Importance

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Abstract

An address translation apparatus comprises: entry storage means for storing a plurality of entries, each entry containing a virtual page number, a physical page number, and a process identifier which is composed of plural bits; comparison information storage means for storing comparison information which defines a method for comparing a process identifier possessed by a process that is currently executed, with the process identifier in each entry; process comparison means for comprising the process identifier possessed by the process that is currently executed, with the process identifier in the entry, on the basis of the comparison information; and entry retrieval means for retrieving, from the entry storage means, an entry including a virtual page number equal to a virtual page number supplied from the outside, and a process identifier which matches the process identifier of the currently executed process, according to the result of comparison by the process comparison means. Therefore, when a physical memory has a content which can be shared between at least two processes, effective utilization of memory area can be achieved by unifying entries with respect to these processes.

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First Claim