Hello,

> Look at the pci domain code in XFree86 
> (xc/programs/Xserver/hw/xfree86/Domain.note). There is code to handle 
> multiple PCI host bridges and probe their address from the OS.
Yep, it looks at /proc/pci/something in Linux.

>  You may need to implement something in the NetBSD kernel to get the 
> correct mappings for each host bridge tough, as probing it from 
> userland is not  the right thing to do.
Exactly my point. It should probably be part of libpci - another 
ioctl() for /dev/pci<n> to find out where the IO space of the 
corresponding PCI bus is mapped to. Let's see what the kernel gurus 
think, this should be an issue on other architectures without intelish 
IO instructions ( like sparc ) too.

have fun
Michael