Intel® Core™ Ultra 200V Series Processors SOC I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 831520 | 09/03/2024 | 001 | Public |
Device Control (DEVC) – Offset 88
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 15 | 0h | WO | Initiate FLR (IF) Used to initiate FLR transition. A write of '1' initiates FLR transition. Since hardware must not respond to any cycles until FLR completion, the read value by software from this bit is '0'. |
| 14:12 | 2h | RW | Max Read Request Size (MRRS) This field sets the maximum Read Request size for the Function as a Requester. The Function must not generate Read Requests with size exceeding the set value. Defined encodings for this field are: |
| 11 | 1h | RW | Enable No Snoop (NSNPEN) When set to 1 (or EM2.FNSNPEN = 1) the ACE IP is permitted to set the No Snoop bit in the Requester Attributes of a bus initiator transaction. In this case VC0 or VC1 may be used for isochronous transfers. |
| 10 | 0h | RW/L | Aux Power PM Enable (AUX) Hardwired to 0 indicating the ACE IP does not draw AUX power (outside of PME usage). |
| 9 | 0h | RO | Phantom Functions Enable (PFEN) Hardwired to 0 disabling phantom functions. |
| 8 | 0h | RW | Extended Tag Field Enable (ETEN) This bit, in combination with the 10-Bit Tag Requester Enable bit in the Device Control 2 Register, determines how many Tag field bits a Requester is permitted to use. |
| 7:5 | 0h | RW/L | Max Payload Size (MAXPAY) This field sets maximum TLP payload size for the Function. |
| 4 | 0h | RO | Enable Relaxed Ordering (ROEN) Hardwired to 0 disabling relaxed ordering. |
| 3 | 0h | RW | Unsupported Request Reporting Enable (URREN) This bit, in conjunction with other bits, controls the signaling of Unsupported Request Errors by sending error Messages. |
| 2 | 0h | RW | Fatal Error Reporting Enable (FEREN) This bit, in conjunction with other bits, controls sending ERR_FATAL Messages. |
| 1 | 0h | RW | Non-Fatal Error Reporting Enable (NFEREN) This bit, in conjunction with other bits, controls sending ERR_NONFATAL Messages. |
| 0 | 0h | RW | Correctable Error Reporting Enable (CEREN) This bit, in conjunction with other bits, controls sending ERR_COR Messages. |