KR20150110100A - Method for fast booting and computting apparatus thereof - Google Patents

Abstract

The present invention relates to a fast booting method and a computing apparatus thereof. A fast booting method according to an embodiment of the present invention, in a computing apparatus which includes a first non-volatile memory, a second non-volatile memory, and a DRAM, includes a step of receiving a booting command, a step of restoring kernel data stored in the second non-volatile memory to store the same in a kernel region of the first non-volatile memory when fast booting can be carried out, a step of deleting update data stored in the DRAM, and a step of restoring CPU data and device data stored in the second non-volatile memory and storing in a CPU and a device respectively.

Description

[0001] METHOD FOR FAST BOOTING AND COMPUTING APPARATUS THEREOF [0002]

The present invention relates to a fast boot method and a computing device therefor.

Recently, researches on memory have been actively conducted for fast processing of computers and the like. Particularly, although volatile memories have been used as main memories in the past, researches on nonvolatile memories have been actively conducted to overcome the limitations of volatile memories.

A non-volatile memory is a memory having characteristics that data is not lost in spite of interruption of power supply. Such a nonvolatile memory is a memory cell which is nonvolatile by itself, and can access addresses in bytes at a high speed.

The current system has a two-level storage system such as main memory and storage (storage). When the system boots, it loads the kernel and other information from the storage device into the main memory, The booting is completed. Therefore, boot time is required to be at least 10 seconds, so boot-time-sensitive systems are restricted from booting as much as possible.

Also, there is a server system that is not to be rebooted because the system that is sensitive to boot time should always provide service, and there is a smart phone that should always be in standby mode in order to receive other information such as text, phone, All systems are sensitive to booting.

SUMMARY OF THE INVENTION The present invention is directed to a fast boot method for fast booting of a system using a nonvolatile memory and a computing device therefor.

A fast boot method according to the first embodiment of the present invention is a computing device including a first nonvolatile memory, a second nonvolatile memory, and a DRAM, the method comprising: receiving a boot command; 2 restoring kernel data stored in a nonvolatile memory into a kernel area of the first nonvolatile memory, deleting update data stored in the DRAM, and transferring CPU data and device data stored in the second nonvolatile memory to a CPU And a device.

A fast boot method according to a second embodiment of the present invention is a computing device including a first nonvolatile memory, a second nonvolatile memory, and a DRAM, the method comprising the steps of: receiving a boot command; Determining whether read-only of the first nonvolatile memory has been performed, if the cold boot has been performed, checking whether the CPU and the device data are stored in the second nonvolatile memory, Data and the device data are stored in the second nonvolatile memory and when the read-only operation of the first nonvolatile memory is performed, the kernel data stored in the second nonvolatile memory is stored in the kernel area of the first nonvolatile memory , Deleting the update data stored in the DRAM, restoring the update data stored in the second nonvolatile memory And restoring the data and the device data to the CPU and the device, respectively.

A fast boot method according to a third embodiment of the present invention is a computing device including a first non-volatile memory, a second non-volatile memory, and a DRAM, comprising: receiving a write command to the first non-volatile memory; Storing kernel source data of the kernel area in the second nonvolatile memory if the fault occurrence area is the kernel area; releasing read-only access to the kernel original data area of the first nonvolatile memory; Writing to the kernel original data area, and writing to the DRAM if the fault occurrence area is not the kernel area.

The computing device for fast booting according to the first embodiment of the present invention receives a boot command from a first non-volatile memory, a second non-volatile memory, a DRAM, Volatile memory into the kernel area of the first nonvolatile memory, deletes the update data stored in the DRAM, and restores the CPU data and the device data stored in the second nonvolatile memory to the CPU and the device, respectively Lt; / RTI >

The computing device for fast booting according to the second embodiment of the present invention receives a boot command from a first non-volatile memory, a second non-volatile memory, a DRAM, and determines whether a cold boot has been performed Volatile memory, and when the cold boot has been performed, the CPU data and the device data are stored in the second nonvolatile memory, and it is confirmed whether the read-only operation of the first nonvolatile memory has been performed, Volatile memory and restoring the kernel data stored in the second nonvolatile memory into the kernel area of the first nonvolatile memory if the read-only operation of the first nonvolatile memory has been performed, And the CPU data and the device data stored in the second non- And a control module for controlling the restoration in a vice.

The computing device for fast booting according to the third embodiment of the present invention receives a write command to a first non-volatile memory, a second non-volatile memory, a DRAM, and the first non-volatile memory and generates a fault, Volatile memory of the first nonvolatile memory, the kernel original data of the kernel area is stored in the second nonvolatile memory if the occurrence area is the kernel area, the read-only operation of the kernel original data area of the first nonvolatile memory is released, And a control module that controls writing to the DRAM if the fault occurrence area is not the kernel area.

