CN107247608A - A kind of operating system implementation method with application software hardware address independence - Google Patents
A kind of operating system implementation method with application software hardware address independence Download PDFInfo
- Publication number
- CN107247608A CN107247608A CN201710399564.0A CN201710399564A CN107247608A CN 107247608 A CN107247608 A CN 107247608A CN 201710399564 A CN201710399564 A CN 201710399564A CN 107247608 A CN107247608 A CN 107247608A
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- application software
- software
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- independence
- operating system
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- 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
- G06F9/445—Program loading or initiating
- G06F9/44568—Immediately runnable code
-
- 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
- G06F9/485—Task life-cycle, e.g. stopping, restarting, resuming execution
-
- 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
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
Abstract
The operating system implementation method with application software hardware address independence that the present invention is provided, compiles generation by application software in the unrelated mode in address first；Embedded system to not supporting virtual memory management, sets the system with hardware address independence to call；Then operating system starts application software by reading the configuration information of application software；Application software carries out information exchange by calling the system of hardware address independence to call with hardware resource.The embedded software system built using this method, realize the complete hardware independence of Embedded Application control software, it can realize that application software supports software to issue respectively with hardware platform, exploitation, test to built-in system software, especially hardware platform improves upgrade job, cost can be reduced, efficiency is improved.
Description
Technical field
The present invention relates to a kind of operating system implementation method with application software hardware address independence.
Background technology
In the embedded system of virtual memory is not supported, application software generally must specify its code in compiling, link
With the loading hardware address of data, if application software is mounted in unspecified address, it is impossible to correct operation.
In current embedded system, if its processor does not support virtual memory management, its software is generally all and hardware
Address correlation, it is accomplished by specifying the hardware address and address data area of operation during compiling link.Even with embedded behaviour
Make system, being called due to the system of offer is realized with generic function method of calling, and application software needs to know that system calls letter
Several address, so its application software part is also related to the address of hardware.In fact, such embedded system is often bottom
Layer hardware driving code and application code are to compile together, one software document that can issue of generation.
Application software can not accomplish unrelated with hardware, when bottom hardware changes, it is necessary to recompilate the whole insertion of generation
Formula system software, is issued again.Increase the test, checking, the cost of issue of software.Especially in safety-related field, correspondence
Require high with control software, supervision is tight, change the supervision of application control software, examine that cost is very high, simply because some of hardware
Replacement of Electronic Components, upgrading cause software to be issued again, can bring about the examination again to whole software systems, substantially increasing this is
System updates, the cost of development.
The content of the invention
The present invention provides a kind of operating system implementation method with application software hardware address independence, existing to solve
The problem of technology is present.
The present invention uses following technical scheme：
Operating system implementation method with application software hardware address independence,
Application software is compiled into generation in the unrelated mode in address；
Embedded system to not supporting virtual memory management, sets the system with hardware address independence to call；
Operating system starts application software by reading the configuration information of application software；Application software is by calling hardware address
The system of independence is called, and information exchange is carried out with hardware resource.
The system with hardware address independence that the embedded system is provided is called, real by software interrupt mode
It is existing：
The different system that embedded system is provided calls the different interrupt number of correspondence software interrupt, and application software needs calling system
When calling, by triggering software interrupt, interrupt number and corresponding system are called into the incoming operating system nucleus of required parameter；
Software interrupt service routine in operating system nucleus takes out interrupt number and incoming parameter, jumps to corresponding system and adjusts
With function and perform, function implementing result returns to application software.
Described information exchange refers to that application software obtains the information that hardware resource is provided, or application software is sent out
Signal.
Operating system resource for needed for application software distributes it according to application software configuration information, by application software
Code is loaded onto run location, starts application software operation；If the position operation that application software is installed at it, is no longer carried out
Loading, directly initiates application software；
It is described the code of application software is loaded onto run location to refer to copy run location to by storage location.
It is described that the code of application software is loaded onto run location and started after application software operation, line code can be entered
Integrality, validity checking.
Beneficial effects of the present invention：The embedded software system built using this method, realizes Embedded Application control
The complete hardware independence of software, it is possible to achieve application software supports software to issue respectively with hardware platform, to embedded system
The exploitation of software, especially test, hardware platform improve upgrade job, can reduce cost, improve efficiency.
