12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767625 | 07/13/2023 | Public |
Command and Status (PCICMD_PCISTS) – 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 | 0h | RO | Reserved |
30 | 0x0 | RO/V | Signaled System Error (SERR_STS) SERR Status |
29 | 0x0 | RW/1C/V | Received Master Abort (RMA) Received Master Abort (MA): Set when IUNIT receive UR |
28 | 0x0 | RW/1C/V | Received Target Abort (RTA) Received Target Abort (RTA): Set when IUNIT receive CA |
27 | 0x0 | RW/1C/V | Signaled Target Abort (STA) Set when IUNIT receive P/NP transaction which is CA |
26:21 | 0h | RO | Reserved |
20 | 0x1 | RO | Capabilities List (CAPLIST) Indicates that the CAPPOINT register at 34h provides an offset into PCI Configuration Space containing a pointer to the location of the first item in the list. |
19 | 0x0 | RO/V | Interrupt Status (INTA_STATUS) Reflects the state of the interrupt in the camera device. Is set to 1 if IER and IIR are both set. Otherwise is set to 0. |
18:11 | 0h | RO | Reserved |
10 | 0x0 | RW | Interrupt Disable (INTA_DISABLE) When set, blocks the sending of ASSERT_INTA and DEASSERT_INTA messages to the Intel Legacy Block (ILB). The interrupt status is not blocked from being reflected in PCICMDSTS.IS. When 0, permits the sending of ASSERT_INTA and DEASSERT_INTA messages to the ILB. |
9 | 0x0 | RO | Fast Back To Back Enable (FastB2B) Hardwired to 0 |
8 | 0x0 | RO | SERR Reporting Enable (SERR_EN) SERR Reporting Enable. |
7 | 0h | RO | Reserved |
6 | 0x0 | RO | Parity Error Response Enable (Parity_Err) Parity Error Reporting Enable. |
5 | 0x0 | RO | VGA Snoop (VGA_Snp) Not applicable to internal I/O devices. Hardwired to 0. |
4 | 0x0 | RO | Memory Write and Invalidate Enable (MWrInv) Memory Write and Invalidate Enable |
3 | 0x0 | RO | Special Cycle Enable (SPECIAL_CYCLE) Reserved per PCI-Express and PCI bridge spec. |
2 | 0x0 | RW | Bus Master Enable (BME) Enables ISP to function as a PCI compliant master. When 0, blocks the sending of MSI interrupts. When 1, permits the sending of MSI interrupts. |
1 | 0x0 | RW | Memory Space Enable (MSE) Memory Space Enable (MSE): When set, accesses to this device's memory space is enabled. When 1, the ISP will compare the incoming address on the IOSF bus with ISPMMADR_BAR(31:22). If there is a match and if the IOSF command is either a MEMRD or MEMWR, the ISP will select the command and direct it to internally addressed entity. When 0, the ISP will not claim MEMRD or MEMWR IOSF commands. |
0 | 0x0 | RO | I/O Access Enable (IOAE) The IPU doesn't support IO commands. |