1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_GENERIC_NUMA_H 3 #define __ASM_GENERIC_NUMA_H 4 5 #ifdef CONFIG_NUMA 6 7 #define NR_NODE_MEMBLKS (MAX_NUMNODES * 2) 8 9 int __node_distance(int from, int to); 10 #define node_distance(a, b) __node_distance(a, b) 11 12 extern nodemask_t numa_nodes_parsed __initdata; 13 14 extern bool numa_off; 15 16 /* Mappings between node number and cpus on that node. */ 17 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 18 void numa_clear_node(unsigned int cpu); 19 20 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 21 const struct cpumask *cpumask_of_node(int node); 22 #else 23 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 24 static inline const struct cpumask *cpumask_of_node(int node) 25 { 26 if (node == NUMA_NO_NODE) 27 return cpu_all_mask; 28 29 return node_to_cpumask_map[node]; 30 } 31 #endif 32 33 void __init arch_numa_init(void); 34 int __init numa_add_memblk(int nodeid, u64 start, u64 end); 35 void __init numa_set_distance(int from, int to, int distance); 36 void __init numa_free_distance(void); 37 void __init early_map_cpu_to_node(unsigned int cpu, int nid); 38 void numa_store_cpu_info(unsigned int cpu); 39 void numa_add_cpu(unsigned int cpu); 40 void numa_remove_cpu(unsigned int cpu); 41 42 #else /* CONFIG_NUMA */ 43 44 static inline void numa_store_cpu_info(unsigned int cpu) { } 45 static inline void numa_add_cpu(unsigned int cpu) { } 46 static inline void numa_remove_cpu(unsigned int cpu) { } 47 static inline void arch_numa_init(void) { } 48 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } 49 50 #endif /* CONFIG_NUMA */ 51 52 #endif /* __ASM_GENERIC_NUMA_H */ 53