WO2011076089A1 - 在嵌入式系统中操作系统的管理方法及装置 - Google Patents
在嵌入式系统中操作系统的管理方法及装置 Download PDFInfo
- Publication number
- WO2011076089A1 WO2011076089A1 PCT/CN2010/079971 CN2010079971W WO2011076089A1 WO 2011076089 A1 WO2011076089 A1 WO 2011076089A1 CN 2010079971 W CN2010079971 W CN 2010079971W WO 2011076089 A1 WO2011076089 A1 WO 2011076089A1
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- Prior art keywords
- operating system
- instruction
- currently running
- switching
- interrupt
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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
- G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
-
- 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
-
- 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
Definitions
- the present invention relates to the field of mobile communications, and in particular, to a management method and apparatus for an operating system in an embedded system.
- BACKGROUND In an embedded system, it is usually required to run multiple operating systems by using multiple CPUs (Central Processing Units). For example, most smartphone platforms use a dual CPU solution to run dual operating systems. One of the CPUs runs the smartphone operating system for interaction with the user; the other CPU runs the MODEM (MOdulator/DEModulator) operating system, which is used to provide users with MODEM features, such as wireless. Protocol stack function.
- CPUs Central Processing Units
- MODEM MODEM/DEModulator
- the cost of the embedded system is generally higher.
- the cost and complexity of the system are reduced by running a dual operating system on a single CPU, such as reducing a set of CPU, FLASH, and SDRAM; reducing the complexity of the dual-core bus interface; and reducing software complexity.
- Virtualization technology is achieved by implementing multiple virtual machines on a single CPU, and the operating system runs on the virtual machine.
- each virtual machine is a logical CPU that can run multiple systems on a single CPU.
- Embodiments of the present invention provide a management method and apparatus for an operating system in an embedded system, which implements running multiple operating systems on a single CPU with less performance loss and lower product complexity.
- the embodiment of the present invention adopts the following technical solutions:
- a system switching device includes:
- a receiving unit configured to receive an interrupt instruction
- a switching unit configured to switch the currently running operating system to a target operating system corresponding to the interrupt instruction.
- the system switching device when multiple operating systems are run on a single CPU, the system switching device uniformly receives an interrupt instruction, and needs to perform an operating system switch according to different interrupt instructions.
- the system switching device saves the currently running operating system state and then switches to the target operating system corresponding to the interrupt instruction.
- the switched target operating system runs directly on the real physical CPU, which not only realizes switching between multiple operating systems on a single CPU, but also avoids implementing the virtual machine by using a virtual machine to simulate the CPU in the prior art. CPU performance loss when running multiple operating systems on the CPU.
- FIG. 1 is a flowchart of a management method of an operating system in an embedded system in Embodiment 1;
- Embodiment 2 is a structural block diagram of a system switching device in Embodiment 1;
- Embodiment 3 is a flow chart of a management method of an operating system in an embedded system in Embodiment 2;
- Fig. 4 is a block diagram showing the structure of a system switching device in the second embodiment.
- the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
- An embodiment of the present invention provides a management method of an operating system in an embedded system, where the embedded system includes at least two operating systems, and the at least two operating systems are run on a single CPU, as shown in FIG. , the method includes the following steps:
- the system switching device receives an interrupt instruction. Since the at least two operating systems are run on a single CPU, the system switching device calls the interrupt processing program of the operating system to process the interrupt instruction by uniformly accepting all or part of the interrupt processing program of the operating system. Instead of the interrupt handler being called directly by the operating system. When an interrupt instruction arrives, the interrupt instruction is uniformly received by the system switching device instead of being received by the currently running operating system, thereby avoiding that the received interrupt instruction cannot be executed under the currently running operating system. Dealing with the problem.
- the system switching device After receiving the interrupt instruction, the system switching device saves the currently running operating system state when it is determined that the operating system is required to be switched according to the interrupt instruction. Since the interrupt instruction includes a corresponding target operating system identifier, different interrupt instructions are processed corresponding to different operating systems, and the identifier may be determined by determining It is determined by which operating system the interrupt instruction is executed. Then save the currently running operating system state, and it is convenient and quick to restore to the operating system before the switching when it is necessary to restore the currently running operating system.
- the system switching device switches the currently running operating system to a target operating system corresponding to the interrupt instruction. Different interrupt instructions are processed corresponding to different operating systems. When the received interrupt instruction is not corresponding to the currently running operating system, the system switching device can conveniently switch to the target operating system corresponding to the received interrupt instruction. , ensuring that the received interrupt instruction is processed by the correct operating system. After the switching of the system switching device, the operating system before the switching is saved, temporarily suspended, and the target operating system after the switching is directly run on a single CPU, which solves the CPU performance loss caused by the virtual machine simulation. . In addition, since the above method has small modifications to the plurality of operating systems, the workload for maintaining the plurality of operating systems is greatly reduced, and the complexity of the post-maintenance work of the embedded system is reduced.
