JP2574938B2 - System startup method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a system startup method for starting and restarting a computer system, an object of the present invention is to provide a system startup method capable of automatically restarting at a high speed, and independently providing different programs. A plurality of MPUs that execute
In a computer system having a monitoring device for monitoring a PU, the monitoring device is a non-volatile memory storing two types of IPL information required for system startup during normal and system down, and a startup register for activating the MPU And the MPU
A halt monitoring register for monitoring the state of the MPU
An IPL trigger register for holding a start factor from the start register, a state display register for notifying the halt monitoring register of a state, a read / write mechanism for reading / writing the nonvolatile memory, and an IPL trigger register. And a determination unit for recognizing the activation factor and determining the necessity of collecting the abnormality information, and a determination unit for determining a restart processing sequence.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system starting method for starting and restarting a computer system.

In a computer system, a system failure may occur due to a software failure or the like. Obstacles due to such a computer system failure may develop into social problems. Therefore, it is necessary to recover the computer system in which the system went down at an early stage.

[Prior Art] A plurality of MPUs having a function of independently executing a program
In a computer system having a monitoring device for monitoring these MPUs, the monitoring device monitors the states of all MPUs using a halt monitoring register.

When the monitoring device detects that the MPU is in the halt state using the halt monitoring register, the monitoring device itself starts a dump program for collecting abnormality information, and then executes an IPL operation for restart. I was

[Problems to be Solved by the Invention] However, in such a conventional system booting method, the monitoring system is mainly responsible for restarting the computer system, that is, when collecting the abnormal information. Since the monitoring device determines the necessity and determines the processing sequence for the restart, the computer system having a plurality of MPUs has a problem that the time until the restart is completed is long.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a system start-up method capable of automatically restarting at high speed.

[Means for Solving the Problems] FIG. 1 is an explanatory view of the principle of the present invention.

In FIG. 1, in a computer system having a plurality of MPUs (5) that independently execute different programs and a monitoring device (1) that monitors the MPU (5), the monitoring device (1) is different from a normal time. Monitors a non-volatile memory (2) storing two types of IPL information required for system startup when the system goes down, a start register (3) for starting the MPU (5), and a state of the MPU (5). The MPU (5) is provided with an IPL trigger register (8) for holding an activation factor from the activation register (3), and notifies the status to the halt monitoring register (4). A status display register (9), a read / write mechanism (10) for reading / writing the nonvolatile memory (2),
A determining unit that reads out the IPL trigger register (8), recognizes the activation factor, and determines the necessity of collecting abnormal information;
A determination unit that determines a restart processing case.

[Operation] In the present invention, the MPU always displays the operation / halt state in the state display register. The display data of the status register is sent to the halt monitoring register of the monitoring device, and the monitoring device monitors the two states of all the MPUs.

The monitoring device monitors the state of the MPU using the halt monitoring register, and when detecting the MPU in the halt state, instructs the resetting of the MPU in the halt state using the activation register.

This reset instruction resets the MPU and holds the reset cause by the monitoring device in the IPL register. The reset MPU checks the IPL trigger register, recognizes that the reset cause holds the reset cause by the monitoring device, and reads the IPL information indicating the system IPL operation after the occurrence of an error using the read / write mechanism. , Collect failure information that specifies IPL information, and then start the system
Perform processing.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

2 and 3 are views showing an embodiment of the present invention.

In FIG. 2, reference numeral 1 denotes a monitoring device (service processor). The monitoring device 1 has a nonvolatile memory 2, a start register 3, and a halt monitoring register 4.

In the non-volatile memory 2, the IO device number at the time of restarting, a normal startup operation parameter (hereinafter, referred to as IPL parameter 1), and a restart parameter at the time of system down (hereinafter, referred to as 1PL parameter 2). Is stored.

The activation register 3 activates each MPU 5. The halt monitoring register 4 monitors the state of each MPU 5.

