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| 67 | |
67 | |
| 68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
| 69 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
69 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
| 70 | |
70 | |
| 71 | #if ECB_NO_THREADS || ECB_NO_SMP |
71 | #if ECB_NO_THREADS || ECB_NO_SMP |
| 72 | #define ECB_MEMORY_FENCE do { } while (0) |
72 | #define ECB_MEMORY_FENCE do { } while (0) |
| 73 | #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) |
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| 74 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) |
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| 75 | #endif |
73 | #endif |
| 76 | |
74 | |
| 77 | #ifndef ECB_MEMORY_FENCE |
75 | #ifndef ECB_MEMORY_FENCE |
| 78 | #if ECB_GCC_VERSION(2,5) |
76 | #if ECB_GCC_VERSION(2,5) |
| 79 | #if __x86 |
77 | #if __x86 |
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| 82 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
80 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
| 83 | #elif __amd64 |
81 | #elif __amd64 |
| 84 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
82 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
| 85 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
83 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
| 86 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
84 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
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85 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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86 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
| 87 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
87 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
| 88 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ |
88 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) |
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89 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
| 89 | || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
90 | #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
| 90 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
91 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
| 91 | #define ECB_MEMORY_FENCE \ |
92 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
| 92 | do { \ |
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| 93 | int null = 0; \ |
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| 94 | __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \ |
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| 95 | while (0) |
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| 96 | #endif |
93 | #endif |
| 97 | #endif |
94 | #endif |
| 98 | #endif |
95 | #endif |
| 99 | |
96 | |
| 100 | #ifndef ECB_MEMORY_FENCE |
97 | #ifndef ECB_MEMORY_FENCE |
