KR20050070635A - Embedded computer system for reducing the time for rebooting the unusually logged off system - Google Patents

Abstract

An embedded computer system is provided that can reduce system reboot time by booting in hibernation mode using the system's basic state data in the event of an abnormal shutdown of the system. The embedded computer system of the present invention is configured to perform the hibernation mode booting using hibernation mode booting means for booting the system in the hibernation mode and, if a system shutdown immediately before the booting of the system is abnormally made, using preset default state data. Boot control means for controlling the hibernation mode boot means. In the abnormal termination of the system, it is preferable to copy the basic state data to the hibernation region and boot in the hibernation mode before driving the operating system program.

Description

Embedded computer system for reducing the time for rebooting the unusually logged off system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded system that supports a hibernation mode, and more particularly, to an embedded system capable of shortening the system booting time due to the hibernation mode when the system is abnormally shut down.

In general, when power is supplied to an embedded computer system having a PC structure, the CPU of the system loads a Basic Input Output System (BIOS) program stored in a ROM into the system RAM, and then powers on a BIOS (POST). Test routines are run, and the POST routines consist of program code that tests the system's resources, such as the system's CPU, memory, graphics card, and hard disk. If the operation of each device in the system is normal by performing the POST routine, the OS is started in earnest and the system is searched for the hardware and software configuration information to prepare the system for operation. As such, the inspection of system resources by the BIOS POST routine and the system setup by the operating system program are commonly referred to as 'booting'.

At this time, the operating system program has the software necessary to drive the devices connected to the system, and booting normally when there is no problem by searching the configuration information of each device at the time of booting the system. However, there is a problem that the booting time is lengthened because each time the system is booted, each device of the system and the drivers for driving the devices must be searched for.

In order to solve this problem, Window XP saves the contents of main memory when the system shuts down to a certain part of the hard disk, and then reads the system information of the hard disk into main memory at the next boot and boots as it was before the system shuts down. Hibernation mode has been adopted to reduce boot time. At this time, the data on the state of the system immediately before the shutdown is defined as 'hibernation data', and the area of the hard disk where the hibernation data is stored is defined as a 'hybernation area'.

In other words, operating systems prior to Windows XP, with regard to power management, assume a normal operating state that uses all power (S0 mode), a shutdown state that shuts down all power (S5 mode), and a sleep mode that assumes power is always connected ( Three power management modes such as S3) are adopted, and Windows XP, which supports the Advanced Configuration & Power Interface (ACPI) specification, is introduced, and the state of the system is stored on the hard disk even when the power is cut in addition to the above three power management modes. By adopting hibernation mode (S4 mode), the system boot time can be reduced.

For example, it takes about one to two minutes for the transition time from S5 mode (shut down state) to S0 mode (normal operating state), but in S4 mode (hybernation mode), S0 mode (normal operating state). It only takes about 20 seconds to transition between states. Moreover, it takes a short time of about 10 seconds to transition the state from the S3 mode (sleep mode) to the S0 mode (normal operation state). However, in S3 mode (sleep mode), the system's usage state is stored in main memory (RAM), so the system must be continuously powered to maintain the memory. It will take a long boot time from 1 minute to 2 minutes to reboot the system because the system will lose all the work of the previous system.

On the other hand, when switching from the S0 mode (normal operation state) to the S4 mode (hybernation mode), all the contents of the system (that is, the state of the system) are all stored in the form of a file (for example, hiberfil.sys) in a specific area of the hard disk. Save it and turn off the power. In order to use the system in S0 mode (normal operation state), the operating system remembers the shutdown state and reads the hibernation file into memory.

As described above, the S4 mode has a slightly longer switching time than the S3 mode, but has an advantage of storing the state of the system when the power is cut off, and has a merit that a relatively short time is required compared to the S5 mode. Therefore, it is possible to reduce the time required to reboot the system by defining the shutdown of the system itself in S4 mode. In addition, the hibernation mode is expanding its application base to Window CE, which is a kind of operating system of a small terminal such as a personal digital assistant (PDA).

