2.1. RISC-V PLIC Operation Parameters

General PLIC operation parameter register blocks are defined in this spec, those are:

  • Interrupt Priorities registers:
    The interrupt priority for each interrupt source.

  • Interrupt Pending Bits registers:
    The interrupt pending status of each interrupt source.

  • Interrupt Enables registers:
    The enablement of interrupt source of each context.

  • Priority Thresholds registers:
    The interrupt priority threshold of each context.

  • Interrupt Claim registers:
    The register to acquire interrupt source ID of each context.

  • Interrupt Completion registers:
    The register to send interrupt completion message to the associated gateway.

    Below is the figure of PLIC Operation Parameter Block Diagram,

PLIC Operation Parameter Block Diagram

PLICArch