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. 07, 2021
Filed:
May. 31, 2016
Applicant:
Arm Ip Limited, Cambridge, GB;
Inventors:
Alessandro Angelino, London, GB;
Milosch Meriac, Cambridge, GB;
Assignee:
Arm IP Limited, Cambridge, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/54 (2013.01); G06F 21/74 (2013.01); G06F 21/78 (2013.01); G06F 21/79 (2013.01); G06F 21/51 (2013.01); G06F 21/70 (2013.01); G06F 21/52 (2013.01); G06F 21/50 (2013.01); G06F 21/71 (2013.01); G06F 8/61 (2018.01); G06F 9/455 (2018.01); G06F 8/654 (2018.01); G06F 21/57 (2013.01);
U.S. Cl.
CPC ...
G06F 21/54 (2013.01); G06F 21/50 (2013.01); G06F 21/51 (2013.01); G06F 21/52 (2013.01); G06F 21/70 (2013.01); G06F 21/71 (2013.01); G06F 21/74 (2013.01); G06F 21/78 (2013.01); G06F 21/79 (2013.01); G06F 8/63 (2013.01); G06F 8/654 (2018.02); G06F 21/572 (2013.01); G06F 2009/45583 (2013.01);
Abstract
A data processing apparatus having a first secure area and a second secure area coupled by a monitor is provided. The monitor applies security credentials to processing circuitry transitioning from the first secure area to the second secure area to enable the processing circuitry to perform functions in the second secure area. A call gateway comprising a transition instruction and access parameters stored in a trusted storage device is used by the monitor to determine when to applying the security credentials to the processing circuitry. The access parameters comprising a target function or a memory location.