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-rw-r--r--include/asm-cris/bitops.h235
1 files changed, 8 insertions, 227 deletions
diff --git a/include/asm-cris/bitops.h b/include/asm-cris/bitops.h
index b7fef1572dc0..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
@@ -101,19 +85,6 @@ static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
101 retval = (mask & *adr) != 0; 85 retval = (mask & *adr) != 0;
102 *adr |= mask; 86 *adr |= mask;
103 cris_atomic_restore(addr, flags); 87 cris_atomic_restore(addr, flags);
104 local_irq_restore(flags);
105 return retval;
106}
107
108static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
109{
110 unsigned int mask, retval;
111 unsigned int *adr = (unsigned int *)addr;
112
113 adr += nr >> 5;
114 mask = 1 << (nr & 0x1f);
115 retval = (mask & *adr) != 0;
116 *adr |= mask;
117 return retval; 88 return retval;
118} 89}
119 90
@@ -148,27 +119,6 @@ static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
148} 119}
149 120
150/** 121/**
151 * __test_and_clear_bit - Clear a bit and return its old value
152 * @nr: Bit to clear
153 * @addr: Address to count from
154 *
155 * This operation is non-atomic and can be reordered.
156 * If two examples of this operation race, one can appear to succeed
157 * but actually fail. You must protect multiple accesses with a lock.
158 */
159
160static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
161{
162 unsigned int mask, retval;
163 unsigned int *adr = (unsigned int *)addr;
164
165 adr += nr >> 5;
166 mask = 1 << (nr & 0x1f);
167 retval = (mask & *adr) != 0;
168 *adr &= ~mask;
169 return retval;
170}
171/**
172 * 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
173 * @nr: Bit to change 123 * @nr: Bit to change
174 * @addr: Address to count from 124 * @addr: Address to count from
@@ -191,42 +141,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
191 return retval; 141 return retval;
192} 142}
193 143
194/* WARNING: non atomic and it can be reordered! */ 144#include <asm-generic/bitops/non-atomic.h>
195
196static inline int __test_and_change_bit(int nr, volatile unsigned long *addr)
197{
198 unsigned int mask, retval;
199 unsigned int *adr = (unsigned int *)addr;
200
201 adr += nr >> 5;
202 mask = 1 << (nr & 0x1f);
203 retval = (mask & *adr) != 0;
204 *adr ^= mask;
205
206 return retval;
207}
208
209/**
210 * test_bit - Determine whether a bit is set
211 * @nr: bit number to test
212 * @addr: Address to start counting from
213 *
214 * This routine doesn't need to be atomic.
215 */
216
217static inline int test_bit(int nr, const volatile unsigned long *addr)
218{
219 unsigned int mask;
220 unsigned int *adr = (unsigned int *)addr;
221
222 adr += nr >> 5;
223 mask = 1 << (nr & 0x1f);
224 return ((mask & *adr) != 0);
225}
226
227/*
228 * Find-bit routines..
229 */
230 145
231/* 146/*
232 * Since we define it "external", it collides with the built-in 147 * Since we define it "external", it collides with the built-in
@@ -235,152 +150,18 @@ static inline int test_bit(int nr, const volatile unsigned long *addr)
235 */ 150 */
236#define ffs kernel_ffs 151#define ffs kernel_ffs
237 152
238/* 153#include <asm-generic/bitops/fls.h>
239 * fls: find last bit set. 154#include <asm-generic/bitops/fls64.h>
240 */ 155#include <asm-generic/bitops/hweight.h>
241 156#include <asm-generic/bitops/find.h>
242#define fls(x) generic_fls(x)
243#define fls64(x) generic_fls64(x)
244
245/*
246 * hweightN - returns the hamming weight of a N-bit word
247 * @x: the word to weigh
248 *
249 * The Hamming Weight of a number is the total number of bits set in it.
