JPS59119451A - Diagnosing system of electronic computer system - Google Patents

Abstract

PURPOSE:To eliminate the necessity of installation of a special diagnosing device and to enable diagnosision troubles, of all devices and to improve reliability by diagnosing each other using processors constituting the system. CONSTITUTION:A CPU1 and a processor 8 for controlling peripheral devices in an electronic computer system are operated as a diagnosing processor or processor to be diagnosed and a diagnosis on trouble is executed mutually. In addition to a common but sigal line (a), signal lines b-g and b'-g' are provided between the CPU1 and processor 8. The diagnosis is executed making the CPU a diagnosing processor and making the processor 8 a diagnosed processor using signal lines b-g. Contrarily, the diagnosis is executed making the processor 8 a diagnosing processor and making the CPU a processor to be diagnosed using signal lines b'-g'.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an electronic computer system comprising a central processing unit, a storage device, a peripheral device, and a peripheral control device having a peripheral device control processor that controls the peripheral device. The present invention relates to a diagnostic method for an electronic computer system in which a central processing unit and a peripheral control processor are operated as a diagnostic processor or a processor to be diagnosed, respectively, to diagnose the electronic computer system.

[Prior art and problems]

FIG. 1 is a diagram showing an example of a conventional electronic computer system equipped with a diagnostic device. In FIG. 1, ■ is a CPU (central processing unit), 2 is a storage device, 3 is a diagnostic device, 4 is a diagnostic processor, 5 is a floppy disk device, 6 is a display device, 7 is a peripheral control device, and 8 is a A peripheral device control processor, 9 indicates a disk device.

Conventionally, as shown in FIG. 1, in a computer system equipped with a CPU, a storage device 2, a peripheral control device 7, a disk device 9, and other peripheral devices, a dedicated diagnostic device is provided for diagnosing system failures. is normal. However, the diagnostic device 3 has a special fault diagnosis processor 4.
It is a large-scale device, including a floppy disk device 5 for storing diagnostic programs and other files, and a display device 6 for monitoring. Providing such a device exclusively for diagnosing system failures would be wasteful to the system and would also increase the cost of the system. On the other hand, there are also systems in which such a diagnostic device is not provided, and the CPU 1 performs diagnosis to detect a failure and perform processing such as file protection after the failure occurs. However, this configuration also has the drawback that when a CPUI malfunctions, it is difficult to detect the malfunction, and processing after detection is impossible.

By the way, as shown in FIG. 1, the peripheral control device 7 includes:
Although small in size, devices equipped with a peripheral device control processor 8 are becoming common. As shown in FIG. 1, a peripheral device control processor 8 that controls a disk device 9 as a peripheral device generally performs formatting processing and processing for linking and collectively transferring data when sending data to the CPUI. Such a peripheral device control processor is included in most peripheral control devices.

[Purpose of the invention]

The present invention is based on the above consideration, and even if a device such as a special processor is not available for fault diagnosis,
It is an object of the present invention to provide a diagnostic method for an electronic computer system that can perform failure diagnosis.

[Structure of the invention]

For this purpose, the diagnostic method for the computer system of the present invention is as follows:
A diagnostic method for a computer system comprising a central processing unit, a storage device, a peripheral device, and a peripheral control device having a peripheral device control processor for controlling the peripheral device, the central processing unit and the peripheral device control processor controlling the peripheral device. Each processor has a means for sending a diagnosis start notification to the diagnosed processor, a means for receiving a diagnosis start confirmation notification sent from the diagnosed processor, and a means for receiving a diagnosis start confirmation notification from the diagnosed processor, in order to operate as a diagnostic processor. Means for receiving diagnostic pattern data on the condition that a signal notifying that the diagnostic pattern data is valid is sent when a diagnosis start confirmation notification is being sent, and a stop signal for a processor to be diagnosed. means for notifying the processor to be diagnosed and each device of the abnormality of the processor to be diagnosed;
a memory for storing data, a means for receiving a diagnosis start notification sent from the diagnostic processor, a means for sending a diagnosis start confirmation notification to the diagnostic processor, and a means for transmitting a diagnosis start confirmation notification to the diagnostic processor in order to operate as a diagnosed processor. comprising means for sending a notification that the diagnostic pattern data is valid together with the diagnostic pattern data, means for receiving an error detection notification sent from the diagnostic processor, and a memory for storing the diagnostic pattern data, Further, the central processing unit and the peripheral device control processor operate as a diagnostic processor or a diagnosed processor between each other, and when performing a diagnosis, the diagnostic processor instructs to start the diagnosis, and the diagnosed processor starts the diagnosis. Confirm the start,
Thereafter, the diagnostic pattern data is sent from the processor to be diagnosed to the diagnostic processor where it is compared with the diagnostic pattern data stored in the memory;
The present invention is characterized in that it is configured to perform failure diagnosis.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing one embodiment of the present invention, FIG. 3 is a diagram showing one configuration example of a diagnostic device and a device to be diagnosed to which the present invention is applied,
FIG. 4 is a diagram showing the flow of processing during diagnosis between the diagnostic device and the device to be diagnosed, and FIG. 5 is a time chart showing changes in signal waveforms during diagnosis. In the figure, 1 is CP
U (central processing unit), 8 is a peripheral control processor, 10 is a diagnostic device, 11 is a device to be diagnosed, 13 and 20 are R
OM.

