arch/x86/include/asm/smp.h

   1 #ifndef _ASM_X86_SMP_H
   2 #define _ASM_X86_SMP_H
   3 #ifndef __ASSEMBLY__
   4 #include <linux/cpumask.h>
   5 #include <asm/percpu.h>
   6
   7 /*
   8  * We need the APIC definitions automatically as part of 'smp.h'
   9  */
  10 #ifdef CONFIG_X86_LOCAL_APIC
  11 # include <asm/mpspec.h>
  12 # include <asm/apic.h>
  13 # ifdef CONFIG_X86_IO_APIC
  14 #  include <asm/io_apic.h>
  15 # endif
  16 #endif
  17 #include <asm/thread_info.h>
  18 #include <asm/cpumask.h>
  19
  20 extern int smp_num_siblings;
  21 extern unsigned int num_processors;
  22
  23 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
  24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
  25 /* cpus sharing the last level cache: */
  26 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
  27 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
  28 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
  29
  30 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
  31 {
  32         return per_cpu(cpu_llc_shared_map, cpu);
  33 }
  34
  35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
  36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
  37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
  38 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  39 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
  40 #endif
  41
  42 struct task_struct;
  43
  44 struct smp_ops {
  45         void (*smp_prepare_boot_cpu)(void);
  46         void (*smp_prepare_cpus)(unsigned max_cpus);
  47         void (*smp_cpus_done)(unsigned max_cpus);
  48
  49         void (*stop_other_cpus)(int wait);
  50         void (*smp_send_reschedule)(int cpu);
  51
  52         int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
  53         int (*cpu_disable)(void);
  54         void (*cpu_die)(unsigned int cpu);
  55         void (*play_dead)(void);
  56
  57         void (*send_call_func_ipi)(const struct cpumask *mask);
  58         void (*send_call_func_single_ipi)(int cpu);
  59 };
  60
  61 /* Globals due to paravirt */
  62 extern void set_cpu_sibling_map(int cpu);
  63
  64 #ifdef CONFIG_SMP
  65 extern struct smp_ops smp_ops;
  66
  67 static inline void smp_send_stop(void)
  68 {
  69         smp_ops.stop_other_cpus(0);
  70 }
  71
  72 static inline void stop_other_cpus(void)
  73 {
  74         smp_ops.stop_other_cpus(1);
  75 }
  76
  77 static inline void smp_prepare_boot_cpu(void)
  78 {
  79         smp_ops.smp_prepare_boot_cpu();
  80 }
  81
  82 static inline void smp_prepare_cpus(unsigned int max_cpus)
  83 {
  84         smp_ops.smp_prepare_cpus(max_cpus);
  85 }
  86
  87 static inline void smp_cpus_done(unsigned int max_cpus)
  88 {
  89         smp_ops.smp_cpus_done(max_cpus);
  90 }
  91
  92 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
  93 {
  94         return smp_ops.cpu_up(cpu, tidle);
  95 }
  96
  97 static inline int __cpu_disable(void)
  98 {
  99         return smp_ops.cpu_disable();
 100 }
 101
 102 static inline void __cpu_die(unsigned int cpu)
 103 {
 104         smp_ops.cpu_die(cpu);
 105 }
 106
 107 static inline void play_dead(void)
 108 {
 109         smp_ops.play_dead();
 110 }
 111
 112 static inline void smp_send_reschedule(int cpu)
 113 {
 114         smp_ops.smp_send_reschedule(cpu);
 115 }
 116
 117 static inline void arch_send_call_function_single_ipi(int cpu)
 118 {
 119         smp_ops.send_call_func_single_ipi(cpu);
 120 }
 121
 122 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 123 {
 124         smp_ops.send_call_func_ipi(mask);
 125 }
 126
 127 void cpu_disable_common(void);
 128 void native_smp_prepare_boot_cpu(void);
 129 void native_smp_prepare_cpus(unsigned int max_cpus);
 130 void native_smp_cpus_done(unsigned int max_cpus);
 131 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 132 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 133 int native_cpu_disable(void);
 134 int common_cpu_die(unsigned int cpu);
 135 void native_cpu_die(unsigned int cpu);
 136 void hlt_play_dead(void);
 137 void native_play_dead(void);
 138 void play_dead_common(void);
 139 void wbinvd_on_cpu(int cpu);
 140 int wbinvd_on_all_cpus(void);
 141
 142 void native_send_call_func_ipi(const struct cpumask *mask);
 143 void native_send_call_func_single_ipi(int cpu);
 144 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 145
 146 void smp_store_boot_cpu_info(void);
 147 void smp_store_cpu_info(int id);
 148 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 149 #define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
 150
 151 #else /* !CONFIG_SMP */
 152 #define wbinvd_on_cpu(cpu)     wbinvd()
 153 static inline int wbinvd_on_all_cpus(void)
 154 {
 155         wbinvd();
 156         return 0;
 157 }
 158 #define smp_num_siblings        1
 159 #endif /* CONFIG_SMP */
 160
 161 extern unsigned disabled_cpus;
 162
 163 #ifdef CONFIG_X86_32_SMP
 164 /*
 165  * This function is needed by all SMP systems. It must _always_ be valid
 166  * from the initial startup. We map APIC_BASE very early in page_setup(),
 167  * so this is correct in the x86 case.
 168  */
 169 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
 170 extern int safe_smp_processor_id(void);
 171
 172 #elif defined(CONFIG_X86_64_SMP)
 173 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
 174
 175 #define safe_smp_processor_id()         smp_processor_id()
 176
 177 #endif
 178
 179 #ifdef CONFIG_X86_LOCAL_APIC
 180
 181 #ifndef CONFIG_X86_64
 182 static inline int logical_smp_processor_id(void)
 183 {
 184         /* we don't want to mark this access volatile - bad code generation */
 185         return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
 186 }
 187
 188 #endif
 189
 190 extern int hard_smp_processor_id(void);
 191
 192 #else /* CONFIG_X86_LOCAL_APIC */
 193
 194 # ifndef CONFIG_SMP
 195 #  define hard_smp_processor_id()       0
 196 # endif
 197
 198 #endif /* CONFIG_X86_LOCAL_APIC */
 199
 200 #ifdef CONFIG_DEBUG_NMI_SELFTEST
 201 extern void nmi_selftest(void);
 202 #else
 203 #define nmi_selftest() do { } while (0)
 204 #endif
 205
 206 #endif /* __ASSEMBLY__ */
 207 #endif /* _ASM_X86_SMP_H */