4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6 #include <asm/percpu.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
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>
18 #include <asm/thread_info.h>
19 #include <asm/cpumask.h>
21 extern int smp_num_siblings
;
22 extern unsigned int num_processors
;
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
);
29 static inline struct cpumask
*cpu_sibling_mask(int cpu
)
31 return per_cpu(cpu_sibling_map
, cpu
);
34 static inline struct cpumask
*cpu_core_mask(int cpu
)
36 return per_cpu(cpu_core_map
, cpu
);
39 DECLARE_EARLY_PER_CPU(u16
, x86_cpu_to_apicid
);
40 DECLARE_EARLY_PER_CPU(u16
, x86_bios_cpu_apicid
);
42 /* Static state in head.S used to set up a CPU */
43 extern unsigned long stack_start
; /* Initial stack pointer address */
46 void (*smp_prepare_boot_cpu
)(void);
47 void (*smp_prepare_cpus
)(unsigned max_cpus
);
48 void (*smp_cpus_done
)(unsigned max_cpus
);
50 void (*stop_other_cpus
)(int wait
);
51 void (*smp_send_reschedule
)(int cpu
);
53 int (*cpu_up
)(unsigned cpu
);
54 int (*cpu_disable
)(void);
55 void (*cpu_die
)(unsigned int cpu
);
56 void (*play_dead
)(void);
58 void (*send_call_func_ipi
)(const struct cpumask
*mask
);
59 void (*send_call_func_single_ipi
)(int cpu
);
62 /* Globals due to paravirt */
63 extern void set_cpu_sibling_map(int cpu
);
66 #ifndef CONFIG_PARAVIRT
67 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
69 extern struct smp_ops smp_ops
;
71 static inline void smp_send_stop(void)
73 smp_ops
.stop_other_cpus(0);
76 static inline void stop_other_cpus(void)
78 smp_ops
.stop_other_cpus(1);
81 static inline void smp_prepare_boot_cpu(void)
83 smp_ops
.smp_prepare_boot_cpu();
86 static inline void smp_prepare_cpus(unsigned int max_cpus
)
88 smp_ops
.smp_prepare_cpus(max_cpus
);
91 static inline void smp_cpus_done(unsigned int max_cpus
)
93 smp_ops
.smp_cpus_done(max_cpus
);
96 static inline int __cpu_up(unsigned int cpu
)
98 return smp_ops
.cpu_up(cpu
);
101 static inline int __cpu_disable(void)
103 return smp_ops
.cpu_disable();
106 static inline void __cpu_die(unsigned int cpu
)
108 smp_ops
.cpu_die(cpu
);
111 static inline void play_dead(void)
116 static inline void smp_send_reschedule(int cpu
)
118 smp_ops
.smp_send_reschedule(cpu
);
121 static inline void arch_send_call_function_single_ipi(int cpu
)
123 smp_ops
.send_call_func_single_ipi(cpu
);
126 static inline void arch_send_call_function_ipi_mask(const struct cpumask
*mask
)
128 smp_ops
.send_call_func_ipi(mask
);
131 void cpu_disable_common(void);
132 void native_smp_prepare_boot_cpu(void);
133 void native_smp_prepare_cpus(unsigned int max_cpus
);
134 void native_smp_cpus_done(unsigned int max_cpus
);
135 int native_cpu_up(unsigned int cpunum
);
136 int native_cpu_disable(void);
137 void native_cpu_die(unsigned int cpu
);
138 void native_play_dead(void);
139 void play_dead_common(void);
140 void wbinvd_on_cpu(int cpu
);
141 int wbinvd_on_all_cpus(void);
143 void native_send_call_func_ipi(const struct cpumask
*mask
);
144 void native_send_call_func_single_ipi(int cpu
);
146 void smp_store_cpu_info(int id
);
147 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
149 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
150 static inline int num_booting_cpus(void)
152 return cpumask_weight(cpu_callout_mask
);
154 #else /* !CONFIG_SMP */
155 #define wbinvd_on_cpu(cpu) wbinvd()
156 static inline int wbinvd_on_all_cpus(void)
161 #endif /* CONFIG_SMP */
163 extern unsigned disabled_cpus __cpuinitdata
;
165 #ifdef CONFIG_X86_32_SMP
167 * This function is needed by all SMP systems. It must _always_ be valid
168 * from the initial startup. We map APIC_BASE very early in page_setup(),
169 * so this is correct in the x86 case.
171 #define raw_smp_processor_id() (percpu_read(cpu_number))
172 extern int safe_smp_processor_id(void);
174 #elif defined(CONFIG_X86_64_SMP)
175 #define raw_smp_processor_id() (percpu_read(cpu_number))
177 #define stack_smp_processor_id() \
179 struct thread_info *ti; \
180 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
183 #define safe_smp_processor_id() smp_processor_id()
187 #ifdef CONFIG_X86_LOCAL_APIC
189 #ifndef CONFIG_X86_64
190 static inline int logical_smp_processor_id(void)
192 /* we don't want to mark this access volatile - bad code generation */
193 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR
));
198 extern int hard_smp_processor_id(void);
200 #else /* CONFIG_X86_LOCAL_APIC */
203 # define hard_smp_processor_id() 0
206 #endif /* CONFIG_X86_LOCAL_APIC */
208 #endif /* __ASSEMBLY__ */
209 #endif /* _ASM_X86_SMP_H */