CN100334556C - Start-up method and computer system thereof when central processing unit is down - Google Patents

Abstract

A starting-up method for warm or cold starting-up when CPU is shut down is used in computer system with CPU and memory. First, when the CPU is in a down state, it is detected whether a hardware reset function or a software reset function is to be executed by a user. Then, the CPU is restarted by executing a hardware reset operation. Then, when the user selects to execute the hardware reset function, the data and the set value of the memory are cleared, so that the computer system is returned to the preset state. Then, when the user selects to execute the software resetting function, the hardware resetting action is regarded as an action for replacing a software resetting action, and the computer system stores the data and the set value of the memory, so that the computer system is restored to the set state before the computer system is in the current state.

Description

Start-up method and computer system thereof when central processing unit is down

technical field

The present invention relates to a booting method and its computer system, and in particular to a booting method capable of warm booting or cold booting when a central processing unit is down and its computer system.

Background technique

Generally speaking, the computer system will provide a hardware reset function (Hardware reset function) and a software reset function (Software reset function), so as to make the computer system perform a cold boot (cold boot) and a warm boot (warm boot) respectively. When the computer system crashes, the user can select a hardware reset function and a software reset function to restore the computer system to normal.

Wherein, the software reset function is to perform a system reset action in a software manner. However, when the computer system crashes even the central processing unit (CPU) of the computer system and cannot execute software instructions, the software reset function cannot be used. The hardware reset function refers to performing an action of resetting the computer system by means of hardware. Therefore, regardless of whether the CPU is down or not, this hardware reset function can be used. After executing the software reset function, the computer system will complete the warm boot (Warm boot), that is, the computer system will be restarted, and the current settings of the computer system and the synchronous dynamic memory (Synchronous Dynamic Random Access) stored in the computer system Memory, SDRAM) data still exist. And after executing the hardware reset function, the computer system is to complete the cold boot (Cold boot), that is, the computer system will restart and return to the default state when leaving the factory. All current settings of the computer system and data stored in SDRAM will disappear.

Please refer to FIG. 1 , which shows the main structure diagram of a traditional computer system. The traditional computer system 100 includes: a CPU 102 , an SDRAM 104 , a software reset generating circuit 106 and a hardware reset generating circuit 108 . The SDRAM 104 is used for storing data and setting values of the computer system 100 and is controlled by the CPU 102 . The software reset generating circuit 106 is used for sending a software reset signal SR to the CPU 102 to start the CPU 102 to perform a software reset when the user chooses to perform the software reset function. The hardware reset generating circuit 108 is used to send a hardware reset signal HR to the CPU 102 to start the CPU 102 to perform a hardware reset when the user chooses to perform the hardware reset function.

Please refer to FIG. 2 , which is a flow chart of a method for warm booting or cold booting of the conventional computer system 100 . Firstly, step 202 is executed to determine whether the CPU 100 is in a shutdown state, if yes, execute step 204 ; if not, execute step 206 . In step 204, since the CPU 102 has been shut down, the CPU 102 cannot execute the software reset action, so the user can only select the hardware reset function. After step 204 , enter step 208 , the computer system 100 performs a cold boot, and all data and setting values stored in the SDRAM 104 will disappear.

When the CPU 102 is not down, the user can select a hardware reset function or a software reset function. Therefore, in step 206 , the computer system 100 determines whether the user selects the hardware reset function or the software reset function. If the user selects the software reset function, then step 210 is performed, and the computer system 100 is warmed up, and all data and setting values stored in the SDRAM 104 will be fully reserved; if the user selects the software reset function, then step 208 is performed. .

In the conventional computer system 100, when the CPU 102 is down, the computer system 100 cannot perform a software reset operation, but can only perform a hardware reset operation to complete a cold boot. However, when the computer system 100 is cold booted, the data stored in the SDRAM 104 and the settings of the computer system 100 before the computer system shuts down will completely disappear. For the user, the user has to reset the computer system 100, which is a waste of time, and important data may be lost, causing serious damage to the user.

