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