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:
Oct. 02, 1990
Filed:
Dec. 23, 1987
Ikuo Uchihori, Fuchu, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A virtual address register for storing a virtual address is arranged in a translation lookaside buffer control system. An artihmetic operation circuit is coupled to the virtual address register and performs adding, EX-ORing, and the like of the contents of two first fields which do not overlap each other. A TLB address register is coupled to the arithmetic operation circuit and the virtual address register, and stores the contents of a second field which does not overlap those of the first fields and output data from the arithmetic operation circuit. A translation lookaside buffer (TLB) is coupled to the TLB address register. The TLB is addressed by the content of the address register, stores address translation data in each entry, and translates a virtual address into a physical address, at high speed. A controller is coupled to the virtual address register and the TLB address register, and determines whether a virtual address specified by the address translation data stored in the entry designated by the contents of the TLB address register coincides with the virtual address stored in the virtual address register. The controller replaces the contents of a corresponding entry of the TLB when the virtual addresses do not coincide with each other.