Initial import

1 files changed, 2342 insertions, 0 deletions

diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
new file mode 100644
index 000000000..10f762557
--- /dev/null
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -0,0 +1,2342 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2014 Cavium, Inc.
+ */
+
+#include <linux/of_address.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/bitops.h>
+#include <linux/of_irq.h>
+#include <linux/percpu.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/smp.h>
+#include <linux/of.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-ciu2-defs.h>
+
+static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
+static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
+static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
+
+struct octeon_irq_ciu_domain_data {
+	int num_sum;  /* number of sum registers (2 or 3). */
+};
+
+static __read_mostly u8 octeon_irq_ciu_to_irq[8][64];
+
+struct octeon_ciu_chip_data {
+	union {
+		struct {		/* only used for ciu3 */
+			u64 ciu3_addr;
+			unsigned int intsn;
+		};
+		struct {		/* only used for ciu/ciu2 */
+			u8 line;
+			u8 bit;
+			u8 gpio_line;
+		};
+	};
+	int current_cpu;	/* Next CPU expected to take this irq */
+};
+
+struct octeon_core_chip_data {
+	struct mutex core_irq_mutex;
+	bool current_en;
+	bool desired_en;
+	u8 bit;
+};
+
+#define MIPS_CORE_IRQ_LINES 8
+
+static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES];
+
+static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line,
+				      struct irq_chip *chip,
+				      irq_flow_handler_t handler)
+{
+	struct octeon_ciu_chip_data *cd;
+
+	cd = kzalloc(sizeof(*cd), GFP_KERNEL);
+	if (!cd)
+		return -ENOMEM;
+
+	irq_set_chip_and_handler(irq, chip, handler);
+
+	cd->line = line;
+	cd->bit = bit;
+	cd->gpio_line = gpio_line;
+
+	irq_set_chip_data(irq, cd);
+	octeon_irq_ciu_to_irq[line][bit] = irq;
+	return 0;
+}
+
+static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq)
+{
+	struct irq_data *data = irq_get_irq_data(irq);
+	struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+	irq_set_chip_data(irq, NULL);
+	kfree(cd);
+}
+
+static int octeon_irq_force_ciu_mapping(struct irq_domain *domain,
+					int irq, int line, int bit)
+{
+	return irq_domain_associate(domain, irq, line << 6 | bit);
+}
+
+static int octeon_coreid_for_cpu(int cpu)
+{
+#ifdef CONFIG_SMP
+	return cpu_logical_map(cpu);
+#else
+	return cvmx_get_core_num();
+#endif
+}
+
+static int octeon_cpu_for_coreid(int coreid)
+{
+#ifdef CONFIG_SMP
+	return cpu_number_map(coreid);
+#else
+	return smp_processor_id();
+#endif
+}
+
+static void octeon_irq_core_ack(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+	unsigned int bit = cd->bit;
+
+	/*
+	 * We don't need to disable IRQs to make these atomic since
+	 * they are already disabled earlier in the low level
+	 * interrupt code.
+	 */
+	clear_c0_status(0x100 << bit);
+	/* The two user interrupts must be cleared manually. */
+	if (bit < 2)
+		clear_c0_cause(0x100 << bit);
+}
+
+static void octeon_irq_core_eoi(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+	/*
+	 * We don't need to disable IRQs to make these atomic since
+	 * they are already disabled earlier in the low level
+	 * interrupt code.
+	 */
+	set_c0_status(0x100 << cd->bit);
+}
+
+static void octeon_irq_core_set_enable_local(void *arg)
+{
+	struct irq_data *data = arg;
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+	unsigned int mask = 0x100 << cd->bit;
+
+	/*
+	 * Interrupts are already disabled, so these are atomic.
+	 */
+	if (cd->desired_en)
+		set_c0_status(mask);
+	else
+		clear_c0_status(mask);
+
+}
+
+static void octeon_irq_core_disable(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+	cd->desired_en = false;
+}
+
+static void octeon_irq_core_enable(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+	cd->desired_en = true;
+}
+
+static void octeon_irq_core_bus_lock(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+	mutex_lock(&cd->core_irq_mutex);
+}
+
+static void octeon_irq_core_bus_sync_unlock(struct irq_data *data)
+{
+	struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+	if (cd->desired_en != cd->current_en) {
+		on_each_cpu(octeon_irq_core_set_enable_local, data, 1);
+
+		cd->current_en = cd->desired_en;
+	}
+
+	mutex_unlock(&cd->core_irq_mutex);
+}
+
+static struct irq_chip octeon_irq_chip_core = {
+	.name = "Core",
+	.irq_enable = octeon_irq_core_enable,
+	.irq_disable = octeon_irq_core_disable,
+	.irq_ack = octeon_irq_core_ack,
+	.irq_eoi = octeon_irq_core_eoi,
+	.irq_bus_lock = octeon_irq_core_bus_lock,
+	.irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock,
+
+	.irq_cpu_online = octeon_irq_core_eoi,
+	.irq_cpu_offline = octeon_irq_core_ack,
+	.flags = IRQCHIP_ONOFFLINE_ENABLED,
+};
+
+static void __init octeon_irq_init_core(void)
+{
+	int i;
+	int irq;
+	struct octeon_core_chip_data *cd;
+
+	for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) {
+		cd = &octeon_irq_core_chip_data[i];
+		cd->current_en = false;
+		cd->desired_en = false;
+		cd->bit = i;
+		mutex_init(&cd->core_irq_mutex);
+
+		irq = OCTEON_IRQ_SW0 + i;
+		irq_set_chip_data(irq, cd);
+		irq_set_chip_and_handler(irq, &octeon_irq_chip_core,
+					 handle_percpu_irq);
+	}
+}
+
+static int next_cpu_for_irq(struct irq_data *data)
+{
+
+#ifdef CONFIG_SMP
+	int cpu;
+	int weight = cpumask_weight(data->affinity);
+	struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+	if (weight > 1) {
+		cpu = cd->current_cpu;
+		for (;;) {
+			cpu = cpumask_next(cpu, data->affinity);
+			if (cpu >= nr_cpu_ids) {
+				cpu = -1;
+				continue;
+			} else if (cpumask_test_cpu(cpu, cpu_online_mask)) {
+				break;
+			}
+		}
+	} else if (weight == 1) {
+		cpu = cpumask_first(data->affinity);
+	} else {
+		cpu = smp_processor_id();
+	}
+	cd->current_cpu = cpu;
+	return cpu;
+#else
+	return smp_processor_id();
+#endif
+}
+
+static void octeon_irq_ciu_enable(struct irq_data *data)
+{
+	int cpu = next_cpu_for_irq(data);
+	int coreid = octeon_coreid_for_cpu(cpu);
+	unsigned long *pen;
+	unsigned long flags;
+	struct octeon_ciu_chip_data *cd;
+	raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	raw_spin_lock_irqsave(lock, flags);
+	if (cd->line == 0) {
+		pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+		__set_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+	} else {
+		pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+		__set_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
+	}
+	raw_spin_unlock_irqrestore(lock, flags);
+}
+
+static void octeon_irq_ciu_enable_local(struct irq_data *data)
+{
+	unsigned long *pen;
+	unsigned long flags;
+	struct octeon_ciu_chip_data *cd;
+	raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	raw_spin_lock_irqsave(lock, flags);
+	if (cd->line == 0) {
+		pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
+		__set_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
+	} else {
+		pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
+		__set_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
+	}
+	raw_spin_unlock_irqrestore(lock, flags);
+}
+
+static void octeon_irq_ciu_disable_local(struct irq_data *data)
+{
+	unsigned long *pen;
+	unsigned long flags;
+	struct octeon_ciu_chip_data *cd;
+	raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	raw_spin_lock_irqsave(lock, flags);
+	if (cd->line == 0) {
+		pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
+		__clear_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
+	} else {
+		pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
+		__clear_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
+	}
+	raw_spin_unlock_irqrestore(lock, flags);
+}
+
+static void octeon_irq_ciu_disable_all(struct irq_data *data)
+{
+	unsigned long flags;
+	unsigned long *pen;
+	int cpu;
+	struct octeon_ciu_chip_data *cd;
+	raw_spinlock_t *lock;
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	for_each_online_cpu(cpu) {
+		int coreid = octeon_coreid_for_cpu(cpu);
+		lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+		if (cd->line == 0)
+			pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+		else
+			pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+
+		raw_spin_lock_irqsave(lock, flags);
+		__clear_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		if (cd->line == 0)
+			cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+		else
+			cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
+		raw_spin_unlock_irqrestore(lock, flags);
+	}
+}
+
+static void octeon_irq_ciu_enable_all(struct irq_data *data)
+{
+	unsigned long flags;
+	unsigned long *pen;
+	int cpu;
+	struct octeon_ciu_chip_data *cd;
+	raw_spinlock_t *lock;
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	for_each_online_cpu(cpu) {
+		int coreid = octeon_coreid_for_cpu(cpu);
+		lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+		if (cd->line == 0)
+			pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+		else
+			pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+
+		raw_spin_lock_irqsave(lock, flags);
+		__set_bit(cd->bit, pen);
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+		if (cd->line == 0)
+			cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+		else
+			cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
+		raw_spin_unlock_irqrestore(lock, flags);
+	}
+}
+
+/*
+ * Enable the irq on the next core in the affinity set for chips that
+ * have the EN*_W1{S,C} registers.
