Direct Media Interface (DMI) RCRB
262 Datasheet
9.8 DMIVC1RCTL1—DMI VC1 Resource Control
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 20–23h
Default Value: 01000000h
Access: RW, RO
Size: 32 bits
This register controls the resources associated with PCI Express Virtual Channel 1.
Bit Access
Default
Value
Description
31 RW 0b
Virtual Channel 1 Enable (VC1E):
0 = Virtual Channel is disabled.
1 = Virtual Channel is enabled.
30:27 RO 0h Reserved
26:24 RW 001b
Virtual Channel 1 ID (VC1ID): This field assigns a VC ID to the VC resource.
Assigned value must be non-zero. This field can not be modified when the VC is
already enabled.
23:20 RO 0h Reserved
19:17 RW 000b
Port Arbitration Select (PAS): This field configures the VC resource to
provide a particular Port Arbitration service. Valid value for this field is a number
corresponding to one of the asserted bits in the Port Arbitration Capability field
of the VC resource.
16:8 RO 000h Reserved
7:1 RW 00h
Traffic Class / Virtual Channel 1 Map (TCVC1M): This field 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 7 is set in this field, TC7 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. 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.
0RO0b
Traffic Class 0 / Virtual Channel 1 Map (TC0VC1M): Traffic Class 0 is
always routed to VC0.
