[coreboot] post_code to text file

Haleigh Novak haleigh at edt.com
Fri Dec 16 22:51:19 CET 2016

Thank you for the hint, I have 'installed' cbmem by making tthe appropriate menuconfig changes and in util/cbmem "$make LD_FLAGS=-static". Though (and I apologize for my nieve-ness) how exactly to I use the "$ cbmem -c" command, specifically wher exactly in boot/start up process should I call it- I cant call it from the OS, and I haven't been able to find anything on google relating to how to access coreboot userspace...

From: Idwer Vollering <vidwer at gmail.com>
Sent: Wednesday, December 14, 2016 5:46 PM
To: Haleigh Novak
Cc: coreboot at coreboot.org
Subject: Re: [coreboot] post_code to text file

cbmem, in util/cbmem/, should be what you are looking for.

2016-12-15 2:35 GMT+01:00 Haleigh Novak <haleigh at edt.com>:
> Hello All,
> I was wondering if it would be possible to add a few lines in the post_code
> method so it also writes all the codes to a text file and then keep that
> text file around so it could be read once the system is running - for
> debugging purposes because a post_code reader is currently unavailable to
> me. I know that the BIOS handles the post codes and my chosen BIOS is
> coreboot and I have added just a couple lines to the post code method right
> after mainboard_post() is called in order to print the codes to a file in /
> as well. But I don't have any idea how to pass a small text file along from
> coreboot up to yocto jethro during boot - is this even possible?
> Any comments, thoughts, ideas, guidance  would be greatly appriciated. Thank
> you.
> HN
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