diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-init.c | 2 | ||||
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-timer.c | 134 |
2 files changed, 72 insertions, 64 deletions
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c index 681b593..3305fa9 100644 --- a/arch/mips/sgi-ip27/ip27-init.c +++ b/arch/mips/sgi-ip27/ip27-init.c @@ -110,7 +110,7 @@ static void __init per_hub_init(cnodeid_t cnode) } } -void __init per_cpu_init(void) +void __cpuinit per_cpu_init(void) { int cpu = smp_processor_id(); int slice = LOCAL_HUB_L(PI_CPU_NUM); diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c index d467bf4..f5dccf0 100644 --- a/arch/mips/sgi-ip27/ip27-timer.c +++ b/arch/mips/sgi-ip27/ip27-timer.c @@ -111,8 +111,24 @@ unsigned long read_persistent_clock(void) return mktime(year, month, date, hour, min, sec); } -static int rt_set_next_event(unsigned long delta, - struct clock_event_device *evt) +static void enable_rt_irq(unsigned int irq) +{ +} + +static void disable_rt_irq(unsigned int irq) +{ +} + +static struct irq_chip rt_irq_type = { + .name = "SN HUB RT timer", + .ack = disable_rt_irq, + .mask = disable_rt_irq, + .mask_ack = disable_rt_irq, + .unmask = enable_rt_irq, + .eoi = enable_rt_irq, +}; + +static int rt_next_event(unsigned long delta, struct clock_event_device *evt) { unsigned int cpu = smp_processor_id(); int slice = cputoslice(cpu) == 0; @@ -129,50 +145,24 @@ static void rt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: + case CLOCK_EVT_MODE_ONESHOT: /* The only mode supported */ break; + case CLOCK_EVT_MODE_PERIODIC: case CLOCK_EVT_MODE_UNUSED: case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_ONESHOT: case CLOCK_EVT_MODE_RESUME: /* Nothing to do */ break; } } -struct clock_event_device rt_clock_event_device = { - .name = "HUB-RT", - .features = CLOCK_EVT_FEAT_ONESHOT, - - .rating = 300, - .set_next_event = rt_set_next_event, - .set_mode = rt_set_mode, -}; - -static void enable_rt_irq(unsigned int irq) -{ -} - -static void disable_rt_irq(unsigned int irq) -{ -} - -static struct irq_chip rt_irq_type = { - .name = "SN HUB RT timer", - .ack = disable_rt_irq, - .mask = disable_rt_irq, - .mask_ack = disable_rt_irq, - .unmask = enable_rt_irq, - .eoi = enable_rt_irq, -}; - unsigned int rt_timer_irq; -static irqreturn_t ip27_rt_timer_interrupt(int irq, void *dev_id) +static irqreturn_t hub_rt_counter_handler(int irq, void *dev_id) { - struct clock_event_device *cd = &rt_clock_event_device; + struct clock_event_device *cd = dev_id; unsigned int cpu = smp_processor_id(); int slice = cputoslice(cpu) == 0; @@ -182,11 +172,10 @@ static irqreturn_t ip27_rt_timer_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static struct irqaction rt_irqaction = { - .handler = (irq_handler_t) ip27_rt_timer_interrupt, - .flags = IRQF_DISABLED, - .mask = CPU_MASK_NONE, - .name = "timer" +struct irqaction hub_rt_irqaction = { + .handler = hub_rt_counter_handler, + .flags = IRQF_DISABLED | IRQF_PERCPU, + .name = "hub-rt", }; /* @@ -200,32 +189,48 @@ static struct irqaction rt_irqaction = { #define NSEC_PER_CYCLE 800 #define CYCLES_PER_SEC (NSEC_PER_SEC / NSEC_PER_CYCLE) -static void __init ip27_rt_clock_event_init(void) +static DEFINE_PER_CPU(struct clock_event_device, hub_rt_clockevent); +static DEFINE_PER_CPU(char [11], hub_rt_name); + +static void __cpuinit hub_rt_clock_event_init(void) { - struct clock_event_device *cd = &rt_clock_event_device; unsigned int cpu = smp_processor_id(); - int irq = allocate_irqno(); - - if (irq < 0) - panic("Can't allocate interrupt number for timer interrupt"); - - rt_timer_irq = irq; - + struct clock_event_device *cd = &per_cpu(hub_rt_clockevent, cpu); + unsigned char *name = per_cpu(hub_rt_name, cpu); + int irq = rt_timer_irq; + + sprintf(name, "hub-rt %d", cpu); + cd->name = "HUB-RT", + cd->features = CLOCK_EVT_FEAT_ONESHOT, + clockevent_set_clock(cd, CYCLES_PER_SEC); + cd->max_delta_ns = clockevent_delta2ns(0xfffffffffffff, cd); + cd->min_delta_ns = clockevent_delta2ns(0x300, cd); + cd->rating = 200, cd->irq = irq, cd->cpumask = cpumask_of_cpu(cpu), - - /* - * Calculate the min / max delta - */ - cd->mult = - div_sc((unsigned long) CYCLES_PER_SEC, NSEC_PER_SEC, 32); - cd->shift = 32; - cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); - cd->min_delta_ns = clockevent_delta2ns(0x300, cd); + cd->rating = 300, + cd->set_next_event = rt_next_event, + cd->set_mode = rt_set_mode, clockevents_register_device(cd); +} + +static void __init hub_rt_clock_event_global_init(void) +{ + unsigned int irq; + + do { + smp_wmb(); + irq = rt_timer_irq; + if (irq) + break; + + irq = allocate_irqno(); + if (irq < 0) + panic("Allocation of irq number for timer failed"); + } while (xchg(&rt_timer_irq, irq)); set_irq_chip_and_handler(irq, &rt_irq_type, handle_percpu_irq); - setup_irq(irq, &rt_irqaction); + setup_irq(irq, &hub_rt_irqaction); } static cycle_t hub_rt_read(void) @@ -233,27 +238,29 @@ static cycle_t hub_rt_read(void) return REMOTE_HUB_L(cputonasid(0), PI_RT_COUNT); } -struct clocksource ht_rt_clocksource = { +struct clocksource hub_rt_clocksource = { .name = "HUB-RT", .rating = 200, .read = hub_rt_read, .mask = CLOCKSOURCE_MASK(52), - .shift = 32, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -static void __init ip27_rt_clocksource_init(void) +static void __init hub_rt_clocksource_init(void) { - clocksource_register(&ht_rt_clocksource); + struct clocksource *cs = &hub_rt_clocksource; + + clocksource_set_clock(cs, CYCLES_PER_SEC); + clocksource_register(cs); } void __init plat_time_init(void) { - ip27_rt_clock_event_init(); - ip27_rt_clocksource_init(); + hub_rt_clocksource_init(); + hub_rt_clock_event_global_init(); } -void __init cpu_time_init(void) +void __cpuinit cpu_time_init(void) { lboard_t *board; klcpu_t *cpu; @@ -271,6 +278,7 @@ void __init cpu_time_init(void) printk("CPU %d clock is %dMHz.\n", smp_processor_id(), cpu->cpu_speed); + hub_rt_clock_event_init(); set_c0_status(SRB_TIMOCLK); } |
