PURPOSE: To increase the capacity of the buffer storages while suppressing the increase of the hardware quantity and also controlling these buffer storages in a store-in system in regard of a hierarchical memory control system which applies a hierarchical memory including a buffer storage of a CPU, the intermediate buffer storage of a storage controller, and a main storage.
CONSTITUTION: A buffer storage 2 uses the combination of an intra-page real address and the low order part of a logical address as a line address. At the same time, a tag means 7 of an intermediate buffer storage 5 controls the real address and the low order part of the logical address designated by a CPU 1. Meanwhile a storage controller 4 contains a mapping tag means 8 which controls the copy of the tag means of the storage 2 in addition to the means 7 of the storage 5. In such a constitution, the coincidence of data secured between both storages 2 and 5 is controlled.
TONE HIROSADA
MORIOKA TETSUYA
NISHIDA HIDEHIKO
