i386: prepare shared kernel/apic.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 1566 deletions

diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
deleted file mode 100644
index 3d67ae18d76..00000000000
--- a/arch/i386/kernel/apic.c
+++ /dev/null
@@ -1,1566 +0,0 @@
-/*
- *	Local APIC handling, local APIC timers
- *
- *	(c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
- *
- *	Fixes
- *	Maciej W. Rozycki	:	Bits for genuine 82489DX APICs;
- *					thanks to Eric Gilmore
- *					and Rolf G. Tews
- *					for testing these extensively.
- *	Maciej W. Rozycki	:	Various updates and fixes.
- *	Mikael Pettersson	:	Power Management for UP-APIC.
- *	Pavel Machek and
- *	Mikael Pettersson	:	PM converted to driver model.
- */
-
-#include <linux/init.h>
-
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/bootmem.h>
-#include <linux/interrupt.h>
-#include <linux/mc146818rtc.h>
-#include <linux/kernel_stat.h>
-#include <linux/sysdev.h>
-#include <linux/cpu.h>
-#include <linux/clockchips.h>
-#include <linux/acpi_pmtmr.h>
-#include <linux/module.h>
-#include <linux/dmi.h>
-
-#include <asm/atomic.h>
-#include <asm/smp.h>
-#include <asm/mtrr.h>
-#include <asm/mpspec.h>
-#include <asm/desc.h>
-#include <asm/arch_hooks.h>
-#include <asm/hpet.h>
-#include <asm/i8253.h>
-#include <asm/nmi.h>
-
-#include <mach_apic.h>
-#include <mach_apicdef.h>
-#include <mach_ipi.h>
-
-#include "io_ports.h"
-
-/*
- * Sanity check
- */
-#if (SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F
-# error SPURIOUS_APIC_VECTOR definition error
-#endif
-
-/*
- * Knob to control our willingness to enable the local APIC.
- *
- * -1=force-disable, +1=force-enable
- */
-static int enable_local_apic __initdata = 0;
-
-/* Local APIC timer verification ok */
-static int local_apic_timer_verify_ok;
-/* Disable local APIC timer from the kernel commandline or via dmi quirk
-   or using CPU MSR check */
-int local_apic_timer_disabled;
-/* Local APIC timer works in C2 */
-int local_apic_timer_c2_ok;
-EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
-
-/*
- * Debug level, exported for io_apic.c
- */
-int apic_verbosity;
-
-static unsigned int calibration_result;
-
-static int lapic_next_event(unsigned long delta,
-			    struct clock_event_device *evt);
-static void lapic_timer_setup(enum clock_event_mode mode,
-			      struct clock_event_device *evt);
-static void lapic_timer_broadcast(cpumask_t mask);
-static void apic_pm_activate(void);
-
-/*
- * The local apic timer can be used for any function which is CPU local.
- */
-static struct clock_event_device lapic_clockevent = {
-	.name		= "lapic",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT
-			| CLOCK_EVT_FEAT_C3STOP | CLOCK_EVT_FEAT_DUMMY,
-	.shift		= 32,
-	.set_mode	= lapic_timer_setup,
-	.set_next_event	= lapic_next_event,
-	.broadcast	= lapic_timer_broadcast,
-	.rating		= 100,
-	.irq		= -1,
-};
-static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
-
-/* Local APIC was disabled by the BIOS and enabled by the kernel */
-static int enabled_via_apicbase;
-
-/*
- * Get the LAPIC version
- */
-static inline int lapic_get_version(void)
-{
-	return GET_APIC_VERSION(apic_read(APIC_LVR));
-}
-
-/*
- * Check, if the APIC is integrated or a seperate chip
- */
-static inline int lapic_is_integrated(void)
-{
-	return APIC_INTEGRATED(lapic_get_version());
-}
-
-/*
- * Check, whether this is a modern or a first generation APIC
- */
-static int modern_apic(void)
-{
-	/* AMD systems use old APIC versions, so check the CPU */
-	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-	    boot_cpu_data.x86 >= 0xf)
-		return 1;
-	return lapic_get_version() >= 0x14;
-}
-
-void apic_wait_icr_idle(void)
-{
-	while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
-		cpu_relax();
-}
-
-unsigned long safe_apic_wait_icr_idle(void)
-{
-	unsigned long send_status;
-	int timeout;
-
-	timeout = 0;
-	do {
-		send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
-		if (!send_status)
-			break;
-		udelay(100);
-	} while (timeout++ < 1000);
-
-	return send_status;
-}
-
-/**
- * enable_NMI_through_LVT0 - enable NMI through local vector table 0
- */
-void enable_NMI_through_LVT0 (void * dummy)
-{
-	unsigned int v = APIC_DM_NMI;
-
-	/* Level triggered for 82489DX */
-	if (!lapic_is_integrated())
-		v |= APIC_LVT_LEVEL_TRIGGER;
-	apic_write_around(APIC_LVT0, v);
-}
-
-/**
- * get_physical_broadcast - Get number of physical broadcast IDs
- */
-int get_physical_broadcast(void)
-{
-	return modern_apic() ? 0xff : 0xf;
-}
-
-/**
- * lapic_get_maxlvt - get the maximum number of local vector table entries
- */
-int lapic_get_maxlvt(void)
-{
-	unsigned int v = apic_read(APIC_LVR);
-
-	/* 82489DXs do not report # of LVT entries. */
-	return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
-}
-
-/*
- * Local APIC timer
- */
-
-/* Clock divisor is set to 16 */
-#define APIC_DIVISOR 16
-
-/*
- * This function sets up the local APIC timer, with a timeout of
- * 'clocks' APIC bus clock. During calibration we actually call
- * this function twice on the boot CPU, once with a bogus timeout
- * value, second time for real. The other (noncalibrating) CPUs
- * call this function only once, with the real, calibrated value.
- *
- * We do reads before writes even if unnecessary, to get around the
- * P5 APIC double write bug.
