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
  30 extern void smp_alloc_memory(void);
  31 extern int pic_mode;
  32 extern int smp_num_siblings;
  33 extern cpumask_t cpu_sibling_map[];
  34 extern cpumask_t cpu_core_map[];
  35
  36 extern void (*mtrr_hook) (void);
  37 extern void zap_low_mappings (void);
  38 extern void lock_ipi_call_lock(void);
  39 extern void unlock_ipi_call_lock(void);
  40
  41 #define MAX_APICID 256
  42 extern u8 x86_cpu_to_apicid[];
  43
  44 #define cpu_physical_id(cpu)    x86_cpu_to_apicid[cpu]
  45
  46 extern void set_cpu_sibling_map(int cpu);
  47
  48 #ifdef CONFIG_HOTPLUG_CPU
  49 extern void cpu_exit_clear(void);
  50 extern void cpu_uninit(void);
  51 extern void remove_siblinginfo(int cpu);
  52 #endif
  53
  54 struct smp_ops
  55 {
  56         void (*smp_prepare_boot_cpu)(void);
  57         void (*smp_prepare_cpus)(unsigned max_cpus);
  58         int (*cpu_up)(unsigned cpu);
  59         void (*smp_cpus_done)(unsigned max_cpus);
  60
  61         void (*smp_send_stop)(void);
  62         void (*smp_send_reschedule)(int cpu);
  63         int (*smp_call_function_mask)(cpumask_t mask,
  64                                       void (*func)(void *info), void *info,
  65                                       int wait);
  66 };
  67
  68 extern struct smp_ops smp_ops;
  69
  70 static inline void smp_prepare_boot_cpu(void)
  71 {
  72         smp_ops.smp_prepare_boot_cpu();
  73 }
  74 static inline void smp_prepare_cpus(unsigned int max_cpus)
  75 {
  76         smp_ops.smp_prepare_cpus(max_cpus);
  77 }
  78 static inline int __cpu_up(unsigned int cpu)
  79 {
  80         return smp_ops.cpu_up(cpu);
  81 }
  82 static inline void smp_cpus_done(unsigned int max_cpus)
  83 {
  84         smp_ops.smp_cpus_done(max_cpus);
  85 }
  86
  87 static inline void smp_send_stop(void)
  88 {
  89         smp_ops.smp_send_stop();
  90 }
  91 static inline void smp_send_reschedule(int cpu)
  92 {
  93         smp_ops.smp_send_reschedule(cpu);
  94 }
  95 static inline int smp_call_function_mask(cpumask_t mask,
  96                                          void (*func) (void *info), void *info,
  97                                          int wait)
  98 {
  99         return smp_ops.smp_call_function_mask(mask, func, info, wait);
 100 }
 101
 102 void native_smp_prepare_boot_cpu(void);
 103 void native_smp_prepare_cpus(unsigned int max_cpus);
 104 int native_cpu_up(unsigned int cpunum);
 105 void native_smp_cpus_done(unsigned int max_cpus);
 106
 107 #ifndef CONFIG_PARAVIRT
 108 #define startup_ipi_hook(phys_apicid, start_eip, start_esp)             \
 109 do { } while (0)
 110 #endif
 111
 112 /*
 113  * This function is needed by all SMP systems. It must _always_ be valid
 114  * from the initial startup. We map APIC_BASE very early in page_setup(),
 115  * so this is correct in the x86 case.
 116  */
 117 DECLARE_PER_CPU(int, cpu_number);
 118 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 119
 120 extern cpumask_t cpu_callout_map;
 121 extern cpumask_t cpu_callin_map;
 122 extern cpumask_t cpu_possible_map;
 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 extern int safe_smp_processor_id(void);
 131 extern int __cpu_disable(void);
 132 extern void __cpu_die(unsigned int cpu);
 133 extern unsigned int num_processors;
 134
 135 void __cpuinit smp_store_cpu_info(int id);
 136
 137 #endif /* !__ASSEMBLY__ */
 138
 139 #else /* CONFIG_SMP */
 140
 141 #define safe_smp_processor_id()         0
 142 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 143
 144 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 145
 146 #endif /* CONFIG_SMP */
 147
 148 #ifndef __ASSEMBLY__
 149
 150 #ifdef CONFIG_X86_LOCAL_APIC
 151
 152 #ifdef APIC_DEFINITION
 153 extern int hard_smp_processor_id(void);
 154 #else
 155 #include <mach_apicdef.h>
 156 static inline int hard_smp_processor_id(void)
 157 {
 158         /* we don't want to mark this access volatile - bad code generation */
 159         return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
 160 }
 161 #endif /* APIC_DEFINITION */
 162
 163 #else /* CONFIG_X86_LOCAL_APIC */
 164
 165 #ifndef CONFIG_SMP
 166 #define hard_smp_processor_id()         0
 167 #endif
 168
 169 #endif /* CONFIG_X86_LOCAL_APIC */
 170
 171 extern u8 apicid_2_node[];
 172
 173 #ifdef CONFIG_X86_LOCAL_APIC
 174 static __inline int logical_smp_processor_id(void)
 175 {
 176         /* we don't want to mark this access volatile - bad code generation */
 177         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 178 }
 179 #endif
 180 #endif
 181
 182 #endif