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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Linux 2.4.0test11-ac1
Date: 21 Nov 2000 16:07:52 -0800
Organization: Transmeta Corporation, Santa Clara CA
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In-Reply-To: <Pine.GSO.3.96.1001121195742.28403E-100000@delta.ds2.pg.gda.pl> <E13yMsl-0005Lb-00@the-village.bc.nu>
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Copyright: Copyright 2000 H. Peter Anvin - All Rights Reserved
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Followup to:  <E13yMsl-0005Lb-00@the-village.bc.nu>
By author:    Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
> 
> > > making any assumptions about APIC availability on a processor.
> > 
> >  OK, but how does it handle the 82489DX?  There are valid configurations
> > using this kind of APIC, including Pentium P54C ones...
> 
> These processors don't report the APIC on the cpuid ? If so then I guess
> the fix is something like this
> 
> 	if( cpuid says there is no local apic && vendor != intel)
> 
> Intel stuff appears to always be happy poking in APIC space. I don't know
> if this is related to the chip internals on the non APIC capable chips.
> 

Nononono... the 82489DX is an *external* APIC, which should be usable
on any Socket 5/7 CPU...

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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