+++ /dev/null
-/* time.c: UltraSparc timer and TOD clock support.
- *
- * Copyright (C) 1997, 2008 David S. Miller (davem@davemloft.net)
- * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
- *
- * Based largely on code which is:
- *
- * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/timex.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/mc146818rtc.h>
-#include <linux/delay.h>
-#include <linux/profile.h>
-#include <linux/bcd.h>
-#include <linux/jiffies.h>
-#include <linux/cpufreq.h>
-#include <linux/percpu.h>
-#include <linux/miscdevice.h>
-#include <linux/rtc.h>
-#include <linux/rtc/m48t59.h>
-#include <linux/kernel_stat.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-
-#include <asm/oplib.h>
-#include <asm/timer.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/starfire.h>
-#include <asm/smp.h>
-#include <asm/sections.h>
-#include <asm/cpudata.h>
-#include <asm/uaccess.h>
-#include <asm/irq_regs.h>
-
-#include "entry.h"
-
-DEFINE_SPINLOCK(rtc_lock);
-
-#define TICK_PRIV_BIT (1UL << 63)
-#define TICKCMP_IRQ_BIT (1UL << 63)
-
-#ifdef CONFIG_SMP
-unsigned long profile_pc(struct pt_regs *regs)
-{
- unsigned long pc = instruction_pointer(regs);
-
- if (in_lock_functions(pc))
- return regs->u_regs[UREG_RETPC];
- return pc;
-}
-EXPORT_SYMBOL(profile_pc);
-#endif
-
-static void tick_disable_protection(void)
-{
- /* Set things up so user can access tick register for profiling
- * purposes. Also workaround BB_ERRATA_1 by doing a dummy
- * read back of %tick after writing it.
- */
- __asm__ __volatile__(
- " ba,pt %%xcc, 1f\n"
- " nop\n"
- " .align 64\n"
- "1: rd %%tick, %%g2\n"
- " add %%g2, 6, %%g2\n"
- " andn %%g2, %0, %%g2\n"
- " wrpr %%g2, 0, %%tick\n"
- " rdpr %%tick, %%g0"
- : /* no outputs */
- : "r" (TICK_PRIV_BIT)
- : "g2");
-}
-
-static void tick_disable_irq(void)
-{
- __asm__ __volatile__(
- " ba,pt %%xcc, 1f\n"
- " nop\n"
- " .align 64\n"
- "1: wr %0, 0x0, %%tick_cmpr\n"
- " rd %%tick_cmpr, %%g0"
- : /* no outputs */
- : "r" (TICKCMP_IRQ_BIT));
-}
-
-static void tick_init_tick(void)
-{
- tick_disable_protection();
- tick_disable_irq();
-}
-
-static unsigned long tick_get_tick(void)
-{
- unsigned long ret;
-
- __asm__ __volatile__("rd %%tick, %0\n\t"
- "mov %0, %0"
- : "=r" (ret));
-
- return ret & ~TICK_PRIV_BIT;
-}
-
-static int tick_add_compare(unsigned long adj)
-{
- unsigned long orig_tick, new_tick, new_compare;
-
- __asm__ __volatile__("rd %%tick, %0"
- : "=r" (orig_tick));
-
- orig_tick &= ~TICKCMP_IRQ_BIT;
-
- /* Workaround for Spitfire Errata (#54 I think??), I discovered
- * this via Sun BugID 4008234, mentioned in Solaris-2.5.1 patch
- * number 103640.
