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:
Sep. 02, 2008
Filed:
Oct. 20, 2005
Thomas Philip Speier, Holly Springs, NC (US);
James Norris Dieffenderfer, Apex, NC (US);
Thomas Andrew Sartorius, Raleigh, NC (US);
Jaya Prakash Subramaniam Ganasan, Youngsville, NC (US);
Thomas Philip Speier, Holly Springs, NC (US);
James Norris Dieffenderfer, Apex, NC (US);
Thomas Andrew Sartorius, Raleigh, NC (US);
Jaya Prakash Subramaniam Ganasan, Youngsville, NC (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Semaphore operation manages exclusive access to a memory that is shared by a plurality of processing elements. Semaphore reservation status for exclusive access by a processing element is monitored by a memory controller. To clear an obsolete reservation status, a command signal is transmitted for a write operation to the memory while prohibiting update of the contents of a memory. The reservation status at the controller is changed from a reservation state to a non-reservation state in response to receipt of the command signal.