diff options
Diffstat (limited to 'include/asm-sparc64/bitops.h')
| -rw-r--r-- | include/asm-sparc64/bitops.h | 219 |
1 files changed, 13 insertions, 206 deletions
diff --git a/include/asm-sparc64/bitops.h b/include/asm-sparc64/bitops.h index 2361f8736498..71944b0f09de 100644 --- a/include/asm-sparc64/bitops.h +++ b/include/asm-sparc64/bitops.h | |||
| @@ -18,58 +18,7 @@ extern void set_bit(unsigned long nr, volatile unsigned long *addr); | |||
| 18 | extern void clear_bit(unsigned long nr, volatile unsigned long *addr); | 18 | extern void clear_bit(unsigned long nr, volatile unsigned long *addr); |
| 19 | extern void change_bit(unsigned long nr, volatile unsigned long *addr); | 19 | extern void change_bit(unsigned long nr, volatile unsigned long *addr); |
| 20 | 20 | ||
| 21 | /* "non-atomic" versions... */ | 21 | #include <asm-generic/bitops/non-atomic.h> |
| 22 | |||
| 23 | static inline void __set_bit(int nr, volatile unsigned long *addr) | ||
| 24 | { | ||
| 25 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 26 | |||
| 27 | *m |= (1UL << (nr & 63)); | ||
| 28 | } | ||
| 29 | |||
| 30 | static inline void __clear_bit(int nr, volatile unsigned long *addr) | ||
| 31 | { | ||
| 32 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 33 | |||
| 34 | *m &= ~(1UL << (nr & 63)); | ||
| 35 | } | ||
| 36 | |||
| 37 | static inline void __change_bit(int nr, volatile unsigned long *addr) | ||
| 38 | { | ||
| 39 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 40 | |||
| 41 | *m ^= (1UL << (nr & 63)); | ||
| 42 | } | ||
| 43 | |||
| 44 | static inline int __test_and_set_bit(int nr, volatile unsigned long *addr) | ||
| 45 | { | ||
| 46 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 47 | unsigned long old = *m; | ||
| 48 | unsigned long mask = (1UL << (nr & 63)); | ||
| 49 | |||
| 50 | *m = (old | mask); | ||
| 51 | return ((old & mask) != 0); | ||
| 52 | } | ||
| 53 | |||
| 54 | static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr) | ||
| 55 | { | ||
| 56 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 57 | unsigned long old = *m; | ||
| 58 | unsigned long mask = (1UL << (nr & 63)); | ||
| 59 | |||
| 60 | *m = (old & ~mask); | ||
| 61 | return ((old & mask) != 0); | ||
| 62 | } | ||
| 63 | |||
| 64 | static inline int __test_and_change_bit(int nr, volatile unsigned long *addr) | ||
| 65 | { | ||
| 66 | unsigned long *m = ((unsigned long *)addr) + (nr >> 6); | ||
| 67 | unsigned long old = *m; | ||
| 68 | unsigned long mask = (1UL << (nr & 63)); | ||
| 69 | |||
| 70 | *m = (old ^ mask); | ||
| 71 | return ((old & mask) != 0); | ||
| 72 | } | ||
| 73 | 22 | ||
| 74 | #ifdef CONFIG_SMP | 23 | #ifdef CONFIG_SMP |
| 75 | #define smp_mb__before_clear_bit() membar_storeload_loadload() | 24 | #define smp_mb__before_clear_bit() membar_storeload_loadload() |
| @@ -79,78 +28,15 @@ static inline int __test_and_change_bit(int nr, volatile unsigned long *addr) | |||
| 79 | #define smp_mb__after_clear_bit() barrier() | 28 | #define smp_mb__after_clear_bit() barrier() |
| 80 | #endif | 29 | #endif |
| 81 | 30 | ||
| 82 | static inline int test_bit(int nr, __const__ volatile unsigned long *addr) | 31 | #include <asm-generic/bitops/ffz.h> |
| 83 | { | 32 | #include <asm-generic/bitops/__ffs.h> |
| 84 | return (1UL & (addr[nr >> 6] >> (nr & 63))) != 0UL; | 33 | #include <asm-generic/bitops/fls.h> |
| 85 | } | 34 | #include <asm-generic/bitops/fls64.h> |
| 86 | |||
| 87 | /* The easy/cheese version for now. */ | ||
| 88 | static inline unsigned long ffz(unsigned long word) | ||
| 89 | { | ||
| 90 | unsigned long result; | ||
| 91 | |||
| 92 | result = 0; | ||
| 93 | while(word & 1) { | ||
| 94 | result++; | ||
