This implementation provides emulation for the Xiangshan Kunminghu SoC,
including support for UART, CLINT, IMSIC, and APLIC devices.
More details can be found at
https://github.com/OpenXiangShan/XiangShan
Please note the following parameters when running the Xiangshan Kunminghu
machine:
1.`-m`: Configure RAM size of the machine.
1.`-cpu`: Only the `xiangshan-kunminghu` type is acceptable.
2.`-smp`: Specify the number of harts, ranging from 1 to 16.
3.`-bios`: This is the only parameter accepted by the Xiangshan Kunminghu
machine
to obtain the boot image. You need to compile and link the firmware, kernel,
and Device Tree (FDT) into a single binary file, such as `fw_payload.bin`.
Signed-off-by: qinshaoqing <qinshaoq...@bosc.ac.cn>
Signed-off-by: Yang Wang <wangy...@bosc.ac.cn>
Signed-off-by: Yu Hu <h...@bosc.ac.cn>
Signed-off-by: Ran Wang <wang...@bosc.ac.cn>
Signed-off-by: Borong Huang <huangbor...@bosc.ac.cn>
---
configs/devices/riscv64-softmmu/default.mak | 1 +
hw/riscv/Kconfig | 9 +
hw/riscv/meson.build | 1 +
hw/riscv/xiangshan_kmh.c | 214 ++++++++++++++++++++
include/hw/riscv/xiangshan_kmh.h | 77 +++++++
5 files changed, 302 insertions(+)
create mode 100644 hw/riscv/xiangshan_kmh.c
create mode 100644 include/hw/riscv/xiangshan_kmh.h
diff --git a/configs/devices/riscv64-softmmu/default.mak
b/configs/devices/riscv64-softmmu/default.mak
index 39ed3a0061..e485bbd1a3 100644
--- a/configs/devices/riscv64-softmmu/default.mak
+++ b/configs/devices/riscv64-softmmu/default.mak
@@ -11,3 +11,4 @@
# CONFIG_RISCV_VIRT=n
# CONFIG_MICROCHIP_PFSOC=n
# CONFIG_SHAKTI_C=n
+# CONFIG_XIANGSHAN_KUNMINGHU=n
diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
index e6a0ac1fa1..fc9c35bd98 100644
--- a/hw/riscv/Kconfig
+++ b/hw/riscv/Kconfig
@@ -119,3 +119,12 @@ config SPIKE
select HTIF
select RISCV_ACLINT
select SIFIVE_PLIC
+
+config XIANGSHAN_KUNMINGHU
+ bool
+ default y
+ depends on RISCV64
+ select RISCV_ACLINT
+ select RISCV_APLIC
+ select RISCV_IMSIC
+ select SERIAL_MM
diff --git a/hw/riscv/meson.build b/hw/riscv/meson.build
index c22f3a7216..2a8d5b136c 100644
--- a/hw/riscv/meson.build
+++ b/hw/riscv/meson.build
@@ -13,5 +13,6 @@ riscv_ss.add(when: 'CONFIG_ACPI', if_true:
files('virt-acpi-build.c'))
riscv_ss.add(when: 'CONFIG_RISCV_IOMMU', if_true: files(
'riscv-iommu.c', 'riscv-iommu-pci.c', 'riscv-iommu-sys.c',
'riscv-iommu-hpm.c'))
riscv_ss.add(when: 'CONFIG_MICROBLAZE_V', if_true:
files('microblaze-v-generic.c'))
+riscv_ss.add(when: 'CONFIG_XIANGSHAN_KUNMINGHU', if_true:
files('xiangshan_kmh.c'))
hw_arch += {'riscv': riscv_ss}
diff --git a/hw/riscv/xiangshan_kmh.c b/hw/riscv/xiangshan_kmh.c
new file mode 100644
index 0000000000..c64b7fc2c7
--- /dev/null
