This patch realize the EIOINTC interrupt controller.
Signed-off-by: Xiaojuan Yang <yangxiaoj...@loongson.cn>
Signed-off-by: Song Gao <gaos...@loongson.cn>
---
hw/intc/Kconfig | 3 +
hw/intc/loongarch_extioi.c | 483 +++++++++++++++++++++++++++++
hw/intc/meson.build | 1 +
hw/intc/trace-events | 9 +
hw/loongarch/Kconfig | 1 +
include/hw/intc/loongarch_extioi.h | 60 ++++
6 files changed, 557 insertions(+)
create mode 100644 hw/intc/loongarch_extioi.c
create mode 100644 include/hw/intc/loongarch_extioi.h
diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
index 71c04c328e..28bd1f185d 100644
--- a/hw/intc/Kconfig
+++ b/hw/intc/Kconfig
@@ -96,3 +96,6 @@ config LOONGARCH_PCH_MSI
select MSI_NONBROKEN
bool
select UNIMP
+
+config LOONGARCH_EXTIOI
+ bool
diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
new file mode 100644
index 0000000000..1d9317c5bd
--- /dev/null
+++ b/hw/intc/loongarch_extioi.c
@@ -0,0 +1,483 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson 3A5000 ext interrupt controller emulation
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/module.h"
+#include "qemu/log.h"
+#include "hw/irq.h"
+#include "hw/sysbus.h"
+#include "hw/loongarch/virt.h"
+#include "hw/qdev-properties.h"
+#include "exec/address-spaces.h"
+#include "hw/intc/loongarch_extioi.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+
+static void extioi_update_irq(LoongArchExtIOI *s, int irq_num, int level)
+{
+ uint64_t ipnum, cpu;
+
+ /*
+ * Routing in group of 32 interrupts.
+ * The default value of csr[0x420][49]
+ * is 0 and nobody will change it,
+ * so 'ipmap' use bitmap function.
+ */
+ ipnum = ldub_p((void *)&s->ipmap + (irq_num / 32)) & 0xf;
+ ipnum = find_first_bit(&ipnum, 4);
+ ipnum = (ipnum == 4) ? 0 : ipnum;
+
+ cpu = ldub_p((void *)s->coremap + irq_num) & 0xf;
+ cpu = find_first_bit(&cpu, 4);
+ cpu = (cpu == 4) ? 0 : cpu;
+
+ if (level) {
+ if (test_bit(irq_num, (unsigned long *)s->enable) == false) {
+ return;
+ }
+ bitmap_set((unsigned long *)s->coreisr[cpu], irq_num, 1);
+ qemu_set_irq(s->parent_irq[cpu][ipnum], level);
+ } else {
+ bitmap_clear((unsigned long *)s->coreisr[cpu], irq_num, 1);
+ qemu_set_irq(s->parent_irq[cpu][ipnum], level);
+ }
+}
+
+static void extioi_setirq(void *opaque, int irq, int level)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ trace_loongarch_extioi_setirq(irq, level);
+ extioi_update_irq(s, irq, level);
+}
+
+static uint32_t extioi_readb(void *opaque, hwaddr addr)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ unsigned long offset, reg_count;
+ uint8_t ret = 0;
+ int cpu;
+
+ offset = addr & 0xffff;
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ ret = ldub_p((void *)s->enable + (offset - EXTIOI_ENABLE_START));
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ ret = ldub_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START));
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = ((offset - EXTIOI_COREISR_START) & 0x1f);
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+ ret = ldub_p((void *)s->coreisr[cpu] + reg_count);
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ ret = ldub_p((void *)&s->ipmap + (offset - EXTIOI_IPMAP_START));
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ ret = ldub_p((void *)s->coremap + (offset - EXTIOI_COREMAP_START));
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ ret = ldub_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START));
+ break;
+ default:
+ break;
+ }
+ trace_loongarch_extioi_readb((uint32_t)addr, ret);
+ return ret;
+}
+
+static uint32_t extioi_readw(void *opaque, hwaddr addr)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ unsigned long offset, reg_count;
+ uint32_t ret = 0;
+ int cpu;
+
+ offset = addr & 0xffff;
