include/asm-generic/numa.h

   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 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
  43 static inline void numa_store_cpu_info(unsigned int cpu) { }
  44 static inline void numa_add_cpu(unsigned int cpu) { }
  45 static inline void numa_remove_cpu(unsigned int cpu) { }
  46 static inline void arch_numa_init(void) { }
  47 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
  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 */