[U-Boot] skylake fsp

[Bin Meng]

Hi Christian,

On Fri, Apr 13, 2018 at 4:50 PM, Christian Gmeiner
<christian.gmeiner at gmail.com> wrote:
> Hi all
>
> Currently I am trying to get the skylake fsp working with u-boot but I run
> into some issues:
>
> 1) I see the postcode POST_BIST_FAILURE triggered in car_init
>
> I am not sure how this could happen and I am not sure from where the BIST
> value comes from. I can see the following call chain
>
>  start16(..)
>  _start(..)
>  car_init(..)

The BIST value is in register eax. See below in start.S

/* Save BIST */
65        movl    %eax, %ebp

Then ebp's value will be tested in fsp_car.S

If you get this error, that means your processor does not power up correctly.

>
> 2) If I remove that check the last post code I see is POST_PRE_MRC
>
> It looks like fsp_init(..) gets called and hags.
>
> I am thankful for every hint I could get. In the meantime I will have
> a deeper look
> at the coreboot sources.
>

Well, there are many possible causes. Please check your FSP UPD
configuration. If you pass something wrong, the FSP won't boot up.

Good luck!

Regards,
Bin