Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / irqchip / irq-armada-370-xp.c
diff --git a/kernel/drivers/irqchip/irq-armada-370-xp.c b/kernel/drivers/irqchip/irq-armada-370-xp.c
new file mode 100644 (file)
index 0000000..daccc8b
--- /dev/null
@@ -0,0 +1,645 @@
+/*
+ * Marvell Armada 370 and Armada XP SoC IRQ handling
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Lior Amsalem <alior@marvell.com>
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ * Ben Dooks <ben.dooks@codethink.co.uk>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/cpu.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/irqdomain.h>
+#include <linux/slab.h>
+#include <linux/syscore_ops.h>
+#include <linux/msi.h>
+#include <asm/mach/arch.h>
+#include <asm/exception.h>
+#include <asm/smp_plat.h>
+#include <asm/mach/irq.h>
+
+#include "irqchip.h"
+
+/* Interrupt Controller Registers Map */
+#define ARMADA_370_XP_INT_SET_MASK_OFFS                (0x48)
+#define ARMADA_370_XP_INT_CLEAR_MASK_OFFS      (0x4C)
+#define ARMADA_370_XP_INT_FABRIC_MASK_OFFS     (0x54)
+#define ARMADA_370_XP_INT_CAUSE_PERF(cpu)      (1 << cpu)
+
+#define ARMADA_370_XP_INT_CONTROL              (0x00)
+#define ARMADA_370_XP_INT_SET_ENABLE_OFFS      (0x30)
+#define ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS    (0x34)
+#define ARMADA_370_XP_INT_SOURCE_CTL(irq)      (0x100 + irq*4)
+#define ARMADA_370_XP_INT_SOURCE_CPU_MASK      0xF
+#define ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid)  ((BIT(0) | BIT(8)) << cpuid)
+
+#define ARMADA_370_XP_CPU_INTACK_OFFS          (0x44)
+#define ARMADA_375_PPI_CAUSE                   (0x10)
+
+#define ARMADA_370_XP_SW_TRIG_INT_OFFS           (0x4)
+#define ARMADA_370_XP_IN_DRBEL_MSK_OFFS          (0xc)
+#define ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS        (0x8)
+
+#define ARMADA_370_XP_MAX_PER_CPU_IRQS         (28)
+
+#define ARMADA_370_XP_TIMER0_PER_CPU_IRQ       (5)
+#define ARMADA_370_XP_FABRIC_IRQ               (3)
+
+#define IPI_DOORBELL_START                      (0)
+#define IPI_DOORBELL_END                        (8)
+#define IPI_DOORBELL_MASK                       0xFF
+#define PCI_MSI_DOORBELL_START                  (16)
+#define PCI_MSI_DOORBELL_NR                     (16)
+#define PCI_MSI_DOORBELL_END                    (32)
+#define PCI_MSI_DOORBELL_MASK                   0xFFFF0000
+
+static void __iomem *per_cpu_int_base;
+static void __iomem *main_int_base;
+static struct irq_domain *armada_370_xp_mpic_domain;
+static u32 doorbell_mask_reg;
+static int parent_irq;
+#ifdef CONFIG_PCI_MSI
+static struct irq_domain *armada_370_xp_msi_domain;
+static DECLARE_BITMAP(msi_used, PCI_MSI_DOORBELL_NR);
+static DEFINE_MUTEX(msi_used_lock);
+static phys_addr_t msi_doorbell_addr;
+#endif
+
+static inline bool is_percpu_irq(irq_hw_number_t irq)
+{
+       switch (irq) {
+       case ARMADA_370_XP_TIMER0_PER_CPU_IRQ:
+       case ARMADA_370_XP_FABRIC_IRQ:
+               return true;
+       default:
+               return false;
+       }
+}
+
+/*
+ * In SMP mode:
+ * For shared global interrupts, mask/unmask global enable bit
+ * For CPU interrupts, mask/unmask the calling CPU's bit
+ */
+static void armada_370_xp_irq_mask(struct irq_data *d)
+{
+       irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+       if (!is_percpu_irq(hwirq))
+               writel(hwirq, main_int_base +
+                               ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS);
+       else
+               writel(hwirq, per_cpu_int_base +
+                               ARMADA_370_XP_INT_SET_MASK_OFFS);
+}
+
+static void armada_370_xp_irq_unmask(struct irq_data *d)
+{
+       irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+       if (!is_percpu_irq(hwirq))
+               writel(hwirq, main_int_base +
+                               ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+       else
+               writel(hwirq, per_cpu_int_base +
