[coreboot] Chromebook coreboot sources

Aaron Durbin adurbin at chromium.org
Tue Nov 5 18:00:03 CET 2013

On Tue, Nov 5, 2013 at 10:55 AM, Kyösti Mälkki <kyosti.malkki at gmail.com> wrote:
> Hi
> A recent discussion I had about google/stout suggested that with the sources
> from coreboot git, this board is unable to resume from S3 suspend.
> (Argumentation: no EARLY_CBMEM_INIT, no MRC cache, no memory training
> results).
> I find it hard to believe this problem would affect production units and I
> tried to locate the sources where this is fixed from chromium git, without
> success.
> So this question pops on the surface once again: how do I track down, locate
> and download the specific revision of coreboot sources for a Chromebook
> production unit? I'd like to see fixes like this upstreamed to coreboot git.
> As a related topic: Sandy/ivybridge boards have some low-memory writes on S3
> resume, see use of CBMEM_RESUME_BACKUP and CBMEM_BOOT_MODE in romstage.c. Is
> there some argumentation why these writes are safe and do not corrupt OS
> memory?

It's my understanding that things are just lucky because Linux
reserves that low memory from its use.

> Regards,
>  Kyösti
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