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/threads.h>
   9 #include <linux/cpumask.h>
  10 #include <linux/bitops.h>
  11 extern int disable_apic;
  12 #endif
  13
  14 #ifdef CONFIG_X86_LOCAL_APIC
  15 #ifndef __ASSEMBLY__
  16 #include <asm/fixmap.h>
  17 #include <asm/mpspec.h>
  18 #ifdef CONFIG_X86_IO_APIC
  19 #include <asm/io_apic.h>
  20 #endif
  21 #include <asm/apic.h>
  22 #include <asm/thread_info.h>
  23 #endif
  24 #endif
  25
  26 #ifdef CONFIG_SMP
  27 #ifndef ASSEMBLY
  28
  29 #include <asm/pda.h>
  30
  31 struct pt_regs;
  32
  33 extern cpumask_t cpu_present_mask;
  34 extern cpumask_t cpu_possible_map;
  35 extern cpumask_t cpu_online_map;
  36 extern cpumask_t cpu_callout_map;
  37 extern cpumask_t cpu_initialized;
  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 void smp_stop_cpu(void);
  51
  52 extern cpumask_t cpu_sibling_map[NR_CPUS];
  53 extern cpumask_t cpu_core_map[NR_CPUS];
  54 extern u8 cpu_llc_id[NR_CPUS];
  55
  56 #define SMP_TRAMPOLINE_BASE 0x6000
  57
  58 /*
  59  * On x86 all CPUs are mapped 1:1 to the APIC space.
  60  * This simplifies scheduling and IPI sending and
  61  * compresses data structures.
  62  */
  63
  64 static inline int num_booting_cpus(void)
  65 {
  66         return cpus_weight(cpu_callout_map);
  67 }
  68
  69 #define raw_smp_processor_id() read_pda(cpunumber)
  70
  71 static inline int hard_smp_processor_id(void)
  72 {
  73         /* we don't want to mark this access volatile - bad code generation */
  74         return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
  75 }
  76
  77 extern int safe_smp_processor_id(void);
  78 extern int __cpu_disable(void);
  79 extern void __cpu_die(unsigned int cpu);
  80 extern void prefill_possible_map(void);
  81 extern unsigned num_processors;
  82 extern unsigned disabled_cpus;
  83
  84 #endif /* !ASSEMBLY */
  85
  86 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  87
  88 #endif
  89
  90 #ifndef ASSEMBLY
  91 /*
  92  * Some lowlevel functions might want to know about
  93  * the real APIC ID <-> CPU # mapping.
  94  */
  95 extern u8 x86_cpu_to_apicid[NR_CPUS];   /* physical ID */
  96 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
  97 extern u8 bios_cpu_apicid[];
  98
  99 static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
 100 {
 101         return cpus_addr(cpumask)[0];
 102 }
 103
 104 static inline int cpu_present_to_apicid(int mps_cpu)
 105 {
 106         if (mps_cpu < NR_CPUS)
 107                 return (int)bios_cpu_apicid[mps_cpu];
 108         else
 109                 return BAD_APICID;
 110 }
 111
 112 #endif /* !ASSEMBLY */
 113
 114 #ifndef CONFIG_SMP
 115 #define stack_smp_processor_id() 0
 116 #define safe_smp_processor_id() 0
 117 #define cpu_logical_map(x) (x)
 118 #else
 119 #include <asm/thread_info.h>
 120 #define stack_smp_processor_id() \
 121 ({                                                              \
 122         struct thread_info *ti;                                 \
 123         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
 124         ti->cpu;                                                \
 125 })
 126 #endif
 127
 128 #ifndef __ASSEMBLY__
 129 static __inline int logical_smp_processor_id(void)
 130 {
 131         /* we don't want to mark this access volatile - bad code generation */
 132         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 133 }
 134 #endif
 135
 136 #ifdef CONFIG_SMP
 137 #define cpu_physical_id(cpu)            x86_cpu_to_apicid[cpu]
 138 #else
 139 #define cpu_physical_id(cpu)            boot_cpu_id
 140 #endif
 141
 142 #endif
 143