+                               ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+}
+
+#ifdef CONFIG_PCI_MSI
+
+static int armada_370_xp_alloc_msi(void)
+{
+       int hwirq;
+
+       mutex_lock(&msi_used_lock);
+       hwirq = find_first_zero_bit(&msi_used, PCI_MSI_DOORBELL_NR);
+       if (hwirq >= PCI_MSI_DOORBELL_NR)
+               hwirq = -ENOSPC;
+       else
+               set_bit(hwirq, msi_used);
+       mutex_unlock(&msi_used_lock);
+
+       return hwirq;
+}
+
+static void armada_370_xp_free_msi(int hwirq)
+{
+       mutex_lock(&msi_used_lock);
+       if (!test_bit(hwirq, msi_used))
+               pr_err("trying to free unused MSI#%d\n", hwirq);
+       else
+               clear_bit(hwirq, msi_used);
+       mutex_unlock(&msi_used_lock);
+}
+
+static int armada_370_xp_setup_msi_irq(struct msi_controller *chip,
+                                      struct pci_dev *pdev,
+                                      struct msi_desc *desc)
+{
+       struct msi_msg msg;
+       int virq, hwirq;
+
+       /* We support MSI, but not MSI-X */
+       if (desc->msi_attrib.is_msix)
+               return -EINVAL;
+
+       hwirq = armada_370_xp_alloc_msi();
+       if (hwirq < 0)
+               return hwirq;
+
+       virq = irq_create_mapping(armada_370_xp_msi_domain, hwirq);
+       if (!virq) {
+               armada_370_xp_free_msi(hwirq);
+               return -EINVAL;
+       }
+
+       irq_set_msi_desc(virq, desc);
+
+       msg.address_lo = msi_doorbell_addr;
+       msg.address_hi = 0;
+       msg.data = 0xf00 | (hwirq + 16);
+
+       pci_write_msi_msg(virq, &msg);
+       return 0;
+}
+
+static void armada_370_xp_teardown_msi_irq(struct msi_controller *chip,
+                                          unsigned int irq)
+{
+       struct irq_data *d = irq_get_irq_data(irq);
+       unsigned long hwirq = d->hwirq;
+
+       irq_dispose_mapping(irq);
+       armada_370_xp_free_msi(hwirq);
+}
+
+static struct irq_chip armada_370_xp_msi_irq_chip = {
+       .name = "armada_370_xp_msi_irq",
+       .irq_enable = pci_msi_unmask_irq,
+       .irq_disable = pci_msi_mask_irq,
+       .irq_mask = pci_msi_mask_irq,
+       .irq_unmask = pci_msi_unmask_irq,
+};
+
+static int armada_370_xp_msi_map(struct irq_domain *domain, unsigned int virq,
+                                irq_hw_number_t hw)
+{
+       irq_set_chip_and_handler(virq, &armada_370_xp_msi_irq_chip,
+                                handle_simple_irq);
+       set_irq_flags(virq, IRQF_VALID);
+
+       return 0;
+}
+
+static const struct irq_domain_ops armada_370_xp_msi_irq_ops = {
+       .map = armada_370_xp_msi_map,
+};
+
+static int armada_370_xp_msi_init(struct device_node *node,
+                                 phys_addr_t main_int_phys_base)
+{
+       struct msi_controller *msi_chip;
+       u32 reg;
+       int ret;
+
+       msi_doorbell_addr = main_int_phys_base +
+               ARMADA_370_XP_SW_TRIG_INT_OFFS;
+
+       msi_chip = kzalloc(sizeof(*msi_chip), GFP_KERNEL);
+       if (!msi_chip)
+               return -ENOMEM;
+
+       msi_chip->setup_irq = armada_370_xp_setup_msi_irq;
+       msi_chip->teardown_irq = armada_370_xp_teardown_msi_irq;
+       msi_chip->of_node = node;
+
+       armada_370_xp_msi_domain =
+               irq_domain_add_linear(NULL, PCI_MSI_DOORBELL_NR,
+                                     &armada_370_xp_msi_irq_ops,
+                                     NULL);
+       if (!armada_370_xp_msi_domain) {
+               kfree(msi_chip);
+               return -ENOMEM;
+       }
+
+       ret = of_pci_msi_chip_add(msi_chip);
+       if (ret < 0) {
+               irq_domain_remove(armada_370_xp_msi_domain);
+               kfree(msi_chip);
+               return ret;
+       }
+
+       reg = readl(per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS)
+               | PCI_MSI_DOORBELL_MASK;
+
+       writel(reg, per_cpu_int_base +
+              ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+
+       /* Unmask IPI interrupt */
