nodemask.h
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- #ifndef __LINUX_NODEMASK_H
- #define __LINUX_NODEMASK_H
- /*
- * Nodemasks provide a bitmap suitable for representing the
- * set of Node's in a system, one bit position per Node number.
- *
- * See detailed comments in the file linux/bitmap.h describing the
- * data type on which these nodemasks are based.
- *
- * For details of nodemask_scnprintf() and nodemask_parse(),
- * see bitmap_scnprintf() and bitmap_parse() in lib/bitmap.c.
- * For details of nodelist_scnprintf() and nodelist_parse(), see
- * bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
- *
- * The available nodemask operations are:
- *
- * void node_set(node, mask) turn on bit 'node' in mask
- * void node_clear(node, mask) turn off bit 'node' in mask
- * void nodes_setall(mask) set all bits
- * void nodes_clear(mask) clear all bits
- * int node_isset(node, mask) true iff bit 'node' set in mask
- * int node_test_and_set(node, mask) test and set bit 'node' in mask
- *
- * void nodes_and(dst, src1, src2) dst = src1 & src2 [intersection]
- * void nodes_or(dst, src1, src2) dst = src1 | src2 [union]
- * void nodes_xor(dst, src1, src2) dst = src1 ^ src2
- * void nodes_andnot(dst, src1, src2) dst = src1 & ~src2
- * void nodes_complement(dst, src) dst = ~src
- *
- * int nodes_equal(mask1, mask2) Does mask1 == mask2?
- * int nodes_intersects(mask1, mask2) Do mask1 and mask2 intersect?
- * int nodes_subset(mask1, mask2) Is mask1 a subset of mask2?
- * int nodes_empty(mask) Is mask empty (no bits sets)?
- * int nodes_full(mask) Is mask full (all bits sets)?
- * int nodes_weight(mask) Hamming weight - number of set bits
- *
- * void nodes_shift_right(dst, src, n) Shift right
- * void nodes_shift_left(dst, src, n) Shift left
- *
- * int first_node(mask) Number lowest set bit, or MAX_NUMNODES
- * int next_node(node, mask) Next node past 'node', or MAX_NUMNODES
- * int first_unset_node(mask) First node not set in mask, or
- * MAX_NUMNODES.
- *
- * nodemask_t nodemask_of_node(node) Return nodemask with bit 'node' set
- * NODE_MASK_ALL Initializer - all bits set
- * NODE_MASK_NONE Initializer - no bits set
- * unsigned long *nodes_addr(mask) Array of unsigned long's in mask
- *
- * int nodemask_scnprintf(buf, len, mask) Format nodemask for printing
- * int nodemask_parse(ubuf, ulen, mask) Parse ascii string as nodemask
- * int nodelist_scnprintf(buf, len, mask) Format nodemask as list for printing
- * int nodelist_parse(buf, map) Parse ascii string as nodelist
- *
- * for_each_node_mask(node, mask) for-loop node over mask
- *
- * int num_online_nodes() Number of online Nodes
- * int num_possible_nodes() Number of all possible Nodes
- *
- * int node_online(node) Is some node online?
- * int node_possible(node) Is some node possible?
- *
- * int any_online_node(mask) First online node in mask
- *
- * node_set_online(node) set bit 'node' in node_online_map
- * node_set_offline(node) clear bit 'node' in node_online_map
- *
- * for_each_node(node) for-loop node over node_possible_map
- * for_each_online_node(node) for-loop node over node_online_map
- *
- * Subtlety:
- * 1) The 'type-checked' form of node_isset() causes gcc (3.3.2, anyway)
- * to generate slightly worse code. So use a simple one-line #define
- * for node_isset(), instead of wrapping an inline inside a macro, the
- * way we do the other calls.
