MULTIPROCESSOR SYSTEM FOR RESTRICTING AN ACCESS REQUEST TO A SHARED RESOURCE

In a conventional multiprocessor system, an access right with respect to a shared resource could not be changed in a flexible manner. The present invention provides a multiprocessor system having a first processor element (PE-A) and a second processor element (PE-B), the first processor element (PE-A) and the second processor element (PE-B) independently executing a program, in which the first processor element (PE-A) includes: a central processing unit (CPUa) for performing an operation processing based upon the program; a shared resource (18a) which is shared between the first processor element (PE-A) and the second processor element (PE-B); and a guard unit (16a) for restricting an access request from the second processor element (PE-B) to the shared resource (18a) based upon an access protection range setting value designated by the central processing unit (CPUa).