[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/irqchip/irq-mips-gic.c b/src/kernel/linux/v4.14/drivers/irqchip/irq-mips-gic.c
new file mode 100644
index 0000000..a9f300e
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/irqchip/irq-mips-gic.c
@@ -0,0 +1,785 @@
+/*
+ * 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) 2008 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ */
+#include <linux/bitmap.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+
+#include <asm/mips-cps.h>
+#include <asm/setup.h>
+#include <asm/traps.h>
+
+#include <dt-bindings/interrupt-controller/mips-gic.h>
+
+#define GIC_MAX_INTRS 256
+#define GIC_MAX_LONGS BITS_TO_LONGS(GIC_MAX_INTRS)
+
+/* Add 2 to convert GIC CPU pin to core interrupt */
+#define GIC_CPU_PIN_OFFSET 2
+
+/* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */
+#define GIC_PIN_TO_VEC_OFFSET 1
+
+/* Convert between local/shared IRQ number and GIC HW IRQ number. */
+#define GIC_LOCAL_HWIRQ_BASE 0
+#define GIC_LOCAL_TO_HWIRQ(x) (GIC_LOCAL_HWIRQ_BASE + (x))
+#define GIC_HWIRQ_TO_LOCAL(x) ((x) - GIC_LOCAL_HWIRQ_BASE)
+#define GIC_SHARED_HWIRQ_BASE GIC_NUM_LOCAL_INTRS
+#define GIC_SHARED_TO_HWIRQ(x) (GIC_SHARED_HWIRQ_BASE + (x))
+#define GIC_HWIRQ_TO_SHARED(x) ((x) - GIC_SHARED_HWIRQ_BASE)
+
+void __iomem *mips_gic_base;
+
+DEFINE_PER_CPU_READ_MOSTLY(unsigned long[GIC_MAX_LONGS], pcpu_masks);
+
+static DEFINE_SPINLOCK(gic_lock);
+static struct irq_domain *gic_irq_domain;
+static struct irq_domain *gic_ipi_domain;
+static int gic_shared_intrs;
+static int gic_vpes;
+static unsigned int gic_cpu_pin;
+static unsigned int timer_cpu_pin;
+static struct irq_chip gic_level_irq_controller, gic_edge_irq_controller;
+DECLARE_BITMAP(ipi_resrv, GIC_MAX_INTRS);
+DECLARE_BITMAP(ipi_available, GIC_MAX_INTRS);
+
+static void gic_clear_pcpu_masks(unsigned int intr)
+{
+ unsigned int i;
+
+ /* Clear the interrupt's bit in all pcpu_masks */
+ for_each_possible_cpu(i)
+ clear_bit(intr, per_cpu_ptr(pcpu_masks, i));
+}
+
+static bool gic_local_irq_is_routable(int intr)
+{
+ u32 vpe_ctl;
+
+ /* All local interrupts are routable in EIC mode. */
+ if (cpu_has_veic)
+ return true;
+
+ vpe_ctl = read_gic_vl_ctl();
+ switch (intr) {
+ case GIC_LOCAL_INT_TIMER:
+ return vpe_ctl & GIC_VX_CTL_TIMER_ROUTABLE;
+ case GIC_LOCAL_INT_PERFCTR:
+ return vpe_ctl & GIC_VX_CTL_PERFCNT_ROUTABLE;
+ case GIC_LOCAL_INT_FDC:
+ return vpe_ctl & GIC_VX_CTL_FDC_ROUTABLE;
+ case GIC_LOCAL_INT_SWINT0:
+ case GIC_LOCAL_INT_SWINT1:
+ return vpe_ctl & GIC_VX_CTL_SWINT_ROUTABLE;
+ default:
+ return true;
+ }
+}
+
+static void gic_bind_eic_interrupt(int irq, int set)
+{
+ /* Convert irq vector # to hw int # */
+ irq -= GIC_PIN_TO_VEC_OFFSET;
+
+ /* Set irq to use shadow set */
+ write_gic_vl_eic_shadow_set(irq, set);
+}
+
+static void gic_send_ipi(struct irq_data *d, unsigned int cpu)
+{
+ irq_hw_number_t hwirq = GIC_HWIRQ_TO_SHARED(irqd_to_hwirq(d));
+
+ write_gic_wedge(GIC_WEDGE_RW | hwirq);
+}
+
+int gic_get_c0_compare_int(void)
+{
+ if (!gic_local_irq_is_routable(GIC_LOCAL_INT_TIMER))
+ return MIPS_CPU_IRQ_BASE + cp0_compare_irq;
