JPH0365735A - Vicarious execution system for diagnosis processing - Google Patents

Abstract

PURPOSE:To improve the executive ability of diagnosis processing itself by providing a central processing unit with a diagnosis processing microprogram, and making this microprogram capable of being controlled from a diagnosis device, and executing vicariously a part of the diagnosis processing by using processing capacity of the central processing unit by the microprogram. CONSTITUTION:The central processing unit 2 operated by microprogram control and the diagnosis device 1 to execute the confirmation processing of the normality of a system constitute a part of this system. An address register 10 to hold a microprogram execution address and an address data setting means for setting data from the diagnosis device 1 in the register 10 are provided. Further, a start instructing means to start the execution of the microprogram of the central processing unit 2 from the set execution address 10 and the microprogram 20 set in the central processing unit 2 so as to execute the diagnosis processing are provided, and the central processing unit 2 executes vicariously a part of the diagnosis processing on the basis of the microprogram according to the instruction of the diagnosis device 1. Thus, the diagnosis processing capacilty is improved, and processing efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diagnostic processing proxy method for an information processing device, and particularly to a diagnostic processing proxy method in which a unit other than the diagnostic device executes a part of the diagnostic processing.

[Conventional technology]

Conventionally, diagnostic processing to confirm the system's normality and initial settings before the system starts operating are performed by each processor in the system in its own system initialization routine before the system starts operating. The usual method for all cases other than 2 was to be carried out by a specific unit called a diagnostic device operating an internal processor.

[Problem to be solved by the invention]

Therefore, when the scale of the system is increased to improve functionality or performance, the diagnostic processing area performed by the diagnostic unit also expands accordingly. Therefore, when the execution performance of the diagnostic device is limited to a certain level of performance, the time required for the diagnostic process at system startup becomes long relative to the scale of the system.

In order to solve this problem, it is necessary to improve the performance of the diagnostic device, optimize the diagnostic processing, or reduce the amount of diagnostic processing. However, in order to improve the performance of a diagnostic device, it is necessary to review the configuration of the diagnostic device itself and spend money and time for its design. In order to compensate for this, it becomes necessary to strengthen the self-diagnosis function of each device to be diagnosed.

In view of the above-mentioned points, an object of the present invention is to provide a method for improving the execution ability of diagnostic processing itself without newly trying to improve the performance of the diagnostic device.

[Means to solve the problem]

The diagnostic processing proxy method of the present invention is used in an information processing device that includes a central processing unit that operates under microprogram control and a diagnostic device that performs diagnostic processing to confirm the normality of the system. a microprogram execution address register in the central processing unit for holding; address data setting means for setting data from the diagnostic device to the execution address register; and execution of the microprogram in the central processing unit from the set execution address. The central processing unit is provided with a start instruction means for starting the diagnostic processing, and a microprogram set in the central processing unit to execute the diagnostic processing, and the central processing unit executes a part of the diagnostic processing based on the microprogram according to an instruction from the diagnostic device. Constructed on your behalf.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the figure, 1 is a diagnostic device, 2 is a central processing unit, 10 is an address register for storing the address of the microprogram to be executed next, 20 is a control memory in which the microprogram is stored, and 3o is an addressed control memory. 20 is a data register for setting the microprogram output from 20; 40 is a decoder for decoding the contents of the microprogram set in the data register 30; 50 is a control unit for controlling this microprogram execution sequence. Representing each. Further, 16 is a signal line for instructing a suppression mode for instructing the central processing unit 2 to execute software instructions and suppressing interrupt reception processing, and 17 is a signal line for instructing the address register 10 to start executing a microprogram. Signal line for start instruction, 19 is address register 1
Set multiple lines of address data to 1 to set to 0.
A set of data lines 18 represents a set strobe signal line for instructing to set the data on the data line 19 in the address register 10, respectively.

The diagnostic device 1 first activates the signal line 16 for inhibit mode instruction to instruct not to execute any software commands other than those instructed by this diagnostic interface or to accept interrupts. At this time, the control unit 5 of the central processing unit 2
0 causes this signal to stop the functions of the execution processing system (execution of software instructions, processing of interrupt reception, etc.). Next, the diagnostic device 1 sends the start address of the diagnostic microprogram to be executed stored in the control memory 20 onto the address set data line 19. Thereafter, a diagnosis start address is set in the address register 10 by outputting a set strobe pulse onto the address value set strobe signal line 18 (address data setting means). The output of register 10 is sent to control memory 20 through address line 11, and the corresponding microprogram data is output on data line 12.

Furthermore, the diagnostic device 1 activates the signal line 17 for instructing the start of execution, so that the control unit 5 in the central processing unit 2
0, the start instruction means (start instruction means) instructs to start execution of the microprogram from the address value stored in the address register 1o. Since the microprogram data corresponding to the address value already set in the central processing unit 2 has been output onto the data line 12, the control unit 5
0 sets this microprogram data in the data register 30 by generating a set pulse on the signal line 21. The microprogram set in the data register 30 is sent to the decoder 40 through the data line 13, where it is decoded and various execution controls are performed.

At the end of the execution routine of the diagnostic microprogram, a specific end instruction command is executed, and the decode 40 notifies the control unit 50 of the completion of the execution routine through the signal line 14. The control unit 50 recognizes the end of the execution routine based on this signal, and generates a pulse signal on the signal line 15 for reporting completion, thereby informing the diagnostic device 2.
Notify the end of diagnostic processing.

〔Effect of the invention〕

As explained above, the present invention provides a microprogram for diagnostic processing in the central processing unit, and enables the diagnostic equipment to set a specific start address and control the execution start of this microprogram. Since the ability can be used to perform part of the diagnostic processing on behalf of the user, there is an effect that the diagnostic processing efficiency can be improved.

In addition, in general, processing such as memory read/write and register setting within the central processing unit is performed by the central processing unit, since the processing capacity of the central processing unit greatly exceeds that of the diagnostic equipment. Delegating the department is
This in itself leads to an improvement in the diagnostic processing speed, but when the central processing unit is performing part of the diagnostic processing, the diagnostic device can also execute other diagnostic processing, and the central processing unit and the diagnostic device can Another effect is that when the diagnostic processing is executed in parallel, the diagnostic processing efficiency can be further improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 11.・Diagnostic device, 2...Central processing unit, 10...
(Microprogram execution) address register, 20.
... (for microprogram storage) control memory, 30 ... (for microprogram reading) data register, 40 ... (microprogram) decoder,
50... (Microprogram execution) control unit.

Claims (1)

[Claims] In an information processing device that includes a central processing unit that operates under microprogram control and a diagnostic device that performs diagnostic processing to confirm the normality of the system, a microprocessor in the central processing unit that holds a microprogram execution address a program execution address register; address data setting means for setting data from the diagnostic device to the execution address register; and start instruction means for causing the central processing unit to start executing the microprogram from the set execution address. and a microprogram set in the central processing unit to execute diagnostic processing, and the central processing unit performs part of the diagnostic processing on behalf of the user based on the microprogram according to instructions from the diagnostic device. Diagnosis processing proxy method.