调试通道例子。DCC is available on ARM cores which contain EmbeddedICE logic, e.g. ARM7TDMI, ARM9TDMI, etc. DCC is accessed by the target via coprocessor 14 using the ARM instructions MCR and MRC. The two assembler source files provided are: out

arm 协处理器指令MRC MCR的介绍，可以控制MMU单元。-MCR or MRC of arm instruction,so you can control MMU unit.