JPH04363742A - Data processor - Google Patents

Abstract

PURPOSE:To enhance the reliability of a data processor by improving the processing capability of a bus connecting part, and the transferring processing capability of a shared bus, and detecting the abnormality of a monitor control part. CONSTITUTION:In a bus connecting part 40, at the time of identifying a monitoring command from a monitor controller 20, a microprocessor 42 confirms the presence of two inputting and outputting parts connected with an extended bus 80 from a flag 45, and transmits the monitoring command to entire inputting and outputting parts 50 and 60 on the extended bus 80. When the monitoring command is not issued to the bus connection part 40 within a certain fixed time by the monitor control part 20, a time out is operated by a monitor control part monitoring timer 47. Thus, the abnormality of the monitor control part 20 can be detected and communicated to a control processing unit 10 by the microprocessor 42.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus having a function of monitoring a plurality of input/output sections connected to an extension bus using a monitoring control section.

0002

2. Description of the Related Art Conventionally, in this type of data processing device, an input/output section and a supervisory control section are connected to a central processing unit (CPU) via a common bus, and a plurality of input/output sections are connected via an extension bus. Multiple input/output units are connected via.

[0003] In this conventional data processing device, the supervisory control unit issues a supervisory command to each input/output unit on the expansion bus at regular intervals. When the bus connection section receives this command, it issues the command as it is to the input/output section on the expansion bus, and when it receives a response to the monitoring command sent from each of these input/output sections, it directly issues it to the monitoring control section. was being sent to. here,
The monitoring commands issued by the monitoring control unit were issued individually to each input/output unit.

0004

[Problems to be Solved by the Invention] As mentioned above, in the conventional data processing device, the monitoring command issued from the monitoring control unit to the input/output unit connected to the expansion bus is Since they were issued individually, there was a problem in that when the input/output sections on the expansion bus were used multiplexed, the processing capacity of the bus connection section and the transfer processing capacity of the common bus were reduced. Furthermore, since there was no means for detecting an abnormality in the supervisory control unit itself, there was a problem in that when an abnormality occurred, it could not be detected, reducing the reliability of the entire system.

[0005] The present invention has been made in view of the above problem, and its purpose is to increase the processing capacity of the bus connection unit and the transfer processing capacity of the common bus when input/output units on the expansion bus are used in multiple ways. It is an object of the present invention to provide a data processing device which can improve the reliability of the system as a whole, can detect abnormalities in the monitoring control section itself, and has excellent reliability of the entire system.

[0006]

[Means for Solving the Problems] A data processing device of the present invention includes a central processing unit connected to a common bus, a plurality of input/output units connected to an extension bus, and a data processing device connected to the common bus, a monitoring control unit that issues a monitoring command for monitoring the expansion bus and the input/output unit, and notifies the central processing unit when an abnormality is detected; and a bus connection section that connects between the two and transmits monitoring commands from the monitoring control section to all the input/output sections via the expansion bus.

According to the data processing device configured as described above, when the supervisory control unit issues a monitoring command, the bus connection unit issues the monitoring command to all input/output units on the expansion bus. The throughput and transfer throughput of the common bus are improved.

Furthermore, in the data processing device of the present invention, the bus connection section monitors the interval at which the monitoring control section issues the monitoring command, and when the monitoring command is not issued within a certain interval, the bus connection section monitors the interval at which the monitoring control section issues the monitoring command. Notifies the central processing unit of an abnormality in the monitoring control unit.

Specifically, the bus connection section includes a first timer that monitors the issuance of a monitoring command by the supervisory control section at fixed time intervals, and a first timer that monitors the response time of the input/output section to the monitoring command. When a second timer receives a monitoring command from the monitoring control unit, it issues a monitoring command to all input/output devices on the expansion bus, and when it receives a response from each input/output unit, it issues a monitoring command to all input/output devices on the expansion bus. Notify the control unit to that effect, and if an abnormality is detected upon receiving the output of the first timer, notify the central processing unit to that effect, and upon receiving the output of the second timer, A microprocessor that notifies the supervisory control unit when an abnormality is detected in the output unit, and a microprocessor that stores the number of input/output units connected to the extension bus, and stores each input/output unit on the extension bus. The flag is set when a monitoring command is sent in response to the above response, and is reset when the response is received.