+ */
+static void octeon_irq_ciu_enable_v2(struct irq_data *data)
+{
+	u64 mask;
+	int cpu = next_cpu_for_irq(data);
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	/*
+	 * Called under the desc lock, so these should never get out
+	 * of sync.
+	 */
+	if (cd->line == 0) {
+		int index = octeon_coreid_for_cpu(cpu) * 2;
+		set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
+		cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
+	} else {
+		int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
+		set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
+		cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
+	}
+}
+
+/*
+ * Enable the irq in the sum2 registers.
+ */
+static void octeon_irq_ciu_enable_sum2(struct irq_data *data)
+{
+	u64 mask;
+	int cpu = next_cpu_for_irq(data);
+	int index = octeon_coreid_for_cpu(cpu);
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
+}
+
+/*
+ * Disable the irq in the sum2 registers.
+ */
+static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data)
+{
+	u64 mask;
+	int cpu = next_cpu_for_irq(data);
+	int index = octeon_coreid_for_cpu(cpu);
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
+}
+
+static void octeon_irq_ciu_ack_sum2(struct irq_data *data)
+{
+	u64 mask;
+	int cpu = next_cpu_for_irq(data);
+	int index = octeon_coreid_for_cpu(cpu);
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask);
+}
+
+static void octeon_irq_ciu_disable_all_sum2(struct irq_data *data)
+{
+	int cpu;
+	struct octeon_ciu_chip_data *cd;
+	u64 mask;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	for_each_online_cpu(cpu) {
+		int coreid = octeon_coreid_for_cpu(cpu);
+
+		cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(coreid), mask);
+	}
+}
+
+/*
+ * Enable the irq on the current CPU for chips that
+ * have the EN*_W1{S,C} registers.
+ */
+static void octeon_irq_ciu_enable_local_v2(struct irq_data *data)
+{
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	if (cd->line == 0) {
+		int index = cvmx_get_core_num() * 2;
+		set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
+		cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
+	} else {
+		int index = cvmx_get_core_num() * 2 + 1;
+		set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
+		cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
+	}
+}
+
+static void octeon_irq_ciu_disable_local_v2(struct irq_data *data)
+{
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	if (cd->line == 0) {
+		int index = cvmx_get_core_num() * 2;
+		clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
+		cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
+	} else {
+		int index = cvmx_get_core_num() * 2 + 1;
+		clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
+		cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
+	}
+}
+
+/*
+ * Write to the W1C bit in CVMX_CIU_INTX_SUM0 to clear the irq.
+ */
+static void octeon_irq_ciu_ack(struct irq_data *data)
+{
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	if (cd->line == 0) {
+		int index = cvmx_get_core_num() * 2;
+		cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask);
+	} else {
+		cvmx_write_csr(CVMX_CIU_INT_SUM1, mask);
+	}
+}
+
+/*
+ * Disable the irq on the all cores for chips that have the EN*_W1{S,C}
+ * registers.
+ */
+static void octeon_irq_ciu_disable_all_v2(struct irq_data *data)
+{
+	int cpu;
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	if (cd->line == 0) {
+		for_each_online_cpu(cpu) {
+			int index = octeon_coreid_for_cpu(cpu) * 2;
+			clear_bit(cd->bit,
+				&per_cpu(octeon_irq_ciu0_en_mirror, cpu));
+			cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
+		}
+	} else {
+		for_each_online_cpu(cpu) {
+			int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
+			clear_bit(cd->bit,
+				&per_cpu(octeon_irq_ciu1_en_mirror, cpu));
+			cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
+		}
+	}
+}
+
+/*
+ * Enable the irq on the all cores for chips that have the EN*_W1{S,C}
+ * registers.
+ */
+static void octeon_irq_ciu_enable_all_v2(struct irq_data *data)
+{
+	int cpu;
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	if (cd->line == 0) {
+		for_each_online_cpu(cpu) {
+			int index = octeon_coreid_for_cpu(cpu) * 2;
+			set_bit(cd->bit,
+				&per_cpu(octeon_irq_ciu0_en_mirror, cpu));
+			cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
+		}
+	} else {
+		for_each_online_cpu(cpu) {
+			int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
+			set_bit(cd->bit,
+				&per_cpu(octeon_irq_ciu1_en_mirror, cpu));
+			cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
+		}
+	}
+}
+
+static void octeon_irq_gpio_setup(struct irq_data *data)
+{
+	union cvmx_gpio_bit_cfgx cfg;
+	struct octeon_ciu_chip_data *cd;
+	u32 t = irqd_get_trigger_type(data);
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	cfg.u64 = 0;
+	cfg.s.int_en = 1;
+	cfg.s.int_type = (t & IRQ_TYPE_EDGE_BOTH) != 0;
+	cfg.s.rx_xor = (t & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) != 0;
+
+	/* 140 nS glitch filter*/
+	cfg.s.fil_cnt = 7;
+	cfg.s.fil_sel = 3;
+
+	cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64);
+}
+
+static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data)
+{
+	octeon_irq_gpio_setup(data);
+	octeon_irq_ciu_enable_v2(data);
+}
+
+static void octeon_irq_ciu_enable_gpio(struct irq_data *data)
+{
+	octeon_irq_gpio_setup(data);
+	octeon_irq_ciu_enable(data);
+}
+
+static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t)
+{
+	irqd_set_trigger_type(data, t);
+	octeon_irq_gpio_setup(data);
+
+	return IRQ_SET_MASK_OK;
+}
+
+static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data)
+{
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
+
+	octeon_irq_ciu_disable_all_v2(data);
+}
+
+static void octeon_irq_ciu_disable_gpio(struct irq_data *data)
+{
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
+
+	octeon_irq_ciu_disable_all(data);
+}
+
+static void octeon_irq_ciu_gpio_ack(struct irq_data *data)
+{
+	struct octeon_ciu_chip_data *cd;
+	u64 mask;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->gpio_line);
+
+	cvmx_write_csr(CVMX_GPIO_INT_CLR, mask);
+}
+
+static void octeon_irq_handle_trigger(unsigned int irq, struct irq_desc *desc)
+{
+	if (irq_get_trigger_type(irq) & IRQ_TYPE_EDGE_BOTH)
+		handle_edge_irq(irq, desc);
+	else
+		handle_level_irq(irq, desc);
+}
+
+#ifdef CONFIG_SMP
+
+static void octeon_irq_cpu_offline_ciu(struct irq_data *data)
+{
+	int cpu = smp_processor_id();
+	cpumask_t new_affinity;
+
+	if (!cpumask_test_cpu(cpu, data->affinity))
+		return;
+
+	if (cpumask_weight(data->affinity) > 1) {
+		/*
+		 * It has multi CPU affinity, just remove this CPU
+		 * from the affinity set.