Brief description of the drawings
Fig. 1 is flow chart of the invention.
Fig. 2 is architecture diagram of the invention.
Fig. 3 is that traps call schematic diagram.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Application software hardware address independence, refer to application software do not limit its load, the hardware address of run location,
Can correctly it perform.
The present invention is directed to the embedded system for not supporting virtual memory management, it is impossible to realized by existing mode using soft
Application software and bottom can be achieved in the problem of part complete hardware address is unrelated, Stand-alone distribution is run, a solution of proposition
Software（Operating system, driver）It is independently updated, i.e., can realize first using and basic-level support system can upgrade respectively renewal,
Recompilate, update without whole softwares；Secondly, it can be achieved not changing under original software conditions, by increasing application software, carry
For new function.
Specifically include：
Application software is compiled into generation in the unrelated mode in address.
Embedded system to not supporting virtual memory management, sets the system with hardware address independence to call.
Application software carries out information exchange by calling the system of hardware address independence to call.
That is, embedded software operating system of the invention adds the framework mode of application software to set with embedded OS
Meter, two parts are compiled, link, issued respectively.
Application software must be compiled with address independence mode and generated.Current common compiler supports address independence mode
Compiling, such as ARM compilers offer-ropi ,-rwpi, which compile option, to be used to compile the generation execution generation unrelated with particular hardware address
Code.As GCC compiler offer-fPIC options generate the unrelated execution code in address.
The embedded system for not supporting virtual memory management is called there is provided the system with hardware address independence.Than
As present embodiment realizes that system is called with software interrupt mode.The different system that operating system is provided calls correspondence software interrupt
Different interrupt numbers.When application software needs the calling system to call, trigger software interrupt, by storehouse by interrupt number and corresponding system
System calls the incoming operating system nucleus of parameter of needs.Software interrupt service routine in operating system nucleus take out interrupt number and
Incoming parameter, jumps to corresponding system call function and performs, function implementing result returns to application software.Such a mode
In, application software only needs to know the system call number that operating system is provided（That is traps number）, you can reality is called by system
Now to the access of hardware component, the specific address without knowing system call function.
And in a running software, two kinds of address correlation circumstances can be roughly classified into：One is each function of therein and
The address of data storage location, the second is calling the specific address of external function.In the present invention, therein address passes through hardware
The unrelated mode in address compiles realization, the plot of data field before load operating application program it is specified that inter access be all with
Accessed with respect to plot position, be so achieved that the independence of application software therein code and hardware address.And call outer
Refer to that above-mentioned system is called in the specific address of portion's function, the present invention, address independence is realized by traps mode.
As it was previously stated, the system call interfaces interactive information that application software is provided by operating system, completes its function.And
Above-mentioned interactive information refers to：1. application software obtains the information that hardware resource is provided, including collection information, communication data etc.
To hardware resource order, data etc. are sent Deng, 2. application software.
In the present invention, operating system starts application software operation by reading application software configuration information.Application software is matched somebody with somebody
Confidence ceases, can be described using the binary file for starting script or user-defined format application software storage location, run location,
Operation resource requirement relevant information, such as the size of application software, storage location, run location, data segment base etc., information
Content is according to depending on embedded system concrete condition.Operating system passes through specified position or the filename of agreement（Use file
During system）Read application software configuration information.Operating system is according to application software configuration information for needed for application software distributes it
Resource, is loaded onto run location, sets its data segment base etc., then can start application software operation.If application software is at it
The position operation of installation, then load step can be omitted.The loading refers to application software code and is loaded into run location.In some systems
The storage location of software is unable to operation code, it is necessary to application software is loaded into the memory of energy operation code.Such as apply
Program storage is in NANDflash, and this position can not perform code and be run, it is necessary to which application software is loaded into RAM.
