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qemu/hw/mips/loongson3_virt.c
Paolo Bonzini b98948a902 hw/mips/loongson3_virt: do not require CONFIG_USB 
Once the Kconfig for hw/mips is cleaned up, it will be possible to build a
binary that does not include any USB host controller and therefore that
does not include the code guarded by CONFIG_USB.  While the simpler
creation functions such as usb_create_simple can be inlined, this is not
true of usb_bus_find().  Remove it, replacing it with a search of the
single USB bus created by loongson3_virt_devices_init().

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20240223124406.234509-5-pbonzini@redhat.com>
[PMD: Fixed style]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-27 09:37:11 +01:00

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/*
* Generic Loongson-3 Platform support
*
* Copyright (c) 2018-2020 Huacai Chen (chenhc@lemote.com)
* Copyright (c) 2018-2020 Jiaxun Yang <jiaxun.yang@flygoat.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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 <https://www.gnu.org/licenses/>.
*/
/*
* Generic virtualized PC Platform based on Loongson-3 CPU (MIPS64R2 with
* extensions, 800~2000MHz)
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/cutils.h"
#include "qemu/datadir.h"
#include "qapi/error.h"
#include "elf.h"
#include "hw/char/serial.h"
#include "hw/intc/loongson_liointc.h"
#include "hw/mips/mips.h"
#include "hw/mips/fw_cfg.h"
#include "hw/mips/loongson3_bootp.h"
#include "hw/misc/unimp.h"
#include "hw/intc/i8259.h"
#include "hw/loader.h"
#include "hw/isa/superio.h"
#include "hw/pci/msi.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_host.h"
#include "hw/pci-host/gpex.h"
#include "hw/usb.h"
#include "net/net.h"
#include "sysemu/kvm.h"
#include "sysemu/qtest.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "qemu/error-report.h"
#define PM_CNTL_MODE 0x10
#define LOONGSON_MAX_VCPUS 16
/*
* Loongson-3's virtual machine BIOS can be obtained here:
* 1, https://github.com/loongson-community/firmware-nonfree
* 2, http://dev.lemote.com:8000/files/firmware/UEFI/KVM/bios_loongson3.bin
*/
#define LOONGSON3_BIOSNAME "bios_loongson3.bin"
#define UART_IRQ 0
#define RTC_IRQ 1
#define PCIE_IRQ_BASE 2
const MemMapEntry virt_memmap[] = {
[VIRT_LOWMEM] = { 0x00000000, 0x10000000 },
[VIRT_PM] = { 0x10080000, 0x100 },
[VIRT_FW_CFG] = { 0x10080100, 0x100 },
[VIRT_RTC] = { 0x10081000, 0x1000 },
[VIRT_PCIE_PIO] = { 0x18000000, 0x80000 },
[VIRT_PCIE_ECAM] = { 0x1a000000, 0x2000000 },
[VIRT_BIOS_ROM] = { 0x1fc00000, 0x200000 },
[VIRT_UART] = { 0x1fe001e0, 0x8 },
[VIRT_LIOINTC] = { 0x3ff01400, 0x64 },
[VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 },
[VIRT_HIGHMEM] = { 0x80000000, 0x0 }, /* Variable */
};
static const MemMapEntry loader_memmap[] = {
[LOADER_KERNEL] = { 0x00000000, 0x4000000 },
[LOADER_INITRD] = { 0x04000000, 0x0 }, /* Variable */
[LOADER_CMDLINE] = { 0x0ff00000, 0x100000 },
};
static const MemMapEntry loader_rommap[] = {
[LOADER_BOOTROM] = { 0x1fc00000, 0x1000 },
[LOADER_PARAM] = { 0x1fc01000, 0x10000 },
};
struct LoongsonMachineState {
MachineState parent_obj;
MemoryRegion *pio_alias;
MemoryRegion *mmio_alias;
MemoryRegion *ecam_alias;
};
typedef struct LoongsonMachineState LoongsonMachineState;
#define TYPE_LOONGSON_MACHINE MACHINE_TYPE_NAME("loongson3-virt")
DECLARE_INSTANCE_CHECKER(LoongsonMachineState, LOONGSON_MACHINE, TYPE_LOONGSON_MACHINE)