Contents of the invention

In view of this, the object of the present invention is to provide a booting method and computer system thereof capable of warm booting or cold booting when the central processing unit is down. The present invention allows the user to still select the software reset function for warm booting when the CPU is down. In this way, the data and setting values stored in the SDRAM before the computer system is turned on can be saved, thereby avoiding the traditional shortcoming of important data loss, and saving the time wasted for the user to reset the computer system.

According to the object of the present invention, a booting method for warm booting or cold booting is proposed when the central processing unit is down, which is used in a computer system. The computer system has a CPU and a memory, the CPU is used to control the memory, and the memory is used to store data and setting values of the computer system. The booting method of the present invention includes: firstly, when the CPU is in a shutdown state, the computer system detects whether a user wants to execute a hardware reset function or a software reset function. Then, the CPU is restarted by performing a hardware reset operation. Then, when the user chooses to execute the hardware reset function, the data and setting values in the memory are cleared, so that the computer system returns to the default state. Afterwards, when the user chooses to execute the software reset function, the hardware reset action is regarded as an action to replace a software reset action, and the computer system saves the data and setting values of the memory, so that the computer system returns to the current setting. fixed state.

According to another object of the present invention, a computer system that can perform warm boot or cold boot when the CPU is down is proposed, including: a CPU, a memory, a judgment combination circuit, a hardware reset combination circuit, a software reset A reset generation circuit and a hardware reset generation circuit. The memory is used to store data and setting values of the computer system, and is controlled by the CPU. The judging combination circuit is used to judge whether the CPU is down. The hardware reset combination circuit is electrically connected with the CPU and controlled by the judgment combination circuit. The software reset generation circuit is used for sending a software reset signal to the CPU and the judging combination circuit when the user chooses to perform the software reset function. The hardware reset generation circuit is used to send a first hardware reset signal to the judging combination circuit and the hardware reset combination circuit when the user chooses to perform the hardware reset function. Wherein, when the judging combination circuit receives the software reset signal and judges that the CPU is in a shutdown state, the judging combination circuit controls the hardware reset combination circuit so that the hardware reset combination circuit sends a second hardware reset signal to the CPU, to restart the CPU. Afterwards, the judging combination circuit sends a judging signal to the CPU to inform the CPU that the second hardware reset signal is an indication signal to replace the software reset signal, and then the computer system saves the data and setting values of the memory so that the computer system returns to the current state. The setting state before the machine. And when the hardware reset combination circuit receives the hardware reset signal, the hardware reset combination circuit sends a second hardware reset signal to the CPU to restart the CPU, and the CPU clears the data and setting values of the memory, so that the computer The system returns to the default state.

The present invention also provides a booting method capable of warm booting or cold booting when the central processing unit is down, which is used in a computer system. Set combination circuit, a software reset generation circuit and a hardware reset generation circuit, the memory is used to store the data and setting values of the computer system, and is controlled by the CPU, the judgment combination circuit is used to judge the Whether the CPU is down, the hardware reset combination circuit is electrically connected to the CPU and controlled by the judgment combination circuit, and the software reset generation circuit is used to transmit a software when the user chooses to perform the software reset function A reset signal is sent to the CPU and the judging combination circuit, and the hardware reset generation circuit is used to send a first hardware reset signal to the judging combination circuit and the hardware reset function when the user chooses to perform a hardware reset function. The combined circuit is set, and the starting method includes: (a) judging whether the CPU is in a shutdown state, if so, entering step (b); (b) judging whether a user wants to perform a hardware reset function or a software reset Setting function, when the user wants to execute the software reset function, enter step (c), when the user intends to execute the hardware reset function, enter step (d); (c) when the judging combination circuit receives the software reset signal, and after the judging combination circuit learns that the CPU is in a shutdown state, the judging combination circuit controls the hardware reset combination circuit so that the hardware reset combination circuit sends the second hardware reset signal to the CPU, to restart the CPU, and enter step (e); (d) after the hardware reset combination circuit receives the first hardware reset signal, the hardware reset combination circuit sends the second hardware reset signal to The CPU, to restart the CPU, and enter step (e); (e) after the CPU restarts, the CPU receives a judgment signal sent from the judgment combination circuit, if the CPU knows according to the judgment signal When the second hardware reset signal is an indication signal to replace the software reset signal, then enter step (f); if the CPU judges that the second hardware reset signal represents that the hardware reset action should be performed according to the judgment signal When indicating signal, enter step (g); (f) judge whether the data on this memory is correct, if so, then save the data and setting value of this memory, make this computer system return to the setting state before the machine to finish Warm boot, if not, then enter step (g); and (g) clear the data and setting values of the memory, make the computer system return to the default state to complete the cold boot, and end the method.