+++ b/hw/riscv/xiangshan_kmh.c
@@ -0,0 +1,214 @@
+/*
+ * Xiangshan Kunminghu SoC emulation
+ *
+ * Copyright (c) 2025 Beijing Institute of Open Source Chip (BOSC)
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Provides a board compatible with the Xiangshan Kunminghu SoC platform:
+ *
+ * 0) UART (16550A)
+ * 1) CLINT (Core-Local Interruptor)
+ * 2) IMSIC (Incoming MSI Controller)
+ * 3) APLIC (Advanced Platform-Level Interrupt Controller)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "exec/address-spaces.h"
+#include "hw/boards.h"
+#include "hw/char/serial-mm.h"
+#include "hw/intc/riscv_aclint.h"
+#include "hw/intc/riscv_aplic.h"
+#include "hw/intc/riscv_imsic.h"
+#include "hw/qdev-properties.h"
+#include "hw/riscv/boot.h"
+#include "hw/riscv/xiangshan_kmh.h"
+#include "hw/riscv/riscv_hart.h"
+#include "system/system.h"
+
+static const MemMapEntry xiangshan_kmh_memmap[] = {
+ [XIANGSHAN_KMH_ROM] = { 0x1000, 0xF000 },
+ [XIANGSHAN_KMH_UART0] = { 0x310B0000, 0x10000 },
+ [XIANGSHAN_KMH_CLINT] = { 0x38000000, 0x10000 },
+ [XIANGSHAN_KMH_APLIC_M] = { 0x31100000, 0x4000 },
+ [XIANGSHAN_KMH_APLIC_S] = { 0x31120000, 0x4000 },
+ [XIANGSHAN_KMH_IMSIC_M] = { 0x3A800000, 0x10000 },
+ [XIANGSHAN_KMH_IMSIC_S] = { 0x3B000000, 0x80000 },
+ [XIANGSHAN_KMH_DRAM] = { 0x80000000, 0x0 },
+};
+
+static DeviceState *xiangshan_kmh_create_aia(uint32_t num_harts)
+{
+ int i;
+ const MemMapEntry *memmap = xiangshan_kmh_memmap;
+ hwaddr addr = 0;
+ DeviceState *aplic_m = NULL;
+
+ /* M-level IMSICs */
+ addr = memmap[XIANGSHAN_KMH_IMSIC_M].base;
+ for (i = 0; i < num_harts; i++) {
+ riscv_imsic_create(addr + i * IMSIC_HART_SIZE(0), i, true,
+ 1, XIANGSHAN_KMH_IMSIC_NUM_IDS);
+ }
+
+ /* S-level IMSICs */
+ addr = memmap[XIANGSHAN_KMH_IMSIC_S].base;
+ for (i = 0; i < num_harts; i++) {
+ riscv_imsic_create(addr +
+ i * IMSIC_HART_SIZE(XIANGSHAN_KMH_IMSIC_GUEST_BITS),
+ i, false, 1 + XIANGSHAN_KMH_IMSIC_GUEST_BITS,
+ XIANGSHAN_KMH_IMSIC_NUM_IDS);
+ }
+
+ /* M-level APLIC */
+ aplic_m = riscv_aplic_create(memmap[XIANGSHAN_KMH_APLIC_M].base,
+ memmap[XIANGSHAN_KMH_APLIC_M].size,
+ 0, 0, XIANGSHAN_KMH_APLIC_NUM_SOURCES,
+ 1, true, true, NULL);
+
+ /* S-level APLIC */
+ riscv_aplic_create(memmap[XIANGSHAN_KMH_APLIC_S].base,
+ memmap[XIANGSHAN_KMH_APLIC_S].size,
+ 0, 0, XIANGSHAN_KMH_APLIC_NUM_SOURCES,
+ 1, true, false, aplic_m);
+
+ return aplic_m;
+}
+
+static void xiangshan_kmh_soc_realize(DeviceState *dev, Error **errp)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ XiangshanKmhSoCState *s = XIANGSHAN_KMH_SOC(dev);
+ const MemMapEntry *memmap = xiangshan_kmh_memmap;
+ MemoryRegion *system_memory = get_system_memory();
+ uint32_t num_harts = ms->smp.cpus;
+
