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xen-devel
[Xen-devel] Re: [FIXED] Missing FD0 when using XEN kernel with Linux 2.6
On 13 Mar 2005, at 10:44, Ian Pratt wrote:
We currently don't have support for ISA DMA, which the legacy floppy
driver (as opposed to USB floppy) requires.
We can access floppy drives using PIO, and I modified floppy.h in
asm-xen to do this some time ago. So I'm not sure why the OP's
controller isn't detected --- adding tracing to drivers/block/floppy.c
may help narrow down the problem.
This is now fixed in 2.0-testing and unstable. Thanks for the tracing
you sent me, John.
It turns out that when I fixed floppy.h for Xen, I mis-transcribed port
0x3f0 as 0x340 so we were trying to talk to the primary controller at
the wrong I/O address and got no response.
-- Keir
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