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基完成了把gpio 切到cpu2的先关设置，但是不知道还有没有别的先关设置，请指点。
在cpu1里设置如下, setup_emif1_pinmux_async_16bit(GPIO_MUX_CPU2); //将数据地址总线io 切到cpu2，别的不知道还要设置什么？