- *
- * On Blackbird writes to %tick_cmpr can fail, the
- * workaround seems to be to execute the wr instruction
- * at the start of an I-cache line, and perform a dummy
- * read back from %tick_cmpr right after writing to it. -DaveM
- */
- __asm__ __volatile__("ba,pt %%xcc, 1f\n\t"
- " add %1, %2, %0\n\t"
- ".align 64\n"
- "1:\n\t"
- "wr %0, 0, %%tick_cmpr\n\t"
- "rd %%tick_cmpr, %%g0\n\t"
- : "=r" (new_compare)
- : "r" (orig_tick), "r" (adj));
-
- __asm__ __volatile__("rd %%tick, %0"
- : "=r" (new_tick));
- new_tick &= ~TICKCMP_IRQ_BIT;
-
- return ((long)(new_tick - (orig_tick+adj))) > 0L;
-}
-
-static unsigned long tick_add_tick(unsigned long adj)
-{
- unsigned long new_tick;
-
- /* Also need to handle Blackbird bug here too. */
- __asm__ __volatile__("rd %%tick, %0\n\t"
- "add %0, %1, %0\n\t"
- "wrpr %0, 0, %%tick\n\t"
- : "=&r" (new_tick)
- : "r" (adj));
-
- return new_tick;
-}
-
-static struct sparc64_tick_ops tick_operations __read_mostly = {
- .name = "tick",
- .init_tick = tick_init_tick,
- .disable_irq = tick_disable_irq,
- .get_tick = tick_get_tick,
- .add_tick = tick_add_tick,
- .add_compare = tick_add_compare,
- .softint_mask = 1UL << 0,
-};
-
-struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations;
-
-static void stick_disable_irq(void)
-{
- __asm__ __volatile__(
- "wr %0, 0x0, %%asr25"
- : /* no outputs */
- : "r" (TICKCMP_IRQ_BIT));
-}
-
-static void stick_init_tick(void)
-{
- /* Writes to the %tick and %stick register are not
- * allowed on sun4v. The Hypervisor controls that
- * bit, per-strand.
- */
- if (tlb_type != hypervisor) {
- tick_disable_protection();
- tick_disable_irq();
-
- /* Let the user get at STICK too. */
- __asm__ __volatile__(
- " rd %%asr24, %%g2\n"
- " andn %%g2, %0, %%g2\n"
- " wr %%g2, 0, %%asr24"
- : /* no outputs */
- : "r" (TICK_PRIV_BIT)
- : "g1", "g2");
- }
-
- stick_disable_irq();
-}
-
-static unsigned long stick_get_tick(void)
-{
- unsigned long ret;
-
- __asm__ __volatile__("rd %%asr24, %0"
- : "=r" (ret));
-
- return ret & ~TICK_PRIV_BIT;
-}
-
-static unsigned long stick_add_tick(unsigned long adj)
-{
- unsigned long new_tick;
-
- __asm__ __volatile__("rd %%asr24, %0\n\t"
- "add %0, %1, %0\n\t"
- "wr %0, 0, %%asr24\n\t"
- : "=&r" (new_tick)
- : "r" (adj));
-
- return new_tick;
-}
-
-static int stick_add_compare(unsigned long adj)
-{
- unsigned long orig_tick, new_tick;
-
- __asm__ __volatile__("rd %%asr24, %0"
- : "=r" (orig_tick));
- orig_tick &= ~TICKCMP_IRQ_BIT;
-
- __asm__ __volatile__("wr %0, 0, %%asr25"
- : /* no outputs */
- : "r" (orig_tick + adj));
-
- __asm__ __volatile__("rd %%asr24, %0"
- : "=r" (new_tick));
- new_tick &= ~TICKCMP_IRQ_BIT;
-
- return ((long)(new_tick - (orig_tick+adj))) > 0L;
-}
-
-static struct sparc64_tick_ops stick_operations __read_mostly = {
- .name = "stick",
- .init_tick = stick_init_tick,
- .disable_irq = stick_disable_irq,
- .get_tick = stick_get_tick,
- .add_tick = stick_add_tick,
- .add_compare = stick_add_compare,
- .softint_mask = 1UL << 16,
-};
-
-/* On Hummingbird the STICK/STICK_CMPR register is implemented
- * in I/O space. There are two 64-bit registers each, the
- * first holds the low 32-bits of the value and the second holds
- * the high 32-bits.
- *
- * Since STICK is constantly updating, we have to access it carefully.
- *
- * The sequence we use to read is:
- * 1) read high
- * 2) read low
- * 3) read high again, if it rolled re-read both low and high again.
