12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 767625 | 07/13/2023 | Public |
Command and Status (COMMAND_STATUS) – Offset 4
Command register to program interrupt disable, bus master enable and Memory space enable.
Status register to read the errors and aborts.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0x0 | RO | Detected Parity Error (DETECTED_PARITY_ERROR) Not implemented. |
| 30 | 0x0 | RO | Signaled System Error (SIGNALED_SYSTEM_ERROR) This bit is set when the device has detected an un-correctable error and reported it via SERR message over sideband. |
| 29 | 0x0 | RO | Received Master Abort (RECEIVED_MASTER_ABORT_STATUS) This bit is set when device receives a Completion transaction with Unsupported Request completion status. |
| 28 | 0x0 | RO | Received Target Abort (RECEIVED_TARGET_ABORT_STATUS) This bit is set when device receives a Completion transaction with Completer Abort completion status. |
| 27 | 0x0 | RO | Signaled Target Abort (SIGNALED_TARGET_ABORT_STATUS) Set by the device when aborting a request that violates the device programming model. |
| 26:25 | 0h | RO | Reserved |
| 24 | 0x0 | RO | Master Data Parity Error (MASTER_DATA_PARITY_ERROR) This bit is Set by a Requester if the Parity Error Response bit in the Command register is 1b and |
| 23:21 | 0h | RO | Reserved |
| 20 | 0x1 | RO | Capabilities List (CAPABILITIES_LIST) This optional read-only bit indicates whether or not this device implements the pointer for a New Capabilities linked list at offset 34h. |
| 19 | 0x0 | RO | Interrupt Status (INTERRUPT_STATUS) Reflects the state of the interrupt pin at the input of the enable/disable circuit. |
| 18:11 | 0h | RO | Reserved |
| 10 | 0x0 | RO | Interrupt Disable (INTERRUPT_DISABLE) Disables the function to generate INTx interrupt. A value of 0 enables the function to generate INTA messages. |
| 9 | 0h | RO | Reserved |
| 8 | 0x0 | RO | SERR Reporting Enable (SERR_ENABLE) Setting this bit enables the generation of System Error messages. |
| 7 | 0h | RO | Reserved |
| 6 | 0x0 | RO | Parity Error Response Enable (PARITY_ERROR_RESPONSE) This bit controls the logging of poisoned TLPs in the Master Data Parity Error bit in the Status register. |
| 5:3 | 0h | RO | Reserved |
| 2 | 0x0 | RO | Bus Master Enable (BUS_MASTER_ENABLE) Controls the ability of a PCI Express Endpoint to issue Memory and I/O Read/Write Requests, and the ability of a Root or Switch Port to forward Memory and I/O Read/Write Requests in the Upstream direction.
|
| 1 | 0x0 | RW | Memory Space Enable (MEMORY_SPACE_ENABLE) When set, Memory Space Decoding is enabled and memory transactions targeting the device are accepted |
| 0 | 0h | RO | Reserved |