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 u16 __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(u16, cpu_llc_id);
  30 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
  31
  32 #ifdef CONFIG_SMP
  33 /*
  34  * This function is needed by all SMP systems. It must _always_ be valid
  35  * from the initial startup. We map APIC_BASE very early in page_setup(),
  36  * so this is correct in the x86 case.
  37  */
  38 DECLARE_PER_CPU(int, cpu_number);
  39 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
  40
  41 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
  42
  43 extern int safe_smp_processor_id(void);
  44
  45 void __cpuinit smp_store_cpu_info(int id);
  46
  47 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
  48 static inline int num_booting_cpus(void)
  49 {
  50         return cpus_weight(cpu_callout_map);
  51 }
  52
  53 #else /* CONFIG_SMP */
  54
  55 #define safe_smp_processor_id()         0
  56 #define cpu_physical_id(cpu)            boot_cpu_physical_apicid
  57
  58 #endif /* !CONFIG_SMP */
  59
  60 #ifdef CONFIG_X86_LOCAL_APIC
  61
  62 static __inline int logical_smp_processor_id(void)
  63 {
  64         /* we don't want to mark this access volatile - bad code generation */
  65         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
  66 }
  67
  68 # ifdef APIC_DEFINITION
  69 extern int hard_smp_processor_id(void);
  70 # else
  71 #  include <mach_apicdef.h>
  72 static inline int hard_smp_processor_id(void)
  73 {
  74         /* we don't want to mark this access volatile - bad code generation */
  75         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
  76 }
  77 # endif /* APIC_DEFINITION */
  78
  79 #else /* CONFIG_X86_LOCAL_APIC */
  80
  81 # ifndef CONFIG_SMP
  82 #  define hard_smp_processor_id()       0
  83 # endif
  84
  85 #endif /* CONFIG_X86_LOCAL_APIC */
  86
  87 #endif /* !ASSEMBLY */
  88 #endif