INFORMATION PROCESSOR, PROGRAM, RECORDING MEDIUM AND CONTROL CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an information processor or the like allowing reduction of electric power consumption.

SOLUTION: This information processor 10 has a normal operation mode for executing consistency control for bringing contents of a cache memory of a processor into line with contents of a main memory, and a power-saving operation mode for reducing the power consumption as compared with the normal operation mode without executing the consistency control, and changes over the power-saving operation mode to the normal operation mode when an input/output device accesses the main memory in the power-saving operation mode. The information processor 10 has: an attribute setting part setting a device area that is an area accessed by the input/output device of the information processor, of the main memory, to a non-cacheble attribute wherein the consistency control is not executed even in the normal operation mode; and an operation mode setting part making the input/output device access the device area with the operation mode of the information processor kept in the power-saving operation mode when the input/output device requests the access to the device area in the power-saving operation mode.

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