diff options
Diffstat (limited to 'arch/sparc/kernel/time_64.c')
| -rw-r--r-- | arch/sparc/kernel/time_64.c | 862 |
1 files changed, 862 insertions, 0 deletions
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c new file mode 100644 index 00000000000..9df8f095a8b --- /dev/null +++ b/arch/sparc/kernel/time_64.c @@ -0,0 +1,862 @@ +/* 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(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; +} |