Abstract: ARM processor has already become the lead in the market of embedded system.Porting operATing system is the precondition and the foundATion for the development of an embedded system.

• 摘 要 ：在嵌入式系统中ARM 处理器已经成为市场主流, 移植操作系统是开发嵌入式系统的前提和基础, 而嵌入式操作系统的移植比较复杂。