LXR linux/include/asm-x86/smp

   1#ifndef __ASM_SMP_H
   2#define __ASM_SMP_H
   3
   4#ifndef __ASSEMBLY__
   5#include <linux/cpumask.h>
   6#include <linux/init.h>
   7
   8/*
   9 * We need the APIC definitions automatically as part of 'smp.h'
  10 */
  11#ifdef CONFIG_X86_LOCAL_APIC
  12# include <asm/mpspec.h>
  13# include <asm/apic.h>
  14# ifdef CONFIG_X86_IO_APIC
  15#  include <asm/io_apic.h>
  16# endif
  17#endif
  18
  19extern cpumask_t cpu_callout_map;
  20extern cpumask_t cpu_callin_map;
  21
  22extern int smp_num_siblings;
  23extern unsigned int num_processors;
  24
  25extern void smp_alloc_memory(void);
  26extern void lock_ipi_call_lock(void);
  27extern void unlock_ipi_call_lock(void);
  28
  29extern void (*mtrr_hook) (void);
  30extern void zap_low_mappings (void);
  31
  32extern u8 __initdata x86_cpu_to_apicid_init[];
  33extern void *x86_cpu_to_apicid_early_ptr;
  34
  35DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  36DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  37DECLARE_PER_CPU(u8, cpu_llc_id);
  38DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
  39
  40#ifdef CONFIG_HOTPLUG_CPU
  41extern void cpu_exit_clear(void);
  42extern void cpu_uninit(void);
  43extern void remove_siblinginfo(int cpu);
  44#endif
  45
  46/* Globals due to paravirt */
  47extern void set_cpu_sibling_map(int cpu);
  48
  49struct smp_ops
  50{
  51        void (*smp_prepare_boot_cpu)(void);
  52        void (*smp_prepare_cpus)(unsigned max_cpus);
  53        int (*cpu_up)(unsigned cpu);
  54        void (*smp_cpus_done)(unsigned max_cpus);
  55
  56        void (*smp_send_stop)(void);
  57        void (*smp_send_reschedule)(int cpu);
  58        int (*smp_call_function_mask)(cpumask_t mask,
  59                                      void (*func)(void *info), void *info,
  60                                      int wait);
  61};
  62
  63#ifdef CONFIG_SMP
  64extern struct smp_ops smp_ops;
  65
  66static inline void smp_prepare_boot_cpu(void)
  67{
  68        smp_ops.smp_prepare_boot_cpu();
  69}
  70static inline void smp_prepare_cpus(unsigned int max_cpus)
  71{
  72        smp_ops.smp_prepare_cpus(max_cpus);
  73}
  74static inline int __cpu_up(unsigned int cpu)
  75{
  76        return smp_ops.cpu_up(cpu);
  77}
  78static inline void smp_cpus_done(unsigned int max_cpus)
  79{
  80        smp_ops.smp_cpus_done(max_cpus);
  81}
  82
  83static inline void smp_send_stop(void)
  84{
  85        smp_ops.smp_send_stop();
  86}
  87static inline void smp_send_reschedule(int cpu)
  88{
  89        smp_ops.smp_send_reschedule(cpu);
  90}
  91static inline int smp_call_function_mask(cpumask_t mask,
  92                                         void (*func) (void *info), void *info,
  93                                         int wait)
  94{
  95        return smp_ops.smp_call_function_mask(mask, func, info, wait);
  96}
  97
  98void native_smp_prepare_boot_cpu(void);
  99void native_smp_prepare_cpus(unsigned int max_cpus);
 100int native_cpu_up(unsigned int cpunum);
 101void native_smp_cpus_done(unsigned int max_cpus);
 102
 103#ifndef CONFIG_PARAVIRT
 104#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
 105#endif
 106
 107extern int __cpu_disable(void);
 108extern void __cpu_die(unsigned int cpu);
 109
 110/*
 111 * This function is needed by all SMP systems. It must _always_ be valid
 112 * from the initial startup. We map APIC_BASE very early in page_setup(),
 113 * so this is correct in the x86 case.
 114 */
 115DECLARE_PER_CPU(int, cpu_number);
 116#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 117
 118#define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 119
 120extern int safe_smp_processor_id(void);
 121
 122void __cpuinit smp_store_cpu_info(int id);
 123
 124/* We don't mark CPUs online until __cpu_up(), so we need another measure */
 125static inline int num_booting_cpus(void)
 126{
 127        return cpus_weight(cpu_callout_map);
 128}
 129
 130#else /* CONFIG_SMP */
 131
 132#define safe_smp_processor_id()         0
 133#define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 134
 135#endif /* !CONFIG_SMP */
 136
 137#ifdef CONFIG_X86_LOCAL_APIC
 138
 139static __inline int logical_smp_processor_id(void)
 140{
 141        /* we don't want to mark this access volatile - bad code generation */
 142        return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 143}
 144
 145# ifdef APIC_DEFINITION
 146extern int hard_smp_processor_id(void);
 147# else
 148#  include <mach_apicdef.h>
 149static inline int hard_smp_processor_id(void)
 150{
 151        /* we don't want to mark this access volatile - bad code generation */
 152        return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
 153}
 154# endif /* APIC_DEFINITION */
 155
 156#else /* CONFIG_X86_LOCAL_APIC */
 157
 158# ifndef CONFIG_SMP
 159#  define hard_smp_processor_id()       0
 160# endif
 161
 162#endif /* CONFIG_X86_LOCAL_APIC */
 163
 164#endif /* !ASSEMBLY */
 165#endif
 166