Re: The IO problem on multiple PCI busses

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

>
>If we want to go a bit further, and allow ISA drivers that don't have a
>pci_dev structure to work on legacy devices on any bus, we could provide
>a set of function of the type
>
> int isa_get_bus_count();
> unsigned long isa_get_bus_io_offset(int busno);

I would add that I'd prefer to keep it separated from the PCI layer in
that sense that it can also help handle 16bits ISA-like IO busses on
embedded hardware which may (will most of the time) not have anything
like a PCI bus. Having the ability to map PCI<->ISA bus numbers should be
an option.

Ben.