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 #include <asm/mmzone.h>
  12
  13 static inline int cpu_to_node(int cpu)
  14 {
  15         return numa_cpu_lookup_table[cpu];
  16 }
  17
  18 #define parent_node(node)       (node)
  19
  20 static inline cpumask_t node_to_cpumask(int node)
  21 {
  22         return numa_cpumask_lookup_table[node];
  23 }
  24
  25 static inline int node_to_first_cpu(int node)
  26 {
  27         cpumask_t tmp;
  28         tmp = node_to_cpumask(node);
  29         return first_cpu(tmp);
  30 }
  31
  32 int of_node_to_nid(struct device_node *device);
  33
  34 struct pci_bus;
  35 #ifdef CONFIG_PCI
  36 extern int pcibus_to_node(struct pci_bus *bus);
  37 #else
  38 static inline int pcibus_to_node(struct pci_bus *bus)
  39 {
  40         return -1;
  41 }
  42 #endif
  43
  44 #define pcibus_to_cpumask(bus)  (pcibus_to_node(bus) == -1 ? \
  45                                         CPU_MASK_ALL : \
  46                                         node_to_cpumask(pcibus_to_node(bus)) \
  47                                 )
  48
  49 /* sched_domains SD_NODE_INIT for PPC64 machines */
  50 #define SD_NODE_INIT (struct sched_domain) {            \
  51         .span                   = CPU_MASK_NONE,        \
  52         .parent                 = NULL,                 \
  53         .child                  = NULL,                 \
  54         .groups                 = NULL,                 \
  55         .min_interval           = 8,                    \
  56         .max_interval           = 32,                   \
  57         .busy_factor            = 32,                   \
  58         .imbalance_pct          = 125,                  \
  59         .cache_nice_tries       = 1,                    \
  60         .busy_idx               = 3,                    \
  61         .idle_idx               = 1,                    \
  62         .newidle_idx            = 2,                    \
  63         .wake_idx               = 1,                    \
  64         .flags                  = SD_LOAD_BALANCE       \
  65                                 | SD_BALANCE_EXEC       \
  66                                 | SD_BALANCE_NEWIDLE    \
  67                                 | SD_WAKE_IDLE          \
  68                                 | SD_SERIALIZE          \
  69                                 | SD_WAKE_BALANCE,      \
  70         .last_balance           = jiffies,              \
  71         .balance_interval       = 1,                    \
  72         .nr_balance_failed      = 0,                    \
  73 }
  74
  75 extern void __init dump_numa_cpu_topology(void);
  76
  77 extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
  78 extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
  79
  80 #else
  81
  82 static inline int of_node_to_nid(struct device_node *device)
  83 {
  84         return 0;
  85 }
  86
  87 static inline void dump_numa_cpu_topology(void) {}
  88
  89 static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
  90 {
  91         return 0;
  92 }
  93
  94 static inline void sysfs_remove_device_from_node(struct sys_device *dev,
  95                                                 int nid)
  96 {
  97 }
  98
  99 #endif /* CONFIG_NUMA */
 100
 101 #include <asm-generic/topology.h>
 102
 103 #ifdef CONFIG_SMP
 104 #include <asm/cputable.h>
 105 #define smt_capable()           (cpu_has_feature(CPU_FTR_SMT))
 106
 107 #ifdef CONFIG_PPC64
 108 #include <asm/smp.h>
 109
 110 #define topology_thread_siblings(cpu)   (per_cpu(cpu_sibling_map, cpu))
 111 #define topology_core_siblings(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 */