[coreboot] Chromebook coreboot sources

Stefan Reinauer stefan.reinauer at coreboot.org
Tue Nov 5 19:52:40 CET 2013

* Aaron Durbin <adurbin at chromium.org> [131105 18:00]:
> 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.

Last I checked that memory was marked reserved by coreboot, so Linux
should not use it. Did this change?


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