1 files changed, 0 insertions, 553 deletions
diff --git a/arch/i386/kernel/hpet_32.c b/arch/i386/kernel/hpet_32.c
deleted file mode 100644
index 533d4932bc7..00000000000
--- a/arch/i386/kernel/hpet_32.c
+++ /dev/null
@@ -1,553 +0,0 @@
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <linux/errno.h>
-#include <linux/hpet.h>
-#include <linux/init.h>
-#include <linux/sysdev.h>
-#include <linux/pm.h>
-#include <linux/delay.h>
-
-#include <asm/hpet.h>
-#include <asm/io.h>
-
-extern struct clock_event_device *global_clock_event;
-
-#define HPET_MASK	CLOCKSOURCE_MASK(32)
-#define HPET_SHIFT	22
-
-/* FSEC = 10^-15 NSEC = 10^-9 */
-#define FSEC_PER_NSEC	1000000
-
-/*
- * HPET address is set in acpi/boot.c, when an ACPI entry exists
- */
-unsigned long hpet_address;
-static void __iomem * hpet_virt_address;
-
-static inline unsigned long hpet_readl(unsigned long a)
-{
-	return readl(hpet_virt_address + a);
-}
-
-static inline void hpet_writel(unsigned long d, unsigned long a)
-{
-	writel(d, hpet_virt_address + a);
-}
-
-/*
- * HPET command line enable / disable
- */
-static int boot_hpet_disable;
-
-static int __init hpet_setup(char* str)
-{
-	if (str) {
-		if (!strncmp("disable", str, 7))
-			boot_hpet_disable = 1;
-	}
-	return 1;
-}
-__setup("hpet=", hpet_setup);
-
-static inline int is_hpet_capable(void)
-{
-	return (!boot_hpet_disable && hpet_address);
-}
-
-/*
- * HPET timer interrupt enable / disable
- */
-static int hpet_legacy_int_enabled;
-
-/**
- * is_hpet_enabled - check whether the hpet timer interrupt is enabled
- */
-int is_hpet_enabled(void)
-{
-	return is_hpet_capable() && hpet_legacy_int_enabled;
-}
-
-/*
- * When the hpet driver (/dev/hpet) is enabled, we need to reserve
- * timer 0 and timer 1 in case of RTC emulation.
- */
-#ifdef CONFIG_HPET
-static void hpet_reserve_platform_timers(unsigned long id)
-{
-	struct hpet __iomem *hpet = hpet_virt_address;
-	struct hpet_timer __iomem *timer = &hpet->hpet_timers[2];
-	unsigned int nrtimers, i;
-	struct hpet_data hd;
-
-	nrtimers = ((id & HPET_ID_NUMBER) >> HPET_ID_NUMBER_SHIFT) + 1;
-
-	memset(&hd, 0, sizeof (hd));
-	hd.hd_phys_address = hpet_address;
-	hd.hd_address = hpet_virt_address;
-	hd.hd_nirqs = nrtimers;
-	hd.hd_flags = HPET_DATA_PLATFORM;
-	hpet_reserve_timer(&hd, 0);
-
-#ifdef CONFIG_HPET_EMULATE_RTC
-	hpet_reserve_timer(&hd, 1);
-#endif
-
-	hd.hd_irq[0] = HPET_LEGACY_8254;
-	hd.hd_irq[1] = HPET_LEGACY_RTC;
-
-	for (i = 2; i < nrtimers; timer++, i++)
-		hd.hd_irq[i] = (timer->hpet_config & Tn_INT_ROUTE_CNF_MASK) >>
-			Tn_INT_ROUTE_CNF_SHIFT;
-
-	hpet_alloc(&hd);
-
-}
-#else
-static void hpet_reserve_platform_timers(unsigned long id) { }
-#endif
-
-/*
- * Common hpet info
- */
-static unsigned long hpet_period;
-
-static void hpet_set_mode(enum clock_event_mode mode,
-			  struct clock_event_device *evt);
-static int hpet_next_event(unsigned long delta,
-			   struct clock_event_device *evt);
-
-/*
- * The hpet clock event device
- */
-static struct clock_event_device hpet_clockevent = {
-	.name		= "hpet",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.set_mode	= hpet_set_mode,
-	.set_next_event = hpet_next_event,
-	.shift		= 32,
-	.irq		= 0,
-};
-
-static void hpet_start_counter(void)
-{
-	unsigned long cfg = hpet_readl(HPET_CFG);
-
-	cfg &= ~HPET_CFG_ENABLE;
-	hpet_writel(cfg, HPET_CFG);
-	hpet_writel(0, HPET_COUNTER);
-	hpet_writel(0, HPET_COUNTER + 4);
-	cfg |= HPET_CFG_ENABLE;
-	hpet_writel(cfg, HPET_CFG);
-}
-
-static void hpet_enable_int(void)
-{
-	unsigned long cfg = hpet_readl(HPET_CFG);
-
-	cfg |= HPET_CFG_LEGACY;
-	hpet_writel(cfg, HPET_CFG);
-	hpet_legacy_int_enabled = 1;
-}
-
-static void hpet_set_mode(enum clock_event_mode mode,
-			  struct clock_event_device *evt)
-{
-	unsigned long cfg, cmp, now;
-	uint64_t delta;
-
-	switch(mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * hpet_clockevent.mult;
-		delta >>= hpet_clockevent.shift;
-		now = hpet_readl(HPET_COUNTER);
-		cmp = now + (unsigned long) delta;
-		cfg = hpet_readl(HPET_T0_CFG);
-		cfg |= HPET_TN_ENABLE | HPET_TN_PERIODIC |
-		       HPET_TN_SETVAL | HPET_TN_32BIT;
-		hpet_writel(cfg, HPET_T0_CFG);
-		/*
-		 * The first write after writing TN_SETVAL to the
-		 * config register sets the counter value, the second
-		 * write sets the period.
