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From: Terry Lambert <terry@lambert.org>
Message-Id: <199609022004.NAA02867@phaeton.artisoft.com>
Subject: Re: SMP on Intel MG15
To: smp@csn.net (Steve Passe)
Date: Mon, 2 Sep 1996 13:04:40 -0700 (MST)
Cc: erich@uruk.org, terry@lambert.org, freebsd-smp@freebsd.org,
        rv@groa.uct.ac.za
In-Reply-To: <199609021951.NAA06411@clem.systemsix.com> from "Steve Passe" at Sep 2, 96 01:51:28 pm
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> Question:
> 
> isn't the STARTUP IPI redundant if the code in the INIT/RESET IPI vectors
> thru warmstart to the boot code?

>From my reading of the 1.1 specification, the STARTUP IPI method is
the preferred method, and the INIT IPI method is deprecated for use
by systems with external APIC's.

I derive this implication from the phrase "is used with systems based
on version 1.x or higher of the local APIC".  It's a pretty clear
indicator that local APIC's, version 1.x or higher, *must* honor the
STARTUP IPI.

This leaves me believing that your board is 1.4 but *not* 1.1 compliant.


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.