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>
20 #include <asm/cpufeature.h>
22 extern int smp_num_siblings;
23 extern unsigned int num_processors;
25 static inline bool cpu_has_ht_siblings(void)
27 bool has_siblings = false;
29 has_siblings = cpu_has_ht && smp_num_siblings > 1;
34 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
35 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
36 /* cpus sharing the last level cache: */
37 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
38 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
39 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
41 static inline struct cpumask *cpu_sibling_mask(int cpu)
43 return per_cpu(cpu_sibling_map, cpu);
46 static inline struct cpumask *cpu_core_mask(int cpu)
48 return per_cpu(cpu_core_map, cpu);
51 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
53 return per_cpu(cpu_llc_shared_map, cpu);
56 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
57 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
58 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
59 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
62 /* Static state in head.S used to set up a CPU */
63 extern unsigned long stack_start; /* Initial stack pointer address */
68 void (*smp_prepare_boot_cpu)(void);
69 void (*smp_prepare_cpus)(unsigned max_cpus);
70 void (*smp_cpus_done)(unsigned max_cpus);
72 void (*stop_other_cpus)(int wait);
73 void (*smp_send_reschedule)(int cpu);
75 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
76 int (*cpu_disable)(void);
77 void (*cpu_die)(unsigned int cpu);
78 void (*play_dead)(void);
80 void (*send_call_func_ipi)(const struct cpumask *mask);
81 void (*send_call_func_single_ipi)(int cpu);
84 /* Globals due to paravirt */
85 extern void set_cpu_sibling_map(int cpu);
88 #ifndef CONFIG_PARAVIRT
89 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
91 extern struct smp_ops smp_ops;
93 static inline void smp_send_stop(void)
95 smp_ops.stop_other_cpus(0);
98 static inline void stop_other_cpus(void)
100 smp_ops.stop_other_cpus(1);
103 static inline void smp_prepare_boot_cpu(void)
105 smp_ops.smp_prepare_boot_cpu();
108 static inline void smp_prepare_cpus(unsigned int max_cpus)
110 smp_ops.smp_prepare_cpus(max_cpus);
113 static inline void smp_cpus_done(unsigned int max_cpus)
115 smp_ops.smp_cpus_done(max_cpus);
118 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
120 return smp_ops.cpu_up(cpu, tidle);
123 static inline int __cpu_disable(void)
125 return smp_ops.cpu_disable();
128 static inline void __cpu_die(unsigned int cpu)
130 smp_ops.cpu_die(cpu);
133 static inline void play_dead(void)
138 static inline void smp_send_reschedule(int cpu)
140 smp_ops.smp_send_reschedule(cpu);
143 static inline void arch_send_call_function_single_ipi(int cpu)
145 smp_ops.send_call_func_single_ipi(cpu);
148 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
150 smp_ops.send_call_func_ipi(mask);
153 void cpu_disable_common(void);
154 void native_smp_prepare_boot_cpu(void);
155 void native_smp_prepare_cpus(unsigned int max_cpus);
156 void native_smp_cpus_done(unsigned int max_cpus);
157 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
158 int native_cpu_disable(void);
159 void native_cpu_die(unsigned int cpu);
160 void native_play_dead(void);
161 void play_dead_common(void);
162 void wbinvd_on_cpu(int cpu);
163 int wbinvd_on_all_cpus(void);
165 void native_send_call_func_ipi(const struct cpumask *mask);
166 void native_send_call_func_single_ipi(int cpu);
167 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
169 void smp_store_boot_cpu_info(void);
170 void smp_store_cpu_info(int id);
171 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
173 #else /* !CONFIG_SMP */
174 #define wbinvd_on_cpu(cpu) wbinvd()
175 static inline int wbinvd_on_all_cpus(void)
180 #endif /* CONFIG_SMP */
182 extern unsigned disabled_cpus;
184 #ifdef CONFIG_X86_32_SMP
186 * This function is needed by all SMP systems. It must _always_ be valid
187 * from the initial startup. We map APIC_BASE very early in page_setup(),
188 * so this is correct in the x86 case.
190 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
191 extern int safe_smp_processor_id(void);
193 #elif defined(CONFIG_X86_64_SMP)
194 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
196 #define stack_smp_processor_id() \
198 struct thread_info *ti; \
199 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
202 #define safe_smp_processor_id() smp_processor_id()
206 #ifdef CONFIG_X86_LOCAL_APIC
208 #ifndef CONFIG_X86_64
209 static inline int logical_smp_processor_id(void)
211 /* we don't want to mark this access volatile - bad code generation */
212 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
217 extern int hard_smp_processor_id(void);
219 #else /* CONFIG_X86_LOCAL_APIC */
222 # define hard_smp_processor_id() 0
225 #endif /* CONFIG_X86_LOCAL_APIC */
227 #ifdef CONFIG_DEBUG_NMI_SELFTEST
228 extern void nmi_selftest(void);
230 #define nmi_selftest() do { } while (0)
233 #endif /* __ASSEMBLY__ */
234 #endif /* _ASM_X86_SMP_H */