static void pc_init1(MachineState *machine)

{

    PCMachineState *pc_machine = PC_MACHINE(machine);

    MemoryRegion *system_memory = get_system_memory();

    MemoryRegion *system_io = get_system_io();

    int i;

    ram_addr_t below_4g_mem_size, above_4g_mem_size;

    PCIBus *pci_bus;

    ISABus *isa_bus;

    PCII440FXState *i440fx_state;

    int piix3_devfn = -1;

    qemu_irq *cpu_irq;

    qemu_irq *gsi;

    qemu_irq *i8259;

    qemu_irq *smi_irq;

    GSIState *gsi_state;

    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];

    BusState *idebus[MAX_IDE_BUS];

    ISADevice *rtc_state;

    ISADevice *floppy;

    MemoryRegion *ram_memory;

    MemoryRegion *pci_memory;

    MemoryRegion *rom_memory;

    DeviceState *icc_bridge;

    FWCfgState *fw_cfg = NULL;

    PcGuestInfo *guest_info;

    ram_addr_t lowmem;



    /* Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory).

     * If it doesn't, we need to split it in chunks below and above 4G.

     * In any case, try to make sure that guest addresses aligned at

     * 1G boundaries get mapped to host addresses aligned at 1G boundaries.

     * For old machine types, use whatever split we used historically to avoid

     * breaking migration.

     */

    if (machine->ram_size >= 0xe0000000) {

        lowmem = gigabyte_align ? 0xc0000000 : 0xe0000000;

    } else {

        lowmem = 0xe0000000;

    }



    /* Handle the machine opt max-ram-below-4g.  It is basically doing

     * min(qemu limit, user limit).

     */

    if (lowmem > pc_machine->max_ram_below_4g) {

        lowmem = pc_machine->max_ram_below_4g;

        if (machine->ram_size - lowmem > lowmem &&

            lowmem & ((1ULL << 30) - 1)) {

            error_report("Warning: Large machine and max_ram_below_4g(%"PRIu64

                         ") not a multiple of 1G; possible bad performance.",

                         pc_machine->max_ram_below_4g);

        }

    }



    if (machine->ram_size >= lowmem) {

        above_4g_mem_size = machine->ram_size - lowmem;

        below_4g_mem_size = lowmem;

    } else {

        above_4g_mem_size = 0;

        below_4g_mem_size = machine->ram_size;

    }



    if (xen_enabled() && xen_hvm_init(&below_4g_mem_size, &above_4g_mem_size,

                                      &ram_memory) != 0) {

        fprintf(stderr, "xen hardware virtual machine initialisation failed\n");

        exit(1);

    }



    icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);

    object_property_add_child(qdev_get_machine(), "icc-bridge",

                              OBJECT(icc_bridge), NULL);



    pc_cpus_init(machine->cpu_model, icc_bridge);



    if (kvm_enabled() && kvmclock_enabled) {

        kvmclock_create();

    }



    if (pci_enabled) {

        pci_memory = g_new(MemoryRegion, 1);

        memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);

        rom_memory = pci_memory;

    } else {

        pci_memory = NULL;

        rom_memory = system_memory;

    }



    guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);



    guest_info->has_acpi_build = has_acpi_build;

    guest_info->legacy_acpi_table_size = legacy_acpi_table_size;



    guest_info->isapc_ram_fw = !pci_enabled;

    guest_info->has_reserved_memory = has_reserved_memory;

    guest_info->rsdp_in_ram = rsdp_in_ram;



    if (smbios_defaults) {

        MachineClass *mc = MACHINE_GET_CLASS(machine);

        /* These values are guest ABI, do not change */

        smbios_set_defaults("QEMU", "Standard PC (i440FX + PIIX, 1996)",

                            mc->name, smbios_legacy_mode, smbios_uuid_encoded);

    }



    /* allocate ram and load rom/bios */

    if (!xen_enabled()) {

        fw_cfg = pc_memory_init(machine, system_memory,

                                below_4g_mem_size, above_4g_mem_size,

                                rom_memory, &ram_memory, guest_info);

    } else if (machine->kernel_filename != NULL) {

        /* For xen HVM direct kernel boot, load linux here */

        fw_cfg = xen_load_linux(machine->kernel_filename,

                                machine->kernel_cmdline,

                                machine->initrd_filename,

                                below_4g_mem_size,

                                guest_info);

