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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.
PCI local bus configuration
Table 5-1
Arbitration
PCI Bus
No.
0
–
0
0
1
–
1
0
1
1
1
2
1
3
C2K User's Guide
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IDSEL
AD16
MV64460 PCI Bus I/F 0
AD17
PMC0
AD16
MV64460 PCI Bus I/F 1
AD17
PMC1
AD18
PCI 6254 cPCI BP Bridge
AD19
PCI 2050B USB Bridge
AD20
GD31244 SATA Host Controller
Device
5-1
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