2.3.9. Lock support

At configuration time, you can indicate whether an AXI3 master or slave must support lock transactions. The AXI4 protocol does not support locked transactions. The CoreLink NIC-400 Network Interconnect infrastructure includes logic to support locked transactions at all points along the path to and from the masters and slaves.

See Lock transactions for information on the scope of lock support for AHB-Lite slave interfaces.

At a switch master interface with lock support, logic exists that:


The NIC supports lock functionality for 32-bit data beat accesses. You can lock beats of other sizes, but if they are upsized or downsized, it is possible that leading write data is output from the sizing function for the unlocking transaction before all the locked transactions have completed.

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