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 #ifndef CONFIG_PARAVIRT
68 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
70 extern struct smp_ops smp_ops;
72 static inline void smp_send_stop(void)
74 smp_ops.stop_other_cpus(0);
77 static inline void stop_other_cpus(void)
79 smp_ops.stop_other_cpus(1);
82 static inline void smp_prepare_boot_cpu(void)
84 smp_ops.smp_prepare_boot_cpu();
87 static inline void smp_prepare_cpus(unsigned int max_cpus)
89 smp_ops.smp_prepare_cpus(max_cpus);
92 static inline void smp_cpus_done(unsigned int max_cpus)
94 smp_ops.smp_cpus_done(max_cpus);
97 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
99 return smp_ops.cpu_up(cpu, tidle);
102 static inline int __cpu_disable(void)
104 return smp_ops.cpu_disable();
107 static inline void __cpu_die(unsigned int cpu)
109 smp_ops.cpu_die(cpu);
112 static inline void play_dead(void)
117 static inline void smp_send_reschedule(int cpu)
119 smp_ops.smp_send_reschedule(cpu);
122 static inline void arch_send_call_function_single_ipi(int cpu)
124 smp_ops.send_call_func_single_ipi(cpu);
127 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
129 smp_ops.send_call_func_ipi(mask);
132 void cpu_disable_common(void);
133 void native_smp_prepare_boot_cpu(void);
134 void native_smp_prepare_cpus(unsigned int max_cpus);
135 void native_smp_cpus_done(unsigned int max_cpus);
136 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
137 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
138 int native_cpu_disable(void);
139 int common_cpu_die(unsigned int cpu);
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);
146 void native_send_call_func_ipi(const struct cpumask *mask);
147 void native_send_call_func_single_ipi(int cpu);
148 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
150 void smp_store_boot_cpu_info(void);
151 void smp_store_cpu_info(int id);
152 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
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;
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() (this_cpu_read(cpu_number))
172 extern int safe_smp_processor_id(void);
174 #elif defined(CONFIG_X86_64_SMP)
175 #define raw_smp_processor_id() (this_cpu_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 #ifdef CONFIG_DEBUG_NMI_SELFTEST
209 extern void nmi_selftest(void);
211 #define nmi_selftest() do { } while (0)
214 #endif /* __ASSEMBLY__ */
215 #endif /* _ASM_X86_SMP_H */