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-rw-r--r--include/asm-cris/atomic.h66
1 files changed, 24 insertions, 42 deletions
diff --git a/include/asm-cris/atomic.h b/include/asm-cris/atomic.h
index b3dfea5a71e4..70605b09e8b7 100644
--- a/include/asm-cris/atomic.h
+++ b/include/asm-cris/atomic.h
@@ -4,21 +4,14 @@
4#define __ASM_CRIS_ATOMIC__ 4#define __ASM_CRIS_ATOMIC__
5 5
6#include <asm/system.h> 6#include <asm/system.h>
7#include <asm/arch/atomic.h>
7 8
8/* 9/*
9 * Atomic operations that C can't guarantee us. Useful for 10 * Atomic operations that C can't guarantee us. Useful for
10 * resource counting etc.. 11 * resource counting etc..
11 */ 12 */
12 13
13/* 14typedef struct { volatile int counter; } atomic_t;
14 * Make sure gcc doesn't try to be clever and move things around
15 * on us. We need to use _exactly_ the address the user gave us,
16 * not some alias that contains the same information.
17 */
18
19#define __atomic_fool_gcc(x) (*(struct { int a[100]; } *)x)
20
21typedef struct { int counter; } atomic_t;
22 15
23#define ATOMIC_INIT(i) { (i) } 16#define ATOMIC_INIT(i) { (i) }
24 17
@@ -30,29 +23,26 @@ typedef struct { int counter; } atomic_t;
30extern __inline__ void atomic_add(int i, volatile atomic_t *v) 23extern __inline__ void atomic_add(int i, volatile atomic_t *v)
31{ 24{
32 unsigned long flags; 25 unsigned long flags;
33 local_save_flags(flags); 26 cris_atomic_save(v, flags);
34 local_irq_disable();
35 v->counter += i; 27 v->counter += i;
36 local_irq_restore(flags); 28 cris_atomic_restore(v, flags);
37} 29}
38 30
39extern __inline__ void atomic_sub(int i, volatile atomic_t *v) 31extern __inline__ void atomic_sub(int i, volatile atomic_t *v)
40{ 32{
41 unsigned long flags; 33 unsigned long flags;
42 local_save_flags(flags); 34 cris_atomic_save(v, flags);
43 local_irq_disable();
44 v->counter -= i; 35 v->counter -= i;
45 local_irq_restore(flags); 36 cris_atomic_restore(v, flags);
46} 37}
47 38
48extern __inline__ int atomic_add_return(int i, volatile atomic_t *v) 39extern __inline__ int atomic_add_return(int i, volatile atomic_t *v)
49{ 40{
50 unsigned long flags; 41 unsigned long flags;
51 int retval; 42 int retval;
52 local_save_flags(flags); 43 cris_atomic_save(v, flags);
53 local_irq_disable();
54 retval = (v->counter += i); 44 retval = (v->counter += i);
55 local_irq_restore(flags); 45 cris_atomic_restore(v, flags);
56 return retval; 46 return retval;
57} 47}
58 48
@@ -62,10 +52,9 @@ extern __inline__ int atomic_sub_return(int i, volatile atomic_t *v)
62{ 52{
63 unsigned long flags; 53 unsigned long flags;
64 int retval; 54 int retval;
65 local_save_flags(flags); 55 cris_atomic_save(v, flags);
66 local_irq_disable();
67 retval = (v->counter -= i); 56 retval = (v->counter -= i);
68 local_irq_restore(flags); 57 cris_atomic_restore(v, flags);
69 return retval; 58 return retval;
70} 59}
71 60
@@ -73,39 +62,35 @@ extern __inline__ int atomic_sub_and_test(int i, volatile atomic_t *v)
73{ 62{
74 int retval; 63 int retval;
75 unsigned long flags; 64 unsigned long flags;
76 local_save_flags(flags); 65 cris_atomic_save(v, flags);
77 local_irq_disable();
78 retval = (v->counter -= i) == 0; 66 retval = (v->counter -= i) == 0;
79 local_irq_restore(flags); 67 cris_atomic_restore(v, flags);
80 return retval; 68 return retval;
81} 69}
82 70
83extern __inline__ void atomic_inc(volatile atomic_t *v) 71extern __inline__ void atomic_inc(volatile atomic_t *v)
84{ 72{
85 unsigned long flags; 73 unsigned long flags;
86 local_save_flags(flags); 74 cris_atomic_save(v, flags);
87 local_irq_disable();
88 (v->counter)++; 75 (v->counter)++;
89 local_irq_restore(flags); 76 cris_atomic_restore(v, flags);
90} 77}
91 78
92extern __inline__ void atomic_dec(volatile atomic_t *v) 79extern __inline__ void atomic_dec(volatile atomic_t *v)
93{ 80{
94 unsigned long flags; 81 unsigned long flags;
95 local_save_flags(flags); 82 cris_atomic_save(v, flags);
96 local_irq_disable();
97 (v->counter)--; 83 (v->counter)--;
98 local_irq_restore(flags); 84 cris_atomic_restore(v, flags);
99} 85}
100 86
101extern __inline__ int atomic_inc_return(volatile atomic_t *v) 87extern __inline__ int atomic_inc_return(volatile atomic_t *v)
102{ 88{
103 unsigned long flags; 89 unsigned long flags;
104 int retval; 90 int retval;
105 local_save_flags(flags); 91 cris_atomic_save(v, flags);
106 local_irq_disable();
107 retval = (v->counter)++; 92 retval = (v->counter)++;
108 local_irq_restore(flags); 93 cris_atomic_restore(v, flags);
109 return retval; 94 return retval;
110} 95}
111 96
@@ -113,20 +98,18 @@ extern __inline__ int atomic_dec_return(volatile atomic_t *v)
113{ 98{
114 unsigned long flags; 99 unsigned long flags;
115 int retval; 100 int retval;
116 local_save_flags(flags); 101 cris_atomic_save(v, flags);
117 local_irq_disable();
118 retval = (v->counter)--; 102 retval = (v->counter)--;
119 local_irq_restore(flags); 103 cris_atomic_restore(v, flags);
120 return retval; 104 return retval;
121} 105}
122extern __inline__ int atomic_dec_and_test(volatile atomic_t *v) 106extern __inline__ int atomic_dec_and_test(volatile atomic_t *v)
123{ 107{
124 int retval; 108 int retval;
125 unsigned long flags; 109 unsigned long flags;
126 local_save_flags(flags); 110 cris_atomic_save(v, flags);
127 local_irq_disable();
128 retval = --(v->counter) == 0; 111 retval = --(v->counter) == 0;
129 local_irq_restore(flags); 112 cris_atomic_restore(v, flags);
130 return retval; 113 return retval;
131} 114}
132 115
@@ -134,10 +117,9 @@ extern __inline__ int atomic_inc_and_test(volatile atomic_t *v)
134{ 117{
135 int retval; 118 int retval;
136 unsigned long flags; 119 unsigned long flags;
137 local_save_flags(flags); 120 cris_atomic_save(v, flags);
138 local_irq_disable();
139 retval = ++(v->counter) == 0; 121 retval = ++(v->counter) == 0;
140 local_irq_restore(flags); 122 cris_atomic_restore(v, flags);
141 return retval; 123 return retval;
142} 124}
143 125