However, the conventional S4 mode (hybernation mode) goes into an S5 mode (shutdown state) because it can not have time to save the current system state to the hard disk due to an unexpected power failure such as a power failure. When rebooting, it detects abnormal shutdown state of the system and automatically enters recovery mode. Therefore, one minute to switch from S5 mode (shutdown state) to S0 mode (normal operation state). There was a problem that it takes a long boot time of 2 minutes.

Accordingly, an object of the present invention is to reduce the system reboot time after abnormal termination in an embedded computer system in which the hibernation mode is supported.

In order to achieve the above object, the present invention provides an embedded computer system in which the hibernation mode is supported, wherein the hibernation mode booting means for booting the system into the hibernation mode, and the system shutdown immediately before booting the system are abnormally made. In the case of the present invention, an embedded computer system including boot control means for controlling the hibernation mode booting means to perform the hibernation mode booting using preset basic state data is provided.

The boot control means may further include boot information storage means for storing the basic state data and hibernation data to be used for the hibernation mode booting, and a system shutdown state detection for detecting whether a system shutdown immediately before booting of the system is normally performed. Means for copying the basic state data into the hibernation data and controlling the system termination state detection means to detect a normal termination of the system when the system termination state detection means detects an abnormal termination of the system. It is characterized by.

At this time, the boot information storing means further includes system shutdown state information indicating whether the system is normally terminated, and the system shutdown state detecting unit determines whether the system is normally terminated based on the system shutdown state information. Furthermore, when the system termination state detecting means detects abnormal termination of the system, the boot control means modifies the system termination state information to normal termination state information.

On the other hand, the boot control means is characterized in that to copy the basic state data to the hibernation data before the operating system program that initializes the system and controls the overall operation of the system.

In addition, another aspect of the present invention, in order to achieve the above object, in an embedded computer system in which the hibernation mode is supported, the central processing unit, the memory connected to the central processing unit, the booting and overall operation of the system An OS area in which an operating system program for controlling the system is recorded, a basic state data area in which preset system boot information is recorded for booting when the system abnormally terminates, and a system shutdown state information area in which shutdown state information of the system is recorded And a non-volatile storage device including a hibernation area in which hibernation data is recorded for executing the hibernation mode, wherein the central control unit is configured to perform an operation of the system when the system shutdown state information indicates abnormal termination of the system. Second the system in the boot phase And outputting data of the basic state data area to the hibernation area before outputting and executing an operating system program to the memory, wherein the operating system program initializes the system with the hibernation data. Provide a system.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 shows an example of the configuration of an embedded computer system according to a preferred embodiment of the present invention.

The embedded computer system 10 controls the CPU 12, the memory 14 connected to the CPU 12, and the data input / output between the nonvolatile storage device 18 and the CPU 12 and the memory 14. An I / O control device 16 and a nonvolatile storage device 18 in which various application programs are stored, including an operating system (OS) program of the system. The system bus also constitutes a data exchange path between the devices.

On the other hand, the CPU 12 controls the operation of the components of the system as a central processing unit, the memory 14 is input and output to the system RAM (RAM) and operating system (OS), including DRAM, SRAM or RAMBUS memory, etc. It includes a BIOS ROM (ROM) that stores a BIOS for inspecting and running the initial state of the device or peripheral device, and may also include cache memory and CMOS memory.

The I / O control device 16 writes the data recorded in the nonvolatile storage device 18 to the memory 14 by the CPU 12 or stores the data in the memory 14 by the CPU 12 nonvolatilely. It is in charge of input / output control between devices when performing operations such as recording to the device 18. Thus, although not shown in the figure, the I / O control device 16 also interfaces with the CPU 12 and the memory 14 for data input / output of peripheral devices such as network interface cards and graphics cards in addition to the nonvolatile storage device 18. .

