PCI_PMC structure (wdm.h)
The PCI_PMC structure is used to report the contents of the power management capabilities register.
Syntax
typedef struct _PCI_PMC {
UCHAR Version :3;
UCHAR PMEClock :1;
UCHAR Rsvd1 :1;
UCHAR DeviceSpecificInitialization :1;
UCHAR Rsvd2 :2;
struct _PM_SUPPORT {
UCHAR Rsvd2 :1;
UCHAR D1 :1;
UCHAR D2 :1;
UCHAR PMED0 :1;
UCHAR PMED1 :1;
UCHAR PMED2 :1;
UCHAR PMED3Hot :1;
UCHAR PMED3Cold :1;
} Support;
} PCI_PMC, *PPCI_PMC;
Members
Version
Contains a 3-bit integer that indicates the version of the PCI Power Management Interface Specification that the device complies with. For a list of values that can be assigned to this member, see the PCI Local Bus Specification.
PMEClock
Indicates, when 1, that the device relies on the presence of the PCI clock for operation of the PME signal. When this member is a "0", no PCI clock is required to generate the PME signal.
Rsvd1
Reserved.
DeviceSpecificInitialization
Indicates when 1 that the device requires a special initialization. For more information about this value, see the PCI Local Bus Specification.
Rsvd2
Reserved.
Support
Support.Rsvd2
Reserved.
Support.D1
Reserved.
Support.D2
Reserved.
Support.PMED0
Indicates that the device can assert the PME signal from D0.
Support.PMED1
Indicates that the device can assert the PME signal from D1.
Support.PMED2
Indicates that the device can assert the PME signal from D2.
Support.PMED3Hot
Indicates that the device can assert the PME signal from D3.
Support.PMED3Cold
Indicates that the device can assert the PME signal from D3.
_PM_SUPPORT
Remarks
The power management capabilities register, whose contents are reported in the PCI_PMC structure, provides information about the power management capabilities of the device.
Requirements
| Requirement | Value |
|---|---|
| Header | wdm.h (include Wdm.h, Miniport.h) |