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. 28, 2017
Filed:
Oct. 21, 2013
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Yukio Yamazaki, Utsunomiya, JP;
Masaaki Saito, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A method of identifying a cause of an interrupt related to an interrupt indication received from an interrupt indicating circuit in a processor, includes the steps of having the interrupt indicating circuit provided with a plurality of lowest-layer registers having a plurality of bits, each of the plurality of bits corresponding to the cause of the interrupt, and one or more upper-layer registers for aggregating the plurality of lowest-layer registers; forming a hierarchical structure with the one or more upper-layer registers and the plurality of lowest-layer register; and identifying the cause of the interrupt by having the processor read the upper-layer registers and the lowest-layer registers in order following the hierarchical structure.