The fast boot method according to the embodiment of the present invention and the computing apparatus therefor have the following effects.

First, since the present invention can be applied to an embedded system such as a smart phone, a PC, and a server market, energy can be saved because a user can turn off the system without putting the system in the IDLE state when not using the system.

Second, since the booting time is long, the booting operation can be booted frequently due to the high-speed boot, thereby improving the stability of the system.

1 illustrates a fast boot computing device in accordance with an embodiment of the present invention.
2 is a block diagram illustrating a cold boot process of a computing device according to an embodiment of the present invention.
3 is a flowchart illustrating a cold boot process of a computing device according to an embodiment of the present invention.
4 is a block diagram illustrating a read-only process of a computing device according to an embodiment of the present invention.
FIG. 5 is a flowchart illustrating a read-only process of a computing device according to an exemplary embodiment of the present invention.
6 is a block diagram illustrating a method of maintaining a booting completion state in a kernel area of a computing device according to an embodiment of the present invention.
7 is a block diagram illustrating a method of maintaining a booting completion state in a user area of a computing device according to an embodiment of the present invention.
8 is a flowchart illustrating a method of maintaining a booting completion state of a computing device according to an embodiment of the present invention.
9 is a block diagram illustrating a fast boot method of a computing device according to an embodiment of the present invention.
10 is a flowchart illustrating a fast boot method of a computing device according to the first embodiment of the present invention.
11 is a flowchart illustrating a fast boot method of a computing device according to a second embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims.

In addition, the terms used in the present invention are intended to illustrate embodiments and are not intended to limit the present invention. In the present invention, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises "and / or" comprising "used in the specification do not exclude the presence or addition of components other than the components mentioned. Unless defined otherwise, all terms (including technical and scientific terms) used herein are to be construed in a manner that is commonly understood by one of ordinary skill in the art to which this invention belongs.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a fast boot computing device in accordance with an embodiment of the present invention.

The fast boot computing device in the present invention includes but is not limited to a computer, a laptop computer, a handheld computer, a tablet computer, a mobile phone, a media player, a PDA, Lt; / RTI > It should be appreciated that the fast boot computing device is an example of an electronic device and may have more or fewer components or configurations of different components than the fast boot computing device shown in FIG. The various components shown in FIG. 1 may be implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and / or application specific integrated circuits.

Referring to FIG. 1, the fast boot computing apparatus includes a first nonvolatile memory 10, a second nonvolatile memory 20 and a DRAM 30, which are nonvolatile memories, and a storage device 60.

The first nonvolatile memory 10, the second nonvolatile memory 20 and the DRAM 30 store data and result data during a computing operation for at least one process processed by the CPU 40 which is a central processing unit . In addition, the first nonvolatile memory 10, the second nonvolatile memory 20, and the DRAM 30 are configured so that the central processing unit reads the necessary file from the storage device 60 for computing operation for the process, And the data and the result data during the computing operation can be stored until the data is transferred to the storage device 60 due to the termination of the computing operation for the process or the like.

For example, the first nonvolatile memory 10 and the second nonvolatile memory 20, which are nonvolatile memories, may be nonvolatile random access memories (NVRAMs) (Storage Class Memory, SCM). As the storage class memory, a phase change RAM (PCRAM), a magnetoresistive RAM (MRAM), a ferroelectric RAM (FeRAM), a spin transfer torque MRAM (STT-MRAM) And the volatile memory is a DRAM 30 (Dynamic Random Access Memory). In the present invention, the DRAM 30 is described as a volatile memory, but it is also applicable to other embodiments.

In the present embodiment, the nonvolatile memory is divided into the first nonvolatile memory 10 and the second nonvolatile memory 20, but in another embodiment, the nonvolatile memory is divided into two, The present invention is applicable even when there are three or more volatile memories.

The first nonvolatile memory 10 serves as a main memory and includes a kernel area 11 and a user area 15. [

The second nonvolatile memory 20 includes kernel original data areas 21 and 22 for storing kernel original data in a boot completion state of the computing device.

The DRAM 30 includes a user update data area 35 for storing user update data which is updated data in the user area 15 after the booting of the computing device is completed.