+ return irq_create_mapping(gic_irq_domain,
+ GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_TIMER));
+}
+
+int gic_get_c0_perfcount_int(void)
+{
+ if (!gic_local_irq_is_routable(GIC_LOCAL_INT_PERFCTR)) {
+ /* Is the performance counter shared with the timer? */
+ if (cp0_perfcount_irq < 0)
+ return -1;
+ return MIPS_CPU_IRQ_BASE + cp0_perfcount_irq;
+ }
+ return irq_create_mapping(gic_irq_domain,
+ GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_PERFCTR));
+}
+
+int gic_get_c0_fdc_int(void)
+{
+ if (!gic_local_irq_is_routable(GIC_LOCAL_INT_FDC)) {
+ /* Is the FDC IRQ even present? */
+ if (cp0_fdc_irq < 0)
+ return -1;
+ return MIPS_CPU_IRQ_BASE + cp0_fdc_irq;
+ }
+
+ return irq_create_mapping(gic_irq_domain,
+ GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_FDC));
+}
+
+static void gic_handle_shared_int(bool chained)
+{
+ unsigned int intr, virq;
+ unsigned long *pcpu_mask;
+ DECLARE_BITMAP(pending, GIC_MAX_INTRS);
+
+ /* Get per-cpu bitmaps */
+ pcpu_mask = this_cpu_ptr(pcpu_masks);
+
+ if (mips_cm_is64)
+ __ioread64_copy(pending, addr_gic_pend(),
+ DIV_ROUND_UP(gic_shared_intrs, 64));
+ else
+ __ioread32_copy(pending, addr_gic_pend(),
+ DIV_ROUND_UP(gic_shared_intrs, 32));
+
+ bitmap_and(pending, pending, pcpu_mask, gic_shared_intrs);
+
+ for_each_set_bit(intr, pending, gic_shared_intrs) {
+ virq = irq_linear_revmap(gic_irq_domain,
+ GIC_SHARED_TO_HWIRQ(intr));
+ if (chained)
+ generic_handle_irq(virq);
+ else
+ do_IRQ(virq);
+ }
+}
+
+static void gic_mask_irq(struct irq_data *d)
+{
+ unsigned int intr = GIC_HWIRQ_TO_SHARED(d->hwirq);
+
+ write_gic_rmask(intr);
+ gic_clear_pcpu_masks(intr);
+}
+
+static void gic_unmask_irq(struct irq_data *d)
+{
+ unsigned int intr = GIC_HWIRQ_TO_SHARED(d->hwirq);
+ unsigned int cpu;
+
+ write_gic_smask(intr);
+
+ gic_clear_pcpu_masks(intr);
+ cpu = cpumask_first(irq_data_get_effective_affinity_mask(d));
+ set_bit(intr, per_cpu_ptr(pcpu_masks, cpu));
+}
+
+static void gic_ack_irq(struct irq_data *d)
+{
+ unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq);
+
+ write_gic_wedge(irq);
+}
+
+static int gic_set_type(struct irq_data *d, unsigned int type)
+{
+ unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq);
+ unsigned long flags;
+ bool is_edge;
+
+ spin_lock_irqsave(&gic_lock, flags);
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQ_TYPE_EDGE_FALLING:
+ change_gic_pol(irq, GIC_POL_FALLING_EDGE);
+ change_gic_trig(irq, GIC_TRIG_EDGE);
+ change_gic_dual(irq, GIC_DUAL_SINGLE);
+ is_edge = true;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ change_gic_pol(irq, GIC_POL_RISING_EDGE);
+ change_gic_trig(irq, GIC_TRIG_EDGE);
+ change_gic_dual(irq, GIC_DUAL_SINGLE);
+ is_edge = true;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ /* polarity is irrelevant in this case */
+ change_gic_trig(irq, GIC_TRIG_EDGE);
+ change_gic_dual(irq, GIC_DUAL_DUAL);
+ is_edge = true;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ change_gic_pol(irq, GIC_POL_ACTIVE_LOW);
+ change_gic_trig(irq, GIC_TRIG_LEVEL);
+ change_gic_dual(irq, GIC_DUAL_SINGLE);
