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 (*crash_stop_other_cpus)(void);
  51         void (*smp_send_reschedule)(int cpu);
  52
  53         int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
  54         int (*cpu_disable)(void);
  55         void (*cpu_die)(unsigned int cpu);
  56         void (*play_dead)(void);
  57
  58         void (*send_call_func_ipi)(const struct cpumask *mask);
  59         void (*send_call_func_single_ipi)(int cpu);
  60 };
  61
  62 /* Globals due to paravirt */
  63 extern void set_cpu_sibling_map(int cpu);
  64
  65 #ifdef CONFIG_SMP
  66 extern struct smp_ops smp_ops;
  67
  68 static inline void smp_send_stop(void)
  69 {
  70         smp_ops.stop_other_cpus(0);
  71 }
  72
  73 static inline void stop_other_cpus(void)
  74 {
  75         smp_ops.stop_other_cpus(1);
  76 }
  77
  78 static inline void smp_prepare_boot_cpu(void)
  79 {
  80         smp_ops.smp_prepare_boot_cpu();
  81 }
  82
  83 static inline void smp_prepare_cpus(unsigned int max_cpus)
  84 {
  85         smp_ops.smp_prepare_cpus(max_cpus);
  86 }
  87
  88 static inline void smp_cpus_done(unsigned int max_cpus)
  89 {
  90         smp_ops.smp_cpus_done(max_cpus);
  91 }
  92
  93 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
  94 {
  95         return smp_ops.cpu_up(cpu, tidle);
  96 }
  97
  98 static inline int __cpu_disable(void)
  99 {
 100         return smp_ops.cpu_disable();
 101 }
 102
 103 static inline void __cpu_die(unsigned int cpu)
 104 {
 105         smp_ops.cpu_die(cpu);
 106 }
 107
 108 static inline void play_dead(void)
 109 {
 110         smp_ops.play_dead();
 111 }
 112
 113 static inline void smp_send_reschedule(int cpu)
 114 {
 115         smp_ops.smp_send_reschedule(cpu);
 116 }
 117
 118 static inline void arch_send_call_function_single_ipi(int cpu)
 119 {
 120         smp_ops.send_call_func_single_ipi(cpu);
 121 }
 122
 123 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 124 {
 125         smp_ops.send_call_func_ipi(mask);
 126 }
 127
 128 void cpu_disable_common(void);
 129 void native_smp_prepare_boot_cpu(void);
 130 void native_smp_prepare_cpus(unsigned int max_cpus);
 131 void native_smp_cpus_done(unsigned int max_cpus);
 132 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 133 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 134 int native_cpu_disable(void);
 135 int common_cpu_die(unsigned int cpu);
 136 void native_cpu_die(unsigned int cpu);
 137 void hlt_play_dead(void);
 138 void native_play_dead(void);
 139 void play_dead_common(void);
 140 void wbinvd_on_cpu(int cpu);
 141 int wbinvd_on_all_cpus(void);
 142
 143 void native_send_call_func_ipi(const struct cpumask *mask);
 144 void native_send_call_func_single_ipi(int cpu);
 145 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 146
 147 void smp_store_boot_cpu_info(void);
 148 void smp_store_cpu_info(int id);
 149 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 150 #define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
 151
 152 #else /* !CONFIG_SMP */
 153 #define wbinvd_on_cpu(cpu)     wbinvd()
 154 static inline int wbinvd_on_all_cpus(void)
 155 {
 156         wbinvd();
 157         return 0;
 158 }
 159 #define smp_num_siblings        1
 160 #endif /* CONFIG_SMP */
 161
 162 extern unsigned disabled_cpus;
 163
 164 #ifdef CONFIG_X86_32_SMP
 165 /*
 166  * This function is needed by all SMP systems. It must _always_ be valid
 167  * from the initial startup. We map APIC_BASE very early in page_setup(),
 168  * so this is correct in the x86 case.
 169  */
 170 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
 171 extern int safe_smp_processor_id(void);
 172
 173 #elif defined(CONFIG_X86_64_SMP)
 174 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
 175
 176 #define safe_smp_processor_id()         smp_processor_id()
 177
 178 #endif
 179
 180 #ifdef CONFIG_X86_LOCAL_APIC
 181
 182 #ifndef CONFIG_X86_64
 183 static inline int logical_smp_processor_id(void)
 184 {
 185         /* we don't want to mark this access volatile - bad code generation */
 186         return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
 187 }
 188
 189 #endif
 190
 191 extern int hard_smp_processor_id(void);
 192
 193 #else /* CONFIG_X86_LOCAL_APIC */
 194
 195 # ifndef CONFIG_SMP
 196 #  define hard_smp_processor_id()       0
 197 # endif
 198
 199 #endif /* CONFIG_X86_LOCAL_APIC */
 200
 201 #ifdef CONFIG_DEBUG_NMI_SELFTEST
 202 extern void nmi_selftest(void);
 203 #else
 204 #define nmi_selftest() do { } while (0)
 205 #endif
 206
 207 #endif /* __ASSEMBLY__ */
 208 #endif /* _ASM_X86_SMP_H */