LOCAL MEMORY AND MAIN MEMORY MANAGEMENT IN A DATA PROCESSING SYSTEM

摘要

A data processing system (2) is provided including a local memory (4) and a main memory (6). The local memory (4) is accessed by a data engine (8) using local- memory physical addresses. The main memory (6) is accessed by a microprocessor (10) using main-memory addresses. A translation store (16) serves to store physical address TAGs indicating the mapping between data stored within the local memory (4) and corresponding data stored within the main memory (6). A coherency management mechanism (18) serves to use MESI coherency control data to manage the coherency between data values stored both in the local memory (4) and the main memory (6).