1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H
/*
* Generic SMP support
* Alan Cox. <alan@redhat.com>
*/
#include <xen/config.h>
#ifdef CONFIG_SMP
#include <asm/smp.h>
/*
* main cross-CPU interfaces, handles INIT, TLB flush, STOP, etc.
* (defined in asm header):
*/
/*
* stops all CPUs but the current one:
*/
extern void smp_send_stop(void);
extern void smp_send_event_check_mask(cpumask_t mask);
#define smp_send_event_check_cpu(cpu) \
smp_send_event_check_mask(cpumask_of_cpu(cpu))
/*
* Prepare machine for booting other CPUs.
*/
extern void smp_prepare_cpus(unsigned int max_cpus);
/*
* Bring a CPU up
*/
extern int __cpu_up(unsigned int cpunum);
/*
* Final polishing of CPUs
*/
extern void smp_cpus_done(unsigned int max_cpus);
/*
* Call a function on all other processors
*/
extern int smp_call_function(
void (*func) (void *info),
void *info,
int retry,
int wait);
/*
* Call a function on a selection of processors
*/
extern int on_selected_cpus(
cpumask_t selected,
void (*func) (void *info),
void *info,
int retry,
int wait);
/*
* Mark the boot cpu "online" so that it can call console drivers in
* printk() and can access its per-cpu storage.
*/
void smp_prepare_boot_cpu(void);
#else
/*
* These macros fold the SMP functionality into a single CPU system
*/
#define smp_send_event_check_mask(m) ((void)0)
#define smp_send_event_check_cpu(p) ((void)0)
#define raw_smp_processor_id() 0
#define hard_smp_processor_id() 0
#define smp_call_function(func,info,retry,wait) ({ do {} while (0); 0; })
#define num_booting_cpus() 1
#define smp_prepare_boot_cpu() do {} while (0)
static inline int on_selected_cpus(
cpumask_t selected,
void (*func) (void *info),
void *info,
int retry,
int wait)
{
if ( cpu_isset(0, selected) )
{
local_irq_disable();
func(info);
local_irq_enable();
}
return 0;
}
#endif
/*
* Call a function on all processors
*/
static inline int on_each_cpu(
void (*func) (void *info),
void *info,
int retry,
int wait)
{
return on_selected_cpus(cpu_online_map, func, info, retry, wait);
}
#define smp_processor_id() raw_smp_processor_id()
#endif
|
