CN106371863A - Embedded multi-operation system boot program upgrading method - Google Patents
Embedded multi-operation system boot program upgrading method Download PDFInfo
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- CN106371863A CN106371863A CN201610710912.7A CN201610710912A CN106371863A CN 106371863 A CN106371863 A CN 106371863A CN 201610710912 A CN201610710912 A CN 201610710912A CN 106371863 A CN106371863 A CN 106371863A
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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
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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Abstract
The invention discloses an embedded multi-operation system boot program upgrading method. A pre-boot program is added before an embedded operation system boot program and a PRE-Loader is pre-solidified in an independent read-only memory, so that errors caused by manual writing of error programs in a using process are avoided. In a PRE-Loader execution process, a serial port of a target board, a Flash, a memory, stack and the like are initialized, so that an operator can upgrade and load boot programs of multiple operation systems through the serial port, writes the boot programs in a Nor flash, and upgrades and loads operation system kernels stored in the Nor flash and root file systems stored in a Nand flash through the boot programs, the function of booting and upgrading the operation systems is realized, the systems are prevented from being destructed due to reasons of power failure and the like in the upgrading process of the operation system boot programs, and the risk of program stealing caused by reservation of a JTAG port on the target board is lowered.
Description
Technical field
The present invention relates to a kind of upgrade method of embedded OS, specifically a kind of multiple embedded operation systems that upgrade
The method of system bootstrap, belongs to field of computer technology.
Background technology
In today of automaticity increasingly raising, embedded device is ubiquitous, with the raising of automaticity, more
The built-in equipment operation coming the more embedded OS.In general, the startup of system is required for boot-loader's
Guiding, when boot-loader is not normally functioning, whole system just can not work completely, so boot-loader is whole
Very important status is occupied in system.
Embedded OS type is a lot, and each have their own advantage, conventional operating system include linux,
Vxworks, ucos ii (micro control operation system two) etc., their startup is required for boot-
The guiding of loader, upgrading boot-loader typically has a following several method:
Method one: before making Target Board, nor flash chip is not also welded on Target Board, now first with burning
Boot-loader programming in nor flash, is then welded on Target Board by piece machine；
Method two: had the boot-loader program that can run in Target Board, boot-loader is made by programming
There is the function of upgrading, therefore, during boot-loader is transferred internal memory operation, is upgraded by boot-loader and order
Order, by new boot-loader file write nor flash, is restarted Target Board and can be run new boot-loader program,
Thus completing to upgrade；
Method three: design certain physical circuit and connect, the jtag interface in objective chip is drawn, such that it is able to pass through
Jtag interface is upgraded to boot-loader.
However, being analyzed finding prior art Shortcomings to three kinds of conventional upgrade methods, specifically as follows:
Method one can only be using once before nor flash chip is not also welded on Target Board, after burn-oning
Method one is lack scope for their abilities it is impossible to realize the upgrading to boot-loader again；
Method two is a kind of the most frequently used mode, it using to be boot-loader be loaded into during execution
In internal memory, the boot-loader file in flash can be written over.But there is problems that, when in upgrading boot-
Power-off during loader, the boot-loader loss in internal memory and the boot-loader file in nor flash are broken
Bad；Or the boot-loader file of upgrading is problematic, the boot-loader after upgrading after power-off restarting cannot hold
OK, the consequence that both of these case leads to is exactly that system again cannot start；
Method three is upgraded to boot-loader by jtag mouth, can be with upgrading power down and file in solution two
The problem of mistake is it is only necessary to again upgrade.But it there is problems that, by jtag upgrading need to design extra electricity
Road, additionally, the process of upgrading is more complicated loaded down with trivial details, upgrading required time is longer it is even more important that it needs on Target Board
Stay jtag mouth, this brings serious potential safety hazard to the program of Target Board.
Content of the invention
For above-mentioned prior art existing problems, the present invention provides a kind of bootstrap upgrading of embedded multiple operating system
Method, for solving unreliable, the unsafe problem existing for existing upgrade method, can also provide a kind of upgrading to draw simultaneously
The method leading several operation systems.
