x86: rename apic_32.c and apic_64.c to apic.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 1 insertions, 2313 deletions

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 7264f9c3af8f..45cecc59d894 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -60,7 +60,7 @@ obj-$(CONFIG_X86_32_SMP)	+= smpcommon.o
 obj-$(CONFIG_X86_64_SMP)	+= tsc_sync.o smpcommon.o
 obj-$(CONFIG_X86_TRAMPOLINE)	+= trampoline_$(BITS).o
 obj-$(CONFIG_X86_MPPARSE)	+= mpparse.o
-obj-$(CONFIG_X86_LOCAL_APIC)	+= apic_$(BITS).o nmi.o
+obj-$(CONFIG_X86_LOCAL_APIC)	+= apic.o nmi.o
 obj-$(CONFIG_X86_IO_APIC)	+= io_apic.o
 obj-$(CONFIG_X86_REBOOTFIXUPS)	+= reboot_fixups_32.o
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic.c
index 6e99af5ce678..6e99af5ce678 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic.c
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
deleted file mode 100644
index 0b11d6e3f091..000000000000
--- a/arch/x86/kernel/apic_32.c
+++ /dev/null
@@ -1,2312 +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/ioport.h>
-#include <linux/cpu.h>
-#include <linux/clockchips.h>
-#include <linux/acpi_pmtmr.h>
-#include <linux/module.h>
-#include <linux/dmi.h>
-#include <linux/dmar.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/pgalloc.h>
-#include <asm/i8253.h>
-#include <asm/nmi.h>
-#include <asm/idle.h>
-#include <asm/proto.h>
-#include <asm/timex.h>
-#include <asm/apic.h>
-#include <asm/i8259.h>
-
-#include <mach_apic.h>
-#include <mach_apicdef.h>
-#include <mach_ipi.h>
-
-/*
- * Sanity check
- */
-#if ((SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F)
-# error SPURIOUS_APIC_VECTOR definition error
-#endif
-
-#ifdef CONFIG_X86_32
-/*
- * Knob to control our willingness to enable the local APIC.
- *
- * +1=force-enable
- */
-static int force_enable_local_apic;
-/*
- * APIC command line parameters
- */
-static int __init parse_lapic(char *arg)
-{
-	force_enable_local_apic = 1;
-	return 0;
-}
-early_param("lapic", parse_lapic);
-/* Local APIC was disabled by the BIOS and enabled by the kernel */
-static int enabled_via_apicbase;
-
-#endif
-
-#ifdef CONFIG_X86_64
-static int apic_calibrate_pmtmr __initdata;
-static __init int setup_apicpmtimer(char *s)
-{
-	apic_calibrate_pmtmr = 1;
-	notsc_setup(NULL);
-	return 0;
-}
-__setup("apicpmtimer", setup_apicpmtimer);
-#endif
-
-#ifdef CONFIG_X86_64
-#define HAVE_X2APIC
-#endif
-
-#ifdef HAVE_X2APIC
-int x2apic;
-/* x2apic enabled before OS handover */
-int x2apic_preenabled;
-int disable_x2apic;
-static __init int setup_nox2apic(char *str)
-{
-	disable_x2apic = 1;
-	setup_clear_cpu_cap(X86_FEATURE_X2APIC);
-	return 0;
-}
-early_param("nox2apic", setup_nox2apic);
-#endif
-
-unsigned long mp_lapic_addr;
-int disable_apic;
-/* Disable local APIC timer from the kernel commandline or via dmi quirk */
-static int disable_apic_timer __cpuinitdata;
-/* Local APIC timer works in C2 */
-int local_apic_timer_c2_ok;
-EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
-
-int first_system_vector = 0xfe;
-
-char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
-
-/*
- * Debug level, exported for io_apic.c
- */
-unsigned int apic_verbosity;
-
-int pic_mode;
-
-/* Have we found an MP table */
-int smp_found_config;
-
-static struct resource lapic_resource = {
-	.name = "Local APIC",
-	.flags = IORESOURCE_MEM | IORESOURCE_BUSY,
-};
-
-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);
-
-static unsigned long apic_phys;
-
-/*
- * 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 separate chip
- */
-static inline int lapic_is_integrated(void)
-{
-#ifdef CONFIG_X86_64
-	return 1;
-#else
-	return APIC_INTEGRATED(lapic_get_version());
-#endif
-}
-
-/*
- * 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;
-}
-
-/*
- * Paravirt kernels also might be using these below ops. So we still
- * use generic apic_read()/apic_write(), which might be pointing to different
- * ops in PARAVIRT case.