- */
- #include <linux/kernel.h>
- #include <linux/threads.h>
- #include <linux/bitmap.h>
- #include <linux/numa.h>
- #include <asm/bug.h>
- typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
- extern nodemask_t _unused_nodemask_arg_;
- #define node_set(node, dst) __node_set((node), &(dst))
- static inline void __node_set(int node, volatile nodemask_t *dstp)
- {
- set_bit(node, dstp->bits);
- }
- #define node_clear(node, dst) __node_clear((node), &(dst))
- static inline void __node_clear(int node, volatile nodemask_t *dstp)
- {
- clear_bit(node, dstp->bits);
- }
- #define nodes_setall(dst) __nodes_setall(&(dst), MAX_NUMNODES)
- static inline void __nodes_setall(nodemask_t *dstp, int nbits)
- {
- bitmap_fill(dstp->bits, nbits);
- }
- #define nodes_clear(dst) __nodes_clear(&(dst), MAX_NUMNODES)
- static inline void __nodes_clear(nodemask_t *dstp, int nbits)
- {
- bitmap_zero(dstp->bits, nbits);
- }
- /* No static inline type checking - see Subtlety (1) above. */
- #define node_isset(node, nodemask) test_bit((node), (nodemask).bits)
- #define node_test_and_set(node, nodemask)
- __node_test_and_set((node), &(nodemask))
- static inline int __node_test_and_set(int node, nodemask_t *addr)
- {
- return test_and_set_bit(node, addr->bits);
- }
- #define nodes_and(dst, src1, src2)
- __nodes_and(&(dst), &(src1), &(src2), MAX_NUMNODES)
- static inline void __nodes_and(nodemask_t *dstp, const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
- }
- #define nodes_or(dst, src1, src2)
- __nodes_or(&(dst), &(src1), &(src2), MAX_NUMNODES)
- static inline void __nodes_or(nodemask_t *dstp, const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
- }
- #define nodes_xor(dst, src1, src2)
- __nodes_xor(&(dst), &(src1), &(src2), MAX_NUMNODES)
- static inline void __nodes_xor(nodemask_t *dstp, const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
- }
- #define nodes_andnot(dst, src1, src2)
- __nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
- static inline void __nodes_andnot(nodemask_t *dstp, const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
- }
- #define nodes_complement(dst, src)
- __nodes_complement(&(dst), &(src), MAX_NUMNODES)
- static inline void __nodes_complement(nodemask_t *dstp,
- const nodemask_t *srcp, int nbits)
- {
- bitmap_complement(dstp->bits, srcp->bits, nbits);
- }
- #define nodes_equal(src1, src2)
- __nodes_equal(&(src1), &(src2), MAX_NUMNODES)
- static inline int __nodes_equal(const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- return bitmap_equal(src1p->bits, src2p->bits, nbits);
- }
- #define nodes_intersects(src1, src2)
- __nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
- static inline int __nodes_intersects(const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- return bitmap_intersects(src1p->bits, src2p->bits, nbits);
- }
- #define nodes_subset(src1, src2)
- __nodes_subset(&(src1), &(src2), MAX_NUMNODES)
- static inline int __nodes_subset(const nodemask_t *src1p,
- const nodemask_t *src2p, int nbits)
- {
- return bitmap_subset(src1p->bits, src2p->bits, nbits);
- }
- #define nodes_empty(src) __nodes_empty(&(src), MAX_NUMNODES)
- static inline int __nodes_empty(const nodemask_t *srcp, int nbits)
- {
- return bitmap_empty(srcp->bits, nbits);
- }
- #define nodes_full(nodemask) __nodes_full(&(nodemask), MAX_NUMNODES)
- static inline int __nodes_full(const nodemask_t *srcp, int nbits)
- {
- return bitmap_full(srcp->bits, nbits);
- }
- #define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
- static inline int __nodes_weight(const nodemask_t *srcp, int nbits)
- {
- return bitmap_weight(srcp->bits, nbits);
- }
- #define nodes_shift_right(dst, src, n)
- __nodes_shift_right(&(dst), &(src), (n), MAX_NUMNODES)
- static inline void __nodes_shift_right(nodemask_t *dstp,
- const nodemask_t *srcp, int n, int nbits)
- {
- bitmap_shift_right(dstp->bits, srcp->bits, n, nbits);
- }
- #define nodes_shift_left(dst, src, n)
- __nodes_shift_left(&(dst), &(src), (n), MAX_NUMNODES)
- static inline void __nodes_shift_left(nodemask_t *dstp,
