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 struct drmem_lmb;
10 
11 #ifdef CONFIG_NUMA
12 
13 /*
14  * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
15  * all zones on all nodes will be eligible for zone_reclaim().
16  */
17 #define RECLAIM_DISTANCE 10
18 
19 #include <asm/mmzone.h>
20 
21 #define cpumask_of_node(node) ((node) == -1 ?				\
22 			       cpu_all_mask :				\
23 			       node_to_cpumask_map[node])
24 
25 struct pci_bus;
26 #ifdef CONFIG_PCI
27 extern int pcibus_to_node(struct pci_bus *bus);
28 #else
29 static inline int pcibus_to_node(struct pci_bus *bus)
30 {
31 	return -1;
32 }
33 #endif
34 
35 #define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
36 				 cpu_all_mask :				\
37 				 cpumask_of_node(pcibus_to_node(bus)))
38 
39 extern int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
40 extern int __node_distance(int, int);
41 #define node_distance(a, b) __node_distance(a, b)
42 
43 extern void __init dump_numa_cpu_topology(void);
44 
45 extern int sysfs_add_device_to_node(struct device *dev, int nid);
46 extern void sysfs_remove_device_from_node(struct device *dev, int nid);
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 
66 int of_drconf_to_nid_single(struct drmem_lmb *lmb);
67 
68 #else
69 
70 static inline int early_cpu_to_node(int cpu) { return 0; }
71 
72 static inline void dump_numa_cpu_topology(void) {}
73 
74 static inline int sysfs_add_device_to_node(struct device *dev, int nid)
75 {
76 	return 0;
77 }
78 
79 static inline void sysfs_remove_device_from_node(struct device *dev,
80 						int nid)
81 {
82 }
83 
84 static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}
85 
86 static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
87 {
88 	return 0;
89 }
90 
91 static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
92 {
93 	return first_online_node;
94 }
95 
96 #endif /* CONFIG_NUMA */
97 
98 #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
99 extern int find_and_online_cpu_nid(int cpu);
100 extern int cpu_to_coregroup_id(int cpu);
101 #else
102 static inline int find_and_online_cpu_nid(int cpu)
103 {
104 	return 0;
105 }
106 
107 static inline int cpu_to_coregroup_id(int cpu)
108 {
109 #ifdef CONFIG_SMP
110 	return cpu_to_core_id(cpu);
111 #else
112 	return 0;
113 #endif
114 }
115 
116 #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
117 
118 #include <asm-generic/topology.h>
119 
120 #ifdef CONFIG_SMP
121 #include <asm/cputable.h>
122 
123 #ifdef CONFIG_PPC64
124 #include <asm/smp.h>
125 
126 #define topology_physical_package_id(cpu)	(cpu_to_chip_id(cpu))
127 
128 #define topology_sibling_cpumask(cpu)	(per_cpu(cpu_sibling_map, cpu))
129 #define topology_core_cpumask(cpu)	(cpu_cpu_mask(cpu))
130 #define topology_core_id(cpu)		(cpu_to_core_id(cpu))
131 
132 #endif
133 #endif
134 
135 #endif /* __KERNEL__ */
136 #endif	/* _ASM_POWERPC_TOPOLOGY_H */
137