delay.h (582B)
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 10extern void __delay(unsigned long cycles); 11extern void __ndelay(unsigned long ns); 12extern 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 */