JPS626335A - Data processing system - Google Patents

Abstract

PURPOSE:To attain the initialization and diagnosis of an input device prior to the rise of a data processing system by giving an access to the input/output device of the system from a processor exclusive for maintenance/diagnosis for execution of the control of both initialization and diagnosis. CONSTITUTION:The memory area of a main storage 10 is divided into an area 600 used by a diagnosis controller 21 and an area 610 used by a data processing system 1 to undergo the control. When an input/output action is started through the controller 21, a channel program 60 is used and the start of the input/output action is informed to an input/output controller 13. When the input/output action is over and an input/output interruption is produced, a central processing unit 12 or the controller 21 is decided by an identifier and an interruption is informed to the corresponding device. Both the unit 12 and the controller 21 control the input/output devices 52-55 which are under the control of the system 1 via the memory area.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data processing system, and more particularly to the configuration of a maintenance/diagnosis processor that controls processing, maintenance, and diagnosis at the time of failure of each device constituting the system.

(Prior Art) Service processors have traditionally been employed in data processing systems as processors dedicated to maintenance and diagnosis. Such a service processor is for executing failure processing when a failure occurs in the data processing device, processing for maintenance of the pseudo panel function, and diagnostic processing in controlling the execution of a diagnostic program. Additionally, such a processor operates independently of the main body system, such as the central processing unit in a data processing system, and is itself a computing unit, main memory, and external storage such as a disk drive, as well as a console or printer. It is configured as an independent processor with a device.

Normally, the service processor is generally realized by a processor whose performance is lower than that of the main system equipment (hereinafter, this group of equipment is referred to as the data processing subsystem) that receives maintenance and diagnostic services from the service processor. The same service processor is commonly used for various data processing subsystems ranging from high performance to low performance.

On the other hand, the following method is adopted for diagnosing the data processing subsystem and its subordinate input/output devices.

In other words, for diagnosis of each device that makes up the data processing subsystem, there is a micro-diagnosis method that uses the firmware function of each device, and FLT (FLT) that uses a scan path.
Fault locating test: Fault
There are two types of diagnostic methods: locating Te5t) diagnostic methods, and software diagnostic methods that employ software instructions.

Micro diagnosis and FLT diagnosis usually employ a method of loading diagnostic data from a service processor and executing it.In the software diagnosis method, input/output devices under the data processing subsystem, ( A method is used to load failed data from a magnetic disk or magnetic tape device.When diagnosing an input/output device under a data processing subsystem, a diagnostic program for the input/output device to be diagnosed is executed on the data processing subsystem. ing.

(Problems to be Solved by the Invention) The conventional data processing system described above is configured so that notware diagnostic control of the data processing subsystem and input/output device is executed on the device to be diagnosed. In other words, when diagnosing a data processing subsystem, it is necessary to run a diagnostic control monitor on a faulty device, and when diagnosing an input/output device, it is necessary to load diagnostic data from the device being diagnosed. The disadvantage is that there are contradictions from viewpoints.

On the other hand, when starting up a system, a method is generally adopted in which the data processing subsystem is initialized and then bootloaded and programs are loaded. However, there is no effective means for initializing the input/output device to be bootloaded before bootloading.

An object of the present invention is to enable input/output devices to be accessed from a dedicated processor for maintenance diagnosis, so that the input/output devices can be accessed independently of the state before system startup or the operating state of software in the system main body. It is an object of the present invention to provide a data processing system configured to eliminate the above-mentioned drawbacks and realize the above-mentioned service functions on a device to be diagnosed by performing initial settings and diagnostic processing control.

(Means for Solving the Problems) A data processing system according to the present invention includes a data processing subsystem, a diagnostic control device, a service processor, and a storage device.

The data processing subsystem consists of at least one main storage device, a main storage control device, a central processing unit, and an input/output control device that controls input/output transfer between the input/output device and the main storage device. It is used to perform data processing.