The present invention is achieved through the following technical solutions a kind of above-mentioned purpose: bootstrap liter of embedded multiple operating system
Level method, this bootstrap upgrade method comprises the steps:
1) add one section of pre-boot program (pre- before the bootstrap (boot-loader) of embedded OS
Loader), and by pre-loader it is solidified in independent read only memory rom, simultaneously electricity in given processor on hardware
Run pre-loader afterwards first；
2) pre-loader completes initialization operation to the serial ports of objective chip, flash, internal memory and storehouse, then waits
User input instruction, input instruction includes updated boot programs and bootload program；
3) if user selects updated boot programs, the bootstrap under computer specified path is write by system by serial ports
Enter in Target Board nor flash, if user selects bootload program, the bootstrap in nor flash is added by system
It is downloaded in internal memory and executes, and then upgrade, guide operating system nucleus (kernel) and root file system (root file
System, rootfs)；
4) if user does not have input instruction, system executes default action and loads the bootstrap of designated storage area and hold
OK.
Further, described pre-loader program enables to whole embedded system upgrading or loads several operation systems
Bootstrap, and then guide several operation systems
Further, described bootstrap is written to Target Board (nor flash) from computer by serial ports.
Further, the work completing in described pre-loader includes initialization string mouth, flash, internal memory, storehouse, specifies
Input is specified with accepting user in bootstrap memory block.
The bootstrap of storage several operation systems and system kernel in described Target Board (nor flash), and
The root file system of corresponding operating system is stored, so that system can run several operation systems in nand flash.
The invention has the beneficial effects as follows: 1) the method can be upgraded, load the bootstrap of multiple embedded OSs,
Thus guiding several operation systems, realize the switching of several operation systems on same set of hardware system, and easy to operate；2) by
In serial ports being initialized by pre-loader before bootstrap, therefore serial ports updated boot programs can be passed through, and not
Need initialization but the jtag mouth of complex operation, go jtag button also to greatly increase the safety of program simultaneously；3) due to
Pre-loader program Solidification, in read only memory, is difficult to be damaged due to artificial maloperation, so the reliability of system
Property very high, avoid the bootstrap of operating system in escalation process due to the guiding journey of power-off or mistake of having upgraded simultaneously
Sequence, will not lose or because mistake upgrading damages in power down.
Brief description
Fig. 1 is embedded multiple operating system overall structure block diagram；
Fig. 2 is the workflow diagram of pre-loader of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As depicted in figs. 1 and 2, a kind of bootstrap upgrade method of embedded multiple operating system, the liter of this bootstrap
Level method comprises the steps:
1) add one section of pre-boot program pre- before bootstrap boot-loader of embedded OS
Loader, and pre-boot program pre-loader is solidified in independent read only memory, designated treatment on hardware simultaneously
Pre-boot program pre-loader is run first after electricity on device；
2) pre-boot program pre-loader completes initialization behaviour to the serial ports of objective chip, flash, internal memory and storehouse
Make, then wait user input instruction, input instruction includes updated boot programs and bootload program；
3) if user selects updated boot programs, the bootstrap under computer specified path is write by system by serial ports
Enter in Target Board nor flash, if user selects bootload program, the bootstrap in nor flash is added by system
It is downloaded in internal memory and executes, and then upgrade, guide operating system nucleus and root file system；
4) if user does not have input instruction, system executes default action and loads the bootstrap of designated storage area and hold
OK.In pre-loader implementation procedure, user selects to need loaded which kind of bootstrap, and then this bootstrap goes to load phase
The operating system answered and root file system, thus realize the upgrading of several operation systems.
Technical scheme after improving as the present invention is: described pre-loader program enables to whole embedded system
Upgrading or the bootstrap loading several operation systems, and then guide several operation systems.
Technical scheme after improving as the present invention is: described bootstrap is written to Target Board by serial ports from computer
In nor flash, without jtag fever writes, this operating process is made to be greatly simplified；Because pre-loader makes
Bootstrap can be upgraded by serial ports, without staying jtag interface therefore on Target Board, it is to avoid program is stolen, whole system
The safety of system greatly improves.
Technical scheme after improving as the present invention is: the work completing in described pre-loader program includes initializing
Serial ports, flash, internal memory, storehouse, specify bootstrap memory block and accept user specify input.
