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[Qemu-devel] IDE busmaster DMA support

From: GaLi
Subject: [Qemu-devel] IDE busmaster DMA support
Date: Fri, 30 Sep 2005 12:15:04 +0200
User-agent: Mozilla Thunderbird 1.0.6 (X11/20050716)


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

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 ?

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