21.8.1.4 Interrupt Status

Interrupt Pending registers (AIC_IPR) represent the state of the interrupt lines, whether they are masked or not. AIC_IMR can be used to define the mask of the interrupt lines.

The Interrupt Status register (AIC_ISR) reads the number of the current interrupt (see the section Priority Controller) and the Core Interrupt Status register (AIC_CISR) gives an image of the nIRQ and nFIQ signals driven on the processor.

Each status referred to above can be used to optimize the interrupt handling of the systems.