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 #else
95 static inline int start_topology_update(void)
96 {
97 	return 0;
98 }
99 static inline int stop_topology_update(void)
100 {
101 	return 0;
102 }
103 static inline int prrn_is_enabled(void)
104 {
105 	return 0;
106 }
107 static inline int find_and_online_cpu_nid(int cpu)
108 {
109 	return 0;
110 }
111 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
112 
113 #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_NEED_MULTIPLE_NODES)
114 #if defined(CONFIG_PPC_SPLPAR)
115 extern int timed_topology_update(int nsecs);
116 #else
117 #define	timed_topology_update(nsecs)
118 #endif /* CONFIG_PPC_SPLPAR */
119 #endif /* CONFIG_HOTPLUG_CPU || CONFIG_NEED_MULTIPLE_NODES */
120 
121 #include <asm-generic/topology.h>
122 
123 #ifdef CONFIG_SMP
124 #include <asm/cputable.h>
125 
126 #ifdef CONFIG_PPC64
127 #include <asm/smp.h>
128 
129 #define topology_physical_package_id(cpu)	(cpu_to_chip_id(cpu))
130 #define topology_sibling_cpumask(cpu)	(per_cpu(cpu_sibling_map, cpu))
131 #define topology_core_cpumask(cpu)	(per_cpu(cpu_core_map, cpu))
132 #define topology_core_id(cpu)		(cpu_to_core_id(cpu))
133 #endif
134 #endif
135 
136 #endif /* __KERNEL__ */
137 #endif	/* _ASM_POWERPC_TOPOLOGY_H */
138