Command receiving unit from an external access requesting entity, together with IOID to identify the address and the access requesting entity to be accessed, it receives a command to access the data. By IOID, access judgment unit, access requesting entity determines whether there is a right to access to the purpose of the access destination. Access decision unit, for each page as a basic management units of the logical address in the space of the processor, determines access permission for the access requesting entity.
.FIELD 1