release/src-rt-6.x.4708/linux/linux-2.6.36/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 <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/thread_info.h>
  19 #include <asm/cpumask.h>
  20
  21 extern int smp_num_siblings;
  22 extern unsigned int num_processors;
  23
  24 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  25 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  26 DECLARE_PER_CPU(u16, cpu_llc_id);
  27 DECLARE_PER_CPU(int, cpu_number);
  28
  29 static inline struct cpumask *cpu_sibling_mask(int cpu)
  30 {
  31         return per_cpu(cpu_sibling_map, cpu);
  32 }
  33
  34 static inline struct cpumask *cpu_core_mask(int cpu)
  35 {
  36         return per_cpu(cpu_core_map, cpu);
  37 }
  38
  39 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
  40 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
  41
  42 /* Static state in head.S used to set up a CPU */
  43 extern struct {
  44         void *sp;
  45         unsigned short ss;
  46 } stack_start;
  47
  48 struct smp_ops {
  49         void (*smp_prepare_boot_cpu)(void);
  50         void (*smp_prepare_cpus)(unsigned max_cpus);
  51         void (*smp_cpus_done)(unsigned max_cpus);
  52
  53         void (*stop_other_cpus)(int wait);
  54         void (*smp_send_reschedule)(int cpu);
  55
  56         int (*cpu_up)(unsigned cpu);
  57         int (*cpu_disable)(void);
  58         void (*cpu_die)(unsigned int cpu);
  59         void (*play_dead)(void);
  60
  61         void (*send_call_func_ipi)(const struct cpumask *mask);
  62         void (*send_call_func_single_ipi)(int cpu);
  63 };
  64
  65 /* Globals due to paravirt */
  66 extern void set_cpu_sibling_map(int cpu);
  67
  68 #ifdef CONFIG_SMP
  69 #ifndef CONFIG_PARAVIRT
  70 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  71 #endif
  72 extern struct smp_ops smp_ops;
  73
  74 static inline void smp_send_stop(void)
  75 {
  76         smp_ops.stop_other_cpus(0);
  77 }
  78
  79 static inline void stop_other_cpus(void)
  80 {
  81         smp_ops.stop_other_cpus(1);
  82 }
  83
  84 static inline void smp_prepare_boot_cpu(void)
  85 {
  86         smp_ops.smp_prepare_boot_cpu();
  87 }
  88
  89 static inline void smp_prepare_cpus(unsigned int max_cpus)
  90 {
  91         smp_ops.smp_prepare_cpus(max_cpus);
  92 }
  93
  94 static inline void smp_cpus_done(unsigned int max_cpus)
  95 {
  96         smp_ops.smp_cpus_done(max_cpus);
  97 }
  98
  99 static inline int __cpu_up(unsigned int cpu)
 100 {
 101         return smp_ops.cpu_up(cpu);
 102 }
 103
 104 static inline int __cpu_disable(void)
 105 {
 106         return smp_ops.cpu_disable();
 107 }
 108
 109 static inline void __cpu_die(unsigned int cpu)
 110 {
 111         smp_ops.cpu_die(cpu);
 112 }
 113
 114 static inline void play_dead(void)
 115 {
 116         smp_ops.play_dead();
 117 }
 118
 119 static inline void smp_send_reschedule(int cpu)
 120 {
 121         smp_ops.smp_send_reschedule(cpu);
 122 }
 123
 124 static inline void arch_send_call_function_single_ipi(int cpu)
 125 {
 126         smp_ops.send_call_func_single_ipi(cpu);
 127 }
 128
 129 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 130 {
 131         smp_ops.send_call_func_ipi(mask);
 132 }
 133
 134 void cpu_disable_common(void);
 135 void native_smp_prepare_boot_cpu(void);
 136 void native_smp_prepare_cpus(unsigned int max_cpus);
 137 void native_smp_cpus_done(unsigned int max_cpus);
 138 int native_cpu_up(unsigned int cpunum);
 139 int native_cpu_disable(void);
 140 void native_cpu_die(unsigned int cpu);
 141 void native_play_dead(void);
 142 void play_dead_common(void);
 143 void wbinvd_on_cpu(int cpu);
 144 int wbinvd_on_all_cpus(void);
 145
 146 void native_send_call_func_ipi(const struct cpumask *mask);
 147 void native_send_call_func_single_ipi(int cpu);
 148
 149 void smp_store_cpu_info(int id);
 150 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 151
 152 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 153 static inline int num_booting_cpus(void)
 154 {
 155         return cpumask_weight(cpu_callout_mask);
 156 }
 157 #else /* !CONFIG_SMP */
 158 #define wbinvd_on_cpu(cpu)     wbinvd()
 159 static inline int wbinvd_on_all_cpus(void)
 160 {
 161         wbinvd();
 162         return 0;
 163 }
 164 #endif /* CONFIG_SMP */
 165
 166 extern unsigned disabled_cpus __cpuinitdata;
 167
 168 #ifdef CONFIG_X86_32_SMP
 169 /*
 170  * This function is needed by all SMP systems. It must _always_ be valid
 171  * from the initial startup. We map APIC_BASE very early in page_setup(),
 172  * so this is correct in the x86 case.
 173  */
 174 #define raw_smp_processor_id() (percpu_read(cpu_number))
 175 extern int safe_smp_processor_id(void);
 176
 177 #elif defined(CONFIG_X86_64_SMP)
 178 #define raw_smp_processor_id() (percpu_read(cpu_number))
 179
 180 #define stack_smp_processor_id()                                        \
 181 ({                                                              \
 182         struct thread_info *ti;                                         \
 183         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 184         ti->cpu;                                                        \
 185 })
 186 #define safe_smp_processor_id()         smp_processor_id()
 187
 188 #endif
 189
 190 #ifdef CONFIG_X86_LOCAL_APIC
 191
 192 #ifndef CONFIG_X86_64
 193 static inline int logical_smp_processor_id(void)
 194 {
 195         /* we don't want to mark this access volatile - bad code generation */
 196         return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
 197 }
 198
 199 #endif
 200
 201 extern int hard_smp_processor_id(void);
 202
 203 #else /* CONFIG_X86_LOCAL_APIC */
 204
 205 # ifndef CONFIG_SMP
 206 #  define hard_smp_processor_id()       0
 207 # endif
 208
 209 #endif /* CONFIG_X86_LOCAL_APIC */
 210
 211 #endif /* __ASSEMBLY__ */
 212 #endif /* _ASM_X86_SMP_H */