Exemple #1
0
/*
 * This initializes the IO-APIC and APIC hardware if this is
 * a UP kernel.
 */
int __init APIC_init_uniprocessor(void)
{
    if (disable_apic) {
        printk(KERN_INFO "Apic disabled\n");
        return -1;
    }
    if (!cpu_has_apic) {
        disable_apic = 1;
        printk(KERN_INFO "Apic disabled by BIOS\n");
        return -1;
    }

    verify_local_APIC();

    connect_bsp_APIC();

    physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
    apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));

    setup_local_APIC();

    /*
     * Now enable IO-APICs, actually call clear_IO_APIC
     * We need clear_IO_APIC before enabling vector on BP
     */
    if (!skip_ioapic_setup && nr_ioapics)
        enable_IO_APIC();

    if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
        localise_nmi_watchdog();
    end_local_APIC_setup();

    if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
        setup_IO_APIC();
    else
        nr_ioapics = 0;
    setup_boot_APIC_clock();
    check_nmi_watchdog();
    return 0;
}
Exemple #2
0
int __init APIC_init_uniprocessor(void)
{
    if (disable_apic) {
        pr_info("Apic disabled\n");
        return -1;
    }
#ifdef CONFIG_X86_64
    if (!cpu_has_apic) {
        disable_apic = 1;
        pr_info("Apic disabled by BIOS\n");
        return -1;
    }
#else
    if (!smp_found_config && !cpu_has_apic)
        return -1;


    if (!cpu_has_apic &&
            APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
        pr_err("BIOS bug, local APIC 0x%x not detected!...\n",
               boot_cpu_physical_apicid);
        return -1;
    }
#endif

    enable_IR_x2apic();
#ifdef CONFIG_X86_64
    default_setup_apic_routing();
#endif

    verify_local_APIC();
    connect_bsp_APIC();

#ifdef CONFIG_X86_64
    apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
#else

# ifdef CONFIG_CRASH_DUMP
    boot_cpu_physical_apicid = read_apic_id();
# endif
#endif
    physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
    setup_local_APIC();

#ifdef CONFIG_X86_IO_APIC

    if (!skip_ioapic_setup && nr_ioapics)
        enable_IO_APIC();
#endif

    end_local_APIC_setup();

#ifdef CONFIG_X86_IO_APIC
    if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
        setup_IO_APIC();
    else {
        nr_ioapics = 0;
        localise_nmi_watchdog();
    }
#else
    localise_nmi_watchdog();
#endif

    x86_init.timers.setup_percpu_clockev();
#ifdef CONFIG_X86_64
    check_nmi_watchdog();
#endif

    return 0;
}