Re: cardbus/pcmcia/pci bridge problems?

[Alan Cox]

> >The $PIR table in the BIOS provided no useful information on what IRQ
> >to use, or we didn't know the IRQ router concerned to set it up.
> 
> alan: let me check what you're saying: despite the fact that lspci -vv
> shows the relevant information, there is still a problem? 
> 
> the problem is either in the BIOS or its an issue with the kernel not
> knowing which IRQ router to use when setting up the interrupt? sorry
> to be repetitive, but i'm just trying to check that i fully understand
> this.

There are two stages to IRQ routing

1.	Knowing how INTA/B/C/D on the slot are wired to the INTA-D lines
	on the PCI bus (its not 1-1)
2.	Knowing how to drive the PCI irq routing hardware to route a
	line to an ISA IRQ or to work out which it already goes to