PCI bus numbering and orphaned devices

[Bernd Walter]

On Wed, Jun 11, 2003 at 04:26:27PM +0200, Thomas Moestl wrote:
> On Tue, 2003/06/10 at 16:41:44 -0700, John-Mark Gurney wrote:
> > Ok, the only problem is that is then we have the same problem the ACPI
> > code does in that hot swapping cards would have a problem.  Since it
> > appears to me that the OFW tree doesn't get updated upon a swap.  (At
> > least the usb part of the tree doesn't.)
> 
> We do not support hotplugging at the moment anyway. If a bridge driver
> would implement that in the future without using any firmware support
> however, it will then need to know everything information about the
> interrupt routing required for its devices if it cannot use the
> firmware for this. in that case, it can just prevent the ofw_pci bus
> from attaching to it (this will be easily possible).
> I'd hope that machines that support hot-plugging of PCI devices would
> have firmware methods available to support that though.

I have no clue about cardbus, but for PCI hotplugging you need hardware
specific support to power down the slots.
But hotplug PCI is not a realm of specific machines, as you can attach
add-on hotplug frames to any PCI system.

-- 
B.Walter                   BWCT                http://www.bwct.de
ticso at bwct.de                                  info at bwct.de