- */
-void xapic_wait_icr_idle(void)
-{
-	while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
-		cpu_relax();
-}
-
-u32 safe_xapic_wait_icr_idle(void)
-{
-	u32 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;
-}
-
-void xapic_icr_write(u32 low, u32 id)
-{
-	apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(id));
-	apic_write(APIC_ICR, low);
-}
-
-u64 xapic_icr_read(void)
-{
-	u32 icr1, icr2;
-
-	icr2 = apic_read(APIC_ICR2);
-	icr1 = apic_read(APIC_ICR);
-
-	return icr1 | ((u64)icr2 << 32);
-}
-
-static struct apic_ops xapic_ops = {
-	.read = native_apic_mem_read,
-	.write = native_apic_mem_write,
-	.icr_read = xapic_icr_read,
-	.icr_write = xapic_icr_write,
-	.wait_icr_idle = xapic_wait_icr_idle,
-	.safe_wait_icr_idle = safe_xapic_wait_icr_idle,
-};
-
-struct apic_ops __read_mostly *apic_ops = &xapic_ops;
-EXPORT_SYMBOL_GPL(apic_ops);
-
-#ifdef HAVE_X2APIC
-static void x2apic_wait_icr_idle(void)
-{
-	/* no need to wait for icr idle in x2apic */
-	return;
-}
-
-static u32 safe_x2apic_wait_icr_idle(void)
-{
-	/* no need to wait for icr idle in x2apic */
-	return 0;
-}
-
-void x2apic_icr_write(u32 low, u32 id)
-{
-	wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
-}
-
-u64 x2apic_icr_read(void)
-{
-	unsigned long val;
-
-	rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
-	return val;
-}
-
-static struct apic_ops x2apic_ops = {
-	.read = native_apic_msr_read,
-	.write = native_apic_msr_write,
-	.icr_read = x2apic_icr_read,
-	.icr_write = x2apic_icr_write,
-	.wait_icr_idle = x2apic_wait_icr_idle,
-	.safe_wait_icr_idle = safe_x2apic_wait_icr_idle,
-};
-#endif
-
-/**
- * enable_NMI_through_LVT0 - enable NMI through local vector table 0
- */
-void __cpuinit enable_NMI_through_LVT0(void)
-{
-	unsigned int v;
-
-	/* unmask and set to NMI */
-	v = APIC_DM_NMI;
-
-	/* Level triggered for 82489DX (32bit mode) */
-	if (!lapic_is_integrated())
-		v |= APIC_LVT_LEVEL_TRIGGER;
-
-	apic_write(APIC_LVT0, v);
-}
-
-#ifdef CONFIG_X86_32
-/**
- * get_physical_broadcast - Get number of physical broadcast IDs
- */
-int get_physical_broadcast(void)
-{
-	return modern_apic() ? 0xff : 0xf;
-}
-#endif
-
-/**
- * lapic_get_maxlvt - get the maximum number of local vector table entries
- */
-int lapic_get_maxlvt(void)
-{
-	unsigned int v;
-
-	v = apic_read(APIC_LVR);
-	/*
-	 * - we always have APIC integrated on 64bit mode
-	 * - 82489DXs do not report # of LVT entries
-	 */
-	return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
-}
-
-/*
- * Local APIC timer
- */
-
-/* Clock divisor */
-#ifdef CONFG_X86_64
-#define APIC_DIVISOR 1
-#else
-#define APIC_DIVISOR 16
-#endif
-
-/*
- * 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(APIC_LVTT, lvtt_value);
-
-	/*
-	 * Divide PICLK by 16
-	 */
-	tmp_value = apic_read(APIC_TDCR);
-	apic_write(APIC_TDCR,
-		(tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) |
-		APIC_TDR_DIV_16);
-
-	if (!oneshot)
-		apic_write(APIC_TMICT, clocks / APIC_DIVISOR);
-}
-
-/*
- * Setup extended LVT, AMD specific (K8, family 10h)
- *
- * Vector mappings are hard coded. On K8 only offset 0 (APIC500) and
- * MCE interrupts are supported. Thus MCE offset must be set to 0.
- *
- * If mask=1, the LVT entry does not generate interrupts while mask=0
- * enables the vector. See also the BKDGs.
