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:
Aug. 03, 1999
Filed:
Apr. 25, 1994
Mark Young, Mountain View, CA (US);
Sun Microsystems, Inc., Mountain View, CA (US);
Abstract
In a computer system comprising a CPU, a cache memory and a main memory wherein the cache memory is virtually addressed, and some of the virtual addresses are alias address to each other, a cache memory controller comprising a cache control logic, a cache tag array, a memory management unit, and an alias detection logic is provided. The cache control logic skips flushing of a cache line if the cache line is corresponding to a memory block in a non-cacheable physical memory page, thereby avoiding unnecessary flushes and allowing the CPU to update the cache memory and the main memory using an improved write through and no write allocate approach that reduces cache flushes.