[LinuxBIOS] PCI IRQ routing issues with qemu

[Ed Swierk]

Hello,

I'm having some trouble getting Linux to recognize Ethernet and USB
devices when booting with LinuxBIOS on qemu 0.8.2.

During boot I see messages like:

ne2k-pci.c:v1.03 9/22/2003 D. Becker/P. Gortmaker
  http://www.scyld.com/network/ne2k-pci.html
PCI: No IRQ known for interrupt pin A of device 0000:00:03.0. Please
try using pci=biosirq.
eth0: RealTek RTL-8029 found at 0x1000, IRQ 0, 52:54:00:12:34:56.

and

USB Universal Host Controller Interface driver v3.0
PCI: No IRQ known for interrupt pin D of device 0000:00:01.2. Please
try using pci=biosirq.
uhci_hcd 0000:00:01.2: Found HC with no IRQ.  Check BIOS/PCI 0000:00:01.2 setup!
uhci_hcd 0000:00:01.2: init 0000:00:01.2 fail, -19

After groveling through the list archive for clues, I used getpir to
update irq_tables.c, since it looks like the one in
src/mainboard/emulation/qemu-i386 is pretty old. I validated the
resulting table with checkpir, and added "option HAVE_PIRQ_TABLE=1" to
Config.lb. LinuxBIOS doesn't seem to be able to use the new table,
though:

Copying IRQ routing tables to 0xf0000...done.
Verifing copy of IRQ routing tables at 0xf0000...failed

Any further clues would be appreciated. I've attached my boot log,
irq_tables.c, Config.lb, as well as the output of lspci after booting
with qemu's standard BIOS.

--Ed
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