That is, since the computing device (or the control module 70) has the 1: 1 mapping between the virtual memory of the kernel area 11 and the actual physical memory, the real data of the kernel always remains in the kernel area 11. [ Therefore, the computing device stores the user update data, which is an update to the user area 15 after booting, in the user update data area 35 of the DRAM 30, and the kernel updater data, which is update data of the kernel, And the kernel original data at the time of boot completion which will disappear due to the update of the kernel is stored in the kernel original data area.

The storage device 60 may be a portion storing any data, software, etc., and may include a high-speed random access memory and may also include one or more magnetic disk storage devices 60, non-volatile memory such as flash memory devices, Non-volatile semiconductor memory devices.

In some embodiments, the storage device 60 may be coupled to a storage device 60, e.g., a communication circuit or external port, located off of one or more central processing units, such as the Internet, an intranet, a LAN (Local Area Network) ), A storage area network (SAN), etc., or any suitable combination thereof.

In addition, the storage device 60 may include a control module 70, which controls fast boot, cold boot, etc. of the computing device. According to an embodiment, the control module 70 acts as an operating system of the computing device.

The control module 70 receives the boot instruction and restores the kernel data stored in the second nonvolatile memory 20 to the kernel area 11 of the first nonvolatile memory 10 And deletes the update data stored in the DRAM 30 and restores the CPU data and the device data stored in the second nonvolatile memory 20 to the CPU 40 and the device 50, respectively.

The control module 70 receives the boot command and checks if the cold boot is performed if the boot method is the fast boot. If the cold boot is performed, the CPU module 70 and the device data are stored in the second nonvolatile memory 20 Volatile memory 10, and the CPU data and the device data are stored in the second non-volatile memory 20, and the reading of the first non-volatile memory 10 The kernel data stored in the second nonvolatile memory 20 is restored to the kernel area 11 of the first nonvolatile memory 10 and the update data stored in the DRAM 30 is deleted, And restores CPU data and device data stored in the nonvolatile memory 20 to the CPU 40 and the device 50, respectively.

The control module 70 receives the write command from the first nonvolatile memory 10 and generates a fault if the fault occurrence area is the kernel area 11, 2 nonvolatile memory 20, releases read-only access to the kernel original data area of the first nonvolatile memory 10, writes to the kernel original data area, and sets the fault occurrence area to the kernel area ( 11), it controls to perform writing to the DRAM 30.

FIG. 2 is a block diagram illustrating a cold boot process of a computing device according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a cold boot process of a computing device according to an embodiment of the present invention.

Referring to FIGS. 2 and 3, the computing device receives a system boot command (S310).

The computing device determines whether the main memory is the first nonvolatile memory 10 (S320).

The computing device fetches the kernel image file 610 and the RAM disk file 630 from the storage device 60 to the first nonvolatile memory 10 if the main memory is the first nonvolatile memory 10 at step S330. Here, the ramdisk file 630 is an example of a file in which a system such as a computing device creates an image form of a root file system required for booting. In addition to the ramdisk file 630, Other files that perform the same function as the file system are also possible.

In this case, when the physical start address of the main memory of the computing device is designated as the first nonvolatile memory 10, the computing device reads the kernel image file 610 and the RAM disk file 630 from the storage device 60, Non-volatile memory 10. If the physical start address of the main memory of the computing device is designated as the DRAM 30, the computing device fetches the kernel image file 610 and the RAM disk file 630 from the storage device 60 to the DRAM 30 .

If the main memory is not the first nonvolatile memory 10, the computing device performs step S320.

The computing device decompresses the kernel image file 610 and the ramdisk file 630, and completes the initialization process of the kernel (S340).

The purpose of the cold boot process of FIG. 2 is to put the data to be loaded into the main memory for booting the system, which is a computing device, into the first nonvolatile memory 10, Nonvolatile property.

FIG. 4 is a block diagram illustrating a read-only process of a computing device according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a read-only process of a computing device according to an embodiment of the present invention.

In the present invention, the read-only mode is a mode of modifying the content of the conversion table used by the MMU (MMU), and the read-only operation of the first nonvolatile memory 10 , It means that the whole area of the first nonvolatile memory 10 is made read-only.

Referring to FIGS. 4 and 5, the computing device receives a read-only command of the first non-volatile memory 10 (S510).

The computing device stores the CPU data of the CPU 40 and the device data from at least one or more devices 50 in the CPU data area 410 and the device data area 510 of the second nonvolatile memory 20 respectively ). At this time, CPU data and device data are volatile data that can be blown off when the computing device is powered off.

The computing device changes the first non-volatile memory 10 to read-only mode (S530). Here, the entire first nonvolatile memory 10 is made read-only.

At this time, the present invention modifies the conversion table of the MMU in order to make the first nonvolatile memory 10 read-only. The MMU operates in hardware, and the conversion table exists in main memory.

