JPH10149236A - Method for recovering hibernation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain wake-up processing based on reproducing information stored in an external storage device only by an information processor capable of storing the reproducing information in the external storage device at the time of executing hibernation processing. SOLUTION: At the time of executing hibrenation processing, a CPU 1 stores reproducing information required for reproducing the execution state in a detachable external storage device 8 and stores a hibernation password constituted of the execution time, the check sum of the reproducing information, etc., in a battery backup memory 3 and the device 8. Then the CPU 1 instructs a power supply unit 10 to stop power supply. When a power supply switch 11 is turned on, the CPU 11 compares hibernation passwords stored in the device 8 and the memory 3, and only when both the passwords coincide with each other, Wake-up processing based on the reproducing information stored in the device 8 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a hibernation recovery method in a portable information processing apparatus having a detachable external storage device.

[0002]

2. Description of the Related Art In recent years, small and lightweight notebook personal computers have been widely used.
When such a notebook personal computer is used outdoors, power is usually supplied by a battery. However, the battery mounted on the notebook personal computer is limited to a small battery, and the time that can be used by one charge is short. For this reason, various measures have been conventionally taken to reduce power consumption.

[0003] For example, the suspend / resume function
This is one of such ideas. According to this function, the computer enters the suspend mode when a predetermined event occurs, for example, when the activity of the I / O device is not detected for a certain period of time. Upon entering the suspend mode, all running jobs are terminated, and information necessary for resuming later is stored in the main memory. After that, the main
Power supply to other than memory and video memory is stopped. As a result, power is not supplied to the CPU and the like.
Power consumption can be reduced. But the main
Since power is supplied to the memory and the video memory, when the suspend mode continues for a long time, the power of the battery is consumed, and as a result, the contents of the main memory and the video memory are lost.

To solve such a problem, a notebook personal computer having a hibernation function has been proposed. Notebook computers equipped with a hibernation function can store reproduction information necessary for resuming a job later when an event such as the suspension mode continues for a certain period of time is stored in an external storage device such as a hard disk drive. After storing the entire device,
Turn off. By providing this function, the power of the entire system including the main memory and the video memory is turned off, so that the above-mentioned problem is solved.

In recent years, a removable hard disk drive has been mounted on a notebook personal computer. As a technique for performing hibernation in such a notebook personal computer, for example, there is a technique described in JP-A-7-44437. In this technique, when executing the hibernation process, in addition to the reproduction information, the configuration information of the notebook personal computer that has executed the hibernation process is stored in a hard disk drive. The configuration information stored in the device is compared with the configuration information of the notebook computer. If the two match, the reproduction information stored in the hard disk device is used as the main information.
The data is restored to the memory and the video memory, and if they do not match, the restoration of the reproduction information is refused.

[0006]

SUMMARY OF THE INVENTION The above-mentioned JP-A-7-4
The technology described in Japanese Patent No. 4437 discloses a technique in which when the resume processing is performed, if the configuration information stored in the hard disk device matches the configuration information of the notebook computer, the stored information is stored in the hard disk device. The restored reproduction information is restored to the main memory and the video memory. Therefore, if the configuration information is the same, the hardware information is stored in a notebook personal computer other than the notebook personal computer that executed the hibernation process. There is a problem that the reproduction information is restored even when the disk device is executed. That is,
Even if a person who illegally acquired the hard disk device in which the reproduction information was stored by the hibernation process,
If a notebook personal computer with the same configuration information as the notebook personal computer on which the hibernation process was executed is used,
Since wake-up can be performed using the reproduction information stored in the disk device, there is a problem in security.

Therefore, an object of the present invention is to make it possible to wake up using reproduction information stored in an external storage device only in an information processing device in which the reproduction information is stored in the external storage device. It is to provide a hibernation recovery method.

