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 __cpuinit get_local_pda(int cpu);
  29
  30 extern int smp_num_siblings;
  31 extern unsigned int num_processors;
  32 extern cpumask_t cpu_initialized;
  33
  34 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  35 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  36 DECLARE_PER_CPU(u16, cpu_llc_id);
  37 #ifdef CONFIG_X86_32
  38 DECLARE_PER_CPU(int, cpu_number);
  39 #endif
  40
  41 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
  42 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
  43
  44 /* Static state in head.S used to set up a CPU */
  45 extern struct {
  46         void *sp;
  47         unsigned short ss;
  48 } stack_start;
  49
  50 struct smp_ops {
  51         void (*smp_prepare_boot_cpu)(void);
  52         void (*smp_prepare_cpus)(unsigned max_cpus);
  53         void (*smp_cpus_done)(unsigned max_cpus);
  54
  55         void (*smp_send_stop)(void);
  56         void (*smp_send_reschedule)(int cpu);
  57
  58         int (*cpu_up)(unsigned cpu);
  59         int (*cpu_disable)(void);
  60         void (*cpu_die)(unsigned int cpu);
  61         void (*play_dead)(void);
  62
  63         void (*send_call_func_ipi)(cpumask_t mask);
  64         void (*send_call_func_single_ipi)(int cpu);
  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 int __cpu_disable(void)
 102 {
 103         return smp_ops.cpu_disable();
 104 }
 105
 106 static inline void __cpu_die(unsigned int cpu)
 107 {
 108         smp_ops.cpu_die(cpu);
 109 }
 110
 111 static inline void play_dead(void)
 112 {
 113         smp_ops.play_dead();
 114 }
 115
 116 static inline void smp_send_reschedule(int cpu)
 117 {
 118         smp_ops.smp_send_reschedule(cpu);
 119 }
 120
 121 static inline void arch_send_call_function_single_ipi(int cpu)
 122 {
 123         smp_ops.send_call_func_single_ipi(cpu);
 124 }
 125
 126 static inline void arch_send_call_function_ipi(cpumask_t mask)
 127 {
 128         smp_ops.send_call_func_ipi(mask);
 129 }
 130
 131 void cpu_disable_common(void);
 132 void native_smp_prepare_boot_cpu(void);
 133 void native_smp_prepare_cpus(unsigned int max_cpus);
 134 void native_smp_cpus_done(unsigned int max_cpus);
 135 int native_cpu_up(unsigned int cpunum);
 136 int native_cpu_disable(void);
 137 void native_cpu_die(unsigned int cpu);
 138 void native_play_dead(void);
 139 void play_dead_common(void);
 140
 141 void native_send_call_func_ipi(cpumask_t mask);
 142 void native_send_call_func_single_ipi(int cpu);
 143
 144 extern void prefill_possible_map(void);
 145
 146 void smp_store_cpu_info(int id);
 147 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 148
 149 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 150 static inline int num_booting_cpus(void)
 151 {
 152         return cpus_weight(cpu_callout_map);
 153 }
 154 #else
 155 static inline void prefill_possible_map(void)
 156 {
 157 }
 158 #endif /* CONFIG_SMP */
 159
 160 extern unsigned disabled_cpus __cpuinitdata;
 161
 162 #ifdef CONFIG_X86_32_SMP
 163 /*
 164  * This function is needed by all SMP systems. It must _always_ be valid
 165  * from the initial startup. We map APIC_BASE very early in page_setup(),
 166  * so this is correct in the x86 case.
 167  */
 168 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 169 extern int safe_smp_processor_id(void);
 170
 171 #elif defined(CONFIG_X86_64_SMP)
 172 #define raw_smp_processor_id()  read_pda(cpunumber)
 173
 174 #define stack_smp_processor_id()                                        \
 175 ({                                                              \
 176         struct thread_info *ti;                                         \
 177         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 178         ti->cpu;                                                        \
 179 })
 180 #define safe_smp_processor_id()         smp_processor_id()
 181
 182 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
 183 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 184 #define safe_smp_processor_id()         0
 185 #define stack_smp_processor_id()        0
 186 #endif
 187
 188 #ifdef CONFIG_X86_LOCAL_APIC
 189
 190 #ifndef CONFIG_X86_64
 191 static inline int logical_smp_processor_id(void)
 192 {
 193         /* we don't want to mark this access volatile - bad code generation */
 194         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 195 }
 196
 197 #include <mach_apicdef.h>
 198 static inline unsigned int read_apic_id(void)
 199 {
 200         unsigned int reg;
 201
 202         reg = *(u32 *)(APIC_BASE + APIC_ID);
 203
 204         return GET_APIC_ID(reg);
 205 }
 206 #endif
 207
 208
 209 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
 210 extern int hard_smp_processor_id(void);
 211 # else
 212 #include <mach_apicdef.h>
 213 static inline int hard_smp_processor_id(void)
 214 {
 215         /* we don't want to mark this access volatile - bad code generation */
 216         return read_apic_id();
 217 }
 218 # endif /* APIC_DEFINITION */
 219
 220 #else /* CONFIG_X86_LOCAL_APIC */
 221
 222 # ifndef CONFIG_SMP
 223 #  define hard_smp_processor_id()       0
 224 # endif
 225
 226 #endif /* CONFIG_X86_LOCAL_APIC */
 227
 228 #endif /* __ASSEMBLY__ */
 229 #endif /* ASM_X86__SMP_H */