1. A cache control device comprising: a command control section for receiving a deterioration report of a cache in a central processing unit and generating a cache flush mode initiation signal; a software interrupt section for interrupting a supply of commands from software in response to the cache flush mode initiation signal; a flush command generating section for repeatedly generating fetch requests for executing flushing of cache data to the cache in response to the cache flush mode initiation signal; and a flush address generating section for flushing cache data in response to the cache flush mode initiation signal.