3.2. Security extensions support

The Interrupt Controller permits all implemented interrupts to be individually defined as Secure or Non-secure.

You can program Secure interrupts to use either the IRQ or FIQ interrupt mechanism of a Cortex-A9 processor through the FIQen bit in the ICPICR Register. Non-secure interrupts are always signalled using the IRQ mechanism of a Cortex-A9 processor.

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