[U-Boot-Users] [PATCH v4] ppc: Add CFG_MEM_TOP_HIDE option to hide memory area that doesn't get "touched"

[Stefan Roese]

On Friday 28 March 2008, Kumar Gala wrote:
> > This patch enables this config option on some PPC440EPx boards as a
> > workaround
> > for the CHIP 11 errata. Here the description from the AMCC
> > documentation:
>
> If you reduce the memory size this way does the 44x kernel have issues
> with the TLBs that are used to mapped pin kernel lowmem?

Not that I am aware of. I tested arch/ppc and arch/powerpc kernel version 
without problems.

> I know on 85xx this would be a bad thing and rather than changing gd->
> ram_size, i'd add a memreserve in the device tree that the kernel
> got passed.

This way I have no chance to "fix" arch/ppc kernels too. I know, arch/ppc is 
dead. :) But we need to support it a little while longer.

Best regards,
Stefan

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