Archipelago » qemu

/*

 * QEMU Sun4u/Sun4v System Emulator

 *

 * Copyright (c) 2005 Fabrice Bellard

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "hw.h"

#include "pci.h"

#include "apb_pci.h"

#include "pc.h"

#include "nvram.h"

#include "fdc.h"

#include "net.h"

#include "qemu-timer.h"

#include "sysemu.h"

#include "boards.h"

#include "firmware_abi.h"

#include "fw_cfg.h"

#include "sysbus.h"

#include "ide.h"

#include "loader.h"

#include "elf.h"

#include "blockdev.h"

//#define DEBUG_IRQ

//#define DEBUG_EBUS

//#define DEBUG_TIMER

#ifdef DEBUG_IRQ

#define CPUIRQ_DPRINTF(fmt, ...)                                \

    do { printf("CPUIRQ: " fmt , ## __VA_ARGS__); } while (0)

#else

#define CPUIRQ_DPRINTF(fmt, ...)

#endif

#ifdef DEBUG_EBUS

#define EBUS_DPRINTF(fmt, ...)                                  \

    do { printf("EBUS: " fmt , ## __VA_ARGS__); } while (0)

#else

#define EBUS_DPRINTF(fmt, ...)

#endif

#ifdef DEBUG_TIMER

#define TIMER_DPRINTF(fmt, ...)                                  \

    do { printf("TIMER: " fmt , ## __VA_ARGS__); } while (0)

#else

#define TIMER_DPRINTF(fmt, ...)

#endif

#define KERNEL_LOAD_ADDR     0x00404000

#define CMDLINE_ADDR         0x003ff000

#define INITRD_LOAD_ADDR     0x00300000

#define PROM_SIZE_MAX        (4 * 1024 * 1024)

#define PROM_VADDR           0x000ffd00000ULL

#define APB_SPECIAL_BASE     0x1fe00000000ULL

#define APB_MEM_BASE         0x1ff00000000ULL

#define APB_PCI_IO_BASE      (APB_SPECIAL_BASE + 0x02000000ULL)

#define PROM_FILENAME        "openbios-sparc64"

#define NVRAM_SIZE           0x2000

#define MAX_IDE_BUS          2

#define BIOS_CFG_IOPORT      0x510

#define FW_CFG_SPARC64_WIDTH (FW_CFG_ARCH_LOCAL + 0x00)

#define FW_CFG_SPARC64_HEIGHT (FW_CFG_ARCH_LOCAL + 0x01)

#define FW_CFG_SPARC64_DEPTH (FW_CFG_ARCH_LOCAL + 0x02)

#define MAX_PILS 16

#define TICK_MAX             0x7fffffffffffffffULL

struct hwdef {

    const char * const default_cpu_model;

    uint16_t machine_id;

    uint64_t prom_addr;

    uint64_t console_serial_base;

};

int DMA_get_channel_mode (int nchan)

{

    return 0;

}

int DMA_read_memory (int nchan, void *buf, int pos, int size)

{

    return 0;

}

int DMA_write_memory (int nchan, void *buf, int pos, int size)

{

    return 0;

}

void DMA_hold_DREQ (int nchan) {}

void DMA_release_DREQ (int nchan) {}

void DMA_schedule(int nchan) {}

void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit)

{

}

void DMA_register_channel (int nchan,

                           DMA_transfer_handler transfer_handler,

                           void *opaque)

{

}

static int fw_cfg_boot_set(void *opaque, const char *boot_device)

{

    fw_cfg_add_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);

    return 0;

}

static int sun4u_NVRAM_set_params(M48t59State *nvram, uint16_t NVRAM_size,

                                  const char *arch, ram_addr_t RAM_size,

                                  const char *boot_devices,

                                  uint32_t kernel_image, uint32_t kernel_size,

                                  const char *cmdline,

                                  uint32_t initrd_image, uint32_t initrd_size,

                                  uint32_t NVRAM_image,

                                  int width, int height, int depth,

                                  const uint8_t *macaddr)

{

    unsigned int i;

    uint32_t start, end;

    uint8_t image[0x1ff0];

    struct OpenBIOS_nvpart_v1 *part_header;

    memset(image, '\0', sizeof(image));

    start = 0;

    // OpenBIOS nvram variables

    // Variable partition

    part_header = (struct OpenBIOS_nvpart_v1 *)&image[start];

    part_header->signature = OPENBIOS_PART_SYSTEM;

    pstrcpy(part_header->name, sizeof(part_header->name), "system");

    end = start + sizeof(struct OpenBIOS_nvpart_v1);

    for (i = 0; i < nb_prom_envs; i++)

        end = OpenBIOS_set_var(image, end, prom_envs[i]);

    // End marker

    image[end++] = '\0';

    end = start + ((end - start + 15) & ~15);

    OpenBIOS_finish_partition(part_header, end - start);

    // free partition

    start = end;

    part_header = (struct OpenBIOS_nvpart_v1 *)&image[start];

    part_header->signature = OPENBIOS_PART_FREE;

    pstrcpy(part_header->name, sizeof(part_header->name), "free");

    end = 0x1fd0;

    OpenBIOS_finish_partition(part_header, end - start);

    Sun_init_header((struct Sun_nvram *)&image[0x1fd8], macaddr, 0x80);

    for (i = 0; i < sizeof(image); i++)

        m48t59_write(nvram, i, image[i]);

    return 0;

}

static unsigned long sun4u_load_kernel(const char *kernel_filename,

                                       const char *initrd_filename,

                                       ram_addr_t RAM_size, long *initrd_size)

{

    int linux_boot;

    unsigned int i;

    long kernel_size;

    uint8_t *ptr;

    linux_boot = (kernel_filename != NULL);

    kernel_size = 0;

    if (linux_boot) {

        int bswap_needed;

#ifdef BSWAP_NEEDED

        bswap_needed = 1;

#else

        bswap_needed = 0;

#endif

        kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,

                               NULL, NULL, 1, ELF_MACHINE, 0);

        if (kernel_size < 0)

            kernel_size = load_aout(kernel_filename, KERNEL_LOAD_ADDR,

                                    RAM_size - KERNEL_LOAD_ADDR, bswap_needed,

                                    TARGET_PAGE_SIZE);

        if (kernel_size < 0)

            kernel_size = load_image_targphys(kernel_filename,

                                              KERNEL_LOAD_ADDR,

                                              RAM_size - KERNEL_LOAD_ADDR);

        if (kernel_size < 0) {

            fprintf(stderr, "qemu: could not load kernel '%s'\n",

                    kernel_filename);

            exit(1);

        }

        /* load initrd */

        *initrd_size = 0;

        if (initrd_filename) {

            *initrd_size = load_image_targphys(initrd_filename,

                                               INITRD_LOAD_ADDR,

                                               RAM_size - INITRD_LOAD_ADDR);

            if (*initrd_size < 0) {

                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",

                        initrd_filename);

                exit(1);

            }

        }

        if (*initrd_size > 0) {

            for (i = 0; i < 64 * TARGET_PAGE_SIZE; i += TARGET_PAGE_SIZE) {

                ptr = rom_ptr(KERNEL_LOAD_ADDR + i);

                if (ldl_p(ptr + 8) == 0x48647253) { /* HdrS */

                    stl_p(ptr + 24, INITRD_LOAD_ADDR + KERNEL_LOAD_ADDR - 0x4000);

                    stl_p(ptr + 28, *initrd_size);

                    break;

                }

            }

        }

    }

    return kernel_size;

}

void pic_info(Monitor *mon)

{

}

void irq_info(Monitor *mon)

{

}

void cpu_check_irqs(CPUState *env)

