File: delay.h

package info (click to toggle)
linux-kernel-headers 2.6.18-7
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k
  • size: 38,648 kB
  • ctags: 300,882
  • sloc: ansic: 461,192; asm: 1,555; cpp: 340; makefile: 312; sh: 110
file content (27 lines) | stat: -rw-r--r-- 690 bytes parent folder | download | duplicates (6) 
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
 
#ifndef __ASM_SH_DELAY_H
#define __ASM_SH_DELAY_H

/*
 * Copyright (C) 1993 Linus Torvalds
 *
 * Delay routines calling functions in arch/sh/lib/delay.c
 */
 
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 usecs);
extern void __delay(unsigned long loops);

#define udelay(n) (__builtin_constant_p(n) ? \
	((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c6ul)) : \
	__udelay(n))


#define ndelay(n) (__builtin_constant_p(n) ? \
	((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
	__ndelay(n))

#endif /* __ASM_SH_DELAY_H */