-		 */
-		hpet_writel(cmp, HPET_T0_CMP);
-		udelay(1);
-		hpet_writel((unsigned long) delta, HPET_T0_CMP);
-		break;
-
-	case CLOCK_EVT_MODE_ONESHOT:
-		cfg = hpet_readl(HPET_T0_CFG);
-		cfg &= ~HPET_TN_PERIODIC;
-		cfg |= HPET_TN_ENABLE | HPET_TN_32BIT;
-		hpet_writel(cfg, HPET_T0_CFG);
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		cfg = hpet_readl(HPET_T0_CFG);
-		cfg &= ~HPET_TN_ENABLE;
-		hpet_writel(cfg, HPET_T0_CFG);
-		break;
-
-	case CLOCK_EVT_MODE_RESUME:
-		hpet_enable_int();
-		break;
-	}
-}
-
-static int hpet_next_event(unsigned long delta,
-			   struct clock_event_device *evt)
-{
-	unsigned long cnt;
-
-	cnt = hpet_readl(HPET_COUNTER);
-	cnt += delta;
-	hpet_writel(cnt, HPET_T0_CMP);
-
-	return ((long)(hpet_readl(HPET_COUNTER) - cnt ) > 0) ? -ETIME : 0;
-}
-
-/*
- * Clock source related code
- */
-static cycle_t read_hpet(void)
-{
-	return (cycle_t)hpet_readl(HPET_COUNTER);
-}
-
-static struct clocksource clocksource_hpet = {
-	.name		= "hpet",
-	.rating		= 250,
-	.read		= read_hpet,
-	.mask		= HPET_MASK,
-	.shift		= HPET_SHIFT,
-	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
-	.resume		= hpet_start_counter,
-};
-
-/*
- * Try to setup the HPET timer
- */
-int __init hpet_enable(void)
-{
-	unsigned long id;
-	uint64_t hpet_freq;
-	u64 tmp, start, now;
-	cycle_t t1;
-
-	if (!is_hpet_capable())
-		return 0;
-
-	hpet_virt_address = ioremap_nocache(hpet_address, HPET_MMAP_SIZE);
-
-	/*
-	 * Read the period and check for a sane value:
-	 */
-	hpet_period = hpet_readl(HPET_PERIOD);
-	if (hpet_period < HPET_MIN_PERIOD || hpet_period > HPET_MAX_PERIOD)
-		goto out_nohpet;
-
-	/*
-	 * The period is a femto seconds value. We need to calculate the
-	 * scaled math multiplication factor for nanosecond to hpet tick
-	 * conversion.
-	 */
-	hpet_freq = 1000000000000000ULL;
-	do_div(hpet_freq, hpet_period);
-	hpet_clockevent.mult = div_sc((unsigned long) hpet_freq,
-				      NSEC_PER_SEC, 32);
-	/* Calculate the min / max delta */
-	hpet_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF,
-							   &hpet_clockevent);
-	hpet_clockevent.min_delta_ns = clockevent_delta2ns(0x30,
-							   &hpet_clockevent);
-
-	/*
-	 * Read the HPET ID register to retrieve the IRQ routing
-	 * information and the number of channels
-	 */
-	id = hpet_readl(HPET_ID);
-
-#ifdef CONFIG_HPET_EMULATE_RTC
-	/*
-	 * The legacy routing mode needs at least two channels, tick timer
-	 * and the rtc emulation channel.
