projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 6006c0d8 JH |
1 | #ifndef __ASM_METAG_BITOPS_H |
| 2 | #define __ASM_METAG_BITOPS_H | |
| 3 | ||
| 4 | #include <linux/compiler.h> | |
| 5 | #include <asm/barrier.h> | |
| 6 | #include <asm/global_lock.h> | |
| 7 | ||
| 8 | /* | |
| 9 | * clear_bit() doesn't provide any barrier for the compiler. | |
| 10 | */ | |
| 11 | #define smp_mb__before_clear_bit() barrier() | |
| 12 | #define smp_mb__after_clear_bit() barrier() | |
| 13 | ||
| 14 | #ifdef CONFIG_SMP | |
| 15 | /* | |
| 16 | * These functions are the basis of our bit ops. | |
| 17 | */ | |
| 18 | static inline void set_bit(unsigned int bit, volatile unsigned long *p) | |
| 19 | { | |
| 20 | unsigned long flags; | |
| 21 | unsigned long mask = 1UL << (bit & 31); | |
| 22 | ||
| 23 | p += bit >> 5; | |
| 24 | ||
| 25 | __global_lock1(flags); | |
| 26 | fence(); | |
| 27 | *p |= mask; | |
| 28 | __global_unlock1(flags); | |
| 29 | } | |
| 30 | ||
| 31 | static inline void clear_bit(unsigned int bit, volatile unsigned long *p) | |
| 32 | { | |
| 33 | unsigned long flags; | |
| 34 | unsigned long mask = 1UL << (bit & 31); | |
| 35 | ||
| 36 | p += bit >> 5; | |
| 37 | ||
| 38 | __global_lock1(flags); | |
| 39 | fence(); | |
| 40 | *p &= ~mask; | |
| 41 | __global_unlock1(flags); | |
| 42 | } | |
| 43 | ||
| 44 | static inline void change_bit(unsigned int bit, volatile unsigned long *p) | |
| 45 | { | |
| 46 | unsigned long flags; | |
| 47 | unsigned long mask = 1UL << (bit & 31); | |
| 48 | ||
| 49 | p += bit >> 5; | |
| 50 | ||
| 51 | __global_lock1(flags); | |
| 52 | fence(); | |
| 53 | *p ^= mask; | |
| 54 | __global_unlock1(flags); | |
| 55 | } | |
| 56 | ||
| 57 | static inline int test_and_set_bit(unsigned int bit, volatile unsigned long *p) | |
| 58 | { | |
| 59 | unsigned long flags; | |
| 60 | unsigned long old; | |
| 61 | unsigned long mask = 1UL << (bit & 31); | |
| 62 | ||
| 63 | p += bit >> 5; | |
| 64 | ||
| 65 | __global_lock1(flags); | |
| 66 | old = *p; | |
| 67 | if (!(old & mask)) { | |
| 68 | fence(); | |
| 69 | *p = old | mask; | |
| 70 | } | |
| 71 | __global_unlock1(flags); | |
| 72 | ||
| 73 | return (old & mask) != 0; | |
| 74 | } | |
| 75 | ||
| 76 | static inline int test_and_clear_bit(unsigned int bit, | |
| 77 | volatile unsigned long *p) | |
| 78 | { | |
| 79 | unsigned long flags; | |
| 80 | unsigned long old; | |
| 81 | unsigned long mask = 1UL << (bit & 31); | |
| 82 | ||
| 83 | p += bit >> 5; | |
| 84 | ||
| 85 | __global_lock1(flags); | |
| 86 | old = *p; | |
| 87 | if (old & mask) { | |
| 88 | fence(); | |
| 89 | *p = old & ~mask; | |
| 90 | } | |
| 91 | __global_unlock1(flags); | |
| 92 | ||
| 93 | return (old & mask) != 0; | |
| 94 | } | |
| 95 | ||
| 96 | static inline int test_and_change_bit(unsigned int bit, | |
| 97 | volatile unsigned long *p) | |
| 98 | { | |
| 99 | unsigned long flags; | |
| 100 | unsigned long old; | |
| 101 | unsigned long mask = 1UL << (bit & 31); | |
| 102 | ||
| 103 | p += bit >> 5; | |
| 104 | ||
| 105 | __global_lock1(flags); | |
| 106 | fence(); | |
| 107 | old = *p; | |
| 108 | *p = old ^ mask; | |
| 109 | __global_unlock1(flags); | |
| 110 | ||
| 111 | return (old & mask) != 0; | |
| 112 | } | |
| 113 | ||
| 114 | #else | |
| 115 | #include <asm-generic/bitops/atomic.h> | |
| 116 | #endif /* CONFIG_SMP */ | |
| 117 | ||
| 118 | #include <asm-generic/bitops/non-atomic.h> | |
| 119 | #include <asm-generic/bitops/find.h> | |
| 120 | #include <asm-generic/bitops/ffs.h> | |
| 121 | #include <asm-generic/bitops/__ffs.h> | |
| 122 | #include <asm-generic/bitops/ffz.h> | |
| 123 | #include <asm-generic/bitops/fls.h> | |
| 124 | #include <asm-generic/bitops/__fls.h> | |
| 125 | #include <asm-generic/bitops/fls64.h> | |
| 126 | #include <asm-generic/bitops/hweight.h> | |
| 127 | #include <asm-generic/bitops/lock.h> | |
| 128 | #include <asm-generic/bitops/sched.h> | |
| 129 | #include <asm-generic/bitops/le.h> | |
| 130 | #include <asm-generic/bitops/ext2-atomic.h> | |
| 131 | ||
| 132 | #endif /* __ASM_METAG_BITOPS_H */ |