include/asm-x86/smp.h

   1 #ifndef _ASM_X86_SMP_H_
   2 #define _ASM_X86_SMP_H_
   3 #ifndef __ASSEMBLY__
   4 #include <linux/cpumask.h>
   5 #include <linux/init.h>
   6 #include <asm/percpu.h>
   7
   8 /*
   9  * We need the APIC definitions automatically as part of 'smp.h'
  10  */
  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>
  16 # endif
  17 #endif
  18 #include <asm/pda.h>
  19 #include <asm/thread_info.h>
  20
  21 extern cpumask_t cpu_callout_map;
  22
  23 extern int smp_num_siblings;
  24 extern unsigned int num_processors;
  25 extern cpumask_t cpu_initialized;
  26
  27 extern u16 x86_cpu_to_apicid_init[];
  28 extern u16 x86_bios_cpu_apicid_init[];
  29 extern void *x86_cpu_to_apicid_early_ptr;
  30 extern void *x86_bios_cpu_apicid_early_ptr;
  31
  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);
  35 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
  36 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
  37
  38 /*
  39  * Trampoline 80x86 program as an array.
  40  */
  41 extern const unsigned char trampoline_data [];
  42 extern const unsigned char trampoline_end  [];
  43 extern unsigned char *trampoline_base;
  44
  45 /* Static state in head.S used to set up a CPU */
  46 extern struct {
  47         void *sp;
  48         unsigned short ss;
  49 } stack_start;
  50
  51 extern unsigned long init_rsp;
  52 extern unsigned long initial_code;
  53
  54 struct smp_ops {
  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);
  59
  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,
  64                                       int wait);
  65 };
  66
  67 /* Globals due to paravirt */
  68 extern void set_cpu_sibling_map(int cpu);
  69
  70 #ifdef CONFIG_SMP
  71 #ifndef CONFIG_PARAVIRT
  72 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  73 #endif
  74 extern struct smp_ops smp_ops;
  75
  76 static inline void smp_send_stop(void)
  77 {
  78         smp_ops.smp_send_stop();
  79 }
  80
  81 static inline void smp_prepare_boot_cpu(void)
  82 {
  83         smp_ops.smp_prepare_boot_cpu();
  84 }
  85
  86 static inline void smp_prepare_cpus(unsigned int max_cpus)
  87 {
  88         smp_ops.smp_prepare_cpus(max_cpus);
  89 }
  90
  91 static inline void smp_cpus_done(unsigned int max_cpus)
  92 {
  93         smp_ops.smp_cpus_done(max_cpus);
  94 }
  95
  96 static inline int __cpu_up(unsigned int cpu)
  97 {
  98         return smp_ops.cpu_up(cpu);
  99 }
 100
 101 static inline void smp_send_reschedule(int cpu)
 102 {
 103         smp_ops.smp_send_reschedule(cpu);
 104 }
 105
 106 static inline int smp_call_function_mask(cpumask_t mask,
 107                                          void (*func) (void *info), void *info,
 108                                          int wait)
 109 {
 110         return smp_ops.smp_call_function_mask(mask, func, info, wait);
 111 }
 112
 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);
 117
 118 extern int __cpu_disable(void);
 119 extern void __cpu_die(unsigned int cpu);
 120
 121 extern unsigned disabled_cpus;
 122 extern void prefill_possible_map(void);
 123
 124 #define SMP_TRAMPOLINE_BASE 0x6000
 125 extern unsigned long setup_trampoline(void);
 126
 127 void smp_store_cpu_info(int id);
 128 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 129
 130 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 131 static inline int num_booting_cpus(void)
 132 {
 133         return cpus_weight(cpu_callout_map);
 134 }
 135 #endif /* CONFIG_SMP */
 136
 137 #ifdef CONFIG_X86_32_SMP
 138 /*
 139  * This function is needed by all SMP systems. It must _always_ be valid
 140  * from the initial startup. We map APIC_BASE very early in page_setup(),
 141  * so this is correct in the x86 case.
 142  */
 143 DECLARE_PER_CPU(int, cpu_number);
 144 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 145 extern int safe_smp_processor_id(void);
 146
 147 #elif defined(CONFIG_X86_64_SMP)
 148 #define raw_smp_processor_id()  read_pda(cpunumber)
 149
 150 #define stack_smp_processor_id()                                        \
 151 ({                                                              \
 152         struct thread_info *ti;                                         \
 153         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 154         ti->cpu;                                                        \
 155 })
 156 #define safe_smp_processor_id()         smp_processor_id()
 157
 158 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
 159 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 160 #define safe_smp_processor_id()         0
 161 #define stack_smp_processor_id()        0
 162 #endif
 163
 164 #ifdef CONFIG_X86_32
 165 # include "smp_32.h"
 166 #else
 167 # include "smp_64.h"
 168 #endif
 169
 170 #ifdef CONFIG_X86_LOCAL_APIC
 171
 172 static inline int logical_smp_processor_id(void)
 173 {
 174         /* we don't want to mark this access volatile - bad code generation */
 175         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 176 }
 177
 178 # ifdef APIC_DEFINITION
 179 extern int hard_smp_processor_id(void);
 180 # else
 181 #  include <mach_apicdef.h>
 182 static inline int hard_smp_processor_id(void)
 183 {
 184         /* we don't want to mark this access volatile - bad code generation */
 185         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
 186 }
 187 # endif /* APIC_DEFINITION */
 188
 189 #else /* CONFIG_X86_LOCAL_APIC */
 190
 191 # ifndef CONFIG_SMP
 192 #  define hard_smp_processor_id()       0
 193 # endif
 194
 195 #endif /* CONFIG_X86_LOCAL_APIC */
 196
 197 #ifdef CONFIG_HOTPLUG_CPU
 198 extern void cpu_exit_clear(void);
 199 extern void cpu_uninit(void);
 200 extern void remove_siblinginfo(int cpu);
 201 #endif
 202
 203 extern void smp_alloc_memory(void);
 204 extern void lock_ipi_call_lock(void);
 205 extern void unlock_ipi_call_lock(void);
 206 #endif /* __ASSEMBLY__ */
 207 #endif