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:
Mar. 29, 2011
Filed:
Jun. 05, 2006
Jay R. Freeman, Palo Alto, CA (US);
Christopher A. Vick, San Jose, CA (US);
Olaf Manczak, Hayward, CA (US);
Michael H. Paleczny, San Jose, CA (US);
Phyllis E. Gustafson, Pleasanton, CA (US);
Jay R. Freeman, Palo Alto, CA (US);
Christopher A. Vick, San Jose, CA (US);
Olaf Manczak, Hayward, CA (US);
Michael H. Paleczny, San Jose, CA (US);
Phyllis E. Gustafson, Pleasanton, CA (US);
Oracle America, Inc., Redwood City, CA (US);
Abstract
The use of a token-based memory protection technique may provide memory protection in a computer system employing memory virtualization. A token-based memory protection technique may include assigning a unique identifier to an application, process, or thread, and associating the identifier with a block of memory allocated to that application, process, or thread. Subsequent to assigning the identifier, a packet requesting access to that block of memory may include a token to be compared to the identifier. A memory controller may be configured to associate the identifier with the block of memory and to compare the token in the memory request packet to the identifier before granting access. If a second block of memory is subsequently allocated to the application, process, or thread, the identifier may be disassociated with the first block of memory and associated with the second block of memory.