PSD_IRQ_REG

PSD_IRQ_REG keywords

Optional, Default, Can't Block

Description
Access IRQ related registers.

This function permits access to the IRQ related registers.

Mode
Called in Kernel, and Interrupt Mode.

Entry
Pointer to PSD_IRQ structure.

Exit

NO_ERROR

operation completed successfully.
-1
operation failed.
Structures

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

flags

indicate which type of operation is to be performed.

IRQ_READ_IRR

read the interrupt request register.
IRQ_READ_ISR
read the in service register.
data
contains the data read from a read request, or the data to write if a write request.
procnum
is the processor number of where the operation should take place.
Notes
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.

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