| 摘要 |
<p>A hierarchical cache memory system (10) efficiently determines inclusion and insures data coherency between two or more memory arrays (16, 18, 22). In memory system (10), a secondary cache (18) stores secondary cache information in a first memory (34) and primary cache inclusion information in a second memory (36). Memory (36) stores only a portion of an information value stored in a primary cache (16) and uses that portion as an index to indicate whether the information value is included in primary cache (16). A second level cache tag value is compared to a first portion and an index is compared to a remaining portion of the information value stored in primary cache (16) using a comparator (38, 40, 42). A logic circuit (44) processes an output of the comparator (38, 40, 42) to determine whether the information value is included in primary cache (16).</p> |
