Processor Configuration Registers
184
Datasheet, Volume 2
2.11.6
VC0RSTS—VC0 Resource Status Register
This register reports the Virtual Channel specific status.
B/D/F/Type:
0/6/0/MMR
Address Offset:
11A–11Bh
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
VC0 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.
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