- */
-static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
-{
-	unsigned int lvtt_value, tmp_value;
-
-	lvtt_value = LOCAL_TIMER_VECTOR;
-	if (!oneshot)
-		lvtt_value |= APIC_LVT_TIMER_PERIODIC;
-	if (!lapic_is_integrated())
-		lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV);
-
-	if (!irqen)
-		lvtt_value |= APIC_LVT_MASKED;
-
-	apic_write_around(APIC_LVTT, lvtt_value);
-
-	/*
-	 * Divide PICLK by 16
-	 */
-	tmp_value = apic_read(APIC_TDCR);
-	apic_write_around(APIC_TDCR, (tmp_value
-				& ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE))
-				| APIC_TDR_DIV_16);
-
-	if (!oneshot)
-		apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR);
-}
-
-/*
- * Program the next event, relative to now
- */
-static int lapic_next_event(unsigned long delta,
-			    struct clock_event_device *evt)
-{
-	apic_write_around(APIC_TMICT, delta);
-	return 0;
-}
-
-/*
- * Setup the lapic timer in periodic or oneshot mode
- */
-static void lapic_timer_setup(enum clock_event_mode mode,
-			      struct clock_event_device *evt)
-{
-	unsigned long flags;
-	unsigned int v;
-
-	/* Lapic used for broadcast ? */
-	if (!local_apic_timer_verify_ok)
-		return;
-
-	local_irq_save(flags);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-	case CLOCK_EVT_MODE_ONESHOT:
-		__setup_APIC_LVTT(calibration_result,
-				  mode != CLOCK_EVT_MODE_PERIODIC, 1);
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		v = apic_read(APIC_LVTT);
-		v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
-		apic_write_around(APIC_LVTT, v);
-		break;
-	case CLOCK_EVT_MODE_RESUME:
-		/* Nothing to do here */
-		break;
-	}
-
-	local_irq_restore(flags);
-}
-
-/*
- * Local APIC timer broadcast function
- */
-static void lapic_timer_broadcast(cpumask_t mask)
-{
-#ifdef CONFIG_SMP
-	send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
-#endif
-}
-
-/*
- * Setup the local APIC timer for this CPU. Copy the initilized values
- * of the boot CPU and register the clock event in the framework.
- */
-static void __devinit setup_APIC_timer(void)
-{
-	struct clock_event_device *levt = &__get_cpu_var(lapic_events);
-
-	memcpy(levt, &lapic_clockevent, sizeof(*levt));
-	levt->cpumask = cpumask_of_cpu(smp_processor_id());
-
-	clockevents_register_device(levt);
-}
-
-/*
- * In this functions we calibrate APIC bus clocks to the external timer.
- *
- * We want to do the calibration only once since we want to have local timer
- * irqs syncron. CPUs connected by the same APIC bus have the very same bus
- * frequency.
- *
- * This was previously done by reading the PIT/HPET and waiting for a wrap
- * around to find out, that a tick has elapsed. I have a box, where the PIT
- * readout is broken, so it never gets out of the wait loop again. This was
- * also reported by others.
- *
- * Monitoring the jiffies value is inaccurate and the clockevents
- * infrastructure allows us to do a simple substitution of the interrupt
- * handler.
- *
- * The calibration routine also uses the pm_timer when possible, as the PIT
- * happens to run way too slow (factor 2.3 on my VAIO CoreDuo, which goes
- * back to normal later in the boot process).
- */
-
-#define LAPIC_CAL_LOOPS		(HZ/10)
-
-static __initdata int lapic_cal_loops = -1;
-static __initdata long lapic_cal_t1, lapic_cal_t2;
-static __initdata unsigned long long lapic_cal_tsc1, lapic_cal_tsc2;
-static __initdata unsigned long lapic_cal_pm1, lapic_cal_pm2;
-static __initdata unsigned long lapic_cal_j1, lapic_cal_j2;
-
-/*
- * Temporary interrupt handler.
- */
-static void __init lapic_cal_handler(struct clock_event_device *dev)
-{
-	unsigned long long tsc = 0;
-	long tapic = apic_read(APIC_TMCCT);
-	unsigned long pm = acpi_pm_read_early();
-
-	if (cpu_has_tsc)
-		rdtscll(tsc);
-
-	switch (lapic_cal_loops++) {
-	case 0:
-		lapic_cal_t1 = tapic;
-		lapic_cal_tsc1 = tsc;
-		lapic_cal_pm1 = pm;
-		lapic_cal_j1 = jiffies;
-		break;
-
-	case LAPIC_CAL_LOOPS:
-		lapic_cal_t2 = tapic;
-		lapic_cal_tsc2 = tsc;
-		if (pm < lapic_cal_pm1)
-			pm += ACPI_PM_OVRRUN;
-		lapic_cal_pm2 = pm;
-		lapic_cal_j2 = jiffies;
-		break;
-	}
-}
-
-/*
- * Setup the boot APIC
- *
- * Calibrate and verify the result.
- */
-void __init setup_boot_APIC_clock(void)
-{
-	struct clock_event_device *levt = &__get_cpu_var(lapic_events);
-	const long pm_100ms = PMTMR_TICKS_PER_SEC/10;
-	const long pm_thresh = pm_100ms/100;
-	void (*real_handler)(struct clock_event_device *dev);
-	unsigned long deltaj;
-	long delta, deltapm;
-	int pm_referenced = 0;
-
-	/*
-	 * The local apic timer can be disabled via the kernel
-	 * commandline or from the CPU detection code. 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 (local_apic_timer_disabled) {
-		/* No broadcast on UP ! */
-		if (num_possible_cpus() > 1)
-			setup_APIC_timer();
-		return;
-	}
-
-	apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n"
-		    "calibrating APIC timer ...\n");
-
-	local_irq_disable();
-
-	/* Replace the global interrupt handler */
-	real_handler = global_clock_event->event_handler;
-	global_clock_event->event_handler = lapic_cal_handler;
-
-	/*
-	 * Setup the APIC counter to 1e9. There is no way the lapic
-	 * can underflow in the 100ms detection time frame
-	 */
-	__setup_APIC_LVTT(1000000000, 0, 0);
-
-	/* Let the interrupts run */
-	local_irq_enable();
-
-	while (lapic_cal_loops <= LAPIC_CAL_LOOPS)
-		cpu_relax();
-
-	local_irq_disable();
-
-	/* Restore the real event handler */
-	global_clock_event->event_handler = real_handler;
-
-	/* Build delta t1-t2 as apic timer counts down */
-	delta = lapic_cal_t1 - lapic_cal_t2;
-	apic_printk(APIC_VERBOSE, "... lapic delta = %ld\n", delta);
