Datasheet

Direct Media Interface (DMI) RCRB
262 Datasheet
9.5 DMIVC0RCTL0—DMI VC0 Resource Control
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 14–17h
Default Value: 800000FFh
Access: RO, RW
Size: 32 bits
This register controls the resources associated with PCI Express Virtual Channel 0.
Bit Access
Default
Value
Description
31 RO 1b
Virtual Channel 0 Enable (VC0E): For VC0 this is hardwired to 1 and read
only as VC0 can never be disabled.
30:27 RO 0h Reserved
26:24 RO 000b
Virtual Channel 0 ID (VC0ID): Assigns a VC ID to the VC resource. For VC0
this is hardwired to 0 and read only.
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. Because only bit 0 of that field is asserted.
This field will always be programmed to 1.
16:8 RO 000h Reserved
7:1 RW 7Fh
Traffic Class / Virtual Channel 0 Map (TCVC0M): 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. 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.
0RO1b
Traffic Class 0 / Virtual Channel 0 Map (TC0VC0M): Traffic Class 0 is always
routed to VC0.