The setup_arch also needs to perform any memory mappings for flash Banks, system registers, and other specific devices.
setup_arch还需要对闪存存储库、系统寄存器和其它特定设备执行内存映射。
Release is called when there are no more references to an open file — all file descriptors are closed and all memory mappings are unmapped.
release是在对一个打开文件没有其他引用时调用的——此时所有的文件描述符都会被关闭，所有的内存映射都会被取消。
Release is called when there are no more references to an open file — all file descriptors are closed and all memory mappings are unmapped.
release是在对一个打开文件没有其他引用时调用的——此时所有的文件描述符都会被关闭，所有的内存映射都会被取消。
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