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 #ifdef CONFIG_SMP
  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;
  37 #else
  38 #define x86_cpu_to_apicid_early_ptr NULL
  39 #define x86_bios_cpu_apicid_early_ptr NULL
  40 #endif
  41
  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);
  47
  48 /* Static state in head.S used to set up a CPU */
  49 extern struct {
  50         void *sp;
  51         unsigned short ss;
  52 } stack_start;
  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 void prefill_possible_map(void);
 122
 123 void smp_store_cpu_info(int id);
 124 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 125
 126 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 127 static inline int num_booting_cpus(void)
 128 {
 129         return cpus_weight(cpu_callout_map);
 130 }
 131 #endif /* CONFIG_SMP */
 132
 133 extern unsigned disabled_cpus __cpuinitdata;
 134
 135 #ifdef CONFIG_X86_32_SMP
 136 /*
 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.
 140  */
 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);
 144
 145 #elif defined(CONFIG_X86_64_SMP)
 146 #define raw_smp_processor_id()  read_pda(cpunumber)
 147
 148 #define stack_smp_processor_id()                                        \
 149 ({                                                              \
 150         struct thread_info *ti;                                         \
 151         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 152         ti->cpu;                                                        \
 153 })
 154 #define safe_smp_processor_id()         smp_processor_id()
 155
 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
 160 #endif
 161
 162 #ifdef CONFIG_X86_LOCAL_APIC
 163
 164 static inline int logical_smp_processor_id(void)
 165 {
 166         /* we don't want to mark this access volatile - bad code generation */
 167         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 168 }
 169
 170 #ifndef CONFIG_X86_64
 171 static inline unsigned int read_apic_id(void)
 172 {
 173         return *(u32 *)(APIC_BASE + APIC_ID);
 174 }
 175 #else
 176 extern unsigned int read_apic_id(void);
 177 #endif
 178
 179
 180 # ifdef APIC_DEFINITION
 181 extern int hard_smp_processor_id(void);
 182 # else
 183 #  include <mach_apicdef.h>
 184 static inline int hard_smp_processor_id(void)
 185 {
 186         /* we don't want to mark this access volatile - bad code generation */
 187         return GET_APIC_ID(read_apic_id());
 188 }
 189 # endif /* APIC_DEFINITION */
 190
 191 #else /* CONFIG_X86_LOCAL_APIC */
 192
 193 # ifndef CONFIG_SMP
 194 #  define hard_smp_processor_id()       0
 195 # endif
 196
 197 #endif /* CONFIG_X86_LOCAL_APIC */
 198
 199 #ifdef CONFIG_HOTPLUG_CPU
 200 extern void cpu_exit_clear(void);
 201 extern void cpu_uninit(void);
 202 #endif
 203
 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__ */
 208 #endif