In addition, the nonvolatile storage device 18 includes a storage medium such as a hard disk, a floppy disk, a CD-ROM, a DVD, and the like, and a flash memory mainly used in a small portable terminal. The information is lost even when the power is cut off. Storage media, which are not used, are not particularly limited to any one physical storage media in the present invention.

2 shows a configuration example of a nonvolatile storage device 18 according to a preferred embodiment of the present invention. According to FIG. 2, the nonvolatile storage device 18 includes an OS area 181 in which an operating system program is recorded, a hibernation area 183 in which hibernation data for executing a hibernation mode is recorded, and the system 10 is factory-set. The initial state data area 185 in which the initial state when shipped from or the state of the system 10 arbitrarily designated by the user is recorded, and the system end state information area 187 in which information about whether the system is normally shut down is recorded. It consists of.

Hereinafter, the operation of the embedded computer system 10 according to a preferred embodiment of the present invention.

When power is supplied to the system 10, the CPU instructions (e.g., boot programs) stored in the BIOS of the memory 14 are executed, and the contents of the BIOS are stored in the system RAM of the memory 14 so that the CPU 12 operates faster. Is passed to. Subsequently, the POST program included in the BIOS is executed to check whether each device of the system is performing normal operation. If the POST program determines that the system is in the normal operating state, the CPU 12 executes the operating system program of the OS area. It is mounted in the system RAM of the memory 14 to execute an operating system program.

The operating system program then boots the system with the hibernation data recorded in the hibernation area 183 of the non-volatile storage device 187, for which the system RAM of the memory 14 at the end of the system 10 is booted. The information stored in the hibernation area is recorded as hibernation data. That is, the system 10 has the S4 mode (hybernation mode) set to the default boot mode.

Meanwhile, the operating system program checks that the system 10 is normally terminated by referring to the shutdown state information area 187 before booting. In addition, when the system 10 is abnormally shut down due to a sudden power failure such as a power failure, the basic state data area 185 before executing an operating system program in the process of rebooting the system 10, for example, when the BIOS is executed. Information indicating that the system 10 was normally terminated by copying the basic state data recorded in the above into the hibernation area and simultaneously recording the information indicating that the system 10 was abnormally terminated. Record as modified.

At this time, the basic state data is boot data including a list of peripheral devices to be searched for and ready for driving and a state in which the peripheral devices should be set when the system 10 is booted. It can be a default value set in or a user value arbitrarily determined by the user. Therefore, the operating system program recognizes the basic state data as the hibernation data and boots the system 10 when booting after the system 10 is abnormally shut down, thereby booting the system 10 from the beginning in the recovery mode even after the abnormal system shutdown. You don't need to do that, so you can shorten your boot time.

3 is a block diagram of an embedded computer system 30 in which the embedded computer system 10 of the preferred embodiment of the present invention is composed of functional components. Accordingly, each component of the embedded computer system 30 is placed on the CPU 12, the memory 14, the I / O controller 16, the nonvolatile storage device 18, and the system bus of the embedded computer system 10. Is implemented.

The embedded computer system 30 includes a system information storage unit 32, a system termination state detection unit 34, a control unit 36, and a system booting unit 38. The system information storage unit 32 stores information necessary for the operation of the system, such as system termination state information, basic state information, hibernation data, and an operating system program.

The system termination state detection unit 34 detects whether the system 30 is terminated by a normal termination operation or abnormally terminated by a sudden power cut such as a power failure, and the control unit 36 determines that the system termination state detection unit 34 Based on the detection, the system termination state information of the system information storage unit 32 is set. In addition, the controller 36 transmits the system termination state information of the system information storage unit 32 to the system booting unit 38 when there is a power input from the outside.

The system booting unit 38 includes a POST executing unit and an operating system program executing unit, and the POST executing unit is configured to store the system information storage unit if the shutdown state information indicates an abnormal termination state according to the shutdown state information received from the control unit 36. Modify the hibernation data of (32) to the basic state information and at the same time modify the shutdown state information to the normal end state. The operating system program execution unit boots the system 30 with the hibernation data according to the modified system shutdown state information. Therefore, even when rebooting after abnormal termination, a time required for re-searching the setting contents of the devices related to the system 30 can be omitted, thereby reducing the booting time.

