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PCI_PMC structure (wdm.h)

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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)

See also

PCI_PM_CAPABILITY