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 struct drmem_lmb;
  10
  11 #ifdef CONFIG_NUMA
  12
  13 /*
  14  * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
  15  * all zones on all nodes will be eligible for zone_reclaim().
  16  */
  17 #define RECLAIM_DISTANCE 10
  18
  19 #include <asm/mmzone.h>
  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 cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
  40 extern int __node_distance(int, int);
  41 #define node_distance(a, b) __node_distance(a, b)
  42
  43 extern void __init dump_numa_cpu_topology(void);
  44
  45 extern int sysfs_add_device_to_node(struct device *dev, int nid);
  46 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  47
  48 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
  49 {
  50         numa_cpu_lookup_table[cpu] = node;
  51 }
  52
  53 static inline int early_cpu_to_node(int cpu)
  54 {
  55         int nid;
  56
  57         nid = numa_cpu_lookup_table[cpu];
  58
  59         /*
  60          * Fall back to node 0 if nid is unset (it should be, except bugs).
  61          * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
  62          */
  63         return (nid < 0) ? 0 : nid;
  64 }
  65
  66 int of_drconf_to_nid_single(struct drmem_lmb *lmb);
  67
  68 #else
  69
  70 static inline int early_cpu_to_node(int cpu) { return 0; }
  71
  72 static inline void dump_numa_cpu_topology(void) {}
  73
  74 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  75 {
  76         return 0;
  77 }
  78
  79 static inline void sysfs_remove_device_from_node(struct device *dev,
  80                                                 int nid)
  81 {
  82 }
  83
  84 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
  85
  86 static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
  87 {
  88         return 0;
  89 }
  90
  91 static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
  92 {
  93         return first_online_node;
  94 }
  95
  96 #endif /* CONFIG_NUMA */
  97
  98 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
  99 extern int find_and_online_cpu_nid(int cpu);
 100 extern int cpu_to_coregroup_id(int cpu);
 101 #else
 102 static inline int find_and_online_cpu_nid(int cpu)
 103 {
 104         return 0;
 105 }
 106
 107 static inline int cpu_to_coregroup_id(int cpu)
 108 {
 109 #ifdef CONFIG_SMP
 110         return cpu_to_core_id(cpu);
 111 #else
 112         return 0;
 113 #endif
 114 }
 115
 116 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 117
 118 #include <asm-generic/topology.h>
 119
 120 #ifdef CONFIG_SMP
 121 #include <asm/cputable.h>
 122
 123 #ifdef CONFIG_PPC64
 124 #include <asm/smp.h>
 125
 126 #define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 127
 128 #define topology_sibling_cpumask(cpu)   (per_cpu(cpu_sibling_map, cpu))
 129 #define topology_core_cpumask(cpu)      (cpu_cpu_mask(cpu))
 130 #define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 131
 132 #endif
 133 #endif
 134
 135 #endif /* __KERNEL__ */
 136 #endif  /* _ASM_POWERPC_TOPOLOGY_H */