LXR linux/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
   7struct device;
   8struct device_node;
   9struct 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
  25struct pci_bus;
  26#ifdef CONFIG_PCI
  27extern int pcibus_to_node(struct pci_bus *bus);
  28#else
  29static 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
  39int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
  40extern int __node_distance(int, int);
  41#define node_distance(a, b) __node_distance(a, b)
  42
  43extern void __init dump_numa_cpu_topology(void);
  44
  45extern int sysfs_add_device_to_node(struct device *dev, int nid);
  46extern void sysfs_remove_device_from_node(struct device *dev, int nid);
  47
  48static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
  49{
  50        numa_cpu_lookup_table[cpu] = node;
  51}
  52
  53static 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
  66int of_drconf_to_nid_single(struct drmem_lmb *lmb);
  67void update_numa_distance(struct device_node *node);
  68
  69extern void map_cpu_to_node(int cpu, int node);
  70#ifdef CONFIG_HOTPLUG_CPU
  71extern void unmap_cpu_from_node(unsigned long cpu);
  72#endif /* CONFIG_HOTPLUG_CPU */
  73
  74#else
  75
  76static inline int early_cpu_to_node(int cpu) { return 0; }
  77
  78static inline void dump_numa_cpu_topology(void) {}
  79
  80static inline int sysfs_add_device_to_node(struct device *dev, int nid)
  81{
  82        return 0;
  83}
  84
  85static inline void sysfs_remove_device_from_node(struct device *dev,
  86                                                int nid)
  87{
  88}
  89
  90static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
  91
  92static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
  93{
  94        return 0;
  95}
  96
  97static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
  98{
  99        return first_online_node;
 100}
 101
 102static inline void update_numa_distance(struct device_node *node) {}
 103
 104#ifdef CONFIG_SMP
 105static inline void map_cpu_to_node(int cpu, int node) {}
 106#ifdef CONFIG_HOTPLUG_CPU
 107static inline void unmap_cpu_from_node(unsigned long cpu) {}
 108#endif /* CONFIG_HOTPLUG_CPU */
 109#endif /* CONFIG_SMP */
 110
 111#endif /* CONFIG_NUMA */
 112
 113#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
 114extern int find_and_online_cpu_nid(int cpu);
 115extern int cpu_to_coregroup_id(int cpu);
 116#else
 117static inline int find_and_online_cpu_nid(int cpu)
 118{
 119        return 0;
 120}
 121
 122static inline int cpu_to_coregroup_id(int cpu)
 123{
 124#ifdef CONFIG_SMP
 125        return cpu_to_core_id(cpu);
 126#else
 127        return 0;
 128#endif
 129}
 130
 131#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
 132
 133#include <asm-generic/topology.h>
 134
 135#ifdef CONFIG_SMP
 136#include <asm/cputable.h>
 137
 138#ifdef CONFIG_PPC64
 139#include <asm/smp.h>
 140
 141#define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
 142
 143#define topology_sibling_cpumask(cpu)   (per_cpu(cpu_sibling_map, cpu))
 144#define topology_core_cpumask(cpu)      (per_cpu(cpu_core_map, cpu))
 145#define topology_core_id(cpu)           (cpu_to_core_id(cpu))
 146
 147#endif
 148#endif
 149
 150#endif /* __KERNEL__ */
 151#endif  /* _ASM_POWERPC_TOPOLOGY_H */
 152