1 #ifndef _ASM_X86_SMP_H_
2 #define _ASM_X86_SMP_H_
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 smp_num_siblings;
29 extern unsigned int num_processors;
30 extern cpumask_t cpu_initialized;
32 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
33 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
34 DECLARE_PER_CPU(u16, cpu_llc_id);
36 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
37 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
39 /* Static state in head.S used to set up a CPU */
46 void (*smp_prepare_boot_cpu)(void);
47 void (*smp_prepare_cpus)(unsigned max_cpus);
48 int (*cpu_up)(unsigned cpu);
49 void (*smp_cpus_done)(unsigned max_cpus);
51 void (*smp_send_stop)(void);
52 void (*smp_send_reschedule)(int cpu);
53 int (*smp_call_function_mask)(cpumask_t mask,
54 void (*func)(void *info), void *info,
58 /* Globals due to paravirt */
59 extern void set_cpu_sibling_map(int cpu);
62 #ifndef CONFIG_PARAVIRT
63 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
65 extern struct smp_ops smp_ops;
67 static inline void smp_send_stop(void)
69 smp_ops.smp_send_stop();
72 static inline void smp_prepare_boot_cpu(void)
74 smp_ops.smp_prepare_boot_cpu();
77 static inline void smp_prepare_cpus(unsigned int max_cpus)
79 smp_ops.smp_prepare_cpus(max_cpus);
82 static inline void smp_cpus_done(unsigned int max_cpus)
84 smp_ops.smp_cpus_done(max_cpus);
87 static inline int __cpu_up(unsigned int cpu)
89 return smp_ops.cpu_up(cpu);
92 static inline void smp_send_reschedule(int cpu)
94 smp_ops.smp_send_reschedule(cpu);
97 static inline int smp_call_function_mask(cpumask_t mask,
98 void (*func) (void *info), void *info,
101 return smp_ops.smp_call_function_mask(mask, func, info, wait);
104 void native_smp_prepare_boot_cpu(void);
105 void native_smp_prepare_cpus(unsigned int max_cpus);
106 void native_smp_cpus_done(unsigned int max_cpus);
107 int native_cpu_up(unsigned int cpunum);
109 extern int __cpu_disable(void);
110 extern void __cpu_die(unsigned int cpu);
112 extern void prefill_possible_map(void);
114 void smp_store_cpu_info(int id);
115 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
117 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
118 static inline int num_booting_cpus(void)
120 return cpus_weight(cpu_callout_map);
123 static inline void prefill_possible_map(void)
126 #endif /* CONFIG_SMP */
128 extern unsigned disabled_cpus __cpuinitdata;
130 #ifdef CONFIG_X86_32_SMP
132 * This function is needed by all SMP systems. It must _always_ be valid
133 * from the initial startup. We map APIC_BASE very early in page_setup(),
134 * so this is correct in the x86 case.
136 DECLARE_PER_CPU(int, cpu_number);
137 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
138 extern int safe_smp_processor_id(void);
140 #elif defined(CONFIG_X86_64_SMP)
141 #define raw_smp_processor_id() read_pda(cpunumber)
143 #define stack_smp_processor_id() \
145 struct thread_info *ti; \
146 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
149 #define safe_smp_processor_id() smp_processor_id()
151 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
152 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
153 #define safe_smp_processor_id() 0
154 #define stack_smp_processor_id() 0
157 #ifdef CONFIG_X86_LOCAL_APIC
159 static inline int logical_smp_processor_id(void)
161 /* we don't want to mark this access volatile - bad code generation */
162 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
165 #ifndef CONFIG_X86_64
166 static inline unsigned int read_apic_id(void)
168 return *(u32 *)(APIC_BASE + APIC_ID);
171 extern unsigned int read_apic_id(void);
175 # ifdef APIC_DEFINITION
176 extern int hard_smp_processor_id(void);
178 # include <mach_apicdef.h>
179 static inline int hard_smp_processor_id(void)
181 /* we don't want to mark this access volatile - bad code generation */
182 return GET_APIC_ID(read_apic_id());
184 # endif /* APIC_DEFINITION */
186 #else /* CONFIG_X86_LOCAL_APIC */
189 # define hard_smp_processor_id() 0
192 #endif /* CONFIG_X86_LOCAL_APIC */
194 #ifdef CONFIG_HOTPLUG_CPU
195 extern void cpu_uninit(void);
198 extern void lock_ipi_call_lock(void);
199 extern void unlock_ipi_call_lock(void);
200 #endif /* __ASSEMBLY__ */