Intel i7-2600 CM8062300834302S User Manual

Datasheet, Volume 2

191

This register reports the Virtual Channel specific status.

15:2

RO

0h

1

RO-V

1b

Uncore

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 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.
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

0h

31:24

RO

00h

Uncore

23

RO

0h

22:16

RO

00h

Uncore

15

RO

1b

Uncore

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

0h

7:0

RO

01h

Uncore

Port Arbitration Capability (PAC)
Having only bit 0 set indicates that the only supported arbitration 

scheme for this VC is non-configurable hardware-fixed.