A cache and method of maintaining cache coherency in a data processing system are described. The data processing system includes a system memory, a plurality of processors, and a plurality of caches coupled to an interconnect. According to the method, a first data item is stored in a first of the caches...http://www.google.fr/patents/US6275908?utm_source=gb-gplus-shareBrevet US6275908 - Cache coherency protocol including an HR state
