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 extern int disable_apic;
  11
  12 #include <asm/fixmap.h>
  13 #include <asm/mpspec.h>
  14 #include <asm/io_apic.h>
  15 #include <asm/apic.h>
  16 #include <asm/thread_info.h>
  17
  18 #ifdef CONFIG_SMP
  19
  20 #include <asm/pda.h>
  21
  22 struct pt_regs;
  23
  24 extern cpumask_t cpu_present_mask;
  25 extern cpumask_t cpu_possible_map;
  26 extern cpumask_t cpu_online_map;
  27 extern cpumask_t cpu_callout_map;
  28 extern cpumask_t cpu_initialized;
  29
  30 /*
  31  * Private routines/data
  32  */
  33
  34 extern void smp_alloc_memory(void);
  35 extern volatile unsigned long smp_invalidate_needed;
  36 extern void lock_ipi_call_lock(void);
  37 extern void unlock_ipi_call_lock(void);
  38 extern int smp_num_siblings;
  39 extern void smp_send_reschedule(int cpu);
  40 void smp_stop_cpu(void);
  41
  42 extern cpumask_t cpu_sibling_map[NR_CPUS];
  43 extern cpumask_t cpu_core_map[NR_CPUS];
  44 extern u8 cpu_llc_id[NR_CPUS];
  45
  46 #define SMP_TRAMPOLINE_BASE 0x6000
  47
  48 /*
  49  * On x86 all CPUs are mapped 1:1 to the APIC space.
  50  * This simplifies scheduling and IPI sending and
  51  * compresses data structures.
  52  */
  53
  54 static inline int num_booting_cpus(void)
  55 {
  56         return cpus_weight(cpu_callout_map);
  57 }
  58
  59 #define raw_smp_processor_id() read_pda(cpunumber)
  60
  61 static inline int hard_smp_processor_id(void)
  62 {
  63         /* we don't want to mark this access volatile - bad code generation */
  64         return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
  65 }
  66
  67 extern int __cpu_disable(void);
  68 extern void __cpu_die(unsigned int cpu);
  69 extern void prefill_possible_map(void);
  70 extern unsigned num_processors;
  71 extern unsigned disabled_cpus;
  72
  73 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  74
  75 #endif
  76
  77 /*
  78  * Some lowlevel functions might want to know about
  79  * the real APIC ID <-> CPU # mapping.
  80  */
  81 extern u8 x86_cpu_to_apicid[NR_CPUS];   /* physical ID */
  82 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
  83 extern u8 bios_cpu_apicid[];
  84
  85 static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
  86 {
  87         return cpus_addr(cpumask)[0];
  88 }
  89
  90 static inline int cpu_present_to_apicid(int mps_cpu)
  91 {
  92         if (mps_cpu < NR_CPUS)
  93                 return (int)bios_cpu_apicid[mps_cpu];
  94         else
  95                 return BAD_APICID;
  96 }
  97
  98 #ifndef CONFIG_SMP
  99 #define stack_smp_processor_id() 0
 100 #define cpu_logical_map(x) (x)
 101 #else
 102 #include <asm/thread_info.h>
 103 #define stack_smp_processor_id() \
 104 ({                                                              \
 105         struct thread_info *ti;                                 \
 106         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 107         ti->cpu;                                                \
 108 })
 109 #endif
 110
 111 static __inline int logical_smp_processor_id(void)
 112 {
 113         /* we don't want to mark this access volatile - bad code generation */
 114         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 115 }
 116
 117 #ifdef CONFIG_SMP
 118 #define cpu_physical_id(cpu)            x86_cpu_to_apicid[cpu]
 119 #else
 120 #define cpu_physical_id(cpu)            boot_cpu_id
 121 static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
 122                                 void *info, int retry, int wait)
 123 {
 124         /* Disable interrupts here? */
 125         func(info);
 126         return 0;
 127 }
 128 #endif /* !CONFIG_SMP */
 129 #endif
 130