一种用于软件在线自检的处理器屏蔽

Ching-Wen Lin, C. Chen
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引用次数: 1

摘要

基于软件的处理器自检通常会忽略与系统相关的测试问题,如中断、内存映射IOs,尤其是在线测试。我们提出了一种处理器SBST测试的体系结构支持:处理器屏蔽,它可以解决在线SBST中难以测试的问题。我们开发了一个执行流来控制处理器屏蔽和运行SBST程序,而不干扰其他进程和总线上的设备。最后,我们给出了一个案例研究,该案例研究在armv5兼容的处理器系统上在Linux内核下执行SBST程序。该方法可以实现测试进程和内核进程的切换,达到预期的高处理器故障覆盖率。与处理器的逻辑部分相比,处理器屏蔽的硬件开销为2.6%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A processor shield for software-based on-line self-test
Software-based processor self-test typically ignores system related testing issues such as interrupt, memory-mapped IOs, especially for on-line testing. We propose an architectural support for processor SBST testing: Processor Shield, which can tackle the difficult-to-test issues during on-line SBST. We develop an execution flow to control the processor shield and run the SBST program without interfering other processes and on-bus devices. Finally, we present a case study that executes the SBST program under Linux kernel on an ARMv5-compatible processor system. Our method can successfully switch the test process and the kernel process and achieve the expected high processor fault coverage. The hardware overhead of the processor shield is 2.6% compared to the logic part of the processor.
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