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
  39 extern void smp_flush_tlb(void);
  40 extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
  41 extern void smp_invalidate_rcv(void);           /* Process an NMI */
  42 extern void (*mtrr_hook) (void);
  43 extern void zap_low_mappings (void);
  44
  45 #define MAX_APICID 256
  46 extern u8 x86_cpu_to_apicid[];
  47
  48 /*
  49  * This function is needed by all SMP systems. It must _always_ be valid
  50  * from the initial startup. We map APIC_BASE very early in page_setup(),
  51  * so this is correct in the x86 case.
  52  */
  53 #define __smp_processor_id() (current_thread_info()->cpu)
  54
  55 extern cpumask_t cpu_callout_map;
  56 extern cpumask_t cpu_callin_map;
  57 #define cpu_possible_map cpu_callout_map
  58
  59 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
  60 static inline int num_booting_cpus(void)
  61 {
  62         return cpus_weight(cpu_callout_map);
  63 }
  64
  65 #ifdef CONFIG_X86_LOCAL_APIC
  66
  67 #ifdef APIC_DEFINITION
  68 extern int hard_smp_processor_id(void);
  69 #else
  70 #include <mach_apicdef.h>
  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 long *)(APIC_BASE+APIC_ID));
  75 }
  76 #endif
  77
  78 static __inline int logical_smp_processor_id(void)
  79 {
  80         /* we don't want to mark this access volatile - bad code generation */
  81         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
  82 }
  83
  84 #endif
  85 #endif /* !__ASSEMBLY__ */
  86
  87 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  88
  89 #endif
  90 #endif