[U-Boot] [RFC PATCH 6/8] omap3_beagle: add nand_spl support

[Aneesh V]

On Wednesday 29 December 2010 05:56 AM, John Rigby wrote:
> On Mon, Dec 27, 2010 at 11:50 PM, Aneesh V<aneesh at ti.com>  wrote:
>> Hello John,
>>
>> On Tuesday 28 December 2010 06:17 AM, John Rigby wrote:
>> <  snip>
>>
>>> +LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds
>>> +LDFLAGS      = -Bstatic -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_NAND_SPL_TEXT_BASE) $(PLATFORM_LDFLAGS)
>>> +AFLAGS       += -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
>>> +CFLAGS       += -DCONFIG_PRELOADER -DCONFIG_NAND_SPL
>>
>> How big is the spl now? For the OMAP4 spl, using '-ffunction-sections'
>> and '--gc-sections' reduced the image size by 40% and helped it fit
>> into the SRAM bugdet. I am sure your nand_spl is already fitting in the
>> SRAM bugdet. But these flags may help reduce the size further. Do you
>> want to try it?
> It is about 12K.  I will try the additional flags and see what

That's impressive. I think you won't need those flags then. the MMC spl
for OMAP4 was much bigger(37 KB without --gc-sections and 22 KB with
--gc-sections). I think the main difference is that for MMC spl I am
using the u-boot MMC driver where as for nand spl you seem to be using
a driver tailor made for the spl.

BTW, Is there a good way to know the contribution of each file/function
to the final image size. I couldn't find any suitable option in 'ld'.
With RVCT this was much easier.