include/asm-i386/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/kernel.h>
   9 #include <linux/threads.h>
  10 #include <linux/cpumask.h>
  11 #endif
  12
  13 #ifdef CONFIG_X86_LOCAL_APIC
  14 #ifndef __ASSEMBLY__
  15 #include <asm/fixmap.h>
  16 #include <asm/bitops.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 #endif
  23 #endif
  24
  25 #define BAD_APICID 0xFFu
  26 #ifdef CONFIG_SMP
  27 #ifndef __ASSEMBLY__
  28
  29 /*
  30  * Private routines/data
  31  */
  32
  33 extern void smp_alloc_memory(void);
  34 extern int pic_mode;
  35 extern int smp_num_siblings;
  36 extern cpumask_t cpu_sibling_map[];
  37 extern cpumask_t cpu_core_map[];
  38
  39 extern void (*mtrr_hook) (void);
  40 extern void zap_low_mappings (void);
  41 extern void lock_ipi_call_lock(void);
  42 extern void unlock_ipi_call_lock(void);
  43
  44 #define MAX_APICID 256
  45 extern u8 x86_cpu_to_apicid[];
  46
  47 #define cpu_physical_id(cpu)    x86_cpu_to_apicid[cpu]
  48
  49 #ifdef CONFIG_HOTPLUG_CPU
  50 extern void cpu_exit_clear(void);
  51 extern void cpu_uninit(void);
  52 #endif
  53
  54 /*
  55  * This function is needed by all SMP systems. It must _always_ be valid
  56  * from the initial startup. We map APIC_BASE very early in page_setup(),
  57  * so this is correct in the x86 case.
  58  */
  59 #define raw_smp_processor_id() (current_thread_info()->cpu)
  60
  61 extern cpumask_t cpu_callout_map;
  62 extern cpumask_t cpu_callin_map;
  63 extern cpumask_t cpu_possible_map;
  64
  65 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
  66 static inline int num_booting_cpus(void)
  67 {
  68         return cpus_weight(cpu_callout_map);
  69 }
  70
  71 #ifdef CONFIG_X86_LOCAL_APIC
  72
  73 #ifdef APIC_DEFINITION
  74 extern int hard_smp_processor_id(void);
  75 #else
  76 #include <mach_apicdef.h>
  77 static inline int hard_smp_processor_id(void)
  78 {
  79         /* we don't want to mark this access volatile - bad code generation */
  80         return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
  81 }
  82 #endif
  83 #endif
  84
  85 extern int safe_smp_processor_id(void);
  86 extern int __cpu_disable(void);
  87 extern void __cpu_die(unsigned int cpu);
  88 extern unsigned int num_processors;
  89
  90 #endif /* !__ASSEMBLY__ */
  91
  92 #else /* CONFIG_SMP */
  93
  94 #define safe_smp_processor_id()         0
  95 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
  96
  97 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  98
  99 #endif
 100
 101 #ifndef __ASSEMBLY__
 102
 103 extern u8 apicid_2_node[];
 104
 105 #ifdef CONFIG_X86_LOCAL_APIC
 106 static __inline int logical_smp_processor_id(void)
 107 {
 108         /* we don't want to mark this access volatile - bad code generation */
 109         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 110 }
 111 #endif
 112 #endif
 113
 114 #endif