- an embodiment of the present invention further provides a system switching apparatus.
- the apparatus includes: a receiving unit 21, a saving unit 22, and a switching unit 23.
- the receiving unit 21 is configured to receive an interrupt instruction. Different interrupt instructions correspond to different operating systems.
- the saving unit 22 is configured to save the currently running operating system state.
- the saving unit 22 saves the currently running operating system state, and can conveniently and quickly restore to the operating system before the switching when it is necessary to restore the currently running operating system.
- the switching unit 23 is configured to switch the currently running operating system to the target operating system corresponding to the interrupt instruction.
- the target operating system switched by the switching unit 23 will run directly on a single CPU. This enables multiple operating systems to run on a single CPU with less performance loss and lower product complexity.
- the embedded system includes at least two operating systems.
- This embodiment assumes that the application scenario is that a single CPU runs dual operating systems on the smart phone platform, one of which is an application operating system running the application, and the other is another A MODEM operating system that provides wireless protocol stack functionality.
- the interrupt instruction may be a first instruction sent by the operating system or a second instruction sent by the operating system.
- the interrupt instruction when the interrupt instruction is the first instruction sent by the operating system externally,
- the example details the management method of the operating system in the embedded system. As shown in FIG. 3, the method includes the following steps:
- the system switching device when an operation command comes, the system switching device uniformly receives the operation instruction, and determines the operation Whether the instruction is an interrupt instruction. Receiving the operation instruction uniformly by the system switching device can avoid the problem that the processing operation cannot be processed when the received operation instruction cannot be executed under the currently running operating system.
- the operation instruction when it is determined that the operation instruction is not an interrupt instruction, it indicates that the currently running operating system directly executes the operation instruction. For example, when the operation instruction is assumed to be a user's key instruction, after the currently running application operating system receives the user's key instruction, since the user key instruction is executed by the application operating system, there is no need to switch the operating system at this time.
- the user button instruction may be directly executed by the currently running application operating system.
- the operation instruction is an interrupt instruction
- the first instruction may be a user key instruction executed under an application operating system or a download instruction, a call connection request instruction, or the like executed under the MODEM operating system.
- the interrupt instruction is from a first instruction external to the currently running operating system
- the received first instruction is an instruction to perform a download task
- the operating system is assumed to be
- the operating system since the received first instruction is an instruction to execute a download task, the first instruction needs to be executed under the MODEM operating system, and then the operating system needs to be switched.
- the system switching device saves the currently running operating system state before performing the switching of the operating system.
- the system switching device switches the currently running application operating system to a MODEM operating system that executes the first instruction.
- the system switching apparatus instructs the switched MODEM operating system to execute the first instruction.
- the MODEM operating system executes the downloaded instruction by calling an interrupt handler.
- the operation instruction is an interrupt instruction
- determine that the interrupt instruction is not from the first instruction external to the currently running operating system
- the second instruction of the operating system for switching the operating system. Since the interrupt instruction can also be sent to the operating system
- the second instruction such as: when the currently running operating system wants to give up the control of the CPU, the active switching between the operating systems is implemented through a switching interface.
- the second instruction implements a function of switching to a target operating system corresponding to the second instruction. If the currently running application operating system wants to switch directly to the MODEM operating system.
- the currently running operating system state is saved.
- the system switching device switches the currently running operating system to a target operating system corresponding to the interrupt instruction.
- the operating system before the switching is saved and temporarily suspended, and the target operating system after switching is directly run on a single CPU, which solves the CPU performance loss caused by virtual machine simulation.
- the modification of the multiple operating systems is small, the workload of maintaining the multiple operating systems is greatly reduced, and the complexity of the post-maintenance work of the embedded system is reduced, and the implementation is realized. Run multiple operating systems on a single CPU with less performance loss and lower product complexity.
- the embodiment of the present invention further provides a system switching apparatus.
- the apparatus includes: a receiving unit 41, a determining unit 42, a saving unit 43, a switching unit 44, a first indicating unit 45, and a second indicating unit 46.
- the receiving unit 41 is configured to uniformly receive the operation instruction when an operation instruction comes.
- the system switching device uniformly receives the operation instruction instead of receiving it through the currently running operating system, thereby avoiding the problem that the received operation instruction cannot be processed when it cannot be executed under the currently running operating system.
- the determining unit 42 is used to determine whether the operation instruction received by the receiving unit 41 is an interrupt instruction.
- the second indication unit 46 is configured to instruct the currently operating operating system to directly execute the operation instruction.
- the determining unit 42 determines that the operation instruction is an interrupt instruction
- the determining unit 42 is further configured to determine whether the interrupt instruction is a first instruction from outside the currently running operating system.
