BlackBerry Limited
Method and system for task-based cache isolation

Abstract:

A method of task-based cache isolation includes: storing, in association with a cache controller, (i) a plurality of mask descriptors representing respective portions of a cache memory, and (ii) for each mask descriptor, a mask identifier; receiving, at the cache controller, a memory transaction request containing a memory address and an active one of the mask identifiers; retrieving, at the cache controller, an active one of the mask descriptors corresponding to the active mask identifier; generating, based on the memory address and the active mask descriptor, an index identifier corresponding to a cache element within the portion of the cache memory represented by the active mask descriptor; and applying the memory transaction to the cache memory at the index identifier.