1 #ifndef _ASM_POWERPC_TOPOLOGY_H 2 #define _ASM_POWERPC_TOPOLOGY_H 3 #ifdef __KERNEL__ 4 5 6 struct device; 7 struct device_node; 8 9 #ifdef CONFIG_NUMA 10 11 /* 12 * Before going off node we want the VM to try and reclaim from the local 13 * node. It does this if the remote distance is larger than RECLAIM_DISTANCE. 14 * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of 15 * 20, we never reclaim and go off node straight away. 16 * 17 * To fix this we choose a smaller value of RECLAIM_DISTANCE. 18 */ 19 #define RECLAIM_DISTANCE 10 20 21 #include <asm/mmzone.h> 22 23 static inline int cpu_to_node(int cpu) 24 { 25 return numa_cpu_lookup_table[cpu]; 26 } 27 28 #define parent_node(node) (node) 29 30 #define cpumask_of_node(node) ((node) == -1 ? \ 31 cpu_all_mask : \ 32 node_to_cpumask_map[node]) 33 34 struct pci_bus; 35 #ifdef CONFIG_PCI 36 extern int pcibus_to_node(struct pci_bus *bus); 37 #else 38 static inline int pcibus_to_node(struct pci_bus *bus) 39 { 40 return -1; 41 } 42 #endif 43 44 #define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \ 45 cpu_all_mask : \ 46 cpumask_of_node(pcibus_to_node(bus))) 47 48 extern int __node_distance(int, int); 49 #define node_distance(a, b) __node_distance(a, b) 50 51 extern void __init dump_numa_cpu_topology(void); 52 53 extern int sysfs_add_device_to_node(struct device *dev, int nid); 54 extern void sysfs_remove_device_from_node(struct device *dev, int nid); 55 56 #else 57 58 static inline void dump_numa_cpu_topology(void) {} 59 60 static inline int sysfs_add_device_to_node(struct device *dev, int nid) 61 { 62 return 0; 63 } 64 65 static inline void sysfs_remove_device_from_node(struct device *dev, 66 int nid) 67 { 68 } 69 #endif /* CONFIG_NUMA */ 70 71 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) 72 extern int start_topology_update(void); 73 extern int stop_topology_update(void); 74 extern int prrn_is_enabled(void); 75 #else 76 static inline int start_topology_update(void) 77 { 78 return 0; 79 } 80 static inline int stop_topology_update(void) 81 { 82 return 0; 83 } 84 static inline int prrn_is_enabled(void) 85 { 86 return 0; 87 } 88 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ 89 90 #include <asm-generic/topology.h> 91 92 #ifdef CONFIG_SMP 93 #include <asm/cputable.h> 94 #define smt_capable() (cpu_has_feature(CPU_FTR_SMT)) 95 96 #ifdef CONFIG_PPC64 97 #include <asm/smp.h> 98 99 #define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 100 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 101 #define topology_core_id(cpu) (cpu_to_core_id(cpu)) 102 #endif 103 #endif 104 105 #endif /* __KERNEL__ */ 106 #endif /* _ASM_POWERPC_TOPOLOGY_H */ 107