CACHE MISS HANDLING FOR READ OPERATIONS IN DATA PROCESSING SYSTEMS

In a data processing system comprising a cache system configured to transfer data stored in a memory system to a processor and vice-versa, a processing unit operable to read data from a cache of the cache system can send a read request for data to the cache. The cache system, in response to the read request, determines whether the requested data is present in the cache. When the requested data is present in the cache, the cache system returns the data from the cache to the processing unit and invalidates the entry for the data in the cache. When the requested data is not present in the cache, the cache system returns an indication of that to the processing unit, without the cache system sending a request for the data towards the memory system.