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 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
  36 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
  37 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
  38
  39 /* Static state in head.S used to set up a CPU */
  40 extern struct {
  41         void *sp;
  42         unsigned short ss;
  43 } stack_start;
  44
  45 struct smp_ops {
  46         void (*smp_prepare_boot_cpu)(void);
  47         void (*smp_prepare_cpus)(unsigned max_cpus);
  48         int (*cpu_up)(unsigned cpu);
  49         void (*smp_cpus_done)(unsigned max_cpus);
  50
  51         void (*smp_send_stop)(void);
  52         void (*smp_send_reschedule)(int cpu);
  53         int (*smp_call_function_mask)(cpumask_t mask,
  54                                       void (*func)(void *info), void *info,
  55                                       int wait);
  56 };
  57
  58 /* Globals due to paravirt */
  59 extern void set_cpu_sibling_map(int cpu);
  60
  61 #ifdef CONFIG_SMP
  62 #ifndef CONFIG_PARAVIRT
  63 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  64 #endif
  65 extern struct smp_ops smp_ops;
  66
  67 static inline void smp_send_stop(void)
  68 {
  69         smp_ops.smp_send_stop();
  70 }
  71
  72 static inline void smp_prepare_boot_cpu(void)
  73 {
  74         smp_ops.smp_prepare_boot_cpu();
  75 }
  76
  77 static inline void smp_prepare_cpus(unsigned int max_cpus)
  78 {
  79         smp_ops.smp_prepare_cpus(max_cpus);
  80 }
  81
  82 static inline void smp_cpus_done(unsigned int max_cpus)
  83 {
  84         smp_ops.smp_cpus_done(max_cpus);
  85 }
  86
  87 static inline int __cpu_up(unsigned int cpu)
  88 {
  89         return smp_ops.cpu_up(cpu);
  90 }
  91
  92 static inline void smp_send_reschedule(int cpu)
  93 {
  94         smp_ops.smp_send_reschedule(cpu);
  95 }
  96
  97 static inline int smp_call_function_mask(cpumask_t mask,
  98                                          void (*func) (void *info), void *info,
  99                                          int wait)
 100 {
 101         return smp_ops.smp_call_function_mask(mask, func, info, wait);
 102 }
 103
 104 void native_smp_prepare_boot_cpu(void);
 105 void native_smp_prepare_cpus(unsigned int max_cpus);
 106 void native_smp_cpus_done(unsigned int max_cpus);
 107 int native_cpu_up(unsigned int cpunum);
 108
 109 extern int __cpu_disable(void);
 110 extern void __cpu_die(unsigned int cpu);
 111
 112 void smp_store_cpu_info(int id);
 113 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 114
 115 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 116 static inline int num_booting_cpus(void)
 117 {
 118         return cpus_weight(cpu_callout_map);
 119 }
 120 #endif /* CONFIG_SMP */
 121
 122 #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
 123 extern void prefill_possible_map(void);
 124 #else
 125 static inline void prefill_possible_map(void)
 126 {
 127 }
 128 #endif
 129
 130 extern unsigned disabled_cpus __cpuinitdata;
 131
 132 #ifdef CONFIG_X86_32_SMP
 133 /*
 134  * This function is needed by all SMP systems. It must _always_ be valid
 135  * from the initial startup. We map APIC_BASE very early in page_setup(),
 136  * so this is correct in the x86 case.
 137  */
 138 DECLARE_PER_CPU(int, cpu_number);
 139 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 140 extern int safe_smp_processor_id(void);
 141
 142 #elif defined(CONFIG_X86_64_SMP)
 143 #define raw_smp_processor_id()  read_pda(cpunumber)
 144
 145 #define stack_smp_processor_id()                                        \
 146 ({                                                              \
 147         struct thread_info *ti;                                         \
 148         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 149         ti->cpu;                                                        \
 150 })
 151 #define safe_smp_processor_id()         smp_processor_id()
 152
 153 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
 154 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 155 #define safe_smp_processor_id()         0
 156 #define stack_smp_processor_id()        0
 157 #endif
 158
 159 #ifdef CONFIG_X86_LOCAL_APIC
 160
 161 #ifndef CONFIG_X86_64
 162 static inline int logical_smp_processor_id(void)
 163 {
 164         /* we don't want to mark this access volatile - bad code generation */
 165         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 166 }
 167
 168 static inline unsigned int read_apic_id(void)
 169 {
 170         return *(u32 *)(APIC_BASE + APIC_ID);
 171 }
 172 #endif
 173
 174
 175 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
 176 extern int hard_smp_processor_id(void);
 177 # else
 178 #  include <mach_apicdef.h>
 179 static inline int hard_smp_processor_id(void)
 180 {
 181         /* we don't want to mark this access volatile - bad code generation */
 182         return GET_APIC_ID(read_apic_id());
 183 }
 184 # endif /* APIC_DEFINITION */
 185
 186 #else /* CONFIG_X86_LOCAL_APIC */
 187
 188 # ifndef CONFIG_SMP
 189 #  define hard_smp_processor_id()       0
 190 # endif
 191
 192 #endif /* CONFIG_X86_LOCAL_APIC */
 193
 194 #ifdef CONFIG_HOTPLUG_CPU
 195 extern void cpu_uninit(void);
 196 #endif
 197
 198 extern void lock_ipi_call_lock(void);
 199 extern void unlock_ipi_call_lock(void);
 200 #endif /* __ASSEMBLY__ */
 201 #endif