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Project ideas #451
openFix POST code handling
Start date:
01/29/2023
Due date:
% Done:
0%
Estimated time:
350.00 h
Description
coreboot supports writing POST codes to I/O port 80. There are various Kconfigs that deal with POST codes, which don’t have effect on most platforms. The code to send POST codes is scattered in C and Assembly, some use functions, some use macros and others simply use the outb
instruction. The POST codes are duplicated between stages and aren’t documented properly.
Tasks¶
- Guard Kconfigs with a depends on to only show on supported platforms
- Remove duplicated Kconfigs
- Replace
outb(0x80, ...)
with calls topost_code(...)
- Update Documentation/POSTCODES
- Use defines from console/post_codes.h where possible
- Drop duplicated POST codes
- Make use of all possible 255 values
Requirements¶
- Knowledge in the coreboot build system and the concept of stages
- Other knowledge: Little experience with C and x86 Assembly
- Hardware requirements: Nothing special
Mentors¶
- Patrick Rudolph patrick.rudolph@9elements.com
- Christian Walter christian.walter@9elements.com
Files
Updated by Felix Singer over 1 year ago
- Tracker changed from Bug to Project ideas
Updated by Anonymous over 1 year ago
Martin started another discussion regarding POST codes with the "coreboot postcode cleanup proposal" thread.
(I'm not sure if this is the best link):
https://mail.coreboot.org/hyperkitty/list/coreboot@coreboot.org/thread/UQM7Y66KO3RVLJ2OFC7S6KJX7TKKHY3V/#UQM7Y66KO3RVLJ2OFC7S6KJX7TKKHY3V
Updated by Alexander Goncharov over 1 year ago
Just in case, I attach my unselected GSoC project proposal on this topic
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