-
-	/* Check, if the PM timer is available */
-	deltapm = lapic_cal_pm2 - lapic_cal_pm1;
-	apic_printk(APIC_VERBOSE, "... PM timer delta = %ld\n", deltapm);
-
-	if (deltapm) {
-		unsigned long mult;
-		u64 res;
-
-		mult = clocksource_hz2mult(PMTMR_TICKS_PER_SEC, 22);
-
-		if (deltapm > (pm_100ms - pm_thresh) &&
-		    deltapm < (pm_100ms + pm_thresh)) {
-			apic_printk(APIC_VERBOSE, "... PM timer result ok\n");
-		} else {
-			res = (((u64) deltapm) *  mult) >> 22;
-			do_div(res, 1000000);
-			printk(KERN_WARNING "APIC calibration not consistent "
-			       "with PM Timer: %ldms instead of 100ms\n",
-			       (long)res);
-			/* Correct the lapic counter value */
-			res = (((u64) delta ) * pm_100ms);
-			do_div(res, deltapm);
-			printk(KERN_INFO "APIC delta adjusted to PM-Timer: "
-			       "%lu (%ld)\n", (unsigned long) res, delta);
-			delta = (long) res;
-		}
-		pm_referenced = 1;
-	}
-
-	/* Calculate the scaled math multiplication factor */
-	lapic_clockevent.mult = div_sc(delta, TICK_NSEC * LAPIC_CAL_LOOPS, 32);
-	lapic_clockevent.max_delta_ns =
-		clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
-	lapic_clockevent.min_delta_ns =
-		clockevent_delta2ns(0xF, &lapic_clockevent);
-
-	calibration_result = (delta * APIC_DIVISOR) / LAPIC_CAL_LOOPS;
-
-	apic_printk(APIC_VERBOSE, "..... delta %ld\n", delta);
-	apic_printk(APIC_VERBOSE, "..... mult: %ld\n", lapic_clockevent.mult);
-	apic_printk(APIC_VERBOSE, "..... calibration result: %u\n",
-		    calibration_result);
-
-	if (cpu_has_tsc) {
-		delta = (long)(lapic_cal_tsc2 - lapic_cal_tsc1);
-		apic_printk(APIC_VERBOSE, "..... CPU clock speed is "
-			    "%ld.%04ld MHz.\n",
-			    (delta / LAPIC_CAL_LOOPS) / (1000000 / HZ),
-			    (delta / LAPIC_CAL_LOOPS) % (1000000 / HZ));
-	}
-
-	apic_printk(APIC_VERBOSE, "..... host bus clock speed is "
-		    "%u.%04u MHz.\n",
-		    calibration_result / (1000000 / HZ),
-		    calibration_result % (1000000 / HZ));
-
-	local_apic_timer_verify_ok = 1;
-
-	/* We trust the pm timer based calibration */
-	if (!pm_referenced) {
-		apic_printk(APIC_VERBOSE, "... verify APIC timer\n");
-
-		/*
-		 * Setup the apic timer manually
-		 */
-		levt->event_handler = lapic_cal_handler;
-		lapic_timer_setup(CLOCK_EVT_MODE_PERIODIC, levt);
-		lapic_cal_loops = -1;
-
-		/* Let the interrupts run */
-		local_irq_enable();
-
-		while (lapic_cal_loops <= LAPIC_CAL_LOOPS)
-			cpu_relax();
-
-		local_irq_disable();
-
-		/* Stop the lapic timer */
-		lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, levt);
-
-		local_irq_enable();
-
-		/* Jiffies delta */
-		deltaj = lapic_cal_j2 - lapic_cal_j1;
-		apic_printk(APIC_VERBOSE, "... jiffies delta = %lu\n", deltaj);
-
-		/* Check, if the jiffies result is consistent */
-		if (deltaj >= LAPIC_CAL_LOOPS-2 && deltaj <= LAPIC_CAL_LOOPS+2)
-			apic_printk(APIC_VERBOSE, "... jiffies result ok\n");
-		else
-			local_apic_timer_verify_ok = 0;
-	} else
-		local_irq_enable();
-
-	if (!local_apic_timer_verify_ok) {
-		printk(KERN_WARNING
-		       "APIC timer disabled due to verification failure.\n");
-		/* No broadcast on UP ! */
-		if (num_possible_cpus() == 1)
-			return;
-	} else {
-		/*
-		 * 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 the lapic or request the broadcast */
-	setup_APIC_timer();
-}
-
-void __devinit setup_secondary_APIC_clock(void)
-{
-	setup_APIC_timer();
-}
-
-/*
- * The guts of the apic timer interrupt
- */
-static void local_apic_timer_interrupt(void)
-{
-	int cpu = smp_processor_id();
-	struct clock_event_device *evt = &per_cpu(lapic_events, cpu);
-
-	/*
-	 * Normally we should not be here till LAPIC has been initialized but
-	 * in some cases like kdump, its possible that there is a pending LAPIC
-	 * timer interrupt from previous kernel's context and is delivered in
-	 * new kernel the moment interrupts are enabled.
-	 *
-	 * Interrupts are enabled early and LAPIC is setup much later, hence
-	 * its possible that when we get here evt->event_handler is NULL.
-	 * Check for event_handler being NULL and discard the interrupt as
-	 * spurious.
-	 */
-	if (!evt->event_handler) {
-		printk(KERN_WARNING
-		       "Spurious LAPIC timer interrupt on cpu %d\n", cpu);
-		/* Switch it off */
-		lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, evt);
-		return;
-	}
-
-	per_cpu(irq_stat, cpu).apic_timer_irqs++;
-
-	evt->event_handler(evt);
-}
-
-/*
- * Local APIC timer interrupt. This is the most natural way for doing
- * local interrupts, but local timer interrupts can be emulated by
- * broadcast interrupts too. [in case the hw doesn't support APIC timers]
- *
- * [ if a single-CPU system runs an SMP kernel then we call the local
- *   interrupt as well. Thus we cannot inline the local irq ... ]
- */
-
-void fastcall smp_apic_timer_interrupt(struct pt_regs *regs)
-{
-	struct pt_regs *old_regs = set_irq_regs(regs);
-
-	/*
-	 * NOTE! We'd better ACK the irq immediately,
-	 * because timer handling can be slow.
-	 */
-	ack_APIC_irq();
-	/*
-	 * update_process_times() expects us to have done irq_enter().
-	 * Besides, if we don't timer interrupts ignore the global
-	 * interrupt lock, which is the WrongThing (tm) to do.
-	 */
-	irq_enter();
-	local_apic_timer_interrupt();
-	irq_exit();
-
-	set_irq_regs(old_regs);
-}
-
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
-/*
- * Local APIC start and shutdown
- */
-
-/**
- * clear_local_APIC - shutdown the local APIC
- *
- * This is called, when a CPU is disabled and before rebooting, so the state of
- * the local APIC has no dangling leftovers. Also used to cleanout any BIOS
- * leftovers during boot.
