1#ifndef __LINUX_SMP_H
2#define __LINUX_SMP_H
3
4
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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};
24
25
26extern unsigned int total_cpus;
27
28int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
29 int wait);
30
31#ifdef CONFIG_SMP
32
33#include <linux/preempt.h>
34#include <linux/kernel.h>
35#include <linux/compiler.h>
36#include <linux/thread_info.h>
37#include <asm/smp.h>
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44
45
46
47extern void smp_send_stop(void);
48
49
50
51
52extern void smp_send_reschedule(int cpu);
53
54
55
56
57
58extern void smp_prepare_cpus(unsigned int max_cpus);
59
60
61
62
63extern int __cpu_up(unsigned int cpunum, struct task_struct *tidle);
64
65
66
67
68extern void smp_cpus_done(unsigned int max_cpus);
69
70
71
72
73int smp_call_function(smp_call_func_t func, void *info, int wait);
74void smp_call_function_many(const struct cpumask *mask,
75 smp_call_func_t func, void *info, bool wait);
76
77void __smp_call_function_single(int cpuid, struct call_single_data *data,
78 int wait);
79
80int smp_call_function_any(const struct cpumask *mask,
81 smp_call_func_t func, void *info, int wait);
82
83void kick_all_cpus_sync(void);
84
85
86
87
88#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
89void __init call_function_init(void);
90void generic_smp_call_function_single_interrupt(void);
91#define generic_smp_call_function_interrupt \
92 generic_smp_call_function_single_interrupt
93#else
94static inline void call_function_init(void) { }
95#endif
96
97
98
99
100int on_each_cpu(smp_call_func_t func, void *info, int wait);
101
102
103
104
105
106void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
107 void *info, bool wait);
108
109
110
111
112
113
114void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
115 smp_call_func_t func, void *info, bool wait,
116 gfp_t gfp_flags);
117
118
119
120
121
122void smp_prepare_boot_cpu(void);
123
124extern unsigned int setup_max_cpus;
125extern void __init setup_nr_cpu_ids(void);
126extern void __init smp_init(void);
127
128#else
129
130static inline void smp_send_stop(void) { }
131
132
133
134
135#define raw_smp_processor_id() 0
136static inline int up_smp_call_function(smp_call_func_t func, void *info)
137{
138 return 0;
139}
140#define smp_call_function(func, info, wait) \
141 (up_smp_call_function(func, info))
142#define on_each_cpu(func, info, wait) \
143 ({ \
144 unsigned long __flags; \
145 local_irq_save(__flags); \
146 func(info); \
147 local_irq_restore(__flags); \
148 0; \
149 })
150
151
152
153
154
155
156#define on_each_cpu_mask(mask, func, info, wait) \
157 do { \
158 if (cpumask_test_cpu(0, (mask))) { \
159 local_irq_disable(); \
160 (func)(info); \
161 local_irq_enable(); \
162 } \
163 } while (0)
164
165
166
167
168#define on_each_cpu_cond(cond_func, func, info, wait, gfp_flags)\
169 do { \
170 void *__info = (info); \
171 preempt_disable(); \
172 if ((cond_func)(0, __info)) { \
173 local_irq_disable(); \
174 (func)(__info); \
175 local_irq_enable(); \
176 } \
177 preempt_enable(); \
178 } while (0)
179
180static inline void smp_send_reschedule(int cpu) { }
181#define smp_prepare_boot_cpu() do {} while (0)
182#define smp_call_function_many(mask, func, info, wait) \
183 (up_smp_call_function(func, info))
184static inline void call_function_init(void) { }
185
186static inline int
187smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
188 void *info, int wait)
189{
190 return smp_call_function_single(0, func, info, wait);
191}
192
193static inline void kick_all_cpus_sync(void) { }
194
195#endif
196
197
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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