From owner-freebsd-smp  Thu Sep  5 19:51:13 1996
Return-Path: owner-smp
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.5/8.7.3) id TAA08065
          for smp-outgoing; Thu, 5 Sep 1996 19:51:13 -0700 (PDT)
Received: from root.com (implode.root.com [198.145.90.17])
          by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id TAA08059
          for <smp@freebsd.org>; Thu, 5 Sep 1996 19:51:10 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by root.com (8.7.5/8.6.5) with SMTP id TAA05404; Thu, 5 Sep 1996 19:50:30 -0700 (PDT)
Message-Id: <199609060250.TAA05404@root.com>
X-Authentication-Warning: implode.root.com: Host localhost [127.0.0.1] didn't use HELO protocol
To: Steve Passe <smp@csn.net>
cc: Peter Wemm <peter@spinner.dialix.com>, Terry Lambert <terry@lambert.org>,
        rv@groa.uct.ac.za, smp@freebsd.org
Subject: Re: SMP on Intel XXpress 
In-reply-to: Your message of "Thu, 05 Sep 1996 17:49:52 MDT."
             <199609052349.RAA29064@clem.systemsix.com> 
From: David Greenman <dg@Root.COM>
Reply-To: dg@Root.COM
Date: Thu, 05 Sep 1996 19:50:30 -0700
Sender: owner-smp@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

>> It would not suprise me if it was..  Something certainly is amis somewhere 
>
>I see a path in icu.s where a FAST_INTR holds the mp_lock and jmps thru
>an address in:
>
>ihandlers:			/* addresses of interrupt handlers */
>
>this is not my area of knowledge, where exactly is the thread of
>execution going at this point?

   ihandlers is an array of interrupt handlers that is indexed by the
interrupt number (0-15). It is filled with the address of the "vector"
routine (specified in your kernel config file on the controller lines,
or dynamically during system startup in the PCI case). Does this answer
your question?

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project