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:
Jun. 20, 1989
Filed:
Oct. 14, 1986
Atsuhiko Nishikawa, Mito, JP;
Yoshihiro Miyazaki, Hitachi, JP;
Masayuki Tanji, Hitachi, JP;
Soichi Takaya, Hitachi, JP;
Shinichiro Yamaguchi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present application invention relates to a method for restarting execution of an instruction interrupted due to a page fault. When a page fault occurs during an execution of an instruction, the pertinent page is loaded from an external storage into the main memory and then the access which has caused the page fault is executed again. After N steps of the microprogram that has executed the page fault access, the page fault exception processing is initiated and at the save/restore operation of the content of the microprogram counter, the content of the microprogram is decremented by N, thereby restarting the execution of the instruction beginning from the step of the microprogram which has achieved the page fault access.