C2K User’s Guide
5-1
Chapter 5: Resources
5.1 Memory and I/O Address Mapping
5.1.1 PCI Buses
The C2K provides two PCI buses controlled through the MV64460 System Controller’s two PCI
bus interfaces.
PCI Bus 0 is dedicated to the PMC0 site and supports 64-bit 33/66MHz PCI or 133MHz PCI-X
operation.
PCI Bus 1 is a 64-bit 33/66MHz PCI 2.2 bus that transfers data between the MV64460 System
Controller and the cPCI backplane through the PCI 6254 cPCI Bridge. It also connects to PMC1
site, the USB 2.0 Controller through the PCI2050B PCI/PCI Bridge, and the GD31244 SATA
Host Controller.
Table 5-1 summarizes the C2K PCI local bus configurations. The MV64460 System Controller
provides arbitration for both local busses so its interfaces do not require an arbitration number.
Table 5-1
PCI local bus configuration
PCI Bus
Arbitration
No.
IDSEL
Device
0
–
AD16
MV64460 PCI Bus I/F 0
0
0
AD17
PMC0
1
–
AD16
MV64460 PCI Bus I/F 1
1
0
AD17
PMC1
1
1
AD18
PCI 6254 cPCI BP Bridge
1
2
AD19
PCI 2050B USB Bridge
1
3
AD20
GD31244 SATA Host Controller
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