Bridge, processor unit, information processing apparatus, and access control method

Abstract

There is provided a technique of accessing a memory of a processor from a peripheral device, thereby the security is ensured while efficiency is being pursued. An address converterincludes an address conversion table for converting an effective address into a physical address. The address conversion table stores the effective address to which an area in a memory of a processor unitis allocated to each peripheral deviceand identification information of an access source to which access permission is given, in association with each other. When the peripheral deviceaccesses, the address converterdetermines to permit access to the effective address under the condition that the device identification information, included in an access request packet, by which the peripheral devicecan be uniquely identified, matches the identification information of the access source corresponding to the effective address, in the address conversion table, designated by the access request packet.