In the present invention, when the CPU is down, the user can still perform a warm boot to save the existing data and setting values in the SDRAM.

Description of drawings

FIG. 1 shows the main structure diagram of a traditional computer system;

Fig. 2 depicts a flowchart of a method for warm booting or cold booting of a traditional computer system;

FIG. 3 shows a structure diagram of a computer system capable of warm booting or cold booting when the CPU is down according to a preferred embodiment of the present invention; and

4A to 4C are detailed flowcharts of the booting method of the present invention.

Explanation of reference numbers

100, 300: computer system 102, 302: CPU

104, 304: SDRAM 106, 306: Software reset generating circuit

108, 308: Hardware reset generating circuit 202～210, 402～422: Process steps

310: Judgment combination circuit 312: Hardware reset combination circuit

Detailed ways

In order to make the above-mentioned purposes, features, and advantages of the present invention more obvious and understandable, a preferred embodiment is specifically cited below, and in conjunction with the accompanying drawings, the detailed description is as follows:

The main spirit of the method for warm booting or cold booting applied to a computer system of the present invention when the central processing unit is down is that when the CPU is in a down state, the computer system detects that a user wants to execute Hardware reset function or software reset function. Then, restart the CPU by performing a hardware reset operation. Then, when the user chooses to execute the hardware reset function, the data and setting values of the SDRAM are cleared, so that the computer system returns to the default state. And when the user chooses to execute the software reset function, the hardware reset action is regarded as an action to replace a software reset action, and the computer system saves the data and setting values of SDRAM, so that the computer system returns to the current setting. state. In the present invention, when the CPU is down, the user can still perform a warm boot to save the existing data and setting values in the SDRAM.

Please refer to FIG. 3 , which shows a structure diagram of a computer system capable of warm booting or cold booting when the CPU is down according to a preferred embodiment of the present invention. The computer system 300 of the present invention includes: a CPU 302 , an SDRAM 304 , a judgment combination circuit 310 , a hardware reset combination circuit 312 , a software reset generation circuit 306 and a hardware reset generation circuit 308 . The SDRAM 304 is used to store data and setting values of the computer system 300 and is controlled by the CPU 302 . The judging combination circuit 310 is used for judging whether the CPU 302 is down or not according to the shutdown signal CH. The hardware reset combination circuit 308 is electrically connected to the CPU 302 and controlled by the judgment combination circuit 310 . The software reset generation circuit 306 is used to send a software reset signal SR to the CPU 302 and the judgment combination circuit 310 when the user chooses to perform the software reset function, so as to notify the CPU 302 and the judgment combination circuit 310 that the user wants the computer system 300 to execute Software reset action. The hardware reset generation circuit 308 is used to send a first hardware reset signal HR1 to the judgment combination circuit 310 and the hardware reset combination circuit 312 when the user chooses to perform the hardware reset function, so as to notify the judgment combination circuit 310 And the hardware reset combination circuit 312 The user wants the computer system 300 to perform a hardware reset operation.

