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:
Jan. 29, 2008
Filed:
Nov. 17, 2003
Simon Charles Watt, Cambridge, GB;
Christopher Bentley Dornan, Cambridge, GB;
Luc Orion, Mouans Sartoux, FR;
Nicolas Chaussade, Mouans-Sartoux, FR;
Lionel Belnet, Villeneuve-Loubet, FR;
Stephane Eric Brochier, Chateauneuf de Grasse, FR;
David Hennah Mansell, Usk, GB;
Dominic Hugo Symes, Cambridge, GB;
Simon Charles Watt, Cambridge, GB;
Christopher Bentley Dornan, Cambridge, GB;
Luc Orion, Mouans Sartoux, FR;
Nicolas Chaussade, Mouans-Sartoux, FR;
Lionel Belnet, Villeneuve-Loubet, FR;
Stephane Eric Brochier, Chateauneuf de Grasse, FR;
David Hennah Mansell, Usk, GB;
Dominic Hugo Symes, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
In a system supporting more than one operating system, a data processing thread executing on a first operating system may be subject to an interrupt which triggers interrupt handling on a second operating system. When that interrupt handling is completed on the second operating system, the first operating system is resumed using a return interrupt. The return interrupt specifies the data processing thread which is active on the second operating system such that an appropriate task switch or resumption may be made on the first operating system. The technique is particularly well suited to systems utilising a secure operating system and a non-secure operating system executing on the same hardware.