According to this configuration, the bus connection section monitors the interval at which the monitoring control section issues the monitoring command, and if no monitoring command is issued within a certain time interval, the
The central processing unit is notified of the abnormality in the monitoring control unit. Therefore, abnormalities in the supervisory control section can be detected, and the reliability of the entire system can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in more detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a data processing apparatus according to an embodiment of the present invention.

A supervisory control section 20 and an input/output section 30 are connected to the central processing unit (CPU) 10 via a common bus 70, and an additional bus 80 is further connected via a bus connection section 40. A plurality of, for example two, input/output units 50 and 60 are connected to the expansion bus 80.

The monitoring control unit 20 issues commands for monitoring all the input/output units 50 and 60 via the common bus 70 and the expansion bus 80, and when an abnormality is detected, the central processing unit 10 will be notified to that effect.

The bus connection unit 40 connects the common bus 70 and the expansion bus 80, and includes a register 41 that sends and receives data to and from the common bus 70, and a microprocessor 42 that receives and analyzes data from the register 41. and,
An internal memory 43 that receives and stores data from the register 41 via the microprocessor 42, and a supervisory controller monitoring timer 4 that monitors the supervisory controller 20 at fixed time intervals.
7, an input/output unit monitoring timer 46 that monitors the response time to the monitoring command of the input/output units 50 and 60, and a register 44 that stores data to be sent to the expansion bus 80.
and a flag 45 that is set when a monitoring command is sent to each input/output unit 50, 60 on the expansion bus 80, and reset when a response from the input/output unit 50, 60 to this monitoring command is received. configured.

Next, the operation of the data processing apparatus of this embodiment will be explained.

First, when the entire system is started up, the central processing unit 10 sends a monitoring command to the monitoring control section 20. Upon receiving this command, the supervisory control unit 20 controls each input/output unit 50,
60, a monitoring start command is issued to the bus connection unit 40 via the common bus 70. At the same time, the number of input/output sections connected to the expansion bus 80 (two in this embodiment) is notified to the bus connection section 40.

In the bus connection section 40, data sent from the common bus 70 is stored in a register 41. When the data is stored in the register 41, the microprocessor 42 is notified that the data has been received. Upon receiving this notification, the microprocessor 42 performs control as shown in FIG.

First, the microprocessor 42 determines whether there is received data (step S1), and if there is received data (Y), the received data stored in the register 41 is stored in the internal memory 43 (step S1). At the same time as step S2), the received data is analyzed (step S3). Subsequently, the microprocessor 42 identifies the monitoring start command from the supervisory controller 20 (step S4; Y), starts the supervisory controller monitor timer 47 (step S5), and starts monitoring the supervisory controller 20. Furthermore, the microprocessor 42 confirms that there are two input/output devices connected to the expansion bus 80, and stores this fact in the flag 45 (step S6). Note that if the monitoring start command is not identified in step S4 (N), the process returns to step S1.

After issuing the above-mentioned monitoring start command, the monitoring control unit 20 connects the common bus 70 at regular intervals.
A monitoring command is issued to the input/output unit 30 and bus connection unit 40 above.

When a monitoring command is issued from the monitoring control unit, data is stored in the register 41 in the bus connection unit 40 in the same manner as described above, and the microprocessor 42 is notified that the data has been received. As a result, the microprocessor 42 performs control as shown in FIGS. 3 and 4.

That is, the microprocessor 42 determines whether there is received data (step S1), and if there is received data (Y), the received data stored in the register 41 is stored in the internal memory 43 (step S1). At the same time as step S2), the received data is analyzed (step S3). Then, when the monitoring command from the monitoring control device 20 is identified (step S4; Y), the flag 45 indicates that the extension bus 80 is
It is confirmed that there are two input/output units connected to the expansion bus 80 (step S5), a monitoring command is set in the register 44 (step S6), and the input/output unit 50 on the expansion bus 80,
A monitoring command is sent to each of the 60 devices (step S7).