+ is_edge = false;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ default:
+ change_gic_pol(irq, GIC_POL_ACTIVE_HIGH);
+ change_gic_trig(irq, GIC_TRIG_LEVEL);
+ change_gic_dual(irq, GIC_DUAL_SINGLE);
+ is_edge = false;
+ break;
+ }
+
+ if (is_edge)
+ irq_set_chip_handler_name_locked(d, &gic_edge_irq_controller,
+ handle_edge_irq, NULL);
+ else
+ irq_set_chip_handler_name_locked(d, &gic_level_irq_controller,
+ handle_level_irq, NULL);
+ spin_unlock_irqrestore(&gic_lock, flags);
+
+ return 0;
+}
+
+#ifdef CONFIG_SMP
+static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
+ bool force)
+{
+ unsigned int irq = GIC_HWIRQ_TO_SHARED(d->hwirq);
+ unsigned long flags;
+ unsigned int cpu;
+
+ cpu = cpumask_first_and(cpumask, cpu_online_mask);
+ if (cpu >= NR_CPUS)
+ return -EINVAL;
+
+ /* Assumption : cpumask refers to a single CPU */
+ spin_lock_irqsave(&gic_lock, flags);
+
+ /* Re-route this IRQ */
+ write_gic_map_vp(irq, BIT(mips_cm_vp_id(cpu)));
+
+ /* Update the pcpu_masks */
+ gic_clear_pcpu_masks(irq);
+ if (read_gic_mask(irq))
+ set_bit(irq, per_cpu_ptr(pcpu_masks, cpu));
+
+ irq_data_update_effective_affinity(d, cpumask_of(cpu));
+ spin_unlock_irqrestore(&gic_lock, flags);
+
+ return IRQ_SET_MASK_OK;
+}
+#endif
+
+static struct irq_chip gic_level_irq_controller = {
+ .name = "MIPS GIC",
+ .irq_mask = gic_mask_irq,
+ .irq_unmask = gic_unmask_irq,
+ .irq_set_type = gic_set_type,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = gic_set_affinity,
+#endif
+};
+
+static struct irq_chip gic_edge_irq_controller = {
+ .name = "MIPS GIC",
+ .irq_ack = gic_ack_irq,
+ .irq_mask = gic_mask_irq,
+ .irq_unmask = gic_unmask_irq,
+ .irq_set_type = gic_set_type,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = gic_set_affinity,
+#endif
+ .ipi_send_single = gic_send_ipi,
+};
+
+static void gic_handle_local_int(bool chained)
+{
+ unsigned long pending, masked;
+ unsigned int intr, virq;
+
+ pending = read_gic_vl_pend();
+ masked = read_gic_vl_mask();
+
+ bitmap_and(&pending, &pending, &masked, GIC_NUM_LOCAL_INTRS);
+
+ for_each_set_bit(intr, &pending, GIC_NUM_LOCAL_INTRS) {
+ virq = irq_linear_revmap(gic_irq_domain,
+ GIC_LOCAL_TO_HWIRQ(intr));
+ if (chained)
+ generic_handle_irq(virq);
+ else
+ do_IRQ(virq);
+ }
+}
+
+static void gic_mask_local_irq(struct irq_data *d)
+{
+ int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
+
+ write_gic_vl_rmask(BIT(intr));
+}
+
+static void gic_unmask_local_irq(struct irq_data *d)
+{
+ int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
+
+ write_gic_vl_smask(BIT(intr));
+}
+
+static struct irq_chip gic_local_irq_controller = {
+ .name = "MIPS GIC Local",
+ .irq_mask = gic_mask_local_irq,
+ .irq_unmask = gic_unmask_local_irq,
+};
+
+static void gic_mask_local_irq_all_vpes(struct irq_data *d)
+{
+ int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gic_lock, flags);
+ for (i = 0; i < gic_vpes; i++) {
+ write_gic_vl_other(mips_cm_vp_id(i));
+ write_gic_vo_rmask(BIT(intr));
+ }
+ spin_unlock_irqrestore(&gic_lock, flags);
+}
+
+static void gic_unmask_local_irq_all_vpes(struct irq_data *d)
+{
