From owner-freebsd-arm@FreeBSD.ORG  Fri Sep 28 12:58:55 2007
Return-Path: <owner-freebsd-arm@FreeBSD.ORG>
Delivered-To: freebsd-arm@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 435A716A468
	for <freebsd-arm@freebsd.org>; Fri, 28 Sep 2007 12:58:55 +0000 (UTC)
	(envelope-from tinguely@casselton.net)
Received: from casselton.net (casselton.net [63.165.140.2])
	by mx1.freebsd.org (Postfix) with ESMTP id 0268813C48A
	for <freebsd-arm@freebsd.org>; Fri, 28 Sep 2007 12:58:54 +0000 (UTC)
	(envelope-from tinguely@casselton.net)
Received: from casselton.net (localhost [127.0.0.1])
	by casselton.net (8.13.8/8.13.8) with ESMTP id l8SCwpA4013427;
	Fri, 28 Sep 2007 07:58:51 -0500 (CDT)
	(envelope-from tinguely@casselton.net)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=casselton.net;
	s=ccnMail; t=1190984332; bh=2nc5z6geZ3H4bO1C3thxyt1ovbVqxVmyv/GwffA
	ZlQg=; h=Received:Date:From:Message-Id:To:Subject:Cc:In-Reply-To;
	b=Tr5nJCk/onzPBfy3UbphO2us7meBU78GkYErBJqRxhqe7ZgMXjN6qFSmRCMISdXDp
	67ejgUHOggwZrweHcbjtWZM0qa89EcjXP/OBBe2bnedonjPecirfp6aMVOPhhv/kxJe
	z2TKCtzzN1Gw27cnxXdhILbggxeToDbjpi1NV8U=
Received: (from tinguely@localhost)
	by casselton.net (8.13.8/8.13.8/Submit) id l8SCwpDA013426;
	Fri, 28 Sep 2007 07:58:51 -0500 (CDT) (envelope-from tinguely)
Date: Fri, 28 Sep 2007 07:58:51 -0500 (CDT)
From: Mark Tinguely <tinguely@casselton.net>
Message-Id: <200709281258.l8SCwpDA013426@casselton.net>
To: marius.nuennerich@gmx.de, mlfbsd@ci0.org
In-Reply-To: <20070928102332.GA23400@ci0.org>
Cc: freebsd-arm@freebsd.org
Subject: Re: Comment bug in locore.S?
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Porting FreeBSD to the StrongARM Processor <freebsd-arm.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Fri, 28 Sep 2007 12:58:55 -0000


>  > > How about saving the jump address in another register also before the jump:
>  > > 
>  > > 	ldr	r10, .Lvirt_done
>  > > 	ldr	pc, .Lvirt_done
>  > 
>  > I tried this but used r9, anyway the register isn't used otherwise and
>  > it's contents is R09=c00002a4 after qemu crashes. Is it possible that
>  > this would be the right address if the kernel would start at 0x30000000
>  > and not on 0x30008000 physical address? 
>
>  Ah good point. KERNVIRTADDR should be 0xc0008000, not 0xc0000000.
>  As we're mapping it with sections, we don't have enough granularity to map it
>  to 0xc0000000.

Wouldn't it be more appropriate to start the physical/virtual address
on a L1 boundary (1 MB) rather than on a 32K boundary?

I notice the style of the Xscale ports to put the physical address of
of the startup L1 before the kernel, and the at91 ports to put this
address after the kernel.

--Mark Tinguely.