{

    uint32_t pil = env->pil_in |

                  (env->softint & ~(SOFTINT_TIMER | SOFTINT_STIMER));

    /* check if TM or SM in SOFTINT are set

       setting these also causes interrupt 14 */

    if (env->softint & (SOFTINT_TIMER | SOFTINT_STIMER)) {

        pil |= 1 << 14;

    }

    if (!pil) {

        if (env->interrupt_request & CPU_INTERRUPT_HARD) {

            CPUIRQ_DPRINTF("Reset CPU IRQ (current interrupt %x)\n",

                           env->interrupt_index);

            env->interrupt_index = 0;

            cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);

        }

        return;

    }

    if (cpu_interrupts_enabled(env)) {

        unsigned int i;

        for (i = 15; i > env->psrpil; i--) {

            if (pil & (1 << i)) {

                int old_interrupt = env->interrupt_index;

                int new_interrupt = TT_EXTINT | i;

                if (env->tl > 0 && cpu_tsptr(env)->tt > new_interrupt) {

                    CPUIRQ_DPRINTF("Not setting CPU IRQ: TL=%d "

                                   "current %x >= pending %x\n",

                                   env->tl, cpu_tsptr(env)->tt, new_interrupt);

                } else if (old_interrupt != new_interrupt) {

                    env->interrupt_index = new_interrupt;

                    CPUIRQ_DPRINTF("Set CPU IRQ %d old=%x new=%x\n", i,

                                   old_interrupt, new_interrupt);

                    cpu_interrupt(env, CPU_INTERRUPT_HARD);

                }

                break;

            }

        }

    } else {

        CPUIRQ_DPRINTF("Interrupts disabled, pil=%08x pil_in=%08x softint=%08x "

                       "current interrupt %x\n",

                       pil, env->pil_in, env->softint, env->interrupt_index);

    }

}

static void cpu_kick_irq(CPUState *env)

{

    env->halted = 0;

    cpu_check_irqs(env);

    qemu_cpu_kick(env);

}

static void cpu_set_irq(void *opaque, int irq, int level)

{

    CPUState *env = opaque;

    if (level) {

        CPUIRQ_DPRINTF("Raise CPU IRQ %d\n", irq);

        env->pil_in |= 1 << irq;

        cpu_kick_irq(env);

    } else {

        CPUIRQ_DPRINTF("Lower CPU IRQ %d\n", irq);

        env->pil_in &= ~(1 << irq);

        cpu_check_irqs(env);

    }

}

typedef struct ResetData {

    CPUState *env;

    uint64_t prom_addr;

} ResetData;

void cpu_put_timer(QEMUFile *f, CPUTimer *s)

{

    qemu_put_be32s(f, &s->frequency);

    qemu_put_be32s(f, &s->disabled);

    qemu_put_be64s(f, &s->disabled_mask);

    qemu_put_sbe64s(f, &s->clock_offset);

    qemu_put_timer(f, s->qtimer);

}

void cpu_get_timer(QEMUFile *f, CPUTimer *s)

{

    qemu_get_be32s(f, &s->frequency);

    qemu_get_be32s(f, &s->disabled);

    qemu_get_be64s(f, &s->disabled_mask);

    qemu_get_sbe64s(f, &s->clock_offset);

    qemu_get_timer(f, s->qtimer);

}

static CPUTimer* cpu_timer_create(const char* name, CPUState *env,

                                  QEMUBHFunc *cb, uint32_t frequency,

                                  uint64_t disabled_mask)

{

    CPUTimer *timer = qemu_mallocz(sizeof (CPUTimer));

    timer->name = name;

    timer->frequency = frequency;

    timer->disabled_mask = disabled_mask;

    timer->disabled = 1;

    timer->clock_offset = qemu_get_clock(vm_clock);

    timer->qtimer = qemu_new_timer(vm_clock, cb, env);

    return timer;

}

static void cpu_timer_reset(CPUTimer *timer)

