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. 26, 2019
Filed:
Feb. 13, 2015
Applicant:
Lenovo (Singapore) Pte, Ltd., New Tech Park, SG;
Inventors:
Assignee:
Lenovo (Singapore) PTE. LTD., New Tech Park, SG;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/57 (2013.01);
U.S. Cl.
CPC ...
G06F 21/572 (2013.01);
Abstract
The malfunction of a system caused by data managed by system firmware is prevented. A firmware ROMis provided with a code area, a default area, and variable areas. Data (CV) fundamental to pre-boot created by a UEFI are written to the variable area. Global variables (GV) defined by the UEFI and data (UV) created by an OS are written to the variable area. The variable area is a recording area capable of being write-locked in the firmware ROM. The UEFI write-locks the variable area after completion of the pre-boot. Thus, the rewriting of CV by the OS can be prevented.