This patch add the irq hierarchy for the virt board.
Signed-off-by: Xiaojuan Yang <yangxiaoj...@loongson.cn>
Signed-off-by: Song Gao <gaos...@loongson.cn>
---
hw/loongarch/loongson3.c | 85 ++++++++++++++++++++++++++++++++++++++
include/hw/pci-host/ls7a.h | 13 ++++++
2 files changed, 98 insertions(+)
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
index 6e796c2c08..cc7ee02003 100644
--- a/hw/loongarch/loongson3.c
+++ b/hw/loongarch/loongson3.c
@@ -15,6 +15,10 @@
#include "sysemu/runstate.h"
#include "sysemu/reset.h"
#include "hw/loongarch/loongarch.h"
+#include "hw/intc/loongarch_ipi.h"
+#include "hw/intc/loongarch_extioi.h"
+#include "hw/intc/loongarch_pch_pic.h"
+#include "hw/intc/loongarch_pch_msi.h"
#include "hw/pci-host/ls7a.h"
static void loongarch_cpu_reset(void *opaque)
@@ -93,6 +97,84 @@ static void loongarch_cpu_set_irq(void *opaque, int irq, int
level)
}
}
+static void loongarch_irq_init(LoongArchMachineState *lams)
+{
+ MachineState *ms = MACHINE(lams);
+ DeviceState *ipi, *extioi, *pch_pic, *pch_msi, *cpudev;
+ SysBusDevice *d;
+ int cpu, pin, i;
+ unsigned long ipi_addr;
+ CPULoongArchState *env;
+
+ ipi = qdev_new(TYPE_LOONGARCH_IPI);
+ d = SYS_BUS_DEVICE(ipi);
+ sysbus_realize_and_unref(d, &error_fatal);
+ for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
+ cpudev = DEVICE(qemu_get_cpu(cpu));
+ env = (qemu_get_cpu(cpu))->env_ptr;
+ ipi_addr = SMP_IPI_MAILBOX + cpu * 0x100;
+ memory_region_add_subregion(env->system_iocsr, ipi_addr,
+ sysbus_mmio_get_region(d, cpu));
+ /* connect ipi irq to cpu irq */
+ qdev_connect_gpio_out(ipi, cpu, qdev_get_gpio_in(cpudev, IRQ_IPI));
+ }
+
+ extioi = qdev_new(TYPE_LOONGARCH_EXTIOI);
+ d = SYS_BUS_DEVICE(extioi);
+ sysbus_realize_and_unref(d, &error_fatal);
+ for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
+ env = (qemu_get_cpu(cpu))->env_ptr;
+ memory_region_add_subregion(env->system_iocsr, APIC_BASE,
+ sysbus_mmio_get_region(d, cpu * 4));
+ memory_region_add_subregion_overlap(env->system_iocsr, ENABLE_OFFSET,
+ sysbus_mmio_get_region(d, cpu * 4
+ 1), 1);
+ memory_region_add_subregion_overlap(env->system_iocsr, IPMAP_OFFSET,
+ sysbus_mmio_get_region(d, cpu * 4
+ 2), 1);
+ memory_region_add_subregion_overlap(env->system_iocsr, COREMAP_OFFSET,
+ sysbus_mmio_get_region(d, cpu * 4
+ 3), 1);
+ }
+
+ for (i = 0; i < EXTIOI_IRQS; i++) {
+ sysbus_connect_irq(d, i, qdev_get_gpio_in(extioi, i));
+ }
+
+ /*
+ * connect ext irq to the cpu irq
+ * cpu_pin[9:2] <= intc_pin[7:0]
+ */
+ for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
+ cpudev = DEVICE(qemu_get_cpu(cpu));
+ for (pin = 0; pin < LS3A_INTC_IP; pin++) {
+ qdev_connect_gpio_out(extioi, (cpu * 8 + pin),
+ qdev_get_gpio_in(cpudev, pin + 2));
+ }
+ }
+
+ pch_pic = qdev_new(TYPE_LOONGARCH_PCH_PIC);
+ d = SYS_BUS_DEVICE(pch_pic);
+ sysbus_realize_and_unref(d, &error_fatal);
+ memory_region_add_subregion(get_system_memory(), LS7A_IOAPIC_REG_BASE,
+ sysbus_mmio_get_region(d, 0));
+ memory_region_add_subregion_overlap(get_system_memory(),
+ LS7A_IOAPIC_REG_BASE +
PCH_PIC_ROUTE_ENTRY_OFFSET,
+ sysbus_mmio_get_region(d, 1), 1);
+
+ /* Connect 64 pch_pic irqs to extioi */
+ for (int i = 0; i < PCH_PIC_IRQ_NUM; i++) {
+ sysbus_connect_irq(d, i, qdev_get_gpio_in(extioi, i));
+ }
+
+ pch_msi = qdev_new(TYPE_LOONGARCH_PCH_MSI);
+ d = SYS_BUS_DEVICE(pch_msi);
+ sysbus_realize_and_unref(d, &error_fatal);
+ sysbus_mmio_map(d, 0, LS7A_PCH_MSI_ADDR_LOW);
+ for (i = 0; i < PCH_MSI_IRQ_NUM; i++) {
+ /* Connect 192 pch_msi irqs to extioi */
+ sysbus_connect_irq(d, i,
+ qdev_get_gpio_in(extioi, i + PCH_MSI_IRQ_START));
+ }
+}
+
static void loongarch_init(MachineState *machine)
{
const char *cpu_model = machine->cpu_type;
@@ -145,6 +227,9 @@ static void loongarch_init(MachineState *machine)
get_system_io(), 0, LOONGARCH_ISA_IO_SIZE);
memory_region_add_subregion(get_system_memory(), LOONGARCH_ISA_IO_BASE,
&lams->isa_io);
+
+ /* Initialize the IO interrupt subsystem */
+ loongarch_irq_init(lams);
}
static void loongarch_class_init(ObjectClass *oc, void *data)
diff --git a/include/hw/pci-host/ls7a.h b/include/hw/pci-host/ls7a.h
index 6adbfbe443..447450828e 100644
--- a/include/hw/pci-host/ls7a.h
+++ b/include/hw/pci-host/ls7a.h
@@ -24,6 +24,19 @@
#define LS7A_PCI_IO_BASE 0x18004000UL
#define LS7A_PCI_IO_SIZE 0xC000
+#define LS7A_PCH_REG_BASE 0x10000000UL
+#define LS7A_IOAPIC_REG_BASE (LS7A_PCH_REG_BASE)
+#define LS7A_PCH_MSI_ADDR_LOW 0x2FF00000UL
+
+/*
+ * According to the kernel pch irq start from 64 offset
+ * 0 ~ 16 irqs used for non-pci device while 16 ~ 64 irqs
+ * used for pci device.
+ */
+#define PCH_PIC_IRQ_OFFSET 64
+#define LS7A_DEVICE_IRQS 16
+#define LS7A_PCI_IRQS 48
+
struct LS7APCIState {
/*< private >*/
PCIDevice parent_obj;
--
2.27.0
