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
9int __node_distance(int from, int to);
10#define node_distance(a, b) __node_distance(a, b)
11
12extern nodemask_t numa_nodes_parsed __initdata;
13
14extern bool numa_off;
15
16/* Mappings between node number and cpus on that node. */
17extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
18void numa_clear_node(unsigned int cpu);
19
20#ifdef CONFIG_DEBUG_PER_CPU_MAPS
21const struct cpumask *cpumask_of_node(int node);
22#else
23/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
24static 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
33void __init arch_numa_init(void);
34int __init numa_add_memblk(int nodeid, u64 start, u64 end);
35void __init numa_set_distance(int from, int to, int distance);
36void __init numa_free_distance(void);
37void __init early_map_cpu_to_node(unsigned int cpu, int nid);
38int __init early_cpu_to_node(int cpu);
39void numa_store_cpu_info(unsigned int cpu);
40void numa_add_cpu(unsigned int cpu);
41void numa_remove_cpu(unsigned int cpu);
42
43#else	/* CONFIG_NUMA */
44
45static inline void numa_store_cpu_info(unsigned int cpu) { }
46static inline void numa_add_cpu(unsigned int cpu) { }
47static inline void numa_remove_cpu(unsigned int cpu) { }
48static inline void arch_numa_init(void) { }
49static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
50static inline int early_cpu_to_node(int cpu) { return 0; }
51
52#endif	/* CONFIG_NUMA */
53
54#endif	/* __ASM_GENERIC_NUMA_H */
55