void __init setup_boot_APIC_clock(void)
{
unsigned long flags;
apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n");
using_apic_timer = 1;
local_irq_save(flags);
calibration_result = calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
setup_APIC_timer(calibration_result);
local_irq_restore(flags);
}
void __init setup_boot_APIC_clock(void)
{
if (disable_apic_timer) {
pr_info("Disabling APIC timer\n");
if (num_possible_cpus() > 1) {
lapic_clockevent.mult = 1;
setup_APIC_timer();
}
return;
}
apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n"
"calibrating APIC timer ...\n");
if (calibrate_APIC_clock()) {
if (num_possible_cpus() > 1)
setup_APIC_timer();
return;
}
if (nmi_watchdog != NMI_IO_APIC)
lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
else
pr_warning("APIC timer registered as dummy,"
" due to nmi_watchdog=%d!\n", nmi_watchdog);
setup_APIC_timer();
}
void __init setup_boot_APIC_clock (void)
{
/*
* The local apic timer can be disabled via the kernel commandline.
* Register the lapic timer as a dummy clock event source on SMP
* systems, so the broadcast mechanism is used. On UP systems simply
* ignore it.
*/
if (disable_apic_timer) {
printk(KERN_INFO "Disabling APIC timer\n");
/* No broadcast on UP ! */
if (num_possible_cpus() > 1)
setup_APIC_timer();
return;
}
printk(KERN_INFO "Using local APIC timer interrupts.\n");
calibrate_APIC_clock();
/*
* If nmi_watchdog is set to IO_APIC, we need the
* PIT/HPET going. Otherwise register lapic as a dummy
* device.
*/
if (nmi_watchdog != NMI_IO_APIC)
lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
else
printk(KERN_WARNING "APIC timer registered as dummy,"
" due to nmi_watchdog=1!\n");
setup_APIC_timer();
}
void __init setup_boot_APIC_clock(void)
{
apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n");
using_apic_timer = 1;
local_irq_disable();
calibration_result = calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
setup_APIC_timer(calibration_result);
local_irq_enable();
}
void __init setup_APIC_clocks (void)
{
printk("Using local APIC timer interrupts.\n");
using_apic_timer = 1;
__cli();
calibration_result = calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
setup_APIC_timer((void *)calibration_result);
__sti();
/* and update all other cpus */
smp_call_function(setup_APIC_timer, (void *)calibration_result, 1, 1);
}
void __init setup_boot_APIC_clock(void)
{
unsigned long flags;
apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n");
using_apic_timer = 1;
local_irq_save(flags);
calibrate_APIC_clock();
if ( tdt_enable && boot_cpu_has(X86_FEATURE_TSC_DEADLINE) )
{
printk(KERN_DEBUG "TSC deadline timer enabled\n");
tdt_enabled = 1;
}
setup_APIC_timer();
local_irq_restore(flags);
}
void __init setup_boot_APIC_clock (void)
{
if (disable_apic_timer) {
printk(KERN_INFO "Disabling APIC timer\n");
return;
}
printk(KERN_INFO "Using local APIC timer interrupts.\n");
using_apic_timer = 1;
local_irq_disable();
calibration_result = calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
setup_APIC_timer(calibration_result);
local_irq_enable();
}
void __init setup_APIC_clocks (void)
{
/* Disabled by DMI scan or kernel option? */
if (dont_use_local_apic_timer)
return;
printk("Using local APIC timer interrupts.\n");
using_apic_timer = 1;
__cli();
calibration_result = calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
setup_APIC_timer((void *)(u64)calibration_result);
__sti();
/* and update all other cpus */
smp_call_function(setup_APIC_timer, (void *)(u64)calibration_result, 1, 1);
}