Re: PROBLEM: Devices behind PCI Express-to-PCI bridge not mapped

Ivan Kokshaysky
2005-06-11T10:27:24Z

On Sat, Jun 11, 2005 at 05:33:31AM -0000, linux@horizon.com wrote:
> Actually, that's not possible, because no difference is permitted.

Not possible on only on _real_ PCI bus.

Example: virtually every laptop has mobile bridge and ISA/LPC/whatever
bridge on the same bus segment. Both are subtractive decode devices -
impossible situation from classic PCI point of view. But it's just
happens because it's _not_ PCI but some proprietary bus, even if it looks
like PCI from software point of view. And sort of priority decode is
certainly takes place there.

Ivan.