MY137182A - Control of access to a memory by a device - Google Patents

Control of access to a memory by a device

Info

Publication number
MY137182A
MY137182A MYPI20034401A MY137182A MY 137182 A MY137182 A MY 137182A MY PI20034401 A MYPI20034401 A MY PI20034401A MY 137182 A MY137182 A MY 137182A
Authority
MY
Malaysia
Prior art keywords
memory
secure
data
access
processing apparatus
Prior art date
Application number
Inventor
Simon Charles Watt
Lionel Belnet
David Hennah Mansell
Nicolas Chaussade
Peter Guy Middleton
Original Assignee
Advanced Risc Mach Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0226879A external-priority patent/GB0226879D0/en
Priority claimed from GB0226875A external-priority patent/GB0226875D0/en
Priority claimed from GB0303446A external-priority patent/GB0303446D0/en
Application filed by Advanced Risc Mach Ltd filed Critical Advanced Risc Mach Ltd
Publication of MY137182A publication Critical patent/MY137182A/en

Links

Landscapes

  • Storage Device Security (AREA)

Abstract

THE PRESENT INVENTION PROVIDES A DATA PROCESSING APPARATUS AND METHOD FOR CONTROLLING ACCESS TO A MEMORY . THE DATA PROCESSING APPARATUS HAS A SECURE DOMAIN AND A NON-SECURE DOMAIN, IN THE SECURE DOMAIN THE DATA PROCESSING APPARATUS HAVING ACCESS TO SECURE DATA WHICH IS NOT ACCESSIBLE IN THE NON-SECURE DOMAIN. THE DATA PROCESSING APPARATUS COMPRISES A DEVICE COUPLED TO A MEMORY VIA A DEVICE BUS,AND OPERABLE, WHEN AN ITEM OF DATA IN THE MEMORY IS REQUIRED BY THE DEVICE, TO ISSUE ONTO THE DEVICE BUS A MEMORY ACCESS REQUEST PERTAINING TO EITHER THE SECURE DOMAIN OR THE NON-SECURE DOMAIN. THE MEMORY IS OPERABLE TO STORE DATA REQUIRED BY THE DEVICE, AND CONTAINS SECURE MEMORY FOR STORING SECURE DATA AND NON-SECURE MEMORY FOR STORING NON-SECURE DATA.IN ACCORDANCE WITH THE PRESENT INVENTION, THE DATA PROCESSING APPARATUS FURTHER COMPRISES PARTITION CHECKING LOGIC COUPLED TO THE DEVICE BUS AND OPERABLE WHENEVER THE MEMORY ACCESS REQUEST AS ISSUED BY THE DEVICE PERTAINS TO THE NON-SECURE DOMAIN, TO DETECT IF THE MEMORY ACCESS REQUEST IS SEEKING TO ACCESS THE SECURE MEMORY AND UPON SUCH DETECTION TO PREVENT THE ACCESS SPECIFIED BY THAT MEMORY REQUEST. THIS APPROACH SIGNIFICANTLY IMPROVES THE SECURITY OF DATA CONTAINED WITHIN A SECURE PORTION OF MEMORY.
MYPI20034401 2002-11-18 2003-11-17 Control of access to a memory by a device MY137182A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0226879A GB0226879D0 (en) 2002-11-18 2002-11-18 Apparatus and method for controlling access to a memory
GB0226875A GB0226875D0 (en) 2002-11-18 2002-11-18 Control of access to a memory by a device
GB0303446A GB0303446D0 (en) 2002-11-18 2003-02-14 Apparatus and method for controlling access to a memory

Publications (1)

Publication Number Publication Date
MY137182A true MY137182A (en) 2009-01-30

Family

ID=35873167

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20034401 MY137182A (en) 2002-11-18 2003-11-17 Control of access to a memory by a device

Country Status (4)

Country Link
IL (1) IL168336A (en)
MY (1) MY137182A (en)
RU (1) RU2005115088A (en)
TW (1) TWI312253B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7673345B2 (en) 2005-03-31 2010-03-02 Intel Corporation Providing extended memory protection
GB2442023B (en) * 2006-09-13 2011-03-02 Advanced Risc Mach Ltd Memory access security management
US9021590B2 (en) * 2007-02-28 2015-04-28 Microsoft Technology Licensing, Llc Spyware detection mechanism
US8861434B2 (en) * 2010-11-29 2014-10-14 Alcatel Lucent Method and system for improved multi-cell support on a single modem board
WO2013103341A1 (en) * 2012-01-04 2013-07-11 Intel Corporation Increasing virtual-memory efficiencies
US9141559B2 (en) 2012-01-04 2015-09-22 Intel Corporation Increasing virtual-memory efficiencies

Also Published As

Publication number Publication date
IL168336A (en) 2010-04-29
RU2005115088A (en) 2006-01-20
TW200417216A (en) 2004-09-01
TWI312253B (en) 2009-07-11

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