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 <linux/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 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 extern int smp_call_function_mask(cpumask_t mask,
  96                                   void (*func) (void *info), void *info,
  97                                   int wait);
  98
  99 void native_smp_prepare_boot_cpu(void);
 100 void native_smp_prepare_cpus(unsigned int max_cpus);
 101 int native_cpu_up(unsigned int cpunum);
 102 void native_smp_cpus_done(unsigned int max_cpus);
 103
 104 #ifndef CONFIG_PARAVIRT
 105 #define startup_ipi_hook(phys_apicid, start_eip, start_esp)             \
 106 do { } while (0)
 107 #endif
 108
 109 /*
 110  * This function is needed by all SMP systems. It must _always_ be valid
 111  * from the initial startup. We map APIC_BASE very early in page_setup(),
 112  * so this is correct in the x86 case.
 113  */
 114 DECLARE_PER_CPU(int, cpu_number);
 115 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 116
 117 extern cpumask_t cpu_callout_map;
 118 extern cpumask_t cpu_callin_map;
 119 extern cpumask_t cpu_possible_map;
 120
 121 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 122 static inline int num_booting_cpus(void)
 123 {
 124         return cpus_weight(cpu_callout_map);
 125 }
 126
 127 extern int safe_smp_processor_id(void);
 128 extern int __cpu_disable(void);
 129 extern void __cpu_die(unsigned int cpu);
 130 extern unsigned int num_processors;
 131
 132 void __cpuinit smp_store_cpu_info(int id);
 133
 134 #endif /* !__ASSEMBLY__ */
 135
 136 #else /* CONFIG_SMP */
 137
 138 #define safe_smp_processor_id()         0
 139 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 140
 141 #define NO_PROC_ID              0xFF            /* No processor magic marker */
 142
 143 #endif /* CONFIG_SMP */
 144
 145 #ifndef __ASSEMBLY__
 146
 147 #ifdef CONFIG_X86_LOCAL_APIC
 148
 149 #ifdef APIC_DEFINITION
 150 extern int hard_smp_processor_id(void);
 151 #else
 152 #include <mach_apicdef.h>
 153 static inline int hard_smp_processor_id(void)
 154 {
 155         /* we don't want to mark this access volatile - bad code generation */
 156         return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
 157 }
 158 #endif /* APIC_DEFINITION */
 159
 160 #else /* CONFIG_X86_LOCAL_APIC */
 161
 162 #ifndef CONFIG_SMP
 163 #define hard_smp_processor_id()         0
 164 #endif
 165
 166 #endif /* CONFIG_X86_LOCAL_APIC */
 167
 168 extern u8 apicid_2_node[];
 169
 170 #ifdef CONFIG_X86_LOCAL_APIC
 171 static __inline int logical_smp_processor_id(void)
 172 {
 173         /* we don't want to mark this access volatile - bad code generation */
 174         return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
 175 }
 176 #endif
 177 #endif
 178
 179 #endif