-	 */
-	if (!(id & HPET_ID_NUMBER))
-		goto out_nohpet;
-#endif
-
-	/* Start the counter */
-	hpet_start_counter();
-
-	/* Verify whether hpet counter works */
-	t1 = read_hpet();
-	rdtscll(start);
-
-	/*
-	 * We don't know the TSC frequency yet, but waiting for
-	 * 200000 TSC cycles is safe:
-	 * 4 GHz == 50us
-	 * 1 GHz == 200us
-	 */
-	do {
-		rep_nop();
-		rdtscll(now);
-	} while ((now - start) < 200000UL);
-
-	if (t1 == read_hpet()) {
-		printk(KERN_WARNING
-		       "HPET counter not counting. HPET disabled\n");
-		goto out_nohpet;
-	}
-
-	/* Initialize and register HPET clocksource
-	 *
-	 * hpet period is in femto seconds per cycle
-	 * so we need to convert this to ns/cyc units
-	 * aproximated by mult/2^shift
-	 *
-	 *  fsec/cyc * 1nsec/1000000fsec = nsec/cyc = mult/2^shift
-	 *  fsec/cyc * 1ns/1000000fsec * 2^shift = mult
-	 *  fsec/cyc * 2^shift * 1nsec/1000000fsec = mult
-	 *  (fsec/cyc << shift)/1000000 = mult
-	 *  (hpet_period << shift)/FSEC_PER_NSEC = mult
-	 */
-	tmp = (u64)hpet_period << HPET_SHIFT;
-	do_div(tmp, FSEC_PER_NSEC);
-	clocksource_hpet.mult = (u32)tmp;
-
-	clocksource_register(&clocksource_hpet);
-
-	if (id & HPET_ID_LEGSUP) {
-		hpet_enable_int();
-		hpet_reserve_platform_timers(id);
-		/*
-		 * Start hpet with the boot cpu mask and make it
-		 * global after the IO_APIC has been initialized.
-		 */
-		hpet_clockevent.cpumask = cpumask_of_cpu(smp_processor_id());
-		clockevents_register_device(&hpet_clockevent);
-		global_clock_event = &hpet_clockevent;
-		return 1;
-	}
-	return 0;
-
-out_nohpet:
-	iounmap(hpet_virt_address);
-	hpet_virt_address = NULL;
-	boot_hpet_disable = 1;
-	return 0;
-}
-
-
-#ifdef CONFIG_HPET_EMULATE_RTC
-
-/* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET
- * is enabled, we support RTC interrupt functionality in software.
- * RTC has 3 kinds of interrupts:
- * 1) Update Interrupt - generate an interrupt, every sec, when RTC clock
- *    is updated
- * 2) Alarm Interrupt - generate an interrupt at a specific time of day
- * 3) Periodic Interrupt - generate periodic interrupt, with frequencies
- *    2Hz-8192Hz (2Hz-64Hz for non-root user) (all freqs in powers of 2)
- * (1) and (2) above are implemented using polling at a frequency of
- * 64 Hz. The exact frequency is a tradeoff between accuracy and interrupt
- * overhead. (DEFAULT_RTC_INT_FREQ)
- * For (3), we use interrupts at 64Hz or user specified periodic
- * frequency, whichever is higher.
- */
-#include <linux/mc146818rtc.h>
-#include <linux/rtc.h>
-
-#define DEFAULT_RTC_INT_FREQ	64
-#define DEFAULT_RTC_SHIFT	6
-#define RTC_NUM_INTS		1
-
-static unsigned long hpet_rtc_flags;
-static unsigned long hpet_prev_update_sec;
-static struct rtc_time hpet_alarm_time;
-static unsigned long hpet_pie_count;
-static unsigned long hpet_t1_cmp;
-static unsigned long hpet_default_delta;
-static unsigned long hpet_pie_delta;
-static unsigned long hpet_pie_limit;
-
-/*
- * Timer 1 for RTC emulation. We use one shot mode, as periodic mode
- * is not supported by all HPET implementations for timer 1.
- *
- * hpet_rtc_timer_init() is called when the rtc is initialized.
- */
-int hpet_rtc_timer_init(void)
-{
-	unsigned long cfg, cnt, delta, flags;
-
-	if (!is_hpet_enabled())
-		return 0;
-
-	if (!hpet_default_delta) {
-		uint64_t clc;
-
-		clc = (uint64_t) hpet_clockevent.mult * NSEC_PER_SEC;
-		clc >>= hpet_clockevent.shift + DEFAULT_RTC_SHIFT;
-		hpet_default_delta = (unsigned long) clc;
-	}
-
-	if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
-		delta = hpet_default_delta;
-	else
-		delta = hpet_pie_delta;
-
-	local_irq_save(flags);
-
-	cnt = delta + hpet_readl(HPET_COUNTER);
-	hpet_writel(cnt, HPET_T1_CMP);
-	hpet_t1_cmp = cnt;
-
-	cfg = hpet_readl(HPET_T1_CFG);
-	cfg &= ~HPET_TN_PERIODIC;
-	cfg |= HPET_TN_ENABLE | HPET_TN_32BIT;
-	hpet_writel(cfg, HPET_T1_CFG);
-
-	local_irq_restore(flags);
-
-	return 1;
-}
-
-/*
- * The functions below are called from rtc driver.
