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:
May. 26, 2020
Filed:
Nov. 29, 2017
Applicant:
Arm Limited, Cambridge, GB;
Inventors:
Håkan Lars-Göran Persson, Lund, SE;
Ian Rudolf Bratt, San Jose, CA (US);
Andrew Brookfield Swaine, Sheffield, GB;
Bruce James Mathewson, Cambridge, GB;
Assignee:
ARM Limited, Cambridge, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/0831 (2016.01); G06F 13/16 (2006.01);
U.S. Cl.
CPC ...
G06F 12/0833 (2013.01); G06F 13/1668 (2013.01); G06F 2212/621 (2013.01);
Abstract
A filter comprises interface circuitry, to intercept coherency protocol transactions exchanged between a master device comprising a first cache and an interconnect for managing coherency between the first cache and at least one other cache or other master device. The filter has filtering circuitry for filtering the coherency protocol transactions in dependence on memory access permission data defining which regions of an address space the master device is allowed to access.