[coreboot] Source code for "Intel Firmware"

[Zvi Vered]

Hi Nico,

Thank you very much for the information.

Best regards,
Zvika
On Sat, Oct 6, 2018 at 6:18 PM Nico Huber <nico.h at gmx.de> wrote:
>
> On 10/6/18 2:46 PM, Zvi Vered wrote:
> > Hello Nathaniel, Nico,
> >
> > Thank you very much for the detailed answers.
> >
> > The vendor's bin file starts with the following pattern:
> > 00000000:  FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF
> > 00000010:  5AA5F00F 03000402   0602100B  20002100
> >
> > Can you confirm that this is the start of IFD ?
>
> Yes, it is (at least the first 20B are distinctive).
>
> There is not much public documentation about it ([1] is all I know)
> but you might find something less public with Google [2]. There's also
> a lot of open-source code of programs that can parse it [3][4]. Code
> is usually more accurate than documentation but it explains less about
> the configuration bits. You'll have to ask Intel for the SPI Program-
> ming Guide for your particular platform if you want to fully under-
> stand it and craft your own.
>
> Nico
>
> [1]
> https://review.coreboot.org/cgit/flashrom.git/plain/Documentation/mysteries_intel.txt
> [2] "Intel" "SPI" "Programming Guide" *cough
> [3] https://review.coreboot.org/cgit/flashrom.git/tree/ich_descriptors.c
> [4] https://review.coreboot.org/cgit/coreboot.git/tree/util/ifdtool/