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_user(),
12 * see bitmap_scnprintf() and bitmap_parse_user() 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.
17 * For details of nodes_onto(), see bitmap_onto in lib/bitmap.c.
18 * For details of nodes_fold(), see bitmap_fold in lib/bitmap.c.
20 * The available nodemask operations are:
22 * void node_set(node, mask) turn on bit 'node' in mask
23 * void node_clear(node, mask) turn off bit 'node' in mask
24 * void nodes_setall(mask) set all bits
25 * void nodes_clear(mask) clear all bits
26 * int node_isset(node, mask) true iff bit 'node' set in mask
27 * int node_test_and_set(node, mask) test and set bit 'node' in mask
29 * void nodes_and(dst, src1, src2) dst = src1 & src2 [intersection]
30 * void nodes_or(dst, src1, src2) dst = src1 | src2 [union]
31 * void nodes_xor(dst, src1, src2) dst = src1 ^ src2
32 * void nodes_andnot(dst, src1, src2) dst = src1 & ~src2
33 * void nodes_complement(dst, src) dst = ~src
35 * int nodes_equal(mask1, mask2) Does mask1 == mask2?
36 * int nodes_intersects(mask1, mask2) Do mask1 and mask2 intersect?
37 * int nodes_subset(mask1, mask2) Is mask1 a subset of mask2?
38 * int nodes_empty(mask) Is mask empty (no bits sets)?
39 * int nodes_full(mask) Is mask full (all bits sets)?
40 * int nodes_weight(mask) Hamming weight - number of set bits
42 * void nodes_shift_right(dst, src, n) Shift right
43 * void nodes_shift_left(dst, src, n) Shift left
45 * int first_node(mask) Number lowest set bit, or MAX_NUMNODES
46 * int next_node(node, mask) Next node past 'node', or MAX_NUMNODES
47 * int first_unset_node(mask) First node not set in mask, or
50 * nodemask_t nodemask_of_node(node) Return nodemask with bit 'node' set
51 * NODE_MASK_ALL Initializer - all bits set
52 * NODE_MASK_NONE Initializer - no bits set
53 * unsigned long *nodes_addr(mask) Array of unsigned long's in mask
55 * int nodemask_scnprintf(buf, len, mask) Format nodemask for printing
56 * int nodemask_parse_user(ubuf, ulen, mask) Parse ascii string as nodemask
57 * int nodelist_scnprintf(buf, len, mask) Format nodemask as list for printing
58 * int nodelist_parse(buf, map) Parse ascii string as nodelist
59 * int node_remap(oldbit, old, new) newbit = map(old, new)(oldbit)
60 * void nodes_remap(dst, src, old, new) *dst = map(old, new)(src)
61 * void nodes_onto(dst, orig, relmap) *dst = orig relative to relmap
62 * void nodes_fold(dst, orig, sz) dst bits = orig bits mod sz
64 * for_each_node_mask(node, mask) for-loop node over mask
66 * int num_online_nodes() Number of online Nodes
67 * int num_possible_nodes() Number of all possible Nodes
69 * int node_online(node) Is some node online?
70 * int node_possible(node) Is some node possible?
72 * int any_online_node(mask) First online node in mask
74 * node_set_online(node) set bit 'node' in node_online_map
75 * node_set_offline(node) clear bit 'node' in node_online_map
77 * for_each_node(node) for-loop node over node_possible_map
78 * for_each_online_node(node) for-loop node over node_online_map
81 * 1) The 'type-checked' form of node_isset() causes gcc (3.3.2, anyway)
82 * to generate slightly worse code. So use a simple one-line #define
83 * for node_isset(), instead of wrapping an inline inside a macro, the
84 * way we do the other calls.