The diagnostic control device is connected to each device that makes up the data processing subsystem via a diagnostic interface, and can access the main memory and start/stop input/output operations of the input/output control device. It is used to manage maintenance diagnosis control processing.

The service processor is connected to the diagnostic control device and is used to share a part of maintenance diagnostic control processing under the diagnostic control device.

, the storage device is for storing diagnostic programs executed on the diagnostic controller and service processor, and diagnostic data for the data processing subsystem.

In the above configuration, the present invention allows the diagnostic control device to access the main storage device via the service processor, and performs maintenance and diagnostic control processing for the data processing subsystem according to predetermined assignments by the diagnostic control device and the service processor. It is configured so that it can be done.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a data processing system according to the present invention. In FIG. 1, 1 is a data processing subsystem, 10 is a main storage device, 11 is a main storage control device, 12 is a central processing unit, 13 is an input/output control device,
20 is a storage device, 21 is a diagnostic control device, 30 is a second service processor, 31 is a CRT/keyboard device, 32
is a disk device, s3 is a printer device, 40 and 4n are each a channel device, 60 is a disk control device, 51 is a magnetic tape control device, 52.63 is a disk device, and 54.66 is a magnetic tape device.

In FIG. 1, a data processing subsystem 1 is comprised of a main storage device 10, a main storage control device 11, a central processing unit 12, and an input/output control device 13. The central processing unit 12 accesses and executes programs stored in the main memory 10 via the main memory side control unit 11. The input/output control device 13 controls data transfer between the main storage device 10 and the disk control device sO or the magnetic tape control device 51 based on input/output instructions or startup instructions from the central processing unit 12.

The diagnostic control device 21 and service processor serve as a means of performing maintenance diagnosis on the data processing subsystem! has 0. The diagnostic control device 21 operates according to the program stored in the storage device 20, and the data processing subsystem 1,
Disk devices 52, 58, and magnetic tape devices 64
．． 55 maintenance diagnosis control is performed. The diagnostic control device 21 is connected via signal lines 103 to 106 to the main storage device 10, the main storage control device 11, the central processing unit 12, and the input/output control device 13 that constitute the data processing subsystem 1. It performs diagnostic control by controlling the scan path of each device, and also connects the main memory control device 1 from the signal line 104.
The main storage device 10 can be accessed via the main storage device 1.

The second service processor sO also operates independently of the data processing subsystem 1 and the diagnostic control device 21, and performs maintenance and diagnostic control. 3S
It has input/output devices such as. The first service processor 21 and the second service processor 30 are connected to the signal line 10
8.

Access to the input/output devices 52 to 55 connected to the input/output control device 13 is controlled by the central processing unit 12 and the diagnostic control device 21 inside the data processing subsystem that characterizes the present invention.

Next, such control operation will be explained.

The memory area of the main storage device 10 is divided into a diagnostic software area 600 used by the diagnostic control device 21 and a software area 610 used by software running on the data processing subsystem 1, as shown in FIG. managed.

During access to input/output devices from the operating system on data processing subsystem 1, software area 6
When the channel program 61 is set in the main memory controller 10 and the input/output activation command is executed, the central processing unit 12
1, the input/output control device 1S is notified of the input/output activation. In response to this notification, the input/output control device 1s reads the channel program 61 from the main storage device 10 and starts input/output operations.

When starting input/output operations from the diagnostic control device 21,
Channel program 60 in diagnostic software area 600
The diagnosis control device 21 notifies the input/output control device 13 of input/output activation.

In response to this notification, the input/output control device 13 reads the channel program 60 and starts the input/output operation in the same manner as described above. The channel program by the diagnostic controller 21 uses a buffer inside the diagnostic software area 600 to buffer input/output transfer data.

The input/output control device 15 activates input/output operations from either the central processing unit 12 or the diagnostic control device 21, and manages the identifiers for each input/output device. When the input/output operation ends and an input/output interrupt occurs, the input/output control device 13 determines whether the interrupt occurs to the central processing unit 12 or the diagnostic control device 21 based on the above identifier, and responds accordingly. Notify the device of input/output interrupts. By such notification, the central processing unit 1
2, or the diagnostic control device 21Fi notifies each software of the above state.

