The ACI supports a fixed address arbitration scheme. The priority is in the same order as the master interfaces are defined in the interconnect configuration script as described in the PrimeCell AXI Configurable Interconnect (PL300) Implementation Guide.

The scheme is partitioned as a separate module, pl300_ArbiterScheme_<name>.v, so that you can modify it if you require an alternative arbitration scheme.

A single arbiter arbitrates between the read and write address channels to minimize lock logic. This means that a slave can only accept simultaneous read and write transactions from the same master.