static struct _loaderparams {
uint64_t cpu_freq;
uint64_t ram_size;
const char *kernel_cmdline;
const char *kernel_filename;
const char *initrd_filename;
uint64_t kernel_entry;
uint64_t a0, a1, a2;
} loaderparams;
static uint64_t loongson3_pm_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void loongson3_pm_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
if (addr != PM_CNTL_MODE) {
return;
}
switch (val) {
case 0x00:
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
case 0xff:
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
return;
default:
return;
}
}
static const MemoryRegionOps loongson3_pm_ops = {
.read = loongson3_pm_read,
.write = loongson3_pm_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1
}
};
#define DEF_LOONGSON3_FREQ (800 * 1000 * 1000)
static uint64_t get_cpu_freq_hz(void)
{
#ifdef CONFIG_KVM
int ret;
uint64_t freq;
struct kvm_one_reg freq_reg = {
.id = KVM_REG_MIPS_COUNT_HZ,
.addr = (uintptr_t)(&freq)
};
if (kvm_enabled()) {
ret = kvm_vcpu_ioctl(first_cpu, KVM_GET_ONE_REG, &freq_reg);
if (ret >= 0) {
return freq * 2;
}
}
#endif
return DEF_LOONGSON3_FREQ;
}
static void init_boot_param(void)
{
static void *p;
struct boot_params *bp;
p = g_malloc0(loader_rommap[LOADER_PARAM].size);
bp = p;
bp->efi.smbios.vers = cpu_to_le16(1);
init_reset_system(&(bp->reset_system));
p += ROUND_UP(sizeof(struct boot_params), 64);
init_loongson_params(&(bp->efi.smbios.lp), p,
loaderparams.cpu_freq, loaderparams.ram_size);
rom_add_blob_fixed("params_rom", bp,
loader_rommap[LOADER_PARAM].size,
loader_rommap[LOADER_PARAM].base);
g_free(bp);
loaderparams.a2 = cpu_mips_phys_to_kseg0(NULL,
loader_rommap[LOADER_PARAM].base);
}
static void init_boot_rom(void)
{
const unsigned int boot_code[] = {
0x40086000, /* mfc0 t0, CP0_STATUS */
0x240900E4, /* li t1, 0xe4 #set kx, sx, ux, erl */
0x01094025, /* or t0, t0, t1 */
0x3C090040, /* lui t1, 0x40 #set bev */
0x01094025, /* or t0, t0, t1 */
0x40886000, /* mtc0 t0, CP0_STATUS */
0x00000000,
0x40806800, /* mtc0 zero, CP0_CAUSE */
0x00000000,
0x400A7801, /* mfc0 t2, $15, 1 */
0x314A00FF, /* andi t2, 0x0ff */
0x3C089000, /* dli t0, 0x900000003ff01000 */
0x00084438,
0x35083FF0,
0x00084438,
0x35081000,
0x314B0003, /* andi t3, t2, 0x3 #local cpuid */
0x000B5A00, /* sll t3, 8 */
0x010B4025, /* or t0, t0, t3 */
0x314C000C, /* andi t4, t2, 0xc #node id */
0x000C62BC, /* dsll t4, 42 */
0x010C4025, /* or t0, t0, t4 */
/* WaitForInit: */
0xDD020020, /* ld v0, FN_OFF(t0) #FN_OFF 0x020 */
0x1040FFFE, /* beqz v0, WaitForInit */
0x00000000, /* nop */
0xDD1D0028, /* ld sp, SP_OFF(t0) #FN_OFF 0x028 */
0xDD1C0030, /* ld gp, GP_OFF(t0) #FN_OFF 0x030 */
0xDD050038, /* ld a1, A1_OFF(t0) #FN_OFF 0x038 */
0x00400008, /* jr v0 #byebye */
0x00000000, /* nop */
0x1000FFFF, /* 1: b 1b */
0x00000000, /* nop */
/* Reset */
0x3C0C9000, /* dli t0, 0x9000000010080010 */
0x358C0000,
0x000C6438,
0x358C1008,
0x000C6438,
0x358C0010,
0x240D0000, /* li t1, 0x00 */
0xA18D0000, /* sb t1, (t0) */
0x1000FFFF, /* 1: b 1b */
0x00000000, /* nop */
/* Shutdown */
0x3C0C9000, /* dli t0, 0x9000000010080010 */
0x358C0000,
0x000C6438,
0x358C1008,
0x000C6438,
0x358C0010,
0x240D00FF, /* li t1, 0xff */
0xA18D0000, /* sb t1, (t0) */
0x1000FFFF, /* 1: b 1b */
0x00000000 /* nop */
};
rom_add_blob_fixed("boot_rom", boot_code, sizeof(boot_code),
loader_rommap[LOADER_BOOTROM].base);
}