+ int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gic_lock, flags);
+ for (i = 0; i < gic_vpes; i++) {
+ write_gic_vl_other(mips_cm_vp_id(i));
+ write_gic_vo_smask(BIT(intr));
+ }
+ spin_unlock_irqrestore(&gic_lock, flags);
+}
+
+static struct irq_chip gic_all_vpes_local_irq_controller = {
+ .name = "MIPS GIC Local",
+ .irq_mask = gic_mask_local_irq_all_vpes,
+ .irq_unmask = gic_unmask_local_irq_all_vpes,
+};
+
+static void __gic_irq_dispatch(void)
+{
+ gic_handle_local_int(false);
+ gic_handle_shared_int(false);
+}
+
+static void gic_irq_dispatch(struct irq_desc *desc)
+{
+ gic_handle_local_int(true);
+ gic_handle_shared_int(true);
+}
+
+static int gic_local_irq_domain_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ int intr = GIC_HWIRQ_TO_LOCAL(hw);
+ int i;
+ unsigned long flags;
+ u32 val;
+
+ if (!gic_local_irq_is_routable(intr))
+ return -EPERM;
+
+ if (intr > GIC_LOCAL_INT_FDC) {
+ pr_err("Invalid local IRQ %d\n", intr);
+ return -EINVAL;
+ }
+
+ if (intr == GIC_LOCAL_INT_TIMER) {
+ /* CONFIG_MIPS_CMP workaround (see __gic_init) */
+ val = GIC_MAP_PIN_MAP_TO_PIN | timer_cpu_pin;
+ } else {
+ val = GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin;
+ }
+
+ spin_lock_irqsave(&gic_lock, flags);
+ for (i = 0; i < gic_vpes; i++) {
+ write_gic_vl_other(mips_cm_vp_id(i));
+ write_gic_vo_map(intr, val);
+ }
+ spin_unlock_irqrestore(&gic_lock, flags);
+
+ return 0;
+}
+
+static int gic_shared_irq_domain_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw, unsigned int cpu)
+{
+ int intr = GIC_HWIRQ_TO_SHARED(hw);
+ struct irq_data *data;
+ unsigned long flags;
+
+ data = irq_get_irq_data(virq);
+
+ spin_lock_irqsave(&gic_lock, flags);
+ write_gic_map_pin(intr, GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin);
+ write_gic_map_vp(intr, BIT(mips_cm_vp_id(cpu)));
+ irq_data_update_effective_affinity(data, cpumask_of(cpu));
+ spin_unlock_irqrestore(&gic_lock, flags);
+
+ return 0;
+}
+
+static int gic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq,
+ unsigned int *out_type)
+{
+ if (intsize != 3)
+ return -EINVAL;
+
+ if (intspec[0] == GIC_SHARED)
+ *out_hwirq = GIC_SHARED_TO_HWIRQ(intspec[1]);
+ else if (intspec[0] == GIC_LOCAL)
+ *out_hwirq = GIC_LOCAL_TO_HWIRQ(intspec[1]);
+ else
+ return -EINVAL;
+ *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK;
+
+ return 0;
+}
+
+static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ int err;
+
+ if (hwirq >= GIC_SHARED_HWIRQ_BASE) {
+ /* verify that shared irqs don't conflict with an IPI irq */
+ if (test_bit(GIC_HWIRQ_TO_SHARED(hwirq), ipi_resrv))
+ return -EBUSY;
+
+ err = irq_domain_set_hwirq_and_chip(d, virq, hwirq,
+ &gic_level_irq_controller,
+ NULL);
+ if (err)
+ return err;
+
+ irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq)));
+ return gic_shared_irq_domain_map(d, virq, hwirq, 0);
+ }
+
+ switch (GIC_HWIRQ_TO_LOCAL(hwirq)) {
+ case GIC_LOCAL_INT_TIMER:
+ case GIC_LOCAL_INT_PERFCTR:
+ case GIC_LOCAL_INT_FDC:
+ /*
+ * HACK: These are all really percpu interrupts, but
+ * the rest of the MIPS kernel code does not use the
+ * percpu IRQ API for them.
