Cache memory and control method thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsRyuta Nakanishi, Hazuki Okabayashi, Tetsuya Tanaka, Tokuzo Kiyohara
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Abstract
The cache memory in the present invention includes a prediction unit 39 which predicts, based on the progress of the memory access outputted from the memory, a line address which should be prefetched next. The prediction unit 39 includes: a prefetch unit 414 which prefetches data of the predicted line data, from the memory to the cache memory; and a touch unit 415 which sets the predicted line address to the cache entry, as a tag, and validates the valid flag, without loading data from the memory into the cache memory
Claims18
A cache memory system comprising:
- a condition generation unit operable to generate a condition concerning a state of a processor;
- a judgment unit operable to judge whether or not a current state of the processor satisfies the condition;
- an address generation unit operable to generate an address to be manipulated;
- and
- a manipulation unit operable to manipulate a cache using the address generated by said address generation unit, when said judgment unit judges that the condition is satisfied,
- wherein said condition generation unit is operable to generate a new condition in the case where said judgment unit judges that the condition is satisfied.
(canceled)
A cache memory control method comprising:
- a condition generation step of generating a condition concerning a state of a processor;
- a judgment step of judging whether or not a current state of the processor satisfies the condition;
- an address generation step of generating an address to be manipulated;
- and
- a manipulation step of manipulating a cache using the address generated in said address generation steps when it is judged in said judgment step that the condition is satisfied,
- wherein in said condition generation step, a new condition is generated in the case where it is judged in said judgment step that the condition is satisfied.
Dependencies are inferred from the claim text.