PxCI (SATA_AHCI_PORTCNTRL) Register Description
| Register Name | PxCI |
|---|---|
| Offset Address | 0x0000000038 |
| Absolute Address |
0x00FD0C0138 (SATA_AHCI_PORT0_CNTRL) 0x00FD0C01B8 (SATA_AHCI_PORT1_CNTRL) |
| Width | 32 |
| Type | rwNormal read/write |
| Reset Value | 0x00000000 |
| Description | PxCI: Port x Command Issue |
PxCI (SATA_AHCI_PORTCNTRL) Register Bit-Field Summary
| Field Name | Bits | Type | Reset Value | Description |
|---|---|---|---|---|
| CI | 31:0 | rwNormal read/write | 0x0 | Commands Issued (CI): This field is bit significant. Each bit corresponds to a command slot, where bit 0 corresponds to command slot 0. This field is set by software to indicate to the HBA that a command has been built in system memory for a command slot and may be sent to the device. When the HBA receives a FIS which clears the BSY, DRQ, and ERR bits for the command, it clears the corresponding bit in this register for that command slot. Bits in this field shall only be set to 1 by software when PxCMD.ST is set to 1. This field is also cleared when PxCMD.ST is written from a 1 to a 0 by software. |