A computer system having cache prefetching capability based on CPU request types

摘要

A computer system (100) is provided which includes a CPU (103), a main memory (107), cache memory (104, 105) and a cache controller (106, 202). The CPU generates control signals indicating whether a CPU request is a request for instruction or data and a second CPU control signal indicating whether a request is for retrieving information from memory or for storing information into the memory. The cache controller includes a prefetch logic (203) which is responsive to type of request from the CPU for determining the amount of data to be prefetched into the cache memory from the main memory.