+		 */
+		cpumask_copy(&new_affinity, data->affinity);
+		cpumask_clear_cpu(cpu, &new_affinity);
+	} else {
+		/* Otherwise, put it on lowest numbered online CPU. */
+		cpumask_clear(&new_affinity);
+		cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
+	}
+	irq_set_affinity_locked(data, &new_affinity, false);
+}
+
+static int octeon_irq_ciu_set_affinity(struct irq_data *data,
+				       const struct cpumask *dest, bool force)
+{
+	int cpu;
+	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
+	unsigned long flags;
+	struct octeon_ciu_chip_data *cd;
+	unsigned long *pen;
+	raw_spinlock_t *lock;
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	/*
+	 * For non-v2 CIU, we will allow only single CPU affinity.
+	 * This removes the need to do locking in the .ack/.eoi
+	 * functions.
+	 */
+	if (cpumask_weight(dest) != 1)
+		return -EINVAL;
+
+	if (!enable_one)
+		return 0;
+
+
+	for_each_online_cpu(cpu) {
+		int coreid = octeon_coreid_for_cpu(cpu);
+
+		lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+		raw_spin_lock_irqsave(lock, flags);
+
+		if (cd->line == 0)
+			pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+		else
+			pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+
+		if (cpumask_test_cpu(cpu, dest) && enable_one) {
+			enable_one = 0;
+			__set_bit(cd->bit, pen);
+		} else {
+			__clear_bit(cd->bit, pen);
+		}
+		/*
+		 * Must be visible to octeon_irq_ip{2,3}_ciu() before
+		 * enabling the irq.
+		 */
+		wmb();
+
+		if (cd->line == 0)
+			cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+		else
+			cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
+
+		raw_spin_unlock_irqrestore(lock, flags);
+	}
+	return 0;
+}
+
+/*
+ * Set affinity for the irq for chips that have the EN*_W1{S,C}
+ * registers.
+ */
+static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data,
+					  const struct cpumask *dest,
+					  bool force)
+{
+	int cpu;
+	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	if (!enable_one)
+		return 0;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << cd->bit;
+
+	if (cd->line == 0) {
+		for_each_online_cpu(cpu) {
+			unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+			int index = octeon_coreid_for_cpu(cpu) * 2;
+			if (cpumask_test_cpu(cpu, dest) && enable_one) {
+				enable_one = false;
+				set_bit(cd->bit, pen);
+				cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
+			} else {
+				clear_bit(cd->bit, pen);
+				cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
+			}
+		}
+	} else {
+		for_each_online_cpu(cpu) {
+			unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+			int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
+			if (cpumask_test_cpu(cpu, dest) && enable_one) {
+				enable_one = false;
+				set_bit(cd->bit, pen);
+				cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
+			} else {
+				clear_bit(cd->bit, pen);
+				cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
+			}
+		}
+	}
+	return 0;
+}
+
+static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data,
+					    const struct cpumask *dest,
+					    bool force)
+{
+	int cpu;
+	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	if (!enable_one)
+		return 0;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << cd->bit;
+
+	for_each_online_cpu(cpu) {
+		int index = octeon_coreid_for_cpu(cpu);
+
+		if (cpumask_test_cpu(cpu, dest) && enable_one) {
+			enable_one = false;
+			cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
+		} else {
+			cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
+		}
+	}
+	return 0;
+}
+#endif
+
+/*
+ * Newer octeon chips have support for lockless CIU operation.
+ */
+static struct irq_chip octeon_irq_chip_ciu_v2 = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable_v2,
+	.irq_disable = octeon_irq_ciu_disable_all_v2,
+	.irq_mask = octeon_irq_ciu_disable_local_v2,
+	.irq_unmask = octeon_irq_ciu_enable_v2,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu_v2_edge = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable_v2,
+	.irq_disable = octeon_irq_ciu_disable_all_v2,
+	.irq_ack = octeon_irq_ciu_ack,
+	.irq_mask = octeon_irq_ciu_disable_local_v2,
+	.irq_unmask = octeon_irq_ciu_enable_v2,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+/*
+ * Newer octeon chips have support for lockless CIU operation.
+ */
+static struct irq_chip octeon_irq_chip_ciu_sum2 = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable_sum2,
+	.irq_disable = octeon_irq_ciu_disable_all_sum2,
+	.irq_mask = octeon_irq_ciu_disable_local_sum2,
+	.irq_unmask = octeon_irq_ciu_enable_sum2,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu_sum2_edge = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable_sum2,
+	.irq_disable = octeon_irq_ciu_disable_all_sum2,
+	.irq_ack = octeon_irq_ciu_ack_sum2,
+	.irq_mask = octeon_irq_ciu_disable_local_sum2,
+	.irq_unmask = octeon_irq_ciu_enable_sum2,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable,
+	.irq_disable = octeon_irq_ciu_disable_all,
+	.irq_mask = octeon_irq_ciu_disable_local,
+	.irq_unmask = octeon_irq_ciu_enable,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu_edge = {
+	.name = "CIU",
+	.irq_enable = octeon_irq_ciu_enable,
+	.irq_disable = octeon_irq_ciu_disable_all,
+	.irq_ack = octeon_irq_ciu_ack,
+	.irq_mask = octeon_irq_ciu_disable_local,
+	.irq_unmask = octeon_irq_ciu_enable,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+/* The mbox versions don't do any affinity or round-robin. */
+static struct irq_chip octeon_irq_chip_ciu_mbox_v2 = {
+	.name = "CIU-M",
+	.irq_enable = octeon_irq_ciu_enable_all_v2,
+	.irq_disable = octeon_irq_ciu_disable_all_v2,
+	.irq_ack = octeon_irq_ciu_disable_local_v2,
+	.irq_eoi = octeon_irq_ciu_enable_local_v2,
+
+	.irq_cpu_online = octeon_irq_ciu_enable_local_v2,
+	.irq_cpu_offline = octeon_irq_ciu_disable_local_v2,
+	.flags = IRQCHIP_ONOFFLINE_ENABLED,
+};
+
+static struct irq_chip octeon_irq_chip_ciu_mbox = {
+	.name = "CIU-M",
+	.irq_enable = octeon_irq_ciu_enable_all,
+	.irq_disable = octeon_irq_ciu_disable_all,
+	.irq_ack = octeon_irq_ciu_disable_local,
+	.irq_eoi = octeon_irq_ciu_enable_local,
+
+	.irq_cpu_online = octeon_irq_ciu_enable_local,
+	.irq_cpu_offline = octeon_irq_ciu_disable_local,
+	.flags = IRQCHIP_ONOFFLINE_ENABLED,
+};
+
+static struct irq_chip octeon_irq_chip_ciu_gpio_v2 = {
+	.name = "CIU-GPIO",
+	.irq_enable = octeon_irq_ciu_enable_gpio_v2,
+	.irq_disable = octeon_irq_ciu_disable_gpio_v2,
+	.irq_ack = octeon_irq_ciu_gpio_ack,
+	.irq_mask = octeon_irq_ciu_disable_local_v2,
+	.irq_unmask = octeon_irq_ciu_enable_v2,
+	.irq_set_type = octeon_irq_ciu_gpio_set_type,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+	.flags = IRQCHIP_SET_TYPE_MASKED,
+};
+
+static struct irq_chip octeon_irq_chip_ciu_gpio = {
+	.name = "CIU-GPIO",
+	.irq_enable = octeon_irq_ciu_enable_gpio,
+	.irq_disable = octeon_irq_ciu_disable_gpio,
+	.irq_mask = octeon_irq_ciu_disable_local,
+	.irq_unmask = octeon_irq_ciu_enable,
+	.irq_ack = octeon_irq_ciu_gpio_ack,
+	.irq_set_type = octeon_irq_ciu_gpio_set_type,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+	.flags = IRQCHIP_SET_TYPE_MASKED,
+};
+
+/*
+ * Watchdog interrupts are special.  They are associated with a single
+ * core, so we hardwire the affinity to that core.
