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2 年
实验2 - 流水线异常和中断设计
RISC-V有三种特权级:M mode, S mode, U mode。设置不同的特权级可以用来管理系统资源的使用,提供软件的保护。其中,M mode的级别最高,是RISC-V硬件必须实现的,在M mode下跑的代码都被认为是安全可信的。U mode级别最低,在该模式下执行用户程序,对应于操作系统的 ...
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