- the saving unit 43 is configured to save the currently running operating system state. In order to facilitate the quick recovery to the operating system before the switching when it is necessary to restore the currently running operating system.
- the switching unit 44 is configured to switch the currently running operating system to a target operating system that executes the first instruction.
- the first indication unit 45 is configured to instruct the target operating system after the switching to execute the first instruction.
- the receiving unit 41 is further configured to receive a third instruction, where the third instruction is used to switch back from the target operating system to the currently running operation, when the target operating system after the switching is executed. system.
- the switching unit 44 is further configured to switch the target operating system back to the currently running operating system according to the third instruction and the saved current running operating system state. Not only can the current operating system be switched to the target operating system, but also the operating system running above is quickly switched when the operating system before the switching needs to be restored.
- the operation instruction may also be a second instruction sent by the current operating system, for example, when the currently running operating system wants to voluntarily give up the control of the CPU, the active switching between the operating systems is implemented through a switching interface, then the judgment is performed.
- the unit 42 determines that the operation instruction is an interrupt instruction
- the determining unit 42 is further configured to determine whether the interrupt instruction is a second instruction for switching the operating system sent by the currently running operating system.
- the saving unit 43 is further configured to save the currently running operating system state when the interrupt instruction is a second instruction sent by the currently operating operating system for switching the operating system.
- the switching unit 44 is further configured to switch the currently running operating system to a target operating system indicated by the second instruction. This achieves the goal of running multiple operating systems on a single CPU.
- the system switching apparatus may be used for a mobile terminal that includes an operating system in an embedded system, and at least two operating systems in the mobile terminal are configured to perform switching on a single CPU, where the mobile terminal may It is a smart mobile phone, personal digital assistant PDA, etc.
- the embodiments of the present invention are mainly applied to the field of mobile communications, and realize a single CPU running multiple operating systems in an embedded system with less performance loss and lower product complexity.
- the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. .
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
- a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012543460A JP2013515293A (ja) | 2009-12-24 | 2010-12-18 | 組み込みシステムにおけるオペレーティングシステムを管理するための方法と装置 |
EP10838652A EP2492810A4 (en) | 2009-12-24 | 2010-12-18 | METHOD AND DEVICE FOR MANAGING OPERATING SYSTEMS IN AN EMBEDDED SYSTEM |
US13/493,296 US20120246370A1 (en) | 2009-12-24 | 2012-06-11 | Method and apparatus for managing operating systems in embedded system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910261692A CN101782861A (zh) | 2009-12-24 | 2009-12-24 | 在嵌入式系统中操作系统的管理方法及装置 |
CN200910261692.4 | 2009-12-24 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/493,296 Continuation US20120246370A1 (en) | 2009-12-24 | 2012-06-11 | Method and apparatus for managing operating systems in embedded system |
Publications (1)
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WO2011076089A1 true WO2011076089A1 (zh) | 2011-06-30 |
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PCT/CN2010/079971 WO2011076089A1 (zh) | 2009-12-24 | 2010-12-18 | 在嵌入式系统中操作系统的管理方法及装置 |
Country Status (6)
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US (1) | US20120246370A1 (zh) |
EP (1) | EP2492810A4 (zh) |
JP (1) | JP2013515293A (zh) |
KR (1) | KR20120076381A (zh) |
CN (1) | CN101782861A (zh) |
WO (1) | WO2011076089A1 (zh) |
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CN107533477A (zh) * | 2015-04-27 | 2018-01-02 | 宇龙计算机通信科技(深圳)有限公司 | 应用程序的运行方法、应用程序的运行装置和终端 |
CN105117272B (zh) * | 2015-08-21 | 2018-05-01 | 浪潮集团有限公司 | 一种操作系统管理器、虚拟机和操作系统间切换方法 |
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CN109101283A (zh) * | 2018-07-17 | 2018-12-28 | 北京元心科技有限公司 | Gpu设备的控制方法、装置及电子设备 |
US10778709B2 (en) | 2018-10-31 | 2020-09-15 | International Business Machines Corporation | Cloud-native extensibility provided to security analytics |
CN109542829B (zh) * | 2018-11-29 | 2023-04-25 | 北京元心科技有限公司 | 多系统中gpu设备的控制方法、装置及电子设备 |
CN113094101A (zh) * | 2019-12-19 | 2021-07-09 | 成都鼎桥通信技术有限公司 | 双域系统的控制方法、装置、电子设备和存储介质 |
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Also Published As
Publication number | Publication date |
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JP2013515293A (ja) | 2013-05-02 |
CN101782861A (zh) | 2010-07-21 |
EP2492810A4 (en) | 2013-01-02 |
US20120246370A1 (en) | 2012-09-27 |
KR20120076381A (ko) | 2012-07-09 |
EP2492810A1 (en) | 2012-08-29 |
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