+ */
+static void octeon_irq_ciu_wd_enable(struct irq_data *data)
+{
+	unsigned long flags;
+	unsigned long *pen;
+	int coreid = data->irq - OCTEON_IRQ_WDOG0;	/* Bit 0-63 of EN1 */
+	int cpu = octeon_cpu_for_coreid(coreid);
+	raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+
+	raw_spin_lock_irqsave(lock, flags);
+	pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+	__set_bit(coreid, pen);
+	/*
+	 * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling
+	 * the irq.
+	 */
+	wmb();
+	cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
+	raw_spin_unlock_irqrestore(lock, flags);
+}
+
+/*
+ * Watchdog interrupts are special.  They are associated with a single
+ * core, so we hardwire the affinity to that core.
+ */
+static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data)
+{
+	int coreid = data->irq - OCTEON_IRQ_WDOG0;
+	int cpu = octeon_cpu_for_coreid(coreid);
+
+	set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
+	cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid);
+}
+
+
+static struct irq_chip octeon_irq_chip_ciu_wd_v2 = {
+	.name = "CIU-W",
+	.irq_enable = octeon_irq_ciu1_wd_enable_v2,
+	.irq_disable = octeon_irq_ciu_disable_all_v2,
+	.irq_mask = octeon_irq_ciu_disable_local_v2,
+	.irq_unmask = octeon_irq_ciu_enable_local_v2,
+};
+
+static struct irq_chip octeon_irq_chip_ciu_wd = {
+	.name = "CIU-W",
+	.irq_enable = octeon_irq_ciu_wd_enable,
+	.irq_disable = octeon_irq_ciu_disable_all,
+	.irq_mask = octeon_irq_ciu_disable_local,
+	.irq_unmask = octeon_irq_ciu_enable_local,
+};
+
+static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit)
+{
+	bool edge = false;
+
+	if (line == 0)
+		switch (bit) {
+		case 48 ... 49: /* GMX DRP */
+		case 50: /* IPD_DRP */
+		case 52 ... 55: /* Timers */
+		case 58: /* MPI */
+			edge = true;
+			break;
+		default:
+			break;
+		}
+	else /* line == 1 */
+		switch (bit) {
+		case 47: /* PTP */
+			edge = true;
+			break;
+		default:
+			break;
+		}
+	return edge;
+}
+
+struct octeon_irq_gpio_domain_data {
+	unsigned int base_hwirq;
+};
+
+static int octeon_irq_gpio_xlat(struct irq_domain *d,
+				struct device_node *node,
+				const u32 *intspec,
+				unsigned int intsize,
+				unsigned long *out_hwirq,
+				unsigned int *out_type)
+{
+	unsigned int type;
+	unsigned int pin;
+	unsigned int trigger;
+
+	if (d->of_node != node)
+		return -EINVAL;
+
+	if (intsize < 2)
+		return -EINVAL;
+
+	pin = intspec[0];
+	if (pin >= 16)
+		return -EINVAL;
+
+	trigger = intspec[1];
+
+	switch (trigger) {
+	case 1:
+		type = IRQ_TYPE_EDGE_RISING;
+		break;
+	case 2:
+		type = IRQ_TYPE_EDGE_FALLING;
+		break;
+	case 4:
+		type = IRQ_TYPE_LEVEL_HIGH;
+		break;
+	case 8:
+		type = IRQ_TYPE_LEVEL_LOW;
+		break;
+	default:
+		pr_err("Error: (%s) Invalid irq trigger specification: %x\n",
+		       node->name,
+		       trigger);
+		type = IRQ_TYPE_LEVEL_LOW;
+		break;
+	}
+	*out_type = type;
+	*out_hwirq = pin;
+
+	return 0;
+}
+
+static int octeon_irq_ciu_xlat(struct irq_domain *d,
+			       struct device_node *node,
+			       const u32 *intspec,
+			       unsigned int intsize,
+			       unsigned long *out_hwirq,
+			       unsigned int *out_type)
+{
+	unsigned int ciu, bit;
+	struct octeon_irq_ciu_domain_data *dd = d->host_data;
+
+	ciu = intspec[0];
+	bit = intspec[1];
+
+	if (ciu >= dd->num_sum || bit > 63)
+		return -EINVAL;
+
+	*out_hwirq = (ciu << 6) | bit;
+	*out_type = 0;
+
+	return 0;
+}
+
+static struct irq_chip *octeon_irq_ciu_chip;
+static struct irq_chip *octeon_irq_ciu_chip_edge;
+static struct irq_chip *octeon_irq_gpio_chip;
+
+static bool octeon_irq_virq_in_range(unsigned int virq)
+{
+	/* We cannot let it overflow the mapping array. */
+	if (virq < (1ul << 8 * sizeof(octeon_irq_ciu_to_irq[0][0])))
+		return true;
+
+	WARN_ONCE(true, "virq out of range %u.\n", virq);
+	return false;
+}
+
+static int octeon_irq_ciu_map(struct irq_domain *d,
+			      unsigned int virq, irq_hw_number_t hw)
+{
+	int rv;
+	unsigned int line = hw >> 6;
+	unsigned int bit = hw & 63;
+	struct octeon_irq_ciu_domain_data *dd = d->host_data;
+
+	if (!octeon_irq_virq_in_range(virq))
+		return -EINVAL;
+
+	/* Don't map irq if it is reserved for GPIO. */
+	if (line == 0 && bit >= 16 && bit <32)
+		return 0;
+
+	if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0)
+		return -EINVAL;
+
+	if (line == 2) {
+		if (octeon_irq_ciu_is_edge(line, bit))
+			rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+				&octeon_irq_chip_ciu_sum2_edge,
+				handle_edge_irq);
+		else
+			rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+				&octeon_irq_chip_ciu_sum2,
+				handle_level_irq);
+	} else {
+		if (octeon_irq_ciu_is_edge(line, bit))
+			rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+				octeon_irq_ciu_chip_edge,
+				handle_edge_irq);
+		else
+			rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+				octeon_irq_ciu_chip,
+				handle_level_irq);
+	}
+	return rv;
+}
+
+static int octeon_irq_gpio_map(struct irq_domain *d,
+			       unsigned int virq, irq_hw_number_t hw)
+{
+	struct octeon_irq_gpio_domain_data *gpiod = d->host_data;
+	unsigned int line, bit;
+	int r;
+
+	if (!octeon_irq_virq_in_range(virq))
+		return -EINVAL;
+
+	line = (hw + gpiod->base_hwirq) >> 6;
+	bit = (hw + gpiod->base_hwirq) & 63;
+	if (line > ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
+		octeon_irq_ciu_to_irq[line][bit] != 0)
+		return -EINVAL;
+
+	r = octeon_irq_set_ciu_mapping(virq, line, bit, hw,
+		octeon_irq_gpio_chip, octeon_irq_handle_trigger);
+	return r;
+}
+
+static struct irq_domain_ops octeon_irq_domain_ciu_ops = {
+	.map = octeon_irq_ciu_map,
+	.unmap = octeon_irq_free_cd,
+	.xlate = octeon_irq_ciu_xlat,
+};
+
+static struct irq_domain_ops octeon_irq_domain_gpio_ops = {
+	.map = octeon_irq_gpio_map,
+	.unmap = octeon_irq_free_cd,
+	.xlate = octeon_irq_gpio_xlat,
+};
+
+static void octeon_irq_ip2_ciu(void)
+{
+	const unsigned long core_id = cvmx_get_core_num();
+	u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
+
+	ciu_sum &= __this_cpu_read(octeon_irq_ciu0_en_mirror);
+	if (likely(ciu_sum)) {
+		int bit = fls64(ciu_sum) - 1;
+		int irq = octeon_irq_ciu_to_irq[0][bit];
+		if (likely(irq))
+			do_IRQ(irq);
+		else
+			spurious_interrupt();
+	} else {
+		spurious_interrupt();
+	}
+}
+
+static void octeon_irq_ip3_ciu(void)
+{
+	u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
+
+	ciu_sum &= __this_cpu_read(octeon_irq_ciu1_en_mirror);
+	if (likely(ciu_sum)) {
+		int bit = fls64(ciu_sum) - 1;
