From: "Sebastian Herbszt" <herbszt@gmx.de>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
glommer@redhat.com, qemu-devel@nongnu.org,
Alexander Graf <agraf@suse.de>,
Kevin O'Connor <kevin@koconnor.net>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?)
Date: Thu, 17 Dec 2009 22:14:03 +0100 [thread overview]
Message-ID: <EA281F0B51794C55B423F46691B4A850@FSCPC> (raw)
In-Reply-To: <4B2806F1.3070504@codemonkey.ws>
Anthony Liguori wrote:
> Sebastian Herbszt wrote:
>> What about isapc? Or (pci)pc with isa card?
>
> I'm not sure how the bios enumerates isa option roms on bare metal.
Let's give this a shot:
A typical isa expansion card seems to have a jumper to select a I/O port, IRQ and
boot rom location, e.g. 280, 10, cc00.
In its default configuration the PMC directs access to 0xc0000-0xdffff to pci and
doesn't respond to those. Those accesses are forwarded to isa. Now they can be
decoded by the expansion card. I assume isa option roms just appear to be there and
the bios only needs to scan for them. This seems to be exactly what qemu does right
now with "-option-rom".
- Sebastian
next prev parent reply other threads:[~2009-12-17 21:16 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20091213200259.GB25615@redhat.com>
[not found] ` <4B260683.8000506@redhat.com>
[not found] ` <20091214093414.GA30459@redhat.com>
[not found] ` <4B26090B.8010707@redhat.com>
[not found] ` <20091214094406.GB32140@redhat.com>
[not found] ` <4B261082.4030806@redhat.com>
2009-12-14 10:59 ` [Qemu-devel] Re: qdev property bug? Michael S. Tsirkin
2009-12-14 11:55 ` Alexander Graf
2009-12-14 13:24 ` Michael S. Tsirkin
2009-12-14 13:35 ` Alexander Graf
2009-12-14 14:01 ` Michael S. Tsirkin
2009-12-14 17:00 ` Glauber Costa
2009-12-14 14:11 ` Anthony Liguori
2009-12-14 14:11 ` Michael S. Tsirkin
2009-12-14 14:13 ` Michael S. Tsirkin
2009-12-14 14:25 ` Anthony Liguori
2009-12-14 16:20 ` Michael S. Tsirkin
2009-12-14 19:12 ` Sebastian Herbszt
2009-12-14 19:20 ` Michael S. Tsirkin
2009-12-14 19:38 ` Sebastian Herbszt
2009-12-14 19:33 ` Anthony Liguori
2009-12-14 19:42 ` Michael S. Tsirkin
2009-12-14 19:59 ` Anthony Liguori
2009-12-14 20:20 ` Michael S. Tsirkin
2009-12-14 20:32 ` Gerd Hoffmann
2009-12-14 20:34 ` Michael S. Tsirkin
2009-12-14 20:36 ` Michael S. Tsirkin
2009-12-14 20:44 ` Anthony Liguori
2009-12-14 20:51 ` Michael S. Tsirkin
2009-12-15 2:37 ` Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?) Anthony Liguori
2009-12-15 3:55 ` Kevin O'Connor
2009-12-15 4:34 ` Kevin O'Connor
2009-12-15 13:15 ` Anthony Liguori
2009-12-15 14:20 ` Anthony Liguori
2009-12-15 14:33 ` [SeaBIOS] " Avi Kivity
2009-12-15 17:35 ` Anthony Liguori
2009-12-15 23:54 ` Kevin OConnor
2009-12-16 0:41 ` Anthony Liguori
2009-12-16 4:20 ` Kevin O'Connor
2009-12-15 9:17 ` Gerd Hoffmann
2009-12-15 10:14 ` Gerd Hoffmann
2009-12-15 19:10 ` Anthony Liguori
2009-12-16 12:03 ` Gerd Hoffmann
2009-12-16 12:39 ` Michael S. Tsirkin
2009-12-16 13:42 ` Gerd Hoffmann
2009-12-16 13:52 ` Michael S. Tsirkin
2009-12-16 14:12 ` Kevin O'Connor
2009-12-16 14:14 ` Michael S. Tsirkin
2009-12-16 14:17 ` Gleb Natapov
2009-12-16 14:15 ` Michael S. Tsirkin
2009-12-16 14:18 ` Gleb Natapov
2009-12-16 14:24 ` Michael S. Tsirkin
2009-12-16 14:28 ` Gleb Natapov
2009-12-16 14:28 ` Michael S. Tsirkin
2009-12-15 19:35 ` Anthony Liguori
2009-12-15 21:17 ` Michael S. Tsirkin
2009-12-15 21:41 ` Anthony Liguori
2009-12-16 0:33 ` Chris Wright
2009-12-16 1:32 ` Anthony Liguori
2009-12-16 4:57 ` Kevin O'Connor
2009-12-16 12:31 ` Gerd Hoffmann
2009-12-16 16:22 ` Gerd Hoffmann
2009-12-17 1:24 ` Kevin O'Connor
2009-12-17 9:45 ` Gerd Hoffmann
2009-12-17 9:50 ` Michael S. Tsirkin
2009-12-17 10:40 ` Gerd Hoffmann
2009-12-16 14:41 ` Gerd Hoffmann
2009-12-16 14:41 ` Michael S. Tsirkin
2009-12-16 14:50 ` [SeaBIOS] " Gleb Natapov
2009-12-15 13:16 ` Anthony Liguori
2009-12-15 21:24 ` Sebastian Herbszt
2009-12-15 21:31 ` Anthony Liguori
2009-12-15 21:38 ` Sebastian Herbszt
2009-12-15 22:00 ` Anthony Liguori
2009-12-17 21:14 ` Sebastian Herbszt [this message]
2009-12-16 4:29 ` Kevin O'Connor
2009-12-16 12:01 ` Gerd Hoffmann
2009-12-15 19:21 ` Anthony Liguori
2009-12-15 21:19 ` Michael S. Tsirkin
2009-12-15 21:45 ` Anthony Liguori
2009-12-15 21:52 ` Michael S. Tsirkin
2009-12-15 21:57 ` Anthony Liguori
2009-12-15 21:59 ` Michael S. Tsirkin
2009-12-15 22:26 ` Anthony Liguori
2009-12-15 22:51 ` Sebastian Herbszt
2009-12-16 14:49 ` Gerd Hoffmann
2009-12-17 20:33 ` Sebastian Herbszt
2009-12-15 10:51 ` Michael S. Tsirkin
2009-12-15 19:05 ` Anthony Liguori
2009-12-15 19:06 ` Anthony Liguori
2009-12-14 20:43 ` [Qemu-devel] Re: qdev property bug? Anthony Liguori
2009-12-14 20:50 ` Michael S. Tsirkin
2009-12-14 21:05 ` Anthony Liguori
2009-12-14 21:36 ` Sebastian Herbszt
2009-12-14 21:52 ` Anthony Liguori
2009-12-14 22:14 ` Sebastian Herbszt
2009-12-15 4:23 ` Kevin O'Connor
2009-12-14 20:47 ` Sebastian Herbszt
2009-12-14 20:56 ` Anthony Liguori
2009-12-14 20:38 ` Sebastian Herbszt
2009-12-14 19:51 ` Sebastian Herbszt
2009-12-14 14:22 ` Anthony Liguori
2009-12-14 17:03 ` Glauber Costa
2009-12-14 17:01 ` Glauber Costa
2009-12-14 14:10 ` Anthony Liguori
2009-12-14 14:52 ` Gerd Hoffmann
2009-12-14 14:54 ` Anthony Liguori
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