From owner-cvs-src@FreeBSD.ORG  Sun Feb 27 00:49:16 2005
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id ABEFF16A4E5; Sun, 27 Feb 2005 00:49:16 +0000 (GMT)
Received: from dong.ci0.org (cognet.ci0.org [80.65.224.102])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 7C68A43D39; Sun, 27 Feb 2005 00:49:15 +0000 (GMT)
	(envelope-from doginou@dong.ci0.org)
Received: from dong.ci0.org (localhost.ci0.org [127.0.0.1])
	by dong.ci0.org (8.13.1/8.12.11) with ESMTP id j1R0ro7C033735;
	Sun, 27 Feb 2005 01:53:50 +0100 (CET)
	(envelope-from doginou@dong.ci0.org)
Received: (from doginou@localhost)
	by dong.ci0.org (8.13.1/8.12.11/Submit) id j1R0ro9g033734;
	Sun, 27 Feb 2005 01:53:50 +0100 (CET)
	(envelope-from doginou)
Date: Sun, 27 Feb 2005 01:53:50 +0100
From: Olivier Houchard <cognet@ci0.org>
To: David Xu <davidxu@FreeBSD.org>
Message-ID: <20050227005350.GA33699@ci0.org>
References: <200502261859.j1QIx1fL008419@repoman.freebsd.org>
	<422116F0.7030604@freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <422116F0.7030604@freebsd.org>
User-Agent: Mutt/1.4.1i
cc: cvs-src@FreeBSD.org
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/arm/include machdep.h pmap.h sysarch.h
	src/sys/arm/arm cpufunc_asm.S genassym.c machdep.c pmap.c swtch.S
	src/sys/arm/xscale std.xscale src/sys/arm/xscale/i80321 std.i80321
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 27 Feb 2005 00:49:16 -0000

On Sun, Feb 27, 2005 at 08:40:16AM +0800, David Xu wrote:
> I am thinking why you can finish the task in such short time. :=)
> 
> Should sysarch(ARM_SET_TP,...) write the thread pointer to
> ARM_TP_ADDRESS now not just remembers it or did I miss
> something ?
> 
> David Xu
> 

Well I didn't really thought about it yet, but the sysarch() mechanism lost
its interest now, I was just pondering keeping it to provide a costly but
working way to handle the tp in the unlikely situation where someone would
want to do that on a SMP system with CPUs that can't lock cache line.
I have nothing aginst ARM_SET_TP changing ARM_TP_ADDRESS, but it doesn't matter
much since userland tools can mess with ARM_TP_ADDRESS directly.

Cheers,

Olivier