- */
-void clear_local_APIC(void)
-{
-	int maxlvt = lapic_get_maxlvt();
-	unsigned long v;
-
-	/*
-	 * Masking an LVT entry can trigger a local APIC error
-	 * if the vector is zero. Mask LVTERR first to prevent this.
-	 */
-	if (maxlvt >= 3) {
-		v = ERROR_APIC_VECTOR; /* any non-zero vector will do */
-		apic_write_around(APIC_LVTERR, v | APIC_LVT_MASKED);
-	}
-	/*
-	 * Careful: we have to set masks only first to deassert
-	 * any level-triggered sources.
-	 */
-	v = apic_read(APIC_LVTT);
-	apic_write_around(APIC_LVTT, v | APIC_LVT_MASKED);
-	v = apic_read(APIC_LVT0);
-	apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED);
-	v = apic_read(APIC_LVT1);
-	apic_write_around(APIC_LVT1, v | APIC_LVT_MASKED);
-	if (maxlvt >= 4) {
-		v = apic_read(APIC_LVTPC);
-		apic_write_around(APIC_LVTPC, v | APIC_LVT_MASKED);
-	}
-
-	/* lets not touch this if we didn't frob it */
-#ifdef CONFIG_X86_MCE_P4THERMAL
-	if (maxlvt >= 5) {
-		v = apic_read(APIC_LVTTHMR);
-		apic_write_around(APIC_LVTTHMR, v | APIC_LVT_MASKED);
-	}
-#endif
-	/*
-	 * Clean APIC state for other OSs:
-	 */
-	apic_write_around(APIC_LVTT, APIC_LVT_MASKED);
-	apic_write_around(APIC_LVT0, APIC_LVT_MASKED);
-	apic_write_around(APIC_LVT1, APIC_LVT_MASKED);
-	if (maxlvt >= 3)
-		apic_write_around(APIC_LVTERR, APIC_LVT_MASKED);
-	if (maxlvt >= 4)
-		apic_write_around(APIC_LVTPC, APIC_LVT_MASKED);
-
-#ifdef CONFIG_X86_MCE_P4THERMAL
-	if (maxlvt >= 5)
-		apic_write_around(APIC_LVTTHMR, APIC_LVT_MASKED);
-#endif
-	/* Integrated APIC (!82489DX) ? */
-	if (lapic_is_integrated()) {
-		if (maxlvt > 3)
-			/* Clear ESR due to Pentium errata 3AP and 11AP */
-			apic_write(APIC_ESR, 0);
-		apic_read(APIC_ESR);
-	}
-}
-
-/**
- * disable_local_APIC - clear and disable the local APIC
- */
-void disable_local_APIC(void)
-{
-	unsigned long value;
-
-	clear_local_APIC();
-
-	/*
-	 * Disable APIC (implies clearing of registers
-	 * for 82489DX!).
-	 */
-	value = apic_read(APIC_SPIV);
-	value &= ~APIC_SPIV_APIC_ENABLED;
-	apic_write_around(APIC_SPIV, value);
-
-	/*
-	 * When LAPIC was disabled by the BIOS and enabled by the kernel,
-	 * restore the disabled state.
-	 */
-	if (enabled_via_apicbase) {
-		unsigned int l, h;
-
-		rdmsr(MSR_IA32_APICBASE, l, h);
-		l &= ~MSR_IA32_APICBASE_ENABLE;
-		wrmsr(MSR_IA32_APICBASE, l, h);
-	}
-}
-
-/*
- * If Linux enabled the LAPIC against the BIOS default disable it down before
- * re-entering the BIOS on shutdown.  Otherwise the BIOS may get confused and
- * not power-off.  Additionally clear all LVT entries before disable_local_APIC
- * for the case where Linux didn't enable the LAPIC.
- */
-void lapic_shutdown(void)
-{
-	unsigned long flags;
-
-	if (!cpu_has_apic)
-		return;
-
-	local_irq_save(flags);
-	clear_local_APIC();
-
-	if (enabled_via_apicbase)
-		disable_local_APIC();
-
-	local_irq_restore(flags);
-}
-
-/*
- * This is to verify that we're looking at a real local APIC.
- * Check these against your board if the CPUs aren't getting
- * started for no apparent reason.
- */
-int __init verify_local_APIC(void)
-{
-	unsigned int reg0, reg1;
-
-	/*
-	 * The version register is read-only in a real APIC.
-	 */
-	reg0 = apic_read(APIC_LVR);
-	apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg0);
-	apic_write(APIC_LVR, reg0 ^ APIC_LVR_MASK);
-	reg1 = apic_read(APIC_LVR);
-	apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg1);
-
-	/*
-	 * The two version reads above should print the same
-	 * numbers.  If the second one is different, then we
-	 * poke at a non-APIC.
-	 */
-	if (reg1 != reg0)
-		return 0;
-
-	/*
-	 * Check if the version looks reasonably.
-	 */
-	reg1 = GET_APIC_VERSION(reg0);
-	if (reg1 == 0x00 || reg1 == 0xff)
-		return 0;
-	reg1 = lapic_get_maxlvt();
-	if (reg1 < 0x02 || reg1 == 0xff)
-		return 0;
-
-	/*
-	 * The ID register is read/write in a real APIC.
-	 */
-	reg0 = apic_read(APIC_ID);
-	apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg0);
-
-	/*
-	 * The next two are just to see if we have sane values.
-	 * They're only really relevant if we're in Virtual Wire
-	 * compatibility mode, but most boxes are anymore.
-	 */
-	reg0 = apic_read(APIC_LVT0);
-	apic_printk(APIC_DEBUG, "Getting LVT0: %x\n", reg0);
-	reg1 = apic_read(APIC_LVT1);
-	apic_printk(APIC_DEBUG, "Getting LVT1: %x\n", reg1);
-
-	return 1;
-}
-
-/**
- * sync_Arb_IDs - synchronize APIC bus arbitration IDs
- */
-void __init sync_Arb_IDs(void)
-{
-	/*
-	 * Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
-	 * needed on AMD.
-	 */
-	if (modern_apic())
-		return;
-	/*
-	 * Wait for idle.
-	 */
-	apic_wait_icr_idle();
-
-	apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
-	apic_write_around(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG
-				| APIC_DM_INIT);
-}
-
-/*
- * An initial setup of the virtual wire mode.