87 #include <linux/kernel.h>
88 #include <linux/threads.h>
89 #include <linux/bitmap.h>
90 #include <linux/numa.h>
92 typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
93 extern nodemask_t _unused_nodemask_arg_;
95 #define node_set(node, dst) __node_set((node), &(dst))
96 static inline void __node_set(int node, volatile nodemask_t *dstp)
98 set_bit(node, dstp->bits);
101 #define node_clear(node, dst) __node_clear((node), &(dst))
102 static inline void __node_clear(int node, volatile nodemask_t *dstp)
104 clear_bit(node, dstp->bits);
107 #define nodes_setall(dst) __nodes_setall(&(dst), MAX_NUMNODES)
108 static inline void __nodes_setall(nodemask_t *dstp, int nbits)
110 bitmap_fill(dstp->bits, nbits);
113 #define nodes_clear(dst) __nodes_clear(&(dst), MAX_NUMNODES)
114 static inline void __nodes_clear(nodemask_t *dstp, int nbits)
116 bitmap_zero(dstp->bits, nbits);
119 /* No static inline type checking - see Subtlety (1) above. */
120 #define node_isset(node, nodemask) test_bit((node), (nodemask).bits)
122 #define node_test_and_set(node, nodemask) \
123 __node_test_and_set((node), &(nodemask))
124 static inline int __node_test_and_set(int node, nodemask_t *addr)
126 return test_and_set_bit(node, addr->bits);
129 #define nodes_and(dst, src1, src2) \
130 __nodes_and(&(dst), &(src1), &(src2), MAX_NUMNODES)
131 static inline void __nodes_and(nodemask_t *dstp, const nodemask_t *src1p,
132 const nodemask_t *src2p, int nbits)
134 bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
137 #define nodes_or(dst, src1, src2) \
138 __nodes_or(&(dst), &(src1), &(src2), MAX_NUMNODES)
139 static inline void __nodes_or(nodemask_t *dstp, const nodemask_t *src1p,
140 const nodemask_t *src2p, int nbits)
142 bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
145 #define nodes_xor(dst, src1, src2) \
146 __nodes_xor(&(dst), &(src1), &(src2), MAX_NUMNODES)
147 static inline void __nodes_xor(nodemask_t *dstp, const nodemask_t *src1p,
148 const nodemask_t *src2p, int nbits)
150 bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
153 #define nodes_andnot(dst, src1, src2) \
154 __nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
155 static inline void __nodes_andnot(nodemask_t *dstp, const nodemask_t *src1p,
156 const nodemask_t *src2p, int nbits)
158 bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
161 #define nodes_complement(dst, src) \
162 __nodes_complement(&(dst), &(src), MAX_NUMNODES)
163 static inline void __nodes_complement(nodemask_t *dstp,
164 const nodemask_t *srcp, int nbits)
166 bitmap_complement(dstp->bits, srcp->bits, nbits);
169 #define nodes_equal(src1, src2) \
170 __nodes_equal(&(src1), &(src2), MAX_NUMNODES)
171 static inline int __nodes_equal(const nodemask_t *src1p,
172 const nodemask_t *src2p, int nbits)
174 return bitmap_equal(src1p->bits, src2p->bits, nbits);
177 #define nodes_intersects(src1, src2) \
178 __nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
179 static inline int __nodes_intersects(const nodemask_t *src1p,
180 const nodemask_t *src2p, int nbits)
182 return bitmap_intersects(src1p->bits, src2p->bits, nbits);
185 #define nodes_subset(src1, src2) \
186 __nodes_subset(&(src1), &(src2), MAX_NUMNODES)
187 static inline int __nodes_subset(const nodemask_t *src1p,
188 const nodemask_t *src2p, int nbits)
190 return bitmap_subset(src1p->bits, src2p->bits, nbits);
193 #define nodes_empty(src) __nodes_empty(&(src), MAX_NUMNODES)
194 static inline int __nodes_empty(const nodemask_t *srcp, int nbits)
196 return bitmap_empty(srcp->bits, nbits);
199 #define nodes_full(nodemask) __nodes_full(&(nodemask), MAX_NUMNODES)
