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. 22, 2015
Filed:
Jan. 23, 2012
Applicants:
Ryota Miyazaki, Osaka, JP;
Masahiko Saito, Osaka, JP;
Inventors:
Ryota Miyazaki, Osaka, JP;
Masahiko Saito, Osaka, JP;
Assignee:
Panasonic Intellectual Property Corporation of America, Torrance, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/08 (2006.01); G06F 9/46 (2006.01);
U.S. Cl.
CPC ...
G06F 12/0804 (2013.01); G06F 9/468 (2013.01); G06F 2212/1052 (2013.01);
Abstract
A virtual machine system comprises: a processor for executing a secure operating system and a normal operating system; and a cache memory. The cache memory stores data in a manner that allows for identification of whether the data has been read from a secure storage area of an external main memory. The cache memory writes back data to the main memory in a manner that reduces the number of times data is intermittently written back to the secure storage area which occurs when the processor is executing the normal operating system.