1 #if __mips_isa_rev < 6 2 #define LLSC_M "m" 3 #else 4 #define LLSC_M "ZC" 5 #endif 6 7 #define a_ll a_ll a_ll(volatile int * p)8static inline int a_ll(volatile int *p) 9 { 10 int v; 11 #if __mips < 2 12 __asm__ __volatile__ ( 13 ".set push ; .set mips2\n\t" 14 "ll %0, %1" 15 "\n\t.set pop" 16 : "=r"(v) : "m"(*p)); 17 #else 18 __asm__ __volatile__ ( 19 "ll %0, %1" 20 : "=r"(v) : LLSC_M(*p)); 21 #endif 22 return v; 23 } 24 25 #define a_sc a_sc a_sc(volatile int * p,int v)26static inline int a_sc(volatile int *p, int v) 27 { 28 int r; 29 #if __mips < 2 30 __asm__ __volatile__ ( 31 ".set push ; .set mips2\n\t" 32 "sc %0, %1" 33 "\n\t.set pop" 34 : "=r"(r), "=m"(*p) : "0"(v) : "memory"); 35 #else 36 __asm__ __volatile__ ( 37 "sc %0, %1" 38 : "=r"(r), "="LLSC_M(*p) : "0"(v) : "memory"); 39 #endif 40 return r; 41 } 42 43 #define a_barrier a_barrier a_barrier()44static inline void a_barrier() 45 { 46 __asm__ __volatile__ ("sync" : : : "memory"); 47 } 48 49 #define a_pre_llsc a_barrier 50 #define a_post_llsc a_barrier 51 52 #undef LLSC_M 53