14 is a HALT control unit, 15 and 21 are diagnostic start control units,
16 and 22 are diagnosis start confirmation control units, 17 is a buffer, 1
8 is an A/D Φ game), 2'3 is a diagnostic pattern control unit, 2
Reference numerals 4 and 25 indicate error detection units, ◯ indicates a common bus signal line, ◯ to ◯ and ◯' to @I indicate signal lines.

The present invention enables mutual fault diagnosis to be performed by operating a CPU (central processing unit) and a processor for controlling peripheral devices in a computer system as a diagnostic processor or a processor to be diagnosed, respectively. .

In FIG. 2, between the CPU 1 and the peripheral device control processor 8, in addition to the common bus signal line 2, signal lines 1 to 2 and 2' are provided for diagnostic purposes. Diagnosis is then executed using the signal lines ■ to ■ as the diagnostic processor and the peripheral device control processor 8 as the processor to be diagnosed. Diagnosis is performed using the CPUI as the processor to be diagnosed.

FIG. 3 shows a specific example of the configuration of the diagnostic device and the device to be diagnosed. In FIG. 3, the diagnostic device 10 includes a program 12, a ROM 13, and a HALT control unit 1.
4, a diagnosis start control section 15, a diagnosis start confirmation control section 16, a buffer 17, an AND gate 18, and a detection section 25;
20, diagnosis start control section 21, diagnosis start confirmation control section 22,
It includes a diagnostic pattern control section 23 and an error detection section 24. Therefore, processor 12 is the diagnostic processor and processor 19 is the processor to be diagnosed. ROM2
0 stores various diagnostic pattern data for notifying the diagnostic device 10 of diagnostic results, and the ROM 13 stores diagnostic patterns and data for determining the diagnostic pattern data notified from the device to be diagnosed 11. Data is stored. Signal lines (1) to (2) correspond to signal lines (1) to (2) when diagnosing the CPU I as a diagnostic processor and the peripheral device side-main processor 8 as the processor to be diagnosed in FIG.

Next, the diagnostic processing using the configuration shown in FIG. 3 will be explained with reference to FIGS. 4 and 5. The codes are from Figure 3 to Figure 5.
They correspond to each other in the figure.

■ When diagnosing the device to be diagnosed 11 in the diagnostic device 10, first, the diagnosis start control section 15 sends a signal to the processor 1.
According to the instruction in step 2, a device diagnosis start signal is sent to the signal line ■. In the device to be diagnosed 11, when the device diagnosis start signal is sent, the diagnosis start control section 21 issues an interrupt to the processor 19.

(2) When the interrupt is accepted by the processor 19, a device diagnosis start confirmation signal is sent to the signal line O from the diagnosis start confirmation control section 22 in accordance with the instruction from the processor 19.

■ Next, from the diagnostic pattern controller 23, the device to be diagnosed 1
A diagnostic pattern signal corresponding to the state 1 is sent to the signal line @, and at the same time a diagnostic pattern strobe signal indicating that the data is "valid" is sent to the signal line -.

(2) In the diagnostic device 10, when the device diagnosis start confirmation signal is sent, the diagnosis start confirmation control section 16 interrupts the processor 12 to start diagnostic processing. Subsequently, when a diagnostic pattern signal is sent, the diagnostic pattern data is stored in the buffer 17 on the condition that a diagnostic pattern strobe signal is sent.

■ The processor 12 reads the pattern data stored in the buffer 17 and compares it with the pattern data stored in the ROM 13. ■ The processor 12 checks whether there is any abnormality as a result of the comparison by the processing in step (0). , If Yes, the diagnosis is finished, if NO, ■
Process.

To determine whether there is an abnormality, a method is adopted in which it is determined that there is no abnormality when predetermined pattern data or sequential pattern data in a predetermined order is sent as diagnostic pattern data. Of course, it is also possible to adopt a method in which the status of each part of the device 11 is divided into a plurality of pattern data and sent. In that case, whether the pattern data sent is pattern data indicating a normal state or not. Determination as to whether the pattern data indicates an abnormal state is made by referring to the pattern data stored in the ROM13. For a normal state or a slight abnormal state, it may be determined that there is no abnormality. Furthermore, the diagnostic results may be recorded as necessary.

(2) An error detection signal is sent to the signal line (2), and if it is determined to be abnormal again, an I-IALT signal is sent to the signal line to stop the device to be diagnosed 110 and the processor 19. In addition, as described in (2), when pattern data is sent depending on the content of the abnormality, a HALT signal is immediately sent to the signal line (2) depending on the content, and the device to be diagnosed 11
The processor 19 is stopped.

