PSD_IRQ_REG

PSD_IRQ_REG keywords

Optional, Default, Can't Block

Access IRQ related registers.

This function permits access to the IRQ related registers.

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;

indicate which type of operation is to be performed.

read the interrupt request register.

read the in service register.

contains the data read from a read request, or the data to write if a write request.

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

If this function is omitted, OS/2 will perform all register 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.