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>
19 #include <asm/cpufeature.h>
21 extern int smp_num_siblings;
22 extern unsigned int num_processors;
24 static inline bool cpu_has_ht_siblings(void)
26 bool has_siblings = false;
28 has_siblings = cpu_has_ht && smp_num_siblings > 1;
33 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
34 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
35 /* cpus sharing the last level cache: */
36 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
37 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
38 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
40 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
42 return per_cpu(cpu_llc_shared_map, cpu);
45 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
46 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
47 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
48 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
51 /* Static state in head.S used to set up a CPU */
52 extern unsigned long stack_start; /* Initial stack pointer address */
57 void (*smp_prepare_boot_cpu)(void);
58 void (*smp_prepare_cpus)(unsigned max_cpus);
59 void (*smp_cpus_done)(unsigned max_cpus);
61 void (*stop_other_cpus)(int wait);
62 void (*smp_send_reschedule)(int cpu);
64 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
65 int (*cpu_disable)(void);
66 void (*cpu_die)(unsigned int cpu);
67 void (*play_dead)(void);
69 void (*send_call_func_ipi)(const struct cpumask *mask);
70 void (*send_call_func_single_ipi)(int cpu);
73 /* Globals due to paravirt */
74 extern void set_cpu_sibling_map(int cpu);
77 #ifndef CONFIG_PARAVIRT
78 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
80 extern struct smp_ops smp_ops;
82 static inline void smp_send_stop(void)
84 smp_ops.stop_other_cpus(0);
87 static inline void stop_other_cpus(void)
89 smp_ops.stop_other_cpus(1);
92 static inline void smp_prepare_boot_cpu(void)
94 smp_ops.smp_prepare_boot_cpu();
97 static inline void smp_prepare_cpus(unsigned int max_cpus)
99 smp_ops.smp_prepare_cpus(max_cpus);
102 static inline void smp_cpus_done(unsigned int max_cpus)
104 smp_ops.smp_cpus_done(max_cpus);
107 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
109 return smp_ops.cpu_up(cpu, tidle);
112 static inline int __cpu_disable(void)
114 return smp_ops.cpu_disable();
117 static inline void __cpu_die(unsigned int cpu)
119 smp_ops.cpu_die(cpu);
122 static inline void play_dead(void)
127 static inline void smp_send_reschedule(int cpu)
129 smp_ops.smp_send_reschedule(cpu);
132 static inline void arch_send_call_function_single_ipi(int cpu)
134 smp_ops.send_call_func_single_ipi(cpu);
137 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
139 smp_ops.send_call_func_ipi(mask);
142 void cpu_disable_common(void);
143 void native_smp_prepare_boot_cpu(void);
144 void native_smp_prepare_cpus(unsigned int max_cpus);
145 void native_smp_cpus_done(unsigned int max_cpus);
146 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
147 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
148 int native_cpu_disable(void);
149 int common_cpu_die(unsigned int cpu);
150 void native_cpu_die(unsigned int cpu);
151 void native_play_dead(void);
152 void play_dead_common(void);
153 void wbinvd_on_cpu(int cpu);
154 int wbinvd_on_all_cpus(void);
156 void native_send_call_func_ipi(const struct cpumask *mask);
157 void native_send_call_func_single_ipi(int cpu);
158 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
160 void smp_store_boot_cpu_info(void);
161 void smp_store_cpu_info(int id);
162 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
164 #else /* !CONFIG_SMP */
165 #define wbinvd_on_cpu(cpu) wbinvd()
166 static inline int wbinvd_on_all_cpus(void)
171 #endif /* CONFIG_SMP */
173 extern unsigned disabled_cpus;
175 #ifdef CONFIG_X86_32_SMP
177 * This function is needed by all SMP systems. It must _always_ be valid
178 * from the initial startup. We map APIC_BASE very early in page_setup(),
179 * so this is correct in the x86 case.
181 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
182 extern int safe_smp_processor_id(void);
184 #elif defined(CONFIG_X86_64_SMP)
185 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
187 #define stack_smp_processor_id() \
189 struct thread_info *ti; \
190 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
193 #define safe_smp_processor_id() smp_processor_id()
197 #ifdef CONFIG_X86_LOCAL_APIC
199 #ifndef CONFIG_X86_64
200 static inline int logical_smp_processor_id(void)
202 /* we don't want to mark this access volatile - bad code generation */
203 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
208 extern int hard_smp_processor_id(void);
210 #else /* CONFIG_X86_LOCAL_APIC */
213 # define hard_smp_processor_id() 0
216 #endif /* CONFIG_X86_LOCAL_APIC */
218 #ifdef CONFIG_DEBUG_NMI_SELFTEST
219 extern void nmi_selftest(void);
221 #define nmi_selftest() do { } while (0)
224 #endif /* __ASSEMBLY__ */
225 #endif /* _ASM_X86_SMP_H */