+       writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+
+       return 0;
+}
+#else
+static inline int armada_370_xp_msi_init(struct device_node *node,
+                                        phys_addr_t main_int_phys_base)
+{
+       return 0;
+}
+#endif
+
+#ifdef CONFIG_SMP
+static DEFINE_RAW_SPINLOCK(irq_controller_lock);
+
+static int armada_xp_set_affinity(struct irq_data *d,
+                                 const struct cpumask *mask_val, bool force)
+{
+       irq_hw_number_t hwirq = irqd_to_hwirq(d);
+       unsigned long reg, mask;
+       int cpu;
+
+       /* Select a single core from the affinity mask which is online */
+       cpu = cpumask_any_and(mask_val, cpu_online_mask);
+       mask = 1UL << cpu_logical_map(cpu);
+
+       raw_spin_lock(&irq_controller_lock);
+       reg = readl(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
+       reg = (reg & (~ARMADA_370_XP_INT_SOURCE_CPU_MASK)) | mask;
+       writel(reg, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
+       raw_spin_unlock(&irq_controller_lock);
+
+       return IRQ_SET_MASK_OK;
+}
+#endif
+
+static struct irq_chip armada_370_xp_irq_chip = {
+       .name           = "armada_370_xp_irq",
+       .irq_mask       = armada_370_xp_irq_mask,
+       .irq_mask_ack   = armada_370_xp_irq_mask,
+       .irq_unmask     = armada_370_xp_irq_unmask,
+#ifdef CONFIG_SMP
+       .irq_set_affinity = armada_xp_set_affinity,
+#endif
+       .flags          = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
+};
+
+static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
+                                     unsigned int virq, irq_hw_number_t hw)
+{
+       armada_370_xp_irq_mask(irq_get_irq_data(virq));
+       if (!is_percpu_irq(hw))
+               writel(hw, per_cpu_int_base +
+                       ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+       else
+               writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+       irq_set_status_flags(virq, IRQ_LEVEL);
+
+       if (is_percpu_irq(hw)) {
+               irq_set_percpu_devid(virq);
+               irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip,
+                                       handle_percpu_devid_irq);
+
+       } else {
+               irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip,
+                                       handle_level_irq);
+       }
+       set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
+
+       return 0;
+}
+
+static void armada_xp_mpic_smp_cpu_init(void)
+{
+       u32 control;
+       int nr_irqs, i;
+
+       control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
+       nr_irqs = (control >> 2) & 0x3ff;
+
+       for (i = 0; i < nr_irqs; i++)
+               writel(i, per_cpu_int_base + ARMADA_370_XP_INT_SET_MASK_OFFS);
+
+       /* Clear pending IPIs */
+       writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+
+       /* Enable first 8 IPIs */
+       writel(IPI_DOORBELL_MASK, per_cpu_int_base +
+               ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+
+       /* Unmask IPI interrupt */
+       writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+}
+
+static void armada_xp_mpic_perf_init(void)
+{
+       unsigned long cpuid = cpu_logical_map(smp_processor_id());
+
+       /* Enable Performance Counter Overflow interrupts */
+       writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid),
+              per_cpu_int_base + ARMADA_370_XP_INT_FABRIC_MASK_OFFS);
+}
+
+#ifdef CONFIG_SMP
+static void armada_mpic_send_doorbell(const struct cpumask *mask,
+                                     unsigned int irq)
+{
+       int cpu;
+       unsigned long map = 0;
+
+       /* Convert our logical CPU mask into a physical one. */
+       for_each_cpu(cpu, mask)
+               map |= 1 << cpu_logical_map(cpu);
+
+       /*
+        * Ensure that stores to Normal memory are visible to the
+        * other CPUs before issuing the IPI.
