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:
Aug. 07, 2007
Filed:
Dec. 08, 2003
Noritoshi Yoshiyama, Yokohama, JP;
Seiichi Kawano, Kanagawa, JP;
Hirohide Komiyama, Kanagawa, JP;
Tetsuji Nakamura, Yokohama, JP;
Noritoshi Yoshiyama, Yokohama, JP;
Seiichi Kawano, Kanagawa, JP;
Hirohide Komiyama, Kanagawa, JP;
Tetsuji Nakamura, Yokohama, JP;
Lenovo Singapore Pte Ltd, Singapore, SG;
Abstract
An information processor having a normal-operation mode in which coherence control is performed for making data in a cache memory of a processor identical to data in a main memory and a power-saving mode in which the coherence control is suppressed to lower the power consumption from power consumption in the normal-operation mode and entering the normal-operation mode when an input/output device accesses the main memory in the power-saving mode includes an attribute setting module for setting a device area of the main memory, accessed by the input/output device of the information processor to a non-cacheable attribute for exempting said device area from said coherence control even in the normal-operation mode; an operation mode setting module for allowing the input/output device to access the device area while keeping the operation mode of the information processor in the power-saving mode when the input/output device requests access to the device area in the power-saving mode.