| San Mehat | e20e134 | 2009-06-03 15:36:35 -0700 | [diff] [blame] | 1 | #ifndef BARRIER_H |
| 2 | #define BARRIER_H |
| 3 | |
| 4 | #if defined(__ia64__) |
| 5 | #define store_barrier() asm volatile ("mf" ::: "memory") |
| 6 | #elif defined(__x86_64__) |
| 7 | #define store_barrier() asm volatile("sfence" ::: "memory") |
| 8 | #elif defined(__i386__) |
| 9 | #define store_barrier() asm volatile ("": : :"memory") |
| 10 | #elif defined(__ppc__) || defined(__powerpc__) |
| 11 | #define store_barrier() asm volatile ("eieio" : : : "memory") |
| 12 | #elif defined(__s390__) || defined(__s390x__) |
| 13 | #define store_barrier() asm volatile ("bcr 15,0" : : : "memory") |
| 14 | #elif defined(__alpha__) |
| 15 | #define store_barrier() asm volatile("wmb": : :"memory") |
| 16 | #elif defined(__hppa__) |
| 17 | #define store_barrier() asm volatile("":::"memory") |
| 18 | #elif defined(__sparc__) |
| 19 | #define store_barrier() asm volatile("":::"memory") |
| 20 | #elif defined(__m68000__) || defined(__m68k__) || defined(mc68000) || defined(_M_M68K) |
| 21 | #define store_barrier() asm volatile("":::"memory") |
| 22 | #elif defined(__mips__) /* also mipsel */ |
| 23 | #define store_barrier() do { } while(0) |
| 24 | #elif defined(__arm__) |
| 25 | /* taken from linux/arch/arm/kernel/entry-armv.S, thanks to pbrook! */ |
| 26 | typedef void (__kernel_dmb_t)(void); |
| 27 | #define __kernel_dmb (*(__kernel_dmb_t *)0xffff0fa0) |
| 28 | #define store_barrier() __kernel_dmb() |
| 29 | #else |
| 30 | #error Define store_barrier() for your CPU |
| 31 | #endif |
| 32 | |
| 33 | #endif |