int __init acpi_boot_init()

in kernel/acpi.c [611:686]

• 47 lines of code
• 12 McCabe index (conditional complexity)

int __init acpi_boot_init(void)
{

	/*
	 * MADT
	 * ----
	 * Parse the Multiple APIC Description Table (MADT), if exists.
	 * Note that this table provides platform SMP configuration
	 * information -- the successor to MPS tables.
	 */

	if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
		printk(KERN_ERR PREFIX "Can't find MADT\n");
		goto skip_madt;
	}

	/* Local APIC */

	if (acpi_table_parse_madt
	    (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
		printk(KERN_ERR PREFIX
		       "Error parsing LAPIC address override entry\n");

	if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
	    < 0)
		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");

	/* I/O APIC */

	if (acpi_table_parse_madt
	    (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
		printk(KERN_ERR PREFIX
		       "Error parsing MADT - no IOSAPIC entries\n");
	}

	/* System-Level Interrupt Routing */

	if (acpi_table_parse_madt
	    (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
	     ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
		printk(KERN_ERR PREFIX
		       "Error parsing platform interrupt source entry\n");

	if (acpi_table_parse_madt
	    (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
		printk(KERN_ERR PREFIX
		       "Error parsing interrupt source overrides entry\n");

	if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
      skip_madt:

	/*
	 * FADT says whether a legacy keyboard controller is present.
	 * The FADT also contains an SCI_INT line, by which the system
	 * gets interrupts such as power and sleep buttons.  If it's not
	 * on a Legacy interrupt, it needs to be setup.
	 */
	if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
		printk(KERN_ERR PREFIX "Can't find FADT\n");

#ifdef CONFIG_ACPI_NUMA
#ifdef CONFIG_SMP
	if (srat_num_cpus == 0) {
		int cpu, i = 1;
		for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
			if (smp_boot_data.cpu_phys_id[cpu] !=
			    hard_smp_processor_id())
				node_cpuid[i++].phys_id =
				    smp_boot_data.cpu_phys_id[cpu];
	}
#endif
	build_cpu_to_node_map();
#endif
	return 0;
}