- *
- * Writing STICK safely is also tricky:
- * 1) write low to zero
- * 2) write high
- * 3) write low
- */
-#define HBIRD_STICKCMP_ADDR 0x1fe0000f060UL
-#define HBIRD_STICK_ADDR 0x1fe0000f070UL
-
-static unsigned long __hbird_read_stick(void)
-{
- unsigned long ret, tmp1, tmp2, tmp3;
- unsigned long addr = HBIRD_STICK_ADDR+8;
-
- __asm__ __volatile__("ldxa [%1] %5, %2\n"
- "1:\n\t"
- "sub %1, 0x8, %1\n\t"
- "ldxa [%1] %5, %3\n\t"
- "add %1, 0x8, %1\n\t"
- "ldxa [%1] %5, %4\n\t"
- "cmp %4, %2\n\t"
- "bne,a,pn %%xcc, 1b\n\t"
- " mov %4, %2\n\t"
- "sllx %4, 32, %4\n\t"
- "or %3, %4, %0\n\t"
- : "=&r" (ret), "=&r" (addr),
- "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3)
- : "i" (ASI_PHYS_BYPASS_EC_E), "1" (addr));
-
- return ret;
-}
-
-static void __hbird_write_stick(unsigned long val)
-{
- unsigned long low = (val & 0xffffffffUL);
- unsigned long high = (val >> 32UL);
- unsigned long addr = HBIRD_STICK_ADDR;
-
- __asm__ __volatile__("stxa %%g0, [%0] %4\n\t"
- "add %0, 0x8, %0\n\t"
- "stxa %3, [%0] %4\n\t"
- "sub %0, 0x8, %0\n\t"
- "stxa %2, [%0] %4"
- : "=&r" (addr)
- : "0" (addr), "r" (low), "r" (high),
- "i" (ASI_PHYS_BYPASS_EC_E));
-}
-
-static void __hbird_write_compare(unsigned long val)
-{
- unsigned long low = (val & 0xffffffffUL);
- unsigned long high = (val >> 32UL);
- unsigned long addr = HBIRD_STICKCMP_ADDR + 0x8UL;
-
- __asm__ __volatile__("stxa %3, [%0] %4\n\t"
- "sub %0, 0x8, %0\n\t"
- "stxa %2, [%0] %4"
- : "=&r" (addr)
- : "0" (addr), "r" (low), "r" (high),
- "i" (ASI_PHYS_BYPASS_EC_E));
-}
-
-static void hbtick_disable_irq(void)
-{
- __hbird_write_compare(TICKCMP_IRQ_BIT);
-}
-
-static void hbtick_init_tick(void)
-{
- tick_disable_protection();
-
- /* XXX This seems to be necessary to 'jumpstart' Hummingbird
- * XXX into actually sending STICK interrupts. I think because
- * XXX of how we store %tick_cmpr in head.S this somehow resets the
- * XXX {TICK + STICK} interrupt mux. -DaveM
- */
- __hbird_write_stick(__hbird_read_stick());
-
- hbtick_disable_irq();
-}
-
-static unsigned long hbtick_get_tick(void)
-{
- return __hbird_read_stick() & ~TICK_PRIV_BIT;
-}
-
-static unsigned long hbtick_add_tick(unsigned long adj)
-{
- unsigned long val;
-
- val = __hbird_read_stick() + adj;
- __hbird_write_stick(val);
-
- return val;
-}
-
-static int hbtick_add_compare(unsigned long adj)
-{
- unsigned long val = __hbird_read_stick();
- unsigned long val2;
-
- val &= ~TICKCMP_IRQ_BIT;
- val += adj;
- __hbird_write_compare(val);
-
- val2 = __hbird_read_stick() & ~TICKCMP_IRQ_BIT;
-
- return ((long)(val2 - val)) > 0L;
-}
-
-static struct sparc64_tick_ops hbtick_operations __read_mostly = {
- .name = "hbtick",
- .init_tick = hbtick_init_tick,
- .disable_irq = hbtick_disable_irq,
- .get_tick = hbtick_get_tick,
- .add_tick = hbtick_add_tick,
- .add_compare = hbtick_add_compare,
- .softint_mask = 1UL << 0,
-};
-
-static unsigned long timer_ticks_per_nsec_quotient __read_mostly;
-
-int update_persistent_clock(struct timespec now)
-{
- struct rtc_device *rtc = rtc_class_open("rtc0");
- int err = -1;
-
- if (rtc) {
- err = rtc_set_mmss(rtc, now.tv_sec);
- rtc_class_close(rtc);
- }
-
- return err;
-}
-
-unsigned long cmos_regs;
-EXPORT_SYMBOL(cmos_regs);
-
-static struct resource rtc_cmos_resource;
-
-static struct platform_device rtc_cmos_device = {
- .name = "rtc_cmos",
- .id = -1,
- .resource = &rtc_cmos_resource,
- .num_resources = 1,
-};
-
-static int __devinit rtc_probe(struct of_device *op, const struct of_device_id *match)
-{
- struct resource *r;
-
- printk(KERN_INFO "%s: RTC regs at 0x%lx\n",
- op->node->full_name, op->resource[0].start);
-
- /* The CMOS RTC driver only accepts IORESOURCE_IO, so cons
- * up a fake resource so that the probe works for all cases.
