| Paul Gortmaker | 5ba840f | 2012-04-02 16:04:13 -0400 | [diff] [blame] | 1 | #ifndef _ALPHA_CMPXCHG_H |
| 2 | #define _ALPHA_CMPXCHG_H |
| 3 | |
| 4 | /* |
| 5 | * Atomic exchange routines. |
| 6 | */ |
| 7 | |
| 8 | #define __ASM__MB |
| 9 | #define ____xchg(type, args...) __xchg ## type ## _local(args) |
| 10 | #define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args) |
| 11 | #include <asm/xchg.h> |
| 12 | |
| 13 | #define xchg_local(ptr, x) \ |
| 14 | ({ \ |
| 15 | __typeof__(*(ptr)) _x_ = (x); \ |
| 16 | (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \ |
| 17 | sizeof(*(ptr))); \ |
| 18 | }) |
| 19 | |
| 20 | #define cmpxchg_local(ptr, o, n) \ |
| 21 | ({ \ |
| 22 | __typeof__(*(ptr)) _o_ = (o); \ |
| 23 | __typeof__(*(ptr)) _n_ = (n); \ |
| 24 | (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ |
| 25 | (unsigned long)_n_, \ |
| 26 | sizeof(*(ptr))); \ |
| 27 | }) |
| 28 | |
| 29 | #define cmpxchg64_local(ptr, o, n) \ |
| 30 | ({ \ |
| 31 | BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ |
| 32 | cmpxchg_local((ptr), (o), (n)); \ |
| 33 | }) |
| 34 | |
| 35 | #ifdef CONFIG_SMP |
| 36 | #undef __ASM__MB |
| 37 | #define __ASM__MB "\tmb\n" |
| 38 | #endif |
| 39 | #undef ____xchg |
| 40 | #undef ____cmpxchg |
| 41 | #define ____xchg(type, args...) __xchg ##type(args) |
| 42 | #define ____cmpxchg(type, args...) __cmpxchg ##type(args) |
| 43 | #include <asm/xchg.h> |
| 44 | |
| 45 | #define xchg(ptr, x) \ |
| 46 | ({ \ |
| 47 | __typeof__(*(ptr)) _x_ = (x); \ |
| 48 | (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \ |
| 49 | sizeof(*(ptr))); \ |
| 50 | }) |
| 51 | |
| 52 | #define cmpxchg(ptr, o, n) \ |
| 53 | ({ \ |
| 54 | __typeof__(*(ptr)) _o_ = (o); \ |
| 55 | __typeof__(*(ptr)) _n_ = (n); \ |
| 56 | (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ |
| 57 | (unsigned long)_n_, sizeof(*(ptr)));\ |
| 58 | }) |
| 59 | |
| 60 | #define cmpxchg64(ptr, o, n) \ |
| 61 | ({ \ |
| 62 | BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ |
| 63 | cmpxchg((ptr), (o), (n)); \ |
| 64 | }) |
| 65 | |
| 66 | #undef __ASM__MB |
| 67 | #undef ____cmpxchg |
| 68 | |
| Paul Gortmaker | 5ba840f | 2012-04-02 16:04:13 -0400 | [diff] [blame] | 69 | #endif /* _ALPHA_CMPXCHG_H */ |