JPS6149260A - Channel processing device - Google Patents

Abstract

PURPOSE:To minimize a constraint on control of a channel processing device by a service processor by generating an interruption request signal to the channel processing device in accordance with a special command which a service processor issues. CONSTITUTION:An interruption control circuit 23 to generate interruption is located at a processor 10, and program execution of the processor 10 is interrupted by one of various kinds of interruption request signals 24 generated with an event detected at other part of a channel processing device 3 as a factor. A command processing circuit 27 outputs the interruption request signal on a signal line 25 by receiving a special command. When the processor 10 detects that interruption occurs and it is a request on the signal line 25, reads the contents of a designating information register 29 and preserves at a suitable register or memory, etc. The processor 10, immediately after that, returns to interrupted processing and after the processing, the processing such as a test is started in accordance with indicated information.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a channel processing device for an information processing system,
In particular, the present invention relates to a control method for receiving various commands issued by a service processor to a channel processing device.

In medium-sized or larger information processing systems, a service processor is often provided to control the monitoring, testing, initial setting, etc. of various component devices.

[Conventional technology]

FIG. 3 is a diagram showing an example of the configuration of an information processing system having a service processor. In this example, two central processing units 1, a main storage device 2, and a channel processing device 3 are connected to a control device 4, and the control device 4 controls mutual communication between these devices, so that one piece of information can be stored. The processing system is: 1) constructed;

The service processor 5 is provided to initialize, reset, record information such as failures, and monitor the status of each of the above-mentioned devices in the system, and is connected to the control device 4 to control each device through a common interface. In addition to enabling communication with the devices, a dedicated ink face is provided for each target device, as conceptually shown by the broken line, so that the service processor 5 can directly control each device 1, 2, 3, etc. It is possible.

FIG. 4 shows an example of a configuration of a dedicated interface in such a channel processing device 3. .

The processor 10 is a processor that executes the overall control logic of the channel processing device 3, and is connected to the signal lines 1). 12, it is connected to the control device 4, mainly exchanges control information with the central processing device 1, and executes specified input/output processing.

The service processor 5 is connected to the command processing circuit 17 of the channel processing device 3 by signal lines 15, 16.

When the command processing circuit 17 receives command information from the service processor 5, it outputs a signal to a required signal line of a group of signal wires 18 connected to the internal registers, etc. of the processor 10, and forcibly controls the internal registers, etc. Setting or reading to the signal line 19 is performed.

The command processing circuit 17 relays the signal read to the signal line 19 to the service processor 5.

By using such a dedicated ink face, the service processor 5 can directly read the contents of the internal registers of the other device, for example, the central processing unit 1, or forcefully set a required value in the internal registers. It is configured to enable detailed testing of the device.

[Problem that the invention seeks to solve]

However, according to such a direct control method, while this control is being performed, the original glue operation is generally interrupted in the partner device. For this reason, for devices such as the channel processing device 3, which may cause problems such as data loss if processing is not performed in real-time synchronization with operations such as data transfer of input/output devices, service There are very limited cases where direct control from the processor 5 can be used.

In addition, in the case of direct control, it is naturally necessary to recognize all the internal configurations of the channel processing device 5, etc., and configure the control from the service processor 3, which reduces the complexity of the device. The difficulty in configuring the control functions of the service processor 3 is gradually increasing.

Under such circumstances, there has been a problem in that there is no appropriate control method from the conventional service processor, particularly for devices with strong real-time characteristics such as the channel processing device 3.

[Means for solving problems]

The above problem is that when a command signal is transferred from a service processor to a channel processing device, there is a means for generating an interrupt request signal to the channel processing device according to a specific command issued by the service processor, and a means for generating an interrupt request signal to the channel processing device. The problem is solved by the channel processing device of the invention of Mokushi 1, which is activated by receiving the service processor and includes means for receiving command information from the service processor.

In such a configuration, if the channel processing device is in a predetermined state in which it does not accept any interrupt request signals, the signal generated by the above-mentioned specific command changes the state to a state in which it can accept interrupt signals. By means of the channel processing device of the invention of Woodbrush 2, which is configured to be modified, the problems of the prior art can be more satisfactorily solved.

[Effect]

That is, as an interface between the service processor 5 and the channel processing device 3, the interrupt mechanism of the channel processing device 3 is used to generate an interrupt in the channel processing device 3 in response to a specific command issued by the service processor 5. .

Also, when this interrupt is accepted, the channel processing device 3
receives command information from the service processor 5 through another interface, decodes this command, and executes processing such as a predetermined test. Make it.

Therefore, the channel processing device 3 only needs to accept control from the service processor 5 in the same way as the occurrence of a normal non-identical interrupt, and execute the command at a time when it does not interfere with the original processing. In such cases, this interrupt can be suppressed for a certain period of time by using the usual method of masking the interrupt mechanism.

