static void ack_bcm1480_irq(unsigned int irq) { u64 pending; unsigned int irq_dirty; int k; /* * If the interrupt was an HT interrupt, now is the time to * clear it. NOTE: we assume the HT bridge was set up to * deliver the interrupts to all CPUs (which makes affinity * changing easier for us) */ irq_dirty = irq; if ((irq_dirty >= BCM1480_NR_IRQS_HALF) && (irq_dirty <= BCM1480_NR_IRQS)) { irq_dirty -= BCM1480_NR_IRQS_HALF; } for (k=0; k<2; k++) { /* Loop through high and low LDT interrupts */ pending = __raw_readq(IOADDR(A_BCM1480_IMR_REGISTER(bcm1480_irq_owner[irq], R_BCM1480_IMR_LDT_INTERRUPT_H + (k*BCM1480_IMR_HL_SPACING)))); pending &= ((u64)1 << (irq_dirty)); if (pending) { #ifdef CONFIG_SMP int i; for (i=0; i<NR_CPUS; i++) { /* * Clear for all CPUs so an affinity switch * doesn't find an old status */ __raw_writeq(pending, IOADDR(A_BCM1480_IMR_REGISTER(cpu_logical_map(i), R_BCM1480_IMR_LDT_INTERRUPT_CLR_H + (k*BCM1480_IMR_HL_SPACING)))); } #else __raw_writeq(pending, IOADDR(A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_LDT_INTERRUPT_CLR_H + (k*BCM1480_IMR_HL_SPACING)))); #endif /* * Generate EOI. For Pass 1 parts, EOI is a nop. For * Pass 2, the LDT world may be edge-triggered, but * this EOI shouldn't hurt. If they are * level-sensitive, the EOI is required. */ #ifdef CONFIG_PCI if (ht_eoi_space) *(uint32_t *)(ht_eoi_space+(irq<<16)+(7<<2)) = 0; #endif } } bcm1480_mask_irq(bcm1480_irq_owner[irq], irq); }
void sb1480_clockevent_init(void) { unsigned int cpu = smp_processor_id(); unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu; struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu); struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu); unsigned char *name = per_cpu(sibyte_hpt_name, cpu); BUG_ON(cpu > 3); /* Only have 4 general purpose timers */ sprintf(name, "bcm1480-counter-%d", cpu); cd->name = name; cd->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; clockevent_set_clock(cd, V_SCD_TIMER_FREQ); cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd); cd->min_delta_ns = clockevent_delta2ns(2, cd); cd->rating = 200; cd->irq = irq; cd->cpumask = cpumask_of(cpu); cd->set_next_event = sibyte_next_event; cd->set_state_shutdown = sibyte_shutdown; cd->set_state_periodic = sibyte_set_periodic; cd->set_state_oneshot = sibyte_shutdown; clockevents_register_device(cd); bcm1480_mask_irq(cpu, irq); /* * Map the timer interrupt to IP[4] of this cpu */ __raw_writeq(IMR_IP4_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3))); bcm1480_unmask_irq(cpu, irq); action->handler = sibyte_counter_handler; action->flags = IRQF_PERCPU | IRQF_TIMER; action->name = name; action->dev_id = cd; irq_set_affinity(irq, cpumask_of(cpu)); setup_irq(irq, action); }
void bcm1480_time_init(void) { int cpu = smp_processor_id(); int irq = K_BCM1480_INT_TIMER_0+cpu; /* Only have 4 general purpose timers */ if (cpu > 3) { BUG(); } bcm1480_mask_irq(cpu, irq); /* Map the timer interrupt to ip[4] of this cpu */ __raw_writeq(IMR_IP4_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq<<3))); /* the general purpose timer ticks at 1 Mhz independent of the rest of the system */ /* Disable the timer and set up the count */ __raw_writeq(0, IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG))); __raw_writeq( BCM1480_HPT_VALUE/HZ , IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT))); /* Set the timer running */ __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS, IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG))); bcm1480_unmask_irq(cpu, irq); bcm1480_steal_irq(irq); /* * This interrupt is "special" in that it doesn't use the request_irq * way to hook the irq line. The timer interrupt is initialized early * enough to make this a major pain, and it's also firing enough to * warrant a bit of special case code. bcm1480_timer_interrupt is * called directly from irq_handler.S when IP[4] is set during an * interrupt */ }
static void disable_bcm1480_irq(unsigned int irq) { bcm1480_mask_irq(bcm1480_irq_owner[irq], irq); }
static void disable_bcm1480_irq(struct irq_data *d) { unsigned int irq = d->irq; bcm1480_mask_irq(bcm1480_irq_owner[irq], irq); }