If the diagnostic pattern data with the predetermined content is not sent because the processor 19 is out of order, or if a device diagnosis start confirmation signal is not sent even after a certain period of time has passed due to other reasons. In these cases, it is not possible to compare the data with the pattern data stored in the ROM 13 of the diagnostic device 10, so it is determined that it is an error and the diagnosis must be performed again, or another device may be used. By notifying the device of the error detection, diagnosis can be performed from other devices as well, and a failure of the device to be diagnosed can be determined. In the example shown in FIG. 3, the device HALT signal is sent directly to the processor 19 through the signal line;
A processor with terminals is used. Note that the content of the error detection section 24 is notified to the processor 19 by an interrupt, and the processor 19 uses the interrupt to refer to the error detection section 24 and confirm that an error has occurred.

FIG. 6 is a diagram showing an example of application of the present invention. In FIG. 6, 26 is a CPU (central processing unit), 27 and 28 are peripheral device control processors, and ■, ■, and ◎ indicate diagnostic control signal lines. ■ and ◎ of the diagnostic control signal line are the second
It includes ■ to ■ and ■' to @' shown in the figure. In this way, the CPU (central processing unit) 26 and a processor for controlling multiple peripheral devices? 27 and 28, for example, when an error is detected by diagnosing the CPU (central processing unit) 26 from the peripheral device control processor 27, the CPU (central processing unit) 26 is not stopped immediately and the peripheral device control processor 28 Diagnose and reconfirm the processing device) 26,
When an error is detected again, CPU (Central Processing Unit) 2
It can be said that 6 is stopped. By adopting such a diagnostic method, it is possible to prevent an error from being erroneously detected in the event of a failure of the processor performing the diagnosis, and it is possible to improve the reliability of the system.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, since the processors constituting the system are used to perform mutual diagnosis, it is not necessary to provide a special device such as a diagnostic processor for diagnosis. Since there is no problem and diagnosis can be performed between devices, it is possible to perform failure diagnosis for all devices and improve reliability.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a conventional electronic computer system equipped with a diagnostic device, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG.
The figure shows an example of the configuration of a diagnostic device and a device to be diagnosed to which the present invention is applied, FIG. 4 is a diagram showing the flow of processing during diagnosis between the diagnostic device and the device to be diagnosed, and FIG. FIG. 6 is a time chart showing changes in signal waveforms during diagnosis, and is a diagram showing an application example of the present invention. 1 and 26...CPU (central processing unit), 2...Storage device, 3...Diagnostic device, 4...Diagnostic processor,
5...7o Tsupii fist disk device, 6...Display device, 7...Peripheral control device, 8.27 and 28...
・Peripheral device control processor, 9...disk device,
10...Diagnostic device, 11...Diagnosed device, 12 and 1
9... Processor, 13 and 20... ROM, 14.
...HALT control unit, 15 and 21...Diagnosis start control unit, 16 and 22...Diagnosis start confirmation control unit, 17...Buffer, 18...AND gate, 23...Diagnosis pattern control Parts, 24 and 25... Error detection part, ■...
・Common bus signal line, ■ or @ and O' or @...
Signal lines, ■, ■ and ◎... Control signal lines for diagnosis. Patent Applicant Panafacom Co., Ltd. Representative Patent Attorney Kyotani Yobufu 4 Diagram Support S Diagram Device 1 Present

Claims (1)

[Claims] A method for diagnosing a computer system comprising a central processing unit, a storage device, a peripheral device, and a peripheral control device having a peripheral device control processor for controlling the peripheral device, the method comprising the central processing unit and the peripheral device control device. In order to operate as a diagnostic processor, each processor has a means for sending a diagnosis start notification to the diagnosed processor, a means for receiving a diagnosis start confirmation notification sent from the diagnosed processor, and a means for receiving a diagnosis start confirmation notification sent from the diagnosed processor. means for receiving diagnostic pattern data on the condition that a signal notifying that the diagnostic pattern data is valid is sent when a diagnosis start confirmation notification is being sent from the processor, and stopping the diagnosed processor; It includes a means for sending a signal, a means for notifying the processor to be diagnosed and each device of an abnormality in the processor to be diagnosed, and a memory for storing diagnostic pattern data. means for receiving an incoming diagnosis start notification, means for sending a diagnosis start confirmation notification to a diagnostic processor, means for sending a notification that the diagnostic pattern meeting data is valid together with the diagnostic pattern data to the diagnostic processor; The central processing unit and the peripheral device control processor are provided with means for receiving an error detection notification sent from the processor, and a memory for storing diagnostic pattern data, and the central processing unit and the peripheral device control processor each have a diagnostic processor or When operating as a diagnostic processor and performing diagnosis, the diagnostic processor instructs the start of diagnosis, the processor to be diagnosed confirms the start of diagnosis,
Thereafter, the diagnostic pattern data is sent from the processor to be diagnosed to the diagnostic processor where it is compared with the diagnostic pattern data stored in the memory;
A method for diagnosing a computer system, characterized in that it is configured to diagnose a failure.