As the service processor 5, the channel processing device 3
It is possible to issue a command such as a test to the channel processing device 3 regardless of whether the channel processing device 3 is in the process of data transfer processing, and it is necessary to configure the control within the channel processing device 3 based on the command on the service processor 5 side. The burden can be significantly reduced.

According to the second invention, regardless of whether the channel processing device 3 is in a so-called running state or in a stop state and cannot accept all interrupts, if the above-mentioned specific command is sent, interrupt signals can always be accepted. Therefore, the need to identify the state of the channel processing device 3 in command issuing by the service processor 5 is further reduced.

〔Example〕

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

The processor 10 has an interrupt controller 1 for generating interrupts.
)1) There is a circuit 23, which inputs various interrupt request signals 24 generated due to events detected in other parts of the channel processing device 3 or events detected in the processor 10, etc. One of the request signals is selected according to the priority order, interrupting the program execution currently in progress by the processor 10 and activating a predetermined interrupt processing program, that is, a so-called interrupt is generated.

According to the present invention, an interrupt request signal line 25 from command processing circuit 27 is provided.

When the command processing circuit 27 receives a specific command,
Turn on the signal line 26. The signal line 26 constitutes the interrupt request signal of the signal line 25 by ANDing with the signal line 21.

The signal 'fLFA21 is an output signal of the mask register 28 and is always on. When it is necessary to suppress the occurrence of an interrupt due to a v1 interrupt request from the command processing circuit 27, it is controlled by the program executed by the processor 10. It is assumed that it has been reset for the necessary period.

The interrupt control circuit 23 transmits the request signal on the signal line 25 to the signal line 2.
, 4, and when selected in a predetermined priority order, an interrupt is generated to the processor 10.

When the command processing circuit 27 receives command information from the service processor 5 following the specific command, it sets this in the command information register 29 and returns a processing end signal to the service processor 5.

When the processor 10 detects that an interrupt occurs and that it is a request signal on the signal line 25, that is, an interrupt request from the service processor 5, it reads the contents of the command information register 29 and, if necessary, stores the contents in an appropriate register or memory. to hold.

Immediately thereafter, or after returning to the process interrupted by the interrupt and finishing that process, the processor 10 starts processing such as a test in accordance with the above command information.

FIG. 2 is a block diagram showing the configuration of an embodiment of the invention of the wood brush 2. As shown in FIG.

Latch 30 is located within processor 10 and is a latch that indicates whether the processor is in a so-called run state or a stop state.

As is well known, this kind of launch is turned on in a run state and turned off in a stop state, so that in the stop state, the output signal line 31 prevents all interrupt request signals from being input to the interrupt control circuit 23. It is composed of

According to the present invention, when receiving the above-mentioned specific command from the service processor 5 and generating an interrupt request to the processor 10, in the case of a stop state, the AND gate 32 is activated by the signal line 26 of the request signal. After that, signal 33
A signal is generated to set latch 30 to the run state.

Therefore, even if it is in a stop state, it is automatically changed to a run state, and the request signal on the signal line 26 is transmitted to the interrupt control circuit 23.
can be input to generate an interrupt as described above.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, there are fewer restrictions on the control of the channel processing device by the service processor, so there is a significant industrial effect of improving the imaging performance and reliability of the information processing system. be.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an embodiment of the invention of wood brush 1, Fig. 2 is a block diagram showing the structure of an embodiment of the invention of wood brush 2, Fig. 3 is a block diagram of an information processing system, FIG. 4 is a block diagram showing an example of the configuration of a conventional channel processing device. In the figure, 1 is a central processing unit, 2 is a main storage device, 3 is a channel processing device, 4 is a control device, 5 is a service processor, 10 is a processor, 17.27 is a command processing circuit, 23 is an interrupt control circuit, 29 is the command information register, 3
0 indicates a latch. Perforation 1 Diagram 3 Diagram

Claims (3)

[Claims] (1) When transferring a command signal from a service processor to a channel processing device, means for generating an interrupt request signal to the channel processing device according to a specific command issued by the service processor, and receiving the interrupt request. A channel processing device characterized in that the channel processing device is activated by the service processor and has means for receiving command information from the service processor. (2) The channel processing device according to claim (1), wherein the interrupt request signal generating means includes masking means for suppressing generation of the signal. (3) means for generating an interrupt request signal to the channel processing device according to a specific command issued by the service processor when transferring a command signal from the service processor to the channel processing device, and receiving the interrupt request signal; and has means for receiving command information from the service processor, and when the channel processing device is in a predetermined state in which it does not accept any interrupt request signals, the interrupt request signal is generated by the specific command. 1. A channel processing device, characterized in that the channel processing device is configured to change the state to a state in which an interrupt signal can be accepted in response to a signal.