Datasheet

Integrated I/O (IIO) Configuration Registers
300 Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.3.2 DMIVC0RCTL
DMI VC0 Resource Control
Controls the resources associated with PCI Express Virtual Channel 0.
Type: MEM PortID: 8’h7e
Bus: 0 Device: 0Function:0
Offset: 0x14
Bit Attr Default Description
31:31 RO 0x1
vc0e:
Virtual Channel 0 Enable
For VC0 this is hardwired to 1 and read only as VC0 can never be disabled.
30:27 RV - Reserved
26:24 RO 0x0
vc0id:
Virtual Channel 0 ID
Assigns a VC ID to the VC resource. For VC0 this is hardwired to 0 and read
only.
23:8 RV - Reserved
7:7 RO 0x0
tc7vc0m:
Traffic Class 7/ Virtual Channel 0 Map
Traffic Class 7 is always routed to VCm.
6:1 RW_LB 0x3f
tcvc0m:
Traffic Class / Virtual Channel 0 Map
Indicates the TCs (Traffic Classes) that are mapped to the VC resource. Bit
locations within this field correspond to TC values.For example, when bit 6
is set in this field, TC6 is mapped to this VC resource. When more than one
bit in this field is set, it indicates that multiple TCs are mapped to the VC
resource. In order to remove one or more TCs from the TC/VC Map of an
enabled VC, software must ensure that no new or outstanding transactions
with the TC labels are targeted at the given Link.
0:0 RO 0x1
tc0vc0m:
Traffic Class 0 / Virtual Channel 0 Map
Traffic Class 0 is always routed to VC0.