Alibaba Group Holding Limited
Processor and interrupt controller

Abstract:

Embodiments of the present disclosure provide an interrupt controller in a processor, comprising: an interrupt sampling circuitry configured to receive one or more interrupts from one or more interrupt sources that are communicatively coupled to the interrupt controller; and an arbitration circuitry configured to select a to-be-responded interrupt from the received one or more interrupts, the arbitration circuitry comprising: a selection circuitry configured to select from the one or more interrupts a highest-priority interrupt that has a highest priority among the one or more interrupts; and a threshold comparison circuitry communicatively coupled to the selection circuitry, the threshold comparison circuitry configured to compare the priority of the highest-priority interrupt with a preset priority threshold, wherein the arbitration circuitry is configured to select the highest-priority interrupt as the to-be-responded interrupt in response to the threshold comparison circuitry determining that the priority of the highest-priority interrupt is higher than the preset priority threshold.