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 extern void __init shared_proc_topology_init(void);
102 #else
103 static inline int start_topology_update(void)
104 {
105 	return 0;
106 }
107 static inline int stop_topology_update(void)
108 {
109 	return 0;
110 }
111 static inline int prrn_is_enabled(void)
112 {
113 	return 0;
114 }
115 static inline int find_and_online_cpu_nid(int cpu)
116 {
117 	return 0;
118 }
119 static inline int timed_topology_update(int nsecs)
120 {
121 	return 0;
122 }
123 
124 #ifdef CONFIG_SMP
125 static inline void shared_proc_topology_init(void) {}
126 #endif
127 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
128 
129 #include <asm-generic/topology.h>
130 
131 #ifdef CONFIG_SMP
132 #include <asm/cputable.h>
133 
134 #ifdef CONFIG_PPC64
135 #include <asm/smp.h>
136 
137 #define topology_physical_package_id(cpu)	(cpu_to_chip_id(cpu))
138 #define topology_sibling_cpumask(cpu)	(per_cpu(cpu_sibling_map, cpu))
139 #define topology_core_cpumask(cpu)	(per_cpu(cpu_core_map, cpu))
140 #define topology_core_id(cpu)		(cpu_to_core_id(cpu))
141 
142 int dlpar_cpu_readd(int cpu);
143 #endif
144 #endif
145 
146 #endif /* __KERNEL__ */
147 #endif	/* _ASM_POWERPC_TOPOLOGY_H */
148