1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_NUMA_H 3 #define __ASM_NUMA_H 4 5 #include <asm/topology.h> 6 7 #ifdef CONFIG_NUMA 8 9 #define NR_NODE_MEMBLKS (MAX_NUMNODES * 2) 10 11 int __node_distance(int from, int to); 12 #define node_distance(a, b) __node_distance(a, b) 13 14 extern nodemask_t numa_nodes_parsed __initdata; 15 16 extern bool numa_off; 17 18 /* Mappings between node number and cpus on that node. */ 19 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 20 void numa_clear_node(unsigned int cpu); 21 22 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 23 const struct cpumask *cpumask_of_node(int node); 24 #else 25 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 26 static inline const struct cpumask *cpumask_of_node(int node) 27 { 28 return node_to_cpumask_map[node]; 29 } 30 #endif 31 32 void __init arm64_numa_init(void); 33 int __init numa_add_memblk(int nodeid, u64 start, u64 end); 34 void __init numa_set_distance(int from, int to, int distance); 35 void __init numa_free_distance(void); 36 void __init early_map_cpu_to_node(unsigned int cpu, int nid); 37 void numa_store_cpu_info(unsigned int cpu); 38 39 #else /* CONFIG_NUMA */ 40 41 static inline void numa_store_cpu_info(unsigned int cpu) { } 42 static inline void arm64_numa_init(void) { } 43 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } 44 45 #endif /* CONFIG_NUMA */ 46 47 #endif /* __ASM_NUMA_H */ 48