Invention Grant
- Patent Title: Management of data processing security in a secondary processor
- Patent Title (中): 二次处理器中数据处理安全性的管理
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Application No.: US13777338Application Date: 2013-02-26
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Publication No.: US08959304B2Publication Date: 2015-02-17
- Inventor: Dominic Hugo Symes , Ola Hugosson , Donald Felton , Sean Tristram Ellis
- Applicant: ARM Limited
- Applicant Address: GB Cambridge
- Assignee: ARM Limited
- Current Assignee: ARM Limited
- Current Assignee Address: GB Cambridge
- Agency: Nixon & Vanderhye P.C.
- Priority: GB1206759.1 20120417
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/14

Abstract:
A data processing apparatus comprises a primary processor, a secondary processor configured to perform secure data processing operations and non-secure data processing operations and a memory configured to store secure data used by the secondary processor when performing the secure data processing operations and configured to store non-secure data used by the secondary processor when performing the non-secure data processing operations, wherein the secure data cannot be accessed by the non-secure data processing operations, wherein the secondary processor comprises a memory management unit configured to administer accesses to the memory from the secondary processor, the memory management unit configured to perform translations between virtual memory addresses used by the secondary processor and physical memory addresses used by the memory, wherein the translations are configured in dependence on a page table base address, the page table base address identifying a storage location in the memory of a set of descriptors defining the translations, wherein the page table base address is defined by the primary processor and cannot be amended by the secondary processor.
Public/Granted literature
- US20130275701A1 MANAGEMENT OF DATA PROCESSING SECURITY IN A SECONDARY PROCESSOR Public/Granted day:2013-10-17
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