Edge-triggered interrupt conversion in a system employing level-sensitive interrupts

摘要

In an embodiment, a system includes an interrupt controller, one or more CPUs coupled to the interrupt controller, a communication fabric, one or more peripheral devices configured to generate interrupts to be transmitted to the interrupt controller, and one or more interrupt message circuits coupled to the peripheral devices. The interrupt message circuits are configured to generate interrupt messages to convey the interrupts over the fabric to the interrupt controller. Some of the interrupts are level-sensitive interrupts, and the interrupt message circuits are configured to transmit level-sensitive interrupt messages to the interrupt controller. At least one of the interrupts is edge-triggered. The system is configured to convert the edge-triggered interrupt to a level-sensitive interrupt so that interrupts may be handled in the same fashion.

主权项

1. A method comprising:
receiving an edge-triggered interrupt event generated by a peripheral device in a system; converting the edge-triggered interrupt event into a level-sensitive interrupt in the system by an interrupt message circuit that is coupled to receive the edge-triggered interrupt event; and interrupting a processor in the system responsive to the level-sensitive interrupt, the interrupting comprising generating an interrupt message by the interrupt message circuit to deliver the level-sensitive interrupt to an interrupt controller over a communication fabric in the system, and the interrupt message is an interrupt set message.