1#ifndef __LINUX_SMP_H
2#define __LINUX_SMP_H
3
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7
8
9#include <linux/errno.h>
10#include <linux/types.h>
11#include <linux/list.h>
12#include <linux/cpumask.h>
13#include <linux/init.h>
14
15extern void cpu_idle(void);
16
17typedef void (*smp_call_func_t)(void *info);
18struct call_single_data {
19 struct list_head list;
20 smp_call_func_t func;
21 void *info;
22 u16 flags;
23 u16 priv;
24};
25
26
27extern unsigned int total_cpus;
28
29int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
30 int wait);
31
32#ifdef CONFIG_SMP
33
34#include <linux/preempt.h>
35#include <linux/kernel.h>
36#include <linux/compiler.h>
37#include <linux/thread_info.h>
38#include <asm/smp.h>
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45
46
47
48extern void smp_send_stop(void);
49
50
51
52
53extern void smp_send_reschedule(int cpu);
54
55
56
57
58
59extern void smp_prepare_cpus(unsigned int max_cpus);
60
61
62
63
64extern int __cpu_up(unsigned int cpunum);
65
66
67
68
69extern void smp_cpus_done(unsigned int max_cpus);
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71
72
73
74int smp_call_function(smp_call_func_t func, void *info, int wait);
75void smp_call_function_many(const struct cpumask *mask,
76 smp_call_func_t func, void *info, bool wait);
77
78void __smp_call_function_single(int cpuid, struct call_single_data *data,
79 int wait);
80
81int smp_call_function_any(const struct cpumask *mask,
82 smp_call_func_t func, void *info, int wait);
83
84
85
86
87#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
88void __init call_function_init(void);
89void generic_smp_call_function_single_interrupt(void);
90void generic_smp_call_function_interrupt(void);
91void ipi_call_lock(void);
92void ipi_call_unlock(void);
93void ipi_call_lock_irq(void);
94void ipi_call_unlock_irq(void);
95#else
96static inline void call_function_init(void) { }
97#endif
98
99
100
101
102int on_each_cpu(smp_call_func_t func, void *info, int wait);
103
104
105
106
107
108void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
109 void *info, bool wait);
110
111
112
113
114
115
116void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
117 smp_call_func_t func, void *info, bool wait,
118 gfp_t gfp_flags);
119
120
121
122
123
124void smp_prepare_boot_cpu(void);
125
126extern unsigned int setup_max_cpus;
127extern void __init setup_nr_cpu_ids(void);
128extern void __init smp_init(void);
129
130#else
131
132static inline void smp_send_stop(void) { }
133
134
135
136
137#define raw_smp_processor_id() 0
138static inline int up_smp_call_function(smp_call_func_t func, void *info)
139{
140 return 0;
141}
142#define smp_call_function(func, info, wait) \
143 (up_smp_call_function(func, info))
144#define on_each_cpu(func,info,wait) \
145 ({ \
146 local_irq_disable(); \
147 func(info); \
148 local_irq_enable(); \
149 0; \
150 })
151
152
153
154
155
156
157#define on_each_cpu_mask(mask, func, info, wait) \
158 do { \
159 if (cpumask_test_cpu(0, (mask))) { \
160 local_irq_disable(); \
161 (func)(info); \
162 local_irq_enable(); \
163 } \
164 } while (0)
165
166
167
168
169#define on_each_cpu_cond(cond_func, func, info, wait, gfp_flags)\
170 do { \
171 void *__info = (info); \
172 preempt_disable(); \
173 if ((cond_func)(0, __info)) { \
174 local_irq_disable(); \
175 (func)(__info); \
176 local_irq_enable(); \
177 } \
178 preempt_enable(); \
179 } while (0)
180
181static inline void smp_send_reschedule(int cpu) { }
182#define num_booting_cpus() 1
183#define smp_prepare_boot_cpu() do {} while (0)
184#define smp_call_function_many(mask, func, info, wait) \
185 (up_smp_call_function(func, info))
186static inline void call_function_init(void) { }
187
188static inline int
189smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
190 void *info, int wait)
191{
192 return smp_call_function_single(0, func, info, wait);
193}
194
195#endif
196
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210
211
212#ifdef CONFIG_DEBUG_PREEMPT
213 extern unsigned int debug_smp_processor_id(void);
214# define smp_processor_id() debug_smp_processor_id()
215#else
216# define smp_processor_id() raw_smp_processor_id()
217#endif
218
219#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
220#define put_cpu() preempt_enable()
221
222
223
224
225
226extern void arch_disable_smp_support(void);
227
228void smp_setup_processor_id(void);
229
230#endif
231