HARDWARE EXECUTION CONTROL METHOD OF ACCESS TO MEMORY IN COMPUTER USING HARDWARE EXECUTION SEMAPHORE AND OTHER SIMILAR HARDWARE EXECUTION SERIALIZING AND PRIORITIZING MECHANISMS

摘要

PROBLEM TO BE SOLVED: To provide a method of protecting access to a memory and other computer resources made by executing a process and a thread.;SOLUTION: To provide a method and system of a synchronizing and serializing mechanism (802) of a hardware execution, such as semaphore, for controlling access to a memory region (806) in a computer system. In addition to conventional semaphore protocols, the hardware execution semaphore is made a connection with the memory region (806) and protection keys (816 and 818) selected from a pool of protection keys to control access thereby to the memory region (806). The hardware execution semaphore controls insertion and deletion of the protection keys from a protection key register (820) and from an internal data structure and executes an access approval provided by a semaphore protocol.;COPYRIGHT: (C)2003,JPO