1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_NUMA_H 3 #define _LINUX_NUMA_H 4 #include <linux/init.h> 5 #include <linux/types.h> 6 #include <linux/nodemask.h> 7 8 #define NUMA_NO_MEMBLK (-1) 9 numa_valid_node(int nid)10static inline bool numa_valid_node(int nid) 11 { 12 return nid >= 0 && nid < MAX_NUMNODES; 13 } 14 15 /* optionally keep NUMA memory info available post init */ 16 #ifdef CONFIG_NUMA_KEEP_MEMINFO 17 #define __initdata_or_meminfo 18 #else 19 #define __initdata_or_meminfo __initdata 20 #endif 21 22 #ifdef CONFIG_NUMA 23 #include <asm/sparsemem.h> 24 25 extern struct pglist_data *node_data[]; 26 #define NODE_DATA(nid) (node_data[nid]) 27 28 void __init alloc_node_data(int nid); 29 void __init alloc_offline_node_data(int nid); 30 31 /* Generic implementation available */ 32 int numa_nearest_node(int node, unsigned int state); 33 34 int nearest_node_nodemask(int node, nodemask_t *mask); 35 36 #ifndef memory_add_physaddr_to_nid 37 int memory_add_physaddr_to_nid(u64 start); 38 #endif 39 40 #ifndef phys_to_target_node 41 int phys_to_target_node(u64 start); 42 #endif 43 44 int numa_fill_memblks(u64 start, u64 end); 45 46 #else /* !CONFIG_NUMA */ numa_nearest_node(int node,unsigned int state)47static inline int numa_nearest_node(int node, unsigned int state) 48 { 49 return NUMA_NO_NODE; 50 } 51 nearest_node_nodemask(int node,nodemask_t * mask)52static inline int nearest_node_nodemask(int node, nodemask_t *mask) 53 { 54 return NUMA_NO_NODE; 55 } 56 memory_add_physaddr_to_nid(u64 start)57static inline int memory_add_physaddr_to_nid(u64 start) 58 { 59 return 0; 60 } phys_to_target_node(u64 start)61static inline int phys_to_target_node(u64 start) 62 { 63 return 0; 64 } 65 alloc_offline_node_data(int nid)66static inline void alloc_offline_node_data(int nid) {} 67 #endif 68 69 #define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE) 70 71 #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP 72 extern const struct attribute_group arch_node_dev_group; 73 #endif 74 75 #endif /* _LINUX_NUMA_H */ 76