Wherein, when the judging combination circuit 310 receives the software reset signal SR and judges that the CPU 302 is in a shutdown state by the shutdown signal CH, the judging combination circuit 310 outputs a control signal CS to the hardware reset combination circuit 312 to notify the hardware reset The combination circuit 312 is configured to perform a hardware reset operation. At this time, the hardware reset combination circuit 312 will send a second hardware reset signal HR2 to the CPU 302 to restart the CPU. Afterwards, the judging combination circuit transmits a judging signal DT to the CPU to inform the CPU 302 that the second hardware reset signal HR2 is an indication signal replacing the software reset signal. Then, the computer system 300 saves the data and setting values of the SDRAM 304 to restore the computer system 300 to the current setting state. When the hardware reset combination circuit 312 receives the hardware reset signal HR1, the hardware reset combination circuit 312 sends a second hardware reset signal HR2 to the CPU 302 to restart the CPU 302 and make the CPU 302 perform a hardware reset action. The CPU 302 clears the data and setting values of the SDRAM 304, so that the computer system 300 returns to the default state.

Please refer to FIG. 4A to FIG. 4C , which are detailed flowcharts of the booting method of the present invention. Please also refer to Figure 3. The booting method of the present invention first executes step 402 to determine whether the CPU 302 is in a down state, if yes, then enters step 404; if not, then enters step 418. In step 404, it is determined whether a user wants to perform a hardware reset function or a software reset function. When the user wants to execute the software reset function, go to step 406; when the user wants to execute the hardware reset function, go to step 408.

Steps 406 to 410 are the steps of replacing part of the software reset action by performing a part of the hardware reset action. This part of the hardware reset action refers to only using the hardware reset action to restore the CPU 302 to a normal state to execute the software program. The CPU 302 then determines whether to clear the contents of the SDRAM 304 according to the judgment signal DT, so as to perform a complete hardware reset or software reset.

In step 406, when the judging combination circuit 310 receives the software reset signal SR, and the judging combination circuit 310 learns that the CPU is in a down state from the down signal CH, the judging combination circuit 310 sends a control signal CS to control the hardware reset The combination circuit 312 makes the hardware reset combination circuit 312 send a second hardware reset signal HR2 to the CPU 302 to restart the CPU 302 and enter step 410 .

In step 408, after the hardware reset combination circuit 312 receives the first hardware reset signal HR1, the hardware reset combination circuit 312 sends a second hardware reset signal HR2 to the CPU 302 to restart the CPU 302, and enter step 410 .

In step 410 , after the CPU 302 restarts, the CPU 302 receives the judgment signal DT sent from the judgment combination circuit 310 . If the CPU 302 learns that the second hardware reset signal HR2 is an indication signal to replace the software reset signal according to the judgment signal DT, then enter step 412; if the CPU 302 judges according to the judgment signal DT that the second hardware reset signal HR2 represents that the hardware When the indication signal of the action is reset, go to step 416 . In step 410 , the CPU 302 also sends out an initialization signal Int to initialize the judgment combination circuit 310 .

In step 412, judge whether the data on the SDRAM304 is correct, if so, then enter step 414, save the data and the setting value of SDRAM304, make computer system 300 return to the setting state before the current machine to complete the warm boot; if not, Then enter step 416, clear the data and setting values of the SDRAM 304, and make the computer system 300 return to the default state to complete the cold boot.

In addition, in step 402, after it is determined that the CPU 302 is not in a shutdown state, then step 418 is executed to determine whether the user wants to perform a hardware reset function or a software reset function. When the user wants to execute the software reset function, then enter step 420, CPU302 receives the software reset signal SR, executes the software reset action, CPU302 and sends the initialization signal Int, to initialize the judging combination circuit 310, then enters step 422, CPU302 restart, and the data and setting values in SDRAM 304 will be retained. When the user wants to execute the hardware reset function, step 424 is executed, the hardware reset combination circuit 312 receives the first hardware reset signal HR1, and sends out the second hardware reset signal HR2 to make the CPU 302 perform a hardware reset operation. At this point, the CPU302 will be restarted, and the data and setting values in the SDRAM304 will be cleared.

