[coreboot] Chromebook coreboot sources

[Kyösti Mälkki]

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?

Regards,
  Kyösti