGE_OFFSET is the load offset of the compression loader
+#
+IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
+ $$[$(CONFIG_PAGE_OFFSET) + \
+ $(KERNEL_MEMORY) + \
+ $(CONFIG_BOOT_LINK_OFFSET)]')
+
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+ifeq ($(CONFIG_MCOUNT),y)
+ORIG_CFLAGS := $(KBUILD_CFLAGS)
+KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
+endif
+
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_OFFSET) -e romstart \
+ -T $(obj)/../../kernel/vmlinux.lds
+
+$(obj)/vmlinux: $(OBJECTS) arch/sh/boot/compressed/vmlinux $(LIBGCC) FORCE
+ $(call if_changed,ld)
+ @:
--- /dev/null
+++ work/arch/sh/boot/romimage/head_32.S 2009-07-29 20:45:52.000000000 +0900
@@ -0,0 +1,18 @@
+/*
+ * linux/arch/sh/boot/romimage/head_32.S
+ *
+ * Board specific setup code, executed before zImage loader
+ */
+
+.text
+ .global romstart
+romstart:
+#include <romimage.h>
+ mov.l startup_addr, r0
+ jmp @r0
+ nop
+
+ .align 2
+startup_addr:
+ .long startup
+ .align 0
--- /dev/null
+++ work/arch/sh/boot/romimage/head_64.S 2009-07-29 20:46:55.000000000 +0900
@@ -0,0 +1,11 @@
+/*
+ * linux/arch/sh/boot/romimage/head_64.S
+ *
+ * Board specific setup code, executed before zImage loader
+ */
+
+.text
+ .global romstart
+romstart:
+#include <romimage.h>
+#warning "64-bit implementation needs more work"
--- /dev/null
+++ work/arch/sh/include/mach-common/romimage.h 2009-07-29 20:36:36.000000000 +0900
@@ -0,0 +1 @@
+/* do nothing here by default */
reply other threads:[~2009-07-29 12:49 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090729124942.3344.84856.sendpatchset@rx1.opensource.se \
--to=magnus.damm@gmail.com \
--cc=linux-sh@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox