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 extern u16 x86_cpu_to_apicid_init[];
33 extern u16 x86_bios_cpu_apicid_init[];
34 extern void *x86_cpu_to_apicid_early_ptr;
35 extern void *x86_bios_cpu_apicid_early_ptr;
37 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
38 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
39 DECLARE_PER_CPU(u16, cpu_llc_id);
40 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
41 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
44 * Trampoline 80x86 program as an array.
46 extern const unsigned char trampoline_data [];
47 extern const unsigned char trampoline_end [];
48 extern unsigned char *trampoline_base;
50 /* Static state in head.S used to set up a CPU */
56 extern unsigned long init_rsp;
57 extern unsigned long initial_code;
60 void (*smp_prepare_boot_cpu)(void);
61 void (*smp_prepare_cpus)(unsigned max_cpus);
62 int (*cpu_up)(unsigned cpu);
63 void (*smp_cpus_done)(unsigned max_cpus);
65 void (*smp_send_stop)(void);
66 void (*smp_send_reschedule)(int cpu);
67 int (*smp_call_function_mask)(cpumask_t mask,
68 void (*func)(void *info), void *info,
72 /* Globals due to paravirt */
73 extern void set_cpu_sibling_map(int cpu);
76 #ifndef CONFIG_PARAVIRT
77 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
79 extern struct smp_ops smp_ops;
81 static inline void smp_send_stop(void)
83 smp_ops.smp_send_stop();
86 static inline void smp_prepare_boot_cpu(void)
88 smp_ops.smp_prepare_boot_cpu();
91 static inline void smp_prepare_cpus(unsigned int max_cpus)
93 smp_ops.smp_prepare_cpus(max_cpus);
96 static inline void smp_cpus_done(unsigned int max_cpus)
98 smp_ops.smp_cpus_done(max_cpus);
101 static inline int __cpu_up(unsigned int cpu)
103 return smp_ops.cpu_up(cpu);
106 static inline void smp_send_reschedule(int cpu)
108 smp_ops.smp_send_reschedule(cpu);
111 static inline int smp_call_function_mask(cpumask_t mask,
112 void (*func) (void *info), void *info,
115 return smp_ops.smp_call_function_mask(mask, func, info, wait);
118 void native_smp_prepare_boot_cpu(void);
119 void native_smp_prepare_cpus(unsigned int max_cpus);
120 void native_smp_cpus_done(unsigned int max_cpus);
121 int native_cpu_up(unsigned int cpunum);
123 extern int __cpu_disable(void);
124 extern void __cpu_die(unsigned int cpu);
126 extern unsigned disabled_cpus;
127 extern void prefill_possible_map(void);
129 #define SMP_TRAMPOLINE_BASE 0x6000
130 extern unsigned long setup_trampoline(void);
132 void smp_store_cpu_info(int id);
133 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
135 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
136 static inline int num_booting_cpus(void)
138 return cpus_weight(cpu_callout_map);
140 #endif /* CONFIG_SMP */
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 DECLARE_PER_CPU(int, cpu_number);
149 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
150 extern int safe_smp_processor_id(void);
152 #elif defined(CONFIG_X86_64_SMP)
153 #define raw_smp_processor_id() read_pda(cpunumber)
155 #define stack_smp_processor_id() \
157 struct thread_info *ti; \
158 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
161 #define safe_smp_processor_id() smp_processor_id()
163 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
164 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
165 #define safe_smp_processor_id() 0
166 #define stack_smp_processor_id() 0
169 #ifdef CONFIG_X86_LOCAL_APIC
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 static inline unsigned int read_apic_id(void)
179 return *(u32 *)(APIC_BASE + APIC_ID);
182 # ifdef APIC_DEFINITION
183 extern int hard_smp_processor_id(void);
185 # include <mach_apicdef.h>
186 static inline int hard_smp_processor_id(void)
188 /* we don't want to mark this access volatile - bad code generation */
189 return GET_APIC_ID(read_apic_id());
191 # endif /* APIC_DEFINITION */
193 #else /* CONFIG_X86_LOCAL_APIC */
196 # define hard_smp_processor_id() 0
199 #endif /* CONFIG_X86_LOCAL_APIC */
201 #ifdef CONFIG_HOTPLUG_CPU
202 extern void cpu_exit_clear(void);
203 extern void cpu_uninit(void);
204 extern void remove_siblinginfo(int cpu);
207 extern void smp_alloc_memory(void);
208 extern void lock_ipi_call_lock(void);
209 extern void unlock_ipi_call_lock(void);
210 #endif /* __ASSEMBLY__ */