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 #include <asm/pda.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 #ifndef CONFIG_PARAVIRT
  56 #define startup_ipi_hook(phys_apicid, start_eip, start_esp)             \
  57 do { } while (0)
  58 #endif
  59
  60 /*
  61  * This function is needed by all SMP systems. It must _always_ be valid
  62  * from the initial startup. We map APIC_BASE very early in page_setup(),
  63  * so this is correct in the x86 case.
  64  */
  65 #define raw_smp_processor_id() (read_pda(cpu_number))
  66
  67 extern cpumask_t cpu_callout_map;
  68 extern cpumask_t cpu_callin_map;
  69 extern cpumask_t cpu_possible_map;
  70
  71 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
  72 static inline int num_booting_cpus(void)
  73 {
  74         return cpus_weight(cpu_callout_map);
  75 }
  76
  77 #ifdef CONFIG_X86_LOCAL_APIC
  78
  79 #ifdef APIC_DEFINITION
  80 extern int hard_smp_processor_id(void);
  81 #else
  82 #include <mach_apicdef.h>
  83 static inline int hard_smp_processor_id(void)
  84 {
  85         /* we don't want to mark this access volatile - bad code generation */
  86         return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
  87 }
  88 #endif
  89 #endif
  90
  91 extern int safe_smp_processor_id(void);
  92 extern int __cpu_disable(void);
  93 extern void __cpu_die(unsigned int cpu);
  94 extern unsigned int num_processors;
  95
  96 #endif /* !__ASSEMBLY__ */
  97
  98 #else /* CONFIG_SMP */
  99
 100 #define safe_smp_processor_id()         0
 101 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 102
 103 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 104
 105 #endif
 106
 107 #ifndef __ASSEMBLY__
 108
 109 extern u8 apicid_2_node[];
 110
 111 #ifdef CONFIG_X86_LOCAL_APIC
 112 static __inline int logical_smp_processor_id(void)
 113 {
 114         /* we don't want to mark this access volatile - bad code generation */
 115         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 116 }
 117 #endif
 118 #endif
 119
 120 #endif