Still IRQ routing problems with bridged devices.

John Baldwin jhb at
Fri Jan 23 11:29:11 PST 2004

On Friday 02 January 2004 05:40 pm, Bernd Walter wrote:
> On Fri, Jan 02, 2004 at 04:30:44PM -0500, John Baldwin wrote:
> >  3) the host bridge lookes up 0.2.0 INTA in the $PIR, chooses an IRQ from
> >     the possible list (defaults to just using first IRQ) and returns it.
> >     This step should be skipping IRQ 4 adn using IRQ 10 or 11 instead
> That's the interesting part.
> What exactly is in the $PIR table?
> Fact is that the 4 PCI connectors share the same intlines wired in
> different INTA-D order which is board specific.
> The intlines are setup by the BIOS to 5, 10, 11 and 12.
> Now FreeBSD has found out that it needs 0.2.0 INTA for the bridged device
> 1.8.0 INTA.
> It now incorrectly selects IRQ4 for 0.2.0 INTA, which is already
> in use for a ISA device by an PnP On-Board component.
> It also has to connect the intline with IRQ4 anywhere in the chipset,
> which doesn't seem to happen, because the IRQ doesn't even work.
> And I don't see the point why this is not a problem for non bridged
> devices, which would also require an IRQ for 0.2.0 INTA.

Can you please try the patch at

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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