The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2004
Filed:
Mar. 29, 2000
Shinya Kato, Kawasaki, JP;
Toshiyuki Muta, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A cache control apparatus for an information processing system having a cache memory with a plurality of ways is disclosed, in which the hardware amount is reduced and the delay of the response time is minimized. At the time of cache access, each way is indexed by time division, and when updating the cache, a way to be updated is designated thereby to update the cache tag and the cache data. The data indexed by time division can be judged for a hit each time of indexing or alternatively, the data of all the ways are judged for a hit after being held in a buffer. The data indexed by time division is sent to the reader as response without regard to the way, and when a miss is judged, a cancel signal is sent thereby to minimize the access time delay. Further by predicting the address of a way, the access time can be further improved.