- */
-
-#define APIC_EILVT_LVTOFF_MCE 0
-#define APIC_EILVT_LVTOFF_IBS 1
-
-static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
-{
-	unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
-	unsigned int  v   = (mask << 16) | (msg_type << 8) | vector;
-
-	apic_write(reg, v);
-}
-
-u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask)
-{
-	setup_APIC_eilvt(APIC_EILVT_LVTOFF_MCE, vector, msg_type, mask);
-	return APIC_EILVT_LVTOFF_MCE;
-}
-
-u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask)
-{
-	setup_APIC_eilvt(APIC_EILVT_LVTOFF_IBS, vector, msg_type, mask);
-	return APIC_EILVT_LVTOFF_IBS;
-}
-EXPORT_SYMBOL_GPL(setup_APIC_eilvt_ibs);
-
-/*
- * Program the next event, relative to now
- */
-static int lapic_next_event(unsigned long delta,
-			    struct clock_event_device *evt)
-{
-	apic_write(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 as dummy for broadcast ? */
-	if (evt->features & CLOCK_EVT_FEAT_DUMMY)
-		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(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 __cpuinit 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);
-}
-
-#ifdef CONFIG_X86_64
-/*
- * In this function we calibrate APIC bus clocks to the external
- * timer. Unfortunately we cannot use jiffies and the timer irq
- * to calibrate, since some later bootup code depends on getting
- * the first irq? Ugh.
- *
- * 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.
- * And we want to have irqs off anyways, no accidental
- * APIC irq that way.
- */
-
-#define TICK_COUNT 100000000
-
-static int __init calibrate_APIC_clock(void)
-{
-	unsigned apic, apic_start;
-	unsigned long tsc, tsc_start;
-	int result;
-
-	local_irq_disable();
-
-	/*
-	 * Put whatever arbitrary (but long enough) timeout
-	 * value into the APIC clock, we just want to get the
-	 * counter running for calibration.
-	 *
-	 * No interrupt enable !
-	 */
-	__setup_APIC_LVTT(250000000, 0, 0);
-
-	apic_start = apic_read(APIC_TMCCT);
-#ifdef CONFIG_X86_PM_TIMER
-	if (apic_calibrate_pmtmr && pmtmr_ioport) {
-		pmtimer_wait(5000);  /* 5ms wait */
-		apic = apic_read(APIC_TMCCT);
-		result = (apic_start - apic) * 1000L / 5;
-	} else
-#endif
-	{
-		rdtscll(tsc_start);
-
-		do {
-			apic = apic_read(APIC_TMCCT);
-			rdtscll(tsc);
-		} while ((tsc - tsc_start) < TICK_COUNT &&
-				(apic_start - apic) < TICK_COUNT);
-
-		result = (apic_start - apic) * 1000L * tsc_khz /
-					(tsc - tsc_start);
-	}
-
-	local_irq_enable();
-
-	printk(KERN_DEBUG "APIC timer calibration result %d\n", result);
-
-	printk(KERN_INFO "Detected %d.%03d MHz APIC timer.\n",
-		result / 1000 / 1000, result / 1000 % 1000);
-
-	/* Calculate the scaled math multiplication factor */
-	lapic_clockevent.mult = div_sc(result, NSEC_PER_SEC,
-				       lapic_clockevent.shift);
-	lapic_clockevent.max_delta_ns =
-		clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
-	lapic_clockevent.min_delta_ns =
-		clockevent_delta2ns(0xF, &lapic_clockevent);
-
-	calibration_result = (result * APIC_DIVISOR) / HZ;
-
-	/*
-	 * Do a sanity check on the APIC calibration result
-	 */
-	if (calibration_result < (1000000 / HZ)) {
-		printk(KERN_WARNING
-			"APIC frequency too slow, disabling apic timer\n");
-		return -1;
-	}
-
-	return 0;
-}
-
-#else
-/*
- * 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;
-	}
-}
-
-static int __init calibrate_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;
-
-	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,
-				       lapic_clockevent.shift);
-	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));
-
-	/*
-	 * Do a sanity check on the APIC calibration result
-	 */
-	if (calibration_result < (1000000 / HZ)) {
-		local_irq_enable();
-		printk(KERN_WARNING
-		       "APIC frequency too slow, disabling apic timer\n");
-		return -1;
-	}
-
-	levt->features &= ~CLOCK_EVT_FEAT_DUMMY;
-
-	/* 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
-			levt->features |= CLOCK_EVT_FEAT_DUMMY;
-	} else
-		local_irq_enable();
-
-	if (levt->features & CLOCK_EVT_FEAT_DUMMY) {
-		printk(KERN_WARNING
-		       "APIC timer disabled due to verification failure.\n");
-			return -1;
-	}
-
-	return 0;
-}
-
-#endif
-
-/*
- * Setup the boot APIC
- *
- * Calibrate and verify the result.
