Re: [Qemu-devel] IDE busmaster DMA support

[GaLi]

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 <address@hidden> 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 ?