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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
3#ifndef __ASSEMBLY__
4#include <linux/cpumask.h>
5#include <linux/init.h>
6#include <asm/percpu.h>
7
8/*
9 * We need the APIC definitions automatically as part of 'smp.h'
10 */
11#ifdef CONFIG_X86_LOCAL_APIC
12# include <asm/mpspec.h>
13# include <asm/apic.h>
14# ifdef CONFIG_X86_IO_APIC
15# include <asm/io_apic.h>
16# endif
17#endif
18#include <asm/thread_info.h>
19#include <asm/cpumask.h>
20
21extern int smp_num_siblings;
22extern unsigned int num_processors;
23
24DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
25DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
26DECLARE_PER_CPU(u16, cpu_llc_id);
27DECLARE_PER_CPU(int, cpu_number);
28
29static inline struct cpumask *cpu_sibling_mask(int cpu)
30{
31 return per_cpu(cpu_sibling_map, cpu);
32}
33
34static inline struct cpumask *cpu_core_mask(int cpu)
35{
36 return per_cpu(cpu_core_map, cpu);
37}
38
39DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
40DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
41
42/* Static state in head.S used to set up a CPU */
43extern struct {
44 void *sp;
45 unsigned short ss;
46} stack_start;
47
48struct smp_ops {
49 void (*smp_prepare_boot_cpu)(void);
50 void (*smp_prepare_cpus)(unsigned max_cpus);
51 void (*smp_cpus_done)(unsigned max_cpus);
52
53 void (*stop_other_cpus)(int wait);
54 void (*smp_send_reschedule)(int cpu);
55
56 int (*cpu_up)(unsigned cpu);
57 int (*cpu_disable)(void);
58 void (*cpu_die)(unsigned int cpu);
59 void (*play_dead)(void);
60
61 void (*send_call_func_ipi)(const struct cpumask *mask);
62 void (*send_call_func_single_ipi)(int cpu);
63};
64
65/* Globals due to paravirt */
66extern void set_cpu_sibling_map(int cpu);
67
68#ifdef CONFIG_SMP
69#ifndef CONFIG_PARAVIRT
70#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
71#endif
72extern struct smp_ops smp_ops;
73
74static inline void smp_send_stop(void)
75{
76 smp_ops.stop_other_cpus(0);
77}
78
79static inline void stop_other_cpus(void)
80{
81 smp_ops.stop_other_cpus(1);
82}
83
84static inline void smp_prepare_boot_cpu(void)
85{
86 smp_ops.smp_prepare_boot_cpu();
87}
88
89static inline void smp_prepare_cpus(unsigned int max_cpus)
90{
91 smp_ops.smp_prepare_cpus(max_cpus);
92}
93
94static inline void smp_cpus_done(unsigned int max_cpus)
95{
96 smp_ops.smp_cpus_done(max_cpus);
97}
98
99static inline int __cpu_up(unsigned int cpu)
100{
101 return smp_ops.cpu_up(cpu);
102}
103
104static inline int __cpu_disable(void)
105{
106 return smp_ops.cpu_disable();
107}
108
109static inline void __cpu_die(unsigned int cpu)
110{
111 smp_ops.cpu_die(cpu);
112}
113
114static inline void play_dead(void)
115{
116 smp_ops.play_dead();
117}
118
119static inline void smp_send_reschedule(int cpu)
120{
121 smp_ops.smp_send_reschedule(cpu);
122}
123
124static inline void arch_send_call_function_single_ipi(int cpu)
125{
126 smp_ops.send_call_func_single_ipi(cpu);
127}
128
129static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
130{
131 smp_ops.send_call_func_ipi(mask);
132}
133
134void cpu_disable_common(void);
135void native_smp_prepare_boot_cpu(void);
136void native_smp_prepare_cpus(unsigned int max_cpus);
137void native_smp_cpus_done(unsigned int max_cpus);
138int native_cpu_up(unsigned int cpunum);
139int native_cpu_disable(void);
140void native_cpu_die(unsigned int cpu);
141void native_play_dead(void);
142void play_dead_common(void);
143void wbinvd_on_cpu(int cpu);
144int wbinvd_on_all_cpus(void);
145
146void native_send_call_func_ipi(const struct cpumask *mask);
147void native_send_call_func_single_ipi(int cpu);
148
149void smp_store_cpu_info(int id);
150#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
151
152/* We don't mark CPUs online until __cpu_up(), so we need another measure */
153static inline int num_booting_cpus(void)
154{
155 return cpumask_weight(cpu_callout_mask);
156}
157#else /* !CONFIG_SMP */
158#define wbinvd_on_cpu(cpu) wbinvd()
159static inline int wbinvd_on_all_cpus(void)
160{
161 wbinvd();
162 return 0;
163}
164#endif /* CONFIG_SMP */
165
166extern unsigned disabled_cpus __cpuinitdata;
167
168#ifdef CONFIG_X86_32_SMP
169/*
170 * This function is needed by all SMP systems. It must _always_ be valid
171 * from the initial startup. We map APIC_BASE very early in page_setup(),
172 * so this is correct in the x86 case.
173 */
174#define raw_smp_processor_id() (percpu_read(cpu_number))
175extern int safe_smp_processor_id(void);
176
177#elif defined(CONFIG_X86_64_SMP)
178#define raw_smp_processor_id() (percpu_read(cpu_number))
179
180#define stack_smp_processor_id() \
181({ \
182 struct thread_info *ti; \
183 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
184 ti->cpu; \
185})
186#define safe_smp_processor_id() smp_processor_id()
187
188#endif
189
190#ifdef CONFIG_X86_LOCAL_APIC
191
192#ifndef CONFIG_X86_64
193static inline int logical_smp_processor_id(void)
194{
195 /* we don't want to mark this access volatile - bad code generation */
196 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
197}
198
199#endif
200
201extern int hard_smp_processor_id(void);
202
203#else /* CONFIG_X86_LOCAL_APIC */
204
205# ifndef CONFIG_SMP
206# define hard_smp_processor_id() 0
207# endif
208
209#endif /* CONFIG_X86_LOCAL_APIC */
210
211#endif /* __ASSEMBLY__ */
212#endif /* _ASM_X86_SMP_H */