Line data Source code
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 1 : 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 (*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 */
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.stop_other_cpus(0);
77 : }
78 :
79 : static inline void stop_other_cpus(void)
80 : {
81 : smp_ops.stop_other_cpus(1);
82 : }
83 :
84 : static inline void smp_prepare_boot_cpu(void)
85 : {
86 : smp_ops.smp_prepare_boot_cpu();
87 : }
88 :
89 : static inline void smp_prepare_cpus(unsigned int max_cpus)
90 : {
91 : smp_ops.smp_prepare_cpus(max_cpus);
92 : }
93 :
94 : static inline void smp_cpus_done(unsigned int max_cpus)
95 : {
96 : smp_ops.smp_cpus_done(max_cpus);
97 : }
98 :
99 : static inline int __cpu_up(unsigned int cpu)
100 : {
101 : return smp_ops.cpu_up(cpu);
102 : }
103 :
104 : static inline int __cpu_disable(void)
105 : {
106 : return smp_ops.cpu_disable();
107 : }
108 :
109 : static inline void __cpu_die(unsigned int cpu)
110 : {
111 : smp_ops.cpu_die(cpu);
112 : }
113 :
114 : static inline void play_dead(void)
115 : {
116 : smp_ops.play_dead();
117 : }
118 :
119 : static inline void smp_send_reschedule(int cpu)
120 : {
121 : smp_ops.smp_send_reschedule(cpu);
122 : }
123 :
124 : static inline void arch_send_call_function_single_ipi(int cpu)
125 : {
126 : smp_ops.send_call_func_single_ipi(cpu);
127 : }
128 :
129 : static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
130 : {
131 : smp_ops.send_call_func_ipi(mask);
132 : }
133 :
134 : void cpu_disable_common(void);
135 : void native_smp_prepare_boot_cpu(void);
136 : void native_smp_prepare_cpus(unsigned int max_cpus);
137 : void native_smp_cpus_done(unsigned int max_cpus);
138 : int native_cpu_up(unsigned int cpunum);
139 : int native_cpu_disable(void);
140 : void native_cpu_die(unsigned int cpu);
141 : void native_play_dead(void);
142 : void play_dead_common(void);
143 : void wbinvd_on_cpu(int cpu);
144 : int wbinvd_on_all_cpus(void);
145 :
146 : void native_send_call_func_ipi(const struct cpumask *mask);
147 : void native_send_call_func_single_ipi(int cpu);
148 :
149 : void 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 */
153 : static 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()
159 : static inline int wbinvd_on_all_cpus(void)
160 : {
161 : wbinvd();
162 : return 0;
163 : }
164 : #endif /* CONFIG_SMP */
165 :
166 : extern 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))
175 : extern 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
193 : static 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 :
201 : extern 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 */
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