boot_cpu.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <smp/node.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/lapic_def.h>
 
#if CONFIG(SMP)
int boot_cpu(void)
{
        int bsp;
        msr_t msr;
        msr = rdmsr(LAPIC_BASE_MSR);
        bsp = !!(msr.lo & (1 << 8));
        return bsp;
}
#endif