diff options
Diffstat (limited to 'include/asm-cris/bitops.h')
-rw-r--r-- | include/asm-cris/bitops.h | 234 |
1 files changed, 8 insertions, 226 deletions
diff --git a/include/asm-cris/bitops.h b/include/asm-cris/bitops.h index b1fca1fd8a5f..a569065113d9 100644 --- a/include/asm-cris/bitops.h +++ b/include/asm-cris/bitops.h | |||
@@ -39,8 +39,6 @@ struct __dummy { unsigned long a[100]; }; | |||
39 | 39 | ||
40 | #define set_bit(nr, addr) (void)test_and_set_bit(nr, addr) | 40 | #define set_bit(nr, addr) (void)test_and_set_bit(nr, addr) |
41 | 41 | ||
42 | #define __set_bit(nr, addr) (void)__test_and_set_bit(nr, addr) | ||
43 | |||
44 | /* | 42 | /* |
45 | * clear_bit - Clears a bit in memory | 43 | * clear_bit - Clears a bit in memory |
46 | * @nr: Bit to clear | 44 | * @nr: Bit to clear |
@@ -54,8 +52,6 @@ struct __dummy { unsigned long a[100]; }; | |||
54 | 52 | ||
55 | #define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr) | 53 | #define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr) |
56 | 54 | ||
57 | #define __clear_bit(nr, addr) (void)__test_and_clear_bit(nr, addr) | ||
58 | |||
59 | /* | 55 | /* |
60 | * change_bit - Toggle a bit in memory | 56 | * change_bit - Toggle a bit in memory |
61 | * @nr: Bit to change | 57 | * @nr: Bit to change |
@@ -68,18 +64,6 @@ struct __dummy { unsigned long a[100]; }; | |||
68 | 64 | ||
69 | #define change_bit(nr, addr) (void)test_and_change_bit(nr, addr) | 65 | #define change_bit(nr, addr) (void)test_and_change_bit(nr, addr) |
70 | 66 | ||
71 | /* | ||
72 | * __change_bit - Toggle a bit in memory | ||
73 | * @nr: the bit to change | ||
74 | * @addr: the address to start counting from | ||
75 | * | ||
76 | * Unlike change_bit(), this function is non-atomic and may be reordered. | ||
77 | * If it's called on the same region of memory simultaneously, the effect | ||
78 | * may be that only one operation succeeds. | ||
79 | */ | ||
80 | |||
81 | #define __change_bit(nr, addr) (void)__test_and_change_bit(nr, addr) | ||
82 | |||
83 | /** | 67 | /** |
84 | * test_and_set_bit - Set a bit and return its old value | 68 | * test_and_set_bit - Set a bit and return its old value |
85 | * @nr: Bit to set | 69 | * @nr: Bit to set |
@@ -104,18 +88,6 @@ static inline int test_and_set_bit(int nr, volatile unsigned long *addr) | |||
104 | return retval; | 88 | return retval; |
105 | } | 89 | } |
106 | 90 | ||
107 | static inline int __test_and_set_bit(int nr, volatile unsigned long *addr) | ||
108 | { | ||
109 | unsigned int mask, retval; | ||
110 | unsigned int *adr = (unsigned int *)addr; | ||
111 | |||
112 | adr += nr >> 5; | ||
113 | mask = 1 << (nr & 0x1f); | ||
114 | retval = (mask & *adr) != 0; | ||
115 | *adr |= mask; | ||
116 | return retval; | ||
117 | } | ||
118 | |||
119 | /* | 91 | /* |
120 | * clear_bit() doesn't provide any barrier for the compiler. | 92 | * clear_bit() doesn't provide any barrier for the compiler. |
121 | */ | 93 | */ |
@@ -147,27 +119,6 @@ static inline int test_and_clear_bit(int nr, volatile unsigned long *addr) | |||
147 | } | 119 | } |
148 | 120 | ||
149 | /** | 121 | /** |
150 | * __test_and_clear_bit - Clear a bit and return its old value | ||
151 | * @nr: Bit to clear | ||
152 | * @addr: Address to count from | ||
153 | * | ||
154 | * This operation is non-atomic and can be reordered. | ||
155 | * If two examples of this operation race, one can appear to succeed | ||
156 | * but actually fail. You must protect multiple accesses with a lock. | ||
157 | */ | ||
158 | |||
159 | static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr) | ||
160 | { | ||
161 | unsigned int mask, retval; | ||
162 | unsigned int *adr = (unsigned int *)addr; | ||
163 | |||
164 | adr += nr >> 5; | ||
165 | mask = 1 << (nr & 0x1f); | ||
166 | retval = (mask & *adr) != 0; | ||