Each MPU 5 has a CPU 6, a ROM 7, an IPL trigger register 8,
It has a status display register 9, a read / write mechanism 10, and the like.

The ROM 7 stores a program (IPL program) 11 necessary for IPL (initial program load).

The IPL trigger register 8 holds the activation factor from the activation register 3. The status display register 9 is for notifying the halt monitoring register 4 of the status. The read / write mechanism 10 is for reading and writing the nonvolatile memory 2.

 Next, the operation will be described.

FIG. 3 is a flowchart showing an operation sequence.

In FIG. 3, first, in step S1, the start register 3
Notifies the IPL trigger register 8 of each MPU 5 of a normal start instruction.

Next, in step S2, each MPU 5 obtains the contents (IO device number and IPL parameters 1 and 2) of the non-volatile memory 2 of the monitoring device 1 using the read / write mechanism 1.

Next, in step S3, the IPL program 11 of each MPU 5 reads the IPL trigger register 8, and recognizes normal startup as a startup factor.

Next, in step S4, since the activation factor is normal activation,
According to the instruction of the IPL parameter 1, the operating system is loaded from the IO device number.

Next, the monitoring device 1 monitors the status of all the MPUs 5 by the halt monitoring register 4, and in step S5, a certain MP
If U5 detects that it is in the halt state,
In S6, the MPU 5 is restarted using the start register 3.

Next, the MPU 5 restarted in step S7 obtains the contents of the nonvolatile memory 2 of the monitoring device 1 as in the normal case. Then, in step S8, the IPL program 11 of the MPU 5
Is read from the IPL trigger register 8 and recognizes restart as a start factor here.

Next, in step S9, since the activation factor is restart,
In accordance with the instruction of the L parameter 2, failure information is collected, and in step S10, an operating system for restarting from the IO device number is loaded.

Since the MPU 5 itself determines the necessity of collecting the abnormal information and determines the processing sequence of the restart, the restart can be automatically performed at a high speed.

In the present embodiment, the IPL parameters 1 and 2
Not only the operation instruction of the program 11 but also the cooperation with the operating system can be used for the automatic instruction of the data restoration process to be performed by the operating system. Further, by using the read / write device 10 and changing the IPL parameters 1 and 2 and the IO device number by the operating system, the operating system can be used for updating the operating system while the system is operating.

In the above-described embodiment, the monitoring device 1 and the MPU 5 are separated from each other. However, by equipping each MPU 5 with the function of the monitoring device 1, the reliability of the monitoring and restarting process can be further improved.

[Effects of the Invention] As described above, according to the present invention, each MPU determines the necessity of collecting abnormal information and determines a processing sequence for restarting, etc. It is possible to perform a restart.

[Brief description of the drawings]

 FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a diagram showing one embodiment of the present invention, and FIG. 3 is a flowchart for explaining the operation. In the figure, 1 ... monitoring device, 2 ... non-volatile memory, 3 ... start register, 4 ... halt monitoring register, 5 ... MPU, 6 ... CPU, 7 ... ROM, 8 ... IPL trigger register, 9: Status display register, 10: Read / write mechanism, 11: Program.

Claims (1)

(57) [Claims] A plurality of independent programs for executing different programs;
MPU (5) and monitoring device (1) for monitoring the MPU (5)
The monitoring device (1) includes a non-volatile storage (2) storing two types of IPL information necessary for system startup during normal and system down times, and a monitor for starting the MPU (5). A start monitor register (3) and a halt monitor register (4) for monitoring the state of the MPU (5), wherein the MPU (5) stores an IPL trigger register (8) for holding a start factor from the start register (3); ), A status display register (9) for notifying a status to the halt monitoring register (4), and a read / write mechanism (10) for reading and writing the nonvolatile memory (2).
And a determination unit that reads the IPL trigger register (8) to recognize the activation factor and determines the necessity of collecting the abnormality information, and a determination unit that determines the case of restart processing. Characteristic system startup method.