Specification Sheet

Datasheet, Volume 2 of 2 407
PCI Express* Controller (x16) Registers
12.52 Port VC Control (PVCCTL)—Offset 10Ch
Access Method
Default: 0h
12.53 VC0 Resource Capability (VC0RCAP)—Offset 110h
Access Method
Default: 1h
Bit
Range
Default &
Access
Field Name (ID): Description
31:24
0h
RO
VCATO: VC Arbitration Table Offset: Indicates the location of the VC Arbitration 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).
23:8
0h
RO
Reserved (RSVD): Reserved.
7:0
0h
RO
VCAC: Reserved for VC Arbitration Capability:
Type: CFG
(Size: 16 bits)
Offset: [B:0, D:1, F:0] + 10Ch
15 12 8 4 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RSVD
VCAS
VCARB
Bit
Range
Default &
Access
Field Name (ID): Description
15:4
0h
RO
Reserved (RSVD): Reserved.
3:1
0h
RW
VCAS: VC Arbitration Select: This field will be programmed by software to the only
possible value as indicated in the VC Arbitration Capability field. Since there is no other
VC supported than the default, this field is reserved.
0
0h
RO
VCARB: Reserved for Load VC Arbitration Table: Used for software to update the VC
Arbitration Table when VC arbitration uses the VC Arbitration Table. As a VC Arbitration
Table is never used by this component this field will never be used.
Type: CFG
(Size: 32 bits)
Offset: [B:0, D:1, F:0] + 110h