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 */ 117