Hi Sam,
On Wed, 5 Jan 2011 20:19:15 0100, Sam Ravnborg wrote:
Hi Daniel.
>
> On Wed, Jan 05, 2011 at 11:42:40AM 0100, Daniel Hellstrom wrote:
> > This is only for LEON as u-boot for SPARC only supports LEON.
> >
> > Signed-off-by: Daniel Hellstrom <daniel@xxxxxxxxxxx>
> > ---
> > arch/sparc/Makefile | 3 -
> > arch/sparc/boot/Makefile | 36
> > 2 files changed, 38 insertions( ), 1 deletions(-)
> >
> > diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
> > index 113225b..012d289 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/LEON Image'
> > echo ' tftpboot.img - image prepared for tftp'
> > endef
> > else
> > diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
> > index 97e3feb..9574958 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_32 piggyback_64 btfixupprep
> > targets := tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
> > @@ -90,5 91,40 @@ $(obj)/tftpboot.img: $(obj)/image
$(obj)/piggyback_64 System.map $(ROOT_IMG) FOR
> > $(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)
> >
> > # Start of Main memory which this Linux kernel will be loaded to.
> > ifndef UIMAGE_LOADADDR
> > UIMAGE_LOADADDR=0x40004000
> > endif
> >
>
> Rather than hardcoding such addresses in the Makefile could
> we come up with something so we get board support
> included in the KConfig files?
Â
Of course, however is that really good, I mean we don't want to
rebuild the kernel just to change the load location. One kernel may end
up at different addresses at different boards...
Â
It is not really hardcoded, it is just the default address, one can
override the defualt address by adding a define at the make line, for
example:
$ make ARCH=sparc CROSS_COMPILE=sparc-linux-
UIMAGE_LOADADDR=0x00004000 uImage
Â
>
> I for once would love to be able to select
> "GR-LEON4-ITX" in Kconfig and then everything is
> set correct up concerning LOADADDR for uimage.
Â
There are very many different boards to support, that is a lot of job
maintaining, I'm not sure we want to go there. Note that the LEON is a
SoC and that there a lot of different chips, and a lot of different
boards... Why the LEON3 port works without a BSP between the different
chips/boards are thanks to Plug&Play at the processor local bus... The
standard location of all LEON3 is basically 0x40004000 or 0x60004000
(if two memory interfaces are supported), I can only think of one chip
that has this different.
Â
>
> Same goes for the start address which is hardcoded to 0xf0004000.
>
> I looked briefly at the other archs but did not find a good one
> to copy this from.
>
>
> > # The first sector after the U-Boot image (512k). Override this
accoring to
> > # your u-boot binary size and FLASH block size.
> > ifndef UIMAGE_FLASHADDR
> > UIMAGE_FLASHADDR=0x00080000
> > endif
> >
> > quiet_cmd_uimage = UIMAGE $@
> > cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A sparc -O linux
-T kernel \
> > -C gzip -a $(UIMAGE_LOADADDR) -e 0xf0004000 -n
'Linux-$(KERNELRELEASE)' \
> > -d $< $@
> >
> > targets = uImage
> > $(obj)/uImage: $(obj)/image.gz
> > $(call if_changed,uimage)
> > sparc-linux-ld -Tdata $(UIMAGE_FLASHADDR) -r -b binary
arch/sparc/boot/uImage -o arch/sparc/boot/uImage.o
> > @echo ' Image $@ is ready'
>
> What is the purpose of uImage.o?
The uImage is readable by u-boot and can be loaded into memory by
U-BOOT, however sometimes is easier to load the uImage image directly
into RAM/FLASH using a tool such as GRMON/TSIM/GRSIM. So the uImage.o
is an ELF image ready to be loaded into memory using a debugger of some
sort, just for convenience when networking isn't available for u-boot
or when a system is first time programmed before shipping...
Â
> At least sh does not have it - but thay have a lot of other U-boot targets.
> And can we fix is so we get a nice display when the command is executed?
Â
what do you what to be printed? is another echo enough?
Â
Best Regards,
Daniel
Â
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