When all the input/output units 50 and 60 connected to the expansion bus 80 have finished sending the monitoring commands in this way, the microprocessor 42 sets the flag 45
The bits corresponding to the input/output section 50 and the input/output section 60 are respectively set (step S8). The input/output section monitoring timer 46 is also set (step S9) to monitor the response time of the monitoring command. Furthermore, the value of the supervisory control unit supervisory timer 47 is reset (step S10).

After that, the microprocessor 42 receives a response from the input/output section 50 and the input/output section 60 indicating that the monitoring command has been successfully completed (steps S11, 12; Y).
) and the corresponding bits of the flag 45 are reset (step S13), and the monitoring control unit 20 is notified that the monitoring command including the bus connection unit 40 has completed normally (step S14).

On the other hand, the input/output units 50 and 6 on the expansion bus 80
When any one of the responses of 0 ends in a timeout or an abnormal state (steps S11, 12; N), the microprocessor 42 notifies the supervisory control unit 20 to that effect (step S15). The monitoring control unit 20 that received this notification
notifies the central processing unit 10 of this fact. When the central processing unit 10 receives the notification, it temporarily suspends data processing.

Further, when the supervisory controller 20 does not issue a supervisory command to the bus connection unit 40 within a certain period of time (step S4; N), the supervisory controller supervisory timer 47 times out, and the microprocessor 42 detects that there is an abnormality in the supervisory control unit, and the central processing unit 1
0 (step S16). When the central processing unit 10 receives the notification, it temporarily suspends data processing in the same manner as described above.

[0027]

As described above, according to the data processing apparatus according to claim 1, the monitoring command issued from the monitoring control section is transmitted to all input/output sections on the expansion bus at the bus connection section. As a result, the performance processing capacity of the bus connection section and the transfer processing capacity of the common bus can be improved.

Further, according to the data processing apparatus according to claims 2 and 3, the bus connection unit monitors the interval at which the monitoring control unit issues the monitoring command, and the monitoring command is not issued within a certain interval. In this case, since the central processing unit is notified of an abnormality in the supervisory control unit, an abnormality in the supervisory control unit can be detected, and the reliability of the entire system can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a data processing device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of a bus connection section in the data processing device of FIG. 1;

FIG. 3 is a flow chart for explaining the operation of the bus connection section.

FIG. 4 is a flow chart for explaining the operation of the bus connection section.

[Explanation of symbols]

10 Central processing unit 20 Monitoring control section 30, 50, 60 Input/output section 40 Bus connection part 41, 44 register 42 Microprocessor 43 Internal memory 45 Flag 46 Input/output section monitoring timer 47 Monitoring control unit monitoring timer 70 Common bus 80 Additional bus

Claims (3)

[Claims] 1. A central processing unit connected to a common bus, a plurality of input/output units connected to an extension bus, and a central processing unit connected to the common bus and for monitoring the extension bus and the input/output units. A monitoring control unit that issues monitoring commands and notifies the central processing unit when an abnormality is detected, and the common bus and the expansion bus are connected, and the monitoring control unit issues monitoring commands to the central processing unit. 1. A data processing device comprising: a bus connection section for transmitting commands for use to all input/output sections via the expansion bus. 2. The bus connection unit monitors the interval at which the supervisory control unit issues a supervisory command, and when the supervisory command is not issued within a certain interval, the bus connection unit instructs the central processing unit to issue a supervisory command. The data processing device according to claim 1, wherein the data processing device notifies the abnormality. 3. The bus connection unit includes a first timer that monitors the issuance of the monitoring command by the monitoring control unit at regular time intervals, and a first timer that monitors the response time of the input/output unit to the monitoring command. When the timer No. 2 and the monitoring command are received from the monitoring control unit, the monitoring command is issued to all input/output devices on the expansion bus, and when a response from each input/output unit is received, the monitoring control unit issues the monitoring command to the monitoring control unit. If an abnormality is detected upon receiving the output of the first timer, the central processing unit is notified of this, and upon receiving the output of the second timer, the input/output unit A microprocessor that notifies the supervisory control unit when an abnormality is detected, and a microprocessor that stores the number of input/output units connected to the extension bus and corresponds to each input/output unit on the extension bus. 3. The data processing apparatus according to claim 2, further comprising a flag that is set when the monitoring command is sent and reset when the response is received.