+ */
+ err = irq_domain_set_hwirq_and_chip(d, virq, hwirq,
+ &gic_all_vpes_local_irq_controller,
+ NULL);
+ if (err)
+ return err;
+
+ irq_set_handler(virq, handle_percpu_irq);
+ break;
+
+ default:
+ err = irq_domain_set_hwirq_and_chip(d, virq, hwirq,
+ &gic_local_irq_controller,
+ NULL);
+ if (err)
+ return err;
+
+ irq_set_handler(virq, handle_percpu_devid_irq);
+ irq_set_percpu_devid(virq);
+ break;
+ }
+
+ return gic_local_irq_domain_map(d, virq, hwirq);
+}
+
+static int gic_irq_domain_alloc(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ struct irq_fwspec *fwspec = arg;
+ irq_hw_number_t hwirq;
+
+ if (fwspec->param[0] == GIC_SHARED)
+ hwirq = GIC_SHARED_TO_HWIRQ(fwspec->param[1]);
+ else
+ hwirq = GIC_LOCAL_TO_HWIRQ(fwspec->param[1]);
+
+ return gic_irq_domain_map(d, virq, hwirq);
+}
+
+void gic_irq_domain_free(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs)
+{
+}
+
+static const struct irq_domain_ops gic_irq_domain_ops = {
+ .xlate = gic_irq_domain_xlate,
+ .alloc = gic_irq_domain_alloc,
+ .free = gic_irq_domain_free,
+ .map = gic_irq_domain_map,
+};
+
+static int gic_ipi_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq,
+ unsigned int *out_type)
+{
+ /*
+ * There's nothing to translate here. hwirq is dynamically allocated and
+ * the irq type is always edge triggered.
+ * */
+ *out_hwirq = 0;
+ *out_type = IRQ_TYPE_EDGE_RISING;
+
+ return 0;
+}
+
+static int gic_ipi_domain_alloc(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ struct cpumask *ipimask = arg;
+ irq_hw_number_t hwirq, base_hwirq;
+ int cpu, ret, i;
+
+ base_hwirq = find_first_bit(ipi_available, gic_shared_intrs);
+ if (base_hwirq == gic_shared_intrs)
+ return -ENOMEM;
+
+ /* check that we have enough space */
+ for (i = base_hwirq; i < nr_irqs; i++) {
+ if (!test_bit(i, ipi_available))
+ return -EBUSY;
+ }
+ bitmap_clear(ipi_available, base_hwirq, nr_irqs);
+
+ /* map the hwirq for each cpu consecutively */
+ i = 0;
+ for_each_cpu(cpu, ipimask) {
+ hwirq = GIC_SHARED_TO_HWIRQ(base_hwirq + i);
+
+ ret = irq_domain_set_hwirq_and_chip(d, virq + i, hwirq,
+ &gic_edge_irq_controller,
+ NULL);
+ if (ret)
+ goto error;
+
+ ret = irq_domain_set_hwirq_and_chip(d->parent, virq + i, hwirq,
+ &gic_edge_irq_controller,
+ NULL);
+ if (ret)
+ goto error;
+
+ ret = irq_set_irq_type(virq + i, IRQ_TYPE_EDGE_RISING);
+ if (ret)
+ goto error;
+
+ ret = gic_shared_irq_domain_map(d, virq + i, hwirq, cpu);
+ if (ret)
+ goto error;
+
+ i++;
+ }
+
+ return 0;
+error:
+ bitmap_set(ipi_available, base_hwirq, nr_irqs);
+ return ret;
+}
+
+void gic_ipi_domain_free(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ irq_hw_number_t base_hwirq;
+ struct irq_data *data;
+
+ data = irq_get_irq_data(virq);
+ if (!data)
+ return;
+
+ base_hwirq = GIC_HWIRQ_TO_SHARED(irqd_to_hwirq(data));
+ bitmap_set(ipi_available, base_hwirq, nr_irqs);
+}
+