- */
-void __init init_bsp_APIC(void)
-{
-	unsigned long value;
-
-	/*
-	 * Don't do the setup now if we have a SMP BIOS as the
-	 * through-I/O-APIC virtual wire mode might be active.
-	 */
-	if (smp_found_config || !cpu_has_apic)
-		return;
-
-	/*
-	 * Do not trust the local APIC being empty at bootup.
-	 */
-	clear_local_APIC();
-
-	/*
-	 * Enable APIC.
-	 */
-	value = apic_read(APIC_SPIV);
-	value &= ~APIC_VECTOR_MASK;
-	value |= APIC_SPIV_APIC_ENABLED;
-
-	/* This bit is reserved on P4/Xeon and should be cleared */
-	if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
-	    (boot_cpu_data.x86 == 15))
-		value &= ~APIC_SPIV_FOCUS_DISABLED;
-	else
-		value |= APIC_SPIV_FOCUS_DISABLED;
-	value |= SPURIOUS_APIC_VECTOR;
-	apic_write_around(APIC_SPIV, value);
-
-	/*
-	 * Set up the virtual wire mode.
-	 */
-	apic_write_around(APIC_LVT0, APIC_DM_EXTINT);
-	value = APIC_DM_NMI;
-	if (!lapic_is_integrated())		/* 82489DX */
-		value |= APIC_LVT_LEVEL_TRIGGER;
-	apic_write_around(APIC_LVT1, value);
-}
-
-/**
- * setup_local_APIC - setup the local APIC
- */
-void __devinit setup_local_APIC(void)
-{
-	unsigned long oldvalue, value, maxlvt, integrated;
-	int i, j;
-
-	/* Pound the ESR really hard over the head with a big hammer - mbligh */
-	if (esr_disable) {
-		apic_write(APIC_ESR, 0);
-		apic_write(APIC_ESR, 0);
-		apic_write(APIC_ESR, 0);
-		apic_write(APIC_ESR, 0);
-	}
-
-	integrated = lapic_is_integrated();
-
-	/*
-	 * Double-check whether this APIC is really registered.
-	 */
-	if (!apic_id_registered())
-		BUG();
-
-	/*
-	 * Intel recommends to set DFR, LDR and TPR before enabling
-	 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
-	 * document number 292116).  So here it goes...
-	 */
-	init_apic_ldr();
-
-	/*
-	 * Set Task Priority to 'accept all'. We never change this
-	 * later on.
-	 */
-	value = apic_read(APIC_TASKPRI);
-	value &= ~APIC_TPRI_MASK;
-	apic_write_around(APIC_TASKPRI, value);
-
-	/*
-	 * After a crash, we no longer service the interrupts and a pending
-	 * interrupt from previous kernel might still have ISR bit set.
-	 *
-	 * Most probably by now CPU has serviced that pending interrupt and
-	 * it might not have done the ack_APIC_irq() because it thought,
-	 * interrupt came from i8259 as ExtInt. LAPIC did not get EOI so it
-	 * does not clear the ISR bit and cpu thinks it has already serivced
-	 * the interrupt. Hence a vector might get locked. It was noticed
-	 * for timer irq (vector 0x31). Issue an extra EOI to clear ISR.
-	 */
-	for (i = APIC_ISR_NR - 1; i >= 0; i--) {
-		value = apic_read(APIC_ISR + i*0x10);
-		for (j = 31; j >= 0; j--) {
-			if (value & (1<<j))
-				ack_APIC_irq();
-		}
-	}
-
-	/*
-	 * Now that we are all set up, enable the APIC
-	 */
-	value = apic_read(APIC_SPIV);
-	value &= ~APIC_VECTOR_MASK;
-	/*
-	 * Enable APIC
-	 */
-	value |= APIC_SPIV_APIC_ENABLED;
-
-	/*
-	 * Some unknown Intel IO/APIC (or APIC) errata is biting us with
-	 * certain networking cards. If high frequency interrupts are
-	 * happening on a particular IOAPIC pin, plus the IOAPIC routing
-	 * entry is masked/unmasked at a high rate as well then sooner or
-	 * later IOAPIC line gets 'stuck', no more interrupts are received
-	 * from the device. If focus CPU is disabled then the hang goes
-	 * away, oh well :-(
-	 *
-	 * [ This bug can be reproduced easily with a level-triggered
-	 *   PCI Ne2000 networking cards and PII/PIII processors, dual
-	 *   BX chipset. ]
-	 */
-	/*
-	 * Actually disabling the focus CPU check just makes the hang less
-	 * frequent as it makes the interrupt distributon model be more
-	 * like LRU than MRU (the short-term load is more even across CPUs).
-	 * See also the comment in end_level_ioapic_irq().  --macro
-	 */
-
-	/* Enable focus processor (bit==0) */
-	value &= ~APIC_SPIV_FOCUS_DISABLED;
-
-	/*
-	 * Set spurious IRQ vector
-	 */
-	value |= SPURIOUS_APIC_VECTOR;
-	apic_write_around(APIC_SPIV, value);
-
-	/*
-	 * Set up LVT0, LVT1:
-	 *
-	 * set up through-local-APIC on the BP's LINT0. This is not
-	 * strictly necessery in pure symmetric-IO mode, but sometimes
-	 * we delegate interrupts to the 8259A.
-	 */
-	/*
-	 * TODO: set up through-local-APIC from through-I/O-APIC? --macro
-	 */
-	value = apic_read(APIC_LVT0) & APIC_LVT_MASKED;
-	if (!smp_processor_id() && (pic_mode || !value)) {
-		value = APIC_DM_EXTINT;
-		apic_printk(APIC_VERBOSE, "enabled ExtINT on CPU#%d\n",
-				smp_processor_id());
-	} else {
-		value = APIC_DM_EXTINT | APIC_LVT_MASKED;
-		apic_printk(APIC_VERBOSE, "masked ExtINT on CPU#%d\n",
-				smp_processor_id());
-	}
-	apic_write_around(APIC_LVT0, value);
-
-	/*
-	 * only the BP should see the LINT1 NMI signal, obviously.
