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 7 #ifdef CONFIG_NODES_SHIFT 8 #define NODES_SHIFT CONFIG_NODES_SHIFT 9 #else 10 #define NODES_SHIFT 0 11 #endif 12 13 #define MAX_NUMNODES (1 << NODES_SHIFT) 14 15 #define NUMA_NO_NODE (-1) 16 #define NUMA_NO_MEMBLK (-1) 17 numa_valid_node(int nid)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_MEMINFO 25 #define __initdata_or_meminfo 26 #else 27 #define __initdata_or_meminfo __initdata 28 #endif 29 30 #ifdef CONFIG_NUMA 31 #include <asm/sparsemem.h> 32 33 /* Generic implementation available */ 34 int numa_nearest_node(int node, unsigned int state); 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 memory_add_physaddr_to_nid(u64 start)52static inline int memory_add_physaddr_to_nid(u64 start) 53 { 54 return 0; 55 } phys_to_target_node(u64 start)56static inline int phys_to_target_node(u64 start) 57 { 58 return 0; 59 } 60 #endif 61 62 #define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE) 63 64 #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP 65 extern const struct attribute_group arch_node_dev_group; 66 #endif 67 68 #endif /* _LINUX_NUMA_H */ 69