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ ret = ldl_p((void *)s->enable + (offset - EXTIOI_ENABLE_START));
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ ret = ldl_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START));
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = ((offset - EXTIOI_COREISR_START) & 0x1f);
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+ ret = ldl_p((void *)s->coreisr[cpu] + reg_count);
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ ret = ldl_p((void *)&s->ipmap + (offset - EXTIOI_IPMAP_START));
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ ret = ldl_p((void *)s->coremap + (offset - EXTIOI_COREMAP_START));
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ ret = ldl_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START));
+ break;
+ default:
+ break;
+ }
+ trace_loongarch_extioi_readw((uint32_t)addr, ret);
+ return ret;
+}
+
+static uint64_t extioi_readl(void *opaque, hwaddr addr)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ unsigned long offset, reg_count;
+ uint64_t ret = 0;
+ int cpu;
+
+ offset = addr & 0xffff;
+
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ ret = ldq_p((void *)s->enable + (offset - EXTIOI_ENABLE_START));
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ ret = ldq_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START));
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = ((offset - EXTIOI_COREISR_START) & 0x1f);
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+ ret = ldq_p((void *)s->coreisr[cpu] + reg_count);
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ ret = ldq_p((void *)&s->ipmap + (offset - EXTIOI_IPMAP_START));
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ ret = ldq_p((void *)s->coremap + (offset - EXTIOI_COREMAP_START));
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ ret = ldq_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START));
+ break;
+ default:
+ break;
+ }
+ trace_loongarch_extioi_readl((uint32_t)addr, ret);
+ return ret;
+}
+
+static void extioi_writeb(void *opaque, hwaddr addr, uint32_t value,
+ unsigned size)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ unsigned long offset, reg_count;
+ int cpu, i, j, level, bits;
+ uint64_t old_data, val = value & 0xff;
+
+ offset = addr & 0xffff;
+
+ trace_loongarch_extioi_writeb(size, (uint32_t)addr, (uint8_t)val);
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ reg_count = (offset - EXTIOI_ENABLE_START);
+ old_data = ldub_p((void *)s->enable + reg_count);
+ if (old_data != val) {
+ stb_p((void *)s->enable + reg_count, (uint8_t)val);
+ old_data = old_data ^ val;
+ bits = size * 8;
+ while ((i = find_first_bit(&old_data, bits)) != bits) {
+ level = test_bit(i, &val);
+ extioi_update_irq(s, i + reg_count * 8, level);
+ clear_bit(i, &old_data);
+ }
+ }
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ stb_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START),
(uint8_t)val);
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = (offset - EXTIOI_COREISR_START) & 0x1f;
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+
+ old_data = ldub_p((void *)s->coreisr[cpu] + reg_count);
+ stb_p((void *)s->coreisr[cpu] + reg_count, (uint8_t)(old_data & ~val));
+
+ if (old_data != (old_data & ~val)) {
+ bits = size * 8;
+
+ while ((i = find_first_bit(&val, bits)) != bits) {
+ j = test_bit(i, &old_data);
+ if (j) {
+ extioi_update_irq(s, i + reg_count * 8, 0);
+ }
+ clear_bit(i, &val);
+ }
+ }
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ /* Drop arch.core_ip_mask use s->ipmap */
+ reg_count = (offset - EXTIOI_IPMAP_START);
+ stb_p((void *)&s->ipmap + reg_count, (uint8_t)val);
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ reg_count = (offset - EXTIOI_COREMAP_START);
+
+ /* Only map the core */
+ while (val) {
