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
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 */