[0008]

According to the present invention, a CPU, a volatile main memory, a volatile video memory, a backup memory, a display device, and a detachable external device are provided. A storage device and a battery,
An information processing apparatus for executing a hibernation process of stopping power supply from the battery after storing reproduction information necessary for reproducing a state at the time of occurrence of a predetermined event in the external storage device; In executing the hibernation process, a hibernation password is created and stored in the backup memory and the external storage device, and when the resume process is executed,
It is checked whether the hibernation password stored in the backup memory matches the hibernation password stored in the external storage device attached to the information processing apparatus. Wake-up is performed using the reproduction information stored in the device, and if they do not match, wake-up is not performed.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of an information processing apparatus such as a portable notebook personal computer for implementing the hibernation recovery method of the present invention. The portable information processing device shown in FIG.
A CPU 1; a main memory 2; a battery backup memory 3; an input device 4 such as a keyboard;
A memory 5, a display control circuit 6, and a display device 7 such as a CRT
An external storage device 8 such as a removable hard disk device, a main battery 9 for supplying power when the information processing device is used outdoors, and the like; a power supply unit 10;
A power switch 11 and a bus 12 are provided.

The main memory 2 stores a program executed by the CPU 1 and the like. When the hibernation process is executed, the CPU 3
1 stores the hibernation password. In the battery backup memory 3, areas for a suspend flag and a hibernation flag are set. The suspend flag is turned on when the suspend process is executed, and the hibernation flag is turned on when the hibernate process is executed.

Information to be displayed on the display device 7 is written into the video memory 5 by the CPU 1. And
The information written in the video memory 5 is transmitted to the display control circuit 6
And displayed on the display device 7.

The power supply unit 10 restarts power supply to the CPU 1 when a predetermined time elapses after a function to supply power to each unit in accordance with an instruction from the CPU 1 or an instruction from the CPU 1 to set the power supply mode to the suspend mode. And a function for notifying the user of such a situation.

FIG. 2 is a flowchart showing an example of processing when executing the suspend processing, FIG. 3 is a flowchart showing an example of processing when executing the hibernation processing, and FIG. 4 is a flowchart showing an example of processing when executing the resume processing. The operation of this embodiment will be described with reference to the drawings.

When an event such as activity of the input device 4 is not detected for a certain period of time in a state where power is supplied from the main battery 9 to each portion of the device, the CPU 1 executes a suspend process shown in the flowchart of FIG. Is started, and the job currently being executed is ended (S1). Next, a suspend information file including reproduction information (for example, register information) necessary for restarting the ended job is created, and stored in the main memory 2 (S2, S3).

Thereafter, the CPU 1 turns on the suspend flag by writing information indicating that the suspend flag has been turned on into the area for the suspend flag in the battery backup memory 3 (S4).

Next, the CPU 1 instructs the power supply unit 10 to set the power supply mode to the suspend mode (S5). Upon receiving this instruction, the power supply unit 10 stops supplying power to components other than the main memory 2 and the video memory 5.

When this state (suspend mode) continues for a certain period of time, the power supply unit 10 starts power supply to the CPU 1 and then notifies the CPU 1 that the suspend mode has continued for a certain period of time.

Upon receiving this notification, the CPU 1 starts the hibernation process shown in the flow chart of FIG. 3, and reproduces information (the main memory 2 of the main memory 2) necessary to restart the job ended in S1 of FIG. Contents, video memory 5
(S11), and then a hibernation password is created by combining the checksum of the hibernation information file and the current time (S12). In the present embodiment, the combination of the checksum of the hibernation information file and the current time is used as the hibernation password. However, only the checksum or only the current time may be used as the password.

Thereafter, the CPU 1 turns on the hibernation flag by writing information indicating that the hibernation flag has been turned on into the area for the hibernation flag in the battery backup memory 3, and at S12
Is stored in the battery backup memory 3 (S13).

Next, the CPU 1 stores the hibernation information file created in S11 and the hibernation password created in S12 in the external storage device 8 (S14).

When the above processing is completed, the CPU 1 instructs the power supply unit 10 to set the power supply mode to the hibernation mode (S15). As a result, the power supply unit 10 powers off the entire apparatus including the main memory 2 and the video memory 5.

Next, the operation when the power switch 11 is turned on will be described. When the power switch 11 is turned on, the power supply unit 10 starts supplying power to the entire apparatus.

Thus, the CPU 1 starts the resuming process shown in FIG. 4 after the completion of the initial diagnosis, and first checks with reference to the battery backup memory 3 whether or not the suspend flag is turned on (S21).

When the suspend flag is turned off (NO in S21), neither the suspend process nor the hibernation process is performed, so that
The CPU 1 performs boot processing from the initial state (S2).
2).

On the other hand, if the suspend flag is on (S21: YES), it is checked whether the hibernation flag is on (S23).

When the hibernation flag is off (S23: NO), the suspend process is executed but the hibernation process is not executed, so that the CPU 1 stores it in the main memory 2. The state at the time of starting the execution of the suspend process is reproduced using the reproduced information (S24). In step S24, a process for turning off the suspend flag is also performed by storing information indicating that the suspend flag has been turned off in the suspend flag area in the battery backup memory 3.

On the other hand, if the hibernation flag is on (S23: YES), the external storage device 8
Read the hibernation password from (S2
5) Compare with the hibernation password stored in the battery backup memory 3 (S26).

If they match, the wake-up process using the reproduction information stored in the external storage device 8 is performed.
Up is executed (S27). Incidentally, in S27,
The process of turning off the suspend flag and the hibernation flag is also performed by writing information indicating that the suspend flag and the hibernation flag are turned off in each of the suspend flag area and the hibernation flag area in the battery backup memory 3.

On the other hand, if the hibernation passwords do not match, error processing such as displaying a message indicating that wake-up cannot be performed on the display device 7 is performed (S28), and then forced boot processing from the initial state is performed. (S29). That is, when an external storage device storing the reproduction information is mounted by another information processing device, the wake-up cannot be performed.

[0031]

As described above, according to the present invention, the same hibernation password is stored in the external storage device and the backup memory in the information processing device when the hibernation process is executed, and the external storage device is executed when the resume process is executed. Only when the password stored in the device and the password stored in the backup memory are the same, the wake-up operation is performed, so the reproduction information stored in the external storage device is used. The wake-up can be made possible only by the information processing device that stores the reproduction information in the external storage device. As a result, sufficient security can be ensured.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a processing apparatus that implements a hibernation recovery method of the present invention.

FIG. 2 is a flowchart illustrating a processing example when executing a suspend process.

FIG. 3 is a flowchart illustrating a processing example when executing a hibernation process.

FIG. 4 is a flowchart illustrating a processing example when executing a resume process.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 CPU 2 main memory 3 battery backup memory 4 input device 5 video memory 6 display control circuit 7 display device 8 external storage device 9 main battery 10 power supply unit 11 power switch 12 bus

Claims (3)

[Claims] 1. A CPU, a volatile main memory,
It includes a volatile video memory, a backup memory, a display device, a detachable external storage device, and a battery. When a predetermined event occurs, reproduction information necessary to reproduce the state at that time. Is stored in the external storage device, in the information processing apparatus that executes a hibernation process of stopping the power supply from the battery, when the hibernation process is performed, a hibernation password is created and the backup memory and Whether the hibernation password stored in the backup memory and the hibernation password stored in the external storage device attached to the information processing device match when the resuming process is performed and stored in the external storage device. Investigate or not, if they match, the external storage device Run the wake-up using the reproduction information stored, in the case of disagreement, hibernation recovery method characterized in that it does not perform a wake-up. 2. The hibernation password,
2. The hibernation recovery method according to claim 1, further comprising a time when the predetermined event occurs or a checksum of the reproduction information. 3. The hibernation recovery method according to claim 2, wherein the reproduction information includes contents of the main memory and contents of the video memory.