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>
19 #include <asm/thread_info.h>
21 extern cpumask_t cpu_callout_map;
22 extern cpumask_t cpu_initialized;
23 extern cpumask_t cpu_callin_map;
25 extern void (*mtrr_hook)(void);
26 extern void zap_low_mappings(void);
28 extern int __cpuinit get_local_pda(int cpu);
30 extern int smp_num_siblings;
31 extern unsigned int num_processors;
32 extern cpumask_t cpu_initialized;
34 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
35 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
36 DECLARE_PER_CPU(u16, cpu_llc_id);
38 DECLARE_PER_CPU(int, cpu_number);
41 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
42 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
44 /* Static state in head.S used to set up a CPU */
51 void (*smp_prepare_boot_cpu)(void);
52 void (*smp_prepare_cpus)(unsigned max_cpus);
53 void (*smp_cpus_done)(unsigned max_cpus);
55 void (*smp_send_stop)(void);
56 void (*smp_send_reschedule)(int cpu);
58 int (*cpu_up)(unsigned cpu);
59 int (*cpu_disable)(void);
60 void (*cpu_die)(unsigned int cpu);
61 void (*play_dead)(void);
63 void (*send_call_func_ipi)(const struct cpumask *mask);
64 void (*send_call_func_single_ipi)(int cpu);
67 /* Globals due to paravirt */
68 extern void set_cpu_sibling_map(int cpu);
71 #ifndef CONFIG_PARAVIRT
72 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
74 extern struct smp_ops smp_ops;
76 static inline void smp_send_stop(void)
78 smp_ops.smp_send_stop();
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(cpumask_t 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);
141 void native_send_call_func_ipi(const struct cpumask *mask);
142 void native_send_call_func_single_ipi(int cpu);
144 extern void prefill_possible_map(void);
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 cpus_weight(cpu_callout_map);
155 static inline void prefill_possible_map(void)
158 #endif /* CONFIG_SMP */
160 extern unsigned disabled_cpus __cpuinitdata;
162 #ifdef CONFIG_X86_32_SMP
164 * This function is needed by all SMP systems. It must _always_ be valid
165 * from the initial startup. We map APIC_BASE very early in page_setup(),
166 * so this is correct in the x86 case.
168 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
169 extern int safe_smp_processor_id(void);
171 #elif defined(CONFIG_X86_64_SMP)
172 #define raw_smp_processor_id() read_pda(cpunumber)
174 #define stack_smp_processor_id() \
176 struct thread_info *ti; \
177 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
180 #define safe_smp_processor_id() smp_processor_id()
182 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
183 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
184 #define safe_smp_processor_id() 0
185 #define stack_smp_processor_id() 0
188 #ifdef CONFIG_X86_LOCAL_APIC
190 #ifndef CONFIG_X86_64
191 static inline int logical_smp_processor_id(void)
193 /* we don't want to mark this access volatile - bad code generation */
194 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
197 #include <mach_apicdef.h>
198 static inline unsigned int read_apic_id(void)
202 reg = *(u32 *)(APIC_BASE + APIC_ID);
204 return GET_APIC_ID(reg);
209 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
210 extern int hard_smp_processor_id(void);
212 #include <mach_apicdef.h>
213 static inline int hard_smp_processor_id(void)
215 /* we don't want to mark this access volatile - bad code generation */
216 return read_apic_id();
218 # endif /* APIC_DEFINITION */
220 #else /* CONFIG_X86_LOCAL_APIC */
223 # define hard_smp_processor_id() 0
226 #endif /* CONFIG_X86_LOCAL_APIC */
228 #ifdef CONFIG_X86_HAS_BOOT_CPU_ID
229 extern unsigned char boot_cpu_id;
231 #define boot_cpu_id 0
234 #endif /* __ASSEMBLY__ */
235 #endif /* _ASM_X86_SMP_H */