1 #ifndef __LINUX_NODEMASK_H
2 #define __LINUX_NODEMASK_H
5 * Nodemasks provide a bitmap suitable for representing the
6 * set of Node's in a system, one bit position per Node number.
8 * See detailed comments in the file linux/bitmap.h describing the
9 * data type on which these nodemasks are based.
11 * For details of nodemask_scnprintf() and nodemask_parse(),
12 * see bitmap_scnprintf() and bitmap_parse() in lib/bitmap.c.
13 * For details of nodelist_scnprintf() and nodelist_parse(), see
14 * bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
15 * For details of node_remap(), see bitmap_bitremap in lib/bitmap.c.
16 * For details of nodes_remap(), see bitmap_remap in lib/bitmap.c.
18 * The available nodemask operations are:
20 * void node_set(node, mask) turn on bit 'node' in mask
21 * void node_clear(node, mask) turn off bit 'node' in mask
22 * void nodes_setall(mask) set all bits
23 * void nodes_clear(mask) clear all bits
24 * int node_isset(node, mask) true iff bit 'node' set in mask
25 * int node_test_and_set(node, mask) test and set bit 'node' in mask
27 * void nodes_and(dst, src1, src2) dst = src1 & src2 [intersection]
28 * void nodes_or(dst, src1, src2) dst = src1 | src2 [union]
29 * void nodes_xor(dst, src1, src2) dst = src1 ^ src2
30 * void nodes_andnot(dst, src1, src2) dst = src1 & ~src2
31 * void nodes_complement(dst, src) dst = ~src
33 * int nodes_equal(mask1, mask2) Does mask1 == mask2?
34 * int nodes_intersects(mask1, mask2) Do mask1 and mask2 intersect?
35 * int nodes_subset(mask1, mask2) Is mask1 a subset of mask2?
36 * int nodes_empty(mask) Is mask empty (no bits sets)?
37 * int nodes_full(mask) Is mask full (all bits sets)?
38 * int nodes_weight(mask) Hamming weight - number of set bits
40 * void nodes_shift_right(dst, src, n) Shift right
41 * void nodes_shift_left(dst, src, n) Shift left
43 * int first_node(mask) Number lowest set bit, or MAX_NUMNODES
44 * int next_node(node, mask) Next node past 'node', or MAX_NUMNODES
45 * int first_unset_node(mask) First node not set in mask, or
48 * nodemask_t nodemask_of_node(node) Return nodemask with bit 'node' set
49 * NODE_MASK_ALL Initializer - all bits set
50 * NODE_MASK_NONE Initializer - no bits set
51 * unsigned long *nodes_addr(mask) Array of unsigned long's in mask
53 * int nodemask_scnprintf(buf, len, mask) Format nodemask for printing
54 * int nodemask_parse(ubuf, ulen, mask) Parse ascii string as nodemask
55 * int nodelist_scnprintf(buf, len, mask) Format nodemask as list for printing
56 * int nodelist_parse(buf, map) Parse ascii string as nodelist
57 * int node_remap(oldbit, old, new) newbit = map(old, new)(oldbit)
58 * int nodes_remap(dst, src, old, new) *dst = map(old, new)(dst)
60 * for_each_node_mask(node, mask) for-loop node over mask
62 * int num_online_nodes() Number of online Nodes
63 * int num_possible_nodes() Number of all possible Nodes
65 * int node_online(node) Is some node online?
66 * int node_possible(node) Is some node possible?
68 * int any_online_node(mask) First online node in mask
70 * node_set_online(node) set bit 'node' in node_online_map
71 * node_set_offline(node) clear bit 'node' in node_online_map
73 * for_each_node(node) for-loop node over node_possible_map
74 * for_each_online_node(node) for-loop node over node_online_map
77 * 1) The 'type-checked' form of node_isset() causes gcc (3.3.2, anyway)
78 * to generate slightly worse code. So use a simple one-line #define
79 * for node_isset(), instead of wrapping an inline inside a macro, the
80 * way we do the other calls.
