LXR linux/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
  20extern 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 */
  30extern s16 __apicid_to_node[MAX_LOCAL_APIC];
  31extern nodemask_t numa_nodes_parsed __initdata;
  32
  33extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  34extern void __init numa_set_distance(int from, int to, int distance);
  35
  36static inline void set_apicid_to_node(int apicid, s16 node)
  37{
  38        __apicid_to_node[apicid] = node;
  39}
  40
  41extern int numa_cpu_node(int cpu);
  42
  43#else   /* CONFIG_NUMA */
  44static inline void set_apicid_to_node(int apicid, s16 node)
  45{
  46}
  47
  48static 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
  59extern void numa_set_node(int cpu, int node);
  60extern void numa_clear_node(int cpu);
  61extern void __init init_cpu_to_node(void);
  62extern void numa_add_cpu(int cpu);
  63extern void numa_remove_cpu(int cpu);
  64#else   /* CONFIG_NUMA */
  65static inline void numa_set_node(int cpu, int node)     { }
  66static inline void numa_clear_node(int cpu)             { }
  67static inline void init_cpu_to_node(void)               { }
  68static inline void numa_add_cpu(int cpu)                { }
  69static inline void numa_remove_cpu(int cpu)             { }
  70#endif  /* CONFIG_NUMA */
  71
  72#ifdef CONFIG_DEBUG_PER_CPU_MAPS
  73void 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))
  79void numa_emu_cmdline(char *);
  80#endif /* CONFIG_NUMA_EMU */
  81
  82#endif  /* _ASM_X86_NUMA_H */
  83