| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2014 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> |
| 3 | * |
| 4 | * This file is licensed under the terms of the GNU General Public License |
| 5 | * version 2. This program is licensed "as is" without any warranty of any |
| 6 | * kind, whether express or implied. |
| 7 | */ |
| 8 | |
| 9 | #ifndef __ASM_OPENRISC_BITOPS_ATOMIC_H |
| 10 | #define __ASM_OPENRISC_BITOPS_ATOMIC_H |
| 11 | |
| 12 | static inline void set_bit(int nr, volatile unsigned long *addr) |
| 13 | { |
| 14 | unsigned long mask = BIT_MASK(nr); |
| 15 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 16 | unsigned long tmp; |
| 17 | |
| 18 | __asm__ __volatile__( |
| 19 | "1: l.lwa %0,0(%1) \n" |
| 20 | " l.or %0,%0,%2 \n" |
| 21 | " l.swa 0(%1),%0 \n" |
| 22 | " l.bnf 1b \n" |
| 23 | " l.nop \n" |
| 24 | : "=&r"(tmp) |
| 25 | : "r"(p), "r"(mask) |
| 26 | : "cc", "memory"); |
| 27 | } |
| 28 | |
| 29 | static inline void clear_bit(int nr, volatile unsigned long *addr) |
| 30 | { |
| 31 | unsigned long mask = BIT_MASK(nr); |
| 32 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 33 | unsigned long tmp; |
| 34 | |
| 35 | __asm__ __volatile__( |
| 36 | "1: l.lwa %0,0(%1) \n" |
| 37 | " l.and %0,%0,%2 \n" |
| 38 | " l.swa 0(%1),%0 \n" |
| 39 | " l.bnf 1b \n" |
| 40 | " l.nop \n" |
| 41 | : "=&r"(tmp) |
| 42 | : "r"(p), "r"(~mask) |
| 43 | : "cc", "memory"); |
| 44 | } |
| 45 | |
| 46 | static inline void change_bit(int nr, volatile unsigned long *addr) |
| 47 | { |
| 48 | unsigned long mask = BIT_MASK(nr); |
| 49 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 50 | unsigned long tmp; |
| 51 | |
| 52 | __asm__ __volatile__( |
| 53 | "1: l.lwa %0,0(%1) \n" |
| 54 | " l.xor %0,%0,%2 \n" |
| 55 | " l.swa 0(%1),%0 \n" |
| 56 | " l.bnf 1b \n" |
| 57 | " l.nop \n" |
| 58 | : "=&r"(tmp) |
| 59 | : "r"(p), "r"(mask) |
| 60 | : "cc", "memory"); |
| 61 | } |
| 62 | |
| 63 | static inline int test_and_set_bit(int nr, volatile unsigned long *addr) |
| 64 | { |
| 65 | unsigned long mask = BIT_MASK(nr); |
| 66 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 67 | unsigned long old; |
| 68 | unsigned long tmp; |
| 69 | |
| 70 | __asm__ __volatile__( |
| 71 | "1: l.lwa %0,0(%2) \n" |
| 72 | " l.or %1,%0,%3 \n" |
| 73 | " l.swa 0(%2),%1 \n" |
| 74 | " l.bnf 1b \n" |
| 75 | " l.nop \n" |
| 76 | : "=&r"(old), "=&r"(tmp) |
| 77 | : "r"(p), "r"(mask) |
| 78 | : "cc", "memory"); |
| 79 | |
| 80 | return (old & mask) != 0; |
| 81 | } |
| 82 | |
| 83 | static inline int test_and_clear_bit(int nr, volatile unsigned long *addr) |
| 84 | { |
| 85 | unsigned long mask = BIT_MASK(nr); |
| 86 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 87 | unsigned long old; |
| 88 | unsigned long tmp; |
| 89 | |
| 90 | __asm__ __volatile__( |
| 91 | "1: l.lwa %0,0(%2) \n" |
| 92 | " l.and %1,%0,%3 \n" |
| 93 | " l.swa 0(%2),%1 \n" |
| 94 | " l.bnf 1b \n" |
| 95 | " l.nop \n" |
| 96 | : "=&r"(old), "=&r"(tmp) |
| 97 | : "r"(p), "r"(~mask) |
| 98 | : "cc", "memory"); |
| 99 | |
| 100 | return (old & mask) != 0; |
| 101 | } |
| 102 | |
| 103 | static inline int test_and_change_bit(int nr, volatile unsigned long *addr) |
| 104 | { |
| 105 | unsigned long mask = BIT_MASK(nr); |
| 106 | unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); |
| 107 | unsigned long old; |
| 108 | unsigned long tmp; |
| 109 | |
| 110 | __asm__ __volatile__( |
| 111 | "1: l.lwa %0,0(%2) \n" |
| 112 | " l.xor %1,%0,%3 \n" |
| 113 | " l.swa 0(%2),%1 \n" |
| 114 | " l.bnf 1b \n" |
| 115 | " l.nop \n" |
| 116 | : "=&r"(old), "=&r"(tmp) |
| 117 | : "r"(p), "r"(mask) |
| 118 | : "cc", "memory"); |
| 119 | |
| 120 | return (old & mask) != 0; |
| 121 | } |
| 122 | |
| 123 | #endif /* __ASM_OPENRISC_BITOPS_ATOMIC_H */ |