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:
Mar. 05, 2002
Filed:
Feb. 19, 1999
Peter Guy Middleton, Cambridge, GB;
David Michael Bull, Balsham, GB;
Arm Limited, Cambridge, GB;
Abstract
A data processing system is provided with a processor core that issues virtual addresses VA that are translated to mapped addresses MA by an address translation circuit based upon a predicted address mapping. The mapped address MA is used for a memory access within a memory system . The mapped address MA starts to be used before a mapping validity circuit has determined whether or not the predicted translation was valid. Accordingly, if the predicted address translation turns out to be invalid, then the memory access is aborted. The state of the processor core is preserved either by stretching the processor clock signal or by continuing the processor clock signal and waiting the processor . The memory system then restarts the memory access with the correct translated address.