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:
Nov. 16, 2021
Filed:
Jun. 11, 2018
Arm Limited, Cambridge, GB;
Gareth Rhys Stockwell, Cambridge, GB;
Jason Parker, Sheffield, GB;
Matthew Lucien Evans, Cambridge, GB;
Martin Weidmann, Haverhill, GB;
ARM Limited, Cambridge, GB;
Abstract
Memory access circuitry () enforces ownership rights for memory regions. A given memory region is associated with an owner realm specified from multiple realms, each realm corresponding to a portion of at least one software process executed by processing circuitry (). The owner realm has a right to exclude other realms from accessing data within the memory region. Realm management circuitry () accesses a realm management tree storing realm management data for at least two realms in a tree structure having a variable number of levels. The realms are identified using a realm identifier which has a variable number of variable length bit portions each providing an index into a given level of the realm management tree.