LXR linux/arch/x86/include/asm/smp.h

   1#ifndef _ASM_X86_SMP_H
   2#define _ASM_X86_SMP_H
   3#ifndef __ASSEMBLY__
   4#include <linux/cpumask.h>
   5#include <asm/percpu.h>
   6
   7/*
   8 * We need the APIC definitions automatically as part of 'smp.h'
   9 */
  10#ifdef CONFIG_X86_LOCAL_APIC
  11# include <asm/mpspec.h>
  12# include <asm/apic.h>
  13# ifdef CONFIG_X86_IO_APIC
  14#  include <asm/io_apic.h>
  15# endif
  16#endif
  17#include <asm/thread_info.h>
  18#include <asm/cpumask.h>
  19
  20extern int smp_num_siblings;
  21extern unsigned int num_processors;
  22
  23DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
  24DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
  25/* cpus sharing the last level cache: */
  26DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
  27DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
  28DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
  29
  30static inline struct cpumask *cpu_llc_shared_mask(int cpu)
  31{
  32        return per_cpu(cpu_llc_shared_map, cpu);
  33}
  34
  35DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
  36DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
  37DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
  38#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  39DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
  40#endif
  41
  42struct task_struct;
  43
  44struct smp_ops {
  45        void (*smp_prepare_boot_cpu)(void);
  46        void (*smp_prepare_cpus)(unsigned max_cpus);
  47        void (*smp_cpus_done)(unsigned max_cpus);
  48
  49        void (*stop_other_cpus)(int wait);
  50        void (*crash_stop_other_cpus)(void);
  51        void (*smp_send_reschedule)(int cpu);
  52
  53        int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
  54        int (*cpu_disable)(void);
  55        void (*cpu_die)(unsigned int cpu);
  56        void (*play_dead)(void);
  57
  58        void (*send_call_func_ipi)(const struct cpumask *mask);
  59        void (*send_call_func_single_ipi)(int cpu);
  60};
  61
  62/* Globals due to paravirt */
  63extern void set_cpu_sibling_map(int cpu);
  64
  65#ifdef CONFIG_SMP
  66extern struct smp_ops smp_ops;
  67
  68static inline void smp_send_stop(void)
  69{
  70        smp_ops.stop_other_cpus(0);
  71}
  72
  73static inline void stop_other_cpus(void)
  74{
  75        smp_ops.stop_other_cpus(1);
  76}
  77
  78static inline void smp_prepare_boot_cpu(void)
  79{
  80        smp_ops.smp_prepare_boot_cpu();
  81}
  82
  83static inline void smp_prepare_cpus(unsigned int max_cpus)
  84{
  85        smp_ops.smp_prepare_cpus(max_cpus);
  86}
  87
  88static inline void smp_cpus_done(unsigned int max_cpus)
  89{
  90        smp_ops.smp_cpus_done(max_cpus);
  91}
  92
  93static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
  94{
  95        return smp_ops.cpu_up(cpu, tidle);
  96}
  97
  98static inline int __cpu_disable(void)
  99{
 100        return smp_ops.cpu_disable();
 101}
 102
 103static inline void __cpu_die(unsigned int cpu)
 104{
 105        smp_ops.cpu_die(cpu);
 106}
 107
 108static inline void play_dead(void)
 109{
 110        smp_ops.play_dead();
 111}
 112
 113static inline void smp_send_reschedule(int cpu)
 114{
 115        smp_ops.smp_send_reschedule(cpu);
 116}
 117
 118static inline void arch_send_call_function_single_ipi(int cpu)
 119{
 120        smp_ops.send_call_func_single_ipi(cpu);
 121}
 122
 123static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 124{
 125        smp_ops.send_call_func_ipi(mask);
 126}
 127
 128void cpu_disable_common(void);
 129void native_smp_prepare_boot_cpu(void);
 130void native_smp_prepare_cpus(unsigned int max_cpus);
 131void native_smp_cpus_done(unsigned int max_cpus);
 132void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 133int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 134int native_cpu_disable(void);
 135int common_cpu_die(unsigned int cpu);
 136void native_cpu_die(unsigned int cpu);
 137void hlt_play_dead(void);
 138void native_play_dead(void);
 139void play_dead_common(void);
 140void wbinvd_on_cpu(int cpu);
 141int wbinvd_on_all_cpus(void);
 142
 143void native_send_call_func_ipi(const struct cpumask *mask);
 144void native_send_call_func_single_ipi(int cpu);
 145void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 146
 147void smp_store_boot_cpu_info(void);
 148void smp_store_cpu_info(int id);
 149#define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 150#define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
 151
 152/*
 153 * This function is needed by all SMP systems. It must _always_ be valid
 154 * from the initial startup. We map APIC_BASE very early in page_setup(),
 155 * so this is correct in the x86 case.
 156 */
 157#define raw_smp_processor_id() (this_cpu_read(cpu_number))
 158
 159#ifdef CONFIG_X86_32
 160extern int safe_smp_processor_id(void);
 161#else
 162# define safe_smp_processor_id()        smp_processor_id()
 163#endif
 164
 165#else /* !CONFIG_SMP */
 166#define wbinvd_on_cpu(cpu)     wbinvd()
 167static inline int wbinvd_on_all_cpus(void)
 168{
 169        wbinvd();
 170        return 0;
 171}
 172#define smp_num_siblings        1
 173#endif /* CONFIG_SMP */
 174
 175extern unsigned disabled_cpus;
 176
 177#ifdef CONFIG_X86_LOCAL_APIC
 178
 179#ifndef CONFIG_X86_64
 180static inline int logical_smp_processor_id(void)
 181{
 182        /* we don't want to mark this access volatile - bad code generation */
 183        return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
 184}
 185
 186#endif
 187
 188extern int hard_smp_processor_id(void);
 189
 190#else /* CONFIG_X86_LOCAL_APIC */
 191#define hard_smp_processor_id() 0
 192#endif /* CONFIG_X86_LOCAL_APIC */
 193
 194#ifdef CONFIG_DEBUG_NMI_SELFTEST
 195extern void nmi_selftest(void);
 196#else
 197#define nmi_selftest() do { } while (0)
 198#endif
 199
 200#endif /* __ASSEMBLY__ */
 201#endif /* _ASM_X86_SMP_H */
 202