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 sys_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         return numa_cpu_lookup_table[cpu];
  26 }
  27
  28 #define parent_node(node)       (node)
  29
  30 #define cpumask_of_node(node) ((node) == -1 ?                           \
  31                                cpu_all_mask :                           \
  32                                &numa_cpumask_lookup_table[node])
  33
  34 int of_node_to_nid(struct device_node *device);
  35
  36 struct pci_bus;
  37 #ifdef CONFIG_PCI
  38 extern int pcibus_to_node(struct pci_bus *bus);
  39 #else
  40 static inline int pcibus_to_node(struct pci_bus *bus)
  41 {
  42         return -1;
  43 }
  44 #endif
  45
  46 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  47                                  cpu_all_mask :                         \
  48                                  cpumask_of_node(pcibus_to_node(bus)))
  49
  50 /* sched_domains SD_NODE_INIT for PPC64 machines */
  51 #define SD_NODE_INIT (struct sched_domain) {                            \
  52         .min_interval           = 8,                                    \
  53         .max_interval           = 32,                                   \
  54         .busy_factor            = 32,                                   \
  55         .imbalance_pct          = 125,                                  \
  56         .cache_nice_tries       = 1,                                    \
  57         .busy_idx               = 3,                                    \
  58         .idle_idx               = 1,                                    \
  59         .newidle_idx            = 0,                                    \
  60         .wake_idx               = 0,                                    \
  61         .forkexec_idx           = 0,                                    \
  62                                                                         \
  63         .flags                  = 1*SD_LOAD_BALANCE                     \
  64                                 | 1*SD_BALANCE_NEWIDLE                  \
  65                                 | 1*SD_BALANCE_EXEC                     \
  66                                 | 1*SD_BALANCE_FORK                     \
  67                                 | 0*SD_BALANCE_WAKE                     \
  68                                 | 0*SD_WAKE_AFFINE                      \
  69                                 | 0*SD_PREFER_LOCAL                     \
  70                                 | 0*SD_SHARE_CPUPOWER                   \
  71                                 | 0*SD_POWERSAVINGS_BALANCE             \
  72                                 | 0*SD_SHARE_PKG_RESOURCES              \
  73                                 | 1*SD_SERIALIZE                        \
  74                                 | 0*SD_PREFER_SIBLING                   \
  75                                 ,                                       \
  76         .last_balance           = jiffies,                              \
  77         .balance_interval       = 1,                                    \
  78 }
  79
  80 extern void __init dump_numa_cpu_topology(void);
  81
  82 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
  83 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
  84
  85 #else
  86
  87 static inline int of_node_to_nid(struct device_node *device)
  88 {
  89         return 0;
  90 }
  91
  92 static inline void dump_numa_cpu_topology(void) {}
  93
  94 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
  95 {
  96         return 0;
  97 }
  98
  99 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
 100                                                 int nid)
 101 {
 102 }
 103
 104 #endif /* CONFIG_NUMA */
 105
 106 #include <asm-generic/topology.h>
 107
 108 #ifdef CONFIG_SMP
 109 #include <asm/cputable.h>
 110 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 111
 112 #ifdef CONFIG_PPC64
 113 #include <asm/smp.h>
 114
 115 #define topology_thread_cpumask(cpu)    (per_cpu(cpu_sibling_map, cpu))
 116 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 117 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 118 #endif
 119 #endif
 120
 121 #endif /* __KERNEL__ */
 122 #endif  /* _ASM_POWERPC_TOPOLOGY_H */