+int gic_ipi_domain_match(struct irq_domain *d, struct device_node *node,
+ enum irq_domain_bus_token bus_token)
+{
+ bool is_ipi;
+
+ switch (bus_token) {
+ case DOMAIN_BUS_IPI:
+ is_ipi = d->bus_token == bus_token;
+ return (!node || to_of_node(d->fwnode) == node) && is_ipi;
+ break;
+ default:
+ return 0;
+ }
+}
+
+static const struct irq_domain_ops gic_ipi_domain_ops = {
+ .xlate = gic_ipi_domain_xlate,
+ .alloc = gic_ipi_domain_alloc,
+ .free = gic_ipi_domain_free,
+ .match = gic_ipi_domain_match,
+};
+
+
+static int __init gic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ unsigned int cpu_vec, i, j, gicconfig, cpu, v[2];
+ unsigned long reserved;
+ phys_addr_t gic_base;
+ struct resource res;
+ size_t gic_len;
+
+ /* Find the first available CPU vector. */
+ i = 0;
+ reserved = (C_SW0 | C_SW1) >> __ffs(C_SW0);
+ while (!of_property_read_u32_index(node, "mti,reserved-cpu-vectors",
+ i++, &cpu_vec))
+ reserved |= BIT(cpu_vec);
+
+ cpu_vec = find_first_zero_bit(&reserved, hweight_long(ST0_IM));
+ if (cpu_vec == hweight_long(ST0_IM)) {
+ pr_err("No CPU vectors available for GIC\n");
+ return -ENODEV;
+ }
+
+ if (of_address_to_resource(node, 0, &res)) {
+ /*
+ * Probe the CM for the GIC base address if not specified
+ * in the device-tree.
+ */
+ if (mips_cm_present()) {
+ gic_base = read_gcr_gic_base() &
+ ~CM_GCR_GIC_BASE_GICEN;
+ gic_len = 0x20000;
+ } else {
+ pr_err("Failed to get GIC memory range\n");
+ return -ENODEV;
+ }
+ } else {
+ gic_base = res.start;
+ gic_len = resource_size(&res);
+ }
+
+ if (mips_cm_present()) {
+ write_gcr_gic_base(gic_base | CM_GCR_GIC_BASE_GICEN);
+ /* Ensure GIC region is enabled before trying to access it */
+ __sync();
+ }
+
+ mips_gic_base = ioremap_nocache(gic_base, gic_len);
+
+ gicconfig = read_gic_config();
+ gic_shared_intrs = gicconfig & GIC_CONFIG_NUMINTERRUPTS;
+ gic_shared_intrs >>= __ffs(GIC_CONFIG_NUMINTERRUPTS);
+ gic_shared_intrs = (gic_shared_intrs + 1) * 8;
+
+ gic_vpes = gicconfig & GIC_CONFIG_PVPS;
+ gic_vpes >>= __ffs(GIC_CONFIG_PVPS);
+ gic_vpes = gic_vpes + 1;
+
+ if (cpu_has_veic) {
+ /* Set EIC mode for all VPEs */
+ for_each_present_cpu(cpu) {
+ write_gic_vl_other(mips_cm_vp_id(cpu));
+ write_gic_vo_ctl(GIC_VX_CTL_EIC);
+ }
+
+ /* Always use vector 1 in EIC mode */
+ gic_cpu_pin = 0;
+ timer_cpu_pin = gic_cpu_pin;
+ set_vi_handler(gic_cpu_pin + GIC_PIN_TO_VEC_OFFSET,
+ __gic_irq_dispatch);
+ } else {
+ gic_cpu_pin = cpu_vec - GIC_CPU_PIN_OFFSET;
+ irq_set_chained_handler(MIPS_CPU_IRQ_BASE + cpu_vec,
+ gic_irq_dispatch);
+ /*
+ * With the CMP implementation of SMP (deprecated), other CPUs
+ * are started by the bootloader and put into a timer based
+ * waiting poll loop. We must not re-route those CPU's local
+ * timer interrupts as the wait instruction will never finish,
+ * so just handle whatever CPU interrupt it is routed to by
+ * default.