As described above, the central processing unit 12 and the diagnostic control unit 2
1 controls the input/output devices 52 to 55 under the data processing subsystem 1 via their respective memory areas.

Next, the operation when diagnosing an input/output device from the diagnostic control device 21 will be explained.

When a diagnosis of the disk device 52 is instructed by an input from the CRT/keyboard device 31 under the service processor 30, the service processor 30 notifies the diagnosis control device 21 of the instruction. Diagnostic control device 21
checks whether the disk device S2 is under the software control of the data processing subsystem 1 from the system configuration management information, and if it is under the control, suppresses execution of diagnosis. If it is not under the control and is separated from the software of the data processing subsystem 1, the disk device 52
Execution of the diagnostic program for this starts on the diagnostic control device 21. Disk device 6 using this diagnostic program
I/O instructions for 2 are executed using the diagnostic software area 600 shown above.

When the execution of the input/output command and the confirmation diagnosis of the input/output operation results by the diagnostic program are completed, the diagnostic control device 21 notifies the service processor 30 of the above results and displays them on the CRT/keyboard device 31.

Next, startup of the data processing system will be explained.

When the service processor 30 notifies the diagnostic control device 21 of an instruction to start up the system, the diagnostic control device 21
performs initial settings by initializing each device inside the data processing subsystem 1 and loading initial firmware. Next, the 1 maintenance diagnosis device 21 executes an initialization command for each input/output device by accessing the input/output device, performs initial settings, reads the specified put load device, and executes the specified channel program. It is created on the main storage device 1o and issues input/output commands to instruct boot loading.

When such processing is completed, the diagnostic control device 21 starts up the central processing unit 12 to start up the data processing subsystem 1.

In the embodiment shown in FIG. 1, the case where each component of the data processing subsystem 1 such as the central processing unit 12 is one unit has been described as an example, but the same applies to a multiprocessor system in which each unit has two or more units. can be realized.

(Effects of the Invention) As explained above, the present invention enables the input/output device of a data processing system to be accessed from a processor dedicated to maintenance and diagnosis, and is independent of the system state before startup or the software operating state of the system main body. By performing the initial settings of the input/output devices and controlling the diagnostic processing in parallel, it is easy to initialize the input/output devices prior to system startup. This has the effect that it is possible to effectively resolve the contradiction between executing and loading a file.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of a data processing system according to the present invention. FIG. 2 is an explanatory diagram showing an example of the contents of a memory area in the main storage device of FIG. 1. 1...Data processing subsystem 10...Main storage device 11...Main memory control device IQ, -, Excavated hn phantasmagoria 13...ΦI/O control device 20...Storage device 21.30. ...Service processor al-...CRT/keyboard device 32...Disk device 33...Printer device 40.4n...Channel device 50...Disk control device 51...Magnetic tape control device 52.5 ! ”Purn disk device

Claims (1)

[Claims] Each of the main storage devices includes at least one main storage device, a main storage control device, a central processing unit, and an input/output control device that performs input/output transfer control between the input/output device and the main storage device, and performs data processing. a data processing subsystem for executing the data processing, and a data processing subsystem connected to each of the devices constituting the data processing subsystem via a diagnostic interface, capable of accessing the main storage device, and of the input/output control device. a diagnostic control device capable of starting/terminating input/output operations and for managing maintenance diagnostic control processing; and a diagnostic control device that is connected to the diagnostic control device and performs part of the maintenance diagnostic control processing under the diagnostic control device. a storage device for storing a diagnostic program executed on the diagnostic control device and the service processor, and diagnostic data of the data processing subsystem; the main storage device can be accessed by the diagnostic control device, and the maintenance diagnostic control processing of the data processing subsystem can be processed according to predetermined assignments by the diagnostic control device and the service processor. A data processing system characterized by being configured as follows.