1
2#ifndef __LINUX_SMP_H
3#define __LINUX_SMP_H
4
5
6
7
8
9
10#include <linux/errno.h>
11#include <linux/types.h>
12#include <linux/list.h>
13#include <linux/cpumask.h>
14#include <linux/init.h>
15#include <linux/llist.h>
16
17typedef void (*smp_call_func_t)(void *info);
18struct __call_single_data {
19 struct llist_node llist;
20 smp_call_func_t func;
21 void *info;
22 unsigned int flags;
23};
24
25
26typedef struct __call_single_data call_single_data_t
27 __aligned(sizeof(struct __call_single_data));
28
29
30extern unsigned int total_cpus;
31
32int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
33 int wait);
34
35
36
37
38int on_each_cpu(smp_call_func_t func, void *info, int wait);
39
40
41
42
43
44void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
45 void *info, bool wait);
46
47
48
49
50
51
52void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
53 smp_call_func_t func, void *info, bool wait,
54 gfp_t gfp_flags);
55
56void on_each_cpu_cond_mask(bool (*cond_func)(int cpu, void *info),
57 smp_call_func_t func, void *info, bool wait,
58 gfp_t gfp_flags, const struct cpumask *mask);
59
60int smp_call_function_single_async(int cpu, call_single_data_t *csd);
61
62#ifdef CONFIG_SMP
63
64#include <linux/preempt.h>
65#include <linux/kernel.h>
66#include <linux/compiler.h>
67#include <linux/thread_info.h>
68#include <asm/smp.h>
69
70
71
72
73
74
75
76
77
78extern void smp_send_stop(void);
79
80
81
82
83extern void smp_send_reschedule(int cpu);
84
85
86
87
88
89extern void smp_prepare_cpus(unsigned int max_cpus);
90
91
92
93
94extern int __cpu_up(unsigned int cpunum, struct task_struct *tidle);
95
96
97
98
99extern void smp_cpus_done(unsigned int max_cpus);
100
101
102
103
104int smp_call_function(smp_call_func_t func, void *info, int wait);
105void smp_call_function_many(const struct cpumask *mask,
106 smp_call_func_t func, void *info, bool wait);
107
108int smp_call_function_any(const struct cpumask *mask,
109 smp_call_func_t func, void *info, int wait);
110
111void kick_all_cpus_sync(void);
112void wake_up_all_idle_cpus(void);
113
114
115
116
117void __init call_function_init(void);
118void generic_smp_call_function_single_interrupt(void);
119#define generic_smp_call_function_interrupt \
120 generic_smp_call_function_single_interrupt
121
122
123
124
125
126void smp_prepare_boot_cpu(void);
127
128extern unsigned int setup_max_cpus;
129extern void __init setup_nr_cpu_ids(void);
130extern void __init smp_init(void);
131
132extern int __boot_cpu_id;
133
134static inline int get_boot_cpu_id(void)
135{
136 return __boot_cpu_id;
137}
138
139#else
140
141static inline void smp_send_stop(void) { }
142
143
144
145
146#define raw_smp_processor_id() 0
147static inline int up_smp_call_function(smp_call_func_t func, void *info)
148{
149 return 0;
150}
151#define smp_call_function(func, info, wait) \
152 (up_smp_call_function(func, info))
153
154static inline void smp_send_reschedule(int cpu) { }
155#define smp_prepare_boot_cpu() do {} while (0)
156#define smp_call_function_many(mask, func, info, wait) \
157 (up_smp_call_function(func, info))
158static inline void call_function_init(void) { }
159
160static inline int
161smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
162 void *info, int wait)
163{
164 return smp_call_function_single(0, func, info, wait);
165}
166
167static inline void kick_all_cpus_sync(void) { }
168static inline void wake_up_all_idle_cpus(void) { }
169
170#ifdef CONFIG_UP_LATE_INIT
171extern void __init up_late_init(void);
172static inline void smp_init(void) { up_late_init(); }
173#else
174static inline void smp_init(void) { }
175#endif
176
177static inline int get_boot_cpu_id(void)
178{
179 return 0;
180}
181
182#endif
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199#ifdef CONFIG_DEBUG_PREEMPT
200 extern unsigned int debug_smp_processor_id(void);
201# define smp_processor_id() debug_smp_processor_id()
202#else
203# define smp_processor_id() raw_smp_processor_id()
204#endif
205
206#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
207#define put_cpu() preempt_enable()
208
209
210
211
212
213extern void arch_disable_smp_support(void);
214
215extern void arch_enable_nonboot_cpus_begin(void);
216extern void arch_enable_nonboot_cpus_end(void);
217
218void smp_setup_processor_id(void);
219
220int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par,
221 bool phys);
222
223
224int smpcfd_prepare_cpu(unsigned int cpu);
225int smpcfd_dead_cpu(unsigned int cpu);
226int smpcfd_dying_cpu(unsigned int cpu);
227
228#endif
229