Datasheet

Datasheet 263
Direct Media Interface (DMI) RCRB
9.6 DMIVC0RSTS—DMI VC0 Resource Status
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 1A–1Bh
Default Value: 0002h
Access: RO
Size: 16 bits
This register reports the Virtual Channel specific status.
9.7 DMIVC1RCAP—DMI VC1 Resource Capability
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 1C–1Fh
Default Value: 00008001h
Access: RO
Size: 32 bits
Bit Access
Default
Value
Description
15:2 RO 0000h Reserved
1RO1b
Virtual Channel 0 Negotiation Pending (VC0NP):
0 = The VC negotiation is complete.
1 = The VC resource is still in the process of negotiation (initialization or
disabling).
This bit indicates the status of the process of Flow Control initialization. It is set
by default on Reset, as well as whenever the corresponding Virtual Channel is
Disabled or the Link is in the DL_Down state.
It is cleared when the link successfully exits the FC_INIT2 state.
BIOS Requirement: Before using a Virtual Channel, software must check
whether the VC Negotiation Pending fields for that Virtual Channel are cleared in
both Components on a Link.
0 RO 0b Reserved
Bit Access
Default
Value
Description
31:16 RO 00h Reserved
15 RO 1b
Reject Snoop Transactions (REJSNPT):
0 = Transactions with or without the No Snoop bit set within the TLP header are
allowed on this VC.
1 = When Set, any transaction for which the No Snoop attribute is applicable but
is not Set within the TLP Header will be rejected as an Unsupported Request.
14:8 RO 00h Reserved
7:0 RO 01h
Port Arbitration Capability (PAC): Having only bit 0 set indicates that the
only supported arbitration scheme for this VC is non-configurable hardware-
fixed.