arch/x86/include/asm/numa.h

   1 #ifndef _ASM_X86_NUMA_H
   2 #define _ASM_X86_NUMA_H
   3
   4 #include <linux/nodemask.h>
   5
   6 #include <asm/topology.h>
   7 #include <asm/apicdef.h>
   8
   9 #ifdef CONFIG_NUMA
  10
  11 #define NR_NODE_MEMBLKS         (MAX_NUMNODES*2)
  12
  13 /*
  14  * Too small node sizes may confuse the VM badly. Usually they
  15  * result from BIOS bugs. So dont recognize nodes as standalone
  16  * NUMA entities that have less than this amount of RAM listed:
  17  */
  18 #define NODE_MIN_SIZE (4*1024*1024)
  19
  20 extern int numa_off;
  21
  22 /*
  23  * __apicid_to_node[] stores the raw mapping between physical apicid and
  24  * node and is used to initialize cpu_to_node mapping.
  25  *
  26  * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
  27  * should be accessed by the accessors - set_apicid_to_node() and
  28  * numa_cpu_node().
  29  */
  30 extern s16 __apicid_to_node[MAX_LOCAL_APIC];
  31 extern nodemask_t numa_nodes_parsed __initdata;
  32
  33 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  34 extern void __init numa_set_distance(int from, int to, int distance);
  35
  36 static inline void set_apicid_to_node(int apicid, s16 node)
  37 {
  38         __apicid_to_node[apicid] = node;
  39 }
  40
  41 extern int numa_cpu_node(int cpu);
  42
  43 #else   /* CONFIG_NUMA */
  44 static inline void set_apicid_to_node(int apicid, s16 node)
  45 {
  46 }
  47
  48 static inline int numa_cpu_node(int cpu)
  49 {
  50         return NUMA_NO_NODE;
  51 }
  52 #endif  /* CONFIG_NUMA */
  53
  54 #ifdef CONFIG_X86_32
  55 # include <asm/numa_32.h>
  56 #endif
  57
  58 #ifdef CONFIG_NUMA
  59 extern void numa_set_node(int cpu, int node);
  60 extern void numa_clear_node(int cpu);
  61 extern void __init init_cpu_to_node(void);
  62 extern void numa_add_cpu(int cpu);
  63 extern void numa_remove_cpu(int cpu);
  64 #else   /* CONFIG_NUMA */
  65 static inline void numa_set_node(int cpu, int node)     { }
  66 static inline void numa_clear_node(int cpu)             { }
  67 static inline void init_cpu_to_node(void)               { }
  68 static inline void numa_add_cpu(int cpu)                { }
  69 static inline void numa_remove_cpu(int cpu)             { }
  70 #endif  /* CONFIG_NUMA */
  71
  72 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  73 void debug_cpumask_set_cpu(int cpu, int node, bool enable);
  74 #endif
  75
  76 #ifdef CONFIG_NUMA_EMU
  77 #define FAKE_NODE_MIN_SIZE      ((u64)32 << 20)
  78 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
  79 void numa_emu_cmdline(char *);
  80 #endif /* CONFIG_NUMA_EMU */
  81
  82 #endif  /* _ASM_X86_NUMA_H */