#ifndef _UAPI_LINUX_NVRAM_H
  #define _UAPI_LINUX_NVRAM_H
  
  #include <linux/ioctl.h>
  
  /* /dev/nvram ioctls */
  #define NVRAM_INIT	_IO('p', 0x40) /* initialize NVRAM and set checksum */
  #define NVRAM_SETCKS	_IO('p', 0x41) /* recalculate checksum */
  
  /* for all current systems, this is where NVRAM starts */
  #define NVRAM_FIRST_BYTE    14
  /* all these functions expect an NVRAM offset, not an absolute */
  #define NVRAM_OFFSET(x)   ((x)-NVRAM_FIRST_BYTE)
  
  
  #endif /* _UAPI_LINUX_NVRAM_H */