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| 29 | #ifndef __mips32_ATOMIC_H__ |
29 | #ifndef __mips32_ATOMIC_H__ |
| 30 | #define __mips32_ATOMIC_H__ |
30 | #define __mips32_ATOMIC_H__ |
| 31 | 31 | ||
| 32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
| - | 33 | #include <typedefs.h> |
|
| 33 | 34 | ||
| 34 | #define atomic_inc(x) ((void) atomic_add(x, 1)) |
35 | #define atomic_inc(x) ((void) atomic_add(x, 1)) |
| 35 | #define atomic_dec(x) ((void) atomic_add(x, -1)) |
36 | #define atomic_dec(x) ((void) atomic_add(x, -1)) |
| 36 | 37 | ||
| 37 | #define atomic_postinc(x) (atomic_add(x, 1) - 1) |
38 | #define atomic_postinc(x) (atomic_add(x, 1) - 1) |
| 38 | #define atomic_postdec(x) (atomic_add(x, -1) + 1) |
39 | #define atomic_postdec(x) (atomic_add(x, -1) + 1) |
| 39 | 40 | ||
| 40 | #define atomic_preinc(x) atomic_add(x, 1) |
41 | #define atomic_preinc(x) atomic_add(x, 1) |
| 41 | #define atomic_predec(x) atomic_add(x, -1) |
42 | #define atomic_predec(x) atomic_add(x, -1) |
| 42 | 43 | ||
| 43 | typedef struct { volatile __u32 count; } atomic_t; |
- | |
| 44 | - | ||
| 45 | /* Atomic addition of immediate value. |
44 | /* Atomic addition of immediate value. |
| 46 | * |
45 | * |
| 47 | * @param val Memory location to which will be the immediate value added. |
46 | * @param val Memory location to which will be the immediate value added. |
| 48 | * @param i Signed immediate that will be added to *val. |
47 | * @param i Signed immediate that will be added to *val. |
| 49 | * |
48 | * |
| 50 | * @return Value after addition. |
49 | * @return Value after addition. |
| 51 | */ |
50 | */ |
| 52 | static inline count_t atomic_add(atomic_t *val, int i) |
51 | static inline long atomic_add(atomic_t *val, int i) |
| 53 | { |
52 | { |
| 54 | count_t tmp, v; |
53 | long tmp, v; |
| 55 | 54 | ||
| 56 | __asm__ volatile ( |
55 | __asm__ volatile ( |
| 57 | "1:\n" |
56 | "1:\n" |
| 58 | " ll %0, %1\n" |
57 | " ll %0, %1\n" |
| 59 | " addiu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
58 | " addiu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
| Line 66... | Line 65... | ||
| 66 | ); |
65 | ); |
| 67 | 66 | ||
| 68 | return v; |
67 | return v; |
| 69 | } |
68 | } |
| 70 | 69 | ||
| 71 | /* Reads/writes are atomic on mips for 4-bytes */ |
- | |
| 72 | - | ||
| 73 | static inline void atomic_set(atomic_t *val, __u32 i) |
- | |
| 74 | { |
- | |
| 75 | val->count = i; |
- | |
| 76 | } |
- | |
| 77 | - | ||
| 78 | static inline __u32 atomic_get(atomic_t *val) |
- | |
| 79 | { |
- | |
| 80 | return val->count; |
- | |
| 81 | } |
- | |
| 82 | - | ||
| 83 | #endif |
70 | #endif |