Re: [OpenBIOS] PCI enumeration?

Chong Chee Yong  wrote:
> > (this is all defined in the PCI spec)  To scan the PCI bus, you
> > basically iterate through each slot, reading the device and vendor ids. 
> > If the slot is empty you get a nonexistent value (either 0 or 0xffff I
> > think).  There can also be bridges on the PCI bus, so you must
> > recursively descending into those, and scan their devices, as well.
>
> Haven't read the PCI bridges specs, but it seems that it is possible
> for two unconnected PCI bus since the algorithm suggested in revision 2.2
> Chapter 6.1 is to scan all possible slots.

I believe that this (or something similar) has been implemented on some
newer Compaq servers. There are a number of workarounds in the kernel PCI code.

If someone has access to one of these, an lspci -xxx output would make
interesting reading.

regards,