Re: MTRR type AMD Duron/intel ?

[Tobias Ringstrom]

On Mon, 15 Jan 2001, Linus Torvalds wrote:
> 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.

I'm talking about bridges that bridge memory, but not io, which is quite
common.  (AGP bridges)

I do not have my PCI book right now, but there are two registers,
basically io_base and io_limit, and if io_limit == io_base-1, that means
that no io is bridged.

I still think its silly.  ;-)

/Tobias