167 | *adr &= ~mask; | ||
168 | return retval; | ||
169 | } | ||
170 | /** | ||
171 | * test_and_change_bit - Change a bit and return its old value | 122 | * test_and_change_bit - Change a bit and return its old value |
172 | * @nr: Bit to change | 123 | * @nr: Bit to change |
173 | * @addr: Address to count from | 124 | * @addr: Address to count from |
@@ -190,42 +141,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr) | |||
190 | return retval; | 141 | return retval; |
191 | } | 142 | } |
192 | 143 | ||
193 | /* WARNING: non atomic and it can be reordered! */ | 144 | #include <asm-generic/bitops/non-atomic.h> |
194 | |||
195 | static inline int __test_and_change_bit(int nr, volatile unsigned long *addr) | ||
196 | { | ||
197 | unsigned int mask, retval; | ||
198 | unsigned int *adr = (unsigned int *)addr; | ||
199 | |||
200 | adr += nr >> 5; | ||
201 | mask = 1 << (nr & 0x1f); | ||
202 | retval = (mask & *adr) != 0; | ||
203 | *adr ^= mask; | ||
204 | |||
205 | return retval; | ||
206 | } | ||
207 | |||
208 | /** | ||
209 | * test_bit - Determine whether a bit is set | ||
210 | * @nr: bit number to test | ||
211 | * @addr: Address to start counting from | ||
212 | * | ||
213 | * This routine doesn't need to be atomic. | ||
214 | */ | ||
215 | |||
216 | static inline int test_bit(int nr, const volatile unsigned long *addr) | ||
217 | { | ||
218 | unsigned int mask; | ||
219 | unsigned int *adr = (unsigned int *)addr; | ||
220 | |||
221 | adr += nr >> 5; | ||
222 | mask = 1 << (nr & 0x1f); | ||
223 | return ((mask & *adr) != 0); | ||
224 | } | ||
225 | |||
226 | /* | ||
227 | * Find-bit routines.. | ||
228 | */ | ||
229 | 145 | ||
230 | /* | 146 | /* |
231 | * Since we define it "external", it collides with the built-in | 147 | * Since we define it "external", it collides with the built-in |
@@ -234,152 +150,18 @@ static inline int test_bit(int nr, const volatile unsigned long *addr) | |||
234 | */ | 150 | */ |
235 | #define ffs kernel_ffs | 151 | #define ffs kernel_ffs |
236 | 152 | ||
237 | /* | 153 | #include <asm-generic/bitops/fls.h> |
238 | * fls: find last bit set. | 154 | #include <asm-generic/bitops/fls64.h> |
239 | */ | 155 | #include <asm-generic/bitops/hweight.h> |
240 | 156 | #include <asm-generic/bitops/find.h> | |
241 | #define fls(x) generic_fls(x) | ||
242 | #define fls64(x) generic_fls64(x) | ||
243 | |||
244 | /* | ||
245 | * hweightN - returns the hamming weight of a N-bit word | ||
246 | * @x: the word to weigh | ||
247 | * | ||
248 | * The Hamming Weight of a number is the total number of bits set in it. | ||
249 | */ | ||
250 | 157 | ||
251 | #define hweight32(x) generic_hweight32(x) | 158 | #include <asm-generic/bitops/ext2-non-atomic.h> |
252 | #define hweight16(x) generic_hweight16(x) | ||
253 | #define hweight8(x) generic_hweight8(x) | ||
254 | 159 | ||
255 | /** | ||
256 | * find_next_zero_bit - find the first zero bit in a memory region | ||
257 | * @addr: The address to base the search on | ||
258 | * @offset: The bitnumber to start searching at | ||
259 | * @size: The maximum size to search | ||
260 | */ | ||
261 | static inline int find_next_zero_bit (const unsigned long * addr, int size, int offset) | ||
262 | { | ||
263 | unsigned long *p = ((unsigned long *) addr) + (offset >> 5); | ||
264 | unsigned long result = offset & ~31UL; | ||
265 | unsigned long tmp; | ||
266 | |||
267 | if (offset >= size) | ||
268 | return size; | ||
269 | size -= result; | ||
270 | offset &= 31UL; | ||
271 | if (offset) { | ||
272 | tmp = *(p++); | ||
273 | tmp |= ~0UL >> (32-offset); | ||
274 | if (size < 32) | ||
275 | goto found_first; | ||
276 | if (~tmp) | ||
277 | goto found_middle; | ||
278 | size -= 32; | ||
279 | result += 32; | ||
280 | } | ||
281 | while (size & ~31UL) { | ||
282 | if (~(tmp = *(p++))) | ||
