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 cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc); 39 extern int __node_distance(int, int); 40 #define node_distance(a, b) __node_distance(a, b) 41 42 extern void __init dump_numa_cpu_topology(void); 43 44 extern int sysfs_add_device_to_node(struct device *dev, int nid); 45 extern void sysfs_remove_device_from_node(struct device *dev, int nid); 46 extern int numa_update_cpu_topology(bool cpus_locked); 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 #else 66 67 static inline int early_cpu_to_node(int cpu) { return 0; } 68 69 static inline void dump_numa_cpu_topology(void) {} 70 71 static inline int sysfs_add_device_to_node(struct device *dev, int nid) 72 { 73 return 0; 74 } 75 76 static inline void sysfs_remove_device_from_node(struct device *dev, 77 int nid) 78 { 79 } 80 81 static inline int numa_update_cpu_topology(bool cpus_locked) 82 { 83 return 0; 84 } 85 86 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {} 87 88 static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) 89 { 90 return 0; 91 } 92 93 #endif /* CONFIG_NUMA */ 94 95 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) 96 extern int start_topology_update(void); 97 extern int stop_topology_update(void); 98 extern int prrn_is_enabled(void); 99 extern int find_and_online_cpu_nid(int cpu); 100 extern int timed_topology_update(int nsecs); 101 #else 102 static inline int start_topology_update(void) 103 { 104 return 0; 105 } 106 static inline int stop_topology_update(void) 107 { 108 return 0; 109 } 110 static inline int prrn_is_enabled(void) 111 { 112 return 0; 113 } 114 static inline int find_and_online_cpu_nid(int cpu) 115 { 116 return 0; 117 } 118 static inline int timed_topology_update(int nsecs) 119 { 120 return 0; 121 } 122 123 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ 124 125 #include <asm-generic/topology.h> 126 127 #ifdef CONFIG_SMP 128 #include <asm/cputable.h> 129 130 #ifdef CONFIG_PPC64 131 #include <asm/smp.h> 132 133 #ifdef CONFIG_PPC_SPLPAR 134 int get_physical_package_id(int cpu); 135 #define topology_physical_package_id(cpu) (get_physical_package_id(cpu)) 136 #else 137 #define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu)) 138 #endif 139 140 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 141 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 142 #define topology_core_id(cpu) (cpu_to_core_id(cpu)) 143 144 int dlpar_cpu_readd(int cpu); 145 #endif 146 #endif 147 148 #endif /* __KERNEL__ */ 149 #endif /* _ASM_POWERPC_TOPOLOGY_H */ 150