301467-005 Datasheet, PDF (164/426 Pages) Intel Corporation – Express Chipset

Host-PCI Express* Bridge Registers (D1:F0)
(Intel® 82915G/82915P/82915PL Only)
R
8.1.47
PVCCAP2—Port VC Capability Register 2 (D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
1
108h
00000001h
RO
32 bits
This register describes the configuration of PCI Express Virtual Channels associated with this
port.
Bit
31:24
23:8
7:0
Access &
Default
Description
RO
VC Arbitration Table Offset: This field indicates the location of the VC Arbitration
00h
Table. This field contains the zero-based offset of the table in DQWORDS (16
bytes) from the base address of the Virtual Channel Capability Structure. A value
of 0 indicates that the table is not present (due to fixed VC priority).
Reserved
RO
VC Arbitration Capability: This field indicates that the only possible VC
01h
arbitration scheme is hardware fixed (in the root complex).
VC1 is the highest priority, VC0 is the lowest priority.
8.1.48
PVCCTL—Port VC Control (D1:F0)
PCI Device:
Address Offset:
Default Value:
Access:
Size:
1
10Ch
0000h
R/W
16 bits
Bit
Access &
Default
Description
15:4
Reserved
3:1
R/W
VC Arbitration Select: This field will be programmed by software to the only
000b
possible value as indicated in the VC Arbitration Capability field. The value 001b
when written to this field will indicate the VC arbitration scheme is hardware fixed
(in the root complex).
This field can not be modified when more than one VC in the LPVC group is
enabled.
0
Reserved
164
Datasheet