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