+ qdev_prop_set_uint32(DEVICE(&s->cpus), "num-harts", num_harts);
+ qdev_prop_set_uint32(DEVICE(&s->cpus), "hartid-base", 0);
+ qdev_prop_set_string(DEVICE(&s->cpus), "cpu-type",
+ TYPE_RISCV_CPU_XIANGSHAN_KMH);
+ sysbus_realize(SYS_BUS_DEVICE(&s->cpus), &error_fatal);
+
+ /* AIA */
+ s->irqchip = xiangshan_kmh_create_aia(num_harts);
+
+ /* UART */
+ serial_mm_init(system_memory, memmap[XIANGSHAN_KMH_UART0].base, 2,
+ qdev_get_gpio_in(s->irqchip, XIANGSHAN_KMH_UART0_IRQ),
+ 115200, serial_hd(0), DEVICE_LITTLE_ENDIAN);
+
+ /* CLINT */
+ riscv_aclint_swi_create(memmap[XIANGSHAN_KMH_CLINT].base,
+ 0, num_harts, false);
+ riscv_aclint_mtimer_create(memmap[XIANGSHAN_KMH_CLINT].base +
+ RISCV_ACLINT_SWI_SIZE,
+ RISCV_ACLINT_DEFAULT_MTIMER_SIZE,
+ 0, num_harts, RISCV_ACLINT_DEFAULT_MTIMECMP,
+ RISCV_ACLINT_DEFAULT_MTIME,
+ XIANGSHAN_KMH_CLINT_TIMEBASE_FREQ, true);
+
+ /* ROM */
+ memory_region_init_rom(&s->rom, OBJECT(dev), "xiangshan.kunminghu.rom",
+ memmap[XIANGSHAN_KMH_ROM].size, &error_fatal);
+ memory_region_add_subregion(system_memory,
+ memmap[XIANGSHAN_KMH_ROM].base, &s->rom);
+}
+
+static void xiangshan_kmh_soc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = xiangshan_kmh_soc_realize;
+ dc->user_creatable = false;
+}
+
+static void xiangshan_kmh_soc_instance_init(Object *obj)
+{
+ XiangshanKmhSoCState *s = XIANGSHAN_KMH_SOC(obj);
+
+ object_initialize_child(obj, "cpus", &s->cpus, TYPE_RISCV_HART_ARRAY);
+}
+
+static const TypeInfo xiangshan_kmh_soc_info = {
+ .name = TYPE_XIANGSHAN_KMH_SOC,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(XiangshanKmhSoCState),
+ .instance_init = xiangshan_kmh_soc_instance_init,
+ .class_init = xiangshan_kmh_soc_class_init,
+};
+
+static void xiangshan_kmh_soc_register_types(void)
+{
+ type_register_static(&xiangshan_kmh_soc_info);
+}
+type_init(xiangshan_kmh_soc_register_types)
+
+static void xiangshan_kmh_machine_init(MachineState *machine)
+{
+ XiangshanKmhState *s = XIANGSHAN_KMH_MACHINE(machine);
+ const MemMapEntry *memmap = xiangshan_kmh_memmap;
+ MemoryRegion *system_memory = get_system_memory();
+ hwaddr start_addr = memmap[XIANGSHAN_KMH_DRAM].base;
+
+ /* Initialize SoC */
+ object_initialize_child(OBJECT(machine), "soc", &s->soc,
+ TYPE_XIANGSHAN_KMH_SOC);
+ qdev_realize(DEVICE(&s->soc), NULL, &error_fatal);
+
+ /* Register RAM */
+ memory_region_add_subregion(system_memory,
+ memmap[XIANGSHAN_KMH_DRAM].base,
+ machine->ram);
+
+ /* ROM reset vector */
+ riscv_setup_rom_reset_vec(machine, &s->soc.cpus,
+ start_addr,
+ memmap[XIANGSHAN_KMH_ROM].base,
+ memmap[XIANGSHAN_KMH_ROM].size, 0, 0);
+ if (machine->firmware) {
+ riscv_load_firmware(machine->firmware, &start_addr, NULL);
+ }
+