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static void fw_conf_init(unsigned long ram_size)
{
FWCfgState *fw_cfg;
hwaddr cfg_addr = virt_memmap[VIRT_FW_CFG].base;
fw_cfg = fw_cfg_init_mem_wide(cfg_addr, cfg_addr + 8, 8, 0, NULL);
fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)current_machine->smp.cpus);
fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)current_machine->smp.max_cpus);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
fw_cfg_add_i32(fw_cfg, FW_CFG_MACHINE_VERSION, 1);
fw_cfg_add_i64(fw_cfg, FW_CFG_CPU_FREQ, get_cpu_freq_hz());
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
}
static int set_prom_cmdline(ram_addr_t initrd_offset, long initrd_size)
{
int ret = 0;
void *cmdline_buf;
hwaddr cmdline_vaddr;
unsigned int *parg_env;
/* Allocate cmdline_buf for command line. */
cmdline_buf = g_malloc0(loader_memmap[LOADER_CMDLINE].size);
cmdline_vaddr = cpu_mips_phys_to_kseg0(NULL,
loader_memmap[LOADER_CMDLINE].base);
/*
* Layout of cmdline_buf looks like this:
* argv[0], argv[1], 0, env[0], env[1], ... env[i], 0,
* argv[0]'s data, argv[1]'s data, env[0]'data, ..., env[i]'s data, 0
*/
parg_env = (void *)cmdline_buf;
ret = (3 + 1) * 4;
*parg_env++ = cmdline_vaddr + ret;
ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "g"));
/* argv1 */
*parg_env++ = cmdline_vaddr + ret;
if (initrd_size > 0)
ret += (1 + snprintf(cmdline_buf + ret, 256 - ret,
"rd_start=0x" TARGET_FMT_lx " rd_size=%li %s",
cpu_mips_phys_to_kseg0(NULL, initrd_offset),
initrd_size, loaderparams.kernel_cmdline));
else
ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "%s",
loaderparams.kernel_cmdline));
/* argv2 */
*parg_env++ = cmdline_vaddr + 4 * ret;
rom_add_blob_fixed("cmdline", cmdline_buf,
loader_memmap[LOADER_CMDLINE].size,
loader_memmap[LOADER_CMDLINE].base);
g_free(cmdline_buf);
loaderparams.a0 = 2;
loaderparams.a1 = cmdline_vaddr;
return 0;
}
static uint64_t load_kernel(CPUMIPSState *env)
{
long kernel_size;
ram_addr_t initrd_offset;
uint64_t kernel_entry, kernel_low, kernel_high, initrd_size;
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry,
(uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
NULL, 0, EM_MIPS, 1, 0);
if (kernel_size < 0) {
error_report("could not load kernel '%s': %s",
loaderparams.kernel_filename,
load_elf_strerror(kernel_size));
exit(1);
}
/* load initrd */
initrd_size = 0;
initrd_offset = 0;
if (loaderparams.initrd_filename) {
initrd_size = get_image_size(loaderparams.initrd_filename);
if (initrd_size > 0) {
initrd_offset = MAX(loader_memmap[LOADER_INITRD].base,
ROUND_UP(kernel_high, INITRD_PAGE_SIZE));
if (initrd_offset + initrd_size > loaderparams.ram_size) {
error_report("memory too small for initial ram disk '%s'",
loaderparams.initrd_filename);
exit(1);
}
initrd_size = load_image_targphys(loaderparams.initrd_filename,
initrd_offset,
loaderparams.ram_size - initrd_offset);
}
if (initrd_size == (target_ulong) -1) {
error_report("could not load initial ram disk '%s'",
loaderparams.initrd_filename);
exit(1);
}
}
/* Setup prom cmdline. */
set_prom_cmdline(initrd_offset, initrd_size);
return kernel_entry;
}
static void main_cpu_reset(void *opaque)
{
MIPSCPU *cpu = opaque;
CPUMIPSState *env = &cpu->env;
cpu_reset(CPU(cpu));
/* Loongson-3 reset stuff */
if (loaderparams.kernel_filename) {
if (cpu == MIPS_CPU(first_cpu)) {
env->active_tc.gpr[4] = loaderparams.a0;
env->active_tc.gpr[5] = loaderparams.a1;
env->active_tc.gpr[6] = loaderparams.a2;
