PSD_IRQ_MASK

PSD_IRQ_MASK keywords

Optional, Default, Can't Block

Mask/Unmask IRQ levels

This function allows masking (disabling), or un-masking (enabling) of IRQ levels. When this function is invoked it should save the state of the interrupt flag, and disable interrupts before performing the mask operation. It should then restore the state of the interrupt flag.

Called in Kernel, and Interrupt Mode.

Pointer to PSD_IRQ structure.

operation completed successfully.

operation failed.

typedef struct psd_irq_s{
   ulong_t flags;    (Input)
   ulong_t data;     (Input/Output)
   ulong_t procnum;  (Input)
} PSD_IRQ;

is the logical IRQ levels to mask, or un-mask.

indicate which type of operation is to be performed.

mask (disable) IRQ levels

unmask (enable) IRQ levels

retrieves the masks for all IRQ levels

indicates that all the IRQ levels should reflect the state of the specified mask.

is the processor number of where the operation should take place.

If this function is omitted, OS/2 will perform all mask operations for an 8259 Master/Slave based PIC system. The requests will be sent to CPU0 depending on the state of the INIT_GLOBAL_IRQ_ACCESS flag.