+ *
+ * This workaround should be removed when CMP support is
+ * dropped.
+ */
+ if (IS_ENABLED(CONFIG_MIPS_CMP) &&
+ gic_local_irq_is_routable(GIC_LOCAL_INT_TIMER)) {
+ timer_cpu_pin = read_gic_vl_timer_map() & GIC_MAP_PIN_MAP;
+ irq_set_chained_handler(MIPS_CPU_IRQ_BASE +
+ GIC_CPU_PIN_OFFSET +
+ timer_cpu_pin,
+ gic_irq_dispatch);
+ } else {
+ timer_cpu_pin = gic_cpu_pin;
+ }
+ }
+
+ gic_irq_domain = irq_domain_add_simple(node, GIC_NUM_LOCAL_INTRS +
+ gic_shared_intrs, 0,
+ &gic_irq_domain_ops, NULL);
+ if (!gic_irq_domain) {
+ pr_err("Failed to add GIC IRQ domain");
+ return -ENXIO;
+ }
+
+ gic_ipi_domain = irq_domain_add_hierarchy(gic_irq_domain,
+ IRQ_DOMAIN_FLAG_IPI_PER_CPU,
+ GIC_NUM_LOCAL_INTRS + gic_shared_intrs,
+ node, &gic_ipi_domain_ops, NULL);
+ if (!gic_ipi_domain) {
+ pr_err("Failed to add GIC IPI domain");
+ return -ENXIO;
+ }
+
+ irq_domain_update_bus_token(gic_ipi_domain, DOMAIN_BUS_IPI);
+
+ if (node &&
+ !of_property_read_u32_array(node, "mti,reserved-ipi-vectors", v, 2)) {
+ bitmap_set(ipi_resrv, v[0], v[1]);
+ } else {
+ /* Make the last 2 * gic_vpes available for IPIs */
+ bitmap_set(ipi_resrv,
+ gic_shared_intrs - 2 * gic_vpes,
+ 2 * gic_vpes);
+ }
+
+ bitmap_copy(ipi_available, ipi_resrv, GIC_MAX_INTRS);
+
+ board_bind_eic_interrupt = &gic_bind_eic_interrupt;
+
+ /* Setup defaults */
+ for (i = 0; i < gic_shared_intrs; i++) {
+ change_gic_pol(i, GIC_POL_ACTIVE_HIGH);
+ change_gic_trig(i, GIC_TRIG_LEVEL);
+ write_gic_rmask(i);
+ }
+
+ for (i = 0; i < gic_vpes; i++) {
+ write_gic_vl_other(mips_cm_vp_id(i));
+ for (j = 0; j < GIC_NUM_LOCAL_INTRS; j++) {
+ if (!gic_local_irq_is_routable(j))
+ continue;
+ write_gic_vo_rmask(BIT(j));
+ }
+ }
+
+ return 0;
+}
+IRQCHIP_DECLARE(mips_gic, "mti,gic", gic_of_init);