-	 */
-	if (!smp_processor_id())
-		value = APIC_DM_NMI;
-	else
-		value = APIC_DM_NMI | APIC_LVT_MASKED;
-	if (!integrated)		/* 82489DX */
-		value |= APIC_LVT_LEVEL_TRIGGER;
-	apic_write_around(APIC_LVT1, value);
-
-	if (integrated && !esr_disable) {		/* !82489DX */
-		maxlvt = lapic_get_maxlvt();
-		if (maxlvt > 3)		/* Due to the Pentium erratum 3AP. */
-			apic_write(APIC_ESR, 0);
-		oldvalue = apic_read(APIC_ESR);
-
-		/* enables sending errors */
-		value = ERROR_APIC_VECTOR;
-		apic_write_around(APIC_LVTERR, value);
-		/*
-		 * spec says clear errors after enabling vector.
-		 */
-		if (maxlvt > 3)
-			apic_write(APIC_ESR, 0);
-		value = apic_read(APIC_ESR);
-		if (value != oldvalue)
-			apic_printk(APIC_VERBOSE, "ESR value before enabling "
-				"vector: 0x%08lx  after: 0x%08lx\n",
-				oldvalue, value);
-	} else {
-		if (esr_disable)
-			/*
-			 * Something untraceble is creating bad interrupts on
-			 * secondary quads ... for the moment, just leave the
-			 * ESR disabled - we can't do anything useful with the
-			 * errors anyway - mbligh
-			 */
-			printk(KERN_INFO "Leaving ESR disabled.\n");
-		else
-			printk(KERN_INFO "No ESR for 82489DX.\n");
-	}
-
-	/* Disable the local apic timer */
-	value = apic_read(APIC_LVTT);
-	value |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
-	apic_write_around(APIC_LVTT, value);
-
-	setup_apic_nmi_watchdog(NULL);
-	apic_pm_activate();
-}
-
-/*
- * Detect and initialize APIC
- */
-static int __init detect_init_APIC (void)
-{
-	u32 h, l, features;
-
-	/* Disabled by kernel option? */
-	if (enable_local_apic < 0)
-		return -1;
-
-	switch (boot_cpu_data.x86_vendor) {
-	case X86_VENDOR_AMD:
-		if ((boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model > 1) ||
-		    (boot_cpu_data.x86 == 15))
-			break;
-		goto no_apic;
-	case X86_VENDOR_INTEL:
-		if (boot_cpu_data.x86 == 6 || boot_cpu_data.x86 == 15 ||
-		    (boot_cpu_data.x86 == 5 && cpu_has_apic))
-			break;
-		goto no_apic;
-	default:
-		goto no_apic;
-	}
-
-	if (!cpu_has_apic) {
-		/*
-		 * Over-ride BIOS and try to enable the local APIC only if
-		 * "lapic" specified.
-		 */
-		if (enable_local_apic <= 0) {
-			printk(KERN_INFO "Local APIC disabled by BIOS -- "
-			       "you can enable it with \"lapic\"\n");
-			return -1;
-		}
-		/*
-		 * Some BIOSes disable the local APIC in the APIC_BASE
-		 * MSR. This can only be done in software for Intel P6 or later
-		 * and AMD K7 (Model > 1) or later.
-		 */
-		rdmsr(MSR_IA32_APICBASE, l, h);
-		if (!(l & MSR_IA32_APICBASE_ENABLE)) {
-			printk(KERN_INFO
-			       "Local APIC disabled by BIOS -- reenabling.\n");
-			l &= ~MSR_IA32_APICBASE_BASE;
-			l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
-			wrmsr(MSR_IA32_APICBASE, l, h);
-			enabled_via_apicbase = 1;
-		}
-	}
-	/*
-	 * The APIC feature bit should now be enabled
-	 * in `cpuid'
-	 */
-	features = cpuid_edx(1);
-	if (!(features & (1 << X86_FEATURE_APIC))) {
-		printk(KERN_WARNING "Could not enable APIC!\n");
-		return -1;
-	}
-	set_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
-	mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-
-	/* The BIOS may have set up the APIC at some other address */
-	rdmsr(MSR_IA32_APICBASE, l, h);
-	if (l & MSR_IA32_APICBASE_ENABLE)
-		mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
-
-	if (nmi_watchdog != NMI_NONE && nmi_watchdog != NMI_DISABLED)
-		nmi_watchdog = NMI_LOCAL_APIC;
-
-	printk(KERN_INFO "Found and enabled local APIC!\n");
-
-	apic_pm_activate();
-
-	return 0;
-
-no_apic:
-	printk(KERN_INFO "No local APIC present or hardware disabled\n");
-	return -1;
-}
-
-/**
- * init_apic_mappings - initialize APIC mappings
- */
-void __init init_apic_mappings(void)
-{
-	unsigned long apic_phys;
-
-	/*
-	 * If no local APIC can be found then set up a fake all
-	 * zeroes page to simulate the local APIC and another
-	 * one for the IO-APIC.
-	 */
-	if (!smp_found_config && detect_init_APIC()) {
-		apic_phys = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
-		apic_phys = __pa(apic_phys);
-	} else
-		apic_phys = mp_lapic_addr;
-
-	set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
-	printk(KERN_DEBUG "mapped APIC to %08lx (%08lx)\n", APIC_BASE,
-	       apic_phys);
-
-	/*
-	 * Fetch the APIC ID of the BSP in case we have a
-	 * default configuration (or the MP table is broken).
-	 */
-	if (boot_cpu_physical_apicid == -1U)
-		boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
-
-#ifdef CONFIG_X86_IO_APIC
-	{
-		unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
-		int i;
-
-		for (i = 0; i < nr_ioapics; i++) {
-			if (smp_found_config) {
-				ioapic_phys = mp_ioapics[i].mpc_apicaddr;
-				if (!ioapic_phys) {
-					printk(KERN_ERR
-					       "WARNING: bogus zero IO-APIC "
-					       "address found in MPTABLE, "
-					       "disabling IO/APIC support!\n");
-					smp_found_config = 0;
-					skip_ioapic_setup = 1;
-					goto fake_ioapic_page;
-				}
-			} else {
-fake_ioapic_page:
-				ioapic_phys = (unsigned long)
-					      alloc_bootmem_pages(PAGE_SIZE);
-				ioapic_phys = __pa(ioapic_phys);
-			}
-			set_fixmap_nocache(idx, ioapic_phys);
-			printk(KERN_DEBUG "mapped IOAPIC to %08lx (%08lx)\n",
-			       __fix_to_virt(idx), ioapic_phys);
-			idx++;
-		}
-	}
-#endif
-}
-
-/*
- * This initializes the IO-APIC and APIC hardware if this is
- * a UP kernel.