+		int irq = octeon_irq_ciu_to_irq[1][bit];
+		if (likely(irq))
+			do_IRQ(irq);
+		else
+			spurious_interrupt();
+	} else {
+		spurious_interrupt();
+	}
+}
+
+static void octeon_irq_ip4_ciu(void)
+{
+	int coreid = cvmx_get_core_num();
+	u64 ciu_sum = cvmx_read_csr(CVMX_CIU_SUM2_PPX_IP4(coreid));
+	u64 ciu_en = cvmx_read_csr(CVMX_CIU_EN2_PPX_IP4(coreid));
+
+	ciu_sum &= ciu_en;
+	if (likely(ciu_sum)) {
+		int bit = fls64(ciu_sum) - 1;
+		int irq = octeon_irq_ciu_to_irq[2][bit];
+
+		if (likely(irq))
+			do_IRQ(irq);
+		else
+			spurious_interrupt();
+	} else {
+		spurious_interrupt();
+	}
+}
+
+static bool octeon_irq_use_ip4;
+
+static void octeon_irq_local_enable_ip4(void *arg)
+{
+	set_c0_status(STATUSF_IP4);
+}
+
+static void octeon_irq_ip4_mask(void)
+{
+	clear_c0_status(STATUSF_IP4);
+	spurious_interrupt();
+}
+
+static void (*octeon_irq_ip2)(void);
+static void (*octeon_irq_ip3)(void);
+static void (*octeon_irq_ip4)(void);
+
+void (*octeon_irq_setup_secondary)(void);
+
+void octeon_irq_set_ip4_handler(octeon_irq_ip4_handler_t h)
+{
+	octeon_irq_ip4 = h;
+	octeon_irq_use_ip4 = true;
+	on_each_cpu(octeon_irq_local_enable_ip4, NULL, 1);
+}
+
+static void octeon_irq_percpu_enable(void)
+{
+	irq_cpu_online();
+}
+
+static void octeon_irq_init_ciu_percpu(void)
+{
+	int coreid = cvmx_get_core_num();
+
+
+	__this_cpu_write(octeon_irq_ciu0_en_mirror, 0);
+	__this_cpu_write(octeon_irq_ciu1_en_mirror, 0);
+	wmb();
+	raw_spin_lock_init(this_cpu_ptr(&octeon_irq_ciu_spinlock));
+	/*
+	 * Disable All CIU Interrupts. The ones we need will be
+	 * enabled later.  Read the SUM register so we know the write
+	 * completed.
+	 */
+	cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0);
+	cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
+	cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
+	cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
+	cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2)));
+}
+
+static void octeon_irq_init_ciu2_percpu(void)
+{
+	u64 regx, ipx;
+	int coreid = cvmx_get_core_num();
+	u64 base = CVMX_CIU2_EN_PPX_IP2_WRKQ(coreid);
+
+	/*
+	 * Disable All CIU2 Interrupts. The ones we need will be
+	 * enabled later.  Read the SUM register so we know the write
+	 * completed.
+	 *
+	 * There are 9 registers and 3 IPX levels with strides 0x1000
+	 * and 0x200 respectivly.  Use loops to clear them.
+	 */
+	for (regx = 0; regx <= 0x8000; regx += 0x1000) {
+		for (ipx = 0; ipx <= 0x400; ipx += 0x200)
+			cvmx_write_csr(base + regx + ipx, 0);
+	}
+
+	cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid));
+}
+
+static void octeon_irq_setup_secondary_ciu(void)
+{
+	octeon_irq_init_ciu_percpu();
+	octeon_irq_percpu_enable();
+
+	/* Enable the CIU lines */
+	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
+	if (octeon_irq_use_ip4)
+		set_c0_status(STATUSF_IP4);
+	else
+		clear_c0_status(STATUSF_IP4);
+}
+
+static void octeon_irq_setup_secondary_ciu2(void)
+{
+	octeon_irq_init_ciu2_percpu();
+	octeon_irq_percpu_enable();
+
+	/* Enable the CIU lines */
+	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
+	if (octeon_irq_use_ip4)
+		set_c0_status(STATUSF_IP4);
+	else
+		clear_c0_status(STATUSF_IP4);
+}
+
+static int __init octeon_irq_init_ciu(
+	struct device_node *ciu_node, struct device_node *parent)
+{
+	unsigned int i, r;
+	struct irq_chip *chip;
+	struct irq_chip *chip_edge;
+	struct irq_chip *chip_mbox;
+	struct irq_chip *chip_wd;
+	struct irq_domain *ciu_domain = NULL;
+	struct octeon_irq_ciu_domain_data *dd;
+
+	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
+	if (!dd)
+		return -ENOMEM;
+
+	octeon_irq_init_ciu_percpu();
+	octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu;
+
+	octeon_irq_ip2 = octeon_irq_ip2_ciu;
+	octeon_irq_ip3 = octeon_irq_ip3_ciu;
+	if ((OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3())
+		&& !OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+		octeon_irq_ip4 =  octeon_irq_ip4_ciu;
+		dd->num_sum = 3;
+		octeon_irq_use_ip4 = true;
+	} else {
+		octeon_irq_ip4 = octeon_irq_ip4_mask;
+		dd->num_sum = 2;
+		octeon_irq_use_ip4 = false;
+	}
+	if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) ||
+	    OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
+	    OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
+	    OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) {
+		chip = &octeon_irq_chip_ciu_v2;
+		chip_edge = &octeon_irq_chip_ciu_v2_edge;
+		chip_mbox = &octeon_irq_chip_ciu_mbox_v2;
+		chip_wd = &octeon_irq_chip_ciu_wd_v2;
+		octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2;
+	} else {
+		chip = &octeon_irq_chip_ciu;
+		chip_edge = &octeon_irq_chip_ciu_edge;
+		chip_mbox = &octeon_irq_chip_ciu_mbox;
+		chip_wd = &octeon_irq_chip_ciu_wd;
+		octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio;
+	}
+	octeon_irq_ciu_chip = chip;
+	octeon_irq_ciu_chip_edge = chip_edge;
+
+	/* Mips internal */
+	octeon_irq_init_core();
+
+	ciu_domain = irq_domain_add_tree(
+		ciu_node, &octeon_irq_domain_ciu_ops, dd);
+	irq_set_default_host(ciu_domain);
+
+	/* CIU_0 */
+	for (i = 0; i < 16; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0);
+		if (r)
+			goto err;
+	}
+
+	r = octeon_irq_set_ciu_mapping(
+		OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
+	if (r)
+		goto err;
+	r = octeon_irq_set_ciu_mapping(
+		OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq);
+	if (r)
+		goto err;
+
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36);
+		if (r)
+			goto err;
+	}
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40);
+		if (r)
+			goto err;
+	}
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45);
+	if (r)
+		goto err;
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46);
+	if (r)
+		goto err;
+
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
+		if (r)
+			goto err;
+	}
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56);
+	if (r)
+		goto err;
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
+	if (r)
+		goto err;
+
+	/* CIU_1 */
+	for (i = 0; i < 16; i++) {
+		r = octeon_irq_set_ciu_mapping(
+			i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd,
+			handle_level_irq);
+		if (r)
+			goto err;
+	}
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17);
+	if (r)
+		goto err;
+
+	/* Enable the CIU lines */
+	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
+	if (octeon_irq_use_ip4)
+		set_c0_status(STATUSF_IP4);
+	else
+		clear_c0_status(STATUSF_IP4);
+
+	return 0;
+err:
+	return r;
+}
+
+static int __init octeon_irq_init_gpio(
+	struct device_node *gpio_node, struct device_node *parent)
+{
+	struct octeon_irq_gpio_domain_data *gpiod;
+	u32 interrupt_cells;
+	unsigned int base_hwirq;
+	int r;
+
+	r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells);
+	if (r)
+		return r;
+
+	if (interrupt_cells == 1) {
+		u32 v;
+
+		r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v);
+		if (r) {
+			pr_warn("No \"interrupts\" property.\n");
+			return r;
+		}
+		base_hwirq = v;
+	} else if (interrupt_cells == 2) {
+		u32 v0, v1;
+
+		r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0);
+		if (r) {
+			pr_warn("No \"interrupts\" property.\n");
+			return r;
+		}
+		r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1);
+		if (r) {
+			pr_warn("No \"interrupts\" property.\n");
+			return r;
+		}
+		base_hwirq = (v0 << 6) | v1;
+	} else {
+		pr_warn("Bad \"#interrupt-cells\" property: %u\n",
+			interrupt_cells);
+		return -EINVAL;
+	}
+
+	gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL);
+	if (gpiod) {
+		/* gpio domain host_data is the base hwirq number. */
+		gpiod->base_hwirq = base_hwirq;
+		irq_domain_add_linear(
+			gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod);
+	} else {
+		pr_warn("Cannot allocate memory for GPIO irq_domain.\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+/*
+ * Watchdog interrupts are special.  They are associated with a single
+ * core, so we hardwire the affinity to that core.
+ */
+static void octeon_irq_ciu2_wd_enable(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = data->irq - OCTEON_IRQ_WDOG0;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
+		(0x1000ull * cd->line);
+	cvmx_write_csr(en_addr, mask);
+
+}
+
+static void octeon_irq_ciu2_enable(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int cpu = next_cpu_for_irq(data);
+	int coreid = octeon_coreid_for_cpu(cpu);
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
+		(0x1000ull * cd->line);
+	cvmx_write_csr(en_addr, mask);
+}
+
+static void octeon_irq_ciu2_enable_local(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = cvmx_get_core_num();
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
+		(0x1000ull * cd->line);
+	cvmx_write_csr(en_addr, mask);
+
+}
+
+static void octeon_irq_ciu2_disable_local(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = cvmx_get_core_num();
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) +
+		(0x1000ull * cd->line);
+	cvmx_write_csr(en_addr, mask);
+
+}
+
+static void octeon_irq_ciu2_ack(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = cvmx_get_core_num();
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line);
+	cvmx_write_csr(en_addr, mask);
+
+}
+
+static void octeon_irq_ciu2_disable_all(struct irq_data *data)
+{
+	int cpu;
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << (cd->bit);
+
+	for_each_online_cpu(cpu) {
+		u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
+			octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line);
+		cvmx_write_csr(en_addr, mask);
+	}
+}
+
+static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data)
+{
+	int cpu;
+	u64 mask;
+
+	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
+
+	for_each_online_cpu(cpu) {
+		u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(
+			octeon_coreid_for_cpu(cpu));
+		cvmx_write_csr(en_addr, mask);
+	}
+}
+
+static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data)
+{
+	int cpu;
+	u64 mask;
+
+	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
+
+	for_each_online_cpu(cpu) {
+		u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(
+			octeon_coreid_for_cpu(cpu));
+		cvmx_write_csr(en_addr, mask);
+	}
+}
+
+static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = cvmx_get_core_num();
+
+	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
+	en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid);
+	cvmx_write_csr(en_addr, mask);
+}
+
+static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data)
+{
+	u64 mask;
+	u64 en_addr;
+	int coreid = cvmx_get_core_num();
+
+	mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
+	en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid);
+	cvmx_write_csr(en_addr, mask);
+}
+
+#ifdef CONFIG_SMP
+static int octeon_irq_ciu2_set_affinity(struct irq_data *data,
+					const struct cpumask *dest, bool force)
+{
+	int cpu;
+	bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
+	u64 mask;
+	struct octeon_ciu_chip_data *cd;
+
+	if (!enable_one)
+		return 0;
+
+	cd = irq_data_get_irq_chip_data(data);
+	mask = 1ull << cd->bit;
+
+	for_each_online_cpu(cpu) {
+		u64 en_addr;
+		if (cpumask_test_cpu(cpu, dest) && enable_one) {
+			enable_one = false;
+			en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(
+				octeon_coreid_for_cpu(cpu)) +
+				(0x1000ull * cd->line);
+		} else {
+			en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
+				octeon_coreid_for_cpu(cpu)) +
+				(0x1000ull * cd->line);
+		}
+		cvmx_write_csr(en_addr, mask);
+	}
+
+	return 0;
+}
+#endif
+
+static void octeon_irq_ciu2_enable_gpio(struct irq_data *data)
+{
+	octeon_irq_gpio_setup(data);
+	octeon_irq_ciu2_enable(data);
+}
+
+static void octeon_irq_ciu2_disable_gpio(struct irq_data *data)
+{
+	struct octeon_ciu_chip_data *cd;
+
+	cd = irq_data_get_irq_chip_data(data);
+
+	cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
+
+	octeon_irq_ciu2_disable_all(data);
+}
+
+static struct irq_chip octeon_irq_chip_ciu2 = {
+	.name = "CIU2-E",
+	.irq_enable = octeon_irq_ciu2_enable,
+	.irq_disable = octeon_irq_ciu2_disable_all,
+	.irq_mask = octeon_irq_ciu2_disable_local,
+	.irq_unmask = octeon_irq_ciu2_enable,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu2_edge = {
+	.name = "CIU2-E",
+	.irq_enable = octeon_irq_ciu2_enable,
+	.irq_disable = octeon_irq_ciu2_disable_all,
+	.irq_ack = octeon_irq_ciu2_ack,
+	.irq_mask = octeon_irq_ciu2_disable_local,
+	.irq_unmask = octeon_irq_ciu2_enable,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+static struct irq_chip octeon_irq_chip_ciu2_mbox = {
+	.name = "CIU2-M",
+	.irq_enable = octeon_irq_ciu2_mbox_enable_all,
+	.irq_disable = octeon_irq_ciu2_mbox_disable_all,
+	.irq_ack = octeon_irq_ciu2_mbox_disable_local,
+	.irq_eoi = octeon_irq_ciu2_mbox_enable_local,
+
+	.irq_cpu_online = octeon_irq_ciu2_mbox_enable_local,
+	.irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local,
+	.flags = IRQCHIP_ONOFFLINE_ENABLED,
+};
+
+static struct irq_chip octeon_irq_chip_ciu2_wd = {