| 95 | word >>= 1; | ||
| 96 | } | ||
| 97 | return result; | ||
| 98 | } | ||
| 99 | |||
| 100 | /** | ||
| 101 | * __ffs - find first bit in word. | ||
| 102 | * @word: The word to search | ||
| 103 | * | ||
| 104 | * Undefined if no bit exists, so code should check against 0 first. | ||
| 105 | */ | ||
| 106 | static inline unsigned long __ffs(unsigned long word) | ||
| 107 | { | ||
| 108 | unsigned long result = 0; | ||
| 109 | |||
| 110 | while (!(word & 1UL)) { | ||
| 111 | result++; | ||
| 112 | word >>= 1; | ||
| 113 | } | ||
| 114 | return result; | ||
| 115 | } | ||
| 116 | |||
| 117 | /* | ||
| 118 | * fls: find last bit set. | ||
| 119 | */ | ||
| 120 | |||
| 121 | #define fls(x) generic_fls(x) | ||
| 122 | #define fls64(x) generic_fls64(x) | ||
| 123 | 35 | ||
| 124 | #ifdef __KERNEL__ | 36 | #ifdef __KERNEL__ |
| 125 | 37 | ||
| 126 | /* | 38 | #include <asm-generic/bitops/sched.h> |
| 127 | * Every architecture must define this function. It's the fastest | 39 | #include <asm-generic/bitops/ffs.h> |
| 128 | * way of searching a 140-bit bitmap where the first 100 bits are | ||
| 129 | * unlikely to be set. It's guaranteed that at least one of the 140 | ||
| 130 | * bits is cleared. | ||
| 131 | */ | ||
| 132 | static inline int sched_find_first_bit(unsigned long *b) | ||
| 133 | { | ||
| 134 | if (unlikely(b[0])) | ||
| 135 | return __ffs(b[0]); | ||
| 136 | if (unlikely(((unsigned int)b[1]))) | ||
| 137 | return __ffs(b[1]) + 64; | ||
| 138 | if (b[1] >> 32) | ||
| 139 | return __ffs(b[1] >> 32) + 96; | ||
| 140 | return __ffs(b[2]) + 128; | ||
| 141 | } | ||
| 142 | |||
| 143 | /* | ||
| 144 | * ffs: find first bit set. This is defined the same way as | ||
| 145 | * the libc and compiler builtin ffs routines, therefore | ||
| 146 | * differs in spirit from the above ffz (man ffs). | ||
| 147 | */ | ||
| 148 | static inline int ffs(int x) | ||
| 149 | { | ||
| 150 | if (!x) | ||
| 151 | return 0; | ||
| 152 | return __ffs((unsigned long)x) + 1; | ||
| 153 | } | ||
| 154 | 40 | ||
| 155 | /* | 41 | /* |
| 156 | * hweightN: returns the hamming weight (i.e. the number | 42 | * hweightN: returns the hamming weight (i.e. the number |
| @@ -193,102 +79,23 @@ static inline unsigned int hweight8(unsigned int w) | |||
| 193 | 79 | ||
| 194 | #else | 80 | #else |
| 195 | 81 | ||
| 196 | #define hweight64(x) generic_hweight64(x) | 82 | #include <asm-generic/bitops/hweight.h> |
| 197 | #define hweight32(x) generic_hweight32(x) | ||
| 198 | #define hweight16(x) generic_hweight16(x) | ||
| 199 | #define hweight8(x) generic_hweight8(x) | ||
| 200 | 83 | ||
| 201 | #endif | 84 | #endif |
| 202 | #endif /* __KERNEL__ */ | 85 | #endif /* __KERNEL__ */ |
| 203 | 86 | ||
| 204 | /** | 87 | #include <asm-generic/bitops/find.h> |
| 205 | * find_next_bit - find the next set bit in a memory region | ||
| 206 | * @addr: The address to base the search on | ||
| 207 | * @offset: The bitnumber to start searching at | ||
| 208 | * @size: The maximum size to search | ||
| 209 | */ | ||
| 210 | extern unsigned long find_next_bit(const unsigned long *, unsigned long, | ||
| 211 | unsigned long); | ||
| 212 | |||
| 213 | /** | ||
| 214 | * find_first_bit - find the first set bit in a memory region | ||
| 215 | * @addr: The address to start the search at | ||
| 216 | * @size: The maximum size to search | ||
| 217 | * | ||
| 218 | * Returns the bit-number of the first set bit, not the number of the byte | ||
| 219 | * containing a bit. | ||
| 220 | */ | ||
| 221 | #define find_first_bit(addr, size) \ | ||
| 222 | find_next_bit((addr), (size), 0) | ||
| 223 | |||
| 224 | /* find_next_zero_bit() finds the first zero bit in a bit string of length | ||