- * When the RTC is behind an ISA bus it will have IORESOURCE_IO
- * already, whereas when it's behind EBUS is will be IORESOURCE_MEM.
- */
-
- r = &rtc_cmos_resource;
- r->flags = IORESOURCE_IO;
- r->name = op->resource[0].name;
- r->start = op->resource[0].start;
- r->end = op->resource[0].end;
-
- cmos_regs = op->resource[0].start;
- return platform_device_register(&rtc_cmos_device);
-}
-
-static struct of_device_id __initdata rtc_match[] = {
- {
- .name = "rtc",
- .compatible = "m5819",
- },
- {
- .name = "rtc",
- .compatible = "isa-m5819p",
- },
- {
- .name = "rtc",
- .compatible = "isa-m5823p",
- },
- {
- .name = "rtc",
- .compatible = "ds1287",
- },
- {},
-};
-
-static struct of_platform_driver rtc_driver = {
- .match_table = rtc_match,
- .probe = rtc_probe,
- .driver = {
- .name = "rtc",
- },
-};
-
-static struct platform_device rtc_bq4802_device = {
- .name = "rtc-bq4802",
- .id = -1,
- .num_resources = 1,
-};
-
-static int __devinit bq4802_probe(struct of_device *op, const struct of_device_id *match)
-{
-
- printk(KERN_INFO "%s: BQ4802 regs at 0x%lx\n",
- op->node->full_name, op->resource[0].start);
-
- rtc_bq4802_device.resource = &op->resource[0];
- return platform_device_register(&rtc_bq4802_device);
-}
-
-static struct of_device_id __initdata bq4802_match[] = {
- {
- .name = "rtc",
- .compatible = "bq4802",
- },
- {},
-};
-
-static struct of_platform_driver bq4802_driver = {
- .match_table = bq4802_match,
- .probe = bq4802_probe,
- .driver = {
- .name = "bq4802",
- },
-};
-
-static unsigned char mostek_read_byte(struct device *dev, u32 ofs)
-{
- struct platform_device *pdev = to_platform_device(dev);
- void __iomem *regs = (void __iomem *) pdev->resource[0].start;
-
- return readb(regs + ofs);
-}
-
-static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
-{
- struct platform_device *pdev = to_platform_device(dev);
- void __iomem *regs = (void __iomem *) pdev->resource[0].start;
-
- writeb(val, regs + ofs);
-}
-
-static struct m48t59_plat_data m48t59_data = {
- .read_byte = mostek_read_byte,
- .write_byte = mostek_write_byte,
-};
-
-static struct platform_device m48t59_rtc = {
- .name = "rtc-m48t59",
- .id = 0,
- .num_resources = 1,
- .dev = {
- .platform_data = &m48t59_data,
- },
-};
-
-static int __devinit mostek_probe(struct of_device *op, const struct of_device_id *match)
-{
- struct device_node *dp = op->node;
-
- /* On an Enterprise system there can be multiple mostek clocks.
- * We should only match the one that is on the central FHC bus.
