Patchwork [v3] SPARC: added U-Boot build target: uImage

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Submitter Daniel Hellstrom
Date Jan. 26, 2011, 4:36 p.m.
Message ID <1296059795-22807-1-git-send-email-daniel@gaisler.com>
Download mbox | patch
Permalink /patch/80522/
State Accepted
Delegated to: David Miller
Headers show

Comments

Daniel Hellstrom - Jan. 26, 2011, 4:36 p.m.
This is only for LEON as u-boot for SPARC only supports LEON.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
---
 arch/sparc/Kconfig       |   33 +++++++++++++++++++++++++++++++++
 arch/sparc/Makefile      |    3 ++-
 arch/sparc/boot/Makefile |   31 +++++++++++++++++++++++++++++++
 3 files changed, 66 insertions(+), 1 deletions(-)
Sam Ravnborg - Jan. 26, 2011, 8:10 p.m.
On Wed, Jan 26, 2011 at 05:36:35PM +0100, Daniel Hellstrom wrote:
> This is only for LEON as u-boot for SPARC only supports LEON.
> 
> Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

Looks good.
Acked-by: Sam Ravnborg <sam@ravnborg.org>

A general note about patch subjects.

I have started to use the following conventions for
patch subjects:

sparc: bla         <= stuff that is relevant for sparc32 and sparc64
sparc32: bla       <= sparc32 specific stuff 
sparc64: bla       <= sparc64 specific stuff
sparc32,leon: bla  <= leon specific stuff (on sparc32)
sparc32,sun4m: bla <= sun4m specific stuff (on sparc32)

I try to find something useful as "bla" - this is sometimes defficult..

If I could convince you to use same syntax we could get
a bit more consistency in the patch subjects.

And if not then no big deal!

	Sam
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Patch

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 13d2b67..e48f471 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -461,6 +461,39 @@  config SPARC_LEON
 	  from www.gaisler.com. You can download a sparc-linux cross-compilation
 	  toolchain at www.gaisler.com.
 
+if SPARC_LEON
+menu "U-Boot options"
+
+config UBOOT_LOAD_ADDR
+	hex "uImage Load Address"
+	default 0x40004000
+	---help---
+	 U-Boot kernel load address, the address in physical address space
+	 where u-boot will place the Linux kernel before booting it.
+	 This address is normally the base address of main memory + 0x4000.
+
+config UBOOT_FLASH_ADDR
+	hex "uImage.o Load Address"
+	default 0x00080000
+	---help---
+	 Optional setting only affecting the uImage.o ELF-image used to
+	 download the uImage file to the target using a ELF-loader other than
+	 U-Boot. It may for example be used to download an uImage to FLASH with
+	 the GRMON utility before even starting u-boot.
+
+config UBOOT_ENTRY_ADDR
+	hex "uImage Entry Address"
+	default 0xf0004000
+	---help---
+	 Do not change this unless you know what you're doing. This is
+	 hardcoded by the SPARC32 and LEON port.
+
+	 This is the virtual address u-boot jumps to when booting the Linux
+	 Kernel.
+
+endmenu
+endif
+
 endmenu
 
 menu "Bus options (PCI etc.)"
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index 113225b..ad1fb5d 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -88,7 +88,7 @@  boot := arch/sparc/boot
 # Default target
 all: zImage
 
-image zImage tftpboot.img vmlinux.aout: vmlinux
+image zImage uImage tftpboot.img vmlinux.aout: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
 archclean:
@@ -102,6 +102,7 @@  ifeq ($(ARCH),sparc)
 define archhelp
   echo  '* image        - kernel image ($(boot)/image)'
   echo  '* zImage       - stripped kernel image ($(boot)/zImage)'
+  echo  '  uImage       - U-Boot SPARC32 Image (only for LEON)'
   echo  '  tftpboot.img - image prepared for tftp'
 endef
 else
diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
index a2c5898..9205416 100644
--- a/arch/sparc/boot/Makefile
+++ b/arch/sparc/boot/Makefile
@@ -5,6 +5,7 @@ 
 
 ROOT_IMG	:= /usr/src/root.img
 ELFTOAOUT	:= elftoaout
+MKIMAGE 	:= $(srctree)/scripts/mkuboot.sh
 
 hostprogs-y	:= piggyback btfixupprep
 targets		:= tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
@@ -77,6 +78,36 @@  $(obj)/zImage: $(obj)/image
 $(obj)/vmlinux.aout: vmlinux FORCE
 	$(call if_changed,elftoaout)
 	@echo '  kernel: $@ is ready'
+else
+
+# The following lines make a readable image for U-Boot.
+#  uImage   - Binary file read by U-boot
+#  uImage.o - object file of uImage for loading with a
+#             flash programmer understanding ELF.
+
+OBJCOPYFLAGS_image.bin := -S -O binary -R .note -R .comment
+$(obj)/image.bin: $(obj)/image FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/image.gz: $(obj)/image.bin
+	$(call if_changed,gzip)
+
+quiet_cmd_uimage = UIMAGE  $@
+      cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A sparc -O linux -T kernel \
+               -C gzip -a $(CONFIG_UBOOT_LOAD_ADDR) \
+	       -e $(CONFIG_UBOOT_ENTRY_ADDR) -n 'Linux-$(KERNELRELEASE)' \
+               -d $< $@
+
+quiet_cmd_uimage.o = UIMAGE.O $@
+      cmd_uimage.o = $(LD) -Tdata $(CONFIG_UBOOT_FLASH_ADDR) \
+                     -r -b binary $@ -o $@.o
+
+targets += uImage
+$(obj)/uImage: $(obj)/image.gz
+	$(call if_changed,uimage)
+	$(call if_changed,uimage.o)
+	@echo '  Image $@ is ready'
+
 endif
 
 $(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback System.map $(ROOT_IMG) FORCE