- */
-void __init setup_boot_APIC_clock(void)
-{
-	/*
-	 * 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 (disable_apic_timer) {
-		printk(KERN_INFO "Disabling APIC timer\n");
-		/* No broadcast on UP ! */
-		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()) {
-		/* No broadcast on UP ! */
-		if (num_possible_cpus() > 1)
-			setup_APIC_timer();
-		return;
-	}
-
-	/*
-	 * 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=%d!\n", nmi_watchdog);
-
-	/* Setup the lapic or request the broadcast */
-	setup_APIC_timer();
-}
-
-void __cpuinit 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;
-	}
-
-	/*
-	 * the NMI deadlock-detector uses this.
-	 */
-#ifdef CONFIG_X86_64
-	add_pda(apic_timer_irqs, 1);
-#else
-	per_cpu(irq_stat, cpu).apic_timer_irqs++;
-#endif
-
-	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 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.
-	 */
-#ifdef CONFIG_X86_64
-	exit_idle();
-#endif
-	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;
-	u32 v;
-
-	/* APIC hasn't been mapped yet */
-	if (!apic_phys)
-		return;
-
-	maxlvt = lapic_get_maxlvt();
-	/*
-	 * 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(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(APIC_LVTT, v | APIC_LVT_MASKED);
-	v = apic_read(APIC_LVT0);
-	apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
-	v = apic_read(APIC_LVT1);
-	apic_write(APIC_LVT1, v | APIC_LVT_MASKED);
-	if (maxlvt >= 4) {
-		v = apic_read(APIC_LVTPC);
-		apic_write(APIC_LVTPC, v | APIC_LVT_MASKED);
-	}
-
-	/* lets not touch this if we didn't frob it */
-#if defined(CONFIG_X86_MCE_P4THERMAL) || defined(X86_MCE_INTEL)
-	if (maxlvt >= 5) {
-		v = apic_read(APIC_LVTTHMR);
-		apic_write(APIC_LVTTHMR, v | APIC_LVT_MASKED);
-	}
-#endif
-	/*
-	 * Clean APIC state for other OSs:
-	 */
-	apic_write(APIC_LVTT, APIC_LVT_MASKED);
-	apic_write(APIC_LVT0, APIC_LVT_MASKED);
-	apic_write(APIC_LVT1, APIC_LVT_MASKED);
-	if (maxlvt >= 3)
-		apic_write(APIC_LVTERR, APIC_LVT_MASKED);
-	if (maxlvt >= 4)
-		apic_write(APIC_LVTPC, APIC_LVT_MASKED);
-
-	/* 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 int value;
-
-	clear_local_APIC();
-
-	/*
-	 * Disable APIC (implies clearing of registers
-	 * for 82489DX!).
-	 */
-	value = apic_read(APIC_SPIV);
-	value &= ~APIC_SPIV_APIC_ENABLED;
-	apic_write(APIC_SPIV, value);
-
-#ifdef CONFIG_X86_32
-	/*
-	 * 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);
-	}
-#endif
-}
-
-/*
- * 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);
-
-#ifdef CONFIG_X86_32
-	if (!enabled_via_apicbase)
-		clear_local_APIC();
-	else
-#endif
-		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);
-	apic_write(APIC_ID, reg0 ^ APIC_ID_MASK);
-	reg1 = apic_read(APIC_ID);
-	apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg1);
-	apic_write(APIC_ID, reg0);
-	if (reg1 != (reg0 ^ APIC_ID_MASK))
-		return 0;
-
-	/*
-	 * 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() || boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
-		return;
-
-	/*
-	 * Wait for idle.
-	 */
-	apic_wait_icr_idle();
-
-	apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
-	apic_write(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 int 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;
-
-#ifdef CONFIG_X86_32
-	/* 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
-#endif
-		value |= APIC_SPIV_FOCUS_DISABLED;
-	value |= SPURIOUS_APIC_VECTOR;
-	apic_write(APIC_SPIV, value);
-
-	/*
-	 * Set up the virtual wire mode.
-	 */
-	apic_write