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:
Feb. 11, 1997
Filed:
Nov. 10, 1994
Ronald N Hilton, Cupertino, CA (US);
Stephen C Magee, San Jose, CA (US);
Jeffrey L Baker, Milpitas, CA (US);
Amdahl Corporation, Sunnyvale, CA (US);
Abstract
A storage unit for a data processing system includes a cache data buffer, a cache tag, and a translation lookaside buffer (TLB). Storage keys are maintained in the TLB with a separate valid bit, which allows a valid translation to be stored upon completion of a translation, even though the key is not yet available. With a valid translation in the TLB entry available, the requesting port is then able to send off a move in request to mainstore right away in parallel with a key request from the translator to the mainstore key array. In the typical case, the key will be returned several cycles ahead of the data, allowing it to be written into the TLB entry and validated in time for the move in data to be successfully bypassed to the requestor as soon as it arrives.