+ stb_p((void *)s->coremap + reg_count, (uint8_t)val);
+ val = val >> 8;
+ }
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ stb_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START),
+ (uint8_t)val);
+ break;
+ default:
+ break;
+ }
+}
+
+static void extioi_writew(void *opaque, hwaddr addr, uint32_t val,
+ unsigned size)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ int cpu, level;
+ uint32_t offset, reg_count, i, j, bits;
+ uint64_t old_data, value = val;
+ offset = addr & 0xffff;
+ trace_loongarch_extioi_writew(size, (uint32_t)addr, val);
+
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ reg_count = (offset - EXTIOI_ENABLE_START);
+ old_data = ldl_p((void *)s->enable + reg_count);
+ if (old_data != val) {
+ stl_p((void *)s->enable + reg_count, val);
+ old_data = old_data ^ val;
+
+ bits = size * 8;
+ while ((i = find_first_bit(&old_data, bits)) != bits) {
+ level = test_bit(i, &value);
+ extioi_update_irq(s, i + reg_count * 8, level);
+ clear_bit(i, &old_data);
+ }
+ }
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ stl_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START), val);
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = ((offset - EXTIOI_COREISR_START) & 0x1f);
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+ /* Ext_core_ioisr */
+ old_data = ldl_p((void *)s->coreisr[cpu] + reg_count);
+ stl_p((void *)s->coreisr[cpu] + reg_count, (old_data & ~val));
+
+ if (old_data != (old_data & ~val)) {
+ bits = size * 8;
+ while ((i = find_first_bit(&value, bits)) != bits) {
+ j = test_bit(i, &old_data);
+ if (j) {
+ extioi_update_irq(s, i + reg_count * 8, 0);
+ }
+ clear_bit(i, &value);
+ }
+ }
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ /* Drop arch.core_ip_mask use s->ipmap */
+ reg_count = (offset - EXTIOI_IPMAP_START);
+ stl_p((void *)&s->ipmap + reg_count, val);
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ reg_count = (offset - EXTIOI_COREMAP_START);
+ /* Only map the core */
+ while (val) {
+ stl_p((void *)s->coremap + reg_count, val);
+ val = val >> 8;
+ }
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ stl_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START), val);
+ break;
+ default:
+ break;
+ }
+}
+
+static void extioi_writel(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ LoongArchExtIOI *s = LOONGARCH_EXTIOI(opaque);
+ int cpu, level, i, j, bits;
+ uint64_t offset, old_data, reg_count;
+
+ offset = addr & 0xffff;
+ trace_loongarch_extioi_writel(size, (uint32_t)addr, val);
+ switch (offset) {
+ case EXTIOI_ENABLE_START ... EXTIOI_ENABLE_END - 1:
+ reg_count = (offset - EXTIOI_ENABLE_START);
+ old_data = s->enable[reg_count];
+ if (old_data != val) {
+ s->enable[reg_count] = val;
+ old_data = old_data ^ val;
+
+ bits = size * 8;
+ while ((i = find_first_bit(&old_data, bits)) != bits) {
+ level = test_bit(i, &val);
+ extioi_update_irq(s, i + reg_count * 8, level);
+ clear_bit(i, &old_data);
+ }
+ }
+ break;
+ case EXTIOI_BOUNCE_START ... EXTIOI_BOUNCE_END - 1:
+ stq_p((void *)s->bounce + (offset - EXTIOI_BOUNCE_START), val);
+ break;
+ case EXTIOI_COREISR_START ... EXTIOI_COREISR_END - 1:
+ reg_count = ((offset - EXTIOI_COREISR_START) & 0x1f);
+ cpu = ((offset - EXTIOI_COREISR_START) >> 8) & 0x3;
+
+ /* core_ext_ioisr */
+ old_data = ldq_p((void *)s->coreisr[cpu] + reg_count);
+ stq_p((void *)s->coreisr[cpu] + reg_count, (old_data & ~val));
+
+ if (old_data != (old_data & ~val)) {
+ bits = size * 8;
+ while ((i = find_first_bit(&val, bits)) != bits) {
+ j = test_bit(i, &old_data);
+ if (j) {
+ extioi_update_irq(s, i + reg_count * 8, 0);
+ }
+ clear_bit(i, &val);
+ }
+ }
+ break;
+ case EXTIOI_IPMAP_START ... EXTIOI_IPMAP_END - 1:
+ /* Drop arch.core_ip_mask use s->ipmap */
+ reg_count = (offset - EXTIOI_IPMAP_START);
