1. A cache wrap detection apparatus for detecting when entire contents of a cache memory device associated with a processor device in a computing environment have been replaced relative to an identified starting state, said cache wrap detection apparatus comprising: an interface for monitoring signals asserted by said processor device when performing processor cache updates, said signals including update indicator signals for each cache update occurring; and, a cache wrap detection logic means responsive to said update indicator signals for detecting a cache wrap condition, and, generating a cache wrap detection signal when all lines have been overwritten relative to said identified starting state.