[coreboot] minimum linuxbios

Mark Marshall mark.marshall at csr.com
Tue Jul 6 11:53:17 CEST 2010

Masoud Fatollahy wrote:
>  Hi,
> I am working to make a minimal linuxbios without any payload or linux 
> kernel, I just want to see a nice hello word string on the serial port 
> and nothing else. is it possible to make such a bios? also to setup only 
> the necessary HW registers and memory to see the printout message.
> how should i do this?

Look at SerialICE:


This is a mini monitor that runs over the serial port.  The coreboot
developers use it to step through a BIOS image, but it contains
just enough to get the serial port working.  Memory is not
initialized, so everything is done with registers.


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