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[Qemu-devel] pci bug
From: |
Benjamin David Lunt |
Subject: |
[Qemu-devel] pci bug |
Date: |
Wed, 2 Sep 2009 17:56:14 -0700 |
Hi,
Sorry to keep posting to the list like this, please
forgive me. However, I may have found a bug with the
PCI code too. (please correct me if I am wrong)
If I do the following:
#define PCI_ADDR 0x0CF8
#define PCI_DATA 0x0CFC
// bus 0, dev 0, func 0, addr 0
outpd(PCI_ADDR, 0x80000000);
// read in the dword at addr 0 offset 0
// and
// read in the word at addr 0 offset 2
// and the word at addr 1 offset 0
printf("0x%08X 0x%08X", inpd(PCI_DATA), inpd(PCI_DATA+2));
Qemu (0.10.6 Windows build) returns
0x12378086 0xFFFFFFFF
It seems that if I read from any offset other than PCI_DATA,
QEMU is returning 0xFFFFFFFF.
Shouldn't PCI_DATA+1, PCI_DATA+2, and PCI_DATA+3 all be registered
to the PCI emulation?
Again, hope this isn't a bother. However, would someone
please check this for me and verify that it is a bug. I can't
image it failing if Linux works fine. It may be the Windows
build only, I don't know.
Thanks,
Ben
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