Qin Pei,
1. ARM看DSP的L2 RAM物理地址是以L3的memory map。DSP看L2 RAM是dsp 的memory map，L2在dsp的memory map里面有DSP独有看的地址。首先确认ARM访问的物理地址是否正确。
2. DSP L2可以配为RAM也可以是cache，请确认你访问的是RAM的区域。
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