Pointers in FSP config?

[mr gadha]


I've  been poking around a bit more on system I'm attempting to port and started doing a detailed comparison between the FSP settings from the stock BIOS and what Coreboot is using.  In going through the FSP settings,  I'm noticing there are a few pointers to external tables that aren't very well documented.

For example, the CoffeeLake FSP  has "ChipsetInitBinPtr" / "ChipsetInitBinLen"   fields, but their documentation doesn't seem to say anything beyond the names.  Couldn't find any other code referencing these.

Anybody know what these are?

[Michał Żygowski]

Hi,

ChipsetInitBinary is something consumed by ME. You may find references
of it in the FITc/FIT/mFIT, where you can integrate that binary as a
part of ME image.

Intel distributes a separate toolkit to generate a ChipsetInitBinary.
Mostly the binary comprises of voltage settings for some pads and USB
tuning.

Apparently FSP can take an external ChipsetInitBinary to override the
settings from the integrated ChipsetInitBinary in the ME.

On 4/7/24 23:56, mr gadha via coreboot wrote:
> 
> I've  been poking around a bit more on system I'm attempting to port
> and started doing a detailed comparison between the FSP settings from
> the stock BIOS and what Coreboot is using.  In going through the FSP
> settings,  I'm noticing there are a few pointers to external tables
> that aren't very well documented.
>
> For example, the CoffeeLake FSP  has "ChipsetInitBinPtr" /
> "ChipsetInitBinLen"   fields, but their documentation doesn't seem to
> say anything beyond the names.  Couldn't find any other code
> referencing these.
>
> Anybody know what these are?
>
> coreboot mailing list -- [e-mail]
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Best regards,