IMPLEMENTING PSEUDO NON-MASKING INTERRUPTS BEHAVIOR USING A PRIORITY INTERRUPT CONTROLLER

摘要

A method is provided for handling interrupts in a processor, the interrupts including regular interrupts having a range of priorities and a pseudo non-maskable interrupt (PNMI) that is of a higher priority than any of the regular interrupts. The method includes the steps of obtaining an interrupt vector corresponding to a received interrupt, and if the received interrupt is a regular interrupt, enabling interrupts in the processor so that a PNMI can be received while handling the regular interrupt, executing a regular interrupt handler using the interrupt vector, and disabling interrupts in the processor. On the other hand, if the received interrupt is a PNMI, a PNMI interrupt handler is executed using the interrupt vector as an input thereto.

主权项

1. A method for handling interrupts in a processor, the interrupts including regular interrupts having a range of priorities and a pseudo non-maskable interrupt (PNMI) that is of a higher priority than any of the regular interrupts, the method comprising:
obtaining an interrupt vector corresponding to a received interrupt; if the received interrupt is a regular interrupt, enabling interrupts in the processor so that a PNMI can be received While handling the regular interrupt, executing a regular interrupt handler using the interrupt sector as an input thereto, and disabling interrupts in the processor; and if the received interrupt is a PNMI, executing a PNMI interrupt handler using the interrupt vector as an input thereto.