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  * Before going off node we want the VM to try and reclaim from the local
  13  * node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
  14  * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
  15  * 20, we never reclaim and go off node straight away.
  16  *
  17  * To fix this we choose a smaller value of RECLAIM_DISTANCE.
  18  */
  19 #define RECLAIM_DISTANCE 10
  20
  21 #include <asm/mmzone.h>
  22
  23 static inline int cpu_to_node(int cpu)
  24 {
  25         int nid;
  26
  27         nid = numa_cpu_lookup_table[cpu];
  28
  29         /*
  30          * During early boot, the numa-cpu lookup table might not have been
  31          * setup for all CPUs yet. In such cases, default to node 0.
  32          */
  33         return (nid < 0) ? 0 : nid;
  34 }
  35
  36 #define parent_node(node)       (node)
  37
  38 #define cpumask_of_node(node) ((node) == -1 ?                           \
  39                                cpu_all_mask :                           \
  40                                node_to_cpumask_map[node])
  41
  42 struct pci_bus;
  43 #ifdef CONFIG_PCI
  44 extern int pcibus_to_node(struct pci_bus *bus);
  45 #else
  46 static inline int pcibus_to_node(struct pci_bus *bus)
  47 {
  48         return -1;
  49 }
  50 #endif
  51
  52 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  53                                  cpu_all_mask :                         \
  54                                  cpumask_of_node(pcibus_to_node(bus)))
  55
  56 extern int __node_distance(int, int);
  57 #define node_distance(a, b) __node_distance(a, b)
  58
  59 extern void __init dump_numa_cpu_topology(void);
  60
  61 extern int sysfs_add_device_to_node(struct device *dev, int nid);
  62 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  63
  64 #else
  65
  66 static inline void dump_numa_cpu_topology(void) {}
  67
  68 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  69 {
  70         return 0;
  71 }
  72
  73 static inline void sysfs_remove_device_from_node(struct device *dev,
  74                                                 int nid)
  75 {
  76 }
  77 #endif /* CONFIG_NUMA */
  78
  79 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
  80 extern int start_topology_update(void);
  81 extern int stop_topology_update(void);
  82 extern int prrn_is_enabled(void);
  83 #else
  84 static inline int start_topology_update(void)
  85 {
  86         return 0;
  87 }
  88 static inline int stop_topology_update(void)
  89 {
  90         return 0;
  91 }
  92 static inline int prrn_is_enabled(void)
  93 {
  94         return 0;
  95 }
  96 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
  97
  98 #include <asm-generic/topology.h>
  99
 100 #ifdef CONFIG_SMP
 101 #include <asm/cputable.h>
 102 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 103
 104 #ifdef CONFIG_PPC64
 105 #include <asm/smp.h>
 106
 107 #define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 108 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 109 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 110 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 111 #endif
 112 #endif
 113
 114 #endif /* __KERNEL__ */
 115 #endif  /* _ASM_POWERPC_TOPOLOGY_H */