CN104899091B - A kind of intelligence embedded device multiple operating system switching method - Google Patents
A kind of intelligence embedded device multiple operating system switching method Download PDFInfo
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- CN104899091B CN104899091B CN201510383431.5A CN201510383431A CN104899091B CN 104899091 B CN104899091 B CN 104899091B CN 201510383431 A CN201510383431 A CN 201510383431A CN 104899091 B CN104899091 B CN 104899091B
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Abstract
The invention discloses a kind of methods for realizing multiple operating system selective actuation in intelligent embedded device, it is first that user divides multiple operating system subregion in memory, the load run function for adding EEPROM flag bit handling function in U-Boot and being write for each operating system, in QT environment, os starting menu is set, an operating system is selected to start in os starting menu, U-Boot calling EEPROM flag bit handling function reads the flag bit of the operating system, call the load run function of the corresponding operating system of the flag bit, start-up operation system.In the present invention, handover management system independently of U-Boot, compensate for U-Boot can not omnibearing management hardware the shortcomings that, it is possible to provide more comprehensive interactive function facilitates carry out Function Extension.
Description
Technical field
The present invention relates to a kind of intelligent embedded device multiple operating system switching methods, belong to computer systems technology neck
Domain.
Background technique
Intelligent embedded device such as smart phone, tablet computer etc., because it has the characteristics that frivolous, portable obtain quickly
It is universal.A usual intelligent embedded device can only run a type operating system, and each operation system function is biased to area
Not, as Android, iOS primarily focus on amusement, Windows is then more suitable office.Industry in order to realize polymorphic type operation system
System is run on intelligent embedded device, is typically employed in Bootstrap Commissioning Program and is added user's selection menu, obtains user's choosing
The method for selecting selective actuation operating system after parameter.Bootstrap loader is responsible realization operating system before os starting
The simple program being booted up is guided the restriction of loading procedure based on the multiple operating system handover scheme that this program is realized,
Its scalability, manageability are extremely limited.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of intelligent embedded device multiple operating system switching sides
It is not strong to solve multiple operating system tradition handover scheme scalability, manageability based on bootstrap loader exploitation for method
Problem.
The present invention is that technical solution used by solving its technical problem is：A kind of intelligent embedded device is provided to grasp more
Make system switching method, includes the following steps：
Step 1：By memory partition, storage address is in turn divided into U-Boot subregion and system partitioning, by each operation
The image file of system is successively stored in system partitioning, and personal distance is equipped between the image file of each operating system, according to
The storage address of the image file of each operating system establishes system image partitions of file table, according to the system image partitions of file table
It is that each operating system establishes address of cache macrodefinition respectively in U-Boot subregion；The address of cache macrodefinition includes Nand
The address Flash OS_ADDR, image file size OS_LEN, the memory address OS_RAM_ADDR of image file position and jump address
OS_RAM_BOOT_OFF；
Step 2：EEPROM flag bit handling function is added in U-Boot subregion, and defines the flag bit of each operating system
And handover management system sign position；
Step 3：The load run function for adding each operating system respectively in U-Boot subregion, respectively loads run function
For the image file at the address Nand Flash to be loaded onto memory address OS_RAM_ADDR, and jump to memory address
OS_RAM_ADDR start-up operation system kernel；
Step 4：Os starting menu is set in QT environment, the os starting menu is different for selecting
Operating system；
Step 5：An operating system is selected to start in os starting menu, U-Boot calls EEPROM mark
Bit manipulation function reads the flag bit of the operating system, calls the load run function of the corresponding operating system of the flag bit, opens
Dynamic operating system.
In step 5, before start-up operation system, EEPROM flag bit handling function is called, flag bit is rewritten as switching pipe
Manage system sign position.
The present invention is based on beneficial effects possessed by its technical solution to be：
(1) by the present invention in that being patrolled according to starting with handover management system intelligent embedded device polymorphic type operating system
It collects and carries out unified subregion, guidance operation, this method is enabled to be conveniently accomplished the switching of polymorphic type operating system；
(2) image file of each operating system is successively stored in the system partitioning of memory and safety is arranged by the present invention
Interval, establishes system image partitions of file table according to the storage address of the image file of each operating system, in U-Boot subregion
It is that each operating system establishes address of cache macrodefinition respectively, and adds respectively for each operating system according to system image partitions of file table
Load run function defines flag bit corresponding with each operating system, can reduce the event in traditional " brush machine " operating process
Barrier rate guarantees the stability of polymorphic type operating system switching；
(3) os starting menu is arranged in QT environment in the present invention, it is possible to provide more humanization alternate surface and expansion
The stronger switching system of malleability makes up the selection menu mutual based on bootstrap loader exploitation and experiences not strong and poor expandability
The shortcomings that.
