LXR linux/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#if defined(CONFIG_X86_LOCAL_APIC) && !defined(__ASSEMBLY__)
  14#include <asm/bitops.h>
  15#include <asm/mpspec.h>
  16#include <asm/apic.h>
  17#ifdef CONFIG_X86_IO_APIC
  18#include <asm/io_apic.h>
  19#endif
  20#endif
  21
  22#define BAD_APICID 0xFFu
  23#ifdef CONFIG_SMP
  24#ifndef __ASSEMBLY__
  25
  26/*
  27 * Private routines/data
  28 */
  29 
  30extern void smp_alloc_memory(void);
  31extern int pic_mode;
  32extern int smp_num_siblings;
  33extern cpumask_t cpu_sibling_map[];
  34extern cpumask_t cpu_core_map[];
  35
  36extern void (*mtrr_hook) (void);
  37extern void zap_low_mappings (void);
  38extern void lock_ipi_call_lock(void);
  39extern void unlock_ipi_call_lock(void);
  40
  41#define MAX_APICID 256
  42extern u8 x86_cpu_to_apicid[];
  43
  44#define cpu_physical_id(cpu)    x86_cpu_to_apicid[cpu]
  45
  46#ifdef CONFIG_HOTPLUG_CPU
  47extern void cpu_exit_clear(void);
  48extern void cpu_uninit(void);
  49#endif
  50
  51struct smp_ops
  52{
  53        void (*smp_prepare_boot_cpu)(void);
  54        void (*smp_prepare_cpus)(unsigned max_cpus);
  55        int (*cpu_up)(unsigned cpu);
  56        void (*smp_cpus_done)(unsigned max_cpus);
  57
  58        void (*smp_send_stop)(void);
  59        void (*smp_send_reschedule)(int cpu);
  60        int (*smp_call_function_mask)(cpumask_t mask,
  61                                      void (*func)(void *info), void *info,
  62                                      int wait);
  63};
  64
  65extern struct smp_ops smp_ops;
  66
  67static inline void smp_prepare_boot_cpu(void)
  68{
  69        smp_ops.smp_prepare_boot_cpu();
  70}
  71static inline void smp_prepare_cpus(unsigned int max_cpus)
  72{
  73        smp_ops.smp_prepare_cpus(max_cpus);
  74}
  75static inline int __cpu_up(unsigned int cpu)
  76{
  77        return smp_ops.cpu_up(cpu);
  78}
  79static inline void smp_cpus_done(unsigned int max_cpus)
  80{
  81        smp_ops.smp_cpus_done(max_cpus);
  82}
  83
  84static inline void smp_send_stop(void)
  85{
  86        smp_ops.smp_send_stop();
  87}
  88static inline void smp_send_reschedule(int cpu)
  89{
  90        smp_ops.smp_send_reschedule(cpu);
  91}
  92static inline int smp_call_function_mask(cpumask_t mask,
  93                                         void (*func) (void *info), void *info,
  94                                         int wait)
  95{
  96        return smp_ops.smp_call_function_mask(mask, func, info, wait);
  97}
  98
  99void native_smp_prepare_boot_cpu(void);
 100void native_smp_prepare_cpus(unsigned int max_cpus);
 101int native_cpu_up(unsigned int cpunum);
 102void native_smp_cpus_done(unsigned int max_cpus);
 103
 104#ifndef CONFIG_PARAVIRT
 105#define startup_ipi_hook(phys_apicid, start_eip, start_esp)             \
 106do { } while (0)
 107#endif
 108
 109/*
 110 * This function is needed by all SMP systems. It must _always_ be valid
 111 * from the initial startup. We map APIC_BASE very early in page_setup(),
 112 * so this is correct in the x86 case.
 113 */
 114DECLARE_PER_CPU(int, cpu_number);
 115#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 116
 117extern cpumask_t cpu_callout_map;
 118extern cpumask_t cpu_callin_map;
 119extern cpumask_t cpu_possible_map;
 120
 121/* We don't mark CPUs online until __cpu_up(), so we need another measure */
 122static inline int num_booting_cpus(void)
 123{
 124        return cpus_weight(cpu_callout_map);
 125}
 126
 127extern int safe_smp_processor_id(void);
 128extern int __cpu_disable(void);
 129extern void __cpu_die(unsigned int cpu);
 130extern unsigned int num_processors;
 131
 132#endif /* !__ASSEMBLY__ */
 133
 134#else /* CONFIG_SMP */
 135
 136#define safe_smp_processor_id()         0
 137#define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 138
 139#define NO_PROC_ID              0xFF            /* No processor magic marker */
 140
 141#endif /* CONFIG_SMP */
 142
 143#ifndef __ASSEMBLY__
 144
 145#ifdef CONFIG_X86_LOCAL_APIC
 146
 147#ifdef APIC_DEFINITION
 148extern int hard_smp_processor_id(void);
 149#else
 150#include <mach_apicdef.h>
 151static inline int hard_smp_processor_id(void)
 152{
 153        /* we don't want to mark this access volatile - bad code generation */
 154        return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
 155}
 156#endif /* APIC_DEFINITION */
 157
 158#else /* CONFIG_X86_LOCAL_APIC */
 159
 160#ifndef CONFIG_SMP
 161#define hard_smp_processor_id()         0
 162#endif
 163
 164#endif /* CONFIG_X86_LOCAL_APIC */
 165
 166extern u8 apicid_2_node[];
 167
 168#ifdef CONFIG_X86_LOCAL_APIC
 169static __inline int logical_smp_processor_id(void)
 170{
 171        /* we don't want to mark this access volatile - bad code generation */
 172        return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 173}
 174#endif
 175#endif
 176
 177#endif
 178