[U-Boot] BSS footprint of FAT very high - SPL issues

[Wolfgang Denk]

Dear Aneesh V,

In message <4D4798E2.3050500 at ti.com> you wrote:
> 
> I had been working on creating an MMC SPL for OMAP4. OMAP boards
> typically support booting from the FAT partition of a removable SD/MMC
> card. So, we need to have FAT support in the SPL. But I am having some
> difficulties in adding FAT support to SPL.
> 
> BSS footprint of fat.c is very high. It has three buffers each of size
> 64KB. To workaround this problem I have done something like below(The
> way x-loader works around this problem today).
> CONFIG_SYS_SPL_FAT_BUFFER_BASE is in SDRAM.Is this ok?

Why would that be necessary?  Just put the BSS segment in SDRAM, and
everything is fine, isn't it?

> Also, I was wondering why we need 3 such scratch buffers in this 
> implementation. I do not understand this code. But I was wondering if we 
> could work with just one 64K buffer?

I have no idea.   I am not familiar with that code either.

Best regards,

Wolfgang Denk

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