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 #define NR_NODE_MEMBLKS         (MAX_NUMNODES * 2)
   9
  10 /* currently, arm64 implements flat NUMA topology */
  11 #define parent_node(node)       (node)
  12
  13 int __node_distance(int from, int to);
  14 #define node_distance(a, b) __node_distance(a, b)
  15
  16 extern nodemask_t numa_nodes_parsed __initdata;
  17
  18 extern bool numa_off;
  19
  20 /* Mappings between node number and cpus on that node. */
  21 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
  22 void numa_clear_node(unsigned int cpu);
  23
  24 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  25 const struct cpumask *cpumask_of_node(int node);
  26 #else
  27 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
  28 static inline const struct cpumask *cpumask_of_node(int node)
  29 {
  30         return node_to_cpumask_map[node];
  31 }
  32 #endif
  33
  34 void __init arm64_numa_init(void);
  35 int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  36 void __init numa_set_distance(int from, int to, int distance);
  37 void __init numa_free_distance(void);
  38 void __init early_map_cpu_to_node(unsigned int cpu, int nid);
  39 void numa_store_cpu_info(unsigned int cpu);
  40
  41 #else   /* CONFIG_NUMA */
  42
  43 static inline void numa_store_cpu_info(unsigned int cpu) { }
  44 static inline void arm64_numa_init(void) { }
  45 static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
  46
  47 #endif  /* CONFIG_NUMA */
  48
  49 #endif  /* __ASM_NUMA_H */