18.2 of的函数集中的of是Open Firmware的缩写

  内核中操作dtb的一套函数都是of开头,这个of是open firmware。dts的方法来源于open Firmware

  On Sun SPARC systems, the Open Firmware interface is displayed on the console terminal before the bootstrapping of the system software.

  include/linux/of.h

  #ifndef _Linux_OF_H

  /* Definitions for talking to the Open Firmware PORM on Power Mcintosh and other computer.*/

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