2.2.5. GIC-500 Stream Protocol Interface

For each cluster or group of cores, one upstream and one downstream 16-bit AMBA AXI4-Stream interface is provided.

The GIC-500 GIC Stream Protocol Interface consists of a pair of AXI4-Stream interfaces that the GIC-500 uses to send interrupts to the core and receive notifications when the core activates interrupts. There is a pair of physical interfaces, one in each direction, for each cluster.

The GIC Stream interfaces use the prefix icd to indicate the master interface, and icc to indicate the slave interface. The GIC Stream master interface uses the icdtdest signal to direct packets to one core within the cluster. The GIC Stream slave interface uses the icctid signal to determine which core within the cluster sent a packet.

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