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'. */
cpumask_of_node(int 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 early_map_cpu_to_node(unsigned int cpu, int nid);
36 int early_cpu_to_node(int cpu);
37 void numa_store_cpu_info(unsigned int cpu);
38 void numa_add_cpu(unsigned int cpu);
39 void numa_remove_cpu(unsigned int cpu);
40
41 #else /* CONFIG_NUMA */
42
numa_store_cpu_info(unsigned int cpu)43 static inline void numa_store_cpu_info(unsigned int cpu) { }
numa_add_cpu(unsigned int cpu)44 static inline void numa_add_cpu(unsigned int cpu) { }
numa_remove_cpu(unsigned int cpu)45 static inline void numa_remove_cpu(unsigned int cpu) { }
arch_numa_init(void)46 static inline void arch_numa_init(void) { }
early_map_cpu_to_node(unsigned int cpu,int nid)47 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
early_cpu_to_node(int cpu)48 static inline int early_cpu_to_node(int cpu) { return 0; }
49
50 #endif /* CONFIG_NUMA */
51
52 #ifdef CONFIG_NUMA_EMU
53 void debug_cpumask_set_cpu(unsigned int cpu, int node, bool enable);
54 #endif
55
56 #endif /* __ASM_GENERIC_NUMA_H */
57