[coreboot] Strange postcodes

Łukasz Dobrowolski spectrallynx at gmail.com
Sun Aug 7 10:11:32 CEST 2016


Hello!
I'm porting cb to ThinkPad X120e. I've used code from asrock/e350m1 as
basis and made some small changes.

I'm getting following postcodes. Those are after "50" so romstage.c
finished executing. (System sometimes goes this far, other times it
hangs earlier.)
        79 24 98 7A A8 F8

I tried to find them in like this:
        grep -R 'post_code(0x24);'
I've only found "24", it's in device/pci_device.c:1113. Whatever is
sending the rest of the postcodes is not using post_code() function.

I can think of 3 explanations:
        Payload is sending those postcodes. -> Seams unlikely, I'm
using Seabios. I've read some of the code and can't find any places
that would send the codes.
        ASM parts of cb/AGESA.
        EC(ITE IT8518E) is sending the codes.

Any thoughts?



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