Processor Configuration Registers
194
Datasheet, Volume 2
2.12.13 DMIVCPRSTS—DMI VCp Resource Status Register
This register reports the Virtual Channel specific status.
B/D/F/Type:
0/0/0/DMIBAR
Address Offset:
32–33h
Reset Value:
0002h
Access:
RO-V
Size:
16 bits
BIOS Optimal Default
0000h
Bit
Attr
Reset
Value
RST/
PWR
Description
15:2
RO
0h
Reserved
1
RO-V
1b
Uncore
Virtual Channel private Negotiation Pending (VCPNP)
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 when 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 must check whether the
VC Negotiation Pending fields for that Virtual Channel are cleared
in both Components on a Link.
0
RO
0h
Reserved