diff options
Diffstat (limited to 'include/asm-sh/atomic.h')
-rw-r--r-- | include/asm-sh/atomic.h | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/include/asm-sh/atomic.h b/include/asm-sh/atomic.h deleted file mode 100644 index c043ef003028..000000000000 --- a/include/asm-sh/atomic.h +++ /dev/null | |||
@@ -1,89 +0,0 @@ | |||
1 | #ifndef __ASM_SH_ATOMIC_H | ||
2 | #define __ASM_SH_ATOMIC_H | ||
3 | |||
4 | /* | ||
5 | * Atomic operations that C can't guarantee us. Useful for | ||
6 | * resource counting etc.. | ||
7 | * | ||
8 | */ | ||
9 | |||
10 | typedef struct { volatile int counter; } atomic_t; | ||
11 | |||
12 | #define ATOMIC_INIT(i) ( (atomic_t) { (i) } ) | ||
13 | |||
14 | #define atomic_read(v) ((v)->counter) | ||
15 | #define atomic_set(v,i) ((v)->counter = (i)) | ||
16 | |||
17 | #include <linux/compiler.h> | ||
18 | #include <asm/system.h> | ||
19 | |||
20 | #if defined(CONFIG_GUSA_RB) | ||
21 | #include <asm/atomic-grb.h> | ||
22 | #elif defined(CONFIG_CPU_SH4A) | ||
23 | #include <asm/atomic-llsc.h> | ||
24 | #else | ||
25 | #include <asm/atomic-irq.h> | ||
26 | #endif | ||
27 | |||
28 | #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) | ||
29 | |||
30 | #define atomic_dec_return(v) atomic_sub_return(1,(v)) | ||
31 | #define atomic_inc_return(v) atomic_add_return(1,(v)) | ||
32 | |||
33 | /* | ||
34 | * atomic_inc_and_test - increment and test | ||
35 | * @v: pointer of type atomic_t | ||
36 | * | ||
37 | * Atomically increments @v by 1 | ||
38 | * and returns true if the result is zero, or false for all | ||
39 | * other cases. | ||
40 | */ | ||
41 | #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) | ||
42 | |||
43 | #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) | ||
44 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | ||
45 | |||
46 | #define atomic_inc(v) atomic_add(1,(v)) | ||
47 | #define atomic_dec(v) atomic_sub(1,(v)) | ||
48 | |||
49 | #ifndef CONFIG_GUSA_RB | ||
50 | static inline int atomic_cmpxchg(atomic_t *v, int old, int new) | ||
51 | { | ||
52 | int ret; | ||
53 | unsigned long flags; | ||
54 | |||
55 | local_irq_save(flags); | ||
56 | ret = v->counter; | ||
57 | if (likely(ret == old)) | ||
58 | v->counter = new; | ||
59 | local_irq_restore(flags); | ||
60 | |||
61 | return ret; | ||
62 | } | ||
63 | |||
64 | static inline int atomic_add_unless(atomic_t *v, int a, int u) | ||
65 | { | ||
66 | int ret; | ||
67 | unsigned long flags; | ||
68 | |||
69 | local_irq_save(flags); | ||
70 | ret = v->counter; | ||
71 | if (ret != u) | ||
72 | v->counter += a; | ||
73 | local_irq_restore(flags); | ||
74 | |||
75 | return ret != u; | ||
76 | } | ||
77 | #endif | ||
78 | |||
79 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) | ||
80 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | ||
81 | |||
82 | /* Atomic operations are already serializing on SH */ | ||
83 | #define smp_mb__before_atomic_dec() barrier() | ||
84 | #define smp_mb__after_atomic_dec() barrier() | ||
85 | #define smp_mb__before_atomic_inc() barrier() | ||
86 | #define smp_mb__after_atomic_inc() barrier() | ||
87 | |||
88 | #include <asm-generic/atomic.h> | ||
89 | #endif /* __ASM_SH_ATOMIC_H */ | ||