JPH01232445A - Pseudo-error generation system - Google Patents

Abstract

PURPOSE:To generate a pseudo-hardware error with necessary property at necessary timing in an optional step of firmware by holding artificial error information in a pseudo-error register with an instruction of a microprogram and transferring the pseudo-error information to an error register at need. CONSTITUTION:The pseudo-error register 5 is provided and the pseudo-error information is held in the pseudo-error register 5 and transferred to the error register 3 when necessary to generate the pseudo-hardware error with necessary property at necessary timing in the optional step of firmware. Then the error processing by the firmware and software of the processor is easily evaluated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pseudo error generation method, and more particularly to a pseudo error generation method for generating a pseudo error in the hardware of a processing device.

[Conventional technology]

Generally, when a hardware error occurs in a processing device such as an information processing device, the error is handled by the firmware, and whether or not the error handling operation by the firmware is working correctly is tested by generating a pseudo error. It is necessary to evaluate the

Conventional pseudo-error generation methods employ a method of providing a hardware error factor from outside the processing device as a method for generating such pseudo-errors.

[Problem to be solved by the invention]

In the conventional pseudo-error generation method described above, the timing of error occurrence is given from the outside regardless of internal operations, so whether or not the error processing operation regarding the occurrence of an error at a specific timing is working correctly can be determined by using the pseudo-error method. It has the disadvantage that it cannot be tested and evaluated depending on the occurrence.

Furthermore, since the cause of the hardware error is provided from outside the processing device, there is a problem that it is not possible to generate a hardware error of the same nature as a hardware error inside the LSI.

An object of the present invention is to provide a pseudo-error register, store pseudo-error information in the pseudo-error register using microprogram instructions, and transfer the pseudo-error information to the error register when necessary. The object of the present invention is to provide a pseudo-error generation method that can generate a pseudo-hardware error of the necessary nature at the necessary timing.

[Means to solve the problem]

The pseudo error generation method of the present invention is a pseudo error generation method for a processing device that is controlled by a microprogram and has an error register that holds error information as a result of detecting a hardware error that has occurred. a pseudo error register capable of holding the same error information as the register; (B) pseudo error information writing means capable of writing various pseudo error information to the pseudo error register according to a first instruction of a microprogram; C) pseudo error information transfer means for generating a pseudo error indicated by the pseudo error information by transferring the pseudo error information held in the pseudo error register to the error register according to a second instruction of the microprogram; Configured with the necessary features.

〔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 pseudo error generation method of the present invention.

As shown in FIG. 1, in a processing device controlled by a microprogram, a hardware error detection logic 1 constantly detects hardware errors that occur during normal operation.

In addition, since the input selector 2 normally selects the output of the hardware error detection logic 1, the error information of this detection result is held in the error register 3 through the input selector 2, and is output to the hardware error output 4. It will be obtained.

On the other hand, the pseudo error register 5 can hold the same type of error information as the error register 3.

Further, various pseudo error information can be written into the pseudo error register 5 from the write path 6 by the first instruction of the microprogram as a pseudo error information writing means.

Furthermore, as a pseudo error information transfer means, the second instruction of the microprogram causes the input selector 2 to select the pseudo error register 5 in an arbitrary step of the firmware, and the pseudo error information held in the pseudo error register 5 is transferred to the pseudo error register 5. By transferring the pseudo error information to the register 3, the pseudo error information can be held in the error register 3.

As a result, pseudo error information can be sent from the hardware error output 4 which is the output of the error register 3.

As mentioned above, the pseudo error generation method of this embodiment is as follows:
By providing a pseudo-error register, using a microprogram instruction to store pseudo-error information in the pseudo-error register, and transferring the pseudo-error information to the error register when necessary, any necessary steps in the firmware can be made. Pseudo hardware errors of the desired nature in timing can be generated.

Therefore, error handling by firmware and software in the processing device can be easily evaluated.

〔Effect of the invention〕

As explained above, the pseudo error generation method of the present invention is
By providing a pseudo-error register, using a microprogram instruction to store pseudo-error information in the pseudo-error register, and transferring the pseudo-error information to the error register when necessary, any necessary steps in the firmware can be made. This has the effect that a pseudo hardware error of the necessary nature in timing can be generated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the pseudo error generation method of the present invention. 1...Hardware error detection logic, 2.
...Input selector, 3...Error register, 4...Hardware error output, 5...
...Pseudo error register, 6...Write path.

Claims (1)

[Scope of Claims] In a pseudo error generation method for a processing device that is controlled by a microprogram and has an error register that holds error information as a result of detecting a hardware error that has occurred, (A) the same as the error register; a pseudo error register capable of holding error information; (B) a pseudo error information writing means capable of writing various pseudo error information to the pseudo error register according to a first instruction of a micro program; (C) a micro pseudo error information transfer means for generating a pseudo error indicated by the pseudo error information by transferring the pseudo error information held in the pseudo error register to the error register according to a second instruction of a program; Features a pseudo error generation method.