GB2395313B - Task following between multiple operating systems - Google Patents

Task following between multiple operating systems

Info

Publication number
GB2395313B
GB2395313B GB0325016A GB0325016A GB2395313B GB 2395313 B GB2395313 B GB 2395313B GB 0325016 A GB0325016 A GB 0325016A GB 0325016 A GB0325016 A GB 0325016A GB 2395313 B GB2395313 B GB 2395313B
Authority
GB
United Kingdom
Prior art keywords
operating systems
multiple operating
task following
task
following
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
GB0325016A
Other languages
English (en)
Other versions
GB2395313A (en
GB0325016D0 (en
Inventor
Simon Charles Watt
Christopher Bentley Dornan
Luc Orion
Nicolas Chaussade
Lionel Belnet
Stephane Eric Sebasti Brochief
David Hennah Mansell
Dominic Hugo Symes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARM Ltd
Original Assignee
ARM Ltd
Advanced Risc Machines 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 GBGB0226874.6A external-priority patent/GB0226874D0/en
Priority claimed from GB0303449A external-priority patent/GB0303449D0/en
Application filed by ARM Ltd, Advanced Risc Machines Ltd filed Critical ARM Ltd
Publication of GB0325016D0 publication Critical patent/GB0325016D0/en
Publication of GB2395313A publication Critical patent/GB2395313A/en
Application granted granted Critical
Publication of GB2395313B publication Critical patent/GB2395313B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/48—Program initiating; Program switching, e.g. by interrupt
    • G06F9/4806—Task transfer initiation or dispatching
    • G06F9/4843—Task transfer initiation or dispatching by program, e.g. task dispatcher, supervisor, operating system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1458—Protection against unauthorised use of memory or access to memory by checking the subject access rights
    • G06F12/1491—Protection against unauthorised use of memory or access to memory by checking the subject access rights in a hierarchical protection system, e.g. privilege levels, memory rings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G06F9/45558—Hypervisor-specific management and integration aspects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G06F9/45558—Hypervisor-specific management and integration aspects
    • G06F2009/45583—Memory management, e.g. access or allocation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45533—Hypervisors; Virtual machine monitors
    • G06F9/45558—Hypervisor-specific management and integration aspects
    • G06F2009/45587—Isolation or security of virtual machine instances

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Storage Device Security (AREA)
GB0325016A 2002-11-18 2003-10-27 Task following between multiple operating systems Expired - Lifetime GB2395313B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0226874.6A GB0226874D0 (en) 2002-11-18 2002-11-18 Switching between secure and non-secure processing modes
GB0303449A GB0303449D0 (en) 2002-11-18 2003-02-14 Task following between multiple operating systems

Publications (3)

Publication Number Publication Date
GB0325016D0 GB0325016D0 (en) 2003-12-03
GB2395313A GB2395313A (en) 2004-05-19
GB2395313B true GB2395313B (en) 2005-11-23

Family

ID=29738108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0325016A Expired - Lifetime GB2395313B (en) 2002-11-18 2003-10-27 Task following between multiple operating systems

Country Status (2)

Country Link
JP (1) JP4299108B2 (ja)
GB (1) GB2395313B (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7076637B2 (en) * 2003-10-29 2006-07-11 Qualcomm Inc. System for providing transitions between operating modes of a device
US7424601B2 (en) * 2004-07-07 2008-09-09 Yongyong Xu Methods and systems for running multiple operating systems in a single mobile device
EP3598304A1 (en) * 2006-02-09 2020-01-22 Texas Instruments Incorporated Virtual cores and hardware-supported hypervisor integrated circuits, systems, methods and processes of manufacture
JP2009070327A (ja) * 2007-09-18 2009-04-02 Panasonic Corp 情報端末及び情報端末の制御方法
JP4678396B2 (ja) * 2007-09-25 2011-04-27 日本電気株式会社 仮想マシンモニタをモニタするコンピュータとその方法、および仮想マシンモニタモニタプログラム
GB2460393B (en) 2008-02-29 2012-03-28 Advanced Risc Mach Ltd A data processing apparatus and method for controlling access to secure memory by virtual machines executing on processing circuitry
GB2552519A (en) * 2016-07-27 2018-01-31 Undo Ltd Debugging Systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038073A1 (en) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Embedded system
EP1031924A2 (en) * 1999-02-19 2000-08-30 Hitachi, Ltd. Computer executing multiple operating system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038073A1 (en) * 1998-01-21 1999-07-29 Nokia Mobile Phones Limited Embedded system
EP1031924A2 (en) * 1999-02-19 2000-08-30 Hitachi, Ltd. Computer executing multiple operating system

Also Published As

Publication number Publication date
JP4299108B2 (ja) 2009-07-22
GB2395313A (en) 2004-05-19
JP2004171567A (ja) 2004-06-17
GB0325016D0 (en) 2003-12-03

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20231026