/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef __ASM_GENERIC_DELAY_H
  #define __ASM_GENERIC_DELAY_H

  /* Undefined functions to get compile-time errors */
  extern void __bad_udelay(void);
  extern void __bad_ndelay(void);

  extern void __udelay(unsigned long usecs);

  extern void __ndelay(unsigned long nsecs);
  extern void __const_udelay(unsigned long xloops);

  extern void __delay(unsigned long loops);

  /*
   * The weird n/20000 thing suppresses a "comparison is always false due to
   * limited range of data type" warning with non-const 8-bit arguments.
   */

  /* 0x10c7 is 2**32 / 1000000 (rounded up) */

  #define udelay(n)							\
  	({								\
  		if (__builtin_constant_p(n)) {				\
  			if ((n) / 20000 >= 1)				\
  				 __bad_udelay();			\
  			else						\
  				__const_udelay((n) * 0x10c7ul);		\
  		} else {						\
  			__udelay(n);					\
  		}							\
  	})

  
  /* 0x5 is 2**32 / 1000000000 (rounded up) */

  #define ndelay(n)							\
  	({								\
  		if (__builtin_constant_p(n)) {				\
  			if ((n) / 20000 >= 1)				\
  				__bad_ndelay();				\
  			else						\
  				__const_udelay((n) * 5ul);		\
  		} else {						\
  			__ndelay(n);					\
  		}							\
  	})

  
  #endif /* __ASM_GENERIC_DELAY_H */