[linux-2.6-block.git] / include / linux / numa.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NUMA_H
#define _LINUX_NUMA_H
#include <linux/init.h>
#include <linux/types.h>

#ifdef CONFIG_NODES_SHIFT
#define NODES_SHIFT     CONFIG_NODES_SHIFT
#else
#define NODES_SHIFT     0
#endif

#define MAX_NUMNODES    (1 << NODES_SHIFT)

#define	NUMA_NO_NODE	(-1)
#define	NUMA_NO_MEMBLK	(-1)

/* optionally keep NUMA memory info available post init */
#ifdef CONFIG_NUMA_KEEP_MEMINFO
#define __initdata_or_meminfo
#else
#define __initdata_or_meminfo __initdata
#endif

#ifdef CONFIG_NUMA
#include <asm/sparsemem.h>

/* Generic implementation available */
int numa_nearest_node(int node, unsigned int state);

#ifndef memory_add_physaddr_to_nid
int memory_add_physaddr_to_nid(u64 start);
#endif

#ifndef phys_to_target_node
int phys_to_target_node(u64 start);
#endif

#ifndef numa_fill_memblks
static inline int __init numa_fill_memblks(u64 start, u64 end)
{
	return NUMA_NO_MEMBLK;
}
#endif

#else /* !CONFIG_NUMA */
static inline int numa_nearest_node(int node, unsigned int state)
{
	return NUMA_NO_NODE;
}

static inline int memory_add_physaddr_to_nid(u64 start)
{
	return 0;
}
static inline int phys_to_target_node(u64 start)
{
	return 0;
}
#endif

#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)

#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
extern const struct attribute_group arch_node_dev_group;
#endif

#endif /* _LINUX_NUMA_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_NUMA_H
1da177e4 LT	3	#define _LINUX_NUMA_H
d7a73e3f	4	#include <linux/init.h>
5d30f92e	5	#include <linux/types.h>
1da177e4	6
c80d79d7 YG	7	#ifdef CONFIG_NODES_SHIFT
	8	#define NODES_SHIFT CONFIG_NODES_SHIFT
	9	#else
1da177e4 LT	10	#define NODES_SHIFT 0
	11	#endif
	12
	13	#define MAX_NUMNODES (1 << NODES_SHIFT)
	14
4e25b257	15	#define NUMA_NO_NODE (-1)
8f012db2	16	#define NUMA_NO_MEMBLK (-1)
4e25b257	17
1e5d8e1e DW	18	/* optionally keep NUMA memory info available post init */
	19	#ifdef CONFIG_NUMA_KEEP_MEMINFO
	20	#define __initdata_or_meminfo
	21	#else
	22	#define __initdata_or_meminfo __initdata
	23	#endif
	24
b2ca916c	25	#ifdef CONFIG_NUMA
a927bd6b DW	26	#include <asm/sparsemem.h>
a927bd6b DW	27
5d30f92e	28	/* Generic implementation available */
b1f099b1	29	int numa_nearest_node(int node, unsigned int state);
a927bd6b DW	30
a927bd6b DW	31	#ifndef memory_add_physaddr_to_nid
d7a73e3f	32	int memory_add_physaddr_to_nid(u64 start);
a927bd6b	33	#endif
d7a73e3f	34
a927bd6b	35	#ifndef phys_to_target_node
d7a73e3f	36	int phys_to_target_node(u64 start);
a927bd6b	37	#endif
d7a73e3f	38
8f012db2 AS	39	#ifndef numa_fill_memblks
	40	static inline int __init numa_fill_memblks(u64 start, u64 end)
	41	{
	42	return NUMA_NO_MEMBLK;
	43	}
	44	#endif
d7a73e3f	45
a927bd6b	46	#else /* !CONFIG_NUMA */
b1f099b1	47	static inline int numa_nearest_node(int node, unsigned int state)
b2ca916c DW	48	{
	49	return NUMA_NO_NODE;
	50	}
b1f099b1	51
a927bd6b DW	52	static inline int memory_add_physaddr_to_nid(u64 start)
	53	{
	54	return 0;
	55	}
	56	static inline int phys_to_target_node(u64 start)
	57	{
	58	return 0;
	59	}
b2ca916c DW	60	#endif
b2ca916c DW	61
b1f099b1 YN	62	#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)
b1f099b1 YN	63
50468e43 JS	64	#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
	65	extern const struct attribute_group arch_node_dev_group;
	66	#endif
	67
1da177e4	68	#endif /* _LINUX_NUMA_H */