Detailed description of the invention
Fig. 1 is the system structure diagram for realizing the method for the invention.
Fig. 2 is the flow chart of the method for the invention.
Fig. 3 is storage address partition table of the embodiment of the present invention.
Fig. 4 is os starting menu interface diagram.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The present invention provides a kind of intelligent embedded device multiple operating system switching methods, referring to Fig. 2, including following step
Suddenly：
Step 1：By memory partition, storage address is in turn divided into U-Boot subregion and system partitioning, by each operation
The image file of system is successively stored in system partitioning, and personal distance is equipped between the image file of each operating system, according to
The storage address of the image file of each operating system establishes system image partitions of file table, according to the system image partitions of file table
It is that each operating system establishes address of cache macrodefinition respectively in U-Boot subregion；The address of cache macrodefinition includes Nand
The address Flash OS_ADDR, image file size OS_LEN, the memory address OS_RAM_ADDR of image file position and jump address
OS_RAM_BOOT_OFF；
Step 2：EEPROM flag bit handling function is added in U-Boot subregion, and defines the flag bit of each operating system
And handover management system sign position；
Step 3：The load run function for adding each operating system respectively in U-Boot subregion, respectively loads run function
For the image file at the address Nand Flash to be loaded onto memory address OS_RAM_ADDR, and jump to memory address
OS_RAM_ADDR start-up operation system kernel；
Step 4：Os starting menu is set in QT environment, the os starting menu is different for selecting
Operating system；
Step 5：An operating system is selected to start in os starting menu, U-Boot calls EEPROM mark
Bit manipulation function reads the flag bit of the operating system, calls the load run function of the corresponding operating system of the flag bit, opens
Dynamic operating system.
In step 5, before start-up operation system, EEPROM flag bit handling function is called, flag bit is rewritten as switching pipe
Manage system sign position.
Using intelligent embedded device multiple operating system switching method of the invention can be applied to it is as shown in Figure 1 based on
The intelligent embedded device of Linux.Intelligent embedded device hardware configuration is：FriendlyARM company Mini6410 development board
(Samsung S3C6410 processor, ARM1176JZF-S kernel, dominant frequency 533MHz/667MHz, 1GB Nand Flash storage
Device, 256B IIC interface eeprom memory)
Intelligent embedded device software configuration：
Linux QT (kernel version：2.6.38, using VFS), Android 2.3.4, (file system uses file system
VFS)、Windows CE 6.0、U-Boot 1.1.5。
The first step, by memory partition, as shown in figure 3, the 256KB storage region since the address Nand Flash 0 is deposited
U-Boot program is put, memory space is system partitioning after U-Boot subregion, with personal distance storage Windows CE, switching pipe
Reason system, Linux, android system kernel and file system mirror file, storage sequence have no strict demand.According to each behaviour
The storage address for making the image file of system establishes system image partitions of file table, according to system image partitions of file table in U-
It is that each operating system establishes address of cache macrodefinition respectively in Boot subregion, every type operating system address of cache macrodefinition is mainly wrapped
It includes：Nand Flash address OS_ADDR, image file size OS_LEN, image file position memory address OS_RAM_ADDR and
Jump address OS_RAM_BOOT_OFF.
Second step writes EEPROM handling function in U-Boot subregion, including：First, opening source code
Include/configs/mini6410.hIIC interface driver macrodefinition：CFG_CMD_I2C；Second, addition eeprom memory
Macrodefinition CFG_I2C_EEPROM_ADDR address 0x50；After above-mentioned modification, that is, EEPROM handling function can be used
eeprom_read(dev_addr,off,os_flag,cnt)、eeprom_write(dev_addr,off,os_flag,cnt)。
Each operating system flag bit is defined, indicates one byte of bit occupancy, wherein 0x00 corresponds to handover management system, and 0x01 is corresponding
Windows CE, 0x02 correspond to Linux QT system, 0x03 corresponding A ndroid system, and flag bit deposits in eeprom memory
In first byte.
Third step：Each operating system load run function is added in U-Boot, each run function that loads is by calling U-
Image file is loaded onto OS_RAM_ADDR memory fortune according to the address Nand Flash defined in the first step by Boot loading command
In row address, and jump to memory address OS_RAM_ADDR start-up operation system kernel.
It is void boot_wince (int exe_flag) that wherein WindowsCE, which loads run function, and exe_flag is to open
Dynamic flag bit decides whether execution starting operation, and operating system load and starting are by executing char set_wince_
The realization of bootcmd [] character string definition command, " nand read.i " MK_STR (WINCE_RAM_ADDR) " " MK_STR
(WINCE_ADDR)""MK_STR(WINCE_LEN)"；" passing through " bootm " MK_STR (WINCE_RAM_BOOT_OFF) "；" life
U-Boot is enabled to jump to Windows CE kernel entrance start-up operation system.
