cvs commit: src/sys/dev/pci pci_pci.c

[Warner Losh]

From: Bernd Walter <ticso at cicely12.cicely.de>
Subject: Re: cvs commit: src/sys/dev/pci pci_pci.c
Date: Fri, 18 Feb 2005 22:46:55 +0100

> On Fri, Feb 18, 2005 at 05:35:03PM +0000, Warner Losh wrote:
> > imp         2005-02-18 17:35:03 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     sys/dev/pci          pci_pci.c 
> >   Log:
> >   For the I/O port case, we need to set ok to 1 if we have what looks
> >   like a valid range.  We already do this in the memory case (although
> >   the code there is somewhat different than the I/o case because we have
> >   to deal with different kinds of memory).  Since most laptops don't
> >   have non-subtractive bridges, this wasn't seen in practice.
> 
> Does that mean we do check ranges on pci bridges?

Yes.  And we have been for a long time.

> I can remember having troubles with alpha systems where io ranges in
> PCI chips behind PCI-PCI bridges looked valid by themself, but in fact
> no IO range is configured on bridges.

Yes.  And we've been dealing with the newer subtractively decoded
bridges for a long time as well too :-)

long time == since before 5.3 :-)

Warner