Cache control system which permanently inhibits local but not global parameter data writes to main memory
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United States of America Patent
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Apr 30, 1996
Issued Date -
N/A
app pub date -
Mar 9, 1995
filing date -
Sep 30, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A data cache memory is dynamically allocated as a global area which can be accessed in tasks other than a current task, and a local area which can be accessed in only a specific task. In the global area, data processing is controlled by the write through or copy back technique, in the same manner as in a conventional system. With respect to an access to the local area, an access is allowed to only the data cache memory, but is inhibited in relation to a main memory. For this reason, the tag section of the data cache memory includes a flag indicating a local or global area, and a task number storage field indicating a task in which a secured local area is accessed.
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