/* SPDX-License-Identifier: GPL-2.0 */
  #ifndef __LINUX_BITS_H
  #define __LINUX_BITS_H

  
  #include <linux/const.h>

  #include <asm/bitsperlong.h>

  #define BIT(nr)			(UL(1) << (nr))
  #define BIT_ULL(nr)		(ULL(1) << (nr))
  #define BIT_MASK(nr)		(UL(1) << ((nr) % BITS_PER_LONG))

  #define BIT_WORD(nr)		((nr) / BITS_PER_LONG)

  #define BIT_ULL_MASK(nr)	(ULL(1) << ((nr) % BITS_PER_LONG_LONG))

  #define BIT_ULL_WORD(nr)	((nr) / BITS_PER_LONG_LONG)
  #define BITS_PER_BYTE		8
  
  /*
   * Create a contiguous bitmask starting at bit position @l and ending at
   * position @h. For example
   * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
   */
  #define GENMASK(h, l) \

  	(((~UL(0)) - (UL(1) << (l)) + 1) & \
  	 (~UL(0) >> (BITS_PER_LONG - 1 - (h))))

  
  #define GENMASK_ULL(h, l) \

  	(((~ULL(0)) - (ULL(1) << (l)) + 1) & \
  	 (~ULL(0) >> (BITS_PER_LONG_LONG - 1 - (h))))

  
  #endif	/* __LINUX_BITS_H */