From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52805) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X81Je-0001y9-Mc for qemu-devel@nongnu.org; Fri, 18 Jul 2014 02:06:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X81JX-00017U-63 for qemu-devel@nongnu.org; Fri, 18 Jul 2014 02:06:46 -0400 Received: from mout.gmx.net ([212.227.17.22]:64726) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X81JW-00017Q-T0 for qemu-devel@nongnu.org; Fri, 18 Jul 2014 02:06:39 -0400 Message-ID: <53C8B966.3020901@gmx.net> Date: Fri, 18 Jul 2014 08:06:30 +0200 From: Dennis Luehring MIME-Version: 1.0 References: <53C41F17.6010503@gmx.net> <53C5A966.4070209@ilande.co.uk> <53C77091.7090706@gmx.net> <53C84CA3.5040707@ilande.co.uk> In-Reply-To: <53C84CA3.5040707@ilande.co.uk> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] can't boot debian wheezy sparc in qemu List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Mark Cave-Ayland , qemu-devel@nongnu.org Am 18.07.2014 00:22, schrieb Mark Cave-Ayland: > On 17/07/14 07:43, Dennis Luehring wrote: > > > Am 16.07.2014 00:21, schrieb Mark Cave-Ayland: > >> At the moment my work is focused on getting the basic system emulation > >> up and running, so I haven't spent much time looking at the graphics > >> side at all. > >> > >> I have noticed that the kernel falls back to the dummy console during > >> boot, so perhaps it is unable to probe the VGA device. If you append > >> vga=ask to the command line, are you able to find a framebuffer choice > >> that works? > > > > the vga=ask parameter is x86 only > > > > https://lists.debian.org/debian-user/2014/07/msg00872.html > > Really? That's a shame. The problem I'm looking into at the moment is > related to incorrect BAR ranges properties for the ebus and VGA which > means that the properties in the device tree don't always match up. > > Fortunately Linux tends to probe/configure everything itself which is > why it boots; the BSDs start parsing various BAR properties to find out > what resources have been assigned by OpenBIOS and then fall over when > the properties don't quite line up with how the BARs are programmed. It > could be that maybe the difference is also causing the VGA probe to fail? > > If any of the Debian people are interested in helping and have a debug > kernel available, I'm sure it wouldn't take someone who has basic SPARC > Linux kernel knowledge too figure out what's happening (and even better > you can boot the kernel directly in QEMU with the -kernel parameter > rather than having to keep building a custom image). > why not join debian-sparc@lists.debian.org and ask for help directly?