Protection method for processor instruction cache single event flip soft error

Abstract

The present invention provides a protection method for processor instruction Cache single event flipping soft errors. The method includes: determining the fault exception type caused by processor instruction Cache single event flipping; Error recovery function; according to the fault exception type, start the corresponding single event flipping soft error recovery function; through the single event flipping soft error recovery function, save the return address in the abnormal return address register of the processor, and invalidate the processor instruction cache The conversion operation; the address where the single event flip occurs is determined by the return address; the data corresponding to the address where the single event flip occurs is reacquired from the main memory, and the data restoration of the single event flip is performed. Therefore, the problem of program soft errors caused by single event flipping in the application of the processor in the on-board computer is solved, and it has the advantages of simple structure, low cost, high execution efficiency and wide applicability.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular, to a protection method for a single-event overturn soft error of a processor instruction Cache. Background technique [0002] With the development of spacecraft in the direction of long-life and high reliability, single-particle flips caused by galactic cosmic rays, solar cosmic rays, and high-energy charged particles in the Earth's radiation belt, especially heavy ions, have become a must for the reliable operation of spacecraft in orbit. a key factor of concern. Single event flipping is the effect of charged particle radiation on logic devices and logic circuits. When a single space high-energy charged particle bombards the chips of microelectronic devices in large-scale and ultra-large-scale integrated circuits, it will cause instantaneous logic errors or hard errors in logic devices or circuits, such as the data stored in memory cells. "0" or "0" is turned to "1"), resulti...

AI Technical Summary

Problems solved by technology

[0004] However, there is no hardened PPC750 processor corresponding to RAD750 in China at present, and the research on radiation resistance hardening of this high-speed processor is just in its infancy

As the main single-event-sensitive component of a high-performance processor, the single-event flip in the instruction cache will cause soft errors in the program flow, which will bring problems to the application of the processor in on-board computer products

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