1#ifndef __LINUX_SMP_H
2#define __LINUX_SMP_H
3
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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#include <linux/llist.h>
15
16typedef void (*smp_call_func_t)(void *info);
17struct call_single_data {
18 struct llist_node llist;
19 smp_call_func_t func;
20 void *info;
21 unsigned int flags;
22};
23
24
25extern unsigned int total_cpus;
26
27int smp_call_function_single(int cpuid, smp_call_func_t func, void *info,
28 int wait);
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30
31
32
33int on_each_cpu(smp_call_func_t func, void *info, int wait);
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37
38
39void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
40 void *info, bool wait);
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44
45
46
47void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
48 smp_call_func_t func, void *info, bool wait,
49 gfp_t gfp_flags);
50
51int smp_call_function_single_async(int cpu, struct call_single_data *csd);
52
53#ifdef CONFIG_SMP
54
55#include <linux/preempt.h>
56#include <linux/kernel.h>
57#include <linux/compiler.h>
58#include <linux/thread_info.h>
59#include <asm/smp.h>
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67
68
69extern void smp_send_stop(void);
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72
73
74extern void smp_send_reschedule(int cpu);
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78
79
80extern void smp_prepare_cpus(unsigned int max_cpus);
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83
84
85extern int __cpu_up(unsigned int cpunum, struct task_struct *tidle);
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87
88
89
90extern void smp_cpus_done(unsigned int max_cpus);
91
92
93
94
95int smp_call_function(smp_call_func_t func, void *info, int wait);
96void smp_call_function_many(const struct cpumask *mask,
97 smp_call_func_t func, void *info, bool wait);
98
99int smp_call_function_any(const struct cpumask *mask,
100 smp_call_func_t func, void *info, int wait);
101
102void kick_all_cpus_sync(void);
103void wake_up_all_idle_cpus(void);
104
105
106
107
108void __init call_function_init(void);
109void generic_smp_call_function_single_interrupt(void);
110#define generic_smp_call_function_interrupt \
111 generic_smp_call_function_single_interrupt
112
113
114
115
116
117void smp_prepare_boot_cpu(void);
118
119extern unsigned int setup_max_cpus;
120extern void __init setup_nr_cpu_ids(void);
121extern void __init smp_init(void);
122
123#else
124
125static inline void smp_send_stop(void) { }
126
127
128
129
130#define raw_smp_processor_id() 0
131static inline int up_smp_call_function(smp_call_func_t func, void *info)
132{
133 return 0;
134}
135#define smp_call_function(func, info, wait) \
136 (up_smp_call_function(func, info))
137
138static inline void smp_send_reschedule(int cpu) { }
139#define smp_prepare_boot_cpu() do {} while (0)
140#define smp_call_function_many(mask, func, info, wait) \
141 (up_smp_call_function(func, info))
142static inline void call_function_init(void) { }
143
144static inline int
145smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
146 void *info, int wait)
147{
148 return smp_call_function_single(0, func, info, wait);
149}
150
151static inline void kick_all_cpus_sync(void) { }
152static inline void wake_up_all_idle_cpus(void) { }
153
154#ifdef CONFIG_UP_LATE_INIT
155extern void __init up_late_init(void);
156static inline void smp_init(void) { up_late_init(); }
157#else
158static inline void smp_init(void) { }
159#endif
160
161#endif
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177
178#ifdef CONFIG_DEBUG_PREEMPT
179 extern unsigned int debug_smp_processor_id(void);
180# define smp_processor_id() debug_smp_processor_id()
181#else
182# define smp_processor_id() raw_smp_processor_id()
183#endif
184
185#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
186#define put_cpu() preempt_enable()
187
188
189
190
191
192extern void arch_disable_smp_support(void);
193
194extern void arch_enable_nonboot_cpus_begin(void);
195extern void arch_enable_nonboot_cpus_end(void);
196
197void smp_setup_processor_id(void);
198
199#endif
200