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 void update_numa_cpu_lookup_table(unsigned int cpu, int node) 48 { 49 numa_cpu_lookup_table[cpu] = node; 50 } 51 52 static inline int early_cpu_to_node(int cpu) 53 { 54 int nid; 55 56 nid = numa_cpu_lookup_table[cpu]; 57 58 /* 59 * Fall back to node 0 if nid is unset (it should be, except bugs). 60 * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)). 61 */ 62 return (nid < 0) ? 0 : nid; 63 } 64 #else 65 66 static inline int early_cpu_to_node(int cpu) { return 0; } 67 68 static inline void dump_numa_cpu_topology(void) {} 69 70 static inline int sysfs_add_device_to_node(struct device *dev, int nid) 71 { 72 return 0; 73 } 74 75 static inline void sysfs_remove_device_from_node(struct device *dev, 76 int nid) 77 { 78 } 79 80 static inline int numa_update_cpu_topology(bool cpus_locked) 81 { 82 return 0; 83 } 84 85 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {} 86 87 #endif /* CONFIG_NUMA */ 88 89 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) 90 extern int start_topology_update(void); 91 extern int stop_topology_update(void); 92 extern int prrn_is_enabled(void); 93 extern int find_and_online_cpu_nid(int cpu); 94 extern int timed_topology_update(int nsecs); 95 #else 96 static inline int start_topology_update(void) 97 { 98 return 0; 99 } 100 static inline int stop_topology_update(void) 101 { 102 return 0; 103 } 104 static inline int prrn_is_enabled(void) 105 { 106 return 0; 107 } 108 static inline int find_and_online_cpu_nid(int cpu) 109 { 110 return 0; 111 } 112 static inline int timed_topology_update(int nsecs) 113 { 114 return 0; 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 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 128 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 129 #define topology_core_id(cpu) (cpu_to_core_id(cpu)) 130 #endif 131 #endif 132 133 #endif /* __KERNEL__ */ 134 #endif /* _ASM_POWERPC_TOPOLOGY_H */ 135