src/cpu/x86/lapic/boot_cpu.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cpu/x86/lapic_def.h>
   4 #include <cpu/x86/msr.h>
   5 #include <smp/node.h>
   6
   7 #if CONFIG(SMP)
   8 int boot_cpu(void)
   9 {
  10         int bsp;
  11         msr_t msr;
  12         msr = rdmsr(LAPIC_BASE_MSR);
  13         bsp = !!(msr.lo & (1 << 8));
  14         return bsp;
  15 }
  16 #endif