| Field Name | Bits | Type | Reset Value | Description |
|---|
| Reserved | 63:4 | razRead as zero | 0x0 | reserved |
| lnk2_ot_cbkwr | 3 | roRead-only | 0x0 | Provides status for outstanding CopyBack Write for CCIX Link2 |
| lnk2_dvmdomain_ack | 2 | roRead-only | 0x0 | Provides DVM domain status (SYSCOACK) for CCIX Link 2 |
| lnk2_link_down | 1 | roRead-only | 0x1 | Link Down status; hardware updates this register bit to indicate Link Down status 1b0: Link is not Down; hardware clears Link_DN when it receives a Link Up request 1b1: Link is Down; hardware sets Link_DN after the local agent has received all local protocol credits. The local agent must continue to respond to any remote protocol activity, including accepting and returning remote protocol credits until Link Up is clear |
| lnk2_link_ack | 0 | roRead-only | 0x0 | Link Up/Down acknowledge; hardware updates this register bit to acknowledge the software link request 1b0: Link Down acknowledge; hardware clears Link_ACK on receiving a Link Down request; the local agent stops sending protocol credits to the remote agent when Link_ACK is clear 1b1: Link Up acknowledge; hardware sets Link_ACK when the local agent is ready to start accepting protocol credits from the remote agent NOTE: The local agent must clear Link_DN before setting Link_ACK. |