4 #include <linux/cpumask.h>
5 #include <asm/percpu.h>
8 * We need the APIC definitions automatically as part of 'smp.h'
10 #ifdef CONFIG_X86_LOCAL_APIC
11 # include <asm/mpspec.h>
12 # include <asm/apic.h>
13 # ifdef CONFIG_X86_IO_APIC
14 # include <asm/io_apic.h>
17 #include <asm/thread_info.h>
18 #include <asm/cpumask.h>
20 extern int smp_num_siblings
;
21 extern unsigned int num_processors
;
23 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t
, cpu_sibling_map
);
24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t
, cpu_core_map
);
25 /* cpus sharing the last level cache: */
26 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t
, cpu_llc_shared_map
);
27 DECLARE_PER_CPU_READ_MOSTLY(u16
, cpu_llc_id
);
28 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number
);
30 static inline struct cpumask
*cpu_llc_shared_mask(int cpu
)
32 return per_cpu(cpu_llc_shared_map
, cpu
);
35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16
, x86_cpu_to_apicid
);
36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16
, x86_bios_cpu_apicid
);
37 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid
);
41 /* Static state in head.S used to set up a CPU */
42 extern unsigned long stack_start
; /* Initial stack pointer address */
47 void (*smp_prepare_boot_cpu
)(void);
48 void (*smp_prepare_cpus
)(unsigned max_cpus
);
49 void (*smp_cpus_done
)(unsigned max_cpus
);
51 void (*stop_other_cpus
)(int wait
);
52 void (*smp_send_reschedule
)(int cpu
);
54 int (*cpu_up
)(unsigned cpu
, struct task_struct
*tidle
);
55 int (*cpu_disable
)(void);
56 void (*cpu_die
)(unsigned int cpu
);
57 void (*play_dead
)(void);
59 void (*send_call_func_ipi
)(const struct cpumask
*mask
);
60 void (*send_call_func_single_ipi
)(int cpu
);
63 /* Globals due to paravirt */
64 extern void set_cpu_sibling_map(int cpu
);
67 extern struct smp_ops smp_ops
;
69 static inline void smp_send_stop(void)
71 smp_ops
.stop_other_cpus(0);
74 static inline void stop_other_cpus(void)
76 smp_ops
.stop_other_cpus(1);
79 static inline void smp_prepare_boot_cpu(void)
81 smp_ops
.smp_prepare_boot_cpu();
84 static inline void smp_prepare_cpus(unsigned int max_cpus
)
86 smp_ops
.smp_prepare_cpus(max_cpus
);
89 static inline void smp_cpus_done(unsigned int max_cpus
)
91 smp_ops
.smp_cpus_done(max_cpus
);
94 static inline int __cpu_up(unsigned int cpu
, struct task_struct
*tidle
)
96 return smp_ops
.cpu_up(cpu
, tidle
);
99 static inline int __cpu_disable(void)
101 return smp_ops
.cpu_disable();
104 static inline void __cpu_die(unsigned int cpu
)
106 smp_ops
.cpu_die(cpu
);
109 static inline void play_dead(void)
114 static inline void smp_send_reschedule(int cpu
)
116 smp_ops
.smp_send_reschedule(cpu
);
119 static inline void arch_send_call_function_single_ipi(int cpu
)
121 smp_ops
.send_call_func_single_ipi(cpu
);
124 static inline void arch_send_call_function_ipi_mask(const struct cpumask
*mask
)
126 smp_ops
.send_call_func_ipi(mask
);
129 void cpu_disable_common(void);
130 void native_smp_prepare_boot_cpu(void);
131 void native_smp_prepare_cpus(unsigned int max_cpus
);
132 void native_smp_cpus_done(unsigned int max_cpus
);
133 void common_cpu_up(unsigned int cpunum
, struct task_struct
*tidle
);
134 int native_cpu_up(unsigned int cpunum
, struct task_struct
*tidle
);
135 int native_cpu_disable(void);
136 int common_cpu_die(unsigned int cpu
);
137 void native_cpu_die(unsigned int cpu
);
138 void hlt_play_dead(void);
139 void native_play_dead(void);
140 void play_dead_common(void);
141 void wbinvd_on_cpu(int cpu
);
142 int wbinvd_on_all_cpus(void);
144 void native_send_call_func_ipi(const struct cpumask
*mask
);
145 void native_send_call_func_single_ipi(int cpu
);
146 void x86_idle_thread_init(unsigned int cpu
, struct task_struct
*idle
);
148 void smp_store_boot_cpu_info(void);
149 void smp_store_cpu_info(int id
);
150 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
152 #else /* !CONFIG_SMP */
153 #define wbinvd_on_cpu(cpu) wbinvd()
154 static inline int wbinvd_on_all_cpus(void)
159 #define smp_num_siblings 1
160 #endif /* CONFIG_SMP */
162 extern unsigned disabled_cpus
;
164 #ifdef CONFIG_X86_32_SMP
166 * This function is needed by all SMP systems. It must _always_ be valid
167 * from the initial startup. We map APIC_BASE very early in page_setup(),
168 * so this is correct in the x86 case.
170 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
171 extern int safe_smp_processor_id(void);
173 #elif defined(CONFIG_X86_64_SMP)
174 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
176 #define safe_smp_processor_id() smp_processor_id()
180 #ifdef CONFIG_X86_LOCAL_APIC
182 #ifndef CONFIG_X86_64
183 static inline int logical_smp_processor_id(void)
185 /* we don't want to mark this access volatile - bad code generation */
186 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR
));
191 extern int hard_smp_processor_id(void);
193 #else /* CONFIG_X86_LOCAL_APIC */
196 # define hard_smp_processor_id() 0
199 #endif /* CONFIG_X86_LOCAL_APIC */
201 #ifdef CONFIG_DEBUG_NMI_SELFTEST
202 extern void nmi_selftest(void);
204 #define nmi_selftest() do { } while (0)
207 #endif /* __ASSEMBLY__ */
208 #endif /* _ASM_X86_SMP_H */