arch/arm64/include/asm/numa.h

   1 #ifndef __ASM_NUMA_H
   2 #define __ASM_NUMA_H
   3
   4 #include <asm/topology.h>
   5
   6 #ifdef CONFIG_NUMA
   7
   8 /* currently, arm64 implements flat NUMA topology */
   9 #define parent_node(node)       (node)
  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 /* 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         return node_to_cpumask_map[node];
  27 }
  28 #endif
  29
  30 void __init arm64_numa_init(void);
  31 int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  32 void __init numa_set_distance(int from, int to, int distance);
  33 void __init numa_free_distance(void);
  34 void __init early_map_cpu_to_node(unsigned int cpu, int nid);
  35 void numa_store_cpu_info(unsigned int cpu);
  36
  37 #else   /* CONFIG_NUMA */
  38
  39 static inline void numa_store_cpu_info(unsigned int cpu) { }
  40 static inline void arm64_numa_init(void) { }
  41 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
  42
  43 #endif  /* CONFIG_NUMA */
  44
  45 #endif  /* __ASM_NUMA_H */