+ /* Note: dtb has been integrated into firmware(OpenSBI) when compiling */
+}
+
+static void xiangshan_kmh_machine_class_init(ObjectClass *klass, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(klass);
+ static const char *const valid_cpu_types[] = {
+ TYPE_RISCV_CPU_XIANGSHAN_KMH,
+ NULL
+ };
+
+ mc->desc = "RISC-V Board compatible with Xiangshan Kunminghu SoC platform";
+ mc->init = xiangshan_kmh_machine_init;
+ mc->max_cpus = XIANGSHAN_KMH_MAX_CPUS;
+ mc->default_cpu_type = TYPE_RISCV_CPU_XIANGSHAN_KMH;
+ mc->valid_cpu_types = valid_cpu_types;
+ mc->default_ram_id = "xiangshan.kunminghu.ram";
+}
+
+static const TypeInfo xiangshan_kmh_machine_info = {
+ .name = TYPE_XIANGSHAN_KMH_MACHINE,
+ .parent = TYPE_MACHINE,
+ .instance_size = sizeof(XiangshanKmhState),
+ .class_init = xiangshan_kmh_machine_class_init,
+};
+
+static void xiangshan_kmh_machine_register_types(void)
+{
+ type_register_static(&xiangshan_kmh_machine_info);
+}
+type_init(xiangshan_kmh_machine_register_types)
diff --git a/include/hw/riscv/xiangshan_kmh.h b/include/hw/riscv/xiangshan_kmh.h
new file mode 100644
index 0000000000..41ce1eb69e
--- /dev/null
+++ b/include/hw/riscv/xiangshan_kmh.h
@@ -0,0 +1,77 @@
+/*
+ * Xiangshan Kunminghu SoC emulation
+ *
+ * Copyright (c) 2025 Beijing Institute of Open Source Chip (BOSC)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HW_XIANGSHAN_KMH_H
+#define HW_XIANGSHAN_KMH_H
+
+#include "hw/boards.h"
+#include "hw/riscv/riscv_hart.h"
+
+#define XIANGSHAN_KMH_MAX_CPUS 16
+
+typedef struct XiangshanKmhSoCState {
+ /*< private >*/
+ DeviceState parent_obj;
+
+ /*< public >*/
+ RISCVHartArrayState cpus;
+ DeviceState *irqchip;
+ MemoryRegion rom;
+} XiangshanKmhSoCState;
+
+#define TYPE_XIANGSHAN_KMH_SOC "xiangshan.kunminghu.soc"
+DECLARE_INSTANCE_CHECKER(XiangshanKmhSoCState, XIANGSHAN_KMH_SOC,
+ TYPE_XIANGSHAN_KMH_SOC)
+
+typedef struct XiangshanKmhState {
+ /*< private >*/
+ MachineState parent_obj;
+
+ /*< public >*/
+ XiangshanKmhSoCState soc;
+} XiangshanKmhState;
+
+#define TYPE_XIANGSHAN_KMH_MACHINE MACHINE_TYPE_NAME("xiangshan-kunminghu")
+DECLARE_INSTANCE_CHECKER(XiangshanKmhState, XIANGSHAN_KMH_MACHINE,
+ TYPE_XIANGSHAN_KMH_MACHINE)
+
+enum {
+ XIANGSHAN_KMH_ROM,
+ XIANGSHAN_KMH_UART0,
+ XIANGSHAN_KMH_CLINT,
+ XIANGSHAN_KMH_APLIC_M,
+ XIANGSHAN_KMH_APLIC_S,
+ XIANGSHAN_KMH_IMSIC_M,
+ XIANGSHAN_KMH_IMSIC_S,
+ XIANGSHAN_KMH_DRAM,
+};
+
+enum {
+ XIANGSHAN_KMH_UART0_IRQ = 10,
+};
+
+/* Indicating Timebase-freq (1MHZ) */
+#define XIANGSHAN_KMH_CLINT_TIMEBASE_FREQ 1000000
+
+#define XIANGSHAN_KMH_IMSIC_NUM_IDS 255
+#define XIANGSHAN_KMH_IMSIC_NUM_GUESTS 7
+#define XIANGSHAN_KMH_IMSIC_GUEST_BITS 3
+
+#define XIANGSHAN_KMH_APLIC_NUM_SOURCES 96
+
+#endif
--
2.34.1
