include/asm-x86/smp_32.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 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  34 DECLARE_PER_CPU(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 __initdata x86_cpu_to_apicid_init[];
  43 extern void *x86_cpu_to_apicid_ptr;
  44 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
  45
  46 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
  47
  48 extern void set_cpu_sibling_map(int cpu);
  49
  50 #ifdef CONFIG_HOTPLUG_CPU
  51 extern void cpu_exit_clear(void);
  52 extern void cpu_uninit(void);
  53 extern void remove_siblinginfo(int cpu);
  54 #endif
  55
  56 struct smp_ops
  57 {
  58         void (*smp_prepare_boot_cpu)(void);
  59         void (*smp_prepare_cpus)(unsigned max_cpus);
  60         int (*cpu_up)(unsigned cpu);
  61         void (*smp_cpus_done)(unsigned max_cpus);
  62
  63         void (*smp_send_stop)(void);
  64         void (*smp_send_reschedule)(int cpu);
  65         int (*smp_call_function_mask)(cpumask_t mask,
  66                                       void (*func)(void *info), void *info,
  67                                       int wait);
  68 };
  69
  70 extern struct smp_ops smp_ops;
  71
  72 static inline void smp_prepare_boot_cpu(void)
  73 {
  74         smp_ops.smp_prepare_boot_cpu();
  75 }
  76 static inline void smp_prepare_cpus(unsigned int max_cpus)
  77 {
  78         smp_ops.smp_prepare_cpus(max_cpus);
  79 }
  80 static inline int __cpu_up(unsigned int cpu)
  81 {
  82         return smp_ops.cpu_up(cpu);
  83 }
  84 static inline void smp_cpus_done(unsigned int max_cpus)
  85 {
  86         smp_ops.smp_cpus_done(max_cpus);
  87 }
  88
  89 static inline void smp_send_stop(void)
  90 {
  91         smp_ops.smp_send_stop();
  92 }
  93 static inline void smp_send_reschedule(int cpu)
  94 {
  95         smp_ops.smp_send_reschedule(cpu);
  96 }
  97 extern int smp_call_function_mask(cpumask_t mask,
  98                                   void (*func) (void *info), void *info,
  99                                   int wait);
 100
 101 void native_smp_prepare_boot_cpu(void);
 102 void native_smp_prepare_cpus(unsigned int max_cpus);
 103 int native_cpu_up(unsigned int cpunum);
 104 void native_smp_cpus_done(unsigned int max_cpus);
 105
 106 #ifndef CONFIG_PARAVIRT
 107 #define startup_ipi_hook(phys_apicid, start_eip, start_esp)             \
 108 do { } while (0)
 109 #endif
 110
 111 /*
 112  * This function is needed by all SMP systems. It must _always_ be valid
 113  * from the initial startup. We map APIC_BASE very early in page_setup(),
 114  * so this is correct in the x86 case.
 115  */
 116 DECLARE_PER_CPU(int, cpu_number);
 117 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 118
 119 extern cpumask_t cpu_callout_map;
 120 extern cpumask_t cpu_callin_map;
 121 extern cpumask_t cpu_possible_map;
 122
 123 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 124 static inline int num_booting_cpus(void)
 125 {
 126         return cpus_weight(cpu_callout_map);
 127 }
 128
 129 extern int safe_smp_processor_id(void);
 130 extern int __cpu_disable(void);
 131 extern void __cpu_die(unsigned int cpu);
 132 extern unsigned int num_processors;
 133
 134 void __cpuinit smp_store_cpu_info(int id);
 135
 136 #endif /* !__ASSEMBLY__ */
 137
 138 #else /* CONFIG_SMP */
 139
 140 #define safe_smp_processor_id()         0
 141 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 142
 143 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 144
 145 #endif /* CONFIG_SMP */
 146
 147 #ifndef __ASSEMBLY__
 148
 149 #ifdef CONFIG_X86_LOCAL_APIC
 150
 151 #ifdef APIC_DEFINITION
 152 extern int hard_smp_processor_id(void);
 153 #else
 154 #include <mach_apicdef.h>
 155 static inline int hard_smp_processor_id(void)
 156 {
 157         /* we don't want to mark this access volatile - bad code generation */
 158         return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
 159 }
 160 #endif /* APIC_DEFINITION */
 161
 162 #else /* CONFIG_X86_LOCAL_APIC */
 163
 164 #ifndef CONFIG_SMP
 165 #define hard_smp_processor_id()         0
 166 #endif
 167
 168 #endif /* CONFIG_X86_LOCAL_APIC */
 169
 170 extern u8 apicid_2_node[];
 171
 172 #ifdef CONFIG_X86_LOCAL_APIC
 173 static __inline int logical_smp_processor_id(void)
 174 {
 175         /* we don't want to mark this access volatile - bad code generation */
 176         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 177 }
 178 #endif
 179 #endif
 180
 181 #endif