agent_ccc0_ccc_llc_control

         When the CCC is connected to a Last Level Cache, it has some unique programmable features that allows the two to interact more closely.  This register allows programmable control of these features.
The CM bit is the enable for the Cache Maintenance Operation propagation.  A Cache Maintenance Operation flushes or invalidates a cache line from the coherency domain.  This can allow interaction with non-coherent devices that access the slave directly.  Since a Last Level Cache can hold additional data, it may be necessary to flush or invalidate lines from the LLC to memory.  When this register bit is set, the CCC will propagate any Cache Maintenance Operations to the LLC, where the cache can take the specified action.  When this bit is set to zero, the Cache Maintenance Operations will not be propagated.
The WE bit is the enable for Write Evict propagation.  In ACE protocol rev E, the WriteEvict command was created in order to write clean data to a downstream cache, such as the Last Level Cache.  This allows the cache to only allocate a line when it is dropped by one of the ACE masters, allowing a better utilization of RAM storage.  When the WE bit is set to 1, the WriteEvict will be propagated from the CCC to the LLC.  If set to 0, the WriteEvict will drop the data and only update the CCC directory to indicate that the master has given up its copy of the line.