kernel/arch/i386/include/arch_smp.h

   1 #ifndef __SMP_X86_H__
   2 #define __SMP_X86_H__
   3
   4 #include "arch_proto.h" /* K_STACK_SIZE */
   5
   6 #define MAX_NR_INTERRUPT_ENTRIES        128
   7
   8 #ifndef __ASSEMBLY__
   9
  10 /* returns the current cpu id */
  11 #define cpuid   (((u32_t *)(((u32_t)get_stack_frame() + (K_STACK_SIZE - 1)) \
  12                                                 & ~(K_STACK_SIZE - 1)))[-1])
  13 /*
  14  * in case apic or smp is disabled in boot monitor, we need to finish single cpu
  15  * boot using the legacy PIC
  16  */
  17 #define smp_single_cpu_fallback() do {          \
  18           tss_init(0, get_k_stack_top(0));      \
  19           bsp_cpu_id = 0;                       \
  20           ncpus = 1;                            \
  21           bsp_finish_booting();                 \
  22 } while(0)
  23
  24 extern unsigned char cpuid2apicid[CONFIG_MAX_CPUS];
  25
  26 #define barrier()       do { mfence(); } while(0)
  27
  28 #endif
  29
  30 #endif /* __SMP_X86_H__ */
  31