Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ACS Capability Register (ACSCAPR) – Offset 144
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
30:7 | - | - | Reserved
|
6 | 0b | RO | ACS Direct Translated P2P (T) ACS Direct Translated P2P (T): ACS Direct Translated P2P is not supported. |
5 | 0b | RO | ACS P2P Egress Control (E) ACS P2P Egress Control (E): ACS P2P Egress Control is not supported. |
4 | 0b | RO | ACS Upstream Forwarding (U) ACS Upstream Forwarding (U): ACS Upstream Forwarding is not supported. |
3 | 1b | RW/O | ACS P2P Completion Redirect (C) ACS P2P Completion Redirect (C): Required for all Functions that support ACS P2P Request Redirect; must be hardwired to 0b otherwise. If 1b, indicates that the component implements ACS P2P Completion Redirect. |
2 | 1b | RW/O | ACS P2P Request Redirect (R) ACS P2P Request Redirect (R): Required for Root Ports that support peer-to-peer traffic with other Root Ports; required for Switch Downstream Ports; required for multi-function device Functions that support peer-to-peer traffic with other Functions; must be hardwired to 0b otherwise. If 1b, indicates that the component implements ACS P2P Request Redirect. |
1 | 1b | RW/O | ACS Translation Blocking (B) ACS Translation Blocking (B): Required for Root Ports and |
0 | 1b | RW/O | ACS Source Validation (V) ACS Source Validation (V): Required for Root Ports and Switch Downstream Ports; must be hardwired to 0b otherwise. |