arch/powerpc/include/asm/topology.h

   1 #ifndef _ASM_POWERPC_TOPOLOGY_H
   2 #define _ASM_POWERPC_TOPOLOGY_H
   3 #ifdef __KERNEL__
   4
   5
   6 struct device;
   7 struct device_node;
   8
   9 #ifdef CONFIG_NUMA
  10
  11 /*
  12  * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
  13  * all zones on all nodes will be eligible for zone_reclaim().
  14  */
  15 #define RECLAIM_DISTANCE 10
  16
  17 #include <asm/mmzone.h>
  18
  19 #define parent_node(node)       (node)
  20
  21 #define cpumask_of_node(node) ((node) == -1 ?                           \
  22                                cpu_all_mask :                           \
  23                                node_to_cpumask_map[node])
  24
  25 struct pci_bus;
  26 #ifdef CONFIG_PCI
  27 extern int pcibus_to_node(struct pci_bus *bus);
  28 #else
  29 static inline int pcibus_to_node(struct pci_bus *bus)
  30 {
  31         return -1;
  32 }
  33 #endif
  34
  35 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  36                                  cpu_all_mask :                         \
  37                                  cpumask_of_node(pcibus_to_node(bus)))
  38
  39 extern int __node_distance(int, int);
  40 #define node_distance(a, b) __node_distance(a, b)
  41
  42 extern void __init dump_numa_cpu_topology(void);
  43
  44 extern int sysfs_add_device_to_node(struct device *dev, int nid);
  45 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  46 extern int numa_update_cpu_topology(bool cpus_locked);
  47
  48 static inline int early_cpu_to_node(int cpu)
  49 {
  50         int nid;
  51
  52         nid = numa_cpu_lookup_table[cpu];
  53
  54         /*
  55          * Fall back to node 0 if nid is unset (it should be, except bugs).
  56          * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
  57          */
  58         return (nid < 0) ? 0 : nid;
  59 }
  60 #else
  61
  62 static inline int early_cpu_to_node(int cpu) { return 0; }
  63
  64 static inline void dump_numa_cpu_topology(void) {}
  65
  66 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  67 {
  68         return 0;
  69 }
  70
  71 static inline void sysfs_remove_device_from_node(struct device *dev,
  72                                                 int nid)
  73 {
  74 }
  75
  76 static inline int numa_update_cpu_topology(bool cpus_locked)
  77 {
  78         return 0;
  79 }
  80 #endif /* CONFIG_NUMA */
  81
  82 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
  83 extern int start_topology_update(void);
  84 extern int stop_topology_update(void);
  85 extern int prrn_is_enabled(void);
  86 #else
  87 static inline int start_topology_update(void)
  88 {
  89         return 0;
  90 }
  91 static inline int stop_topology_update(void)
  92 {
  93         return 0;
  94 }
  95 static inline int prrn_is_enabled(void)
  96 {
  97         return 0;
  98 }
  99 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 100
 101 #include <asm-generic/topology.h>
 102
 103 #ifdef CONFIG_SMP
 104 #include <asm/cputable.h>
 105
 106 #ifdef CONFIG_PPC64
 107 #include <asm/smp.h>
 108
 109 #define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 110 #define topology_sibling_cpumask(cpu)   (per_cpu(cpu_sibling_map, cpu))
 111 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 112 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 113 #endif
 114 #endif
 115
 116 #endif /* __KERNEL__ */
 117 #endif  /* _ASM_POWERPC_TOPOLOGY_H */