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:
Feb. 25, 2014
Filed:
Feb. 24, 2009
Junji Sakai, Tokyo, JP;
Junji Sakai, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a multiprocessor system with a plurality of Operating Systems (OSs) running thereon, each of the plurality of OSs has a device driver which accesses devices for shared use among the OSs. Each device driver has a task interface part which performs inter-Operating System communication at the Operating System (OS) kernel layer. A first device driver on one of the plurality of OSs includes a device interface part which accesses a device to be operated by a second device driver on a second one of the plurality of OSs. The task interface part of the second device driver receives a device access request from a task running on the second one of the plurality of OSs, adds processing request data to a request queue list of the first device driver, and returns a device access result to the task upon receipt of a notification from the device interface part.