[coreboot] Source code for "Intel Firmware"

[Nico Huber]

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/