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>
18 #include <asm/thread_info.h>
19 #include <asm/cpumask.h>
21 extern int smp_num_siblings;
22 extern unsigned int num_processors;
24 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
25 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
26 DECLARE_PER_CPU(u16, cpu_llc_id);
27 DECLARE_PER_CPU(int, cpu_number);
29 static inline struct cpumask *cpu_sibling_mask(int cpu)
31 return &per_cpu(cpu_sibling_map, cpu);
34 static inline struct cpumask *cpu_core_mask(int cpu)
36 return &per_cpu(cpu_core_map, cpu);
39 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
40 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
42 /* Static state in head.S used to set up a CPU */
49 void (*smp_prepare_boot_cpu)(void);
50 void (*smp_prepare_cpus)(unsigned max_cpus);
51 void (*smp_cpus_done)(unsigned max_cpus);
53 void (*smp_send_stop)(void);
54 void (*smp_send_reschedule)(int cpu);
56 int (*cpu_up)(unsigned cpu);
57 int (*cpu_disable)(void);
58 void (*cpu_die)(unsigned int cpu);
59 void (*play_dead)(void);
61 void (*send_call_func_ipi)(const struct cpumask *mask);
62 void (*send_call_func_single_ipi)(int cpu);
65 /* Globals due to paravirt */
66 extern void set_cpu_sibling_map(int cpu);
69 #ifndef CONFIG_PARAVIRT
70 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
72 extern struct smp_ops smp_ops;
74 static inline void smp_send_stop(void)
76 smp_ops.smp_send_stop();
79 static inline void smp_prepare_boot_cpu(void)
81 smp_ops.smp_prepare_boot_cpu();
84 static inline void smp_prepare_cpus(unsigned int max_cpus)
86 smp_ops.smp_prepare_cpus(max_cpus);
89 static inline void smp_cpus_done(unsigned int max_cpus)
91 smp_ops.smp_cpus_done(max_cpus);
94 static inline int __cpu_up(unsigned int cpu)
96 return smp_ops.cpu_up(cpu);
99 static inline int __cpu_disable(void)
101 return smp_ops.cpu_disable();
104 static inline void __cpu_die(unsigned int cpu)
106 smp_ops.cpu_die(cpu);
109 static inline void play_dead(void)
114 static inline void smp_send_reschedule(int cpu)
116 smp_ops.smp_send_reschedule(cpu);
119 static inline void arch_send_call_function_single_ipi(int cpu)
121 smp_ops.send_call_func_single_ipi(cpu);
124 static inline void arch_send_call_function_ipi(cpumask_t mask)
126 smp_ops.send_call_func_ipi(&mask);
129 void cpu_disable_common(void);
130 void native_smp_prepare_boot_cpu(void);
131 void native_smp_prepare_cpus(unsigned int max_cpus);
132 void native_smp_cpus_done(unsigned int max_cpus);
133 int native_cpu_up(unsigned int cpunum);
134 int native_cpu_disable(void);
135 void native_cpu_die(unsigned int cpu);
136 void native_play_dead(void);
137 void play_dead_common(void);
139 void native_send_call_func_ipi(const struct cpumask *mask);
140 void native_send_call_func_single_ipi(int cpu);
142 void smp_store_cpu_info(int id);
143 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
145 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
146 static inline int num_booting_cpus(void)
148 return cpumask_weight(cpu_callout_mask);
150 #endif /* CONFIG_SMP */
152 extern unsigned disabled_cpus __cpuinitdata;
154 #ifdef CONFIG_X86_32_SMP
156 * This function is needed by all SMP systems. It must _always_ be valid
157 * from the initial startup. We map APIC_BASE very early in page_setup(),
158 * so this is correct in the x86 case.
160 #define raw_smp_processor_id() (percpu_read(cpu_number))
161 extern int safe_smp_processor_id(void);
163 #elif defined(CONFIG_X86_64_SMP)
164 #define raw_smp_processor_id() (percpu_read(cpu_number))
166 #define stack_smp_processor_id() \
168 struct thread_info *ti; \
169 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
172 #define safe_smp_processor_id() smp_processor_id()
176 #ifdef CONFIG_X86_LOCAL_APIC
178 #ifndef CONFIG_X86_64
179 static inline int logical_smp_processor_id(void)
181 /* we don't want to mark this access volatile - bad code generation */
182 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
185 #include <mach_apicdef.h>
186 static inline unsigned int read_apic_id(void)
190 reg = *(u32 *)(APIC_BASE + APIC_ID);
192 return GET_APIC_ID(reg);
197 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
198 extern int hard_smp_processor_id(void);
200 #include <mach_apicdef.h>
201 static inline int hard_smp_processor_id(void)
203 /* we don't want to mark this access volatile - bad code generation */
204 return read_apic_id();
206 # endif /* APIC_DEFINITION */
208 #else /* CONFIG_X86_LOCAL_APIC */
211 # define hard_smp_processor_id() 0
214 #endif /* CONFIG_X86_LOCAL_APIC */
216 #endif /* __ASSEMBLY__ */
217 #endif /* _ASM_X86_SMP_H */