8.1.4. Exclusive L2 cache

The Cortex-A9 processor can be connected to an L2 cache that supports an exclusive cache mode. This mode must be activated both in the Cortex-A9 processor and in the L2 cache controller.

In this mode, the data cache of the Cortex-A9 processor and the L2 cache are exclusive. At any time, a given address is cached in either L1 data caches or in the L2 cache, but not in both. This has the effect of greatly increasing the usable space and efficiency of an L2 cache connected to the Cortex-A9 processor. When exclusive cache configuration is selected:

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