SAFE public projects git trees. - safe/jmp/linux-2.6/blob - include/asm-x86/smp_64.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 #include <linux/cpumask.h>
   5 #include <linux/init.h>
   6
   7 /*
   8  * We need the APIC definitions automatically as part of 'smp.h'
   9  */
  10 #include <asm/apic.h>
  11 #include <asm/io_apic.h>
  12 #include <asm/mpspec.h>
  13 #include <asm/pda.h>
  14 #include <asm/thread_info.h>
  15
  16 extern cpumask_t cpu_initialized;
  17 extern cpumask_t cpu_callin_map;
  18
  19 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
  20                                   void *info, int wait);
  21
  22 #ifdef CONFIG_SMP
  23
  24 #define raw_smp_processor_id()  read_pda(cpunumber)
  25 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
  26
  27 #define stack_smp_processor_id()                                        \
  28         ({                                                              \
  29         struct thread_info *ti;                                         \
  30         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
  31         ti->cpu;                                                        \
  32 })
  33
  34 /*
  35  * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
  36  * scheduling and IPI sending and compresses data structures.
  37  */
  38 static inline int num_booting_cpus(void)
  39 {
  40         return cpus_weight(cpu_callout_map);
  41 }
  42
  43 #else /* CONFIG_SMP */
  44
  45 extern unsigned int boot_cpu_id;
  46 #define cpu_physical_id(cpu)    boot_cpu_id
  47 #define stack_smp_processor_id() 0
  48
  49 #endif /* !CONFIG_SMP */
  50
  51 #define safe_smp_processor_id()         smp_processor_id()
  52
  53 static __inline int logical_smp_processor_id(void)
  54 {
  55         /* we don't want to mark this access volatile - bad code generation */
  56         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
  57 }
  58
  59 #include <mach_apicdef.h>
  60 static inline int hard_smp_processor_id(void)
  61 {
  62         /* we don't want to mark this access volatile - bad code generation */
  63         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
  64 }
  65
  66 #endif
  67