File: delay.h

package info (click to toggle)
linux 5.10.13-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,182,916 kB
  • sloc: ansic: 19,488,074; asm: 263,676; sh: 73,873; makefile: 44,685; perl: 34,640; python: 32,386; cpp: 6,070; yacc: 4,755; lex: 2,742; awk: 1,214; ruby: 25; sed: 5
file content (32 lines) | stat: -rw-r--r-- 841 bytes parent folder | download | duplicates (54)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994 by Waldorf Electronics
 * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2007  Maciej W. Rozycki
 */
#ifndef _ASM_DELAY_H
#define _ASM_DELAY_H

#include <linux/param.h>

extern void __delay(unsigned long loops);
extern void __ndelay(unsigned long ns);
extern void __udelay(unsigned long us);

#define ndelay(ns) __ndelay(ns)
#define udelay(us) __udelay(us)

/* make sure "usecs *= ..." in udelay do not overflow. */
#if HZ >= 1000
#define MAX_UDELAY_MS	1
#elif HZ <= 200
#define MAX_UDELAY_MS	5
#else
#define MAX_UDELAY_MS	(1000 / HZ)
#endif

#endif /* _ASM_DELAY_H */