200 static inline int __nodes_full(const nodemask_t *srcp, int nbits)
202 return bitmap_full(srcp->bits, nbits);
205 #define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
206 static inline int __nodes_weight(const nodemask_t *srcp, int nbits)
208 return bitmap_weight(srcp->bits, nbits);
211 #define nodes_shift_right(dst, src, n) \
212 __nodes_shift_right(&(dst), &(src), (n), MAX_NUMNODES)
213 static inline void __nodes_shift_right(nodemask_t *dstp,
214 const nodemask_t *srcp, int n, int nbits)
216 bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
219 #define nodes_shift_left(dst, src, n) \
220 __nodes_shift_left(&(dst), &(src), (n), MAX_NUMNODES)
221 static inline void __nodes_shift_left(nodemask_t *dstp,
222 const nodemask_t *srcp, int n, int nbits)
224 bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
227 /* FIXME: better would be to fix all architectures to never return
228 > MAX_NUMNODES, then the silly min_ts could be dropped. */
230 #define first_node(src) __first_node(&(src))
231 static inline int __first_node(const nodemask_t *srcp)
233 return min_t(int, MAX_NUMNODES, find_first_bit(srcp->bits, MAX_NUMNODES));
236 #define next_node(n, src) __next_node((n), &(src))
237 static inline int __next_node(int n, const nodemask_t *srcp)
239 return min_t(int,MAX_NUMNODES,find_next_bit(srcp->bits, MAX_NUMNODES, n+1));
242 #define nodemask_of_node(node) \
244 typeof(_unused_nodemask_arg_) m; \
245 if (sizeof(m) == sizeof(unsigned long)) { \
246 m.bits[0] = 1UL<<(node); \
249 node_set((node), m); \
254 #define first_unset_node(mask) __first_unset_node(&(mask))
255 static inline int __first_unset_node(const nodemask_t *maskp)
257 return min_t(int,MAX_NUMNODES,
258 find_first_zero_bit(maskp->bits, MAX_NUMNODES));
261 #define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES)
263 #if MAX_NUMNODES <= BITS_PER_LONG
265 #define NODE_MASK_ALL \
267 [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
272 #define NODE_MASK_ALL \
274 [0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL, \
275 [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \
280 #define NODE_MASK_NONE \
282 [0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] = 0UL \
285 #define nodes_addr(src) ((src).bits)
287 #define nodemask_scnprintf(buf, len, src) \
288 __nodemask_scnprintf((buf), (len), &(src), MAX_NUMNODES)
289 static inline int __nodemask_scnprintf(char *buf, int len,
290 const nodemask_t *srcp, int nbits)
292 return bitmap_scnprintf(buf, len, srcp->bits, nbits);
295 #define nodemask_parse_user(ubuf, ulen, dst) \
296 __nodemask_parse_user((ubuf), (ulen), &(dst), MAX_NUMNODES)
297 static inline int __nodemask_parse_user(const char __user *buf, int len,
298 nodemask_t *dstp, int nbits)
300 return bitmap_parse_user(buf, len, dstp->bits, nbits);
303 #define nodelist_scnprintf(buf, len, src) \
304 __nodelist_scnprintf((buf), (len), &(src), MAX_NUMNODES)
305 static inline int __nodelist_scnprintf(char *buf, int len,
306 const nodemask_t *srcp, int nbits)
308 return bitmap_scnlistprintf(buf, len, srcp->bits, nbits);
311 #define nodelist_parse(buf, dst) __nodelist_parse((buf), &(dst), MAX_NUMNODES)
312 static inline int __nodelist_parse(const char *buf, nodemask_t *dstp, int nbits)
314 return bitmap_parselist(buf, dstp->bits, nbits);
317 #define node_remap(oldbit, old, new) \
318 __node_remap((oldbit), &(old), &(new), MAX_NUMNODES)
319 static inline int __node_remap(int oldbit,
320 const nodemask_t *oldp, const nodemask_t *newp, int nbits)
322 return bitmap_bitremap(oldbit, oldp->bits, newp->bits, nbits);
325 #define nodes_remap(dst, src, old, new) \
