LXR linux-bk/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 
  34extern void smp_alloc_memory(void);
  35extern int pic_mode;
  36extern int smp_num_siblings;
  37extern cpumask_t cpu_sibling_map[];
  38
  39extern void smp_flush_tlb(void);
  40extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
  41extern void smp_invalidate_rcv(void);           /* Process an NMI */
  42extern void (*mtrr_hook) (void);
  43extern void zap_low_mappings (void);
  44
  45#define MAX_APICID 256
  46
  47/*
  48 * This function is needed by all SMP systems. It must _always_ be valid
  49 * from the initial startup. We map APIC_BASE very early in page_setup(),
  50 * so this is correct in the x86 case.
  51 */
  52#define smp_processor_id() (current_thread_info()->cpu)
  53
  54extern cpumask_t cpu_callout_map;
  55#define cpu_possible_map cpu_callout_map
  56
  57/* We don't mark CPUs online until __cpu_up(), so we need another measure */
  58static inline int num_booting_cpus(void)
  59{
  60        return cpus_weight(cpu_callout_map);
  61}
  62
  63extern void map_cpu_to_logical_apicid(void);
  64extern void unmap_cpu_to_logical_apicid(int cpu);
  65
  66#ifdef CONFIG_X86_LOCAL_APIC
  67
  68#ifdef APIC_DEFINITION
  69extern int hard_smp_processor_id(void);
  70#else
  71#include <mach_apicdef.h>
  72static inline int hard_smp_processor_id(void)
  73{
  74        /* we don't want to mark this access volatile - bad code generation */
  75        return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
  76}
  77#endif
  78
  79static __inline int logical_smp_processor_id(void)
  80{
  81        /* we don't want to mark this access volatile - bad code generation */
  82        return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
  83}
  84
  85#endif
  86#endif /* !__ASSEMBLY__ */
  87
  88#define NO_PROC_ID              0xFF            /* No processor magic marker */
  89
  90#endif
  91#endif
  92