JPS59109948A - Information processing device - Google Patents

Abstract

PURPOSE:To avoid a system halt caused on purpose or due to a misoperation by constituting so that a power source on/off switch of a computer body and an IPL switch are controlled by an operating system. CONSTITUTION:When a power source on/off switch 2 is depressed in the off- direction, a power-off signal is generated to a computer body 1, a state of the computer body 1 is safe-stored, and an interruption is inhibited. Subsequently, the contents of a system control status register 11 are retrieved, and a P flag is checked. When the P flag is on, a request of power-off is disregarded. When the P flag is off, the power-off is executed. Subsequently, when an IPL switch 3 is depressed, an IPL signal is outputted, a state of the computer body 1 is safe-stored, and an interruption is inhibited. Next, the contents of the register 11 are retrieved, and an IPL flag is checked. When the IPL flag is on, an IPL request is disregarded, and when the IPL flag is off, a start of input/output is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention provides a power supply with a power supply of 0. The present invention relates to an information processing device M in which an N10FF switch or an IPL switch is linked to a system.

[Technical status of the invention and its problems]

Usually, in an information processing device, the power supply is 0N10FF.
A switch and an IPL switch for setting the initial state are provided on the main body (SEP), and when the SEP is turned on, the IP
The system is activated by pressing the L switch.

However, the operating system that manages these switches and the system is designed to be intrusive, so if these switches are pressed intentionally or accidentally, the system will be forcibly interrupted and business will stop. I end up.

In systems that sometimes aim for distributed processing or unmanned operation (automated operation), there is no need to install or arrange a system console or a mask operator. Therefore, recently there have been many accidents in which computer systems are intentionally interrupted.

From the viewpoint of user organization management and machine management, it is necessary to incorporate the operation of these switches into the system.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned needs, and by configuring the computer main unit's power ON'10FF switch and IPL switch to be controlled by the operating system, these switches can be controlled while the operating system is running. The purpose of this invention is to provide an information processing device that is controlled by software and avoids stem interruptions caused by intentional or erroneous operations.

[Summary of the invention]

Is this invention electric? 1ON10FF Communicate the call signals of the switch and IPL switch with the computer system (hardware/software) to perform processing based on the contents of the system control status register and the contents of the switch, or ignore it and restart the processing. The structure is unique. Therefore, a circuit that receives the call signal from the switch and transmits it to the CPU as an interrupt, and a system control status register that includes a flag that is set/reset by a privileged command (SET SCP register command) are built into the device. There is a need.

This allows systems oriented towards fraction processing and '1i
l (An information processing device can be suitably provided as an incoming system.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail using the drawings.

The figure is a block diagram conceptually showing an embodiment of the device of the present invention. In the figure, L is the computer main body (SCP). 5
The CP7 performs face calculation control or various controls within the device according to the program stored in the main memory (not shown).The flowchart (12) shown in the block
Power supply control routine (13; IPL control routine) shows only the control portions related to the present invention.
2 is city, source 0N10FF switch, 3 is IPL
It is assumed that the switch is installed on the operation panel on the front of the 5CP7. (The console unit may be connected via the system bus shown in the figure.) The above-mentioned PL switch 3 is a switch that reads the program on the medium from the floppy disk 4 and passes control to the IPL routine. . Note that 5 is a power supply control device.

The 5CP7 has a built-in system control status register 11, and at least the following two flags are assigned to this system control status register 11. One is the P flag, and when this flag is set, the electric/I! When a power OFF signal is accepted via the iON/○F'F switch 2, the signal is ignored. When this P flag is reset, a power OFF signal is sent to the illumination control device 5 as before. The remaining one is the IPL flag. When this flag is set and an IPL signal is accepted via the IPL switch 3, that signal is ignored.

When this signal is reset, IPL continues as before.
An action is taken.

In addition, in the initial state when the power Y19 is ON, the -F periodic graph is reset. Flag setting/resetting to the system control status register 11 is performed by a privileged instruction (J-, I, 5ETSCP instruction). This system control status register 11 is controlled by software.

The operation of the present invention will be explained in detail below. Flag set to system control status register 11/
Let's start with the explanation of reset operation 1. In this case, SET
Prepare an SCP register instruction as a hunting right instruction. When this command is issued, the contents of the relative operand data are set in the system control status register 11.

This instruction sets/resets the P flag or IPL flag.

Now, when the power supply ○N10 FF switch 2 is pressed in the direction indicating OFF, a power OFF signal is output to 5cpz, and the control shifts to sCPL (5CPZ).
When it receives control, it safely stores the state of 5CPL and ignores all interrupts. - Search the contents of the second system control register 1) and check the P flag. Here, when the P flag is ON, the request for power QFF is ignored, the safe stored contents are returned, and the interrupt is canceled while control is transferred to the interrupted address. When the P flag is OFF, a request to turn off the power is sent to the power supply control mochi making 5, and the power is turned off.

It is assumed that the IP L switch 3 is pressed at the next G.

When the IPL switch 3 is pressed, the IP
The LID number is output and the control shifts to 5CPI.

When 5CPZ receives control, it safely stores the state of 5CP7 and prohibits all interrupts. Next, the system controller searches the contents of the register I and checks the IPL flag. Here, when the IPL flag is ON, the IPL request is ignored, the safe-stored contents are returned, the interrupt is canceled, and control is transferred to the address where the interrupt occurred. When the IPL flag is OFF, a mailbox for the selected input/output device is prepared and input/output dj is performed.

〔Effect of the invention〕

Systems oriented toward distributed processing and unmanned systems equipped with automatic operation control mechanisms do not require system controls or dedicated machine operators like those found in σL calculators, so it is not possible for a third party to intentionally interrupt the system. Accidents are occurring frequently. In future computer systems, the number of general users will increase, and when considering the management and continuous use of machines, system security realized by the present invention will be essential, and will continue to become more important. According to the present invention, an information processing device that is free from the above-mentioned accidents and is suitable as a distributed processing system or an unmanned system can be provided.

In addition, the present invention applies to a power supply 0N10FFIC of an automatic driving control device.
It is also commercially available. '1nfON10FF The same control is possible between the switch and the firmware of the automatic driving control device.

[Brief explanation of the drawing]

The figure is a block diagram conceptually showing 11 examples of the present invention. L... Computer 71: Body (scp), 2... Power supply 0N
10FF switch, 3...IPL switch, 4...floppy disk, 5...power brake device, 11...
System control status register, 12...
Power source 1 routine, 13...IPL control routine. Out! Single agent patent attorney Takehiko SuzuePOWER
IpL

Claims (1)

[Claims] # Read the flags set/reset by the moratorium command,
It has a system control status register that maintains the operating state of the CPU, and a processing device that processes a request from the switch according to the contents of the system control status register by transmitting a call signal from a power supply 0N10FF switch or an IPL switch to the system. The processing device saves the current state by receiving the call signal from the switch, refers to the flag, ignores the request from the switch depending on the content, and resumes processing based on the saved content, or An information processing device that processes requests made by the switch.