+	.name = "CIU2-W",
+	.irq_enable = octeon_irq_ciu2_wd_enable,
+	.irq_disable = octeon_irq_ciu2_disable_all,
+	.irq_mask = octeon_irq_ciu2_disable_local,
+	.irq_unmask = octeon_irq_ciu2_enable_local,
+};
+
+static struct irq_chip octeon_irq_chip_ciu2_gpio = {
+	.name = "CIU-GPIO",
+	.irq_enable = octeon_irq_ciu2_enable_gpio,
+	.irq_disable = octeon_irq_ciu2_disable_gpio,
+	.irq_ack = octeon_irq_ciu_gpio_ack,
+	.irq_mask = octeon_irq_ciu2_disable_local,
+	.irq_unmask = octeon_irq_ciu2_enable,
+	.irq_set_type = octeon_irq_ciu_gpio_set_type,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = octeon_irq_ciu2_set_affinity,
+	.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+	.flags = IRQCHIP_SET_TYPE_MASKED,
+};
+
+static int octeon_irq_ciu2_xlat(struct irq_domain *d,
+				struct device_node *node,
+				const u32 *intspec,
+				unsigned int intsize,
+				unsigned long *out_hwirq,
+				unsigned int *out_type)
+{
+	unsigned int ciu, bit;
+
+	ciu = intspec[0];
+	bit = intspec[1];
+
+	*out_hwirq = (ciu << 6) | bit;
+	*out_type = 0;
+
+	return 0;
+}
+
+static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit)
+{
+	bool edge = false;
+
+	if (line == 3) /* MIO */
+		switch (bit) {
+		case 2:	 /* IPD_DRP */
+		case 8 ... 11: /* Timers */
+		case 48: /* PTP */
+			edge = true;
+			break;
+		default:
+			break;
+		}
+	else if (line == 6) /* PKT */
+		switch (bit) {
+		case 52 ... 53: /* ILK_DRP */
+		case 8 ... 12:	/* GMX_DRP */
+			edge = true;
+			break;
+		default:
+			break;
+		}
+	return edge;
+}
+
+static int octeon_irq_ciu2_map(struct irq_domain *d,
+			       unsigned int virq, irq_hw_number_t hw)
+{
+	unsigned int line = hw >> 6;
+	unsigned int bit = hw & 63;
+
+	if (!octeon_irq_virq_in_range(virq))
+		return -EINVAL;
+
+	/*
+	 * Don't map irq if it is reserved for GPIO.
+	 * (Line 7 are the GPIO lines.)
+	 */
+	if (line == 7)
+		return 0;
+
+	if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0)
+		return -EINVAL;
+
+	if (octeon_irq_ciu2_is_edge(line, bit))
+		octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+					   &octeon_irq_chip_ciu2_edge,
+					   handle_edge_irq);
+	else
+		octeon_irq_set_ciu_mapping(virq, line, bit, 0,
+					   &octeon_irq_chip_ciu2,
+					   handle_level_irq);
+
+	return 0;
+}
+
+static struct irq_domain_ops octeon_irq_domain_ciu2_ops = {
+	.map = octeon_irq_ciu2_map,
+	.unmap = octeon_irq_free_cd,
+	.xlate = octeon_irq_ciu2_xlat,
+};
+
+static void octeon_irq_ciu2(void)
+{
+	int line;
+	int bit;
+	int irq;
+	u64 src_reg, src, sum;
+	const unsigned long core_id = cvmx_get_core_num();
+
+	sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful;
+
+	if (unlikely(!sum))
+		goto spurious;
+
+	line = fls64(sum) - 1;
+	src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line);
+	src = cvmx_read_csr(src_reg);
+
+	if (unlikely(!src))
+		goto spurious;
+
+	bit = fls64(src) - 1;
+	irq = octeon_irq_ciu_to_irq[line][bit];
+	if (unlikely(!irq))
+		goto spurious;
+
+	do_IRQ(irq);
+	goto out;
+
+spurious:
+	spurious_interrupt();
+out:
+	/* CN68XX pass 1.x has an errata that accessing the ACK registers
+		can stop interrupts from propagating */
+	if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+		cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
+	else
+		cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id));
+	return;
+}
+
+static void octeon_irq_ciu2_mbox(void)
+{
+	int line;
+
+	const unsigned long core_id = cvmx_get_core_num();
+	u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60;
+
+	if (unlikely(!sum))
+		goto spurious;
+
+	line = fls64(sum) - 1;
+
+	do_IRQ(OCTEON_IRQ_MBOX0 + line);
+	goto out;
+
+spurious:
+	spurious_interrupt();
+out:
+	/* CN68XX pass 1.x has an errata that accessing the ACK registers
+		can stop interrupts from propagating */
+	if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+		cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
+	else
+		cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id));
+	return;
+}
+
+static int __init octeon_irq_init_ciu2(
+	struct device_node *ciu_node, struct device_node *parent)
+{
+	unsigned int i, r;
+	struct irq_domain *ciu_domain = NULL;
+
+	octeon_irq_init_ciu2_percpu();
+	octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2;
+
+	octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio;
+	octeon_irq_ip2 = octeon_irq_ciu2;
+	octeon_irq_ip3 = octeon_irq_ciu2_mbox;
+	octeon_irq_ip4 = octeon_irq_ip4_mask;
+
+	/* Mips internal */
+	octeon_irq_init_core();
+
+	ciu_domain = irq_domain_add_tree(
+		ciu_node, &octeon_irq_domain_ciu2_ops, NULL);
+	irq_set_default_host(ciu_domain);
+
+	/* CUI2 */
+	for (i = 0; i < 64; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i);
+		if (r)
+			goto err;
+	}
+
+	for (i = 0; i < 32; i++) {
+		r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0,
+			&octeon_irq_chip_ciu2_wd, handle_level_irq);
+		if (r)
+			goto err;
+	}
+
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8);
+		if (r)
+			goto err;
+	}
+
+	r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 3, 44);
+	if (r)
+		goto err;
+
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);
+		if (r)
+			goto err;
+	}
+
+	for (i = 0; i < 4; i++) {
+		r = octeon_irq_force_ciu_mapping(
+			ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8);
+		if (r)
+			goto err;
+	}
+
+	irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
+	irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
+	irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
+	irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
+
+	/* Enable the CIU lines */
+	set_c0_status(STATUSF_IP3 | STATUSF_IP2);
+	clear_c0_status(STATUSF_IP4);
+	return 0;
+err:
+	return r;
+}
+
+struct octeon_irq_cib_host_data {
+	raw_spinlock_t lock;
+	u64 raw_reg;
+	u64 en_reg;
+	int max_bits;
+};
+
+struct octeon_irq_cib_chip_data {
+	struct octeon_irq_cib_host_data *host_data;
+	int bit;
+};
+
+static void octeon_irq_cib_enable(struct irq_data *data)
+{
+	unsigned long flags;
+	u64 en;
+	struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
+	struct octeon_irq_cib_host_data *host_data = cd->host_data;
+
+	raw_spin_lock_irqsave(&host_data->lock, flags);
+	en = cvmx_read_csr(host_data->en_reg);
+	en |= 1ull << cd->bit;
+	cvmx_write_csr(host_data->en_reg, en);
+	raw_spin_unlock_irqrestore(&host_data->lock, flags);
+}
+
+static void octeon_irq_cib_disable(struct irq_data *data)
+{
+	unsigned long flags;
+	u64 en;
