projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 6006c0d8 JH |
2 | #ifndef __ASM_METAG_BITOPS_H |
| 3 | #define __ASM_METAG_BITOPS_H | |
| 4 | ||
| 5 | #include <linux/compiler.h> | |
| 6 | #include <asm/barrier.h> | |
| 7 | #include <asm/global_lock.h> | |
| 8 | ||
| 6006c0d8 JH |
9 | #ifdef CONFIG_SMP |
| 10 | /* | |
| 11 | * These functions are the basis of our bit ops. | |
| 12 | */ | |
| 13 | static inline void set_bit(unsigned int bit, volatile unsigned long *p) | |
| 14 | { | |
| 15 | unsigned long flags; | |
| 16 | unsigned long mask = 1UL << (bit & 31); | |
| 17 | ||
| 18 | p += bit >> 5; | |
| 19 | ||
| 20 | __global_lock1(flags); | |
| 21 | fence(); | |
| 22 | *p |= mask; | |
| 23 | __global_unlock1(flags); | |
| 24 | } | |
| 25 | ||
| 26 | static inline void clear_bit(unsigned int bit, volatile unsigned long *p) | |
| 27 | { | |
| 28 | unsigned long flags; | |
| 29 | unsigned long mask = 1UL << (bit & 31); | |
| 30 | ||
| 31 | p += bit >> 5; | |
| 32 | ||
| 33 | __global_lock1(flags); | |
| 34 | fence(); | |
| 35 | *p &= ~mask; | |
| 36 | __global_unlock1(flags); | |
| 37 | } | |
| 38 | ||
| 39 | static inline void change_bit(unsigned int bit, volatile unsigned long *p) | |
| 40 | { | |
| 41 | unsigned long flags; | |
| 42 | unsigned long mask = 1UL << (bit & 31); | |
| 43 | ||
| 44 | p += bit >> 5; | |
| 45 | ||
| 46 | __global_lock1(flags); | |
| 47 | fence(); | |
| 48 | *p ^= mask; | |
| 49 | __global_unlock1(flags); | |
| 50 | } | |
| 51 | ||
| 52 | static inline int test_and_set_bit(unsigned int bit, volatile unsigned long *p) | |
| 53 | { | |
| 54 | unsigned long flags; | |
| 55 | unsigned long old; | |
| 56 | unsigned long mask = 1UL << (bit & 31); | |
| 57 | ||
| 58 | p += bit >> 5; | |
| 59 | ||
| 60 | __global_lock1(flags); | |
| 61 | old = *p; | |
| 62 | if (!(old & mask)) { | |
| 63 | fence(); | |
| 64 | *p = old | mask; | |
| 65 | } | |
| 66 | __global_unlock1(flags); | |
| 67 | ||
| 68 | return (old & mask) != 0; | |
| 69 | } | |
| 70 | ||
| 71 | static inline int test_and_clear_bit(unsigned int bit, | |
| 72 | volatile unsigned long *p) | |
| 73 | { | |
| 74 | unsigned long flags; | |
| 75 | unsigned long old; | |
| 76 | unsigned long mask = 1UL << (bit & 31); | |
| 77 | ||
| 78 | p += bit >> 5; | |
| 79 | ||
| 80 | __global_lock1(flags); | |
| 81 | old = *p; | |
| 82 | if (old & mask) { | |
| 83 | fence(); | |
| 84 | *p = old & ~mask; | |
| 85 | } | |
| 86 | __global_unlock1(flags); | |
| 87 | ||
| 88 | return (old & mask) != 0; | |
| 89 | } | |
| 90 | ||
| 91 | static inline int test_and_change_bit(unsigned int bit, | |
| 92 | volatile unsigned long *p) | |
| 93 | { | |
| 94 | unsigned long flags; | |
| 95 | unsigned long old; | |
| 96 | unsigned long mask = 1UL << (bit & 31); | |
| 97 | ||
| 98 | p += bit >> 5; | |
| 99 | ||
| 100 | __global_lock1(flags); | |
| 101 | fence(); | |
| 102 | old = *p; | |
| 103 | *p = old ^ mask; | |
| 104 | __global_unlock1(flags); | |
| 105 | ||
| 106 | return (old & mask) != 0; | |
| 107 | } | |
| 108 | ||
| 109 | #else | |
| 110 | #include <asm-generic/bitops/atomic.h> | |
| 111 | #endif /* CONFIG_SMP */ | |
| 112 | ||
| 113 | #include <asm-generic/bitops/non-atomic.h> | |
| 114 | #include <asm-generic/bitops/find.h> | |
| 115 | #include <asm-generic/bitops/ffs.h> | |
| 116 | #include <asm-generic/bitops/__ffs.h> | |
| 117 | #include <asm-generic/bitops/ffz.h> | |
| 118 | #include <asm-generic/bitops/fls.h> | |
| 119 | #include <asm-generic/bitops/__fls.h> | |
| 120 | #include <asm-generic/bitops/fls64.h> | |
| 121 | #include <asm-generic/bitops/hweight.h> | |
| 122 | #include <asm-generic/bitops/lock.h> | |
| 123 | #include <asm-generic/bitops/sched.h> | |
| 124 | #include <asm-generic/bitops/le.h> | |
| 125 | #include <asm-generic/bitops/ext2-atomic.h> | |
| 126 | ||
| 127 | #endif /* __ASM_METAG_BITOPS_H */ |