316972-004 Datasheet, PDF (349/884 Pages) Intel Corporation – Intel I/O Controller Hub 9

Chipset Configuration Registers
10.1.7
V0CTL—Virtual Channel 0 Resource Control Register
Offset Address: 0014–0017h
Default Value: 800000FFh
Attribute:
Size:
R/W, RO
32-bit
Bit
31
30:27
26:24
23:20
19:17
16
15:8
7:1
0
Description
Virtual Channel Enable (EN) — RO. Always set to 1. VC0 is always enabled and
cannot be disabled.
Reserved
Virtual Channel Identifier (ID) — RO. Indicates the ID to use for this virtual
channel.
Reserved
Port Arbitration Select (PAS) — R/W. Indicates which port table is being
programmed. The root complex takes no action on this setting since the arbitration is
fixed and there is no arbitration table.
Load Port Arbitration Table (LAT) — RO. The root complex does not implement
an arbitration table for this virtual channel.
Reserved
Transaction Class / Virtual Channel Map (TVM) — R/W. Indicates which
transaction classes are mapped to this virtual channel. When a bit is set, this
transaction class is mapped to the virtual channel.
Reserved
10.1.8
V0STS—Virtual Channel 0 Resource Status Register
Offset Address: 001A–001Bh
Default Value: 0000h
Attribute:
Size:
RO
16-bit
Bit
15:2
1
0
Description
Reserved
VC Negotiation Pending (NP) — RO. When set, indicates the virtual channel is still
being negotiated with ingress ports.
Port Arbitration Tables Status (ATS) — RO. There is no port arbitration table for
this VC, so this bit is reserved at 0.
Intel^® I/O Controller Hub 9 (ICH9) Family Datasheet
349