/*
* 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();
phys_cpu_present_map = physid_mask_of_physid(boot_cpu_id);
apic_write(APIC_ID, SET_APIC_ID(boot_cpu_id));
setup_local_APIC();
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;
}
static void apic_setup(void)
{
/* Set the IOAPIC ID to the static value used in the MP/ACPI tables. */
ioapic_write(0x00, IOAPIC_ID);
/* NMIs are delivered direct to the BSP. */
lapic_write(APIC_SPIV, APIC_SPIV_APIC_ENABLED | 0xFF);
lapic_write(APIC_LVT0, (APIC_MODE_EXTINT << 8) | APIC_LVT_MASKED);
lapic_write(APIC_LVT1, APIC_MODE_NMI << 8);
/* 8259A ExtInts are delivered through IOAPIC pin 0 (Virtual Wire Mode). */
ioapic_write(0x10, APIC_DM_EXTINT);
ioapic_write(0x11, SET_APIC_ID(LAPIC_ID(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;
}
static void apic_setup(void)
{
/*
* This would the The Right Thing To Do (tm), if only qemu negotiated
* with Xen where the IO-APIC actually sits (which is currently hard
* coded in Xen and can't be controlled externally). Uncomment this code
* once that changed.
ioapic_base_address |= (pci_readb(PCI_ISA_DEVFN, 0x80) & 0x3f) << 10;
*/
ioapic_version = ioapic_read(0x01) & 0xff;
/* Set the IOAPIC ID to the static value used in the MP/ACPI tables. */
ioapic_write(0x00, IOAPIC_ID);
/* NMIs are delivered direct to the BSP. */
lapic_write(APIC_SPIV, APIC_SPIV_APIC_ENABLED | 0xFF);
lapic_write(APIC_LVT0, (APIC_MODE_EXTINT << 8) | APIC_LVT_MASKED);
lapic_write(APIC_LVT1, APIC_MODE_NMI << 8);
/* 8259A ExtInts are delivered through IOAPIC pin 0 (Virtual Wire Mode). */
ioapic_write(0x10, APIC_DM_EXTINT);
ioapic_write(0x11, SET_APIC_ID(LAPIC_ID(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;
}
