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:
Nov. 18, 2008
Filed:
Dec. 21, 2004
Ryuta Nakanishi, Kyoto, JP;
Hazuki Okabayashi, Osaka, JP;
Tetsuya Tanaka, Kyoto, JP;
Shuji Miyasaka, Osaka, JP;
Ryuta Nakanishi, Kyoto, JP;
Hazuki Okabayashi, Osaka, JP;
Tetsuya Tanaka, Kyoto, JP;
Shuji Miyasaka, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The cache memory in the present invention is a cache entry having, in a correspondence with a cache entry which holds a data unit of caching, a valid flag indicating whether or not the cache entry is valid, and a dirty flag indicating whether or not the cache entry has been written into. The cache memory in the present invention includes an altering unit which, based on an instruction from a processor, sets, in the cache entry, an address serving as a tag and sets the valid flag, without loading data from a memory, or resets the dirty flag in a state in which the cache entry holds rewritten data that has not been written back.