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1da177e4 LT |
1 | #ifndef _ASM_PPC64_MEMORY_H_ |
2 | #define _ASM_PPC64_MEMORY_H_ | |
3 | ||
4 | /* | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | */ | |
10 | ||
11 | #include <linux/config.h> | |
12 | ||
13 | /* | |
14 | * Arguably the bitops and *xchg operations don't imply any memory barrier | |
15 | * or SMP ordering, but in fact a lot of drivers expect them to imply | |
16 | * both, since they do on x86 cpus. | |
17 | */ | |
18 | #ifdef CONFIG_SMP | |
19 | #define EIEIO_ON_SMP "eieio\n" | |
20 | #define ISYNC_ON_SMP "\n\tisync" | |
21 | #else | |
22 | #define EIEIO_ON_SMP | |
23 | #define ISYNC_ON_SMP | |
24 | #endif | |
25 | ||
26 | static inline void eieio(void) | |
27 | { | |
28 | __asm__ __volatile__ ("eieio" : : : "memory"); | |
29 | } | |
30 | ||
31 | static inline void isync(void) | |
32 | { | |
33 | __asm__ __volatile__ ("isync" : : : "memory"); | |
34 | } | |
35 | ||
36 | #ifdef CONFIG_SMP | |
37 | #define eieio_on_smp() eieio() | |
38 | #define isync_on_smp() isync() | |
39 | #else | |
40 | #define eieio_on_smp() __asm__ __volatile__("": : :"memory") | |
41 | #define isync_on_smp() __asm__ __volatile__("": : :"memory") | |
42 | #endif | |
43 | ||
44 | /* Macros for adjusting thread priority (hardware multi-threading) */ | |
45 | #define HMT_very_low() asm volatile("or 31,31,31 # very low priority") | |
46 | #define HMT_low() asm volatile("or 1,1,1 # low priority") | |
47 | #define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority") | |
48 | #define HMT_medium() asm volatile("or 2,2,2 # medium priority") | |
49 | #define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority") | |
50 | #define HMT_high() asm volatile("or 3,3,3 # high priority") | |
51 | ||
52 | #define HMT_VERY_LOW "\tor 31,31,31 # very low priority\n" | |
53 | #define HMT_LOW "\tor 1,1,1 # low priority\n" | |
54 | #define HMT_MEDIUM_LOW "\tor 6,6,6 # medium low priority\n" | |
55 | #define HMT_MEDIUM "\tor 2,2,2 # medium priority\n" | |
56 | #define HMT_MEDIUM_HIGH "\tor 5,5,5 # medium high priority\n" | |
57 | #define HMT_HIGH "\tor 3,3,3 # high priority\n" | |
58 | ||
59 | #endif |