IRQ_DES_64 structure (cfgmgr32.h)
The IRQ_DES structure is used for specifying either a resource list or a resource requirements list that describes IRQ line usage for a device instance. For more information about resource lists and resource requirements lists, see Hardware Resources.
Syntax
typedef struct IRQ_Des_64_s {
DWORD IRQD_Count;
DWORD IRQD_Type;
#if ...
USHORT IRQD_Flags;
USHORT IRQD_Group;
#else
DWORD IRQD_Flags;
#endif
ULONG IRQD_Alloc_Num;
ULONG64 IRQD_Affinity;
} IRQ_DES_64, *PIRQ_DES_64;
Members
IRQD_Count
For a resource list:
Zero.
For a resource requirements list:
The number of elements in the IRQ_RESOURCE structure.
IRQD_Type
Must be set to the constant value IRQType_Range.
IRQD_Flags
One bit flag from each of the flag sets described in the following table.
Flag | Definition | |
---|---|---|
Sharing Flags | ||
fIRQD_Exclusive | The IRQ line cannot be shared. | |
fIRQD_Share | The IRQ line can be shared. | |
mIRQD_Share | Bitmask for the bits within IRQD_Flags that specify the sharing value. | |
Triggering Flags | ||
fIRQD_Level | The IRQ line is level-triggered. | |
fIRQD_Edge | The IRQ line is edge-triggered. | |
mIRQD_Edge_Level | Bitmask for the bits within IRQD_Flags that specify the triggering value. |
IRQD_Group
IRQD_Alloc_Num
For a resource list:
The number of the IRQ line that is allocated to the device.
For a resource requirements list:
Not used.
IRQD_Affinity
For a resource list:
A bitmask representing the processor affinity of the IRQ line that is allocated to the device. Bit zero represents the first processor, bit two the second, and so on. Set this value to -1 to represent all processors.
For a resource requirements list:
Not used.
Requirements
Requirement | Value |
---|---|
Header | cfgmgr32.h (include Cfgmgr32.h) |