From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [BUG?] Duplicate PCI setup?
Date: Sun, 24 Sep 2006 20:09:48 +0100 [thread overview]
Message-ID: <200609242009.51974.paul@codesourcery.com> (raw)
In-Reply-To: <4516D3D5.8030004@mail.berlios.de>
On Sunday 24 September 2006 19:52, Stefan Weil wrote:
> When I start QEMU for i386 with an emulated PCI network card,
> this card's PCI memory space is setup twice:
> once by QEMU, a second time from BIOS.
>
> PCI I/O regions both times get the same address:
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
>
> PCI memory regions get two different addresses.
So? Why is this a problem?
PCI is designed to allow dynamic resource (re-)configuration.
> Maybe the setup by QEMU was needed with an earlier PC BIOS
> and is no longer needed today?
From hw/piix_pci.c
/*
* This function initializes the PCI devices as a normal PCI BIOS
* would do. It is provided just in case the BIOS has no support for
* PCI.
*/
Paul
next prev parent reply other threads:[~2006-09-24 19:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-16 19:47 [Qemu-devel] More PCI ethernet emulations Stefan Weil
2006-09-24 18:52 ` [Qemu-devel] [BUG?] Duplicate PCI setup? Stefan Weil
2006-09-24 19:09 ` Paul Brook [this message]
2006-09-24 19:47 ` Stefan Weil
2006-11-19 20:43 ` [Qemu-devel] More PCI ethernet emulations Stefan Weil
2006-11-25 14:46 ` Stefan Weil
2006-12-03 11:59 ` Stefan Weil
2007-02-27 18:47 ` Stefan Weil
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