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CORTEXA8 ICACHE

arm程序中 Enable ICache, 仿真时汇编代码卡在写入配置mcr p15,0,r0,c1,c0,0 处,波形中输出信号SECMONOUT[78]置1了,但ARM的AXI输出之后再没有动作;由于A8的大部分代码加密,找不到原因的突破口。请问开ICache后可能哪些原因导致代码停在开Cache的指令,或者我可以查看哪些信号可代表ICache是否开启?