[U-Boot] [PATCH 3/6] arm: imx: Fix u-boot-with-nand-spl.imx target

[Marek Vasut]

Dear Benoît Thébaudeau,

> Dear Marek Vasut,
> 
> On Friday, April 19, 2013 6:10:52 AM, Marek Vasut wrote:
> > This target is currently concatenating u-boot SPL in imximage format
> > with u-boot.bin. The NAND SPL can load a raw binary, but the preffered
> > format with much less limitations is uImage format. Fix the target
> > so u-boot.bin is first converted into uImage format and only after
> > that is concatenated.
> 
> Please reword: This is not a fix, but an enhancement.
> 
> > Signed-off-by: Marek Vasut <marex at denx.de>
> > Cc: Albert ARIBAUD <albert.u.boot at aribaud.net>
> > Cc: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
> > Cc: Fabio Estevam <fabio.estevam at freescale.com>
> > Cc: Scott Wood <scottwood at freescale.com>
> > Cc: Stefano Babic <sbabic at denx.de>
> > Cc: Tom Rini <trini at ti.com>
> > ---
> > 
> >  arch/arm/imx-common/Makefile | 7 +++++--
> >  1 file changed, 5 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
> > index 44b6822..ba31d3e 100644
> > --- a/arch/arm/imx-common/Makefile
> > +++ b/arch/arm/imx-common/Makefile
> > @@ -69,8 +69,11 @@ $(OBJTREE)/u-boot-with-nand-spl.imx: $(OBJTREE)/SPL
> > $(OBJTREE)/u-boot.bin
> > 
> >  		-I binary -O binary $(OBJTREE)/spl/u-boot-nand-spl.imx \
> >  		$(OBJTREE)/spl/u-boot-nand-spl-pad.imx
> >  	
> >  	rm $(OBJTREE)/spl/u-boot-nand-spl.imx
> > 
> > -	cat $(OBJTREE)/spl/u-boot-nand-spl-pad.imx $(OBJTREE)/u-boot.bin > $@
> > -	rm $(OBJTREE)/spl/u-boot-nand-spl-pad.imx
> > +	$(OBJTREE)/tools/mkimage -A arm -O U-Boot -a $(CONFIG_SYS_TEXT_BASE) \
> > +		-e $(CONFIG_SYS_TEXT_BASE) -C none -d $(OBJTREE)/u-boot.bin \
> > +		$(OBJTREE)/u-boot.uim
> > +	cat $(OBJTREE)/spl/u-boot-nand-spl-pad.imx $(OBJTREE)/u-boot.uim > $@
> > +	rm $(OBJTREE)/spl/u-boot-nand-spl-pad.imx $(OBJTREE)/u-boot.uim
> > 
> >  ########################################################################
> >  #
> > 
> > --
> > 1.7.11.7
> 
> This change is correct.
> 
> I don't know the uImage format very well. Can you give examples of what
> this patch can bring compared to the raw binary format?
> 
> If this change is useful, it should probably be made for
> u-boot-with-spl.imx too.

Please see common/spl/spl_nand.c which calls spl_parse_image_header() on the 
payload loaded from NAND. This is implemented in common/spl/spl.c and if proper 
header is not found, the payload is assumed to be of 200kB of size, which is far 
less than fully configured U-Boot. So using the uimage format is much more 
flexible.

Best regards,
Marek Vasut