35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
|
#ifndef _ASM_POWERPC_DELAY_H
|
||
|
|
#define _ASM_POWERPC_DELAY_H
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 1996, Paul Mackerras.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* PPC64 Support added by Dave Engebretsen, Todd Inglett, Mike Corrigan,
|
||
|
|
* Anton Blanchard.
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern void __delay(unsigned long loops);
|
||
|
|
extern void udelay(unsigned long usecs);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* On shared processor machines the generic implementation of mdelay can
|
||
|
|
* result in large errors. While each iteration of the loop inside mdelay
|
||
|
|
* is supposed to take 1ms, the hypervisor could sleep our partition for
|
||
|
|
* longer (eg 10ms). With the right timing these errors can add up.
|
||
|
|
*
|
||
|
|
* Since there is no 32bit overflow issue on 64bit kernels, just call
|
||
|
|
* udelay directly.
|
||
|
|
*/
|
||
|
|
#ifdef CONFIG_PPC64
|
||
|
|
#define mdelay(n) udelay((n) * 1000)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __KERNEL__ */
|
||
|
|
#endif /* _ASM_POWERPC_DELAY_H */
|