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 #ifdef CONFIG_SMP
  42 static inline void smp_cpus_done(unsigned int max_cpus)
  43 {
  44         smp_ops.smp_cpus_done(max_cpus);
  45 }
  46
  47 static inline void smp_send_stop(void)
  48 {
  49         smp_ops.smp_send_stop();
  50 }
  51
  52 void native_smp_cpus_done(unsigned int max_cpus);
  53
  54 #ifndef CONFIG_PARAVIRT
  55 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
  56 #endif
  57
  58 extern int __cpu_disable(void);
  59 extern void __cpu_die(unsigned int cpu);
  60
  61 /*
  62  * This function is needed by all SMP systems. It must _always_ be valid
  63  * from the initial startup. We map APIC_BASE very early in page_setup(),
  64  * so this is correct in the x86 case.
  65  */
  66 DECLARE_PER_CPU(int, cpu_number);
  67 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
  68
  69 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
  70
  71 extern int safe_smp_processor_id(void);
  72
  73 void __cpuinit smp_store_cpu_info(int id);
  74
  75 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
  76 static inline int num_booting_cpus(void)
  77 {
  78         return cpus_weight(cpu_callout_map);
  79 }
  80
  81 #else /* CONFIG_SMP */
  82
  83 #define safe_smp_processor_id()         0
  84 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
  85
  86 #endif /* !CONFIG_SMP */
  87
  88 #ifdef CONFIG_X86_LOCAL_APIC
  89
  90 static __inline int logical_smp_processor_id(void)
  91 {
  92         /* we don't want to mark this access volatile - bad code generation */
  93         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
  94 }
  95
  96 # ifdef APIC_DEFINITION
  97 extern int hard_smp_processor_id(void);
  98 # else
  99 #  include <mach_apicdef.h>
 100 static inline int hard_smp_processor_id(void)
 101 {
 102         /* we don't want to mark this access volatile - bad code generation */
 103         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
 104 }
 105 # endif /* APIC_DEFINITION */
 106
 107 #else /* CONFIG_X86_LOCAL_APIC */
 108
 109 # ifndef CONFIG_SMP
 110 #  define hard_smp_processor_id()       0
 111 # endif
 112
 113 #endif /* CONFIG_X86_LOCAL_APIC */
 114
 115 #endif /* !ASSEMBLY */
 116 #endif