From owner-freebsd-sparc64@freebsd.org  Fri Sep 18 06:59:57 2015
Return-Path: <owner-freebsd-sparc64@freebsd.org>
Delivered-To: freebsd-sparc64@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id EC71E9CE1BF
 for <freebsd-sparc64@mailman.ysv.freebsd.org>;
 Fri, 18 Sep 2015 06:59:57 +0000 (UTC)
 (envelope-from mark.cave-ayland@ilande.co.uk)
Received: from s16892447.onlinehome-server.info
 (s16892447.onlinehome-server.info [82.165.15.123])
 (using TLSv1 with cipher AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id AA2A7161A;
 Fri, 18 Sep 2015 06:59:57 +0000 (UTC)
 (envelope-from mark.cave-ayland@ilande.co.uk)
Received: from [2.219.74.29] (helo=[192.168.1.86])
 by s16892447.onlinehome-server.info with esmtpsa
 (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.76)
 (envelope-from <mark.cave-ayland@ilande.co.uk>)
 id 1ZcpeC-0006Fk-JP; Fri, 18 Sep 2015 07:59:55 +0100
Message-ID: <55FBB662.4080708@ilande.co.uk>
Date: Fri, 18 Sep 2015 07:59:46 +0100
From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:31.0) Gecko/20100101 Icedove/31.8.0
MIME-Version: 1.0
To: Alexey Dokuchaev <danfe@FreeBSD.org>, 
 Marius Strobl <marius@alchemy.franken.de>
CC: "freebsd-sparc64@freebsd.org" <freebsd-sparc64@freebsd.org>
References: <20150906124859.GA14919@FreeBSD.org>
 <20150907203152.GA70457@alchemy.franken.de> <55EDFE00.9090109@ilande.co.uk>
 <20150913022143.GA7862@alchemy.franken.de>
 <20150913103940.GA60101@FreeBSD.org>
 <20150913180126.GC7862@alchemy.franken.de> <55F89861.1030107@ilande.co.uk>
 <20150916031030.GA6711@FreeBSD.org> <55F9C2B8.7030605@ilande.co.uk>
 <20150916211914.GD18789@alchemy.franken.de>
 <20150917082817.GA71811@FreeBSD.org>
In-Reply-To: <20150917082817.GA71811@FreeBSD.org>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
X-SA-Exim-Connect-IP: 2.219.74.29
X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk
Subject: Re: PCI range checking under qemu-system-sparc64
X-SA-Exim-Version: 4.2.1 (built Sun, 08 Jan 2012 02:45:44 +0000)
X-SA-Exim-Scanned: No (on s16892447.onlinehome-server.info); Unknown failure
X-BeenThere: freebsd-sparc64@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Porting FreeBSD to the Sparc <freebsd-sparc64.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-sparc64>, 
 <mailto:freebsd-sparc64-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-sparc64/>
List-Post: <mailto:freebsd-sparc64@freebsd.org>
List-Help: <mailto:freebsd-sparc64-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-sparc64>, 
 <mailto:freebsd-sparc64-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Sep 2015 06:59:58 -0000

On 17/09/15 09:28, Alexey Dokuchaev wrote:

> On Wed, Sep 16, 2015 at 11:19:15PM +0200, Marius Strobl wrote:
>> [...]
>> Which suggest that the next thing to investigate is the CMD646
>> emulation. Is there a particular reason why QEMU emulates a
>> CMD646U rather than a plain CMD646 as found in the real sun4u
>> machines of the USIIe/i era?
>>
>> Alexey, does building the port with CDROM_DMA disabled make
>> a difference?
> 
> Ironically I had it already disabled prior to your question; but I've
> rebuilt the port enabling it for completeness' sake.  It did not make
> a difference.
> 
> Then I've disabled all CAM/ATA stuff (scbus, ata, umass, etc.) in the
> kernel config and that's what I see now (this is with CDROM_DMA=on):

What does the CAM/ATA stuff do here? Does this mean it may not
necessarily be an interrupt issue if you can get to mounting the root fs
with CDROM_DMA=on?


ATB,

Mark.