Commit | Line | Data |
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ebac4655 JA |
1 | #ifndef ARCH_PPC_H |
2 | #define ARCH_PPH_H | |
3 | ||
4 | #define ARCH (arch_ppc) | |
5 | ||
6 | #ifndef __NR_ioprio_set | |
7 | #define __NR_ioprio_set 273 | |
8 | #define __NR_ioprio_get 274 | |
9 | #endif | |
10 | ||
11 | #ifndef __NR_fadvise64 | |
12 | #define __NR_fadvise64 233 | |
13 | #endif | |
14 | ||
8756e4d4 JA |
15 | #ifndef __NR_sys_splice |
16 | #define __NR_sys_splice 283 | |
17 | #define __NR_sys_tee 284 | |
18 | #define __NR_sys_vmsplice 285 | |
19 | #endif | |
20 | ||
ebac4655 JA |
21 | #define nop do { } while (0) |
22 | ||
db6defc7 | 23 | #ifdef __powerpc64__ |
44c47feb | 24 | #define read_barrier() __asm__ __volatile__ ("lwsync" : : : "memory") |
db6defc7 | 25 | #else |
44c47feb | 26 | #define read_barrier() __asm__ __volatile__ ("sync" : : : "memory") |
db6defc7 JA |
27 | #endif |
28 | ||
44c47feb JA |
29 | #define write_barrier() __asm__ __volatile__ ("sync" : : : "memory") |
30 | ||
8f7e39dd JA |
31 | static inline int __ilog2(unsigned long bitmask) |
32 | { | |
33 | int lz; | |
34 | ||
35 | asm ("cntlzw %0,%1" : "=r" (lz) : "r" (bitmask)); | |
36 | return 31 - lz; | |
37 | } | |
38 | ||
39 | static inline int arch_ffz(unsigned long bitmask) | |
40 | { | |
41 | if ((bitmask = ~bitmask) == 0) | |
42 | return 32; | |
43 | return __ilog2(bitmask & -bitmask); | |
44 | } | |
45 | #define ARCH_HAVE_FFZ | |
46 | ||
69ebbd39 JA |
47 | typedef struct { |
48 | volatile unsigned int lock; | |
49 | } spinlock_t; | |
50 | ||
51 | static inline void spin_trylock(spinlock_t *lock) | |
52 | { | |
53 | unsigned long tmp; | |
54 | ||
55 | __asm__ __volatile__( | |
56 | "1: lwarx %0,0,%2\n\ | |
57 | cmpwi 0,%0,0\n\ | |
58 | bne- 2f\n\ | |
59 | stwcx. 1,0,%2\n\ | |
60 | bne- 1b\n\ | |
61 | isync\n\ | |
62 | 2:" : "=&r" (tmp) | |
63 | : (&lock->lock) | |
64 | : "cr0", "memory"); | |
65 | ||
66 | return tmp; | |
67 | } | |
68 | ||
69 | static inline void spin_lock(spinlock_t *lock) | |
70 | { | |
71 | while (spin_trylock(lock)) | |
72 | ; | |
73 | } | |
74 | ||
75 | static inline void spin_unlock(spinlock_t *lock) | |
76 | { | |
77 | read_barrier(); | |
78 | lock->lock = 0; | |
79 | } | |
80 | ||
ebac4655 | 81 | #endif |