FIG. 6 is a block diagram illustrating a method of maintaining a booting completion state in a kernel area 11 of a computing device according to an embodiment of the present invention. FIG. FIG. 8 is a flowchart illustrating a method for maintaining a booting completion state of a computing device according to an exemplary embodiment of the present invention. Referring to FIG.

Here, the booting completion state maintenance method of the computing device can be expressed by the boot image maintenance method, but the concepts are the same.

Referring to FIGS. 6 to 8, the computing device receives a write command to the first nonvolatile memory 10 (S810).

After receiving the write command, the computing device generates a fault (S820). This is because the first nonvolatile memory 10 is read-only.

The computing device determines whether the fault occurrence area is the kernel area 11 (S830).

The computing device stores the kernel original data in the kernel original data area 110 of the kernel area 11 in the specific area 210 of the second nonvolatile memory 20 if the fault occurrence area is the kernel area 11 .

The computing device releases read-only access to the kernel original data area 110 of the first non-volatile memory 10. [ That is, the kernel original data area 110 is released from the read-only mode and data writing is possible.

The computing device writes to the kernel original data area 110 (S860).

If the fault occurrence area is not the kernel area 11, the computing device writes the write area 310 of the DRAM 30 (S870).

The computing device modifies the page table (S880). Here, the page table exists in the virtual memory.

FIG. 9 is a block diagram illustrating a fast boot method of a computing device according to an embodiment of the present invention. FIG. 10 is a flowchart illustrating a fast boot method of a computing device according to the first embodiment of the present invention, Is a flowchart illustrating a fast boot method of a computing device according to a second embodiment of the present invention.

9 and 10, a fast booting method of a computing apparatus according to the first embodiment of the present invention will be described.

The computing device receives a boot command (S1010).

The computing device determines whether the booting method is a fast boot (S1020).

If the boot method is a fast boot, the computing device checks whether a cold boot has been performed (S1030).

If the booting method is not the fast booting, the computing device checks whether the booting method is the cold booting (S1040).

When the cold boot has been performed, the computing device stores the CPU data and the device data in the second nonvolatile memory 20 and confirms whether read-only operation of the first nonvolatile memory 10 as the main memory is performed (S 1060) .

If the cold boot has not been performed, the computing device performs a cold boot (S1050).

If the booting method is a cold boot, the computing device performs a cold boot (S1050). If the booting method is not a cold boot, the computing device performs step S1020.

If the CPU data and the device data are not stored in the second nonvolatile memory 20 and the read-only operation of the first nonvolatile memory 10 which is the main memory has not been performed, Volatile memory 20 and performs read-only operation of the first non-volatile memory 10 which is a main memory (S1070).

Volatile memory 20. When the CPU and data are stored in the second nonvolatile memory 20 and the read-only operation of the first nonvolatile memory 10, which is the main memory, has been performed, In the kernel area 11 of the first nonvolatile memory 10, the kernel data stored in the first nonvolatile memory 210 (210, 220, 230, 240) (S1080).

The computing device deletes the update data stored in the DRAM 30 (S1090).

The computing device restores the CPU data stored in the CPU data area 410 of the second nonvolatile memory 20 and the device data stored in the device data area 510 to the CPU 40 and the device 50 respectively (S1100) .

9 and 11, a fast booting method of a computing device according to a second embodiment of the present invention will be described.

The computing device receives a boot command (S1110).

The computing device checks whether a fast boot can be performed (S1120).

Volatile memory 20 can be stored in the kernel area 11 of the first nonvolatile memory 10 if the fast boot can be performed by the computing device, the kernel data stored in the specific areas 210, 220, 230 and 240 of the second nonvolatile memory 20, (S1140).

If the fast booting is not feasible, the computing device performs a cold boot (S1130).

The computing device deletes the update data stored in the DRAM 30 (S1150).

The computing device restores the CPU data stored in the CPU data area 410 of the second nonvolatile memory 20 and the device data stored in the device data area 510 to the CPU 40 and the device 50 respectively (S1160) .

The method according to embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, and the like, alone or in combination. The program (program instructions) to be recorded on the recording medium may be those specially designed and configured for the present invention or may be those known to those skilled in the computer software. Examples of the computer-readable recording medium include magnetic media such as a hard disk, a floppy disk and a magnetic tape, optical media such as a CDROM and a DVD, magneto-optical media such as a floppy disk, Hardware devices that are specifically configured to store and execute program instructions such as magneto-optical media, ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be appreciated that one embodiment is possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the claims.

