Re: Compaq ProLiant 1600 server freezes when detecting keyboard controller

From: John Baldwin <jhb_at_freebsd.org>
Subject: Re: Compaq ProLiant 1600 server freezes when detecting keyboard controller
Date: Mon, 21 Nov 2005 13:07:02 -0500

> On Sunday 20 November 2005 11:04 pm, M. Warner Losh wrote:
> > In message: <20051120042536.E72D816A421_at_hub.freebsd.org>
> >
> >             wpaul_at_freebsd.org (Bill Paul) writes:
> > : Our PCI code
> > : then comes along and enables all of the devices but doesn't necessarily
> > : update the base address registers on some of them, which has the effect
> > : of mapping one of the PCI devices at physical address 0.
> >
> > Actually, that bug has been fixed in recent versions of
> > FreeBSD-current, and should be fixed in 6.0.  I recall merging changes
> > to 6.0 just before the release.  The problem was that the host bridge
> > wasn't properly setting a range.  If that's not the case, then I'd
> > like to know about it...
> 
> No, the bug was fixed, but that wasn't the fix.  The fix was to bail out 
> earlier if a BAR's base was 0 and not enable IO or MEM decoding unless a BAR 
> had a valid base (where 0 and 0xfffffff are both invalid bases).

Ah, that's the other bug we fixed...

Warner