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_callin_map;
  20
  21 extern void (*mtrr_hook) (void);
  22 extern void zap_low_mappings (void);
  23
  24 extern u8 __initdata x86_cpu_to_apicid_init[];
  25 extern void *x86_cpu_to_apicid_early_ptr;
  26
  27 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  28 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  29 DECLARE_PER_CPU(u8, cpu_llc_id);
  30 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
  31
  32 #ifdef CONFIG_HOTPLUG_CPU
  33 extern void cpu_exit_clear(void);
  34 extern void cpu_uninit(void);
  35 extern void remove_siblinginfo(int cpu);
  36 #endif
  37
  38 /* Globals due to paravirt */
  39 extern void set_cpu_sibling_map(int cpu);
  40
  41 struct smp_ops
  42 {
  43         void (*smp_prepare_boot_cpu)(void);
  44         void (*smp_prepare_cpus)(unsigned max_cpus);
  45         int (*cpu_up)(unsigned cpu);
  46         void (*smp_cpus_done)(unsigned max_cpus);
  47
  48         void (*smp_send_stop)(void);
  49         void (*smp_send_reschedule)(int cpu);
  50         int (*smp_call_function_mask)(cpumask_t mask,
  51                                       void (*func)(void *info), void *info,
  52                                       int wait);
  53 };
  54
  55 #ifdef CONFIG_SMP
  56 extern struct smp_ops smp_ops;
  57
  58 static inline void smp_prepare_boot_cpu(void)
  59 {
  60         smp_ops.smp_prepare_boot_cpu();
  61 }
  62 static inline void smp_prepare_cpus(unsigned int max_cpus)
  63 {
  64         smp_ops.smp_prepare_cpus(max_cpus);
  65 }
  66 static inline int __cpu_up(unsigned int cpu)
  67 {
  68         return smp_ops.cpu_up(cpu);
  69 }
  70 static inline void smp_cpus_done(unsigned int max_cpus)
  71 {
  72         smp_ops.smp_cpus_done(max_cpus);
  73 }
  74
  75 static inline void smp_send_stop(void)
  76 {
  77         smp_ops.smp_send_stop();
  78 }
  79 static inline void smp_send_reschedule(int cpu)
  80 {
  81         smp_ops.smp_send_reschedule(cpu);
  82 }
  83 static inline int smp_call_function_mask(cpumask_t mask,
  84                                          void (*func) (void *info), void *info,
  85                                          int wait)
  86 {
  87         return smp_ops.smp_call_function_mask(mask, func, info, wait);
  88 }
  89
  90 void native_smp_prepare_boot_cpu(void);
  91 void native_smp_prepare_cpus(unsigned int max_cpus);
  92 int native_cpu_up(unsigned int cpunum);
  93 void native_smp_cpus_done(unsigned int max_cpus);
  94
  95 #ifndef CONFIG_PARAVIRT
  96 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  97 #endif
  98
  99 extern int __cpu_disable(void);
 100 extern void __cpu_die(unsigned int cpu);
 101
 102 /*
 103  * This function is needed by all SMP systems. It must _always_ be valid
 104  * from the initial startup. We map APIC_BASE very early in page_setup(),
 105  * so this is correct in the x86 case.
 106  */
 107 DECLARE_PER_CPU(int, cpu_number);
 108 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
 109
 110 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 111
 112 extern int safe_smp_processor_id(void);
 113
 114 void __cpuinit smp_store_cpu_info(int id);
 115
 116 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
 117 static inline int num_booting_cpus(void)
 118 {
 119         return cpus_weight(cpu_callout_map);
 120 }
 121
 122 #else /* CONFIG_SMP */
 123
 124 #define safe_smp_processor_id()         0
 125 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
 126
 127 #endif /* !CONFIG_SMP */
 128
 129 #ifdef CONFIG_X86_LOCAL_APIC
 130
 131 static __inline int logical_smp_processor_id(void)
 132 {
 133         /* we don't want to mark this access volatile - bad code generation */
 134         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
 135 }
 136
 137 # ifdef APIC_DEFINITION
 138 extern int hard_smp_processor_id(void);
 139 # else
 140 #  include <mach_apicdef.h>
 141 static inline int hard_smp_processor_id(void)
 142 {
 143         /* we don't want to mark this access volatile - bad code generation */
 144         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
 145 }
 146 # endif /* APIC_DEFINITION */
 147
 148 #else /* CONFIG_X86_LOCAL_APIC */
 149
 150 # ifndef CONFIG_SMP
 151 #  define hard_smp_processor_id()       0
 152 # endif
 153
 154 #endif /* CONFIG_X86_LOCAL_APIC */
 155
 156 #endif /* !ASSEMBLY */
 157 #endif