77 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_NUMA_H3#define _LINUX_NUMA_H4#include <linux/init.h>5#include <linux/types.h>6 7#ifdef CONFIG_NODES_SHIFT8#define NODES_SHIFT CONFIG_NODES_SHIFT9#else10#define NODES_SHIFT 011#endif12 13#define MAX_NUMNODES (1 << NODES_SHIFT)14 15#define NUMA_NO_NODE (-1)16#define NUMA_NO_MEMBLK (-1)17 18static inline bool numa_valid_node(int nid)19{20 return nid >= 0 && nid < MAX_NUMNODES;21}22 23/* optionally keep NUMA memory info available post init */24#ifdef CONFIG_NUMA_KEEP_MEMINFO25#define __initdata_or_meminfo26#else27#define __initdata_or_meminfo __initdata28#endif29 30#ifdef CONFIG_NUMA31#include <asm/sparsemem.h>32 33extern struct pglist_data *node_data[];34#define NODE_DATA(nid) (node_data[nid])35 36void __init alloc_node_data(int nid);37void __init alloc_offline_node_data(int nid);38 39/* Generic implementation available */40int numa_nearest_node(int node, unsigned int state);41 42#ifndef memory_add_physaddr_to_nid43int memory_add_physaddr_to_nid(u64 start);44#endif45 46#ifndef phys_to_target_node47int phys_to_target_node(u64 start);48#endif49 50int numa_fill_memblks(u64 start, u64 end);51 52#else /* !CONFIG_NUMA */53static inline int numa_nearest_node(int node, unsigned int state)54{55 return NUMA_NO_NODE;56}57 58static inline int memory_add_physaddr_to_nid(u64 start)59{60 return 0;61}62static inline int phys_to_target_node(u64 start)63{64 return 0;65}66 67static inline void alloc_offline_node_data(int nid) {}68#endif69 70#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)71 72#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP73extern const struct attribute_group arch_node_dev_group;74#endif75 76#endif /* _LINUX_NUMA_H */77