Datasheet

Processor Integrated I/O (IIO) Configuration Registers

88 Datasheet, Volume 2

3.3.6.7 DMIVC0RSTS—DMI VC0 Resource Status

Reports the Virtual Channel specific status.

3.3.6.8 DMIVC1RCAP—DMI VC1 Resource Capability

BAR: DMIRCBAR

Offset: 001Ah

Bit Attr Default Description

15:2 RO 0h

Reserved. Reserved and Zero for future R/WC/S implementations. Software

must use 0 for writes to these bits.

1RO 1b

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.

0RO 0bReserved

BAR: DMIRCBAR

Offset: 001Ch

Bit Attr Default Description

31:24 RO 0h Reserved for Port Arbitration Table Offset

23 RO 0 Reserved

22:16 RO 0h Reserved for Maximum Time Slots

15 RO 0h

Reject Snoop Transactions (REJSNPT)

0 = Transactions with or without the No Snoop bit set within the TLP header

are allowed on this VC.

1 = Any transaction without the No Snoop bit set within the TLP header will

be rejected as an Unsupported Request.

14:8 RO 0h 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.