ARM Technical Support Knowledge Articles

What are the possible values for ARLOCKP, AWLOCKP on ARM1176 ?

Applies to: ARM1176


ARM1176 has an internal exclusive monitor, which is used for non-shared memory – in this case
there is no exclusive lock transfer on the AXI port. If memory is shared (shared normal, shared
device or strongly ordered), there will be exclusive AXI transfer type with LOCK signal used.

The AXI peripheral port is used for non-shared device so does not have any exclusive access. It
can have SWP transfers. AWLOCK=00, ARLOCK=00 or 10 (SWP). This is documented in table A-8.

Article last edited on: 2010-05-10 13:51:01

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