diff options
Diffstat (limited to 'include/asm-alpha/local.h')
-rw-r--r-- | include/asm-alpha/local.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/include/asm-alpha/local.h b/include/asm-alpha/local.h deleted file mode 100644 index 6ad3ea696421..000000000000 --- a/include/asm-alpha/local.h +++ /dev/null | |||
@@ -1,118 +0,0 @@ | |||
1 | #ifndef _ALPHA_LOCAL_H | ||
2 | #define _ALPHA_LOCAL_H | ||
3 | |||
4 | #include <linux/percpu.h> | ||
5 | #include <asm/atomic.h> | ||
6 | |||
7 | typedef struct | ||
8 | { | ||
9 | atomic_long_t a; | ||
10 | } local_t; | ||
11 | |||
12 | #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) } | ||
13 | #define local_read(l) atomic_long_read(&(l)->a) | ||
14 | #define local_set(l,i) atomic_long_set(&(l)->a, (i)) | ||
15 | #define local_inc(l) atomic_long_inc(&(l)->a) | ||
16 | #define local_dec(l) atomic_long_dec(&(l)->a) | ||
17 | #define local_add(i,l) atomic_long_add((i),(&(l)->a)) | ||
18 | #define local_sub(i,l) atomic_long_sub((i),(&(l)->a)) | ||
19 | |||
20 | static __inline__ long local_add_return(long i, local_t * l) | ||
21 | { | ||
22 | long temp, result; | ||
23 | __asm__ __volatile__( | ||
24 | "1: ldq_l %0,%1\n" | ||
25 | " addq %0,%3,%2\n" | ||
26 | " addq %0,%3,%0\n" | ||
27 | " stq_c %0,%1\n" | ||
28 | " beq %0,2f\n" | ||
29 | ".subsection 2\n" | ||
30 | "2: br 1b\n" | ||
31 | ".previous" | ||
32 | :"=&r" (temp), "=m" (l->a.counter), "=&r" (result) | ||
33 | :"Ir" (i), "m" (l->a.counter) : "memory"); | ||
34 | return result; | ||
35 | } | ||
36 | |||
37 | static __inline__ long local_sub_return(long i, local_t * l) | ||
38 | { | ||
39 | long temp, result; | ||
40 | __asm__ __volatile__( | ||
41 | "1: ldq_l %0,%1\n" | ||
42 | " subq %0,%3,%2\n" | ||
43 | " subq %0,%3,%0\n" | ||
44 | " stq_c %0,%1\n" | ||
45 | " beq %0,2f\n" | ||
46 | ".subsection 2\n" | ||
47 | "2: br 1b\n" | ||
48 | ".previous" | ||
49 | :"=&r" (temp), "=m" (l->a.counter), "=&r" (result) | ||
50 | :"Ir" (i), "m" (l->a.counter) : "memory"); | ||
51 | return result; | ||
52 | } | ||
53 | |||
54 | #define local_cmpxchg(l, o, n) \ | ||
55 | (cmpxchg_local(&((l)->a.counter), (o), (n))) | ||
56 | #define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n))) | ||
57 | |||
58 | /** | ||
59 | * local_add_unless - add unless the number is a given value | ||
60 | * @l: pointer of type local_t | ||
61 | * @a: the amount to add to l... | ||
62 | * @u: ...unless l is equal to u. | ||
63 | * | ||
64 | * Atomically adds @a to @l, so long as it was not @u. | ||
65 | * Returns non-zero if @l was not @u, and zero otherwise. | ||
66 | */ | ||
67 | #define local_add_unless(l, a, u) \ | ||
68 | ({ \ | ||
69 | long c, old; \ | ||
70 | c = local_read(l); \ | ||
71 | for (;;) { \ | ||
72 | if (unlikely(c == (u))) \ | ||
73 | break; \ | ||
74 | old = local_cmpxchg((l), c, c + (a)); \ | ||
75 | if (likely(old == c)) \ | ||
76 | break; \ | ||
77 | c = old; \ | ||
78 | } \ | ||
79 | c != (u); \ | ||
80 | }) | ||
81 | #define local_inc_not_zero(l) local_add_unless((l), 1, 0) | ||
82 | |||
83 | #define local_add_negative(a, l) (local_add_return((a), (l)) < 0) | ||
84 | |||
85 | #define local_dec_return(l) local_sub_return(1,(l)) | ||
86 | |||
87 | #define local_inc_return(l) local_add_return(1,(l)) | ||
88 | |||
89 | #define local_sub_and_test(i,l) (local_sub_return((i), (l)) == 0) | ||
90 | |||
91 | #define local_inc_and_test(l) (local_add_return(1, (l)) == 0) | ||
92 | |||
93 | #define local_dec_and_test(l) (local_sub_return(1, (l)) == 0) | ||
94 | |||
95 | /* Verify if faster than atomic ops */ | ||
96 | #define __local_inc(l) ((l)->a.counter++) | ||
97 | #define __local_dec(l) ((l)->a.counter++) | ||
98 | #define __local_add(i,l) ((l)->a.counter+=(i)) | ||
99 | #define __local_sub(i,l) ((l)->a.counter-=(i)) | ||
100 | |||
101 | /* Use these for per-cpu local_t variables: on some archs they are | ||
102 | * much more efficient than these naive implementations. Note they take | ||
103 | * a variable, not an address. | ||
104 | */ | ||
105 | #define cpu_local_read(l) local_read(&__get_cpu_var(l)) | ||
106 | #define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i)) | ||
107 | |||
108 | #define cpu_local_inc(l) local_inc(&__get_cpu_var(l)) | ||
109 | #define cpu_local_dec(l) local_dec(&__get_cpu_var(l)) | ||
110 | #define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l)) | ||
111 | #define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l)) | ||
112 | |||
113 | #define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l)) | ||
114 | #define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l)) | ||
115 | #define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l)) | ||
116 | #define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l)) | ||
117 | |||
118 | #endif /* _ALPHA_LOCAL_H */ | ||