Function cpu_initialize

src/arch/x86/cpu.c:213–269

}

void cpu_initialize(void)
{
	/* Because we busy wait at the printk spinlock.
	 * It is important to keep the number of printed messages
	 * from secondary cpus to a minimum, when debugging is
	 * disabled.
	 */
	struct device *cpu;
	struct cpu_info *info;
	struct cpuinfo_x86 c;

	info = cpu_info();

	printk(BIOS_INFO, "Initializing CPU #%zd\n", info->index);

	cpu = info->cpu;
	if (!cpu)
		die("CPU: missing CPU device structure");

	if (cpu->initialized)
		return;

	post_log_path(cpu);

	/* Find what type of CPU we are dealing with */
	identify_cpu(cpu);
	printk(BIOS_DEBUG, "CPU: vendor %s device %x\n",
		cpu_vendor_name(cpu->vendor), cpu->device);

	get_fms(&c, cpu->device);

	printk(BIOS_DEBUG, "CPU: family %02x, model %02x, stepping %02x\n",
		c.x86, c.x86_model, c.x86_mask);

	/* Lookup the cpu's operations */
	set_cpu_ops(cpu);

	if (!cpu->ops) {
		/* mask out the stepping and try again */
		cpu->device -= c.x86_mask;
		set_cpu_ops(cpu);
		cpu->device += c.x86_mask;
		if (!cpu->ops)
			die("Unknown cpu");
		printk(BIOS_DEBUG, "Using generic CPU ops (good)\n");
	}

	/* Initialize the CPU */
	if (cpu->ops && cpu->ops->init) {
		cpu->enabled = 1;
		cpu->initialized = 1;
		cpu->ops->init(cpu);
	}
	post_log_clear();

	printk(BIOS_INFO, "CPU #%zd initialized\n", info->index);
}