From: Dennis Luehring <dl.soluz@gmx.net>
To: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] can't boot debian wheezy sparc in qemu
Date: Fri, 18 Jul 2014 08:06:30 +0200 [thread overview]
Message-ID: <53C8B966.3020901@gmx.net> (raw)
In-Reply-To: <53C84CA3.5040707@ilande.co.uk>
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?
next prev parent reply other threads:[~2014-07-18 6:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-14 18:19 [Qemu-devel] can't boot debian wheezy sparc in qemu Dennis Luehring
2014-07-15 22:21 ` Mark Cave-Ayland
2014-07-17 6:43 ` Dennis Luehring
2014-07-17 22:22 ` Mark Cave-Ayland
2014-07-18 6:06 ` Dennis Luehring [this message]
2014-07-18 8:29 ` Mark Cave-Ayland
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