Apparatus and method for providing an atomic set of data accesses
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United States of America Patent
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Nov 23, 2021
Grant Date -
Aug 22, 2019
app pub date -
Aug 18, 2017
filing date -
Sep 28, 2016
priority date (Note) -
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Abstract
A data processing apparatus 2 includes a cache memory 8 for storing data items to be accessed. Coherency control circuitry 20 controls coherency between data items stored within the cache memory and one or more other copies of the data items stored outside the cache memory. A data access buffer 6 buffers a plurality of data access to respective data items stored within the cache memory. Access control circuitry 20 is responsive to coherency statuses managed by the coherency control circuitry for the plurality of data items to be subject to data access operations to be performed together atomically as an atomic set of data accesses to ensure that the coherency statuses for all of these data items permit all of the atomic set of data accesses to be performed within the cache memory before the set of atomic data accesses are commenced.
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