Technical scheme after improving as the present invention is: stores several operation systems in described Target Board nor flash
Bootstrap, and store kernel and the root file system of corresponding operating system in nand flash, so that system can
To run several operation systems.
Technical scheme after improving as the present invention is: can prestore multiple embedded operations in nor flash
The bootstrap of system, convenient guiding several operation systems.
Embodiment one
A kind of bootstrap upgrade method of embedded multiple operating system, this upgrade method includes:
1) add pre-loader pre-boot program before embedded OS bootstrap.This program leaves one in
In the read only memory of piece independence, and be before this read only memory is welded on Target Board by program Solidification wherein.?
In the hardware designs of Target Board, run this pre-loader program, do so by hardware given processor first after electricity, it is to avoid
The generation of situations such as during upgrading boot-loader, system cut-off damages to system, and pre-loader program due to
Be premature cure in read only memory, therefore also it will be made to be destroyed due to faulty operation, the degree of reliability of system obtains
To raising；
2) pre-loader initializes to the serial ports of objective chip, flash, internal memory, storehouse etc. first, then waits
User input instruction, optional instruction includes updated boot programs, bootload program etc.；
3) if user selects updated boot programs, the bootstrap under computer specified path is write by system by serial ports
Enter in Target Board nor flash, if user selects bootload program, the bootstrap in nor flash is added by system
It is downloaded in internal memory and executes, and then upgrade, guide operating system nucleus and root file system etc..
4) due to the introducing of pre-loader, and the continuous increase of current memory capacity, can be in the nor of Target Board
Deposit bootstrap and the system kernel of several operation systems in flash, and deposit corresponding root file in nand flash
System, in pre-loader implementation procedure, user selects to need loaded which kind of bootstrap, and then this bootstrap goes to load
Corresponding operating system and root file system, realize the function of multiple operating system；
5) if user does not have input instruction, system executes the bootstrap of default action loading designated storage area simultaneously
Execution.
Upgrading method of the present invention can easily be upgraded several operation systems, such as linux, vxworks etc., by
In different operating system by respective advantage, different projects is different to the demand of operating system, and same project is not
Also different to the demand of operating system under same time or purpose, method proposed by the invention can be very easily multiple
Switch between operating system.
Secondly as pre-loader program Solidification is in one piece of read only memory, it is never because of operation
The maloperation of person is destroyed, and this guarantees the guiding journey of mistake of still having upgraded regardless of power-off during system upgrade
Sequence, will not result in Target Board and cannot start and upgrade it is only necessary to re-start.
Additionally, user can by jtag read objective chip in bin file, therefore stay on Target Board jtag mouth to
Target Board brings the potential safety hazard of program, and in the today so valuing trade secret, this is necessarily worthless, in the present invention
In the safety of the system that improves of upgrading is carried out to bootstrap by serial ports.
Embodiment provided above is the better embodiment of the present invention, is only used for the convenient explanation present invention, not to this
Bright make any pro forma restriction, any those of ordinary skill in the art, if without departing from the carried skill of the present invention
In the range of art feature, made, using disclosed technology contents, the Equivalent embodiments that local is changed or modified, and
Without departing from the technical characteristic content of the present invention, all still fall within the range of the technology of the present invention feature.
Claims (5)
1. a kind of bootstrap upgrade method of embedded multiple operating system is it is characterised in that the upgrade method of this bootstrap
Comprise the steps:
1) added one section of pre-boot program pre-loader before bootstrap boot-loader of embedded OS,
And pre-boot program pre-loader is solidified in independent read only memory rom, simultaneously in given processor on hardware
Pre-boot program pre-loader is run first after electricity；
2) pre-boot program pre-loader completes initialization operation to the serial ports of objective chip, flash, internal memory and storehouse, so
Wait user input instruction afterwards, input instruction includes updated boot programs and bootload program；
3) if user selects updated boot programs, the bootstrap under computer specified path is written to by system by serial ports
In Target Board nor flash, if user selects bootload program, the boot program loads in nor flash are arrived by system
In internal memory and execute, so upgrade, guiding operating system nucleus and root file system；
4) if user does not have input instruction, system executes default action and loads the bootstrap of designated storage area and execute.