- * Return 0 if HPET is not being used.
- * Otherwise do the necessary changes and return 1.
- */
-int hpet_mask_rtc_irq_bit(unsigned long bit_mask)
-{
-	if (!is_hpet_enabled())
-		return 0;
-
-	hpet_rtc_flags &= ~bit_mask;
-	return 1;
-}
-
-int hpet_set_rtc_irq_bit(unsigned long bit_mask)
-{
-	unsigned long oldbits = hpet_rtc_flags;
-
-	if (!is_hpet_enabled())
-		return 0;
-
-	hpet_rtc_flags |= bit_mask;
-
-	if (!oldbits)
-		hpet_rtc_timer_init();
-
-	return 1;
-}
-
-int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
-			unsigned char sec)
-{
-	if (!is_hpet_enabled())
-		return 0;
-
-	hpet_alarm_time.tm_hour = hrs;
-	hpet_alarm_time.tm_min = min;
-	hpet_alarm_time.tm_sec = sec;
-
-	return 1;
-}
-
-int hpet_set_periodic_freq(unsigned long freq)
-{
-	uint64_t clc;
-
-	if (!is_hpet_enabled())
-		return 0;
-
-	if (freq <= DEFAULT_RTC_INT_FREQ)
-		hpet_pie_limit = DEFAULT_RTC_INT_FREQ / freq;
-	else {
-		clc = (uint64_t) hpet_clockevent.mult * NSEC_PER_SEC;
-		do_div(clc, freq);
-		clc >>= hpet_clockevent.shift;
-		hpet_pie_delta = (unsigned long) clc;
-	}
-	return 1;
-}
-
-int hpet_rtc_dropped_irq(void)
-{
-	return is_hpet_enabled();
-}
-
-static void hpet_rtc_timer_reinit(void)
-{
-	unsigned long cfg, delta;
-	int lost_ints = -1;
-
-	if (unlikely(!hpet_rtc_flags)) {
-		cfg = hpet_readl(HPET_T1_CFG);
-		cfg &= ~HPET_TN_ENABLE;
-		hpet_writel(cfg, HPET_T1_CFG);
-		return;
-	}
-
-	if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
-		delta = hpet_default_delta;
-	else
-		delta = hpet_pie_delta;
-
-	/*
-	 * Increment the comparator value until we are ahead of the
-	 * current count.
-	 */
-	do {
-		hpet_t1_cmp += delta;
-		hpet_writel(hpet_t1_cmp, HPET_T1_CMP);
-		lost_ints++;
-	} while ((long)(hpet_readl(HPET_COUNTER) - hpet_t1_cmp) > 0);
-
-	if (lost_ints) {
-		if (hpet_rtc_flags & RTC_PIE)
-			hpet_pie_count += lost_ints;
-		if (printk_ratelimit())
-			printk(KERN_WARNING "rtc: lost %d interrupts\n",
-				lost_ints);
-	}
-}
-
-irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id)
-{
-	struct rtc_time curr_time;
-	unsigned long rtc_int_flag = 0;
-
-	hpet_rtc_timer_reinit();
-
-	if (hpet_rtc_flags & (RTC_UIE | RTC_AIE))
-		rtc_get_rtc_time(&curr_time);
-
-	if (hpet_rtc_flags & RTC_UIE &&
-	    curr_time.tm_sec != hpet_prev_update_sec) {
-		rtc_int_flag = RTC_UF;
-		hpet_prev_update_sec = curr_time.tm_sec;
-	}
-
-	if (hpet_rtc_flags & RTC_PIE &&
-	    ++hpet_pie_count >= hpet_pie_limit) {
-		rtc_int_flag |= RTC_PF;
-		hpet_pie_count = 0;
-	}
-
-	if (hpet_rtc_flags & RTC_PIE &&
-	    (curr_time.tm_sec == hpet_alarm_time.tm_sec) &&
-	    (curr_time.tm_min == hpet_alarm_time.tm_min) &&
-	    (curr_time.tm_hour == hpet_alarm_time.tm_hour))
-			rtc_int_flag |= RTC_AF;
-
-	if (rtc_int_flag) {
-		rtc_int_flag |= (RTC_IRQF | (RTC_NUM_INTS << 8));
-		rtc_interrupt(rtc_int_flag, dev_id);
-	}
-	return IRQ_HANDLED;
-}
-#endif