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