[coreboot] Hardware diagnostic

[yanvasilij yan]

Thank lot too all!

Sory for last response!

You were right, the problem was in power up sequence. After fixing all
become correct. The 0x8086/0x0000 device disappeared, and payload
succesfuly downloaded.

Peter Stuge,  thank you for detailed comments!

Nico Huber, thank you for active participation!



вс, 28 окт. 2018 г. в 4:18, Nico Huber <nico.h at gmx.de>:

> On 10/28/18 12:25 AM, Peter Stuge wrote:
> > Why are there no RAM regions? I don't know.
>
> Quite simple, because the code that adds them is tied to 8086:0f00.
>
> >> nico_h in the IRC chat noticed that in non-working board appears a
> starnge
> >> device with vid/did PCI: 00:00.0 [8086/0000].
> >
> > The 0000 is a HUGE red sign, screaming to be thoroughly investigated.
> >
> > This also hints that the power up changes may be the problem.
>
> I agree, but note that in the datasheet (or EDS at least), the DID is
> not read-only. A strap (that I coudn't find more about) is supposed to
> set the initial value plus there is a message mentioned (to be sent to
> sth. I didn't look into) that may change it.
>
> So alternatively to diagnosing the hardware changes, you could also
> follow the bread crumbs in the documentation.
>
> Nico
>
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