[U-Boot] [PATCH v4 10/11] Add u-boot-pad.bin target to the Makefile

[Scott Wood]

On 09/19/2012 06:31:29 PM, Tom Rini wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 09/19/12 15:39, Scott Wood wrote:
> > On 09/19/2012 06:25:26 AM, José Miguel Gonçalves wrote:
> >> Samsung's S3C24XX SoCs need this in order to generate a binary
> >> image with a padded SPL concatenated with U-Boot.
> >>
> >> Signed-off-by: José Miguel Gonçalves <jose.goncalves at inov.pt>
> >> --- Changes for v2: - None
> >>
> >> Changes for v3: - Changed new binary target name from
> >> u-boot-ubl.bin to u-boot-pad.bin
> >>
> >> Changes for v4: - None --- Makefile |   11 ++++++----- 1 file
> >> changed, 6 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/Makefile b/Makefile index 8738d55..86dedca 100644
> >> --- a/Makefile +++ b/Makefile @@ -433,14 +433,15 @@
> >> $(obj)u-boot.sha1:    $(obj)u-boot.bin $(obj)u-boot.dis:
> >> $(obj)u-boot $(OBJDUMP) -d $< > $@
> >>
> >> -$(obj)u-boot.ubl:       $(obj)spl/u-boot-spl.bin
> >> $(obj)u-boot.bin +$(obj)u-boot-pad.bin:
> >> $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin $(OBJCOPY) ${OBJCFLAGS}
> >> --pad-to=$(PAD_TO) -O binary $(obj)spl/u-boot-spl
> >> $(obj)spl/u-boot-spl-pad.bin -        cat
> >> $(obj)spl/u-boot-spl-pad.bin $(obj)u-boot.bin >
> >> $(obj)u-boot-ubl.bin -        $(obj)tools/mkimage -n
> >> $(UBL_CONFIG) -T ublimage \ -        -e $(CONFIG_SYS_TEXT_BASE)
> >> -d $(obj)u-boot-ubl.bin $(obj)u-boot.ubl -        rm
> >> $(obj)u-boot-ubl.bin +        cat $(obj)spl/u-boot-spl-pad.bin
> >> $(obj)u-boot.bin > $(obj)u-boot-pad.bin rm
> >> $(obj)spl/u-boot-spl-pad.bin
> >
> > This rule lists u-boot-spl.bin as a prerequisite, but it doesn't
> > appear to use it -- it uses u-boot-spl instead.
> >
> > It seems that either spl/Makefile should produce u-boot-spl rather
> > than u-boot-spl.bin and let the toplevel Makefile deal with
> > converting it to a binary, or spl/Makefile should take care of
> > adding any needed padding for the target and the final rule should
> > just be a concatenation.
> 
> So, if we use a weak PAD_TO value of say 0x1, we could always "pad"
> u-boot-spl.bin out and then do the concatenation here and in a few
> other targets as well.

Yes, or use a variable that includes the linker option, so that it  
expands to an empty string if padding isn't required.

-Scott