include/asm-x86/smp_64.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 #include <linux/cpumask.h>
   5 #include <linux/init.h>
   6
   7 /*
   8  * We need the APIC definitions automatically as part of 'smp.h'
   9  */
  10 #include <asm/apic.h>
  11 #include <asm/io_apic.h>
  12 #include <asm/mpspec.h>
  13 #include <asm/pda.h>
  14 #include <asm/thread_info.h>
  15
  16 extern cpumask_t cpu_callout_map;
  17 extern cpumask_t cpu_initialized;
  18
  19 extern int smp_num_siblings;
  20 extern unsigned int num_processors;
  21
  22 extern void smp_alloc_memory(void);
  23 extern void lock_ipi_call_lock(void);
  24 extern void unlock_ipi_call_lock(void);
  25
  26 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
  27                                   void *info, int wait);
  28
  29 extern u16 __initdata x86_cpu_to_apicid_init[];
  30 extern u16 __initdata x86_bios_cpu_apicid_init[];
  31 extern void *x86_cpu_to_apicid_early_ptr;
  32 extern void *x86_bios_cpu_apicid_early_ptr;
  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 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
  38 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
  39
  40 static inline int cpu_present_to_apicid(int mps_cpu)
  41 {
  42         if (cpu_present(mps_cpu))
  43                 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
  44         else
  45                 return BAD_APICID;
  46 }
  47
  48 #ifdef CONFIG_SMP
  49
  50 #define SMP_TRAMPOLINE_BASE 0x6000
  51
  52 extern int __cpu_disable(void);
  53 extern void __cpu_die(unsigned int cpu);
  54 extern void prefill_possible_map(void);
  55 extern unsigned __cpuinitdata disabled_cpus;
  56
  57 #define raw_smp_processor_id()  read_pda(cpunumber)
  58 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
  59
  60 #define stack_smp_processor_id()                                        \
  61         ({                                                              \
  62         struct thread_info *ti;                                         \
  63         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
  64         ti->cpu;                                                        \
  65 })
  66
  67 /*
  68  * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
  69  * scheduling and IPI sending and compresses data structures.
  70  */
  71 static inline int num_booting_cpus(void)
  72 {
  73         return cpus_weight(cpu_callout_map);
  74 }
  75
  76 extern void smp_send_reschedule(int cpu);
  77
  78 #else /* CONFIG_SMP */
  79
  80 extern unsigned int boot_cpu_id;
  81 #define cpu_physical_id(cpu)    boot_cpu_id
  82 #define stack_smp_processor_id() 0
  83
  84 #endif /* !CONFIG_SMP */
  85
  86 #define safe_smp_processor_id()         smp_processor_id()
  87
  88 static __inline int logical_smp_processor_id(void)
  89 {
  90         /* we don't want to mark this access volatile - bad code generation */
  91         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
  92 }
  93
  94 static inline int hard_smp_processor_id(void)
  95 {
  96         /* we don't want to mark this access volatile - bad code generation */
  97         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
  98 }
  99
 100 #endif
 101