include/asm-x86_64/smp.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 /*
   5  * We need the APIC definitions automatically as part of 'smp.h'
   6  */
   7 #include <linux/threads.h>
   8 #include <linux/cpumask.h>
   9 #include <linux/bitops.h>
  10 #include <linux/init.h>
  11 extern int disable_apic;
  12
  13 #include <asm/fixmap.h>
  14 #include <asm/mpspec.h>
  15 #include <asm/io_apic.h>
  16 #include <asm/apic.h>
  17 #include <asm/thread_info.h>
  18
  19 #ifdef CONFIG_SMP
  20
  21 #include <asm/pda.h>
  22
  23 struct pt_regs;
  24
  25 extern cpumask_t cpu_present_mask;
  26 extern cpumask_t cpu_possible_map;
  27 extern cpumask_t cpu_online_map;
  28 extern cpumask_t cpu_callout_map;
  29 extern cpumask_t cpu_initialized;
  30
  31 /*
  32  * Private routines/data
  33  */
  34
  35 extern void smp_alloc_memory(void);
  36 extern volatile unsigned long smp_invalidate_needed;
  37 extern void lock_ipi_call_lock(void);
  38 extern void unlock_ipi_call_lock(void);
  39 extern int smp_num_siblings;
  40 extern void smp_send_reschedule(int cpu);
  41 void smp_stop_cpu(void);
  42
  43 extern cpumask_t cpu_sibling_map[NR_CPUS];
  44 extern cpumask_t cpu_core_map[NR_CPUS];
  45 extern u8 cpu_llc_id[NR_CPUS];
  46
  47 #define SMP_TRAMPOLINE_BASE 0x6000
  48
  49 /*
  50  * On x86 all CPUs are mapped 1:1 to the APIC space.
  51  * This simplifies scheduling and IPI sending and
  52  * compresses data structures.
  53  */
  54
  55 static inline int num_booting_cpus(void)
  56 {
  57         return cpus_weight(cpu_callout_map);
  58 }
  59
  60 #define raw_smp_processor_id() read_pda(cpunumber)
  61
  62 static inline int hard_smp_processor_id(void)
  63 {
  64         /* we don't want to mark this access volatile - bad code generation */
  65         return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
  66 }
  67
  68 extern int __cpu_disable(void);
  69 extern void __cpu_die(unsigned int cpu);
  70 extern void prefill_possible_map(void);
  71 extern unsigned num_processors;
  72 extern unsigned __cpuinitdata disabled_cpus;
  73
  74 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  75
  76 #endif
  77
  78 /*
  79  * Some lowlevel functions might want to know about
  80  * the real APIC ID <-> CPU # mapping.
  81  */
  82 extern u8 x86_cpu_to_apicid[NR_CPUS];   /* physical ID */
  83 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
  84 extern u8 bios_cpu_apicid[];
  85
  86 static inline int cpu_present_to_apicid(int mps_cpu)
  87 {
  88         if (mps_cpu < NR_CPUS)
  89                 return (int)bios_cpu_apicid[mps_cpu];
  90         else
  91                 return BAD_APICID;
  92 }
  93
  94 #ifndef CONFIG_SMP
  95 #define stack_smp_processor_id() 0
  96 #define cpu_logical_map(x) (x)
  97 #else
  98 #include <asm/thread_info.h>
  99 #define stack_smp_processor_id() \
 100 ({                                                              \
 101         struct thread_info *ti;                                 \
 102         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 103         ti->cpu;                                                \
 104 })
 105 #endif
 106
 107 static __inline int logical_smp_processor_id(void)
 108 {
 109         /* we don't want to mark this access volatile - bad code generation */
 110         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 111 }
 112
 113 #ifdef CONFIG_SMP
 114 #define cpu_physical_id(cpu)            x86_cpu_to_apicid[cpu]
 115 #else
 116 #define cpu_physical_id(cpu)            boot_cpu_id
 117 #endif /* !CONFIG_SMP */
 118 #endif
 119