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);
49 * Trampoline 80x86 program as an array.
51 extern const unsigned char trampoline_data [];
52 extern const unsigned char trampoline_end [];
53 extern unsigned char *trampoline_base;
55 /* Static state in head.S used to set up a CPU */
61 extern unsigned long init_rsp;
62 extern unsigned long initial_code;
65 void (*smp_prepare_boot_cpu)(void);
66 void (*smp_prepare_cpus)(unsigned max_cpus);
67 int (*cpu_up)(unsigned cpu);
68 void (*smp_cpus_done)(unsigned max_cpus);
70 void (*smp_send_stop)(void);
71 void (*smp_send_reschedule)(int cpu);
72 int (*smp_call_function_mask)(cpumask_t mask,
73 void (*func)(void *info), void *info,
77 /* Globals due to paravirt */
78 extern void set_cpu_sibling_map(int cpu);
81 #ifndef CONFIG_PARAVIRT
82 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
84 extern struct smp_ops smp_ops;
86 static inline void smp_send_stop(void)
88 smp_ops.smp_send_stop();
91 static inline void smp_prepare_boot_cpu(void)
93 smp_ops.smp_prepare_boot_cpu();
96 static inline void smp_prepare_cpus(unsigned int max_cpus)
98 smp_ops.smp_prepare_cpus(max_cpus);
101 static inline void smp_cpus_done(unsigned int max_cpus)
103 smp_ops.smp_cpus_done(max_cpus);
106 static inline int __cpu_up(unsigned int cpu)
108 return smp_ops.cpu_up(cpu);
111 static inline void smp_send_reschedule(int cpu)
113 smp_ops.smp_send_reschedule(cpu);
116 static inline int smp_call_function_mask(cpumask_t mask,
117 void (*func) (void *info), void *info,
120 return smp_ops.smp_call_function_mask(mask, func, info, wait);
123 void native_smp_prepare_boot_cpu(void);
124 void native_smp_prepare_cpus(unsigned int max_cpus);
125 void native_smp_cpus_done(unsigned int max_cpus);
126 int native_cpu_up(unsigned int cpunum);
128 extern int __cpu_disable(void);
129 extern void __cpu_die(unsigned int cpu);
131 extern void prefill_possible_map(void);
133 #define SMP_TRAMPOLINE_BASE 0x6000
134 extern unsigned long setup_trampoline(void);
136 void smp_store_cpu_info(int id);
137 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
139 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
140 static inline int num_booting_cpus(void)
142 return cpus_weight(cpu_callout_map);
144 #endif /* CONFIG_SMP */
146 extern unsigned disabled_cpus __cpuinitdata;
148 #ifdef CONFIG_X86_32_SMP
150 * This function is needed by all SMP systems. It must _always_ be valid
151 * from the initial startup. We map APIC_BASE very early in page_setup(),
152 * so this is correct in the x86 case.
154 DECLARE_PER_CPU(int, cpu_number);
155 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
156 extern int safe_smp_processor_id(void);
158 #elif defined(CONFIG_X86_64_SMP)
159 #define raw_smp_processor_id() read_pda(cpunumber)
161 #define stack_smp_processor_id() \
163 struct thread_info *ti; \
164 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
167 #define safe_smp_processor_id() smp_processor_id()
169 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
170 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
171 #define safe_smp_processor_id() 0
172 #define stack_smp_processor_id() 0
175 #ifdef CONFIG_X86_LOCAL_APIC
177 static inline int logical_smp_processor_id(void)
179 /* we don't want to mark this access volatile - bad code generation */
180 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
183 #ifndef CONFIG_X86_64
184 static inline unsigned int read_apic_id(void)
186 return *(u32 *)(APIC_BASE + APIC_ID);
189 extern unsigned int read_apic_id(void);
193 # ifdef APIC_DEFINITION
194 extern int hard_smp_processor_id(void);
196 # include <mach_apicdef.h>
197 static inline int hard_smp_processor_id(void)
199 /* we don't want to mark this access volatile - bad code generation */
200 return GET_APIC_ID(read_apic_id());
202 # endif /* APIC_DEFINITION */
204 #else /* CONFIG_X86_LOCAL_APIC */
207 # define hard_smp_processor_id() 0
210 #endif /* CONFIG_X86_LOCAL_APIC */
212 #ifdef CONFIG_HOTPLUG_CPU
213 extern void cpu_exit_clear(void);
214 extern void cpu_uninit(void);
215 extern void remove_siblinginfo(int cpu);
218 extern void smp_alloc_memory(void);
219 extern void lock_ipi_call_lock(void);
220 extern void unlock_ipi_call_lock(void);
221 #endif /* __ASSEMBLY__ */