IntrMask (Windows Embedded CE 6.0)
1/5/2010
This global variable array provides the MIPS kernel with information about which nested interrupts are masked while the current interrupt is being handled.
Syntax
extern BYTE IntrMask [];
Parameters
None.
Return Value
None.
Remarks
Because there is no hard-coded priority scheme in MIPS architecture, the kernel uses two structures that provide information about nested interrupts, IntrMask and IntrPriority
The IntrMask table defines how to set the interrupt mask while servicing the interrupt. The pIntrMask member of the OEMGlobal structure points to the IntrMask table.
The IntrMask table tells the kernel which interrupt mask to set in the CPU during execution of the interrupt service routine. A 1 indicates the interrupt at that bit is masked (the value is negated and shifted before programming the status register).
The following code example shows how you use IntrMask.
// OEM Review : Disabled nested interrupts
IntrMask:
.byte 0x3f // 00 0000 // for spurious interrupt
.byte 0x3f // 00 0001
.byte 0x3f // 00 0010
.byte 0x3f // 00 0100
.byte 0x3f // 00 1000
.byte 0x3f // 01 0000
.byte 0x3f // 10 0000
.byte 0x00 // padding
Requirements
| Header | Developer Implemented |
| Windows Embedded CE | Windows CE .NET 4.0 and later |