- */
-int __init APIC_init_uniprocessor (void)
-{
-	if (enable_local_apic < 0)
-		clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
-
-	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);
-		clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
-		return -1;
-	}
-
-	verify_local_APIC();
-
-	connect_bsp_APIC();
-
-	/*
-	 * Hack: In case of kdump, after a crash, kernel might be booting
-	 * on a cpu with non-zero lapic id. But boot_cpu_physical_apicid
-	 * might be zero if read from MP tables. Get it from LAPIC.
-	 */
-#ifdef CONFIG_CRASH_DUMP
-	boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
-#endif
-	phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
-
-	setup_local_APIC();
-
-#ifdef CONFIG_X86_IO_APIC
-	if (smp_found_config)
-		if (!skip_ioapic_setup && nr_ioapics)
-			setup_IO_APIC();
-#endif
-	setup_boot_clock();
-
-	return 0;
-}
-
-/*
- * APIC command line parameters
- */
-static int __init parse_lapic(char *arg)
-{
-	enable_local_apic = 1;
-	return 0;
-}
-early_param("lapic", parse_lapic);
-
-static int __init parse_nolapic(char *arg)
-{
-	enable_local_apic = -1;
-	clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
-	return 0;
-}
-early_param("nolapic", parse_nolapic);
-
-static int __init parse_disable_lapic_timer(char *arg)
-{
-	local_apic_timer_disabled = 1;
-	return 0;
-}
-early_param("nolapic_timer", parse_disable_lapic_timer);
-
-static int __init parse_lapic_timer_c2_ok(char *arg)
-{
-	local_apic_timer_c2_ok = 1;
-	return 0;
-}
-early_param("lapic_timer_c2_ok", parse_lapic_timer_c2_ok);
-
-static int __init apic_set_verbosity(char *str)
-{
-	if (strcmp("debug", str) == 0)
-		apic_verbosity = APIC_DEBUG;
-	else if (strcmp("verbose", str) == 0)
-		apic_verbosity = APIC_VERBOSE;
-	return 1;
-}
-
-__setup("apic=", apic_set_verbosity);
-
-
-/*
- * Local APIC interrupts
- */
-
-/*
- * This interrupt should _never_ happen with our APIC/SMP architecture
- */
-void smp_spurious_interrupt(struct pt_regs *regs)
-{
-	unsigned long v;
-
-	irq_enter();
-	/*
-	 * Check if this really is a spurious interrupt and ACK it
-	 * if it is a vectored one.  Just in case...
-	 * Spurious interrupts should not be ACKed.
-	 */
-	v = apic_read(APIC_ISR + ((SPURIOUS_APIC_VECTOR & ~0x1f) >> 1));
-	if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
-		ack_APIC_irq();
-
-	/* see sw-dev-man vol 3, chapter 7.4.13.5 */
-	printk(KERN_INFO "spurious APIC interrupt on CPU#%d, "
-	       "should never happen.\n", smp_processor_id());
-	irq_exit();
-}
-
-/*
- * This interrupt should never happen with our APIC/SMP architecture
- */
-void smp_error_interrupt(struct pt_regs *regs)
-{
-	unsigned long v, v1;
-
-	irq_enter();
-	/* First tickle the hardware, only then report what went on. -- REW */
-	v = apic_read(APIC_ESR);
-	apic_write(APIC_ESR, 0);
-	v1 = apic_read(APIC_ESR);
-	ack_APIC_irq();
-	atomic_inc(&irq_err_count);
-
-	/* Here is what the APIC error bits mean:
-	   0: Send CS error
-	   1: Receive CS error
-	   2: Send accept error
-	   3: Receive accept error
-	   4: Reserved
-	   5: Send illegal vector
-	   6: Received illegal vector
-	   7: Illegal register address
-	*/
-	printk (KERN_DEBUG "APIC error on CPU%d: %02lx(%02lx)\n",
-		smp_processor_id(), v , v1);
-	irq_exit();
-}
-
-/*
- * Initialize APIC interrupts
- */
-void __init apic_intr_init(void)
-{
-#ifdef CONFIG_SMP
-	smp_intr_init();
-#endif
-	/* self generated IPI for local APIC timer */
-	set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
-
-	/* IPI vectors for APIC spurious and error interrupts */
-	set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
-	set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
-
-	/* thermal monitor LVT interrupt */
-#ifdef CONFIG_X86_MCE_P4THERMAL
-	set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
-#endif
-}
-
-/**
- * connect_bsp_APIC - attach the APIC to the interrupt system
- */
-void __init connect_bsp_APIC(void)
-{
-	if (pic_mode) {
-		/*
-		 * Do not trust the local APIC being empty at bootup.
-		 */
-		clear_local_APIC();
-		/*
-		 * PIC mode, enable APIC mode in the IMCR, i.e.  connect BSP's
-		 * local APIC to INT and NMI lines.
-		 */
-		apic_printk(APIC_VERBOSE, "leaving PIC mode, "
-				"enabling APIC mode.\n");
-		outb(0x70, 0x22);
-		outb(0x01, 0x23);
-	}
-	enable_apic_mode();
-}
-
-/**
- * disconnect_bsp_APIC - detach the APIC from the interrupt system
- * @virt_wire_setup:	indicates, whether virtual wire mode is selected
- *
- * Virtual wire mode is necessary to deliver legacy interrupts even when the
- * APIC is disabled.
- */
-void disconnect_bsp_APIC(int virt_wire_setup)
-{
-	if (pic_mode) {
-		/*
-		 * Put the board back into PIC mode (has an effect only on
-		 * certain older boards).  Note that APIC interrupts, including
-		 * IPIs, won't work beyond this point!  The only exception are
-		 * INIT IPIs.
