Class categorized storage circuit for storing non-cacheable data until receipt of a corresponding terminate signal

摘要

A microprocessor (62) for coupling to an external read/write memory (70) having an addressable storage space for storing data. The microprocessor includes a data storage circuit (76) for storing a portion of the data, where that portion of data comprises non-cacheable data. The microprocessor further includes a class storage circuit (80) for storing a class identifier corresponding to the portion of the non-cacheable data, as well as an input (TERMINATE) for receiving a terminate signal and an input (CLASS) for receiving a class signal. Lastly, the microprocessor includes an indicator (82) for indicating that the portion of the non-cacheable data in the data storage circuit is expired in response to assertions of the terminate signal and the class signal matching the class identifier.