Re: MTRR type AMD Duron/intel ?
H. Peter Anvin (hpa@zytor.com)
15 Jan 2001 13:44:00 -0800
Followup to: <Pine.LNX.4.10.10101151151080.6408-100000@penguin.transmeta.com>
By author: Linus Torvalds <torvalds@transmeta.com>
In newsgroup: linux.dev.kernel
>
> On Mon, 15 Jan 2001, Tobias Ringstrom wrote:
> >
> > Last time I checked this was issued for perfectly known and valid bridges
> > that advertice no IO resources. Isn't it a bit silly to issue that
> > warning for that case, or am I missing something?
>
> Ehh - so what do they bridge, then?
>
> I'd say that a bridge that doesn't seem to bridge any IO or MEM region,
> yet has stuff behind it, THAT is the silly thing. Thus the "silly"
> warning.
>
What kind of bridge? Depending on the kind of bridge, it could be a
subtractive-decoding bridge; or it could be a Host Bridge, which
normally advertise only the resources it needs for itself.
-hpa
--
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