arch/loongarch/include/asm/delay.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   4  */
   5 #ifndef _ASM_DELAY_H
   6 #define _ASM_DELAY_H
   7
   8 #include <linux/param.h>
   9
  10 extern void __delay(unsigned long cycles);
  11 extern void __ndelay(unsigned long ns);
  12 extern void __udelay(unsigned long us);
  13
  14 #define ndelay(ns) __ndelay(ns)
  15 #define udelay(us) __udelay(us)
  16
  17 /* make sure "usecs *= ..." in udelay do not overflow. */
  18 #if HZ >= 1000
  19 #define MAX_UDELAY_MS   1
  20 #elif HZ <= 200
  21 #define MAX_UDELAY_MS   5
  22 #else
  23 #define MAX_UDELAY_MS   (1000 / HZ)
  24 #endif
  25
  26 #endif /* _ASM_DELAY_H */