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:
Dec. 31, 1996
Filed:
Apr. 21, 1995
Applicant:
Inventors:
Avigdor Willenz, Saratoga, CA (US);
Yiftach Tzori, Sunnyvale, CA (US);
Assignee:
Integrated Device Technology, Inc., Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395473 ; 395445 ; 395466 ;
Abstract
A structure and a method provide data integrity for a multiprocessor system having a cache memory and a snoop tag cache. In one embodiment, the snoop tag cache copies the tags of a primary cache. Whenever a write operation occurs, the snoop tag cache is accessed to determine if the accessed tag matches a predetermined portion of the address of the memory location on which the write operation is performed. If so, a signal is sent to the CPU associated with the primary cache so that the corresponding entries in the primary cache and the snoop tag cache can be invalidated.