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c55377ee PM |
1 | #ifndef _ASM_POWERPC_DELAY_H |
2 | #define _ASM_POWERPC_DELAY_H | |
88ced031 | 3 | #ifdef __KERNEL__ |
1da177e4 LT |
4 | |
5 | /* | |
6 | * Copyright 1996, Paul Mackerras. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | * PPC64 Support added by Dave Engebretsen, Todd Inglett, Mike Corrigan, | |
14 | * Anton Blanchard. | |
15 | */ | |
16 | ||
6defa38b PM |
17 | extern void __delay(unsigned long loops); |
18 | extern void udelay(unsigned long usecs); | |
1da177e4 | 19 | |
1e92a550 AB |
20 | /* |
21 | * On shared processor machines the generic implementation of mdelay can | |
22 | * result in large errors. While each iteration of the loop inside mdelay | |
23 | * is supposed to take 1ms, the hypervisor could sleep our partition for | |
24 | * longer (eg 10ms). With the right timing these errors can add up. | |
25 | * | |
26 | * Since there is no 32bit overflow issue on 64bit kernels, just call | |
27 | * udelay directly. | |
28 | */ | |
29 | #ifdef CONFIG_PPC64 | |
30 | #define mdelay(n) udelay((n) * 1000) | |
31 | #endif | |
32 | ||
88ced031 | 33 | #endif /* __KERNEL__ */ |
c55377ee | 34 | #endif /* _ASM_POWERPC_DELAY_H */ |