Because application software has address independence in the present invention, its loading procedure simply copies operation to by storage location
Position, and without the reorientation of code.Run location code and execution position code content are identicals, simply storage location
Change.Because without being relocated, the beneficial effect that integrality, legitimacy in operation to code are checked can be obtained
Really.And if relocated, operation code is changed, it is clear that such inspection when can not be run.It is above-mentioned right
The inspection of code integrity, legitimacy, is the existing method checked code.Reruned after software needs to relocate
When, existing inspection method can only be carried out in loading procedure or before loading, it is impossible to be carried out in the process of running, because being weighed
Positioning, causes operation code to change, it is impossible to carry out such inspection in operation.
It is abstract, call parameters to embedded system hardware resource that the system that operating system in the present invention is provided, which is called,
It is not related to particular hardware information.Called by system and shield specific hardware information completely, so that application software has had
Full hardware independence.
As the specific embodiment that shielding particular hardware information is called by system, such as to make in one embedded system
Communicated with CAN, now, the CAN controller in the embedded system that hardware objects are assumed that.Using the present invention
Method, set up the operation set of equipment with resource name in operating system and device drives first, application software is logical with resource name
The system of mistake, which is called, finds corresponding operation set, calls equipment operation, completes the access to equipment.For example, to CAN controller resource
Resource name can0, can1 etc. can be named, CAN operation is taken out such as opening, reading and writing, these operations are with some form
Carry is on using resource name as the data structure of mark, and application software accesses CAN device with resource name, and access is called by system
The driver of CAN device completes specific operation.Application software code is not related to the specifying information of specific equipment（Such as register
Address, position definition etc.）, with hardware independence, change CAN controller and have no effect on application software.During this, system is called
The mode of access equipment driving is not limited, using existing mode, together with system is called and compiled with device drives.
Using the above method, independence of the application software to hardware specifying information is realized, when particular hardware changes, Wu Xuxiu
Change application software.
The embedded software system built using this method, the complete hardware for realizing Embedded Application control software is unrelated
Property, it is possible to achieve application software supports that software is issued respectively with hardware platform, exploitation, test to built-in system software, especially
It is that hardware platform improves upgrade job, can reduce cost, improve efficiency.Additionally by application configuration information, can conveniently it adjust
The application function that whole embedded system is provided.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (5)
1. the operating system implementation method with application software hardware address independence, it is characterised in that：
Application software is compiled into generation in the unrelated mode in address；
Embedded system to not supporting virtual memory management, sets the system with hardware address independence to call；
Operating system starts application software by reading the configuration information of application software；Application software is by calling hardware address
The system of independence is called, and information exchange is carried out with hardware resource.
2. according to the method described in claim 1, it is characterised in that：
The system with hardware address independence that the embedded system is provided is called, and is realized by software interrupt mode：
The different system that embedded system is provided calls the different interrupt number of correspondence software interrupt, and application software needs calling system
When calling, by triggering software interrupt, interrupt number and corresponding system are called into the incoming operating system nucleus of required parameter；
Software interrupt service routine in operating system nucleus takes out interrupt number and incoming parameter, jumps to corresponding system and adjusts
With function and perform, function implementing result returns to application software.
3. according to the method described in claim 1, it is characterised in that：Described information exchange refers to that application software obtains hardware money
The information that source is provided, or application software are sent out signal.
4. according to the method described in claim 1, it is characterised in that：The operating system is according to application software configuration information should
Its required resource with software distribution, run location is loaded onto by the code of application software, starts application software operation；If using
The position operation that software is installed at it, then no longer loaded, directly initiate application software；
It is described the code of application software is loaded onto run location to refer to copy run location to by storage location.
5. method according to claim 4, it is characterised in that：It is described that the code of application software is loaded onto run location simultaneously
Start after application software operation, integrality, the validity checking of line code can be entered.
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| CN110837393A (en) * | 2019-11-14 | 2020-02-25 | 北京知道创宇信息技术股份有限公司 | Method and device for manufacturing firmware differential upgrade package and readable storage medium |
| CN110990018A (en) * | 2019-10-29 | 2020-04-10 | 北京全路通信信号研究设计院集团有限公司 | Compiling deployment method, compiling method and compiling system of embedded system |
| CN116450206A (en) * | 2023-06-14 | 2023-07-18 | 飞腾信息技术有限公司 | Software system construction method, device, equipment and computer readable storage medium |
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Application publication date: 20171013 |
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