1#ifndef __LINUX_BITMAP_H
2#define __LINUX_BITMAP_H
3
4#ifndef __ASSEMBLY__
5
6#include <linux/types.h>
7#include <linux/bitops.h>
8#include <linux/string.h>
9#include <linux/kernel.h>
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91extern int __bitmap_empty(const unsigned long *bitmap, int bits);
92extern int __bitmap_full(const unsigned long *bitmap, int bits);
93extern int __bitmap_equal(const unsigned long *bitmap1,
94 const unsigned long *bitmap2, int bits);
95extern void __bitmap_complement(unsigned long *dst, const unsigned long *src,
96 int bits);
97extern void __bitmap_shift_right(unsigned long *dst,
98 const unsigned long *src, int shift, int bits);
99extern void __bitmap_shift_left(unsigned long *dst,
100 const unsigned long *src, int shift, int bits);
101extern int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
102 const unsigned long *bitmap2, int bits);
103extern void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
104 const unsigned long *bitmap2, int bits);
105extern void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,
106 const unsigned long *bitmap2, int bits);
107extern int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
108 const unsigned long *bitmap2, int bits);
109extern int __bitmap_intersects(const unsigned long *bitmap1,
110 const unsigned long *bitmap2, int bits);
111extern int __bitmap_subset(const unsigned long *bitmap1,
112 const unsigned long *bitmap2, int bits);
113extern int __bitmap_weight(const unsigned long *bitmap, int bits);
114
115extern void bitmap_set(unsigned long *map, int i, int len);
116extern void bitmap_clear(unsigned long *map, int start, int nr);
117extern unsigned long bitmap_find_next_zero_area(unsigned long *map,
118 unsigned long size,
119 unsigned long start,
120 unsigned int nr,
121 unsigned long align_mask);
122
123extern int bitmap_scnprintf(char *buf, unsigned int len,
124 const unsigned long *src, int nbits);
125extern int __bitmap_parse(const char *buf, unsigned int buflen, int is_user,
126 unsigned long *dst, int nbits);
127extern int bitmap_parse_user(const char __user *ubuf, unsigned int ulen,
128 unsigned long *dst, int nbits);
129extern int bitmap_scnlistprintf(char *buf, unsigned int len,
130 const unsigned long *src, int nbits);
131extern int bitmap_parselist(const char *buf, unsigned long *maskp,
132 int nmaskbits);
133extern int bitmap_parselist_user(const char __user *ubuf, unsigned int ulen,
134 unsigned long *dst, int nbits);
135extern void bitmap_remap(unsigned long *dst, const unsigned long *src,
136 const unsigned long *old, const unsigned long *new, int bits);
137extern int bitmap_bitremap(int oldbit,
138 const unsigned long *old, const unsigned long *new, int bits);
139extern void bitmap_onto(unsigned long *dst, const unsigned long *orig,
140 const unsigned long *relmap, int bits);
141extern void bitmap_fold(unsigned long *dst, const unsigned long *orig,
142 int sz, int bits);
143extern int bitmap_find_free_region(unsigned long *bitmap, int bits, int order);
144extern void bitmap_release_region(unsigned long *bitmap, int pos, int order);
145extern int bitmap_allocate_region(unsigned long *bitmap, int pos, int order);
146extern void bitmap_copy_le(void *dst, const unsigned long *src, int nbits);
147extern int bitmap_ord_to_pos(const unsigned long *bitmap, int n, int bits);
148
149#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))
150#define BITMAP_LAST_WORD_MASK(nbits) \
151( \
152 ((nbits) % BITS_PER_LONG) ? \
153 (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
154)
155
156#define small_const_nbits(nbits) \
157 (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
158
159static inline void bitmap_zero(unsigned long *dst, int nbits)
160{
161 if (small_const_nbits(nbits))
162 *dst = 0UL;
163 else {
164 int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
165 memset(dst, 0, len);
166 }
167}
168
169static inline void bitmap_fill(unsigned long *dst, int nbits)
170{
