Interrupt Entry Point

Interrupt Entry Point

When a hardware device presents an interrupt, the IRIX kernel locates a device driver for the device and calls its pfxintr() entry point. The driver processes the interrupt as quickly as possible.

In principle an interrupt can happen at any time. Normally an interrupt occurs because at some previous time, the driver initiated a device operation. Some devices can interrupt without a preceding command.

Associating Interrupt to Driver
Entry Point intr()