[coreboot] SuperIO question

jorgefm at cirsa.com jorgefm at cirsa.com
Fri Jul 31 08:57:33 CEST 2009

> Hi Jorge,

Hi Carl-Daniel, thanks for your kick answer!

> > I'm developing a little hardware module with a w83627hf superio 
> > This hardware is attached to a com express module. I've found that my 
> > hardware is not always initialized
> > by the com express BIOS, it depends on the manufacter.
> > [...]
> > Then, I think that the hardware is working but I need some 
> > in the southbridge or something
> > else that the first BIOS is doing. Where can I looking for this info? 
> > com express modules has the intel ICH7-M southbridge.
> > 
> I'd say the best way forward is to diagnose this with the help of
> superiotool. Make sure the w83627hf kernel module is not loaded
> automatically, then run superiotool -dV and compare the outputs. If
> superiotool finds your SuperIO only on one of the boards, you most
> likely have a southbridge resource configuration problem which needs to
> be addresses by the BIOS manufacturer (or a custom early kernel driver).

I'm very interested in the steps the BIOS takes in order to do the 
resource configuration. Can you point me to the coreboot files where these
steps are done, specifically I'm interested in the ICH7-M chipset, the one 

present in all my com express modules, and the steps to initialize the
superio hardware monitor.

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