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 int (*cpu_up)(unsigned cpu);
54 void (*smp_cpus_done)(unsigned max_cpus);
56 void (*smp_send_stop)(void);
57 void (*smp_send_reschedule)(int cpu);
59 void (*send_call_func_ipi)(cpumask_t 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.smp_send_stop();
77 static inline void smp_prepare_boot_cpu(void)
79 smp_ops.smp_prepare_boot_cpu();
82 static inline void smp_prepare_cpus(unsigned int max_cpus)
84 smp_ops.smp_prepare_cpus(max_cpus);
87 static inline void smp_cpus_done(unsigned int max_cpus)
89 smp_ops.smp_cpus_done(max_cpus);
92 static inline int __cpu_up(unsigned int cpu)
94 return smp_ops.cpu_up(cpu);
97 static inline void smp_send_reschedule(int cpu)
99 smp_ops.smp_send_reschedule(cpu);
102 static inline void arch_send_call_function_single_ipi(int cpu)
104 smp_ops.send_call_func_single_ipi(cpu);
107 static inline void arch_send_call_function_ipi(cpumask_t mask)
109 smp_ops.send_call_func_ipi(mask);
112 void native_smp_prepare_boot_cpu(void);
113 void native_smp_prepare_cpus(unsigned int max_cpus);
114 void native_smp_cpus_done(unsigned int max_cpus);
115 int native_cpu_up(unsigned int cpunum);
116 void native_send_call_func_ipi(cpumask_t mask);
117 void native_send_call_func_single_ipi(int cpu);
119 extern int __cpu_disable(void);
120 extern void __cpu_die(unsigned int cpu);
122 void smp_store_cpu_info(int id);
123 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
125 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
126 static inline int num_booting_cpus(void)
128 return cpus_weight(cpu_callout_map);
130 #endif /* CONFIG_SMP */
132 #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
133 extern void prefill_possible_map(void);
135 static inline void prefill_possible_map(void)
140 extern unsigned disabled_cpus __cpuinitdata;
142 #ifdef CONFIG_X86_32_SMP
144 * This function is needed by all SMP systems. It must _always_ be valid
145 * from the initial startup. We map APIC_BASE very early in page_setup(),
146 * so this is correct in the x86 case.
148 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
149 extern int safe_smp_processor_id(void);
151 #elif defined(CONFIG_X86_64_SMP)
152 #define raw_smp_processor_id() read_pda(cpunumber)
154 #define stack_smp_processor_id() \
156 struct thread_info *ti; \
157 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
160 #define safe_smp_processor_id() smp_processor_id()
162 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
163 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
164 #define safe_smp_processor_id() 0
165 #define stack_smp_processor_id() 0
168 #ifdef CONFIG_X86_LOCAL_APIC
170 #ifndef CONFIG_X86_64
171 static inline int logical_smp_processor_id(void)
173 /* we don't want to mark this access volatile - bad code generation */
174 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
177 #include <mach_apicdef.h>
178 static inline unsigned int read_apic_id(void)
182 reg = *(u32 *)(APIC_BASE + APIC_ID);
184 return GET_APIC_ID(reg);
189 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
190 extern int hard_smp_processor_id(void);
192 #include <mach_apicdef.h>
193 static inline int hard_smp_processor_id(void)
195 /* we don't want to mark this access volatile - bad code generation */
196 return read_apic_id();
198 # endif /* APIC_DEFINITION */
200 #else /* CONFIG_X86_LOCAL_APIC */
203 # define hard_smp_processor_id() 0
206 #endif /* CONFIG_X86_LOCAL_APIC */
208 #ifdef CONFIG_HOTPLUG_CPU
209 extern void cpu_uninit(void);
212 #endif /* __ASSEMBLY__ */
213 #endif /* ASM_X86__SMP_H */