[coreboot] Questions about how to record hardware information on ARM

Stefan Reinauer stefan.reinauer at coreboot.org
Tue Jul 26 19:25:34 CEST 2011


* Hamo <hamo.by at gmail.com> [110726 11:05]:
> Hi lists,
> As I have moved forward to writing the ramstage, much more problems came out.
> PCI devices are just extra devices that can be used but not key
> devices like those on X86. Most devices on ARM are connected through
> AHBA bus and can be configured by reading and writing data from and
> into the control registers. So we need a new way to record the
> information of hardware instead of depending on the enumerate and init
> functions of PCI devices.

Devices that can not be probed have to be put in the static device
tree. Coreboot has support for a number of those, SuperIOs for example.

> This is hard for me since the format we are using to record
> information is highly depending on PCI bus. We need to design a new
> format for ARM.
 
Really? Why is the current format not sufficient?

Stefan





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