    }



    gsi_state = g_malloc0(sizeof(*gsi_state));

    if (kvm_irqchip_in_kernel()) {

        kvm_pc_setup_irq_routing(pci_enabled);

        gsi = qemu_allocate_irqs(kvm_pc_gsi_handler, gsi_state,

                                 GSI_NUM_PINS);

    } else {

        gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);

    }



    if (pci_enabled) {

        pci_bus = i440fx_init(&i440fx_state, &piix3_devfn, &isa_bus, gsi,

                              system_memory, system_io, machine->ram_size,

                              below_4g_mem_size,

                              above_4g_mem_size,

                              pci_memory, ram_memory);

    } else {

        pci_bus = NULL;

        i440fx_state = NULL;

        isa_bus = isa_bus_new(NULL, get_system_memory(), system_io);

        no_hpet = 1;

    }

    isa_bus_irqs(isa_bus, gsi);



    if (kvm_irqchip_in_kernel()) {

        i8259 = kvm_i8259_init(isa_bus);

    } else if (xen_enabled()) {

        i8259 = xen_interrupt_controller_init();

    } else {

        cpu_irq = pc_allocate_cpu_irq();

        i8259 = i8259_init(isa_bus, cpu_irq[0]);

    }



    for (i = 0; i < ISA_NUM_IRQS; i++) {

        gsi_state->i8259_irq[i] = i8259[i];

    }

    if (pci_enabled) {

        ioapic_init_gsi(gsi_state, "i440fx");

    }

    qdev_init_nofail(icc_bridge);



    pc_register_ferr_irq(gsi[13]);



    pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);



    assert(pc_machine->vmport != ON_OFF_AUTO_MAX);

    if (pc_machine->vmport == ON_OFF_AUTO_AUTO) {

        pc_machine->vmport = xen_enabled() ? ON_OFF_AUTO_OFF : ON_OFF_AUTO_ON;

    }



    /* init basic PC hardware */

    pc_basic_device_init(isa_bus, gsi, &rtc_state, true, &floppy,

                         (pc_machine->vmport != ON_OFF_AUTO_ON), 0x4);



    pc_nic_init(isa_bus, pci_bus);



    ide_drive_get(hd, ARRAY_SIZE(hd));

    if (pci_enabled) {

        PCIDevice *dev;

        if (xen_enabled()) {

            dev = pci_piix3_xen_ide_init(pci_bus, hd, piix3_devfn + 1);

        } else {

            dev = pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1);

        }

        idebus[0] = qdev_get_child_bus(&dev->qdev, "ide.0");

        idebus[1] = qdev_get_child_bus(&dev->qdev, "ide.1");

    } else {

        for(i = 0; i < MAX_IDE_BUS; i++) {

            ISADevice *dev;

            char busname[] = "ide.0";

            dev = isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i],

                               ide_irq[i],

                               hd[MAX_IDE_DEVS * i], hd[MAX_IDE_DEVS * i + 1]);

            /*

             * The ide bus name is ide.0 for the first bus and ide.1 for the

             * second one.

             */

            busname[4] = '0' + i;

            idebus[i] = qdev_get_child_bus(DEVICE(dev), busname);

        }

    }



    pc_cmos_init(below_4g_mem_size, above_4g_mem_size, machine->boot_order,

                 machine, floppy, idebus[0], idebus[1], rtc_state);



    if (pci_enabled && usb_enabled()) {

        pci_create_simple(pci_bus, piix3_devfn + 2, "piix3-usb-uhci");

    }



    if (pci_enabled && acpi_enabled) {

        DeviceState *piix4_pm;

        I2CBus *smbus;



        smi_irq = qemu_allocate_irqs(pc_acpi_smi_interrupt, first_cpu, 1);

        /* TODO: Populate SPD eeprom data.  */

        smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100,

                              gsi[9], *smi_irq,

                              kvm_enabled(), fw_cfg, &piix4_pm);

        smbus_eeprom_init(smbus, 8, NULL, 0);



        object_property_add_link(OBJECT(machine), PC_MACHINE_ACPI_DEVICE_PROP,

                                 TYPE_HOTPLUG_HANDLER,

                                 (Object **)&pc_machine->acpi_dev,

                                 object_property_allow_set_link,

                                 OBJ_PROP_LINK_UNREF_ON_RELEASE, &error_abort);

        object_property_set_link(OBJECT(machine), OBJECT(piix4_pm),

                                 PC_MACHINE_ACPI_DEVICE_PROP, &error_abort);

    }



    if (pci_enabled) {

        pc_pci_device_init(pci_bus);

    }

}
