Fault tolerance starting method of operating system based on RS (Reed-Solomon) coding and decoding

Abstract

The invention discloses a fault tolerance starting method of an operating system based on RS (Reed-Solomon) coding and decoding. The method comprises the following steps that: a large-capacity commercial memory such as FLASH is added based on a small-capacity anti-radiation PROM (programmable read-only memory), the fault tolerance starting boot is realized by use of the PROM, and the FLASH storesthe operating system and application subjected to RS fault-tolerant coding; a power-on aerospace computer starts the PROM moving software from the PROM; the PROM moving software reads the PROM decoding software from the PROM and stores in a designated address of the memory and runs the PROM decoding software; the PROM decoding software reads the operating system from the FLASH by use of an RS decoding algorithm and performs decoding fault correction, and moves the operating system to the system memory before starting and running; and the operating system reads the application software from the FLASH by use of the RS decoding algorithm and performs decoding fault correction, and moves the application software to the memory pool before loading and running. The method disclosed by the invention realizes secure boot of the small-capacity anti-radiation PROM and large-capacity operating system as well as fault-tolerant starting of the application at the same time.

Description

technical field [0001] The invention relates to the technical field of reliability design of aerospace computer program memory, in particular to an operating system fault-tolerant startup method based on RS coding and decoding. Background technique [0002] At present, the radiation-resistant program memory PROM used in aerospace computers is heavily dependent on imports, and the capacity of radiation-resistant program memory is usually relatively small. However, at present, aerospace computers usually adopt the operating system development mode, and the program memory occupied by the operating system and application programs is too large. Simply relying on the imported anti-radiation program memory PROM, its capacity cannot meet the application requirements. [0003] If commercial large-capacity FLASH or E 2 PROM stores the operating system and application program code, stores the boot program in the anti-radiation program memory to boot the operating system and applicatio...

AI Technical Summary

Problems solved by technology

However, at present, aerospace computers usually adopt the operating system development mode, and the program memory occupied by the operating system and application programs is too large. Simply relying on the imported anti-radiation program memory PROM, its capacity cannot meet the application requirements

[0003] If commercial large-capacity FLASH or E 2 The PROM stores the operating system and application program codes, and the boot program is stored in the anti-radiation program memory to guide the operating system and application programs to start, it may be due to FLASH or E 2 PROM does not have anti-radiation performance, which leads to the failure of the aerospace computer to start

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