+ stq_p((void *)&s->ipmap + reg_count, val);
+ break;
+ case EXTIOI_COREMAP_START ... EXTIOI_COREMAP_END - 1:
+ reg_count = (offset - EXTIOI_COREMAP_START);
+ /* Only map the core */
+ while (val) {
+ stq_p((void *)s->coremap + reg_count, val);
+ val = val >> 8;
+ }
+ break;
+ case EXTIOI_NODETYPE_START ... EXTIOI_NODETYPE_END - 1:
+ stq_p((void *)s->nodetype + (offset - EXTIOI_NODETYPE_START), val);
+ break;
+ default:
+ break;
+ }
+}
+
+static uint64_t extioi_readfn(void *opaque, hwaddr addr, unsigned size)
+{
+ switch (size) {
+ case 1:
+ return extioi_readb(opaque, addr);
+ case 4:
+ return extioi_readw(opaque, addr);
+ case 8:
+ return extioi_readl(opaque, addr);
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static void extioi_writefn(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ switch (size) {
+ case 1:
+ extioi_writeb(opaque, addr, value, size);
+ break;
+ case 4:
+ extioi_writew(opaque, addr, value, size);
+ break;
+ case 8:
+ extioi_writel(opaque, addr, value, size);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static const MemoryRegionOps extioi_ops = {
+ .read = extioi_readfn,
+ .write = extioi_writefn,
+ .impl.min_access_size = 1,
+ .impl.max_access_size = 8,
+ .valid.min_access_size = 1,
+ .valid.max_access_size = 8,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void loongarch_extioi_realize(DeviceState *dev, Error **errp)
+{
+ LoongArchMachineState *lams = LOONGARCH_MACHINE(qdev_get_machine());
+ MachineState *ms = MACHINE(lams);
+ LoongArchExtIOI *p = LOONGARCH_EXTIOI(dev);
+ int i, cpu, pin;
+
+ qdev_init_gpio_in(dev, extioi_setirq, EXTIOI_IRQS);
+
+ for (i = 0; i < EXTIOI_IRQS; i++) {
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &p->irq[i]);
+ }
+ /* two ways to access extioi: iocsr memory and system memory */
+ memory_region_init_io(&p->extioi_iocsr_mem, OBJECT(p), &extioi_ops, p,
+ "loongarch_extioi_iocsr", 0x900);
+ sysbus_init_mmio(SYS_BUS_DEVICE(dev), &p->extioi_iocsr_mem);
+
+ memory_region_init_io(&p->extioi_system_mem, OBJECT(p), &extioi_ops, p,
+ "loongarch_extioi", 0x900);
+ sysbus_init_mmio(SYS_BUS_DEVICE(dev), &p->extioi_system_mem);
+
+ for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
+ for (pin = 0; pin < LS3A_INTC_IP; pin++) {
+ qdev_init_gpio_out(dev, &p->parent_irq[cpu][pin], 1);
+ }
+ }
+}
+
+static const VMStateDescription vmstate_loongarch_extioi = {
+ .name = TYPE_LOONGARCH_EXTIOI,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64_ARRAY(enable, LoongArchExtIOI,
+ EXTIOI_IRQS_BITMAP_SIZE / 8),
+ VMSTATE_UINT64_ARRAY(bounce, LoongArchExtIOI,
+ EXTIOI_IRQS_BITMAP_SIZE / 8),
+ VMSTATE_UINT64_2DARRAY(coreisr, LoongArchExtIOI,
+ MAX_CORES, EXTIOI_IRQS_BITMAP_SIZE / 8),
+ VMSTATE_UINT64(ipmap, LoongArchExtIOI),
+ VMSTATE_UINT64_ARRAY(coremap, LoongArchExtIOI,
+ EXTIOI_IRQS_COREMAP_SIZE / 8),
+ VMSTATE_UINT64_ARRAY(nodetype, LoongArchExtIOI,
+ EXTIOI_IRQS_NODETYPE_SIZE / 4),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void loongarch_extioi_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->vmsd = &vmstate_loongarch_extioi;
+ dc->realize = loongarch_extioi_realize;
+}
+
+static const TypeInfo loongarch_extioi_info = {
+ .name = TYPE_LOONGARCH_EXTIOI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(struct LoongArchExtIOI),
+ .class_init = loongarch_extioi_class_init,
+};
+
+static void loongarch_extioi_register_types(void)
+{
+ type_register_static(&loongarch_extioi_info);
+}
+
+type_init(loongarch_extioi_register_types)
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 77a30cec33..405e18f4bb 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -65,3 +65,4 @@ specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true:
files('m68k_irqc.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_IPI', if_true:
