Date: Mon, 24 Jun 2002 12:21:43 -0700 From: Peter Wemm <peter@wemm.org> To: mjacob@feral.com Cc: Andrew Gallatin <gallatin@cs.duke.edu>, "M. Warner Losh" <imp@village.org>, ticso@cicely.de, alpha@FreeBSD.ORG Subject: Re: Wither the nexus driver? Message-ID: <20020624192143.D220C380E@overcee.wemm.org> In-Reply-To: <Pine.BSF.4.21.0206241101160.94821-100000@beppo>
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Matthew Jacob wrote:
>
> note that on 8X00 and 4100 systems that the PCI chipset is *not* the root
> nexus (or shouldn't be)
[..]
> This is has always been a peeve of mine about *BSD usage of root 'nexus'- the
> assumption that the PCI chipset is the one and only nexus.
Logically, shouldn't the "nexus" be the cpu's backplane?
ie:
root -> cpu -> nexus -+-> hostpci -> ....
+-> otherbus etc
> On Mon, 24 Jun 2002, Andrew Gallatin wrote:
> > M. Warner Losh writes:
> > > In message: <20020623233355.GE53233@cicely5.cicely.de>
> > > Bernd Walter <ticso@cicely5.cicely.de> writes:
> > > : root node is the chipset:
> > > : [67]cicely9# devinfo
> > > : cia0
> > >
> > > OK. Is cia the only chipset, or are there others?
> >
> > There are many more.
> >
> > apecs, dwlpx, irongate, lca, mcpcia, t2, tsunami.
> > And I'm probably leaving a few out.
> >
> > Drew
Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5
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