- */
- if (!strcmp(dp->parent->name, "fhc") &&
- strcmp(dp->parent->parent->name, "central") != 0)
- return -ENODEV;
-
- printk(KERN_INFO "%s: Mostek regs at 0x%lx\n",
- dp->full_name, op->resource[0].start);
-
- m48t59_rtc.resource = &op->resource[0];
- return platform_device_register(&m48t59_rtc);
-}
-
-static struct of_device_id __initdata mostek_match[] = {
- {
- .name = "eeprom",
- },
- {},
-};
-
-static struct of_platform_driver mostek_driver = {
- .match_table = mostek_match,
- .probe = mostek_probe,
- .driver = {
- .name = "mostek",
- },
-};
-
-static struct platform_device rtc_sun4v_device = {
- .name = "rtc-sun4v",
- .id = -1,
-};
-
-static struct platform_device rtc_starfire_device = {
- .name = "rtc-starfire",
- .id = -1,
-};
-
-static int __init clock_init(void)
-{
- if (this_is_starfire)
- return platform_device_register(&rtc_starfire_device);
-
- if (tlb_type == hypervisor)
- return platform_device_register(&rtc_sun4v_device);
-
- (void) of_register_driver(&rtc_driver, &of_platform_bus_type);
- (void) of_register_driver(&mostek_driver, &of_platform_bus_type);
- (void) of_register_driver(&bq4802_driver, &of_platform_bus_type);
-
- return 0;
-}
-
-/* Must be after subsys_initcall() so that busses are probed. Must
- * be before device_initcall() because things like the RTC driver
- * need to see the clock registers.
- */
-fs_initcall(clock_init);
-
-/* This is gets the master TICK_INT timer going. */
-static unsigned long sparc64_init_timers(void)
-{
- struct device_node *dp;
- unsigned long freq;
-
- dp = of_find_node_by_path("/");
- if (tlb_type == spitfire) {
- unsigned long ver, manuf, impl;
-
- __asm__ __volatile__ ("rdpr %%ver, %0"
- : "=&r" (ver));
- manuf = ((ver >> 48) & 0xffff);
- impl = ((ver >> 32) & 0xffff);
- if (manuf == 0x17 && impl == 0x13) {
- /* Hummingbird, aka Ultra-IIe */
- tick_ops = &hbtick_operations;
- freq = of_getintprop_default(dp, "stick-frequency", 0);
- } else {
- tick_ops = &tick_operations;
- freq = local_cpu_data().clock_tick;
- }
- } else {
- tick_ops = &stick_operations;
- freq = of_getintprop_default(dp, "stick-frequency", 0);
- }
-
- return freq;
-}
-
-struct freq_table {
- unsigned long clock_tick_ref;
- unsigned int ref_freq;
-};
-static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0 };
-
-unsigned long sparc64_get_clock_tick(unsigned int cpu)
-{
- struct freq_table *ft = &per_cpu(sparc64_freq_table, cpu);
-
- if (ft->clock_tick_ref)
- return ft->clock_tick_ref;
- return cpu_data(cpu).clock_tick;
-}
-
-#ifdef CONFIG_CPU_FREQ
-
-static int sparc64_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
- void *data)
-{
- struct cpufreq_freqs *freq = data;
- unsigned int cpu = freq->cpu;
- struct freq_table *ft = &per_cpu(sparc64_freq_table, cpu);
-
- if (!ft->ref_freq) {
- ft->ref_freq = freq->old;
- ft->clock_tick_ref = cpu_data(cpu).clock_tick;
- }
- if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) ||
- (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) ||
- (val == CPUFREQ_RESUMECHANGE)) {
- cpu_data(cpu).clock_tick =
- cpufreq_scale(ft->clock_tick_ref,
- ft->ref_freq,
- freq->new);
- }
-
- return 0;
-}
-
-static struct notifier_block sparc64_cpufreq_notifier_block = {
- .notifier_call = sparc64_cpufreq_notifier
-};
-
-static int __init register_sparc64_cpufreq_notifier(void)
-{
-
- cpufreq_register_notifier(&sparc64_cpufreq_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
- return 0;
-}
-
-core_initcall(register_sparc64_cpufreq_notifier);
-
-#endif /* CONFIG_CPU_FREQ */
-
-static int sparc64_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- return tick_ops->add_compare(delta) ? -ETIME : 0;
-}
-
-static void sparc64_timer_setup(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- switch (mode) {
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_RESUME:
- break;
-
- case CLOCK_EVT_MODE_SHUTDOWN:
- tick_ops->disable_irq();
- break;
-
- case CLOCK_EVT_MODE_PERIODIC:
- case CLOCK_EVT_MODE_UNUSED:
- WARN_ON(1);
- break;
- };
-}
-
-static struct clock_event_device sparc64_clockevent = {
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = sparc64_timer_setup,
- .set_next_event = sparc64_next_event,
- .rating = 100,
- .shift = 30,
- .irq = -1,
-};
-static DEFINE_PER_CPU(struct clock_event_device, sparc64_events);
-
-void timer_interrupt(int irq, struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- unsigned long tick_mask = tick_ops->softint_mask;
- int cpu = smp_processor_id();
- struct clock_event_device *evt = &per_cpu(sparc64_events, cpu);
-
- clear_softint(tick_mask);
-
- irq_enter();
-
- kstat_this_cpu.irqs[0]++;
-
- if (unlikely(!evt->event_handler)) {
- printk(KERN_WARNING
- "Spurious SPARC64 timer interrupt on cpu %d\n", cpu);
- } else
- evt->event_handler(evt);
-
- irq_exit();
-
- set_irq_regs(old_regs);
-}
-
-void __devinit setup_sparc64_timer(void)
-{
- struct clock_event_device *sevt;
- unsigned long pstate;
-
- /* Guarantee that the following sequences execute
- * uninterrupted.
