u-boot-brain/arch/x86/cpu/x86_64/cpu.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2016 Google, Inc
 * Written by Simon Glass <sjg@chromium.org>
 */

#include <common.h>
#include <cpu_func.h>
#include <debug_uart.h>
#include <init.h>

/*
 * Global declaration of gd.
 *
 * As we write to it before relocation we have to make sure it is not put into
 * a .bss section which may overlap a .rela section. Initialization forces it
 * into a .data section which cannot overlap any .rela section.
 */
struct global_data *global_data_ptr = (struct global_data *)~0;

void arch_setup_gd(gd_t *new_gd)
{
	global_data_ptr = new_gd;
}

int cpu_has_64bit(void)
{
	return true;
}

void enable_caches(void)
{
	/* Not implemented */
}

void disable_caches(void)
{
	/* Not implemented */
}

int dcache_status(void)
{
	return true;
}

int x86_mp_init(void)
{
	/* Not implemented */
	return 0;
}

int misc_init_r(void)
{
	return 0;
}

#ifndef CONFIG_SYS_COREBOOT
int checkcpu(void)
{
	return 0;
}

int print_cpuinfo(void)
{
	return 0;
}
#endif

int x86_cpu_reinit_f(void)
{
	return 0;
}

int cpu_phys_address_size(void)
{
	return CONFIG_CPU_ADDR_BITS;
}