PCI_EXPRESS_SLOT_STATUS_REGISTER union (ntddk.h)
The PCI_EXPRESS_SLOT_STATUS_REGISTER structure describes a PCI Express (PCIe) slot status register of a PCIe capability structure.
Syntax
typedef union _PCI_EXPRESS_SLOT_STATUS_REGISTER {
struct {
USHORT AttentionButtonPressed :1;
USHORT PowerFaultDetected :1;
USHORT MRLSensorChanged :1;
USHORT PresenceDetectChanged :1;
USHORT CommandCompleted :1;
USHORT MRLSensorState :1;
USHORT PresenceDetectState :1;
USHORT ElectromechanicalLockEngaged :1;
USHORT DataLinkStateChanged :1;
USHORT Rsvd :7;
};
USHORT AsUSHORT;
} PCI_EXPRESS_SLOT_STATUS_REGISTER, *PPCI_EXPRESS_SLOT_STATUS_REGISTER;
Members
DUMMYSTRUCTNAME
DUMMYSTRUCTNAME.AttentionButtonPressed
A single bit that indicates that the attention button for the slot is being pressed.
DUMMYSTRUCTNAME.PowerFaultDetected
A single bit that indicates that a power fault at the slot has been detected.
DUMMYSTRUCTNAME.MRLSensorChanged
A single bit that indicates that the state of the slot's manually operated retention latch (MRL) sensor has changed.
DUMMYSTRUCTNAME.PresenceDetectChanged
A single bit that indicates that the card presence detection state for the slot has changed.
DUMMYSTRUCTNAME.CommandCompleted
A single bit that indicates that a command has been completed by the slot's hot-plug controller.
DUMMYSTRUCTNAME.MRLSensorState
The slot's manually operated retention latch (MRL) sensor state. Possible values are:
MRLClosed
The MRL is closed.
MRLOpen
The MRL is open.
DUMMYSTRUCTNAME.PresenceDetectState
The slot's card presence detection state. Possible values are:
SlotEmpty
The slot is empty.
CardPresent
A card is present in the slot.
DUMMYSTRUCTNAME.ElectromechanicalLockEngaged
A single bit that indicates if the slot's electromechanical interlock is engaged.
DUMMYSTRUCTNAME.DataLinkStateChanged
A single bit that indicates that the data link layer active bit of the PCIe link status register of the PCIe capability structure has changed.
DUMMYSTRUCTNAME.Rsvd
Reserved.
AsUSHORT
A USHORT representation of the contents of the PCI_EXPRESS_SLOT_STATUS_REGISTER structure.
Remarks
The PCI_EXPRESS_SLOT_STATUS_REGISTER structure is available in Windows Server 2008 and later versions of Windows.
A PCI_EXPRESS_SLOT_STATUS_REGISTER structure is contained in the PCI_EXPRESS_CAPABILITY structure.
Requirements
Requirement | Value |
---|---|
Header | ntddk.h (include Ntddk.h, Miniport.h) |