Specification Sheet

DMIBAR Registers

150 Datasheet, Volume 2 of 2

6.13 DMI VCm Resource Status (DMIVCMRSTS)—Offset

3Eh

Access Method

Default: 2h

Type: MEM

(Size: 16 bits)

Offset: [B:0, D:0, F:0] + 3Eh

15 12 8 4 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

RSVD

VCNEGPND

RSVD

Bit

Range

Default &

Access

Field Name (ID): Description

15:2

Reserved (RSVD): Reserved.

RO_V

VCNEGPND: Virtual Channel Negotiation Pending:

0: The VC negotiation is complete.

1: The VC resource is still in the process of negotiation (initialization or disabling).

Software may use this bit when enabling or disabling the VC. 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.

Before using a Virtual Channel, software should check whether the VC Negotiation

Pending fields for that Virtual Channel are cleared in both Components on a Link.

Reserved (RSVD): Reserved.