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 #define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
  13
  14 /*
  15  * Too small node sizes may confuse the VM badly. Usually they
  16  * result from BIOS bugs. So dont recognize nodes as standalone
  17  * NUMA entities that have less than this amount of RAM listed:
  18  */
  19 #define NODE_MIN_SIZE (4*1024*1024)
  20
  21 extern int numa_off;
  22
  23 /*
  24  * __apicid_to_node[] stores the raw mapping between physical apicid and
  25  * node and is used to initialize cpu_to_node mapping.
  26  *
  27  * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
  28  * should be accessed by the accessors - set_apicid_to_node() and
  29  * numa_cpu_node().
  30  */
  31 extern s16 __apicid_to_node[MAX_LOCAL_APIC];
  32 extern nodemask_t numa_nodes_parsed __initdata;
  33
  34 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  35 extern void __init numa_set_distance(int from, int to, int distance);
  36
  37 static inline void set_apicid_to_node(int apicid, s16 node)
  38 {
  39         __apicid_to_node[apicid] = node;
  40 }
  41
  42 extern int __cpuinit numa_cpu_node(int cpu);
  43
  44 #else   /* CONFIG_NUMA */
  45 static inline void set_apicid_to_node(int apicid, s16 node)
  46 {
  47 }
  48
  49 static inline int numa_cpu_node(int cpu)
  50 {
  51         return NUMA_NO_NODE;
  52 }
  53 #endif  /* CONFIG_NUMA */
  54
  55 #ifdef CONFIG_X86_32
  56 # include "numa_32.h"
  57 #else
  58 # include "numa_64.h"
  59 #endif
  60
  61 #ifdef CONFIG_NUMA
  62 extern void __cpuinit numa_set_node(int cpu, int node);
  63 extern void __cpuinit numa_clear_node(int cpu);
  64 extern void __init init_cpu_to_node(void);
  65 extern void __cpuinit numa_add_cpu(int cpu);
  66 extern void __cpuinit numa_remove_cpu(int cpu);
  67 #else   /* CONFIG_NUMA */
  68 static inline void numa_set_node(int cpu, int node)     { }
  69 static inline void numa_clear_node(int cpu)             { }
  70 static inline void init_cpu_to_node(void)               { }
  71 static inline void numa_add_cpu(int cpu)                { }
  72 static inline void numa_remove_cpu(int cpu)             { }
  73 #endif  /* CONFIG_NUMA */
  74
  75 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  76 void debug_cpumask_set_cpu(int cpu, int node, bool enable);
  77 #endif
  78
  79 #ifdef CONFIG_NUMA_EMU
  80 #define FAKE_NODE_MIN_SIZE      ((u64)32 << 20)
  81 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
  82 void numa_emu_cmdline(char *);
  83 #endif /* CONFIG_NUMA_EMU */
  84
  85 #endif  /* _ASM_X86_NUMA_H */