Forum Post: RE: Unable to effectively access the address space of adi dmac 我发现只有地址的最后一位为0的寄存器才可以正常访问。 I found that only registers with the last bit of the address being 0 can be accessed normally. root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008000 32 0x00040461 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008004 32 0x00000000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008008 32 0x00000000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa000800c 32 0x00000000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008010 32 0x00082404 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008014 32 0x00000000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008080 32 0x00000003 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008400 32 0x00000000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008410 32 0x40010000 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008000 128 devmem: bad width root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008000 64 0x0000000000040461 root@ubuntu-arm64-zynqmp:/home/xilinx# busybox devmem 0xa0008410 64 0x0000000040010000
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