Android run function is void boot_android (int exe_flag), needs to lead to before Android starting
It crosses char set_android_bootargs [] to set, including specified VFS file system type, console
The parameters such as interface and LCD type after the completion of configuration, define Android using char set_android_bootcmd [] and start
Movement, Linux run function void boot_linux (int exe_flag), handover management system run function viod
Boot_manageos (int exe_flag) is consistent substantially with Android run function.
4th step starts menu in QT environment setting system, is illustrated in figure 4 the interface schematic diagram of system starting menu,
System starting menu for user provide Windows CE, Linux QT and tri- example operation Systematic selections of Android by
Button, user can directly select touching LCD, and after user selects example operation system, EEPROM flag bit is rewritten as corresponding to
Operating system, equipment are restarted, and U-Boot is booted up example operation system.
5th step selects an operating system to start in os starting menu, and U-Boot is executed comprising starting
The load run function MyBootOS () of logic, wherein MyBootOS () function by eeprom_read (dev_addr,
Off, os_flag, cnt) function acquisition flag bit, calls switch sentence, is mapped and closed according to the operating system of second step setting
System executes respective operations system run function, when flag bit 0x00,0x01,0x02,0x03, executes boot_ respectively
Manageos (1), boot_wince (1), boot_linux (1) and boot_android (1) function.Before executing function, adjust
With eeprom_write (dev_addr, off, os_flag, cnt) function by mark position be 0x00 so that later equipment restart
Activation system starts menu afterwards.
Claims (2)
1. a kind of intelligence embedded device multiple operating system switching method, it is characterised in that include the following steps：
Step 1：By memory partition, storage address is in turn divided into U-Boot subregion and system partitioning, by each operating system
Image file be successively stored in system partitioning, and between the image file of each operating system be equipped with personal distance, according to each behaviour
The storage address for making the image file of system establishes system image partitions of file table, according to the system image partitions of file table in U-
It is that each operating system establishes address of cache macrodefinition respectively in Boot subregion；The address of cache macrodefinition includes Nand Flash
Address OS_ADDR, image file size OS_LEN, image file position memory address OS_RAM_ADDR and jump address OS_
RAM_BOOT_OFF；
Step 2：In U-Boot subregion add EEPROM flag bit handling function, and define each operating system flag bit and
Handover management system sign position；
Step 3：Add the load run function of each operating system respectively in U-Boot subregion, each run function that loads is used for
Image file at the address Nand Flash is loaded onto memory address OS_RAM_ADDR, and jumps to memory address OS_
RAM_ADDR start-up operation system kernel；
Step 4：Os starting menu is set in QT environment, the os starting menu is for selecting different operations
System；
Step 5：An operating system is selected to start in os starting menu, U-Boot calls EEPROM flag bit behaviour
The flag bit that the operating system is read as function calls the load run function of the corresponding operating system of the flag bit, starting behaviour
Make system.
2. intelligence embedded device multiple operating system switching method according to claim 1, it is characterised in that：In step 5,
Before start-up operation system, EEPROM flag bit handling function is called, flag bit is rewritten as handover management system sign position.
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| CN107632828B (en) * | 2016-07-18 | 2020-04-07 | 迈普通信技术股份有限公司 | Multi-dts file supporting method, compiling device and embedded equipment |
| CN107656757A (en) * | 2016-07-25 | 2018-02-02 | 南京中兴新软件有限责任公司 | operating system switching method and device |
| CN106648685B (en) * | 2016-12-29 | 2020-07-28 | 东软集团股份有限公司 | Intelligent terminal system application processing method and device and intelligent terminal |
| CN109976687A (en) * | 2017-12-28 | 2019-07-05 | 深圳市雍慧电子科技有限公司 | The display system and method for display screen |
| CN108235095B (en) * | 2018-01-17 | 2020-12-08 | 深圳创维数字技术有限公司 | Set top box starting/debugging method based on disk medium, set top box and storage medium |
| IT201800004293A1 (en) * | 2018-04-06 | 2019-10-06 | MANAGEMENT PROCESS OF MULTIPLE OPERATING SYSTEMS IN INTEGRATED CIRCUIT CARDS, CORRESPONDING SYSTEM AND IT PRODUCT | |
| CN110134445A (en) * | 2019-04-02 | 2019-08-16 | 视联动力信息技术股份有限公司 | A kind of switching method and apparatus of operating system |
| CN112860477A (en) * | 2020-12-31 | 2021-05-28 | 京信网络系统股份有限公司 | High-reliability operation method and system for operating system, storage medium and server |
| CN112988253B (en) * | 2021-05-12 | 2021-09-07 | 中勍科技有限公司 | Method for automatically selecting operating system according to slot position based on dual-system board card |
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