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The GIC-600 supports two types of physical interrupt signal.
The two types of physical interrupt signal are:
To set the correct settings for the system, you must program the GICD_ICFGRn and GICR_ICFGR1 registers.
The GIC-600 provides optional synchronizers on every interrupt wire input and also return signals, to enable pulse extenders when sending edge-triggered interrupts across domain boundaries, see 2.5.2 SPI Collator wires.
For more information, see Arm® GICv3 and GICv4 Software Overview and Arm® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0.