+        */
+       dsb();
+
+       /* submit softirq */
+       writel((map << 8) | irq, main_int_base +
+               ARMADA_370_XP_SW_TRIG_INT_OFFS);
+}
+
+static int armada_xp_mpic_secondary_init(struct notifier_block *nfb,
+                                        unsigned long action, void *hcpu)
+{
+       if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
+               armada_xp_mpic_perf_init();
+               armada_xp_mpic_smp_cpu_init();
+       }
+
+       return NOTIFY_OK;
+}
+
+static struct notifier_block armada_370_xp_mpic_cpu_notifier = {
+       .notifier_call = armada_xp_mpic_secondary_init,
+       .priority = 100,
+};
+
+static int mpic_cascaded_secondary_init(struct notifier_block *nfb,
+                                       unsigned long action, void *hcpu)
+{
+       if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
+               armada_xp_mpic_perf_init();
+               enable_percpu_irq(parent_irq, IRQ_TYPE_NONE);
+       }
+
+       return NOTIFY_OK;
+}
+
+static struct notifier_block mpic_cascaded_cpu_notifier = {
+       .notifier_call = mpic_cascaded_secondary_init,
+       .priority = 100,
+};
+#endif /* CONFIG_SMP */
+
+static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
+       .map = armada_370_xp_mpic_irq_map,
+       .xlate = irq_domain_xlate_onecell,
+};
+
+#ifdef CONFIG_PCI_MSI
+static void armada_370_xp_handle_msi_irq(struct pt_regs *regs, bool is_chained)
+{
+       u32 msimask, msinr;
+
+       msimask = readl_relaxed(per_cpu_int_base +
+                               ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
+               & PCI_MSI_DOORBELL_MASK;
+
+       writel(~msimask, per_cpu_int_base +
+              ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+
+       for (msinr = PCI_MSI_DOORBELL_START;
+            msinr < PCI_MSI_DOORBELL_END; msinr++) {
+               int irq;
+
+               if (!(msimask & BIT(msinr)))
+                       continue;
+
+               if (is_chained) {
+                       irq = irq_find_mapping(armada_370_xp_msi_domain,
+                                              msinr - 16);
+                       generic_handle_irq(irq);
+               } else {
+                       irq = msinr - 16;
+                       handle_domain_irq(armada_370_xp_msi_domain,
+                                         irq, regs);
+               }
+       }
+}
+#else
+static void armada_370_xp_handle_msi_irq(struct pt_regs *r, bool b) {}
+#endif
+
+static void armada_370_xp_mpic_handle_cascade_irq(unsigned int irq,
+                                                 struct irq_desc *desc)
+{
+       struct irq_chip *chip = irq_get_chip(irq);
+       unsigned long irqmap, irqn, irqsrc, cpuid;
+       unsigned int cascade_irq;
+
+       chained_irq_enter(chip, desc);
+
+       irqmap = readl_relaxed(per_cpu_int_base + ARMADA_375_PPI_CAUSE);
+       cpuid = cpu_logical_map(smp_processor_id());
+
+       for_each_set_bit(irqn, &irqmap, BITS_PER_LONG) {
+               irqsrc = readl_relaxed(main_int_base +
+                                      ARMADA_370_XP_INT_SOURCE_CTL(irqn));
+
+               /* Check if the interrupt is not masked on current CPU.
+                * Test IRQ (0-1) and FIQ (8-9) mask bits.
+                */
+               if (!(irqsrc & ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid)))
+                       continue;
+
+               if (irqn == 1) {
+                       armada_370_xp_handle_msi_irq(NULL, true);
+                       continue;
+               }
+
+               cascade_irq = irq_find_mapping(armada_370_xp_mpic_domain, irqn);
+               generic_handle_irq(cascade_irq);
+       }
+
+       chained_irq_exit(chip, desc);
+}
+
+static void __exception_irq_entry
+armada_370_xp_handle_irq(struct pt_regs *regs)
+{
+       u32 irqstat, irqnr;
+
+       do {
+               irqstat = readl_relaxed(per_cpu_int_base +
+                                       ARMADA_370_XP_CPU_INTACK_OFFS);
+               irqnr = irqstat & 0x3FF;
+
+               if (irqnr > 1022)
+                       break;
+
+               if (irqnr > 1) {
+                       handle_domain_irq(armada_370_xp_mpic_domain,
+                                         irqnr, regs);
+                       continue;
+               }
+
+               /* MSI handling */
+               if (irqnr == 1)
+                       armada_370_xp_handle_msi_irq(regs, false);
+
+#ifdef CONFIG_SMP
+               /* IPI Handling */
+               if (irqnr == 0) {
+                       u32 ipimask, ipinr;
+
+                       ipimask = readl_relaxed(per_cpu_int_base +
+                                               ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
+                               & IPI_DOORBELL_MASK;
