[coreboot] [PATCH] xcshell: serial shell for early debugging

[Carl-Daniel Hailfinger]

On 14.07.2009 11:23, Michael Gold wrote:
> I've been working on some code to ensure I can debug a system even if
> coreboot fails to boot an OS.  The attached patch adds this code to the
> tree:
>   - serialprobe watches the serial port for about a second, and boots
>     the system normally unless 32 consecutive null bytes are seen.
>   - xcshell allows the CPU to be controlled via the serial port, using
>     a binary protocol.
>
> The code assembles to about 1 KB, so it can be left in an image for
> emergency use.  It's also modular in case someone wants to use it with
> something other than a serial port.
>   

How does this relate to RemoteBIOS? AFAIK RemoteBIOS is explicitly
designed to be machine controllable even if CAR does not work.
http://linuxupc.upc.es/~urbez/RemoteBIOS.eng.html

Regards,
Carl-Daniel

-- 
http://www.hailfinger.org/