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
pcibus_to_node(struct pci_bus * bus)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
update_numa_cpu_lookup_table(unsigned int cpu,int node)47 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
48 {
49 numa_cpu_lookup_table[cpu] = node;
50 }
51
early_cpu_to_node(int cpu)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
early_cpu_to_node(int cpu)66 static inline int early_cpu_to_node(int cpu) { return 0; }
67
dump_numa_cpu_topology(void)68 static inline void dump_numa_cpu_topology(void) {}
69
sysfs_add_device_to_node(struct device * dev,int nid)70 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
71 {
72 return 0;
73 }
74
sysfs_remove_device_from_node(struct device * dev,int nid)75 static inline void sysfs_remove_device_from_node(struct device *dev,
76 int nid)
77 {
78 }
79
numa_update_cpu_topology(bool cpus_locked)80 static inline int numa_update_cpu_topology(bool cpus_locked)
81 {
82 return 0;
83 }
84
update_numa_cpu_lookup_table(unsigned int cpu,int node)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 extern void __init shared_proc_topology_init(void);
96 #else
start_topology_update(void)97 static inline int start_topology_update(void)
98 {
99 return 0;
100 }
stop_topology_update(void)101 static inline int stop_topology_update(void)
102 {
103 return 0;
104 }
prrn_is_enabled(void)105 static inline int prrn_is_enabled(void)
106 {
107 return 0;
108 }
find_and_online_cpu_nid(int cpu)109 static inline int find_and_online_cpu_nid(int cpu)
110 {
111 return 0;
112 }
timed_topology_update(int nsecs)113 static inline int timed_topology_update(int nsecs)
114 {
115 return 0;
116 }
117
118 #ifdef CONFIG_SMP
shared_proc_topology_init(void)119 static inline void shared_proc_topology_init(void) {}
120 #endif
121 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
122
123 #include <asm-generic/topology.h>
124
125 #ifdef CONFIG_SMP
126 #include <asm/cputable.h>
127
128 #ifdef CONFIG_PPC64
129 #include <asm/smp.h>
130
131 #define topology_physical_package_id(cpu) (cpu_to_chip_id(cpu))
132 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
133 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
134 #define topology_core_id(cpu) (cpu_to_core_id(cpu))
135 #endif
136 #endif
137
138 #endif /* __KERNEL__ */
139 #endif /* _ASM_POWERPC_TOPOLOGY_H */
140