326 __nodes_remap(&(dst), &(src), &(old), &(new), MAX_NUMNODES)
327 static inline void __nodes_remap(nodemask_t *dstp, const nodemask_t *srcp,
328 const nodemask_t *oldp, const nodemask_t *newp, int nbits)
330 bitmap_remap(dstp->bits, srcp->bits, oldp->bits, newp->bits, nbits);
333 #define nodes_onto(dst, orig, relmap) \
334 __nodes_onto(&(dst), &(orig), &(relmap), MAX_NUMNODES)
335 static inline void __nodes_onto(nodemask_t *dstp, const nodemask_t *origp,
336 const nodemask_t *relmapp, int nbits)
338 bitmap_onto(dstp->bits, origp->bits, relmapp->bits, nbits);
341 #define nodes_fold(dst, orig, sz) \
342 __nodes_fold(&(dst), &(orig), sz, MAX_NUMNODES)
343 static inline void __nodes_fold(nodemask_t *dstp, const nodemask_t *origp,
346 bitmap_fold(dstp->bits, origp->bits, sz, nbits);
350 #define for_each_node_mask(node, mask) \
351 for ((node) = first_node(mask); \
352 (node) < MAX_NUMNODES; \
353 (node) = next_node((node), (mask)))
354 #else /* MAX_NUMNODES == 1 */
355 #define for_each_node_mask(node, mask) \
356 if (!nodes_empty(mask)) \
357 for ((node) = 0; (node) < 1; (node)++)
358 #endif /* MAX_NUMNODES */
361 * Bitmasks that are kept for all the nodes.
364 N_POSSIBLE, /* The node could become online at some point */
365 N_ONLINE, /* The node is online */
366 N_NORMAL_MEMORY, /* The node has regular memory */
367 #ifdef CONFIG_HIGHMEM
368 N_HIGH_MEMORY, /* The node has regular or high memory */
370 N_HIGH_MEMORY = N_NORMAL_MEMORY,
372 N_CPU, /* The node has one or more cpus */
377 * The following particular system nodemasks and operations
378 * on them manage all possible and online nodes.
381 extern nodemask_t node_states[NR_NODE_STATES];
384 static inline int node_state(int node, enum node_states state)
386 return node_isset(node, node_states[state]);
389 static inline void node_set_state(int node, enum node_states state)
391 __node_set(node, &node_states[state]);
394 static inline void node_clear_state(int node, enum node_states state)
396 __node_clear(node, &node_states[state]);
399 static inline int num_node_state(enum node_states state)
401 return nodes_weight(node_states[state]);
404 #define for_each_node_state(__node, __state) \
405 for_each_node_mask((__node), node_states[__state])
407 #define first_online_node first_node(node_states[N_ONLINE])
408 #define next_online_node(nid) next_node((nid), node_states[N_ONLINE])
410 extern int nr_node_ids;
413 static inline int node_state(int node, enum node_states state)
418 static inline void node_set_state(int node, enum node_states state)
422 static inline void node_clear_state(int node, enum node_states state)
426 static inline int num_node_state(enum node_states state)
431 #define for_each_node_state(node, __state) \
432 for ( (node) = 0; (node) == 0; (node) = 1)
434 #define first_online_node 0
435 #define next_online_node(nid) (MAX_NUMNODES)
436 #define nr_node_ids 1
440 #define node_online_map node_states[N_ONLINE]
441 #define node_possible_map node_states[N_POSSIBLE]
443 #define any_online_node(mask) \
446 for_each_node_mask(node, (mask)) \
447 if (node_online(node)) \
452 #define num_online_nodes() num_node_state(N_ONLINE)
453 #define num_possible_nodes() num_node_state(N_POSSIBLE)
454 #define node_online(node) node_state((node), N_ONLINE)
455 #define node_possible(node) node_state((node), N_POSSIBLE)
457 #define node_set_online(node) node_set_state((node), N_ONLINE)
458 #define node_set_offline(node) node_clear_state((node), N_ONLINE)
460 #define for_each_node(node) for_each_node_state(node, N_POSSIBLE)
461 #define for_each_online_node(node) for_each_node_state(node, N_ONLINE)
463 #endif /* __LINUX_NODEMASK_H */