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. 20, 2011
Filed:
Jan. 11, 2008
Dan F. Greiner, San Jose, CA (US);
Charles W. Gainey, Jr., Poughkeepsie, NY (US);
Lisa C. Heller, Rhinebeck, NY (US);
Damian L. Osisek, Vestal, NY (US);
Erwin Pfeffer, Bavaria, DE;
Timothy J. Slegel, Staatsburg, NY (US);
Charles E. Webb, Wappingers Falls, NY (US);
Dan F. Greiner, San Jose, CA (US);
Charles W. Gainey, Jr., Poughkeepsie, NY (US);
Lisa C. Heller, Rhinebeck, NY (US);
Damian L. Osisek, Vestal, NY (US);
Erwin Pfeffer, Bavaria, DE;
Timothy J. Slegel, Staatsburg, NY (US);
Charles E. Webb, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In an enhanced dynamic address translation facility a virtual address to be translated and an initial origin address of a translation table of the hierarchy of translation tables are used to access a segment table entry containing a format control field and an access validity field. If the format control field is enabled, the segment table entry further contains an access control field and a fetch protection field and a segment-frame absolute address. Fetch operations from the desired block of data are permitted if the program access key associated with the virtual address is equal to the segment access control field.