-		 */
-		apic_printk(APIC_VERBOSE, "disabling APIC mode, "
-				"entering PIC mode.\n");
-		outb(0x70, 0x22);
-		outb(0x00, 0x23);
-	} else {
-		/* Go back to Virtual Wire compatibility mode */
-		unsigned long value;
-
-		/* For the spurious interrupt use vector F, and enable it */
-		value = apic_read(APIC_SPIV);
-		value &= ~APIC_VECTOR_MASK;
-		value |= APIC_SPIV_APIC_ENABLED;
-		value |= 0xf;
-		apic_write_around(APIC_SPIV, value);
-
-		if (!virt_wire_setup) {
-			/*
-			 * For LVT0 make it edge triggered, active high,
-			 * external and enabled
-			 */
-			value = apic_read(APIC_LVT0);
-			value &= ~(APIC_MODE_MASK | APIC_SEND_PENDING |
-				APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |
-				APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED );
-			value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING;
-			value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_EXTINT);
-			apic_write_around(APIC_LVT0, value);
-		} else {
-			/* Disable LVT0 */
-			apic_write_around(APIC_LVT0, APIC_LVT_MASKED);
-		}
-
-		/*
-		 * For LVT1 make it edge triggered, active high, nmi and
-		 * enabled
-		 */
-		value = apic_read(APIC_LVT1);
-		value &= ~(
-			APIC_MODE_MASK | APIC_SEND_PENDING |
-			APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |
-			APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED);
-		value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING;
-		value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_NMI);
-		apic_write_around(APIC_LVT1, value);
-	}
-}
-
-/*
- * Power management
- */
-#ifdef CONFIG_PM
-
-static struct {
-	int active;
-	/* r/w apic fields */
-	unsigned int apic_id;
-	unsigned int apic_taskpri;
-	unsigned int apic_ldr;
-	unsigned int apic_dfr;
-	unsigned int apic_spiv;
-	unsigned int apic_lvtt;
-	unsigned int apic_lvtpc;
-	unsigned int apic_lvt0;
-	unsigned int apic_lvt1;
-	unsigned int apic_lvterr;
-	unsigned int apic_tmict;
-	unsigned int apic_tdcr;
-	unsigned int apic_thmr;
-} apic_pm_state;
-
-static int lapic_suspend(struct sys_device *dev, pm_message_t state)
-{
-	unsigned long flags;
-	int maxlvt;
-
-	if (!apic_pm_state.active)
-		return 0;
-
-	maxlvt = lapic_get_maxlvt();
-
-	apic_pm_state.apic_id = apic_read(APIC_ID);
-	apic_pm_state.apic_taskpri = apic_read(APIC_TASKPRI);
-	apic_pm_state.apic_ldr = apic_read(APIC_LDR);
-	apic_pm_state.apic_dfr = apic_read(APIC_DFR);
-	apic_pm_state.apic_spiv = apic_read(APIC_SPIV);
-	apic_pm_state.apic_lvtt = apic_read(APIC_LVTT);
-	if (maxlvt >= 4)
-		apic_pm_state.apic_lvtpc = apic_read(APIC_LVTPC);
-	apic_pm_state.apic_lvt0 = apic_read(APIC_LVT0);
-	apic_pm_state.apic_lvt1 = apic_read(APIC_LVT1);
-	apic_pm_state.apic_lvterr = apic_read(APIC_LVTERR);
-	apic_pm_state.apic_tmict = apic_read(APIC_TMICT);
-	apic_pm_state.apic_tdcr = apic_read(APIC_TDCR);
-#ifdef CONFIG_X86_MCE_P4THERMAL
-	if (maxlvt >= 5)
-		apic_pm_state.apic_thmr = apic_read(APIC_LVTTHMR);
-#endif
-
-	local_irq_save(flags);
-	disable_local_APIC();
-	local_irq_restore(flags);
-	return 0;
-}
-
-static int lapic_resume(struct sys_device *dev)
-{
-	unsigned int l, h;
-	unsigned long flags;
-	int maxlvt;
-
-	if (!apic_pm_state.active)
-		return 0;
-
-	maxlvt = lapic_get_maxlvt();
-
-	local_irq_save(flags);
-
-	/*
-	 * Make sure the APICBASE points to the right address
-	 *
-	 * FIXME! This will be wrong if we ever support suspend on
-	 * SMP! We'll need to do this as part of the CPU restore!
-	 */
-	rdmsr(MSR_IA32_APICBASE, l, h);
-	l &= ~MSR_IA32_APICBASE_BASE;
-	l |= MSR_IA32_APICBASE_ENABLE | mp_lapic_addr;
-	wrmsr(MSR_IA32_APICBASE, l, h);
-
-	apic_write(APIC_LVTERR, ERROR_APIC_VECTOR | APIC_LVT_MASKED);
-	apic_write(APIC_ID, apic_pm_state.apic_id);
-	apic_write(APIC_DFR, apic_pm_state.apic_dfr);
-	apic_write(APIC_LDR, apic_pm_state.apic_ldr);
-	apic_write(APIC_TASKPRI, apic_pm_state.apic_taskpri);
-	apic_write(APIC_SPIV, apic_pm_state.apic_spiv);
-	apic_write(APIC_LVT0, apic_pm_state.apic_lvt0);
-	apic_write(APIC_LVT1, apic_pm_state.apic_lvt1);
-#ifdef CONFIG_X86_MCE_P4THERMAL
-	if (maxlvt >= 5)
-		apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr);
-#endif
-	if (maxlvt >= 4)
-		apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);
-	apic_write(APIC_LVTT, apic_pm_state.apic_lvtt);
-	apic_write(APIC_TDCR, apic_pm_state.apic_tdcr);
-	apic_write(APIC_TMICT, apic_pm_state.apic_tmict);
-	apic_write(APIC_ESR, 0);
-	apic_read(APIC_ESR);
-	apic_write(APIC_LVTERR, apic_pm_state.apic_lvterr);
-	apic_write(APIC_ESR, 0);
-	apic_read(APIC_ESR);
-	local_irq_restore(flags);
-	return 0;
-}
-
-/*
- * This device has no shutdown method - fully functioning local APICs
- * are needed on every CPU up until machine_halt/restart/poweroff.
- */
-
-static struct sysdev_class lapic_sysclass = {
-	set_kset_name("lapic"),
-	.resume		= lapic_resume,
-	.suspend	= lapic_suspend,
-};
-
-static struct sys_device device_lapic = {
-	.id	= 0,
-	.cls	= &lapic_sysclass,
-};
-
-static void __devinit apic_pm_activate(void)
-{
-	apic_pm_state.active = 1;
-}
-
-static int __init init_lapic_sysfs(void)
-{
-	int error;
-
-	if (!cpu_has_apic)
-		return 0;
-	/* XXX: remove suspend/resume procs if !apic_pm_state.active? */
-
-	error = sysdev_class_register(&lapic_sysclass);
-	if (!error)
-		error = sysdev_register(&device_lapic);
-	return error;
-}
-device_initcall(init_lapic_sysfs);
-
-#else	/* CONFIG_PM */
-
-static void apic_pm_activate(void) { }
-
-#endif	/* CONFIG_PM */