83 #include <linux/kernel.h>
84 #include <linux/threads.h>
85 #include <linux/bitmap.h>
86 #include <linux/numa.h>
88 typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
89 extern nodemask_t _unused_nodemask_arg_;
91 #define node_set(node, dst) __node_set((node), &(dst))
92 static inline void __node_set(int node, volatile nodemask_t *dstp)
94 set_bit(node, dstp->bits);
97 #define node_clear(node, dst) __node_clear((node), &(dst))
98 static inline void __node_clear(int node, volatile nodemask_t *dstp)
100 clear_bit(node, dstp->bits);
103 #define nodes_setall(dst) __nodes_setall(&(dst), MAX_NUMNODES)
104 static inline void __nodes_setall(nodemask_t *dstp, int nbits)
106 bitmap_fill(dstp->bits, nbits);
109 #define nodes_clear(dst) __nodes_clear(&(dst), MAX_NUMNODES)
110 static inline void __nodes_clear(nodemask_t *dstp, int nbits)
112 bitmap_zero(dstp->bits, nbits);
115 /* No static inline type checking - see Subtlety (1) above. */
116 #define node_isset(node, nodemask) test_bit((node), (nodemask).bits)
118 #define node_test_and_set(node, nodemask) \
119 __node_test_and_set((node), &(nodemask))
120 static inline int __node_test_and_set(int node, nodemask_t *addr)
122 return test_and_set_bit(node, addr->bits);
125 #define nodes_and(dst, src1, src2) \
126 __nodes_and(&(dst), &(src1), &(src2), MAX_NUMNODES)
127 static inline void __nodes_and(nodemask_t *dstp, const nodemask_t *src1p,
128 const nodemask_t *src2p, int nbits)
130 bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
133 #define nodes_or(dst, src1, src2) \
134 __nodes_or(&(dst), &(src1), &(src2), MAX_NUMNODES)
135 static inline void __nodes_or(nodemask_t *dstp, const nodemask_t *src1p,
136 const nodemask_t *src2p, int nbits)
138 bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
141 #define nodes_xor(dst, src1, src2) \
142 __nodes_xor(&(dst), &(src1), &(src2), MAX_NUMNODES)
143 static inline void __nodes_xor(nodemask_t *dstp, const nodemask_t *src1p,
144 const nodemask_t *src2p, int nbits)
146 bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
149 #define nodes_andnot(dst, src1, src2) \
150 __nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
151 static inline void __nodes_andnot(nodemask_t *dstp, const nodemask_t *src1p,
152 const nodemask_t *src2p, int nbits)
154 bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
157 #define nodes_complement(dst, src) \
158 __nodes_complement(&(dst), &(src), MAX_NUMNODES)
159 static inline void __nodes_complement(nodemask_t *dstp,
160 const nodemask_t *srcp, int nbits)
162 bitmap_complement(dstp->bits, srcp->bits, nbits);
165 #define nodes_equal(src1, src2) \
166 __nodes_equal(&(src1), &(src2), MAX_NUMNODES)
167 static inline int __nodes_equal(const nodemask_t *src1p,
168 const nodemask_t *src2p, int nbits)
170 return bitmap_equal(src1p->bits, src2p->bits, nbits);
173 #define nodes_intersects(src1, src2) \
174 __nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
175 static inline int __nodes_intersects(const nodemask_t *src1p,
176 const nodemask_t *src2p, int nbits)
178 return bitmap_intersects(src1p->bits, src2p->bits, nbits);
181 #define nodes_subset(src1, src2) \
182 __nodes_subset(&(src1), &(src2), MAX_NUMNODES)
183 static inline int __nodes_subset(const nodemask_t *src1p,
184 const nodemask_t *src2p, int nbits)
186 return bitmap_subset(src1p->bits, src2p->bits, nbits);
189 #define nodes_empty(src) __nodes_empty(&(src), MAX_NUMNODES)
190 static inline int __nodes_empty(const nodemask_t *srcp, int nbits)
192 return bitmap_empty(srcp->bits, nbits);
195 #define nodes_full(nodemask) __nodes_full(&(nodemask), MAX_NUMNODES)
196 static inline int __nodes_full(const nodemask_t *srcp, int nbits)
198 return bitmap_full(srcp->bits, nbits);
201 #define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
202 static inline int __nodes_weight(const nodemask_t *srcp, int nbits)
204 return bitmap_weight(srcp->bits, nbits);
207 #define nodes_shift_right(dst, src, n) \
208 __nodes_shift_right(&(dst), &(src), (n), MAX_NUMNODES)
209 static inline void __nodes_shift_right(nodemask_t *dstp,
210 const nodemask_t *srcp, int n, int nbits)
212 bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
215 #define nodes_shift_left(dst, src, n) \
216 __nodes_shift_left(&(dst), &(src), (n), MAX_NUMNODES)
217 static inline void __nodes_shift_left(nodemask_t *dstp,
218 const nodemask_t *srcp, int n, int nbits)
220 bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
223 /* FIXME: better would be to fix all architectures to never return
224 > MAX_NUMNODES, then the silly min_ts could be dropped. */
