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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | |
| 3 | #ifndef __ASM_CSKY_CMPXCHG_H |
| 4 | #define __ASM_CSKY_CMPXCHG_H |
| 5 | |
| 6 | #ifdef CONFIG_SMP |
| 7 | #include <linux/bug.h> |
| 8 | #include <asm/barrier.h> |
| 9 | |
| 10 | #define __xchg_relaxed(new, ptr, size) \ |
| 11 | ({ \ |
| 12 | __typeof__(ptr) __ptr = (ptr); \ |
| 13 | __typeof__(new) __new = (new); \ |
| 14 | __typeof__(*(ptr)) __ret; \ |
| 15 | unsigned long tmp; \ |
| 16 | switch (size) { \ |
| 17 | case 2: { \ |
| 18 | u32 ret; \ |
| 19 | u32 shif = ((ulong)__ptr & 2) ? 16 : 0; \ |
| 20 | u32 mask = 0xffff << shif; \ |
| 21 | __ptr = (__typeof__(ptr))((ulong)__ptr & ~2); \ |
| 22 | __asm__ __volatile__ ( \ |
| 23 | "1: ldex.w %0, (%4)\n" \ |
| 24 | " and %1, %0, %2\n" \ |
| 25 | " or %1, %1, %3\n" \ |
| 26 | " stex.w %1, (%4)\n" \ |
| 27 | " bez %1, 1b\n" \ |
| 28 | : "=&r" (ret), "=&r" (tmp) \ |
| 29 | : "r" (~mask), \ |
| 30 | "r" ((u32)__new << shif), \ |
| 31 | "r" (__ptr) \ |
| 32 | : "memory"); \ |
| 33 | __ret = (__typeof__(*(ptr))) \ |
| 34 | ((ret & mask) >> shif); \ |
| 35 | break; \ |
| 36 | } \ |
| 37 | case 4: \ |
| 38 | asm volatile ( \ |
| 39 | "1: ldex.w %0, (%3) \n" \ |
| 40 | " mov %1, %2 \n" \ |
| 41 | " stex.w %1, (%3) \n" \ |
| 42 | " bez %1, 1b \n" \ |
| 43 | : "=&r" (__ret), "=&r" (tmp) \ |
| 44 | : "r" (__new), "r"(__ptr) \ |
| 45 | :); \ |
| 46 | break; \ |
| 47 | default: \ |
| 48 | BUILD_BUG(); \ |
| 49 | } \ |
| 50 | __ret; \ |
| 51 | }) |
| 52 | |
| 53 | #define arch_xchg_relaxed(ptr, x) \ |
| 54 | (__xchg_relaxed((x), (ptr), sizeof(*(ptr)))) |
| 55 | |
| 56 | #define __cmpxchg_relaxed(ptr, old, new, size) \ |
| 57 | ({ \ |
| 58 | __typeof__(ptr) __ptr = (ptr); \ |
| 59 | __typeof__(new) __new = (new); \ |
| 60 | __typeof__(new) __tmp; \ |
| 61 | __typeof__(old) __old = (old); \ |
| 62 | __typeof__(*(ptr)) __ret; \ |
| 63 | switch (size) { \ |
| 64 | case 4: \ |
| 65 | asm volatile ( \ |
| 66 | "1: ldex.w %0, (%3) \n" \ |
| 67 | " cmpne %0, %4 \n" \ |
| 68 | " bt 2f \n" \ |
| 69 | " mov %1, %2 \n" \ |
| 70 | " stex.w %1, (%3) \n" \ |
| 71 | " bez %1, 1b \n" \ |
| 72 | "2: \n" \ |
| 73 | : "=&r" (__ret), "=&r" (__tmp) \ |
| 74 | : "r" (__new), "r"(__ptr), "r"(__old) \ |
| 75 | :); \ |
| 76 | break; \ |
| 77 | default: \ |
| 78 | BUILD_BUG(); \ |
| 79 | } \ |
| 80 | __ret; \ |
| 81 | }) |
| 82 | |
| 83 | #define arch_cmpxchg_relaxed(ptr, o, n) \ |
| 84 | (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) |
| 85 | |
| 86 | #define __cmpxchg_acquire(ptr, old, new, size) \ |
| 87 | ({ \ |
| 88 | __typeof__(ptr) __ptr = (ptr); \ |
| 89 | __typeof__(new) __new = (new); \ |
| 90 | __typeof__(new) __tmp; \ |
| 91 | __typeof__(old) __old = (old); \ |
| 92 | __typeof__(*(ptr)) __ret; \ |
| 93 | switch (size) { \ |
| 94 | case 4: \ |
| 95 | asm volatile ( \ |
| 96 | "1: ldex.w %0, (%3) \n" \ |
| 97 | " cmpne %0, %4 \n" \ |
| 98 | " bt 2f \n" \ |
| 99 | " mov %1, %2 \n" \ |
| 100 | " stex.w %1, (%3) \n" \ |
| 101 | " bez %1, 1b \n" \ |
| 102 | ACQUIRE_FENCE \ |
| 103 | "2: \n" \ |
| 104 | : "=&r" (__ret), "=&r" (__tmp) \ |
| 105 | : "r" (__new), "r"(__ptr), "r"(__old) \ |
| 106 | :); \ |
| 107 | break; \ |
| 108 | default: \ |
| 109 | BUILD_BUG(); \ |
| 110 | } \ |
| 111 | __ret; \ |
| 112 | }) |
| 113 | |
| 114 | #define arch_cmpxchg_acquire(ptr, o, n) \ |
| 115 | (__cmpxchg_acquire((ptr), (o), (n), sizeof(*(ptr)))) |
| 116 | |
| 117 | #define __cmpxchg(ptr, old, new, size) \ |
| 118 | ({ \ |
| 119 | __typeof__(ptr) __ptr = (ptr); \ |
| 120 | __typeof__(new) __new = (new); \ |
| 121 | __typeof__(new) __tmp; \ |
| 122 | __typeof__(old) __old = (old); \ |
| 123 | __typeof__(*(ptr)) __ret; \ |
| 124 | switch (size) { \ |
| 125 | case 4: \ |
| 126 | asm volatile ( \ |
| 127 | RELEASE_FENCE \ |
| 128 | "1: ldex.w %0, (%3) \n" \ |
| 129 | " cmpne %0, %4 \n" \ |
| 130 | " bt 2f \n" \ |
| 131 | " mov %1, %2 \n" \ |
| 132 | " stex.w %1, (%3) \n" \ |
| 133 | " bez %1, 1b \n" \ |
| 134 | FULL_FENCE \ |
| 135 | "2: \n" \ |
| 136 | : "=&r" (__ret), "=&r" (__tmp) \ |
| 137 | : "r" (__new), "r"(__ptr), "r"(__old) \ |
| 138 | :); \ |
| 139 | break; \ |
| 140 | default: \ |
| 141 | BUILD_BUG(); \ |
| 142 | } \ |
| 143 | __ret; \ |
| 144 | }) |
| 145 | |
| 146 | #define arch_cmpxchg(ptr, o, n) \ |
| 147 | (__cmpxchg((ptr), (o), (n), sizeof(*(ptr)))) |
| 148 | |
| 149 | #define arch_cmpxchg_local(ptr, o, n) \ |
| 150 | (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) |
| 151 | #else |
| 152 | #include <asm-generic/cmpxchg.h> |
| 153 | #endif |
| 154 | |
| 155 | #endif /* __ASM_CSKY_CMPXCHG_H */ |
| 156 |
Warning: That file was not part of the compilation database. It may have many parsing errors.