Intel Extensible Firmware Interface User Manual
Page 425
Protocols
— PCI Bus Support
Version 1.10
12/01/02
12-7
Figure 12-6 shows a server system with two PCI Host Buses and one PCI Root Bridge per PCI Host
Bus. This system supports up to 512 PCI Buses, but the PCI I/O, PCI Memory Space, and PCI
Prefetchable Memory Space are not shared between the two PCI Root Bridges. The firmware for
this platform would produce two instances of the PCI Root Bridge I/O Protocol.
OM13164
PCI Segment 0
Core Chipset Components
PCI Host Bus 0
PCI RB
PCI Segment 1
PCI RB
PCI Host Bus 1
Figure 12-6. Server System with Two PCI Host Buses
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