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. 18, 2024
Filed:
Oct. 21, 2022
Shanghai Zhaoxin Semiconductor Co., Ltd., Shanghai, CN;
Yingbing Guan, Shanghai, CN;
Junjie Zhang, Beijing, CN;
Fangong Gong, Beijing, CN;
Yanting Li, Beijing, CN;
Yipu Liu, Shanghai, CN;
SHANGHAI ZHAOXIN SEMICONDUCTOR CO., LTD., Shanghai, CN;
Abstract
A processor with protection of an isolated memory and protection method for the isolated memory accessible only by a trusted core are shown. A processor has a trusted core with a right to access an isolated memory planned on a system memory, a normal core prohibited from accessing the isolated memory, and a last-level cache shared by the trusted core and the normal core. The in-core cache structure of the normal core and the last-level cache are included in a hierarchical cache system. In response to a memory access request issued by the normal core, the hierarchical cache system determines whether the memory access request hits the isolated memory and, if yes, the hierarchical cache system rejects the memory access request.