250 */
251 157
252#define hweight32(x) generic_hweight32(x) 158#include <asm-generic/bitops/ext2-non-atomic.h>
253#define hweight16(x) generic_hweight16(x)
254#define hweight8(x) generic_hweight8(x)
255 159
256/**
257 * find_next_zero_bit - find the first zero bit in a memory region
258 * @addr: The address to base the search on
259 * @offset: The bitnumber to start searching at
260 * @size: The maximum size to search
261 */
262static inline int find_next_zero_bit (const unsigned long * addr, int size, int offset)
263{
264 unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
265 unsigned long result = offset & ~31UL;
266 unsigned long tmp;
267
268 if (offset >= size)
269 return size;
270 size -= result;
271 offset &= 31UL;
272 if (offset) {
273 tmp = *(p++);
274 tmp |= ~0UL >> (32-offset);
275 if (size < 32)
276 goto found_first;
277 if (~tmp)
278 goto found_middle;
279 size -= 32;
280 result += 32;
281 }
282 while (size & ~31UL) {
283 if (~(tmp = *(p++)))
284 goto found_middle;
285 result += 32;
286 size -= 32;
287 }
288 if (!size)
289 return result;
290 tmp = *p;
291
292 found_first:
293 tmp |= ~0UL << size;
294 found_middle:
295 return result + ffz(tmp);
296}
297
298/**
299 * find_next_bit - find the first set bit in a memory region
300 * @addr: The address to base the search on
301 * @offset: The bitnumber to start searching at
302 * @size: The maximum size to search
303 */
304static __inline__ int find_next_bit(const unsigned long *addr, int size, int offset)
305{
306 unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
307 unsigned long result = offset & ~31UL;
308 unsigned long tmp;
309
310 if (offset >= size)
311 return size;
312 size -= result;
313 offset &= 31UL;
314 if (offset) {
315 tmp = *(p++);
316 tmp &= (~0UL << offset);
317 if (size < 32)
318 goto found_first;
319 if (tmp)
320 goto found_middle;
321 size -= 32;
322 result += 32;
323 }
324 while (size & ~31UL) {
325 if ((tmp = *(p++)))
326 goto found_middle;
327 result += 32;
328 size -= 32;
329 }
330 if (!size)
331 return result;
332 tmp = *p;
333
334found_first:
335 tmp &= (~0UL >> (32 - size));
336 if (tmp == 0UL) /* Are any bits set? */
337 return result + size; /* Nope. */
338found_middle:
339 return result + __ffs(tmp);
340}
341
342/**
343 * find_first_zero_bit - find the first zero bit in a memory region
344 * @addr: The address to start the search at
345 * @size: The maximum size to search
346 *
347 * Returns the bit-number of the first zero bit, not the number of the byte
348 * containing a bit.
349 */
350
351#define find_first_zero_bit(addr, size) \
352 find_next_zero_bit((addr), (size), 0)
353#define find_first_bit(addr, size) \
354 find_next_bit((addr), (size), 0)
355
356#define ext2_set_bit test_and_set_bit
357#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)
358#define ext2_clear_bit test_and_clear_bit
359#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)
360#define ext2_test_bit test_bit
361#define ext2_find_first_zero_bit find_first_zero_bit
362#define ext2_find_next_zero_bit find_next_zero_bit
363
364/* Bitmap functions for the minix filesystem. */
365#define minix_set_bit(nr,addr) test_and_set_bit(nr,addr)
366#define minix_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
367#define minix_test_bit(nr,addr) test_bit(nr,addr)
368#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
369 162
370static inline int sched_find_first_bit(const unsigned long *b) 163#include <asm-generic/bitops/minix.h>
371{ 164#include <asm-generic/bitops/sched.h>
372 if (unlikely(b[0]))
373 return __ffs(b[0]);
374 if (unlikely(b[1]))
375 return __ffs(b[1]) + 32;
376 if (unlikely(b[2]))
377 return __ffs(b[2]) + 64;
378 if (unlikely(b[3]))
379 return __ffs(b[3]) + 96;
380 if (b[4])
381 return __ffs(b[4]) + 128;
382 return __ffs(b[5]) + 32 + 128;
383}
384 165
385#endif /* __KERNEL__ */ 166#endif /* __KERNEL__ */
386 167