5 #include <linux/cpumask.h>
6 #include <linux/init.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 extern cpumask_t cpu_callout_map;
20 extern cpumask_t cpu_callin_map;
22 extern int smp_num_siblings;
23 extern unsigned int num_processors;
25 extern void smp_alloc_memory(void);
26 extern void lock_ipi_call_lock(void);
27 extern void unlock_ipi_call_lock(void);
29 extern void (*mtrr_hook) (void);
30 extern void zap_low_mappings (void);
32 extern u8 __initdata x86_cpu_to_apicid_init[];
33 extern void *x86_cpu_to_apicid_early_ptr;
35 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
36 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
37 DECLARE_PER_CPU(u8, cpu_llc_id);
38 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
40 #ifdef CONFIG_HOTPLUG_CPU
41 extern void cpu_exit_clear(void);
42 extern void cpu_uninit(void);
43 extern void remove_siblinginfo(int cpu);
46 /* Globals due to paravirt */
47 extern void set_cpu_sibling_map(int 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);
58 int (*smp_call_function_mask)(cpumask_t mask,
59 void (*func)(void *info), void *info,
64 extern struct smp_ops smp_ops;
66 static inline void smp_prepare_boot_cpu(void)
68 smp_ops.smp_prepare_boot_cpu();
70 static inline void smp_prepare_cpus(unsigned int max_cpus)
72 smp_ops.smp_prepare_cpus(max_cpus);
74 static inline int __cpu_up(unsigned int cpu)
76 return smp_ops.cpu_up(cpu);
78 static inline void smp_cpus_done(unsigned int max_cpus)
80 smp_ops.smp_cpus_done(max_cpus);
83 static inline void smp_send_stop(void)
85 smp_ops.smp_send_stop();
87 static inline void smp_send_reschedule(int cpu)
89 smp_ops.smp_send_reschedule(cpu);
91 static inline int smp_call_function_mask(cpumask_t mask,
92 void (*func) (void *info), void *info,
95 return smp_ops.smp_call_function_mask(mask, func, info, wait);
98 void native_smp_prepare_boot_cpu(void);
99 void native_smp_prepare_cpus(unsigned int max_cpus);
100 int native_cpu_up(unsigned int cpunum);
101 void native_smp_cpus_done(unsigned int max_cpus);
103 #ifndef CONFIG_PARAVIRT
104 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
107 extern int __cpu_disable(void);
108 extern void __cpu_die(unsigned int cpu);
111 * This function is needed by all SMP systems. It must _always_ be valid
112 * from the initial startup. We map APIC_BASE very early in page_setup(),
113 * so this is correct in the x86 case.
115 DECLARE_PER_CPU(int, cpu_number);
116 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
118 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
120 extern int safe_smp_processor_id(void);
122 void __cpuinit smp_store_cpu_info(int id);
124 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
125 static inline int num_booting_cpus(void)
127 return cpus_weight(cpu_callout_map);
130 #else /* CONFIG_SMP */
132 #define safe_smp_processor_id() 0
133 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
135 #endif /* !CONFIG_SMP */
137 #ifdef CONFIG_X86_LOCAL_APIC
139 static __inline int logical_smp_processor_id(void)
141 /* we don't want to mark this access volatile - bad code generation */
142 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
145 # ifdef APIC_DEFINITION
146 extern int hard_smp_processor_id(void);
148 # include <mach_apicdef.h>
149 static inline int hard_smp_processor_id(void)
151 /* we don't want to mark this access volatile - bad code generation */
152 return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
154 # endif /* APIC_DEFINITION */
156 #else /* CONFIG_X86_LOCAL_APIC */
159 # define hard_smp_processor_id() 0
162 #endif /* CONFIG_X86_LOCAL_APIC */
164 #endif /* !ASSEMBLY */