Meanwhile, the system shutdown state detector 34 may detect an abnormal shutdown state in the process of retrieving the setting state of the system components by the operating system. However, the system shutdown state detection unit 34 may refer to the system shutdown state information recorded in the system information storage unit. It is desirable to detect the shutdown state of the system prior to startup, for example at the BIOS stage, and modify the hibernation data to default state data before the operating system is started.

4 shows a booting method of an embedded computer system according to a preferred embodiment of the present invention. According to FIG. 4, when a user inputs power for system booting (S401), the system starts boot code (S403) to execute the BIOS, and the BIOS performs setting and initialization of the CPU and peripheral devices (S405 and S407). ). At this time, in step S409, the BIOS detects whether the system was normally shut down before the current booting. If it is detected that the system is normally shut down, the BIOS reads the operating system program into the memory in step S411. In the hibernation mode booting process, if abnormal termination is detected, the basic state data is copied to the hibernation data and the termination state information is corrected in step S413 before the operating system program is read into the memory. In step S411), the operating system program is driven to terminate the boot process by performing a normal hibernation mode boot.

According to the present invention, even when the embedded computer system is abnormally terminated, the hibernation booting mode is performed using the preset basic state data, thereby reducing the time required for rebooting after the abnormal termination of the system.

In addition, the present invention may naturally be applied to an embedded computer system in which a user may install and modify a program from time to time, such as a PC, but rather to an embedded computer system mainly using only initially set functions such as a personal digital assistant (PDA). More effective.

1 is a block diagram of an embedded computer system according to an exemplary embodiment of the present invention.

FIG. 2 is a block diagram illustrating an internal configuration of the nonvolatile storage device of FIG. 1.

3 is a block diagram of an embedded computer system in which the configuration of FIG. 1 is expressed as a functional block.

4 is a flowchart of a booting method at abnormal termination of a system according to an embodiment of the present invention.

Claims (6)

In an embedded computer system that supports hibernation mode, Hibernation mode booting means for booting the system into the hibernation mode; And a boot control means for controlling the hibernation mode booting means to perform the hibernation mode booting using a preset basic state data when the system shutdown is abnormally performed immediately before booting of the system. 2. The system of claim 1, wherein the boot control means comprises: boot information storage means for storing the basic state data and hibernation data to be used for the hibernation mode boot, and detecting whether a system shutdown immediately before booting of the system is normally performed. And a system termination state detecting means, wherein when the system termination state detecting means detects abnormal termination of the system, the basic state data is copied into the hibernation data, and the system termination state detecting means detects normal termination of the system. And control to detect. The system as claimed in claim 2, wherein the boot information storage unit further includes system termination state information indicating whether the system is normally terminated, and the system termination state detecting unit determines whether the system is normally terminated based on the system termination state information. Embedded computer system, characterized in that judging. 4. The embedded computer system according to claim 3, wherein the boot control means modifies the system termination state information to normal termination state information when the system termination state detecting means detects abnormal termination of the system. The system of claim 2, wherein the boot control means copies the basic state data to the hibernation data prior to running an operating system program that initializes the system and controls the overall operation of the system. Embedded computer system, characterized in that. In an embedded computer system that supports hibernation mode, With central processing unit, A memory connected to the central processing unit; An OS area in which an operating system program controlling booting and overall operation of the system is recorded, a basic state data area in which preset system boot information is recorded for booting when the system abnormally terminates, and shutdown state information of the system A nonvolatile storage device including a recorded shutdown state information area and a hibernation area in which hibernation data for executing the hibernation mode is recorded; When the system shutdown state information indicates an abnormal termination of the system, the central control apparatus outputs an operating system program for initializing the system to the memory and executes the basic state data area before executing the system. And copy the data of the data into the hibernation area, and the operating system program initializes the system with the hibernation data.