| 225 | * 'size' bits, starting the search at bit 'offset'. This is largely based | ||
| 226 | * on Linus's ALPHA routines, which are pretty portable BTW. | ||
| 227 | */ | ||
| 228 | |||
| 229 | extern unsigned long find_next_zero_bit(const unsigned long *, | ||
| 230 | unsigned long, unsigned long); | ||
| 231 | |||
| 232 | #define find_first_zero_bit(addr, size) \ | ||
| 233 | find_next_zero_bit((addr), (size), 0) | ||
| 234 | |||
| 235 | #define test_and_set_le_bit(nr,addr) \ | ||
| 236 | test_and_set_bit((nr) ^ 0x38, (addr)) | ||
| 237 | #define test_and_clear_le_bit(nr,addr) \ | ||
| 238 | test_and_clear_bit((nr) ^ 0x38, (addr)) | ||
| 239 | |||
| 240 | static inline int test_le_bit(int nr, __const__ unsigned long * addr) | ||
| 241 | { | ||
| 242 | int mask; | ||
| 243 | __const__ unsigned char *ADDR = (__const__ unsigned char *) addr; | ||
| 244 | |||
| 245 | ADDR += nr >> 3; | ||
| 246 | mask = 1 << (nr & 0x07); | ||
| 247 | return ((mask & *ADDR) != 0); | ||
| 248 | } | ||
| 249 | |||
| 250 | #define find_first_zero_le_bit(addr, size) \ | ||
| 251 | find_next_zero_le_bit((addr), (size), 0) | ||
| 252 | |||
| 253 | extern unsigned long find_next_zero_le_bit(unsigned long *, unsigned long, unsigned long); | ||
| 254 | 88 | ||
| 255 | #ifdef __KERNEL__ | 89 | #ifdef __KERNEL__ |
| 256 | 90 | ||
| 257 | #define __set_le_bit(nr, addr) \ | 91 | #include <asm-generic/bitops/ext2-non-atomic.h> |
| 258 | __set_bit((nr) ^ 0x38, (addr)) | ||
| 259 | #define __clear_le_bit(nr, addr) \ | ||
| 260 | __clear_bit((nr) ^ 0x38, (addr)) | ||
| 261 | #define __test_and_clear_le_bit(nr, addr) \ | ||
| 262 | __test_and_clear_bit((nr) ^ 0x38, (addr)) | ||
| 263 | #define __test_and_set_le_bit(nr, addr) \ | ||
| 264 | __test_and_set_bit((nr) ^ 0x38, (addr)) | ||
| 265 | 92 | ||
| 266 | #define ext2_set_bit(nr,addr) \ | ||
| 267 | __test_and_set_le_bit((nr),(unsigned long *)(addr)) | ||
| 268 | #define ext2_set_bit_atomic(lock,nr,addr) \ | 93 | #define ext2_set_bit_atomic(lock,nr,addr) \ |
| 269 | test_and_set_le_bit((nr),(unsigned long *)(addr)) | 94 | test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr)) |
| 270 | #define ext2_clear_bit(nr,addr) \ | ||
| 271 | __test_and_clear_le_bit((nr),(unsigned long *)(addr)) | ||
| 272 | #define ext2_clear_bit_atomic(lock,nr,addr) \ | 95 | #define ext2_clear_bit_atomic(lock,nr,addr) \ |
| 273 | test_and_clear_le_bit((nr),(unsigned long *)(addr)) | 96 | test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr)) |
| 274 | #define ext2_test_bit(nr,addr) \ | ||
| 275 | test_le_bit((nr),(unsigned long *)(addr)) | ||
| 276 | #define ext2_find_first_zero_bit(addr, size) \ | ||
| 277 | find_first_zero_le_bit((unsigned long *)(addr), (size)) | ||
| 278 | #define ext2_find_next_zero_bit(addr, size, off) \ | ||
| 279 | find_next_zero_le_bit((unsigned long *)(addr), (size), (off)) | ||
| 280 | 97 | ||
| 281 | /* Bitmap functions for the minix filesystem. */ | 98 | #include <asm-generic/bitops/minix.h> |
| 282 | #define minix_test_and_set_bit(nr,addr) \ | ||
| 283 | __test_and_set_bit((nr),(unsigned long *)(addr)) | ||
| 284 | #define minix_set_bit(nr,addr) \ | ||
| 285 | __set_bit((nr),(unsigned long *)(addr)) | ||
| 286 | #define minix_test_and_clear_bit(nr,addr) \ | ||
| 287 | __test_and_clear_bit((nr),(unsigned long *)(addr)) | ||
| 288 | #define minix_test_bit(nr,addr) \ | ||
| 289 | test_bit((nr),(unsigned long *)(addr)) | ||
| 290 | #define minix_find_first_zero_bit(addr,size) \ | ||
| 291 | find_first_zero_bit((unsigned long *)(addr),(size)) | ||
| 292 | 99 | ||
| 293 | #endif /* __KERNEL__ */ | 100 | #endif /* __KERNEL__ */ |
| 294 | 101 | ||
