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#ifndef __CR_ATOMIC_H__ | ||
#define __CR_ATOMIC_H__ | ||
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typedef uint32_t atomic_t; | ||
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#define atomic_get(v) (*(volatile int *)v) | ||
#define atomic_set(v, i) (*(v) = (i)) | ||
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static inline int __atomic_add(int i, atomic_t *v) | ||
{ | ||
int result; | ||
asm volatile("amadd_db.w %1, %2, %0" : "+ZB"(*v), "=&r"(result) : "r"(i) : "memory"); | ||
return result + i; | ||
} | ||
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static inline void atomic_add(int i, atomic_t *v) | ||
{ | ||
__atomic_add(i, v); | ||
} | ||
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static inline int atomic_add_return(int i, atomic_t *v) | ||
{ | ||
return __atomic_add(i, v); | ||
} | ||
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#define atomic_sub(i, v) atomic_add(-(int)i, v) | ||
#define atomic_sub_return(i, v) atomic_add_return(-(int)i, v) | ||
#define atomic_inc(v) atomic_add_return(1, v) | ||
#define atomic_dec(v) atomic_sub_return(1, v) | ||
#define atomic_dec_return(v) atomic_sub_return(1, v) | ||
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static inline int atomic_cmpxchg(atomic_t *ptr, int old, int new) | ||
{ | ||
int ret; | ||
asm volatile("1: \n" | ||
" ll.w %0, %1 \n" | ||
" bne %0, %2, 2f \n" | ||
" or $t0, %3, $zero \n" | ||
" sc.w $t0, %1 \n" | ||
" beqz $t0, 1b \n" | ||
"2: \n" | ||
" dbar 0 \n" | ||
: "=&r"(ret), "+ZB"(*ptr) | ||
: "r"(old), "r"(new) | ||
: "t0", "memory"); | ||
return ret; | ||
} | ||
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#endif /* __CR_ATOMIC_H__ */ |
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