171 size_t nlongs = BITS_TO_LONGS(nbits);
172 if (!small_const_nbits(nbits)) {
173 int len = (nlongs - 1) * sizeof(unsigned long);
174 memset(dst, 0xff, len);
175 }
176 dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
177}
178
179static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
180 int nbits)
181{
182 if (small_const_nbits(nbits))
183 *dst = *src;
184 else {
185 int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
186 memcpy(dst, src, len);
187 }
188}
189
190static inline int bitmap_and(unsigned long *dst, const unsigned long *src1,
191 const unsigned long *src2, int nbits)
192{
193 if (small_const_nbits(nbits))
194 return (*dst = *src1 & *src2) != 0;
195 return __bitmap_and(dst, src1, src2, nbits);
196}
197
198static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
199 const unsigned long *src2, int nbits)
200{
201 if (small_const_nbits(nbits))
202 *dst = *src1 | *src2;
203 else
204 __bitmap_or(dst, src1, src2, nbits);
205}
206
207static inline void bitmap_xor(unsigned long *dst, const unsigned long *src1,
208 const unsigned long *src2, int nbits)
209{
210 if (small_const_nbits(nbits))
211 *dst = *src1 ^ *src2;
212 else
213 __bitmap_xor(dst, src1, src2, nbits);
214}
215
216static inline int bitmap_andnot(unsigned long *dst, const unsigned long *src1,
217 const unsigned long *src2, int nbits)
218{
219 if (small_const_nbits(nbits))
220 return (*dst = *src1 & ~(*src2)) != 0;
221 return __bitmap_andnot(dst, src1, src2, nbits);
222}
223
224static inline void bitmap_complement(unsigned long *dst, const unsigned long *src,
225 int nbits)
226{
227 if (small_const_nbits(nbits))
228 *dst = ~(*src) & BITMAP_LAST_WORD_MASK(nbits);
229 else
230 __bitmap_complement(dst, src, nbits);
231}
232
233static inline int bitmap_equal(const unsigned long *src1,
234 const unsigned long *src2, int nbits)
235{
236 if (small_const_nbits(nbits))
237 return ! ((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
238 else
239 return __bitmap_equal(src1, src2, nbits);
240}
241
242static inline int bitmap_intersects(const unsigned long *src1,
243 const unsigned long *src2, int nbits)
244{
245 if (small_const_nbits(nbits))
246 return ((*src1 & *src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0;
247 else
248 return __bitmap_intersects(src1, src2, nbits);
249}
250
251static inline int bitmap_subset(const unsigned long *src1,
252 const unsigned long *src2, int nbits)
253{
254 if (small_const_nbits(nbits))
255 return ! ((*src1 & ~(*src2)) & BITMAP_LAST_WORD_MASK(nbits));
256 else
257 return __bitmap_subset(src1, src2, nbits);
258}
259
260static inline int bitmap_empty(const unsigned long *src, int nbits)
261{
262 if (small_const_nbits(nbits))
263 return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
264 else
265 return __bitmap_empty(src, nbits);
266}
267
268static inline int bitmap_full(const unsigned long *src, int nbits)
269{
270 if (small_const_nbits(nbits))
271 return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
272 else
273 return __bitmap_full(src, nbits);
274}
275
276static inline int bitmap_weight(const unsigned long *src, int nbits)
277{
278 if (small_const_nbits(nbits))
279 return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
280 return __bitmap_weight(src, nbits);
281}
282
283static inline void bitmap_shift_right(unsigned long *dst,
284 const unsigned long *src, int n, int nbits)
285{
286 if (small_const_nbits(nbits))
287 *dst = *src >> n;
288 else
289 __bitmap_shift_right(dst, src, n, nbits);
290}
291
292static inline void bitmap_shift_left(unsigned long *dst,
293 const unsigned long *src, int n, int nbits)
294{
295 if (small_const_nbits(nbits))
296 *dst = (*src << n) & BITMAP_LAST_WORD_MASK(nbits);
297 else
298 __bitmap_shift_left(dst, src, n, nbits);
299}
300
301static inline int bitmap_parse(const char *buf, unsigned int buflen,
302 unsigned long *maskp, int nmaskbits)
303{
304 return __bitmap_parse(buf, buflen, 0, maskp, nmaskbits);
305}
306
307#endif
308
309#endif
310