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.:

US 9542238 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 10, 2017

Filed:

May. 23, 2013
Applicants:

Kun Xu, Austin, TX (US);

Tommi M. Jokinen, Austin, TX (US);

Zheng Xu, Austin, TX (US);

Inventors:

Kun Xu, Austin, TX (US);

Tommi M. Jokinen, Austin, TX (US);

Zheng Xu, Austin, TX (US);

Assignee:

NXP USA, Inc., Austin, TX (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/46 (2006.01); G06F 9/52 (2006.01); G06F 9/48 (2006.01); G06F 9/50 (2006.01);
U.S. Cl.
CPC ...
G06F 9/526 (2013.01); G06F 9/52 (2013.01); G06F 9/46 (2013.01); G06F 9/4843 (2013.01); G06F 9/4881 (2013.01); G06F 9/5016 (2013.01);
Abstract

A multi-core system configured to execute a plurality of tasks and having a semaphore engine and a direct memory access (DMA) engine capable of selecting, by a task scheduler of a first core, a first task for execution by the first core. In response to a semaphore lock request, the task scheduler of the first core switches the first task to an inactive state and selects a next task for execution by the first core. After the semaphore engine acquires the semaphore lock of the first semaphore, a data transfer request is provided to the DMA engine. In response to the data transfer request, the DMA engine transfers data associated with the locked first semaphore to the entry of the workspace of the first core.


Find Patent Forward Citations

Xu, Kun. (2017). Systems and methods for direct memory access coherency among multiple processing cores (U.S. Patent No. 9542238). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9542238

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