Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
PCI Power Management Control And Status (PMCS) – Offset 74
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
15 | 0h | RW/1C/V | PME Status (PMES) This bit is set when a PME event is to be requested, and if this bit is set and PMEE is set, a PME# will be generated. This register field is not reset by FLR. |
14:9 | 0h | RO | RSVD0 (RSVD0) Reserved |
8 | 0h | RW | PME Enable (PMEE) When set, the SATA controller generates PME# from D3HOT on a wake event. Note: Software is advised to clear PMEE together with PMES prior to changing CC.SCC thru SATAGC.SMS. This register field is not reset by FLR. |
7:4 | 0h | RO | RSVD1 (RSVD1) Reserved |
3 | 1h | RO | No Soft Reset (NSFRST) A 1 indicates that devices transitioning from D3hot to D0 because of PowerState commands do not perform an internal reset. Configuration context is preserved. Upon transition from the D3hot to the D0 state initialized state, no additional operating system intervention is required to preserve configuration context beyond writing to the PowerState bits. Regardless of this bit, the controller transition from D3hot to the D0 by a system or bus segment reset will return to the state D0 uninitialized with only PME context preserved if PME is supported and enabled. |
2 | 0h | RO | RSVD2 (RSVD2) Reserved |
1:0 | 0h | RW | Power State (PS) This field is used both to determine the current power state of the SATA Controller and to set a new power state. The values are: 00 = D0 state; 11 = D3HOT state. |