JPH0218626A - Interruption inhibition monitoring system - Google Patents

Abstract

PURPOSE:To early take a measure to an interruption inhibition state by monitoring this state and producing a monitor time excess signal to an interruption inhibition state that exceeds the monitor time for interruption inhibition. CONSTITUTION:An interruption inhibition state preserving part 1 is set in an interruption inhibition state by an interruption inhibition setting command and then released to its original state by an interruption inhibition release command. An interruption processing part 2 produces an interruption processing signal and an interruption permission signal generation part 3 produces an interruption permission signal only in case no interruption inhibition signal nor interruption processing signal is available. An interruption inhibition monitor timer part 4 starts a timer when the interruption permission signal is not available any more and produces an elapsed time signal under working to stop the working of the timer with production of the interruption permission signal. An interruption inhibition monitor time excess informing part 5 produces a monitor time excess signal when the value of the elapsed time signal exceeds the monitor time value for interruption inhibition. Thus it is possible to early take a measure to an interruption inhibition state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interrupt prohibition monitoring system, and more particularly to an interrupt prohibition monitoring system in a central processing unit of an information processing system.

[Conventional technology]

None of the central processing units of conventional information processing systems has an interrupt prohibition monitoring mechanism that monitors the interrupt prohibition state.

[Problem to be solved by the invention]

” The central processing unit of a conventional dual information processing system is
Since it does not have an interrupt disable monitoring mechanism that monitors the interrupt disable state, there is no way to alert you if you forget to cancel the interrupt disable state, so the state in which only interrupts can occur will continue indefinitely. There is a drawback that it does.

SUMMARY OF THE INVENTION An object of the present invention is to provide an interrupt prohibition monitoring method that can monitor an interrupt prohibition state and alert a user or a program to an interrupt prohibition state in which the interrupt prohibition monitoring time has exceeded. be.

[Means to solve the problem]

The interrupt prohibition monitoring system of the present invention has the following features: (A) An interrupt disable setting command causes an interrupt disable state in which an interrupt disable signal is generated, and an interrupt disable cancellation command returns the interrupt disable signal to a state in which no interrupt disable signal is generated. , (B) an interrupt processing section that executes interrupt processing and generates an interrupt processing signal indicating the state in which the interrupt processing is being executed; (D) an interrupt enable signal generating unit that generates an interrupt enable signal indicating that an interrupt is possible when there is no interrupt processing signal; (D) a timer operation starts when the interrupt enable signal of the interrupt enable signal generating unit disappears; an interrupt prohibition monitoring timer unit that generates an elapsed time signal during operation when the timer starts, and stops this timer operation upon generation of an interrupt enable signal from the interrupt enable signal generation unit; (E) progress from the interrupt prohibition monitor timer unit; The present invention includes an interrupt prohibition monitoring time excess notification section that generates a monitoring time excess signal when the value of the time signal exceeds a predetermined monitoring time value.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the interrupt prohibition monitoring method of the present invention.

As shown in FIG. 1, in the central processing unit of the information processing system, the interrupt disable state storage unit 1 enters the interrupt disable state in which the interrupt disable signal a is '1'' in response to an interrupt disable setting command, and interrupts are disabled. By the prohibition cancellation command, it is possible to return to the cancellation state in which the interrupt prohibition signal a is 0'''.

On the other hand, the interrupt processing unit 2 executes interrupt processing, and only outputs the interrupt processing signal while the interrupt processing is being executed.
becomes the state of

Furthermore, when the interrupt disable signal a of the interrupt disable state storage section 1 is "0'', the interrupt enable signal generating section 3 outputs the
If the interrupt processing signal C is 0'', the interrupt enable signal C is set to 1'', which indicates that an interrupt is possible.

Note that the interrupt enable signal generating section 3 generates a signal when either the interrupt disable signal a or the interrupt processing signal S becomes "1".
Immediately set the interrupt enable signal C to a state of "0'', which disables interrupts.

Therefore, the interrupt prohibition monitoring timer unit 4 starts the timer operation from when the interrupt enable signal C of the interrupt enable signal generating unit 3 becomes “o” state, and also generates the elapsed time signal d during operation, and interrupts. When the interrupt permission signal C of the permission signal generating section 3 becomes '1'', this timer operation is stopped.

When the value of the elapsed time signal d from the interrupt prohibition monitoring timer section 4 exceeds a predetermined interrupt prohibition monitoring time value, the next interrupt prohibition monitoring time excess notification section 5 sends a monitoring time excess signal e. is generated and sent.

As described above, the interrupt prohibition monitoring method of this embodiment is
It is possible to monitor the interrupt disabled state and alert the user or program to the interrupt disabled state in which the interrupt disabled monitoring time has been exceeded.

As a result, the user can sense that the central processing unit of the information processing system continues to be inadvertently disabled for interrupts, and can take early countermeasures.

〔Effect of the invention〕 > (:′.

62 - As explained above, the interrupt disable monitoring method of the present invention monitors the interrupt disable state and alerts the user or program to the interrupt disable state that has exceeded the interrupt disable monitoring time. It has the effect of being able to evoke feelings.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the interrupt prohibition monitoring method of the present invention. 1...Interrupt disable state storage section, 2...Interrupt processing section, 3...Interrupt enable signal generation section, 4...Interrupt disable monitoring timer section, 5...Interrupt disable monitoring Time exceedance notification section, a... Interrupt prohibition signal, l]... Interrupt processing signal, C... Interrupt permission signal, d... Elapsed time signal, e... Monitoring time exceeded signal.

Claims (1)

[Scope of Claims] (A) An interrupt prohibition state storage unit that enters an interrupt prohibition state in which an interrupt prohibition signal is generated by an interrupt prohibition setting command, and returns to a state in which no interrupt prohibition signal is generated by an interrupt prohibition release command; (B) an interrupt processing section that executes interrupt processing and generates an interrupt processing signal indicating a state in which the interrupt processing is being executed; (C) there is no interrupt disabling signal in the interrupt disabling state storage section; (D) an interrupt enable signal generator that generates an interrupt enable signal indicating that an interrupt is possible only when the interrupt enable signal is not available; (E) a value of the elapsed time signal from the interrupt prohibition monitoring timer section; An interrupt prohibition monitoring method, comprising: an interrupt prohibition monitoring time excess notification section that generates a monitoring time excess signal when the monitoring time exceeds a predetermined monitoring time value.