+
+                       writel(~ipimask, per_cpu_int_base +
+                               ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
+
+                       /* Handle all pending doorbells */
+                       for (ipinr = IPI_DOORBELL_START;
+                            ipinr < IPI_DOORBELL_END; ipinr++) {
+                               if (ipimask & (0x1 << ipinr))
+                                       handle_IPI(ipinr, regs);
+                       }
+                       continue;
+               }
+#endif
+
+       } while (1);
+}
+
+static int armada_370_xp_mpic_suspend(void)
+{
+       doorbell_mask_reg = readl(per_cpu_int_base +
+                                 ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+       return 0;
+}
+
+static void armada_370_xp_mpic_resume(void)
+{
+       int nirqs;
+       irq_hw_number_t irq;
+
+       /* Re-enable interrupts */
+       nirqs = (readl(main_int_base + ARMADA_370_XP_INT_CONTROL) >> 2) & 0x3ff;
+       for (irq = 0; irq < nirqs; irq++) {
+               struct irq_data *data;
+               int virq;
+
+               virq = irq_linear_revmap(armada_370_xp_mpic_domain, irq);
+               if (virq == 0)
+                       continue;
+
+               if (irq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ)
+                       writel(irq, per_cpu_int_base +
+                              ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+               else
+                       writel(irq, main_int_base +
+                              ARMADA_370_XP_INT_SET_ENABLE_OFFS);
+
+               data = irq_get_irq_data(virq);
+               if (!irqd_irq_disabled(data))
+                       armada_370_xp_irq_unmask(data);
+       }
+
+       /* Reconfigure doorbells for IPIs and MSIs */
+       writel(doorbell_mask_reg,
+              per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS);
+       if (doorbell_mask_reg & IPI_DOORBELL_MASK)
+               writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+       if (doorbell_mask_reg & PCI_MSI_DOORBELL_MASK)
+               writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
+}
+
+struct syscore_ops armada_370_xp_mpic_syscore_ops = {
+       .suspend        = armada_370_xp_mpic_suspend,
+       .resume         = armada_370_xp_mpic_resume,
+};
+
+static int __init armada_370_xp_mpic_of_init(struct device_node *node,
+                                            struct device_node *parent)
+{
+       struct resource main_int_res, per_cpu_int_res;
+       int nr_irqs, i;
+       u32 control;
+
+       BUG_ON(of_address_to_resource(node, 0, &main_int_res));
+       BUG_ON(of_address_to_resource(node, 1, &per_cpu_int_res));
+
+       BUG_ON(!request_mem_region(main_int_res.start,
+                                  resource_size(&main_int_res),
+                                  node->full_name));
+       BUG_ON(!request_mem_region(per_cpu_int_res.start,
+                                  resource_size(&per_cpu_int_res),
+                                  node->full_name));
+
+       main_int_base = ioremap(main_int_res.start,
+                               resource_size(&main_int_res));
+       BUG_ON(!main_int_base);
+
+       per_cpu_int_base = ioremap(per_cpu_int_res.start,
+                                  resource_size(&per_cpu_int_res));
+       BUG_ON(!per_cpu_int_base);
+
+       control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL);
+       nr_irqs = (control >> 2) & 0x3ff;
+
+       for (i = 0; i < nr_irqs; i++)
+               writel(i, main_int_base + ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS);
+
+       armada_370_xp_mpic_domain =
+               irq_domain_add_linear(node, nr_irqs,
+                               &armada_370_xp_mpic_irq_ops, NULL);
+
+       BUG_ON(!armada_370_xp_mpic_domain);
+
+       /* Setup for the boot CPU */
+       armada_xp_mpic_perf_init();
+       armada_xp_mpic_smp_cpu_init();
+
+       armada_370_xp_msi_init(node, main_int_res.start);
+
+       parent_irq = irq_of_parse_and_map(node, 0);
+       if (parent_irq <= 0) {
+               irq_set_default_host(armada_370_xp_mpic_domain);
+               set_handle_irq(armada_370_xp_handle_irq);
+#ifdef CONFIG_SMP
+               set_smp_cross_call(armada_mpic_send_doorbell);
+               register_cpu_notifier(&armada_370_xp_mpic_cpu_notifier);
+#endif
+       } else {
+#ifdef CONFIG_SMP
+               register_cpu_notifier(&mpic_cascaded_cpu_notifier);
+#endif
+               irq_set_chained_handler(parent_irq,
+                                       armada_370_xp_mpic_handle_cascade_irq);
+       }
+
+       register_syscore_ops(&armada_370_xp_mpic_syscore_ops);
+
+       return 0;
+}
+
+IRQCHIP_DECLARE(armada_370_xp_mpic, "marvell,mpic", armada_370_xp_mpic_of_init);