files('loongarch_ipi.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true:
files('loongarch_pch_pic.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true:
files('loongarch_pch_msi.c'))
+specific_ss.add(when: 'CONFIG_LOONGARCH_EXTIOI', if_true:
files('loongarch_extioi.c'))
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index 8bcc1b6992..285d64ab83 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -303,3 +303,12 @@ loongarch_pch_pic_writeb(unsigned size, uint32_t addr,
unsigned long val) "size:
# loongarch_pch_msi.c
loongarch_msi_set_irq(int irq_num) "set msi irq %d"
+
+# loongarch_extioi.c
+loongarch_extioi_setirq(int irq, int level) "set extirq irq %d level %d"
+loongarch_extioi_readb(uint32_t addr, uint8_t val) "addr: 0x%"PRIx32 "val:
0x%" PRIu8
+loongarch_extioi_readw(uint32_t addr, uint32_t val) "addr: 0x%"PRIx32 "val:
0x%" PRIx32
+loongarch_extioi_readl(uint32_t addr, uint64_t val) "addr: 0x%"PRIx32 "val:
0x%" PRIx64
+loongarch_extioi_writeb(unsigned size, uint32_t addr, uint8_t val) "size: %u
addr: 0x%"PRIx32 "val: 0x%" PRIu8
+loongarch_extioi_writew(unsigned size, uint32_t addr, uint32_t val) "size: %u
addr: 0x%"PRIx32 "val: 0x%" PRIx32
+loongarch_extioi_writel(unsigned size, uint32_t addr, uint64_t val) "size: %u
addr: 0x%"PRIx32 "val: 0x%" PRIx64
diff --git a/hw/loongarch/Kconfig b/hw/loongarch/Kconfig
index d814fc6103..f779087416 100644
--- a/hw/loongarch/Kconfig
+++ b/hw/loongarch/Kconfig
@@ -5,3 +5,4 @@ config LOONGARCH_VIRT
select LOONGARCH_IPI
select LOONGARCH_PCH_PIC
select LOONGARCH_PCH_MSI
+ select LOONGARCH_EXTIOI
diff --git a/include/hw/intc/loongarch_extioi.h
b/include/hw/intc/loongarch_extioi.h
new file mode 100644
index 0000000000..5482483a5f
--- /dev/null
+++ b/include/hw/intc/loongarch_extioi.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch 3A5000 ext interrupt controller definitions
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "hw/sysbus.h"
+#include "hw/loongarch/virt.h"
+
+#ifndef LOONGARCH_EXTIOI_H
+#define LOONGARCH_EXTIOI_H
+
+#define LS3A_INTC_IP 8
+#define MAX_CORES LOONGARCH_MAX_VCPUS
+#define EXTIOI_IRQS (256)
+#define EXTIOI_IRQS_BITMAP_SIZE (256 / 8)
+/* map to ipnum per 32 irqs */
+#define EXTIOI_IRQS_IPMAP_SIZE (256 / 32)
+#define EXTIOI_IRQS_COREMAP_SIZE 256
+#define EXTIOI_IRQS_NODETYPE_SIZE 16
+
+#define APIC_OFFSET 0x400
+#define APIC_BASE (0x1000ULL + APIC_OFFSET)
+
+#define EXTIOI_NODETYPE_START (0x4a0 - APIC_OFFSET)
+#define EXTIOI_NODETYPE_END (0x4c0 - APIC_OFFSET)
+#define EXTIOI_IPMAP_START (0x4c0 - APIC_OFFSET)
+#define EXTIOI_IPMAP_END (0x4c8 - APIC_OFFSET)
+#define EXTIOI_ENABLE_START (0x600 - APIC_OFFSET)
+#define EXTIOI_ENABLE_END (0x620 - APIC_OFFSET)
+#define EXTIOI_BOUNCE_START (0x680 - APIC_OFFSET)
+#define EXTIOI_BOUNCE_END (0x6a0 - APIC_OFFSET)
+#define EXTIOI_ISR_START (0x700 - APIC_OFFSET)
+#define EXTIOI_ISR_END (0x720 - APIC_OFFSET)
+#define EXTIOI_COREISR_START (0x800 - APIC_OFFSET)
+#define EXTIOI_COREISR_END (0xB20 - APIC_OFFSET)
+#define EXTIOI_COREMAP_START (0xC00 - APIC_OFFSET)
+#define EXTIOI_COREMAP_END (0xD00 - APIC_OFFSET)
+
+#define EXTIOI_SYSTEM_MEM 0x1fe01400
+#define TYPE_LOONGARCH_EXTIOI "loongarch.extioi"
+OBJECT_DECLARE_SIMPLE_TYPE(LoongArchExtIOI, LOONGARCH_EXTIOI)
+struct LoongArchExtIOI {
+ SysBusDevice parent_obj;
+ /* hardware state */
+ uint64_t enable[EXTIOI_IRQS_BITMAP_SIZE / 8];
+ uint64_t bounce[EXTIOI_IRQS_BITMAP_SIZE / 8];
+ uint64_t coreisr[MAX_CORES][EXTIOI_IRQS_BITMAP_SIZE / 8];
+ uint64_t ipmap;
+ uint64_t coremap[EXTIOI_IRQS_COREMAP_SIZE / 8];
+ uint64_t nodetype[EXTIOI_IRQS_NODETYPE_SIZE / 4];
+
+ qemu_irq parent_irq[MAX_CORES][LS3A_INTC_IP];
+ qemu_irq irq[EXTIOI_IRQS];
+ MemoryRegion extioi_iocsr_mem;
+ MemoryRegion extioi_system_mem;
+};
+
+#endif /* LOONGARCH_EXTIOI_H */
--
2.31.1