The computer system 300 of the present invention is preferably a personal digital assistant (Personal Digital Assistant, PDA), and the operating system of the PDA is preferably the WinCE system. SDRAM 304 can also be replaced by other memories with the same function, and the present invention is not limited to using SDRAM.

In the method and computer system disclosed in the above-mentioned embodiments of the present invention that can perform warm or cold boot when the central processing unit is down, when the CPU 302 is down and the user wants to perform a warm boot, the judging combination circuit 310 will judge that the CPU 302 It is in a crash state, and automatically executes a hardware reset action to restore the CPU 302 to a normal state, and informs the CPU 302 that this hardware reset action is an action to replace the software reset action, so that the data in the SDRAM 304 and The set value can be saved, and the computer system 300 can be restored to the state before the shutdown. For the user, regardless of whether the CPU 302 is down or not, the user can choose between a warm boot and a cold boot. For the user, it makes no difference whether the CPU hangs or not. Compared with the traditional method where the user can only choose a cold boot when the CPU is down, the present invention allows the user to choose a warm boot when the CPU is down, so as to restore the data and setting values stored in SDRAM. Avoid the loss of important data, and save the time wasted for users to reset the computer system.

In summary, although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Those skilled in the art may make various modifications without departing from the spirit and scope of the present invention. and retouching, so the scope of protection of the present invention should be defined by the appended claims.

Claims (10)

1. starting-up method that can warm up start or cold boot during when machine at central processing unit (CPU), be to use in a computer system, this computer system has a CPU and a storer, this CPU is in order to control this storer, this storer is in order to data of storing this computer system and setting value, and this starting-up method comprises:

(a) when CPU is in when the machine state, what this computer system detected the desire execution of user institute is hardware function of reset or software-reset function;

(b) reset action so that CPU is restarted by carrying out a hardware;

(c) when this user selects to carry out the hardware function of reset, remove the data and the setting value of this storer, make this computer system be returned to preset state; And

(d) when this user selects the executive software function of reset, the action of resetting of this hardware is regarded as substituting the action of software-reset action, and this computer system is preserved the data and the setting value of this storer, makes this computer system return to set condition before machine.

2. starting-up method as claimed in claim 1, wherein, this step (d) also comprises the action that the data judged on this storer are whether correct, if, then this computer system is preserved the data and the setting value of this storer, makes this computer system return to set condition before machine; If not, then remove the data and the setting value of this storer, make this computer system be returned to preset state.

3. starting-up method as claimed in claim 1, wherein, this computer system is a personal digital assistant, and this storer is a synchronous dynamic storage (SDRAM), and the operating system of this personal digital assistant is the WinCE system.

4. computer system that can warm up start or cold boot at central processing unit during when machine comprises:

One CPU;

One storer in order to the data and the setting value of storing this computer system, and is controlled by this CPU;

One judges combinational circuit, is in order to judge whether this CPU works as machine;

One hardware replacement combinational circuit is to electrically connect with this CPU, and is controlled by this judgement combinational circuit;

One software-reset produces circuit, in order to when the user selects to carry out the software-reset function, transmits a software-reset signal to this CPU and this judgement combinational circuit; And

One hardware is reset and is produced circuit, in order to when the user selects to carry out the hardware function of reset, transmits one first hardware reset signal to this judgement combinational circuit and this hardware replacement combinational circuit;

Wherein, when judging that combinational circuit receives this software-reset signal, and judge this CPU for when the machine state, this judgement combinational circuit is controlled this hardware replacement combinational circuit, make this hardware replacement combinational circuit send one second hardware reset signal to this CPU, so that CPU is restarted, afterwards, this judgement combinational circuit is to transmit one to judge that signal is to CPU, to inform that this second hardware reset signal of this CPU is for substituting the indicator signal of this software-reset signal, then, this computer system is preserved the data and the setting value of this storer, makes this computer system return to set condition before machine;

Wherein, when this hardware replacement combinational circuit received this hardware reset signal, this hardware replacement combinational circuit transmitted one second hardware reset signal to this CPU, so that CPU is restarted, this CPU also removes the data and the setting value of this storer, makes this computer system be returned to preset state.

