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
21 extern int smp_num_siblings;
22 extern unsigned int num_processors;
23
24 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
25 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
26 DECLARE_PER_CPU(u16, cpu_llc_id);
27 DECLARE_PER_CPU(int, cpu_number);
28
29 static inline struct cpumask *cpu_sibling_mask(int cpu)
30 {
31 return per_cpu(cpu_sibling_map, cpu);
32 }
33
34 static inline struct cpumask *cpu_core_mask(int cpu)
35 {
36 return per_cpu(cpu_core_map, cpu);
37 }
38
39 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
40 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
41
42 /* Static state in head.S used to set up a CPU */
43 extern struct {
44 void *sp;
45 unsigned short ss;
46 } stack_start;
47
48 struct 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 (*smp_send_stop)(void);
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 */
66 extern 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
72 extern struct smp_ops smp_ops;
73
74 static inline void smp_send_stop(void)
75 {
76 smp_ops.smp_send_stop();
77 }
78
79 static inline void smp_prepare_boot_cpu(void)
80 {
81 smp_ops.smp_prepare_boot_cpu();
82 }
83
84 static inline void smp_prepare_cpus(unsigned int max_cpus)
85 {
86 smp_ops.smp_prepare_cpus(max_cpus);
87 }
88
89 static inline void smp_cpus_done(unsigned int max_cpus)
90 {
91 smp_ops.smp_cpus_done(max_cpus);
92 }
93
94 static inline int __cpu_up(unsigned int cpu)
95 {
96 return smp_ops.cpu_up(cpu);
97 }
98
99 static inline int __cpu_disable(void)
100 {
101 return smp_ops.cpu_disable();
102 }
103
104 static inline void __cpu_die(unsigned int cpu)
105 {
106 smp_ops.cpu_die(cpu);
107 }
108
109 static inline void play_dead(void)
110 {
111 smp_ops.play_dead();
112 }
113
114 static inline void smp_send_reschedule(int cpu)
115 {
116 smp_ops.smp_send_reschedule(cpu);
117 }
118
119 static inline void arch_send_call_function_single_ipi(int cpu)
120 {
121 smp_ops.send_call_func_single_ipi(cpu);
122 }
123
124 #define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask
125 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
126 {
127 smp_ops.send_call_func_ipi(mask);
128 }
129
130 void cpu_disable_common(void);
131 void native_smp_prepare_boot_cpu(void);
132 void native_smp_prepare_cpus(unsigned int max_cpus);
133 void native_smp_cpus_done(unsigned int max_cpus);
134 int native_cpu_up(unsigned int cpunum);
135 int native_cpu_disable(void);
136 void native_cpu_die(unsigned int cpu);
137 void native_play_dead(void);
138 void play_dead_common(void);
139
140 void native_send_call_func_ipi(const struct cpumask *mask);
141 void native_send_call_func_single_ipi(int cpu);
142
143 void smp_store_cpu_info(int id);
144 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
145
146 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
147 static inline int num_booting_cpus(void)
148 {
149 return cpumask_weight(cpu_callout_mask);
150 }
151 #endif /* CONFIG_SMP */
152
153 extern unsigned disabled_cpus __cpuinitdata;
154
155 #ifdef CONFIG_X86_32_SMP
156 /*
157 * This function is needed by all SMP systems. It must _always_ be valid
158 * from the initial startup. We map APIC_BASE very early in page_setup(),
159 * so this is correct in the x86 case.
160 */
161 #define raw_smp_processor_id() (percpu_read(cpu_number))
162 extern int safe_smp_processor_id(void);
163
164 #elif defined(CONFIG_X86_64_SMP)
165 #define raw_smp_processor_id() (percpu_read(cpu_number))
166
167 #define stack_smp_processor_id() \
168 ({ \
169 struct thread_info *ti; \
170 __asm__("andq %%rsp,%0; ":"=r" (ti) : "" (CURRENT_MASK)); \
171 ti->cpu; \
172 })
173 #define safe_smp_processor_id() smp_processor_id()
174
175 #endif
176
177 #ifdef CONFIG_X86_LOCAL_APIC
178
179 #ifndef CONFIG_X86_64
180 static inline int logical_smp_processor_id(void)
181 {
182 /* we don't want to mark this access volatile - bad code generation */
183 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
184 }
185
186 #endif
187
188 extern int hard_smp_processor_id(void);
189
190 #else /* CONFIG_X86_LOCAL_APIC */
191
192 # ifndef CONFIG_SMP
193 # define hard_smp_processor_id() 0
194 # endif
195
196 #endif /* CONFIG_X86_LOCAL_APIC */
197
198 #endif /* __ASSEMBLY__ */
199 #endif /* _ASM_X86_SMP_H */
200
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