2. a kind of embedded multiple operating system according to claim 1 bootstrap upgrade method it is characterised in that: institute
State pre-loader program and enable to whole embedded system upgrading or the bootstrap loading several operation systems, Jin Eryin
Lead several operation systems.
3. the bootstrap upgrade method of a kind of embedded multiple operating system according to claim 1 and 2, its feature exists
In: described bootstrap is written to Target Board nor flash from computer by serial ports.
4. a kind of embedded multiple operating system according to claim 1 bootstrap upgrade method it is characterised in that: institute
State the work completing in pre-loader program to include initialization string mouth, flash, internal memory, storehouse, specify bootstrap memory block
Specify input with accepting user.
5. a kind of embedded multiple operating system according to claim 1 bootstrap upgrade method it is characterised in that: institute
State bootstrap and the system kernel storing several operation systems in Target Board nor flash, and deposit in nand flash
The root file system of storage corresponding operating system, so that system can run several operation systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610710912.7A CN106371863A (en) | 2016-08-24 | 2016-08-24 | Embedded multi-operation system boot program upgrading method |
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| CN201610710912.7A CN106371863A (en) | 2016-08-24 | 2016-08-24 | Embedded multi-operation system boot program upgrading method |
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Cited By (7)
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|---|---|---|---|---|
| CN108108179A (en) * | 2017-12-15 | 2018-06-01 | 中国船舶重工集团公司第七0七研究所 | A kind of TMS32C6713 burning program FLASH methods based on serial ports |
| CN108829442A (en) * | 2017-05-04 | 2018-11-16 | 杭州海康威视数字技术股份有限公司 | Program starts method and device |
| CN108958777A (en) * | 2018-08-03 | 2018-12-07 | 广州云海智联科技有限公司 | A kind of wireless charging device and control method |
| CN109409032A (en) * | 2018-10-24 | 2019-03-01 | 山东超越数控电子股份有限公司 | A kind of system kernel analysis method of Safety-Critical System |
| CN109814885A (en) * | 2019-01-11 | 2019-05-28 | 厦门亿联网络技术股份有限公司 | A kind of bare die method for burn-recording based on XMODEM |
| CN110795159A (en) * | 2019-10-30 | 2020-02-14 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Method for preventing vehicle-mounted ECU from being mistakenly upgraded and incapable of being refreshed and storage device |
| CN111258604A (en) * | 2020-01-14 | 2020-06-09 | 深圳市有为信息技术发展有限公司 | Bootloader upgrading system and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108829442A (en) * | 2017-05-04 | 2018-11-16 | 杭州海康威视数字技术股份有限公司 | Program starts method and device |
| CN108829442B (en) * | 2017-05-04 | 2021-12-14 | 杭州海康威视数字技术股份有限公司 | Program starting method and device |
| CN108108179A (en) * | 2017-12-15 | 2018-06-01 | 中国船舶重工集团公司第七0七研究所 | A kind of TMS32C6713 burning program FLASH methods based on serial ports |
| CN108958777A (en) * | 2018-08-03 | 2018-12-07 | 广州云海智联科技有限公司 | A kind of wireless charging device and control method |
| CN109409032A (en) * | 2018-10-24 | 2019-03-01 | 山东超越数控电子股份有限公司 | A kind of system kernel analysis method of Safety-Critical System |
| CN109814885A (en) * | 2019-01-11 | 2019-05-28 | 厦门亿联网络技术股份有限公司 | A kind of bare die method for burn-recording based on XMODEM |
| CN110795159A (en) * | 2019-10-30 | 2020-02-14 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Method for preventing vehicle-mounted ECU from being mistakenly upgraded and incapable of being refreshed and storage device |
| CN110795159B (en) * | 2019-10-30 | 2023-07-21 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Method for preventing vehicle-mounted ECU from being updated by mistake and being incapable of being re-brushed and storage device |
| CN111258604A (en) * | 2020-01-14 | 2020-06-09 | 深圳市有为信息技术发展有限公司 | Bootloader upgrading system and method |
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