[PATCH 5/6 v2] 85xxCDS: Misc 8548 PCI Corrections.

[Arnd Bergmann]

On Tuesday 24 July 2007, Zang Roy-r61911 wrote:
> > From: Randy Vinson [mailto:rvinson at mvista.com] 
> > I don't think you can have 2 primary bridges.
>
> Why?
> They belong to two separate pci domain.

PCI host bridge == PCI domain

A PHB canhave multiple buses, but only one PHB can be
the primary one, which is defined as being the one
that can hold ISA device. The problem is that ISA does
not support multiple domains, so all devices with
well-known ISA I/O port addresses have to be on the
same PHB.

	Arnd <><