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27#ifndef _LINUX_TOPOLOGY_H
28#define _LINUX_TOPOLOGY_H
29
30#include <linux/arch_topology.h>
31#include <linux/cpumask.h>
32#include <linux/bitops.h>
33#include <linux/mmzone.h>
34#include <linux/smp.h>
35#include <linux/percpu.h>
36#include <asm/topology.h>
37
38#ifndef nr_cpus_node
39#define nr_cpus_node(node) cpumask_weight(cpumask_of_node(node))
40#endif
41
42#define for_each_node_with_cpus(node) \
43 for_each_online_node(node) \
44 if (nr_cpus_node(node))
45
46int arch_update_cpu_topology(void);
47
48
49#define LOCAL_DISTANCE 10
50#define REMOTE_DISTANCE 20
51#define DISTANCE_BITS 8
52#ifndef node_distance
53#define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
54#endif
55#ifndef RECLAIM_DISTANCE
56
57
58
59
60
61
62#define RECLAIM_DISTANCE 30
63#endif
64
65
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71
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73
74
75
76extern int __read_mostly node_reclaim_distance;
77
78#ifndef PENALTY_FOR_NODE_WITH_CPUS
79#define PENALTY_FOR_NODE_WITH_CPUS (1)
80#endif
81
82#ifdef CONFIG_USE_PERCPU_NUMA_NODE_ID
83DECLARE_PER_CPU(int, numa_node);
84
85#ifndef numa_node_id
86
87static inline int numa_node_id(void)
88{
89 return raw_cpu_read(numa_node);
90}
91#endif
92
93#ifndef cpu_to_node
94static inline int cpu_to_node(int cpu)
95{
96 return per_cpu(numa_node, cpu);
97}
98#endif
99
100#ifndef set_numa_node
101static inline void set_numa_node(int node)
102{
103 this_cpu_write(numa_node, node);
104}
105#endif
106
107#ifndef set_cpu_numa_node
108static inline void set_cpu_numa_node(int cpu, int node)
109{
110 per_cpu(numa_node, cpu) = node;
111}
112#endif
113
114#else
115
116
117#ifndef numa_node_id
118static inline int numa_node_id(void)
119{
120 return cpu_to_node(raw_smp_processor_id());
121}
122#endif
123
124#endif
125
126#ifdef CONFIG_HAVE_MEMORYLESS_NODES
127
128
129
130
131
132
133DECLARE_PER_CPU(int, _numa_mem_);
134
135#ifndef set_numa_mem
136static inline void set_numa_mem(int node)
137{
138 this_cpu_write(_numa_mem_, node);
139}
140#endif
141
142#ifndef numa_mem_id
143
144static inline int numa_mem_id(void)
145{
146 return raw_cpu_read(_numa_mem_);
147}
148#endif
149
150#ifndef cpu_to_mem
151static inline int cpu_to_mem(int cpu)
152{
153 return per_cpu(_numa_mem_, cpu);
154}
155#endif
156
157#ifndef set_cpu_numa_mem
158static inline void set_cpu_numa_mem(int cpu, int node)
159{
160 per_cpu(_numa_mem_, cpu) = node;
161}
162#endif
163
164#else
165
166#ifndef numa_mem_id
167
168static inline int numa_mem_id(void)
169{
170 return numa_node_id();
171}
172#endif
173
174#ifndef cpu_to_mem
175static inline int cpu_to_mem(int cpu)
176{
177 return cpu_to_node(cpu);
178}
179#endif
180
181#endif
182
183#ifndef topology_physical_package_id
184#define topology_physical_package_id(cpu) ((void)(cpu), -1)
185#endif
186#ifndef topology_die_id
187#define topology_die_id(cpu) ((void)(cpu), -1)
188#endif
189#ifndef topology_core_id
190#define topology_core_id(cpu) ((void)(cpu), 0)
191#endif
192#ifndef topology_sibling_cpumask
193#define topology_sibling_cpumask(cpu) cpumask_of(cpu)
194#endif
195#ifndef topology_core_cpumask
196#define topology_core_cpumask(cpu) cpumask_of(cpu)
197#endif
198#ifndef topology_die_cpumask
199#define topology_die_cpumask(cpu) cpumask_of(cpu)
200#endif
201
202#if defined(CONFIG_SCHED_SMT) && !defined(cpu_smt_mask)
203static inline const struct cpumask *cpu_smt_mask(int cpu)
204{
205 return topology_sibling_cpumask(cpu);
206}
207#endif
208
209static inline const struct cpumask *cpu_cpu_mask(int cpu)
210{
211 return cpumask_of_node(cpu_to_node(cpu));
212}
213
214
215#endif
216