283 | goto found_middle; | ||
284 | result += 32; | ||
285 | size -= 32; | ||
286 | } | ||
287 | if (!size) | ||
288 | return result; | ||
289 | tmp = *p; | ||
290 | |||
291 | found_first: | ||
292 | tmp |= ~0UL << size; | ||
293 | found_middle: | ||
294 | return result + ffz(tmp); | ||
295 | } | ||
296 | |||
297 | /** | ||
298 | * find_next_bit - find the first set bit in a memory region | ||
299 | * @addr: The address to base the search on | ||
300 | * @offset: The bitnumber to start searching at | ||
301 | * @size: The maximum size to search | ||
302 | */ | ||
303 | static __inline__ int find_next_bit(const unsigned long *addr, int size, int offset) | ||
304 | { | ||
305 | unsigned long *p = ((unsigned long *) addr) + (offset >> 5); | ||
306 | unsigned long result = offset & ~31UL; | ||
307 | unsigned long tmp; | ||
308 | |||
309 | if (offset >= size) | ||
310 | return size; | ||
311 | size -= result; | ||
312 | offset &= 31UL; | ||
313 | if (offset) { | ||
314 | tmp = *(p++); | ||
315 | tmp &= (~0UL << offset); | ||
316 | if (size < 32) | ||
317 | goto found_first; | ||
318 | if (tmp) | ||
319 | goto found_middle; | ||
320 | size -= 32; | ||
321 | result += 32; | ||
322 | } | ||
323 | while (size & ~31UL) { | ||
324 | if ((tmp = *(p++))) | ||
325 | goto found_middle; | ||
326 | result += 32; | ||
327 | size -= 32; | ||
328 | } | ||
329 | if (!size) | ||
330 | return result; | ||
331 | tmp = *p; | ||
332 | |||
333 | found_first: | ||
334 | tmp &= (~0UL >> (32 - size)); | ||
335 | if (tmp == 0UL) /* Are any bits set? */ | ||
336 | return result + size; /* Nope. */ | ||
337 | found_middle: | ||
338 | return result + __ffs(tmp); | ||
339 | } | ||
340 | |||
341 | /** | ||
342 | * find_first_zero_bit - find the first zero bit in a memory region | ||
343 | * @addr: The address to start the search at | ||
344 | * @size: The maximum size to search | ||
345 | * | ||
346 | * Returns the bit-number of the first zero bit, not the number of the byte | ||
347 | * containing a bit. | ||
348 | */ | ||
349 | |||
350 | #define find_first_zero_bit(addr, size) \ | ||
351 | find_next_zero_bit((addr), (size), 0) | ||
352 | #define find_first_bit(addr, size) \ | ||
353 | find_next_bit((addr), (size), 0) | ||
354 | |||
355 | #define ext2_set_bit __test_and_set_bit | ||
356 | #define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) | 160 | #define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) |
357 | #define ext2_clear_bit __test_and_clear_bit | ||
358 | #define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) | 161 | #define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) |
359 | #define ext2_test_bit test_bit | ||
360 | #define ext2_find_first_zero_bit find_first_zero_bit | ||
361 | #define ext2_find_next_zero_bit find_next_zero_bit | ||
362 | |||
363 | /* Bitmap functions for the minix filesystem. */ | ||
364 | #define minix_set_bit(nr,addr) __test_and_set_bit(nr,addr) | ||
365 | #define minix_clear_bit(nr,addr) __test_and_clear_bit(nr,addr) | ||
366 | #define minix_test_bit(nr,addr) test_bit(nr,addr) | ||
367 | #define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size) | ||
368 | 162 | ||
369 | static inline int sched_find_first_bit(const unsigned long *b) | 163 | #include <asm-generic/bitops/minix.h> |
370 | { | 164 | #include <asm-generic/bitops/sched.h> |
371 | if (unlikely(b[0])) | ||
372 | return __ffs(b[0]); | ||
373 | if (unlikely(b[1])) | ||
374 | return __ffs(b[1]) + 32; | ||
375 | if (unlikely(b[2])) | ||
376 | return __ffs(b[2]) + 64; | ||
377 | if (unlikely(b[3])) | ||
378 | return __ffs(b[3]) + 96; | ||
379 | if (b[4]) | ||
380 | return __ffs(b[4]) + 128; | ||
381 | return __ffs(b[5]) + 32 + 128; | ||
382 | } | ||
383 | 165 | ||
384 | #endif /* __KERNEL__ */ | 166 | #endif /* __KERNEL__ */ |
385 | 167 | ||