226 #define first_node(src) __first_node(&(src))
227 static inline int __first_node(const nodemask_t *srcp)
229 return min_t(int, MAX_NUMNODES, find_first_bit(srcp->bits, MAX_NUMNODES));
232 #define next_node(n, src) __next_node((n), &(src))
233 static inline int __next_node(int n, const nodemask_t *srcp)
235 return min_t(int,MAX_NUMNODES,find_next_bit(srcp->bits, MAX_NUMNODES, n+1));
238 #define nodemask_of_node(node) \
240 typeof(_unused_nodemask_arg_) m; \
241 if (sizeof(m) == sizeof(unsigned long)) { \
242 m.bits[0] = 1UL<<(node); \
245 node_set((node), m); \
250 #define first_unset_node(mask) __first_unset_node(&(mask))
251 static inline int __first_unset_node(const nodemask_t *maskp)
253 return min_t(int,MAX_NUMNODES,
254 find_first_zero_bit(maskp->bits, MAX_NUMNODES));
257 #define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES)
259 #if MAX_NUMNODES <= BITS_PER_LONG
261 #define NODE_MASK_ALL \
263 [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
268 #define NODE_MASK_ALL \
270 [0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL, \
271 [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
276 #define NODE_MASK_NONE \
278 [0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] = 0UL \
281 #define nodes_addr(src) ((src).bits)
283 #define nodemask_scnprintf(buf, len, src) \
284 __nodemask_scnprintf((buf), (len), &(src), MAX_NUMNODES)
285 static inline int __nodemask_scnprintf(char *buf, int len,
286 const nodemask_t *srcp, int nbits)
288 return bitmap_scnprintf(buf, len, srcp->bits, nbits);
291 #define nodemask_parse(ubuf, ulen, dst) \
292 __nodemask_parse((ubuf), (ulen), &(dst), MAX_NUMNODES)
293 static inline int __nodemask_parse(const char __user *buf, int len,
294 nodemask_t *dstp, int nbits)
296 return bitmap_parse(buf, len, dstp->bits, nbits);
299 #define nodelist_scnprintf(buf, len, src) \
300 __nodelist_scnprintf((buf), (len), &(src), MAX_NUMNODES)
301 static inline int __nodelist_scnprintf(char *buf, int len,
302 const nodemask_t *srcp, int nbits)
304 return bitmap_scnlistprintf(buf, len, srcp->bits, nbits);
307 #define nodelist_parse(buf, dst) __nodelist_parse((buf), &(dst), MAX_NUMNODES)
308 static inline int __nodelist_parse(const char *buf, nodemask_t *dstp, int nbits)
310 return bitmap_parselist(buf, dstp->bits, nbits);
313 #define node_remap(oldbit, old, new) \
314 __node_remap((oldbit), &(old), &(new), MAX_NUMNODES)
315 static inline int __node_remap(int oldbit,
316 const nodemask_t *oldp, const nodemask_t *newp, int nbits)
318 return bitmap_bitremap(oldbit, oldp->bits, newp->bits, nbits);
321 #define nodes_remap(dst, src, old, new) \
322 __nodes_remap(&(dst), &(src), &(old), &(new), MAX_NUMNODES)
323 static inline void __nodes_remap(nodemask_t *dstp, const nodemask_t *srcp,
324 const nodemask_t *oldp, const nodemask_t *newp, int nbits)
326 bitmap_remap(dstp->bits, srcp->bits, oldp->bits, newp->bits, nbits);
330 #define for_each_node_mask(node, mask) \
331 for ((node) = first_node(mask); \
332 (node) < MAX_NUMNODES; \
333 (node) = next_node((node), (mask)))
334 #else /* MAX_NUMNODES == 1 */
335 #define for_each_node_mask(node, mask) \
336 if (!nodes_empty(mask)) \
337 for ((node) = 0; (node) < 1; (node)++)
338 #endif /* MAX_NUMNODES */
341 * The following particular system nodemasks and operations
342 * on them manage all possible and online nodes.
345 extern nodemask_t node_online_map;
346 extern nodemask_t node_possible_map;
349 #define num_online_nodes() nodes_weight(node_online_map)
350 #define num_possible_nodes() nodes_weight(node_possible_map)
351 #define node_online(node) node_isset((node), node_online_map)
352 #define node_possible(node) node_isset((node), node_possible_map)
353 #define first_online_node first_node(node_online_map)
354 #define next_online_node(nid) next_node((nid), node_online_map)
355 int highest_possible_node_id(void);
357 #define num_online_nodes() 1
358 #define num_possible_nodes() 1
359 #define node_online(node) ((node) == 0)
360 #define node_possible(node) ((node) == 0)
361 #define first_online_node 0
362 #define next_online_node(nid) (MAX_NUMNODES)
363 #define highest_possible_node_id() 0
366 #define any_online_node(mask) \
369 for_each_node_mask(node, (mask)) \
370 if (node_online(node)) \
375 #define node_set_online(node) set_bit((node), node_online_map.bits)
376 #define node_set_offline(node) clear_bit((node), node_online_map.bits)
378 #define for_each_node(node) for_each_node_mask((node), node_possible_map)
379 #define for_each_online_node(node) for_each_node_mask((node), node_online_map)
381 #endif /* __LINUX_NODEMASK_H */