+	struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
+	struct octeon_irq_cib_host_data *host_data = cd->host_data;
+
+	raw_spin_lock_irqsave(&host_data->lock, flags);
+	en = cvmx_read_csr(host_data->en_reg);
+	en &= ~(1ull << cd->bit);
+	cvmx_write_csr(host_data->en_reg, en);
+	raw_spin_unlock_irqrestore(&host_data->lock, flags);
+}
+
+static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t)
+{
+	irqd_set_trigger_type(data, t);
+	return IRQ_SET_MASK_OK;
+}
+
+static struct irq_chip octeon_irq_chip_cib = {
+	.name = "CIB",
+	.irq_enable = octeon_irq_cib_enable,
+	.irq_disable = octeon_irq_cib_disable,
+	.irq_mask = octeon_irq_cib_disable,
+	.irq_unmask = octeon_irq_cib_enable,
+	.irq_set_type = octeon_irq_cib_set_type,
+};
+
+static int octeon_irq_cib_xlat(struct irq_domain *d,
+				   struct device_node *node,
+				   const u32 *intspec,
+				   unsigned int intsize,
+				   unsigned long *out_hwirq,
+				   unsigned int *out_type)
+{
+	unsigned int type = 0;
+
+	if (intsize == 2)
+		type = intspec[1];
+
+	switch (type) {
+	case 0: /* unofficial value, but we might as well let it work. */
+	case 4: /* official value for level triggering. */
+		*out_type = IRQ_TYPE_LEVEL_HIGH;
+		break;
+	case 1: /* official value for edge triggering. */
+		*out_type = IRQ_TYPE_EDGE_RISING;
+		break;
+	default: /* Nothing else is acceptable. */
+		return -EINVAL;
+	}
+
+	*out_hwirq = intspec[0];
+
+	return 0;
+}
+
+static int octeon_irq_cib_map(struct irq_domain *d,
+			      unsigned int virq, irq_hw_number_t hw)
+{
+	struct octeon_irq_cib_host_data *host_data = d->host_data;
+	struct octeon_irq_cib_chip_data *cd;
+
+	if (hw >= host_data->max_bits) {
+		pr_err("ERROR: %s mapping %u is to big!\n",
+		       d->of_node->name, (unsigned)hw);
+		return -EINVAL;
+	}
+
+	cd = kzalloc(sizeof(*cd), GFP_KERNEL);
+	cd->host_data = host_data;
+	cd->bit = hw;
+
+	irq_set_chip_and_handler(virq, &octeon_irq_chip_cib,
+				 handle_simple_irq);
+	irq_set_chip_data(virq, cd);
+	return 0;
+}
+
+static struct irq_domain_ops octeon_irq_domain_cib_ops = {
+	.map = octeon_irq_cib_map,
+	.unmap = octeon_irq_free_cd,
+	.xlate = octeon_irq_cib_xlat,
+};
+
+/* Chain to real handler. */
+static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data)
+{
+	u64 en;
+	u64 raw;
+	u64 bits;
+	int i;
+	int irq;
+	struct irq_domain *cib_domain = data;
+	struct octeon_irq_cib_host_data *host_data = cib_domain->host_data;
+
+	en = cvmx_read_csr(host_data->en_reg);
+	raw = cvmx_read_csr(host_data->raw_reg);
+
+	bits = en & raw;
+
+	for (i = 0; i < host_data->max_bits; i++) {
+		if ((bits & 1ull << i) == 0)
+			continue;
+		irq = irq_find_mapping(cib_domain, i);
+		if (!irq) {
+			unsigned long flags;
+
+			pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n",
+				i, host_data->raw_reg);
+			raw_spin_lock_irqsave(&host_data->lock, flags);
+			en = cvmx_read_csr(host_data->en_reg);
+			en &= ~(1ull << i);
+			cvmx_write_csr(host_data->en_reg, en);
+			cvmx_write_csr(host_data->raw_reg, 1ull << i);
+			raw_spin_unlock_irqrestore(&host_data->lock, flags);
+		} else {
+			struct irq_desc *desc = irq_to_desc(irq);
+			struct irq_data *irq_data = irq_desc_get_irq_data(desc);
+			/* If edge, acknowledge the bit we will be sending. */
+			if (irqd_get_trigger_type(irq_data) &
+				IRQ_TYPE_EDGE_BOTH)
+				cvmx_write_csr(host_data->raw_reg, 1ull << i);
+			generic_handle_irq_desc(irq, desc);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int __init octeon_irq_init_cib(struct device_node *ciu_node,
+				      struct device_node *parent)
+{
+	const __be32 *addr;
+	u32 val;
+	struct octeon_irq_cib_host_data *host_data;
+	int parent_irq;
+	int r;
+	struct irq_domain *cib_domain;
+
+	parent_irq = irq_of_parse_and_map(ciu_node, 0);
+	if (!parent_irq) {
+		pr_err("ERROR: Couldn't acquire parent_irq for %s\n.",
+			ciu_node->name);
+		return -EINVAL;
+	}
+
+	host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
+	raw_spin_lock_init(&host_data->lock);
+
+	addr = of_get_address(ciu_node, 0, NULL, NULL);
+	if (!addr) {
+		pr_err("ERROR: Couldn't acquire reg(0) %s\n.", ciu_node->name);
+		return -EINVAL;
+	}
+	host_data->raw_reg = (u64)phys_to_virt(
+		of_translate_address(ciu_node, addr));
+
+	addr = of_get_address(ciu_node, 1, NULL, NULL);
+	if (!addr) {
+		pr_err("ERROR: Couldn't acquire reg(1) %s\n.", ciu_node->name);
+		return -EINVAL;
+	}
+	host_data->en_reg = (u64)phys_to_virt(
+		of_translate_address(ciu_node, addr));
+
+	r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
+	if (r) {
+		pr_err("ERROR: Couldn't read cavium,max-bits from %s\n.",
+			ciu_node->name);
+		return r;
+	}
+	host_data->max_bits = val;
+
+	cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits,
+					   &octeon_irq_domain_cib_ops,
+					   host_data);
+	if (!cib_domain) {
+		pr_err("ERROR: Couldn't irq_domain_add_linear()\n.");
+		return -ENOMEM;
+	}
+
+	cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */
+	cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */
+
+	r = request_irq(parent_irq, octeon_irq_cib_handler,
+			IRQF_NO_THREAD, "cib", cib_domain);
+	if (r) {
+		pr_err("request_irq cib failed %d\n", r);
+		return r;
+	}
+	pr_info("CIB interrupt controller probed: %llx %d\n",
+		host_data->raw_reg, host_data->max_bits);
+	return 0;
+}
+
+static struct of_device_id ciu_types[] __initdata = {
+	{.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
+	{.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
+	{.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
+	{.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
+	{}
+};
+
+void __init arch_init_irq(void)
+{
+#ifdef CONFIG_SMP
+	/* Set the default affinity to the boot cpu. */
+	cpumask_clear(irq_default_affinity);
+	cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
+#endif
+	of_irq_init(ciu_types);
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned long cop0_cause;
+	unsigned long cop0_status;
+
+	while (1) {
+		cop0_cause = read_c0_cause();
+		cop0_status = read_c0_status();
+		cop0_cause &= cop0_status;
+		cop0_cause &= ST0_IM;
+
+		if (cop0_cause & STATUSF_IP2)
+			octeon_irq_ip2();
+		else if (cop0_cause & STATUSF_IP3)
+			octeon_irq_ip3();
+		else if (cop0_cause & STATUSF_IP4)
+			octeon_irq_ip4();
+		else if (cop0_cause)
+			do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
+		else
+			break;
+	}
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+void octeon_fixup_irqs(void)
+{
+	irq_cpu_offline();
+}
+
+#endif /* CONFIG_HOTPLUG_CPU */