- */
- __asm__ __volatile__("rdpr %%pstate, %0\n\t"
- "wrpr %0, %1, %%pstate"
- : "=r" (pstate)
- : "i" (PSTATE_IE));
-
- tick_ops->init_tick();
-
- /* Restore PSTATE_IE. */
- __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
- : /* no outputs */
- : "r" (pstate));
-
- sevt = &__get_cpu_var(sparc64_events);
-
- memcpy(sevt, &sparc64_clockevent, sizeof(*sevt));
- sevt->cpumask = cpumask_of_cpu(smp_processor_id());
-
- clockevents_register_device(sevt);
-}
-
-#define SPARC64_NSEC_PER_CYC_SHIFT 10UL
-
-static struct clocksource clocksource_tick = {
- .rating = 100,
- .mask = CLOCKSOURCE_MASK(64),
- .shift = 16,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static void __init setup_clockevent_multiplier(unsigned long hz)
-{
- unsigned long mult, shift = 32;
-
- while (1) {
- mult = div_sc(hz, NSEC_PER_SEC, shift);
- if (mult && (mult >> 32UL) == 0UL)
- break;
-
- shift--;
- }
-
- sparc64_clockevent.shift = shift;
- sparc64_clockevent.mult = mult;
-}
-
-static unsigned long tb_ticks_per_usec __read_mostly;
-
-void __delay(unsigned long loops)
-{
- unsigned long bclock, now;
-
- bclock = tick_ops->get_tick();
- do {
- now = tick_ops->get_tick();
- } while ((now-bclock) < loops);
-}
-EXPORT_SYMBOL(__delay);
-
-void udelay(unsigned long usecs)
-{
- __delay(tb_ticks_per_usec * usecs);
-}
-EXPORT_SYMBOL(udelay);
-
-void __init time_init(void)
-{
- unsigned long freq = sparc64_init_timers();
-
- tb_ticks_per_usec = freq / USEC_PER_SEC;
-
- timer_ticks_per_nsec_quotient =
- clocksource_hz2mult(freq, SPARC64_NSEC_PER_CYC_SHIFT);
-
- clocksource_tick.name = tick_ops->name;
- clocksource_tick.mult =
- clocksource_hz2mult(freq,
- clocksource_tick.shift);
- clocksource_tick.read = tick_ops->get_tick;
-
- printk("clocksource: mult[%x] shift[%d]\n",
- clocksource_tick.mult, clocksource_tick.shift);
-
- clocksource_register(&clocksource_tick);
-
- sparc64_clockevent.name = tick_ops->name;
-
- setup_clockevent_multiplier(freq);
-
- sparc64_clockevent.max_delta_ns =
- clockevent_delta2ns(0x7fffffffffffffffUL, &sparc64_clockevent);
- sparc64_clockevent.min_delta_ns =
- clockevent_delta2ns(0xF, &sparc64_clockevent);
-
- printk("clockevent: mult[%lx] shift[%d]\n",
- sparc64_clockevent.mult, sparc64_clockevent.shift);
-
- setup_sparc64_timer();
-}
-
-unsigned long long sched_clock(void)
-{
- unsigned long ticks = tick_ops->get_tick();
-
- return (ticks * timer_ticks_per_nsec_quotient)
- >> SPARC64_NSEC_PER_CYC_SHIFT;
-}
-
-int __devinit read_current_timer(unsigned long *timer_val)
-{
- *timer_val = tick_ops->get_tick();
- return 0;
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff