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
  54         void (*send_call_func_ipi)(cpumask_t mask);
  55         void (*send_call_func_single_ipi)(int cpu);
  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 void arch_send_call_function_single_ipi(int cpu)
  98 {
  99         smp_ops.send_call_func_single_ipi(cpu);
 100 }
 101
 102 static inline void arch_send_call_function_ipi(cpumask_t mask)
 103 {
 104         smp_ops.send_call_func_ipi(mask);
 105 }
 106
 107 void native_smp_prepare_boot_cpu(void);
 108 void native_smp_prepare_cpus(unsigned int max_cpus);
 109 void native_smp_cpus_done(unsigned int max_cpus);
 110 int native_cpu_up(unsigned int cpunum);
 111 void native_send_call_func_ipi(cpumask_t mask);
 112 void native_send_call_func_single_ipi(int cpu);
 113
 114 extern int __cpu_disable(void);
 115 extern void __cpu_die(unsigned int cpu);
 116
 117 void smp_store_cpu_info(int id);
 118 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 119
 120 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 121 static inline int num_booting_cpus(void)
 122 {
 123         return cpus_weight(cpu_callout_map);
 124 }
 125 #endif /* CONFIG_SMP */
 126
 127 #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
 128 extern void prefill_possible_map(void);
 129 #else
 130 static inline void prefill_possible_map(void)
 131 {
 132 }
 133 #endif
 134
 135 extern unsigned disabled_cpus __cpuinitdata;
 136
 137 #ifdef CONFIG_X86_32_SMP
 138 /*
 139  * This function is needed by all SMP systems. It must _always_ be valid
 140  * from the initial startup. We map APIC_BASE very early in page_setup(),
 141  * so this is correct in the x86 case.
 142  */
 143 DECLARE_PER_CPU(int, cpu_number);
 144 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 145 extern int safe_smp_processor_id(void);
 146
 147 #elif defined(CONFIG_X86_64_SMP)
 148 #define raw_smp_processor_id()  read_pda(cpunumber)
 149
 150 #define stack_smp_processor_id()                                        \
 151 ({                                                              \
 152         struct thread_info *ti;                                         \
 153         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 154         ti->cpu;                                                        \
 155 })
 156 #define safe_smp_processor_id()         smp_processor_id()
 157
 158 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
 159 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 160 #define safe_smp_processor_id()         0
 161 #define stack_smp_processor_id()        0
 162 #endif
 163
 164 #ifdef CONFIG_X86_LOCAL_APIC
 165
 166 static inline int logical_smp_processor_id(void)
 167 {
 168         /* we don't want to mark this access volatile - bad code generation */
 169         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 170 }
 171
 172 #ifndef CONFIG_X86_64
 173 static inline unsigned int read_apic_id(void)
 174 {
 175         return *(u32 *)(APIC_BASE + APIC_ID);
 176 }
 177 #else
 178 extern unsigned int read_apic_id(void);
 179 #endif
 180
 181
 182 # ifdef APIC_DEFINITION
 183 extern int hard_smp_processor_id(void);
 184 # else
 185 #  include <mach_apicdef.h>
 186 static inline int hard_smp_processor_id(void)
 187 {
 188         /* we don't want to mark this access volatile - bad code generation */
 189         return GET_APIC_ID(read_apic_id());
 190 }
 191 # endif /* APIC_DEFINITION */
 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_HOTPLUG_CPU
 202 extern void cpu_uninit(void);
 203 #endif
 204
 205 #endif /* __ASSEMBLY__ */
 206 #endif