/*
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
int __init APIC_init_uniprocessor (void)
{
if (!smp_found_config && !cpu_has_apic)
return -1;
/*
* Complain if the BIOS pretends there is one.
*/
if (!cpu_has_apic && APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_physical_apicid);
return -1;
}
verify_local_APIC();
connect_bsp_APIC();
phys_cpu_present_map = 1 << boot_cpu_physical_apicid;
apic_pm_init2();
setup_local_APIC();
if (nmi_watchdog == NMI_LOCAL_APIC)
check_nmi_watchdog();
#ifdef CONFIG_X86_IO_APIC
if (smp_found_config)
if (!skip_ioapic_setup && nr_ioapics)
setup_IO_APIC();
#endif
setup_APIC_clocks();
return 0;
}
/*
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
int __init APIC_init_uniprocessor (void)
{
if (apic_disabled)
clear_bit(X86_FEATURE_APIC, &boot_cpu_data.x86_capability);
if (!cpu_has_apic)
{
printk("No APIC available.\n");
apic_disabled = 1;
return -1;
}
/*
* Complain if the BIOS pretends there is one.
*/
if (!cpu_has_apic && APIC_INTEGRATED(apic_version[boot_cpu_id]))
{
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_id);
apic_disabled = 1;
return -1;
}
verify_local_APIC();
connect_bsp_APIC();
phys_cpu_present_map = 1;
apic_write_around(APIC_ID, boot_cpu_id);
apic_pm_init2();
setup_local_APIC();
if (nmi_watchdog == NMI_LOCAL_APIC)
check_nmi_watchdog();
#ifdef CONFIG_X86_IO_APIC
if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
setup_IO_APIC();
else
nr_ioapics = 0;
#endif
setup_APIC_clocks();
return 0;
}
