[coreboot] OliveHillPlus board GPP PCIe ports - No link before AGESA Calls.

[Marc Jones]

I think serial is to the southbridge and out to LPC. I don't know if there
is a working PCI serial device with the AGESA based systems.

Regards,
Marc


On Wed, Nov 8, 2017 at 9:28 AM Abhishek Chaudhary <abhi.cpp at gmail.com>
wrote:

> Hi Everyone,
>
> I am working  onAMD OliveHillPlus board that has AMD G-series - Steppe
> eagle (Mullins, Family 16h Model 30h-3Fh).
>
> I am running coreboot that calls AGESA APIs to initialize the platform.
>
> What i observed is the GPP PCIe ports (Device 2, Func 1,2,3,4)
> doesn't indicate link as active unless amdinitreset, amdinitearly,
> and amdinitpost calls are made.
>
> My question is, in Bootlog for OliveHillPlus has serail prints before any
> AGESA calls. Since serial port must be connected on GPP PCIe port and these
> ports are not active before first 3 AGESA calls, how serial port is able to
> communicate?
>
> When i connected a OXPCI serial card on mini PICe port that Coreboot
> supports, the serial card was not getting initialized by Coreboot.
>
> Is there some way to configure the PCIe ports early enough (before making
> any AGESA call)?
>
> Any inputs will be very helpful.
>
> Thanks,
> Abhishek.
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-- 
http://marcjonesconsulting.com
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