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 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 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 44static inline void a_barrier() 45{ 46#if __mips < 2 47 /* mips2 sync, but using too many directives causes 48 * gcc not to inline it, so encode with .long instead. */ 49 __asm__ __volatile__ (".long 0xf" : : : "memory"); 50#else 51 __asm__ __volatile__ ("sync" : : : "memory"); 52#endif 53} 54 55#define a_pre_llsc a_barrier 56#define a_post_llsc a_barrier 57 58#undef LLSC_M 59