- const nodemask_t *srcp, int n, int nbits)
- {
- bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
- }
- /* FIXME: better would be to fix all architectures to never return
- > MAX_NUMNODES, then the silly min_ts could be dropped. */
- #define first_node(src) __first_node(&(src))
- static inline int __first_node(const nodemask_t *srcp)
- {
- return min_t(int, MAX_NUMNODES, find_first_bit(srcp->bits, MAX_NUMNODES));
- }
- #define next_node(n, src) __next_node((n), &(src))
- static inline int __next_node(int n, const nodemask_t *srcp)
- {
- return min_t(int,MAX_NUMNODES,find_next_bit(srcp->bits, MAX_NUMNODES, n+1));
- }
- #define nodemask_of_node(node)
- ({
- typeof(_unused_nodemask_arg_) m;
- if (sizeof(m) == sizeof(unsigned long)) {
- m.bits[0] = 1UL<<(node);
- } else {
- nodes_clear(m);
- node_set((node), m);
- }
- m;
- })
- #define first_unset_node(mask) __first_unset_node(&(mask))
- static inline int __first_unset_node(const nodemask_t *maskp)
- {
- return min_t(int,MAX_NUMNODES,
- find_first_zero_bit(maskp->bits, MAX_NUMNODES));
- }
- #define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES)
- #if MAX_NUMNODES <= BITS_PER_LONG
- #define NODE_MASK_ALL
- ((nodemask_t) { {
- [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD
- } })
- #else
- #define NODE_MASK_ALL
- ((nodemask_t) { {
- [0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL,
- [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD
- } })
- #endif
- #define NODE_MASK_NONE
- ((nodemask_t) { {
- [0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] = 0UL
- } })
- #define nodes_addr(src) ((src).bits)
- #define nodemask_scnprintf(buf, len, src)
- __nodemask_scnprintf((buf), (len), &(src), MAX_NUMNODES)
- static inline int __nodemask_scnprintf(char *buf, int len,
- const nodemask_t *srcp, int nbits)
- {
- return bitmap_scnprintf(buf, len, srcp->bits, nbits);
- }
- #define nodemask_parse(ubuf, ulen, dst)
- __nodemask_parse((ubuf), (ulen), &(dst), MAX_NUMNODES)
- static inline int __nodemask_parse(const char __user *buf, int len,
- nodemask_t *dstp, int nbits)
- {
- return bitmap_parse(buf, len, dstp->bits, nbits);
- }
- #define nodelist_scnprintf(buf, len, src)
- __nodelist_scnprintf((buf), (len), &(src), MAX_NUMNODES)
- static inline int __nodelist_scnprintf(char *buf, int len,
- const nodemask_t *srcp, int nbits)
- {
- return bitmap_scnlistprintf(buf, len, srcp->bits, nbits);
- }
- #define nodelist_parse(buf, dst) __nodelist_parse((buf), &(dst), MAX_NUMNODES)
- static inline int __nodelist_parse(const char *buf, nodemask_t *dstp, int nbits)
- {
- return bitmap_parselist(buf, dstp->bits, nbits);
- }
- #if MAX_NUMNODES > 1
- #define for_each_node_mask(node, mask)
- for ((node) = first_node(mask);
- (node) < MAX_NUMNODES;
- (node) = next_node((node), (mask)))
- #else /* MAX_NUMNODES == 1 */
- #define for_each_node_mask(node, mask)
- if (!nodes_empty(mask))
- for ((node) = 0; (node) < 1; (node)++)
- #endif /* MAX_NUMNODES */
- /*
- * The following particular system nodemasks and operations
- * on them manage all possible and online nodes.
- */
- extern nodemask_t node_online_map;
- extern nodemask_t node_possible_map;
- #if MAX_NUMNODES > 1
- #define num_online_nodes() nodes_weight(node_online_map)
- #define num_possible_nodes() nodes_weight(node_possible_map)
- #define node_online(node) node_isset((node), node_online_map)
- #define node_possible(node) node_isset((node), node_possible_map)
- #else
- #define num_online_nodes() 1
- #define num_possible_nodes() 1
- #define node_online(node) ((node) == 0)
- #define node_possible(node) ((node) == 0)
- #endif
- #define any_online_node(mask)
- ({
- int node;
- for_each_node_mask(node, (mask))
- if (node_online(node))
- break;
- node;
- })
- #define node_set_online(node) set_bit((node), node_online_map.bits)
- #define node_set_offline(node) clear_bit((node), node_online_map.bits)
- #define for_each_node(node) for_each_node_mask((node), node_possible_map)
- #define for_each_online_node(node) for_each_node_mask((node), node_online_map)
- #endif /* __LINUX_NODEMASK_H */