include/asm-x86/smp_32.h

   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
  19 extern cpumask_t cpu_callout_map;
  20 extern cpumask_t cpu_callin_map;
  21
  22 extern int smp_num_siblings;
  23 extern unsigned int num_processors;
  24
  25 extern void smp_alloc_memory(void);
  26 extern void lock_ipi_call_lock(void);
  27 extern void unlock_ipi_call_lock(void);
  28
  29 extern void (*mtrr_hook) (void);
  30 extern void zap_low_mappings (void);
  31
  32 extern u8 __initdata x86_cpu_to_apicid_init[];
  33 extern void *x86_cpu_to_apicid_early_ptr;
  34
  35 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  36 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  37 DECLARE_PER_CPU(u8, cpu_llc_id);
  38 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
  39
  40 #ifdef CONFIG_HOTPLUG_CPU
  41 extern void cpu_exit_clear(void);
  42 extern void cpu_uninit(void);
  43 extern void remove_siblinginfo(int cpu);
  44 #endif
  45
  46 /* Globals due to paravirt */
  47 extern void set_cpu_sibling_map(int cpu);
  48
  49 struct 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
  64 extern struct smp_ops smp_ops;
  65
  66 static inline void smp_prepare_boot_cpu(void)
  67 {
  68         smp_ops.smp_prepare_boot_cpu();
  69 }
  70 static inline void smp_prepare_cpus(unsigned int max_cpus)
  71 {
  72         smp_ops.smp_prepare_cpus(max_cpus);
  73 }
  74 static inline int __cpu_up(unsigned int cpu)
  75 {
  76         return smp_ops.cpu_up(cpu);
  77 }
  78 static inline void smp_cpus_done(unsigned int max_cpus)
  79 {
  80         smp_ops.smp_cpus_done(max_cpus);
  81 }
  82
  83 static inline void smp_send_stop(void)
  84 {
  85         smp_ops.smp_send_stop();
  86 }
  87 static inline void smp_send_reschedule(int cpu)
  88 {
  89         smp_ops.smp_send_reschedule(cpu);
  90 }
  91 static 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
  98 void native_smp_prepare_boot_cpu(void);
  99 void native_smp_prepare_cpus(unsigned int max_cpus);
 100 int native_cpu_up(unsigned int cpunum);
 101 void 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
 107 extern int __cpu_disable(void);
 108 extern 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  */
 115 DECLARE_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
 120 extern int safe_smp_processor_id(void);
 121
 122 void __cpuinit smp_store_cpu_info(int id);
 123
 124 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 125 static 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
 139 static __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
 146 extern int hard_smp_processor_id(void);
 147 # else
 148 #  include <mach_apicdef.h>
 149 static 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