arch/arm64/include/asm/numa.h

   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         if (node == NUMA_NO_NODE)
  29                 return cpu_all_mask;
  30
  31         return node_to_cpumask_map[node];
  32 }
  33 #endif
  34
  35 void __init arm64_numa_init(void);
  36 int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  37 void __init numa_set_distance(int from, int to, int distance);
  38 void __init numa_free_distance(void);
  39 void __init early_map_cpu_to_node(unsigned int cpu, int nid);
  40 void numa_store_cpu_info(unsigned int cpu);
  41 void numa_add_cpu(unsigned int cpu);
  42 void numa_remove_cpu(unsigned int cpu);
  43
  44 #else   /* CONFIG_NUMA */
  45
  46 static inline void numa_store_cpu_info(unsigned int cpu) { }
  47 static inline void numa_add_cpu(unsigned int cpu) { }
  48 static inline void numa_remove_cpu(unsigned int cpu) { }
  49 static inline void arm64_numa_init(void) { }
  50 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
  51
  52 #endif  /* CONFIG_NUMA */
  53
  54 #endif  /* __ASM_NUMA_H */