Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* * PowerPC atomic operations */ #ifndef _ASM_PPC_ATOMIC_H_ #define _ASM_PPC_ATOMIC_H_ #ifdef __SMP__ typedef struct { volatile int counter; } atomic_t; #else typedef struct { int counter; } atomic_t; #endif #define ATOMIC_INIT(i) { (i) } #define atomic_read(v) ((v)->counter) #define atomic_set(v,i) (((v)->counter) = (i)) extern void atomic_add(int a, atomic_t *v); extern int atomic_add_return(int a, atomic_t *v); extern void atomic_sub(int a, atomic_t *v); extern void atomic_inc(atomic_t *v); extern int atomic_inc_return(atomic_t *v); extern void atomic_dec(atomic_t *v); extern int atomic_dec_return(atomic_t *v); extern int atomic_dec_and_test(atomic_t *v); extern void atomic_clear_mask(unsigned long mask, unsigned long *addr); extern void atomic_set_mask(unsigned long mask, unsigned long *addr); #if 0 /* for now */ extern __inline__ void atomic_add(atomic_t a, atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%3\n\ add %0,%2,%0\n\ stwcx. %0,0,%3\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (a), "r" (v) : "cc"); } extern __inline__ void atomic_sub(atomic_t a, atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%3\n\ subf %0,%2,%0\n\ stwcx. %0,0,%3\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (a), "r" (v) : "cc"); } extern __inline__ int atomic_sub_and_test(atomic_t a, atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%3\n\ subf %0,%2,%0\n\ stwcx. %0,0,%3\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (a), "r" (v) : "cc"); return t == 0; } extern __inline__ void atomic_inc(atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%2\n\ addic %0,%0,1\n\ stwcx. %0,0,%2\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (v) : "cc"); } extern __inline__ void atomic_dec(atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%2\n\ addic %0,%0,-1\n\ stwcx. %0,0,%2\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (v) : "cc"); } extern __inline__ int atomic_dec_and_test(atomic_t *v) { atomic_t t; __asm__ __volatile__("\n\ 1: lwarx %0,0,%2\n\ addic %0,%0,-1\n\ stwcx. %0,0,%2\n\ bne 1b" : "=&r" (t), "=m" (*v) : "r" (v) : "cc"); return t == 0; } #endif /* 0 */ #endif /* _ASM_PPC_ATOMIC_H_ */ |