env->active_tc.PC = loaderparams.kernel_entry;
}
env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
}
}
static inline void loongson3_virt_devices_init(MachineState *machine,
DeviceState *pic)
{
int i;
qemu_irq irq;
PCIBus *pci_bus;
DeviceState *dev;
MemoryRegion *mmio_reg, *ecam_reg;
MachineClass *mc = MACHINE_GET_CLASS(machine);
LoongsonMachineState *s = LOONGSON_MACHINE(machine);
dev = qdev_new(TYPE_GPEX_HOST);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
pci_bus = PCI_HOST_BRIDGE(dev)->bus;
s->ecam_alias = g_new0(MemoryRegion, 1);
ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
memory_region_init_alias(s->ecam_alias, OBJECT(dev), "pcie-ecam",
ecam_reg, 0, virt_memmap[VIRT_PCIE_ECAM].size);
memory_region_add_subregion(get_system_memory(),
virt_memmap[VIRT_PCIE_ECAM].base,
s->ecam_alias);
s->mmio_alias = g_new0(MemoryRegion, 1);
mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1);
memory_region_init_alias(s->mmio_alias, OBJECT(dev), "pcie-mmio",
mmio_reg, virt_memmap[VIRT_PCIE_MMIO].base,
virt_memmap[VIRT_PCIE_MMIO].size);
memory_region_add_subregion(get_system_memory(),
virt_memmap[VIRT_PCIE_MMIO].base,
s->mmio_alias);
s->pio_alias = g_new0(MemoryRegion, 1);
memory_region_init_alias(s->pio_alias, OBJECT(dev), "pcie-pio",
get_system_io(), 0,
virt_memmap[VIRT_PCIE_PIO].size);
memory_region_add_subregion(get_system_memory(),
virt_memmap[VIRT_PCIE_PIO].base, s->pio_alias);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, virt_memmap[VIRT_PCIE_PIO].base);
for (i = 0; i < GPEX_NUM_IRQS; i++) {
irq = qdev_get_gpio_in(pic, PCIE_IRQ_BASE + i);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, irq);
gpex_set_irq_num(GPEX_HOST(dev), i, PCIE_IRQ_BASE + i);
}
msi_nonbroken = true;
pci_vga_init(pci_bus);
if (defaults_enabled() && object_class_by_name("pci-ohci")) {
USBBus *usb_bus;
pci_create_simple(pci_bus, -1, "pci-ohci");
usb_bus = USB_BUS(object_resolve_type_unambiguous(TYPE_USB_BUS,
&error_abort));
usb_create_simple(usb_bus, "usb-kbd");
usb_create_simple(usb_bus, "usb-tablet");
}
pci_init_nic_devices(pci_bus, mc->default_nic);
}
static void mips_loongson3_virt_init(MachineState *machine)
{
int i;
long bios_size;
MIPSCPU *cpu;
Clock *cpuclk;
CPUMIPSState *env;
DeviceState *liointc;
char *filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *kernel_filename = machine->kernel_filename;
const char *initrd_filename = machine->initrd_filename;
ram_addr_t ram_size = machine->ram_size;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *bios = g_new(MemoryRegion, 1);
MemoryRegion *iomem = g_new(MemoryRegion, 1);
/* TODO: TCG will support all CPU types */
if (!kvm_enabled()) {
if (!machine->cpu_type) {
machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A1000");
}
if (!cpu_type_supports_isa(machine->cpu_type, INSN_LOONGSON3A)) {
error_report("Loongson-3/TCG needs a Loongson-3 series cpu");
exit(1);
}
} else {
if (!machine->cpu_type) {
machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A4000");
}
if (!strstr(machine->cpu_type, "Loongson-3A4000")) {
error_report("Loongson-3/KVM needs cpu type Loongson-3A4000");
exit(1);
}
}
if (ram_size < 512 * MiB) {
error_report("Loongson-3 machine needs at least 512MB memory");
exit(1);
}
/*
* The whole MMIO range among configure registers doesn't generate
* exception when accessing invalid memory. Create some unimplememted
* devices to emulate this feature.
