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Date: Fri, 30 Sep 2005 14:20:03 +0200
From: GaLi <g_cavelier@yahoo.fr>
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Subject: Re: [Qemu-devel] IDE busmaster DMA support
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To: qemu-devel@nongnu.org


It's an IDE driver for my own OS.

I don't think it comes from qemu because linux get it right. I tried to 
read linux source code but it's way too complicated.

I'll try in bochs and VMWare and tell you the results

Hetz Ben Hamo wrote:
> Hi,
> 
> Which IDE driver do u try to write? for QEMU? or for a guest OS?
> 
> The IDE implementation of QEMU has few bugs (notice how the hack win2k
> installation needs), so I would suggest to you to either try it with
> BOCHS or with a trial version of VMWare.
> 
> Thanks,
> Hetz
> 
> On 9/30/05, GaLi <g_cavelier@yahoo.fr> wrote:
> 
>>Hi,
>>
>>I'm trying to write an IDE driver with busmaster DMA support.
>>My problem is that I can't get the right controller registers addresses.
>>
>>In the IDE BusMaster DMA specification :
>>
>>"The control registers for the controller are allocated via the
>>devices Base Address register at offset 0x20 in PCI configuration
>>space."
>>
>>If I read the word at offset 0x20 in the PCI configuration space, I get
>>0xc001. But if I boot qemu with a linux live-cd, it tells me that BM-DMA
>>is at 0xc000
>>
>>Do I have to init the PCI IDE controller or something ?