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. 20, 2002
Filed:
Nov. 10, 1999
Applicant:
Inventors:
Christopher John Nicol, Springwood N.S.W., AU;
Kanwar Jit Singh, Hazlet, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ;
U.S. Cl.
CPC ...
G06F 1/200 ;
Abstract
A cache implements bank-by-bank locking to keep critical code from being flushed out of the cache. A register is maintained to rank the banks from the most recently used to the least recently used. Ordinarily, when code needs to be moved into the cache, the least recently used bank is flushed, the code is moved into that bank, and the register is updated to identify that bank as the most recently used. However, if a bank is designated in a bypass vector as being locked, that bank is bypassed in the maintenance of the register and is thus never identified as the bank to be flushed.