*/
create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB);
create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB);
liointc = qdev_new("loongson.liointc");
sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal);
sysbus_mmio_map(SYS_BUS_DEVICE(liointc), 0, virt_memmap[VIRT_LIOINTC].base);
serial_mm_init(address_space_mem, virt_memmap[VIRT_UART].base, 0,
qdev_get_gpio_in(liointc, UART_IRQ), 115200, serial_hd(0),
DEVICE_NATIVE_ENDIAN);
sysbus_create_simple("goldfish_rtc", virt_memmap[VIRT_RTC].base,
qdev_get_gpio_in(liointc, RTC_IRQ));
cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ);
for (i = 0; i < machine->smp.cpus; i++) {
int ip;
/* init CPUs */
cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
/* Init internal devices */
cpu_mips_irq_init_cpu(cpu);
cpu_mips_clock_init(cpu);
qemu_register_reset(main_cpu_reset, cpu);
if (i >= 4) {
continue; /* Only node-0 can be connected to LIOINTC */
}
for (ip = 0; ip < 4 ; ip++) {
int pin = i * 4 + ip;
sysbus_connect_irq(SYS_BUS_DEVICE(liointc),
pin, cpu->env.irq[ip + 2]);
}
}
env = &MIPS_CPU(first_cpu)->env;
/* Allocate RAM/BIOS, 0x00000000~0x10000000 is alias of 0x80000000~0x90000000 */
memory_region_init_rom(bios, NULL, "loongson3.bios",
virt_memmap[VIRT_BIOS_ROM].size, &error_fatal);
memory_region_init_alias(ram, NULL, "loongson3.lowmem",
machine->ram, 0, virt_memmap[VIRT_LOWMEM].size);
memory_region_init_io(iomem, NULL, &loongson3_pm_ops,
NULL, "loongson3_pm", virt_memmap[VIRT_PM].size);
memory_region_add_subregion(address_space_mem,
virt_memmap[VIRT_LOWMEM].base, ram);
memory_region_add_subregion(address_space_mem,
virt_memmap[VIRT_BIOS_ROM].base, bios);
memory_region_add_subregion(address_space_mem,
virt_memmap[VIRT_HIGHMEM].base, machine->ram);
memory_region_add_subregion(address_space_mem,
virt_memmap[VIRT_PM].base, iomem);
/*
* We do not support flash operation, just loading bios.bin as raw BIOS.
* Please use -L to set the BIOS path and -bios to set bios name.
*/
if (kernel_filename) {
loaderparams.cpu_freq = get_cpu_freq_hz();
loaderparams.ram_size = ram_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
loaderparams.kernel_entry = load_kernel(env);
init_boot_rom();
init_boot_param();
} else {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
machine->firmware ?: LOONGSON3_BIOSNAME);
if (filename) {
bios_size = load_image_targphys(filename,
virt_memmap[VIRT_BIOS_ROM].base,
virt_memmap[VIRT_BIOS_ROM].size);
g_free(filename);
} else {
bios_size = -1;
}
if ((bios_size < 0 || bios_size > virt_memmap[VIRT_BIOS_ROM].size) &&
!kernel_filename && !qtest_enabled()) {
error_report("Could not load MIPS bios '%s'", machine->firmware);
exit(1);
}
fw_conf_init(ram_size);
}
loongson3_virt_devices_init(machine, liointc);
}
static void loongson3v_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Loongson-3 Virtualization Platform";
mc->init = mips_loongson3_virt_init;
mc->block_default_type = IF_IDE;
mc->max_cpus = LOONGSON_MAX_VCPUS;
mc->default_ram_id = "loongson3.highram";
mc->default_ram_size = 1600 * MiB;
mc->minimum_page_bits = 14;
mc->default_nic = "virtio-net-pci";
}
static const TypeInfo loongson3_machine_types[] = {
{
.name = TYPE_LOONGSON_MACHINE,
.parent = TYPE_MACHINE,
.instance_size = sizeof(LoongsonMachineState),
.class_init = loongson3v_machine_class_init,
}
};
DEFINE_TYPES(loongson3_machine_types)
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