Lennart Augustsson <augustss@cs.chalmers.se> writes:
> Sorry, I was just babbling without checking.  There are 6 BARs, but
> that doesn't change the fact that the SonicVibes card wants
> two additional I/O regions which are programmed at addresses 0x40 and 
> 0x48 in confuguration space.
> So the basic problem remains.

Ahh, in the device-dependent chunk of configuration space.  makes
sense.


> As has been pointed out, even delaying the allocation until after
> all other attachments have been done will guarantee that you
> can find free I/O space, but it's the best I've been able to come
> up with.

Yah, for now.

You notion of where things can be mapped isn't quite good enough, i
don't think.  for instance, if the card is behind a PPB, you need to
limit it to the space that the PPB is forwarding.

In general, we need a better way to do PCI bus reconfiguration
(i.e. BAR reprogramming), because more and more PCs aren't completely
configuring their PCI busses...

It's non-trivial to do it right, though.


cgd
--
Chris Demetriou - cgd@netbsd.org - http://www.netbsd.org/People/Pages/cgd.html
Disclaimer: Not speaking for NetBSD, just expressing my own opinion.