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介绍了Cache技术的基本原理,分析了DMA传输过程中存在Cache一致性问题,并介绍了几种解决Cache一致性问题方法 ,同时在实际应用中实现了安全的DMA传输设计。
This paper introduces the basic principle of Cache technology, analyzes the existence of Cache consistency in DMA transmission, and introduces several methods to solve the problem of Cache consistency. At the same time, it realizes secure DMA transfer design in practical application.