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;
33 extern u16 x86_cpu_to_apicid_init[];
34 extern u16 x86_bios_cpu_apicid_init[];
35 extern void *x86_cpu_to_apicid_early_ptr;
36 extern void *x86_bios_cpu_apicid_early_ptr;
38 #define x86_cpu_to_apicid_early_ptr NULL
39 #define x86_bios_cpu_apicid_early_ptr NULL
42 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
43 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
44 DECLARE_PER_CPU(u16, cpu_llc_id);
45 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
46 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
48 /* Static state in head.S used to set up a CPU */
55 void (*smp_prepare_boot_cpu)(void);
56 void (*smp_prepare_cpus)(unsigned max_cpus);
57 int (*cpu_up)(unsigned cpu);
58 void (*smp_cpus_done)(unsigned max_cpus);
60 void (*smp_send_stop)(void);
61 void (*smp_send_reschedule)(int cpu);
62 int (*smp_call_function_mask)(cpumask_t mask,
63 void (*func)(void *info), void *info,
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 void smp_send_reschedule(int cpu)
103 smp_ops.smp_send_reschedule(cpu);
106 static inline int smp_call_function_mask(cpumask_t mask,
107 void (*func) (void *info), void *info,
110 return smp_ops.smp_call_function_mask(mask, func, info, wait);
113 void native_smp_prepare_boot_cpu(void);
114 void native_smp_prepare_cpus(unsigned int max_cpus);
115 void native_smp_cpus_done(unsigned int max_cpus);
116 int native_cpu_up(unsigned int cpunum);
118 extern int __cpu_disable(void);
119 extern void __cpu_die(unsigned int cpu);
121 extern void prefill_possible_map(void);
123 void smp_store_cpu_info(int id);
124 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
126 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
127 static inline int num_booting_cpus(void)
129 return cpus_weight(cpu_callout_map);
131 #endif /* CONFIG_SMP */
133 extern unsigned disabled_cpus __cpuinitdata;
135 #ifdef CONFIG_X86_32_SMP
137 * This function is needed by all SMP systems. It must _always_ be valid
138 * from the initial startup. We map APIC_BASE very early in page_setup(),
139 * so this is correct in the x86 case.
141 DECLARE_PER_CPU(int, cpu_number);
142 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
143 extern int safe_smp_processor_id(void);
145 #elif defined(CONFIG_X86_64_SMP)
146 #define raw_smp_processor_id() read_pda(cpunumber)
148 #define stack_smp_processor_id() \
150 struct thread_info *ti; \
151 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
154 #define safe_smp_processor_id() smp_processor_id()
156 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
157 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
158 #define safe_smp_processor_id() 0
159 #define stack_smp_processor_id() 0
162 #ifdef CONFIG_X86_LOCAL_APIC
164 static inline int logical_smp_processor_id(void)
166 /* we don't want to mark this access volatile - bad code generation */
167 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
170 #ifndef CONFIG_X86_64
171 static inline unsigned int read_apic_id(void)
173 return *(u32 *)(APIC_BASE + APIC_ID);
176 extern unsigned int read_apic_id(void);
180 # ifdef APIC_DEFINITION
181 extern int hard_smp_processor_id(void);
183 # include <mach_apicdef.h>
184 static inline int hard_smp_processor_id(void)
186 /* we don't want to mark this access volatile - bad code generation */
187 return GET_APIC_ID(read_apic_id());
189 # endif /* APIC_DEFINITION */
191 #else /* CONFIG_X86_LOCAL_APIC */
194 # define hard_smp_processor_id() 0
197 #endif /* CONFIG_X86_LOCAL_APIC */
199 #ifdef CONFIG_HOTPLUG_CPU
200 extern void cpu_exit_clear(void);
201 extern void cpu_uninit(void);
204 extern void smp_alloc_memory(void);
205 extern void lock_ipi_call_lock(void);
206 extern void unlock_ipi_call_lock(void);
207 #endif /* __ASSEMBLY__ */