From owner-freebsd-mips@FreeBSD.ORG  Thu Jul  1 18:51:18 2010
Return-Path: <owner-freebsd-mips@FreeBSD.ORG>
Delivered-To: freebsd-mips@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E41AD106564A
	for <freebsd-mips@freebsd.org>; Thu,  1 Jul 2010 18:51:18 +0000 (UTC)
	(envelope-from juli@clockworksquid.com)
Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com
	[209.85.212.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 7B08A8FC1A
	for <freebsd-mips@freebsd.org>; Thu,  1 Jul 2010 18:51:18 +0000 (UTC)
Received: by vws6 with SMTP id 6so1957350vws.13
	for <multiple recipients>; Thu, 01 Jul 2010 11:51:17 -0700 (PDT)
Received: by 10.220.126.199 with SMTP id d7mr5169266vcs.207.1278010277656; 
	Thu, 01 Jul 2010 11:51:17 -0700 (PDT)
MIME-Version: 1.0
Sender: juli@clockworksquid.com
Received: by 10.220.188.69 with HTTP; Thu, 1 Jul 2010 11:50:57 -0700 (PDT)
In-Reply-To: <AANLkTinGkedtaE0EDUWaK-Csjiy1r5pIK5U9uKWTD_PS@mail.gmail.com>
References: <AANLkTik8jFkB7FTIIhyjalkfv1c0yXqse57Jzz527uf_@mail.gmail.com> 
	<897604F6-95C4-49A8-B11F-277A74C8DBAE@gmail.com>
	<AANLkTilfW_zOFKuIa0gJ3ahTo-vGC1VNk99a1H24uFRq@mail.gmail.com> 
	<AANLkTil78NFxH016C7MntD8L3d4rFlCudJ0Lv22L0KCb@mail.gmail.com> 
	<3C0AEF9B-AE0C-4459-A4E1-2C8C30C10FD6@gmail.com>
	<AANLkTint7Hyf79EH29OLsIfreQRd7dQMdvX9wRq4v_yG@mail.gmail.com> 
	<C6D73C96-3640-4502-A9D7-B3597E37E80A@gmail.com>
	<AANLkTilQIqF4FCfgLdVcKdcsAUVjCmr89Lu0TEXUFdYN@mail.gmail.com> 
	<25B9A19D-0A6B-4731-8FB1-A2C6722F0E9C@gmail.com>
	<AANLkTim_9-G6ZuA0vkpLeG4n4GVBpBlxhGBy_7eQoIM4@mail.gmail.com> 
	<C1BD2512-8A48-4AB2-B9CA-C46DDCBE5256@gmail.com>
	<AANLkTimgyYggdDYchEfb3yskmA0PsttjVzkOSMaWFsjH@mail.gmail.com> 
	<7886D15B-79BF-4BC6-8467-26A8D0FE3D00@gmail.com>
	<AANLkTinGkedtaE0EDUWaK-Csjiy1r5pIK5U9uKWTD_PS@mail.gmail.com>
From: Juli Mallett <jmallett@FreeBSD.org>
Date: Thu, 1 Jul 2010 11:50:57 -0700
X-Google-Sender-Auth: nhq1eSdc74ZNkaQMYZSJE4jI92M
Message-ID: <AANLkTin3zIQPx4R5Ow51tg_tLZbPNYw1Zhg0-ZhLq-Q3@mail.gmail.com>
To: "Jayachandran C." <c.jayachandran@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Cc: freebsd-mips@freebsd.org
Subject: Re: Merging 64 bit changes to -HEAD
X-BeenThere: freebsd-mips@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Porting FreeBSD to MIPS <freebsd-mips.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mips>,
	<mailto:freebsd-mips-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-mips>
List-Post: <mailto:freebsd-mips@freebsd.org>
List-Help: <mailto:freebsd-mips-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mips>,
	<mailto:freebsd-mips-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Jul 2010 18:51:19 -0000

On Thu, Jul 1, 2010 at 11:47, Jayachandran C. <c.jayachandran@gmail.com> wr=
ote:
> Looks like I was on the wrong track, it now looks like the pagemask
> maybe the cause. =A0My suspicion is that the bootloader setups a
> pagemask and we never clear it because all the operations save and
> restore the mask. As far as I can see the TLB exception handler will
> not update pagemask.

Ah!  I sure think all of our code that touches the TLB should really
set PageMask.  Nice catch!

> Juli - any comments on this? Do you need to save/restore pagemask for
> some reason, otherwise I will take out the part from tlb.c. =A0Will send
> out a patch a bit later.

Feel free to remove that.  I don't think it's really useful, it seems
like it's just an old habit of mine.

Juli.