From owner-freebsd-arm@FreeBSD.ORG  Sun Mar  3 06:22:14 2013
Return-Path: <owner-freebsd-arm@FreeBSD.ORG>
Delivered-To: freebsd-arm@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id D808DC97;
 Sun,  3 Mar 2013 06:22:14 +0000 (UTC)
 (envelope-from tim@kientzle.com)
Received: from monday.kientzle.com (99-115-135-74.uvs.sntcca.sbcglobal.net
 [99.115.135.74]) by mx1.freebsd.org (Postfix) with ESMTP id A61DA783;
 Sun,  3 Mar 2013 06:22:14 +0000 (UTC)
Received: (from root@localhost)
 by monday.kientzle.com (8.14.4/8.14.4) id r236MDrG063117;
 Sun, 3 Mar 2013 06:22:13 GMT (envelope-from tim@kientzle.com)
Received: from [192.168.2.143] (CiscoE3000 [192.168.1.65])
 by kientzle.com with SMTP id 4q7vnckhpcir8hhut48jeedu8a;
 Sun, 03 Mar 2013 06:22:13 +0000 (UTC)
 (envelope-from tim@kientzle.com)
Subject: Re: PHYSADDR
Mime-Version: 1.0 (Apple Message framework v1283)
Content-Type: text/plain; charset=us-ascii
From: Tim Kientzle <tim@kientzle.com>
In-Reply-To: <1362273533.1195.199.camel@revolution.hippie.lan>
Date: Sat, 2 Mar 2013 22:22:10 -0800
Content-Transfer-Encoding: 7bit
Message-Id: <1F9BEBCF-AB1C-4918-917A-921B5CC606FC@kientzle.com>
References: <E886046B-1612-425B-902B-72D4B0E93618@freebsd.org>
 <1362068453.1195.40.camel@revolution.hippie.lan>
 <674A08B3-6600-4B77-8511-9EF54E4B9B1F@FreeBSD.org>
 <8FEA3237-8ABF-4564-B672-4B4C0C6EF291@kientzle.com>
 <1362155632.1195.120.camel@revolution.hippie.lan>
 <5B622D1B-4EAE-4184-A194-DD14083A48B6@kientzle.com>
 <1362246634.1195.178.camel@revolution.hippie.lan>
 <AC642AAD-8D8C-429E-AE3B-A34241DA2517@kientzle.com>
 <1362273533.1195.199.camel@revolution.hippie.lan>
To: Ian Lepore <ian@freebsd.org>
X-Mailer: Apple Mail (2.1283)
Cc: freebsd-arm@freebsd.org
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Porting FreeBSD to the StrongARM Processor <freebsd-arm.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 03 Mar 2013 06:22:14 -0000


On Mar 2, 2013, at 5:18 PM, Ian Lepore wrote:

> On Sat, 2013-03-02 at 10:10 -0800, Tim Kientzle wrote:
>> On Mar 2, 2013, at 9:50 AM, Ian Lepore wrote:
>> 
>>> [...]
>> 
>>> I'm not sure its safe to assume that (entry-pc & 0xfffff000) is the
>>> beginning of the kernel; it's true now but need not be so.  But that's
>>> no big deal, we can tweak the linker script to give us the offset of the
>>> _start symbol so it'll work no matter what.
>> 
>> Patches?  ;-)
> 
> This turned out to be a bit trickier than I first thought it would be,
> but it worked out.
> 
> This gets rids of any reference to PHYSADDR and similar constants in the
> main path through the code.  I didn't address the "running from flash"
> case or anything under #ifdef SMP, yet.  The only constant left is
> KERNBASE which is 0xC0000000 for all arm systems.
> 
> For now I've got #undef PHYSADDR at the top of the code; this is just
> for testing without having to remove it yet from anywhere else.

I see you computing kern_physaddr here.  I presume
we should be using that in machdep.c to initialize the
page tables instead of KERNPHYSADDR?

Tim