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 extern cpumask_t cpu_initialized;
  23 extern cpumask_t cpu_callin_map;
  24
  25 extern void (*mtrr_hook)(void);
  26 extern void zap_low_mappings(void);
  27
  28 extern int smp_num_siblings;
  29 extern unsigned int num_processors;
  30 extern cpumask_t cpu_initialized;
  31
  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;
  36
  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);
  42
  43 /*
  44  * Trampoline 80x86 program as an array.
  45  */
  46 extern const unsigned char trampoline_data [];
  47 extern const unsigned char trampoline_end  [];
  48 extern unsigned char *trampoline_base;
  49
  50 /* Static state in head.S used to set up a CPU */
  51 extern struct {
  52         void *sp;
  53         unsigned short ss;
  54 } stack_start;
  55
  56 extern unsigned long init_rsp;
  57 extern unsigned long initial_code;
  58
  59 struct smp_ops {
  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);
  64
  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,
  69                                       int wait);
  70 };
  71
  72 /* Globals due to paravirt */
  73 extern void set_cpu_sibling_map(int cpu);
  74
  75 #ifdef CONFIG_SMP
  76 #ifndef CONFIG_PARAVIRT
  77 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  78 #endif
  79 extern struct smp_ops smp_ops;
  80
  81 static inline void smp_send_stop(void)
  82 {
  83         smp_ops.smp_send_stop();
  84 }
  85
  86 static inline void smp_prepare_boot_cpu(void)
  87 {
  88         smp_ops.smp_prepare_boot_cpu();
  89 }
  90
  91 static inline void smp_prepare_cpus(unsigned int max_cpus)
  92 {
  93         smp_ops.smp_prepare_cpus(max_cpus);
  94 }
  95
  96 static inline void smp_cpus_done(unsigned int max_cpus)
  97 {
  98         smp_ops.smp_cpus_done(max_cpus);
  99 }
 100
 101 static inline int __cpu_up(unsigned int cpu)
 102 {
 103         return smp_ops.cpu_up(cpu);
 104 }
 105
 106 static inline void smp_send_reschedule(int cpu)
 107 {
 108         smp_ops.smp_send_reschedule(cpu);
 109 }
 110
 111 static inline int smp_call_function_mask(cpumask_t mask,
 112                                          void (*func) (void *info), void *info,
 113                                          int wait)
 114 {
 115         return smp_ops.smp_call_function_mask(mask, func, info, wait);
 116 }
 117
 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);
 122
 123 extern int __cpu_disable(void);
 124 extern void __cpu_die(unsigned int cpu);
 125
 126 extern unsigned disabled_cpus;
 127 extern void prefill_possible_map(void);
 128
 129 #define SMP_TRAMPOLINE_BASE 0x6000
 130 extern unsigned long setup_trampoline(void);
 131
 132 void smp_store_cpu_info(int id);
 133 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 134
 135 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 136 static inline int num_booting_cpus(void)
 137 {
 138         return cpus_weight(cpu_callout_map);
 139 }
 140 #endif /* CONFIG_SMP */
 141
 142 #ifdef CONFIG_X86_32_SMP
 143 /*
 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.
 147  */
 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);
 151
 152 #elif defined(CONFIG_X86_64_SMP)
 153 #define raw_smp_processor_id()  read_pda(cpunumber)
 154
 155 #define stack_smp_processor_id()                                        \
 156 ({                                                              \
 157         struct thread_info *ti;                                         \
 158         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 159         ti->cpu;                                                        \
 160 })
 161 #define safe_smp_processor_id()         smp_processor_id()
 162
 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
 167 #endif
 168
 169 #ifdef CONFIG_X86_LOCAL_APIC
 170
 171 static inline int logical_smp_processor_id(void)
 172 {
 173         /* we don't want to mark this access volatile - bad code generation */
 174         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 175 }
 176
 177 # ifdef APIC_DEFINITION
 178 extern int hard_smp_processor_id(void);
 179 # else
 180 #  include <mach_apicdef.h>
 181 static inline int hard_smp_processor_id(void)
 182 {
 183         /* we don't want to mark this access volatile - bad code generation */
 184         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
 185 }
 186 # endif /* APIC_DEFINITION */
 187
 188 #else /* CONFIG_X86_LOCAL_APIC */
 189
 190 # ifndef CONFIG_SMP
 191 #  define hard_smp_processor_id()       0
 192 # endif
 193
 194 #endif /* CONFIG_X86_LOCAL_APIC */
 195
 196 #ifdef CONFIG_HOTPLUG_CPU
 197 extern void cpu_exit_clear(void);
 198 extern void cpu_uninit(void);
 199 extern void remove_siblinginfo(int cpu);
 200 #endif
 201
 202 extern void smp_alloc_memory(void);
 203 extern void lock_ipi_call_lock(void);
 204 extern void unlock_ipi_call_lock(void);
 205 #endif /* __ASSEMBLY__ */
 206 #endif