A Hot Switching Method of Dual-mode Redundant Microprocessor

Abstract

The invention discloses a hot switching method for a dual-mode redundant microprocessor, and aims to provide better processor state monitoring and fault-tolerance effects and endow a processor with a hot switching capability so as to improve the stability and adaptability of an embedded microprocessor in a radiation environment. The adopted technical scheme is that a judgment logic of a dual-mode redundant processor is established; an instruction state machine, address access, data flow processing and a processor state are monitored separately; the processor state is evaluated; during resetting, a second processor is in an idle state, a first processor executes the instruction content in a memory in sequence until the first processor has an error, at the moment, processor switching is performed, and a bus switching logic cuts off a data path of the first processor, transfers data to the second processor and sends a switching interruption request to the second processor; and the second processor uses data in a shared data memory to restore an execution state of the first processor and continues to execute an instruction, thereby realizing the hot switching.

Description

technical field [0001] The invention relates to a design method of a dual-mode redundant processor, in particular to a hot switching method for a dual-mode redundant microprocessor. Background technique [0002] Existing microprocessor systems usually use a single-core processor as the control core. Once the control core fails, usually only soft errors can be repaired, and there is nothing to do about hardware errors. [0003] Redundancy technology responds to equipment failures through hardware redundancy. Redundancy is usually 3 or more equipment modules working at the same time, which makes the power consumption, volume, and resource occupation of the equipment more than three times the original, which is extremely unsuitable for microprocessor applications. The design has brought great difficulty. [0004] Dual-mode redundancy technology refers to the use of two identical subsystems or modules in the same system, and the two modules are mutually backed up for automatic...

AI Technical Summary

Problems solved by technology

Data exchange cannot be performed between the two processors, or the data exchange method is relatively complicated, and additional components are required for data exchange

On the one hand, there is inaccuracy in state detection, which can only detect loop interrupt errors, and it is difficult to find errors in instruction loops, conditional jumps, and data calculations; on the other hand, the difficulty of data exchange makes it impossible for the two processors to connect The work state is quickly handed over to the additional processor, making the execution efficiency of the program very low when switching

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