MCR和MRC指令在存储系统中的使用

MCR and MRC Instructions Used in the Storage System

ARM协处理器CP15中的MCR指令和MRC指令是非常重要的指令,担负着协处理器和主处理器之间的数据传递。对于虚拟存储来来讲作用尤为重要,它可以通过设置MMU、Cache、TLB表等操作来实现虚拟存储。MCR指令和MRC指令用法复杂,目前介绍这两个指令应用的资料不多,大多点到即止。该文主要通过具体实例介绍MCR指令和MRC指令在ARM存储系统中的使用情况。

MRC and MCR instructions are very important command in the ARM coprocessor CP15,their responsible is data transfer be tween co-processor and host processor.They are particularly important to virtual storage,it can set the MMU,Cache,TLB table and other operations to achieve the virtual storage.MCR and MRC instructions are complex instructions,Now,the application describe of these two commands is no more information.This paper mainly through concrete examples to introduced how to use MCR instructions and MRC instructions in the ARM memory system.