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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  #ifndef _LINUX_NVRAM_H
       3  #define _LINUX_NVRAM_H
       4  
       5  #include <linux/ioctl.h>
       6  
       7  /* /dev/nvram ioctls */
       8  #define NVRAM_INIT	_IO('p', 0x40) /* initialize NVRAM and set checksum */
       9  #define NVRAM_SETCKS	_IO('p', 0x41) /* recalculate checksum */
      10  
      11  /* for all current systems, this is where NVRAM starts */
      12  #define NVRAM_FIRST_BYTE    14
      13  /* all these functions expect an NVRAM offset, not an absolute */
      14  #define NVRAM_OFFSET(x)   ((x)-NVRAM_FIRST_BYTE)
      15  
      16  
      17  #endif /* _LINUX_NVRAM_H */