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 #ifndef __ASSEMBLY__
   8 #include <linux/config.h>
   9 #include <linux/threads.h>
  10 #include <linux/cpumask.h>
  11 #include <linux/bitops.h>
  12 extern int disable_apic;
  13 #endif
  14
  15 #ifdef CONFIG_X86_LOCAL_APIC
  16 #ifndef __ASSEMBLY__
  17 #include <asm/fixmap.h>
  18 #include <asm/mpspec.h>
  19 #ifdef CONFIG_X86_IO_APIC
  20 #include <asm/io_apic.h>
  21 #endif
  22 #include <asm/apic.h>
  23 #include <asm/thread_info.h>
  24 #endif
  25 #endif
  26
  27 #ifdef CONFIG_SMP
  28 #ifndef ASSEMBLY
  29
  30 #include <asm/pda.h>
  31
  32 struct pt_regs;
  33
  34 extern cpumask_t cpu_present_mask;
  35 extern cpumask_t cpu_possible_map;
  36 extern cpumask_t cpu_online_map;
  37 extern cpumask_t cpu_callout_map;
  38
  39 /*
  40  * Private routines/data
  41  */
  42
  43 extern void smp_alloc_memory(void);
  44 extern volatile unsigned long smp_invalidate_needed;
  45 extern int pic_mode;
  46 extern void lock_ipi_call_lock(void);
  47 extern void unlock_ipi_call_lock(void);
  48 extern int smp_num_siblings;
  49 extern void smp_send_reschedule(int cpu);
  50 extern void zap_low_mappings(void);
  51 void smp_stop_cpu(void);
  52 extern int smp_call_function_single(int cpuid, void (*func) (void *info),
  53                                 void *info, int retry, int wait);
  54
  55 extern cpumask_t cpu_sibling_map[NR_CPUS];
  56 extern cpumask_t cpu_core_map[NR_CPUS];
  57 extern u8 phys_proc_id[NR_CPUS];
  58 extern u8 cpu_core_id[NR_CPUS];
  59
  60 #define SMP_TRAMPOLINE_BASE 0x6000
  61
  62 /*
  63  * On x86 all CPUs are mapped 1:1 to the APIC space.
  64  * This simplifies scheduling and IPI sending and
  65  * compresses data structures.
  66  */
  67
  68 static inline int num_booting_cpus(void)
  69 {
  70         return cpus_weight(cpu_callout_map);
  71 }
  72
  73 #define raw_smp_processor_id() read_pda(cpunumber)
  74
  75 static inline int hard_smp_processor_id(void)
  76 {
  77         /* we don't want to mark this access volatile - bad code generation */
  78         return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
  79 }
  80
  81 extern int safe_smp_processor_id(void);
  82 extern int __cpu_disable(void);
  83 extern void __cpu_die(unsigned int cpu);
  84 extern void prefill_possible_map(void);
  85
  86 #endif /* !ASSEMBLY */
  87
  88 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  89
  90 #endif
  91
  92 #ifndef ASSEMBLY
  93 /*
  94  * Some lowlevel functions might want to know about
  95  * the real APIC ID <-> CPU # mapping.
  96  */
  97 extern u8 x86_cpu_to_apicid[NR_CPUS];   /* physical ID */
  98 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
  99 extern u8 bios_cpu_apicid[];
 100
 101 static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
 102 {
 103         return cpus_addr(cpumask)[0];
 104 }
 105
 106 static inline int cpu_present_to_apicid(int mps_cpu)
 107 {
 108         if (mps_cpu < NR_CPUS)
 109                 return (int)bios_cpu_apicid[mps_cpu];
 110         else
 111                 return BAD_APICID;
 112 }
 113
 114 #endif /* !ASSEMBLY */
 115
 116 #ifndef CONFIG_SMP
 117 #define stack_smp_processor_id() 0
 118 #define safe_smp_processor_id() 0
 119 #define cpu_logical_map(x) (x)
 120 #else
 121 #include <asm/thread_info.h>
 122 #define stack_smp_processor_id() \
 123 ({                                                              \
 124         struct thread_info *ti;                                 \
 125         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 126         ti->cpu;                                                \
 127 })
 128 #endif
 129
 130 #ifndef __ASSEMBLY__
 131 static __inline int logical_smp_processor_id(void)
 132 {
 133         /* we don't want to mark this access volatile - bad code generation */
 134         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 135 }
 136 #endif
 137
 138 #endif
 139