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
14extern void cpu_idle(void);
15
16typedef void (*smp_call_func_t)(void *info);
17struct call_single_data {
18 struct list_head list;
19 smp_call_func_t func;
20 void *info;
21 u16 flags;
22 u16 priv;
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>
38
39
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41
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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);
64
65
66
67
68extern void smp_cpus_done(unsigned int max_cpus);
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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
83
84
85
86#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
87void generic_smp_call_function_single_interrupt(void);
88void generic_smp_call_function_interrupt(void);
89void ipi_call_lock(void);
90void ipi_call_unlock(void);
91void ipi_call_lock_irq(void);
92void ipi_call_unlock_irq(void);
93#endif
94
95
96
97
98int on_each_cpu(smp_call_func_t func, void *info, int wait);
99
100#define MSG_ALL_BUT_SELF 0x8000
101#define MSG_ALL 0x8001
102
103#define MSG_INVALIDATE_TLB 0x0001
104#define MSG_STOP_CPU 0x0002
105
106
107#define MSG_RESCHEDULE 0x0003
108#define MSG_CALL_FUNCTION 0x0004
109
110
111
112
113
114void smp_prepare_boot_cpu(void);
115
116extern unsigned int setup_max_cpus;
117
118#else
119
120static inline void smp_send_stop(void) { }
121
122
123
124
125#define raw_smp_processor_id() 0
126static inline int up_smp_call_function(smp_call_func_t func, void *info)
127{
128 return 0;
129}
130#define smp_call_function(func, info, wait) \
131 (up_smp_call_function(func, info))
132#define on_each_cpu(func,info,wait) \
133 ({ \
134 local_irq_disable(); \
135 func(info); \
136 local_irq_enable(); \
137 0; \
138 })
139static inline void smp_send_reschedule(int cpu) { }
140#define num_booting_cpus() 1
141#define smp_prepare_boot_cpu() do {} while (0)
142#define smp_call_function_many(mask, func, info, wait) \
143 (up_smp_call_function(func, info))
144static inline void init_call_single_data(void) { }
145
146static inline int
147smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
148 void *info, int wait)
149{
150 return smp_call_function_single(0, func, info, wait);
151}
152
153#endif
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168
169
170#ifdef CONFIG_DEBUG_PREEMPT
171 extern unsigned int debug_smp_processor_id(void);
172# define smp_processor_id() debug_smp_processor_id()
173#else
174# define smp_processor_id() raw_smp_processor_id()
175#endif
176
177#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
178#define put_cpu() preempt_enable()
179
180
181
182
183
184extern void arch_disable_smp_support(void);
185
186void smp_setup_processor_id(void);
187
188#endif
189