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 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 25 #ifdef CONFIG_NUMA 26 #include <asm/sparsemem.h> 27 28 /* Generic implementation available */ 29 int numa_nearest_node(int node, unsigned int state); 30 31 #ifndef memory_add_physaddr_to_nid 32 int memory_add_physaddr_to_nid(u64 start); 33 #endif 34 35 #ifndef phys_to_target_node 36 int phys_to_target_node(u64 start); 37 #endif 38 39 int numa_fill_memblks(u64 start, u64 end); 40 41 #else /* !CONFIG_NUMA */ numa_nearest_node(int node,unsigned int state)42static inline int numa_nearest_node(int node, unsigned int state) 43 { 44 return NUMA_NO_NODE; 45 } 46 memory_add_physaddr_to_nid(u64 start)47static inline int memory_add_physaddr_to_nid(u64 start) 48 { 49 return 0; 50 } phys_to_target_node(u64 start)51static inline int phys_to_target_node(u64 start) 52 { 53 return 0; 54 } 55 #endif 56 57 #define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE) 58 59 #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP 60 extern const struct attribute_group arch_node_dev_group; 61 #endif 62 63 #endif /* _LINUX_NUMA_H */ 64