[coreboot] libpci accesses in CAR, I need a suggestion

Marc Jones marcj303 at gmail.com
Mon Aug 1 22:28:15 CEST 2011


On Mon, Aug 1, 2011 at 1:08 PM, Tadas Slotkus <devtadas at gmail.com> wrote:
> Hi, thank you both for the answers. I have studied libpci from
> libpayload and removed that device list generation with mallocs. Done a
> bunch of trial-error cleanup and now chipset enable and probing for
> flash works in ramstage's top of hardwaremain function with this line
> included:
>        x86_setup_mtrrs(36); //from cpu init routine
> see attached log: ramstage_with_mtrr.txt.
> Also attaching nonworking logs in romstage and ramstage.
> Now the question is how these mtrrs should be set in cache_as_ram.inc or
> maybe I'm totally wrong? :)

You will need the MTRR setup from CAR. You will want your code to
execute in the XIP area, so that it may be cashed. You may still have
stack/mem issues. That may be the first place you look for problems.
You may need to find a way to optimize for resources.



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