JPH0229844A - Interruption control system for input/output device - Google Patents

Abstract

PURPOSE:To prevent the number of I/O devices to be connected to a CPU from being restricted by the number of interruption signal lines in an I/O bus of an electronic computer system by controlling plural I/O devices through one interruption signal line at the time of using the plural I/O devices. CONSTITUTION:An I/O device registering means 4 checks the existence of I/O devices 3a to 3n to use a specific interruption signal line 2' in the I/O bus 2 and registers information relating to I/O device control means 7a to 7n in an I/O device information registering means 5. When an interruption signal from any one of the devices 3a to 3n is generated in the signal line 2', an interruption control starting means 6 successively checks whether an interruption signal is generated or not from the I/O devices 3a to 3n, and at the time of detecting the I/O device generating the interruption, transfers processing to interruption control based upon the I/O control means concerned out of the I/O device control means 7a to 7n. Thus, the interruption control of the plural I/O devices can be executed by one interruption signal line 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interrupt control method when a plurality of input/output devices are used in an electronic computer system.

[Conventional technology]

Conventionally, interrupt control of input/output devices in computer systems uses independent interrupt signal lines on the input/output bus for each input/output device, and interrupts are sent when an interrupt occurs, as shown in Figure 4. By receiving information on the interrupt signal line where an interrupt is detected from the control device, the interrupt from each input/output device is identified as an independent interrupt, and interrupt control of the corresponding input/output device control means is activated. It was a method.

[Problem to be solved by the invention]

In the conventional interrupt control method described above, different interrupt signal lines are used for each input/output device. There is a problem in that it is limited by the number of integrated signal lines.

[Means to solve the problem]

According to the present invention, in an electronic computer system including a central processing unit, an input/output device having an interrupt generation function, and an input/output bus connecting the central processing unit and the input/output device, the input/output An input/output device control means for controlling interrupts from the device, a registration means for generating input/output device information specifying interrupt signal line information of the input/output device, and an interrupt signal from the input/output device. According to the present invention, there is provided an interrupt control method for an input/output device in a computer system, which is characterized in that it has a means for activating interrupt control to perform interrupt control, and is capable of controlling input/output interrupts using the same interrupt signal.

〔Example〕

Next, the present invention will be described in more detail with reference to the drawings showing one embodiment of the present invention.

Referring to FIG. 1, one embodiment of the present invention includes a central processing unit 1, an input/output bus 2, and an interrupt signal line 2 in the input/output bus.
', and input/output devices 3a, 3b, . . . 3n.

The central processing unit 1 includes an input/output device registration means 4 that registers information regarding the input/output devices 3a to 3n, input/output device information regarding the input/output devices that use the same interrupt signal line, and an input/output device registering unit 4 that registers information regarding the input/output devices 3a to 3n. interrupt control activation means 6 that identifies the input/output device that has generated the error and activates interrupt control for the corresponding input/output device; and input/output device control means 7 that controls the input/output devices 3a to 3n.
a +7b...7n.

The input/output device registration means 4 checks the presence or absence of input/output devices 3a to 3n that use a specific interrupt signal line 2' in the input/output bus 2 when initializing the computer system, and Information on the input/output devices 3a to 3n and information regarding the input/output device control means 7a to 7n are registered in the input/output device registration means 5. When the registration of the input/output devices 3a to 3n is completed and an interrupt signal from any of the input/output devices W3a to 3n is generated on a specific interrupt signal line 2' of the input/output bus 2, the central processing 0 when the device activates the interrupt control activation means 6
The interrupt control activation means sequentially confirms whether or not an interrupt has occurred for the input/output devices 3a to 3n registered in the input/output device information 5, and discovers the input/output device that has generated the interrupt. At this point, the process is shifted to the split X control of the corresponding input/output device among the input/output control means 7a to 7n.

By performing such control, as shown in FIG. 2, it is possible to perform interrupt control of a plurality of input/output devices using the same interrupt signal line 2'.

A more concrete embodiment is shown in FIG. 3. In the embodiment shown in FIG. A case is shown in which the control adapter 3c'' is connected to the same interrupt signal line 2'.

When initializing the computer system, the disk control adapter registration process 4', which is an input/output device registration means, determines that the disk control adapter connected to the system is the SMD disk control adapter 3a'5T-506 disk control adapter 3b'. , ESDi disk control adapter 3c'
The connection information for the three types of adapters mentioned above is registered in the disk control adapter information 5' which is the input/output device information. When the system has finished initializing and an input/output request to one of the disks occurs,
SMD disk control processing 7a which is input/output device control means
', 5T-406 disk control processing 7b', ESD
Among the i-disk control processes 7c', the activation control process of the corresponding disk control process is activated. In the startup control process,
An input/output command is activated for the corresponding disk control adapter, and the state is set to wait for an interrupt from the disk control adapter. When the disk operation ends on the disk control adapter side,
0 interrupt generation adapter identification processing that generates an interrupt to the central processing unit, 1, and activates the interrupt generation adapter identification processing 6', which is an interrupt control activation means, on the central processing unit side when the interrupt occurs. 6' refers to the adapter connection information in the disk control adapter information 5', identifies from which of the connected disk control adapters an interrupt has occurred, and executes the interrupt control process for the corresponding disk control process. Start
Receives disk input/output completion information from the applicable adapter and ends disk input/output control.

As described above, in FIG. 3, interrupt control can be performed by connecting a plurality of disk control adapters to the same interrupt signal line 2'.

〔Effect of the invention〕

As explained above, according to the present invention, when a plurality of input/output devices are used in an electronic computer system, by making it possible to control the plurality of input/output devices with - interrupt signal lines, a central This has the advantage that the number of input/output devices connectable to the processing device is not limited by the number of interrupt signal lines in the input/output bus in the computer system.

Information, 6... Interrupt control activation means, 7a-7n... Input/output device control means, 8... Interrupt control device.

Claims (1)

[Claims] In a computer system comprising a central processing unit, an input/output device having an interrupt generation function, and an input/output bus connecting the central processing unit and the input/output device, an interrupt from the input/output device is processed. an input/output device control means for controlling;
comprising a registration means for generating input/output device information defining interrupt signal line information of the input/output device, and means for activating corresponding interrupt control by an interrupt signal from the input/output device;
An interrupt control method for an input/output device in a computer system, characterized in that input/output interrupts can be controlled by the same interrupt signal.