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DM8127 的mcasp0 寄存器访问不了?

看数据手册mcasp0 的寄存器组基地址在0x48038000, 但是无论我用uboot的md命令还是直接用emulator,都无法访问这个区域;然而mcasp2的基地址在0x48050000 通过uboot的md命令或者直接用emulator查看这个地址都可以得到revision id 0x44307302 ,恳请有经验的朋友给点意见。