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SubjectRe: Fwd: Patch to control VGA bus routing and active VGA device.
On Fri, Jan 28, 2005 at 11:41:16AM -0800, Jesse Barnes wrote:
> Yeah, I think I understand. We could probably do the same thing on sn2
> as you do on parisc--add a 'segment 0' offset to the port so that it's routed
> correctly. I think that's a little less flexible than adding a new resource
> though, since it makes it harder for drivers to support more than one device
> or devices on non-segment 0 busses.

To be clear, the parisc code defines this in include/asm-parisc/pci.h:

#define HBA_PORT_SPACE_BITS 16
#define PCI_PORT_HBA(a) ((a) >> HBA_PORT_SPACE_BITS)

and PCI_PORT_HBA gets used in arch/parisc/kernel/pci.c.

Offhand, I don't know if ia64 has the equivalent.
But it sounds like it might need it.

grant
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