US Patent 9747225 Interrupt controller

An interrupt controller includes a fabric slave that can receive MMIO operation requests, a plurality of output interrupt lines, a plurality of interrupt registers with each interrupt register corresponding to an output interrupt line, a MMIO routing circuit in communication with the fabric slave and the interrupt registers, a plurality of input interrupt lines for receiving line interrupts, and a line interrupt routing circuit in communication with the input interrupt lines and the interrupt registers. The interrupt registers store data for an interrupt that serves as an indication of the source of the interrupt and/or what task(s) need to be done for the interrupt.