arch/powerpc/include/asm/topology.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_TOPOLOGY_H
   3 #define _ASM_POWERPC_TOPOLOGY_H
   4 #ifdef __KERNEL__
   5
   6
   7 struct device;
   8 struct device_node;
   9
  10 #ifdef CONFIG_NUMA
  11
  12 /*
  13  * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
  14  * all zones on all nodes will be eligible for zone_reclaim().
  15  */
  16 #define RECLAIM_DISTANCE 10
  17
  18 #include <asm/mmzone.h>
  19
  20 #define cpumask_of_node(node) ((node) == -1 ?                           \
  21                                cpu_all_mask :                           \
  22                                node_to_cpumask_map[node])
  23
  24 struct pci_bus;
  25 #ifdef CONFIG_PCI
  26 extern int pcibus_to_node(struct pci_bus *bus);
  27 #else
  28 static inline int pcibus_to_node(struct pci_bus *bus)
  29 {
  30         return -1;
  31 }
  32 #endif
  33
  34 #define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  35                                  cpu_all_mask :                         \
  36                                  cpumask_of_node(pcibus_to_node(bus)))
  37
  38 extern int __node_distance(int, int);
  39 #define node_distance(a, b) __node_distance(a, b)
  40
  41 extern void __init dump_numa_cpu_topology(void);
  42
  43 extern int sysfs_add_device_to_node(struct device *dev, int nid);
  44 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  45 extern int numa_update_cpu_topology(bool cpus_locked);
  46
  47 static inline int early_cpu_to_node(int cpu)
  48 {
  49         int nid;
  50
  51         nid = numa_cpu_lookup_table[cpu];
  52
  53         /*
  54          * Fall back to node 0 if nid is unset (it should be, except bugs).
  55          * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
  56          */
  57         return (nid < 0) ? 0 : nid;
  58 }
  59 #else
  60
  61 static inline int early_cpu_to_node(int cpu) { return 0; }
  62
  63 static inline void dump_numa_cpu_topology(void) {}
  64
  65 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  66 {
  67         return 0;
  68 }
  69
  70 static inline void sysfs_remove_device_from_node(struct device *dev,
  71                                                 int nid)
  72 {
  73 }
  74
  75 static inline int numa_update_cpu_topology(bool cpus_locked)
  76 {
  77         return 0;
  78 }
  79 #endif /* CONFIG_NUMA */
  80
  81 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
  82 extern int start_topology_update(void);
  83 extern int stop_topology_update(void);
  84 extern int prrn_is_enabled(void);
  85 #else
  86 static inline int start_topology_update(void)
  87 {
  88         return 0;
  89 }
  90 static inline int stop_topology_update(void)
  91 {
  92         return 0;
  93 }
  94 static inline int prrn_is_enabled(void)
  95 {
  96         return 0;
  97 }
  98 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
  99
 100 #include <asm-generic/topology.h>
 101
 102 #ifdef CONFIG_SMP
 103 #include <asm/cputable.h>
 104
 105 #ifdef CONFIG_PPC64
 106 #include <asm/smp.h>
 107
 108 #define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 109 #define topology_sibling_cpumask(cpu)   (per_cpu(cpu_sibling_map, cpu))
 110 #define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 111 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 112 #endif
 113 #endif
 114
 115 #endif /* __KERNEL__ */
 116 #endif  /* _ASM_POWERPC_TOPOLOGY_H */