5. computer system as claimed in claim 4, wherein, preserve in this computer system before the data and setting value of this storer, whether correct this computer system carry out the action of the data judged on this storer earlier, if, then this computer system is preserved the data and the setting value of this storer, makes this computer system return to set condition before machine; If not, then remove the data and the setting value of this storer, make this computer system be returned to preset state.

6. starting-up method as claimed in claim 4, wherein, this computer system is a personal digital assistant, and this storer is a SDRAM, and the operating system of this personal digital assistant is the WinCE system.

7. starting-up method that can warm up start or cold boot during when machine at central processing unit, be to use in a computer system, this computer system has a CPU, one storer, one judges combinational circuit, one hardware replacement combinational circuit, one software-reset produces circuit and hardware replacement produces circuit, this storer is in order to data of storing this computer system and setting value, and controlled by this CPU, this judges that combinational circuit is in order to judge whether this CPU works as machine, this hardware replacement combinational circuit is that this CPU electrically connects, and controlled by this judgement combinational circuit, it is in order to when the user selects to carry out the software-reset function that this software-reset produces circuit, transmit a software-reset signal to this CPU and this judgement combinational circuit, and this hardware replacement generation circuit is in order to when the user selects to carry out the hardware function of reset, transmit one first hardware reset signal to this judgement combinational circuit and this hardware replacement combinational circuit, this starting-up method comprises:

(a) judge whether this CPU is in when the machine state, if then enter step (b);

What (b) judgement one user institute desire was carried out is hardware function of reset or software-reset function, when this user desires the executive software function of reset, enters step (c), when this user's desire is carried out hardware function of reset, enters step (d);

(c) receive this software-reset signal when this judgement combinational circuit, and this judgement combinational circuit learns that this CPU is for after the machine state, this judgement combinational circuit is controlled this hardware replacement combinational circuit, make this hardware replacement combinational circuit send this second hardware reset signal to this CPU, so that this CPU is restarted, and enter step (e);

(d) after this hardware replacement combinational circuit receives this first hardware reset signal, this hardware replacement combinational circuit sends this second hardware reset signal to this CPU, so that this CPU is restarted, and enters step (e);

(e) after this CPU restarts, this CPU receives a judgement signal that sends from this judgement combinational circuit, if this CPU learns that according to this judgement signal this second hardware reset signal is when substituting the indicator signal of this software-reset signal, then enter step (f), if when this CPU judges the indicator signal of this second hardware reset signal representative should carrying out hardware replacement action according to this judgement signal, enter step (g);

(f) judge whether the data on this storer are correct, if, the data and the setting value of then preserving this storer, the set condition that this computer system is returned to before machine warms up start to finish, and if not, then enters step (g); And

(g) remove the data and the setting value of this storer, make this computer system be returned to preset state finishing cold boot, and method ends.

8. starting-up method as claimed in claim 7, wherein, this computer system is a personal digital assistant, and this storer is a SDRAM, and the operating system of this personal digital assistant is the WinCE system.

9. starting-up method as claimed in claim 7, wherein, this step (a) also comprises, be in when the machine state if this CPU is non-, what then judge this user institute desire execution is hardware function of reset or software-reset function, and when this user desired the executive software function of reset, this CPU received this software-reset signal, executive software is reset and is moved, and initialization should be judged combinational circuit; When this user's desire was carried out the hardware function of reset, this hardware replacement combinational circuit received this first hardware reset signal, and sent this second hardware reset signal so that this CPU carries out hardware replacement action.

10. starting-up method as claimed in claim 7, wherein, this step (e) comprises that also this CPU initialization should be judged combinational circuit.

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