diff options
Diffstat (limited to 'arch/sparc64/kernel/time.c')
| -rw-r--r-- | arch/sparc64/kernel/time.c | 862 |
1 files changed, 0 insertions, 862 deletions
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c deleted file mode 100644 index 141da375909..00000000000 --- a/arch/sparc64/kernel/time.c +++ /dev/null @@ -1,862 +0,0 @@ -/* 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; -} |