10: first nonvolatile memory
11: kernel area
15: User area
20: second nonvolatile memory
30: DRAM
40: CPU
50: device
60: Storage device
70: Control module

Claims (16)

A computing device comprising a first non-volatile memory, a second non-volatile memory, and a DRAM,
Receiving a boot command,
Restoring the kernel data stored in the second nonvolatile memory into the kernel area of the first nonvolatile memory if the fast boot execution is possible,
Deleting the update data stored in the DRAM,
And restoring the CPU data and the device data stored in the second nonvolatile memory to the CPU and the device, respectively. The method according to claim 1,
And performing a cold boot if the fast boot execution is not possible. The method according to claim 1,
Receiving a write command in the first non-volatile memory,
A step of generating a fault,
Storing the kernel original data in the kernel area in the second nonvolatile memory if the fault occurrence area is the kernel area,
Releasing read-only access to the kernel original data area of the first non-volatile memory,
And writing to the kernel source data area. The method of claim 3,
And writing to the DRAM if the fault occurrence area is not the kernel area. 5. The method of claim 4,
Receiving the read-only command of the first non-volatile memory,
Storing the CPU data and the device data in the second nonvolatile memory,
Further comprising changing the first non-volatile memory to read-only. A computing device comprising a first non-volatile memory, a second non-volatile memory, and a DRAM,
Receiving a boot command,
If the booting method is the fast boot, checking whether or not the cold boot has been performed,
Determining whether read-only operation of the first nonvolatile memory has been performed, if the cold boot has been performed, checking whether CPU data and device data are stored in the second nonvolatile memory,
Volatile memory, wherein when the CPU data and the device data are stored in the second non-volatile memory and the read-only operation of the first non-volatile memory is performed, the kernel data stored in the second non- Restoring to the area,
Deleting the update data stored in the DRAM,
And restoring the CPU data and the device data stored in the second nonvolatile memory into a CPU and a device, respectively. The method according to claim 6,
Determining whether the booting method is the cold boot if the booting method is not the fast booting and performing the cold boot if the booting method is the cold booting;
And if the cold boot has not been performed, performing the cold boot. 8. The method of claim 7,
The CPU data and the device data are stored in the second nonvolatile memory if the CPU data and the device data are not stored in the second nonvolatile memory and the read- And performing the read-only operation of the first non-volatile memory. 7. The method according to claim 2 or 6,
In the cold boot,
If the main memory is the first nonvolatile memory, bringing a kernel image file and a ramdisk file from the storage device into the first nonvolatile memory,
Decompressing the kernel image file and ramdisk file, and completing the kernel initialization process. A computing device comprising a first non-volatile memory, a second non-volatile memory, and a DRAM,
Receiving a write command in the first non-volatile memory,
A step of generating a fault,
Storing the kernel original data in the kernel area in the second nonvolatile memory if the fault occurrence area is the kernel area,
Releasing read-only access to the kernel original data area of the first non-volatile memory,
Writing to the kernel original data area,
And writing to the DRAM if the fault occurrence area is not the kernel area. 11. The method of claim 10,
Further comprising the step of modifying the page table. The method according to any one of claims 1, 6, and 10,
Wherein the first nonvolatile memory is a main memory. A first non-volatile memory,
A second nonvolatile memory,
DRAM,
Volatile memory to the kernel area of the first nonvolatile memory and deletes the update data stored in the DRAM when the fast boot execution is possible, And a control module for controlling restoration of CPU data and device data stored in the non-volatile memory to the CPU and the device, respectively. A first non-volatile memory,
A second nonvolatile memory,
DRAM,
Wherein the CPU determines whether a cold boot has been performed when the booting method is a fast boot if the booting method is a fast boot and stores CPU data and device data in the second nonvolatile memory when the cold booting has been performed, Volatile memory, and if the CPU data and the device data are stored in the second non-volatile memory and the read-only operation of the first non-volatile memory has been performed, Restoring the kernel data into the kernel area of the first nonvolatile memory, deleting the update data stored in the DRAM, and restoring the CPU data and the device data stored in the second nonvolatile memory into the CPU and the device, respectively And a control module for controlling the booting device. A first non-volatile memory,
A second nonvolatile memory,
DRAM,
Volatile memory, and when the fault occurrence area is the kernel area, storing the kernel original data of the kernel area in the second nonvolatile memory, A control module for controlling reading of the kernel original data area of the volatile memory, writing to the kernel original data area, and writing to the DRAM if the fault occurrence area is not the kernel area, Wherein the computing device is a computing device. A computer readable recording medium recording a program for performing the fast boot method according to any one of claims 1, 6, and 10.

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