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:
Dec. 13, 2022
Filed:
Aug. 16, 2021
Arm Limited, Cambridge, GB;
Alexander Alfred Hornung, Cambridge, GB;
Andrew Brookfield Swaine, Sheffield, GB;
Arm Limited, Cambridge, GB;
Abstract
Requester circuitryissues an access request specifying a target physical address (PA) and a target physical address space (PAS) identifier identifying a target PAS. Prior to a point of physical aliasing (PoPA), a pre-PoPA memory system componenttreats aliasing PAs from different PASs which actually correspond to the same memory system resource as if they correspond to different memory system resources. A post-PoPA memory system componenttreats the aliasing PAs as referring to the same memory system resource. When the target PA and target PAS of a read-if-hit-pre-PoPA request hit in a pre-PoPA cache, a data response is returned to the requester circuitry. If the read-if-hit-pre-PoPA request misses in the pre-PoPA cache, a no-data response is returned. The read-if-hit-pre-PoPA request is safe to issue speculatively while waiting for security checks to be performed, improving performance.