{

    timer->disabled = 1;

    timer->clock_offset = qemu_get_clock(vm_clock);

    qemu_del_timer(timer->qtimer);

}

static void main_cpu_reset(void *opaque)

{

    ResetData *s = (ResetData *)opaque;

    CPUState *env = s->env;

    static unsigned int nr_resets;

    cpu_reset(env);

    cpu_timer_reset(env->tick);

    cpu_timer_reset(env->stick);

    cpu_timer_reset(env->hstick);

    env->gregs[1] = 0; // Memory start

    env->gregs[2] = ram_size; // Memory size

    env->gregs[3] = 0; // Machine description XXX

    if (nr_resets++ == 0) {

        /* Power on reset */

        env->pc = s->prom_addr + 0x20ULL;

    } else {

        env->pc = s->prom_addr + 0x40ULL;

    }

    env->npc = env->pc + 4;

}

static void tick_irq(void *opaque)

{

    CPUState *env = opaque;

    CPUTimer* timer = env->tick;

    if (timer->disabled) {

        CPUIRQ_DPRINTF("tick_irq: softint disabled\n");

        return;

    } else {

        CPUIRQ_DPRINTF("tick: fire\n");

    }

    env->softint |= SOFTINT_TIMER;

    cpu_kick_irq(env);

}

static void stick_irq(void *opaque)

{

    CPUState *env = opaque;

    CPUTimer* timer = env->stick;

    if (timer->disabled) {

        CPUIRQ_DPRINTF("stick_irq: softint disabled\n");

        return;

    } else {

        CPUIRQ_DPRINTF("stick: fire\n");

    }

    env->softint |= SOFTINT_STIMER;

    cpu_kick_irq(env);

}

static void hstick_irq(void *opaque)

{

    CPUState *env = opaque;

    CPUTimer* timer = env->hstick;

    if (timer->disabled) {

        CPUIRQ_DPRINTF("hstick_irq: softint disabled\n");

        return;

    } else {

        CPUIRQ_DPRINTF("hstick: fire\n");

    }

    env->softint |= SOFTINT_STIMER;

    cpu_kick_irq(env);

}

static int64_t cpu_to_timer_ticks(int64_t cpu_ticks, uint32_t frequency)

{

    return muldiv64(cpu_ticks, get_ticks_per_sec(), frequency);

}

static uint64_t timer_to_cpu_ticks(int64_t timer_ticks, uint32_t frequency)

{

    return muldiv64(timer_ticks, frequency, get_ticks_per_sec());

}

void cpu_tick_set_count(CPUTimer *timer, uint64_t count)

{

    uint64_t real_count = count & ~timer->disabled_mask;

    uint64_t disabled_bit = count & timer->disabled_mask;

    int64_t vm_clock_offset = qemu_get_clock(vm_clock) -

                    cpu_to_timer_ticks(real_count, timer->frequency);

    TIMER_DPRINTF("%s set_count count=0x%016lx (%s) p=%p\n",

                  timer->name, real_count,

                  timer->disabled?"disabled":"enabled", timer);

    timer->disabled = disabled_bit ? 1 : 0;

    timer->clock_offset = vm_clock_offset;

}

uint64_t cpu_tick_get_count(CPUTimer *timer)

{

    uint64_t real_count = timer_to_cpu_ticks(

                    qemu_get_clock(vm_clock) - timer->clock_offset,

                    timer->frequency);

    TIMER_DPRINTF("%s get_count count=0x%016lx (%s) p=%p\n",

           timer->name, real_count,

           timer->disabled?"disabled":"enabled", timer);

    if (timer->disabled)

        real_count |= timer->disabled_mask;

    return real_count;

}

void cpu_tick_set_limit(CPUTimer *timer, uint64_t limit)

{

    int64_t now = qemu_get_clock(vm_clock);

    uint64_t real_limit = limit & ~timer->disabled_mask;

    timer->disabled = (limit & timer->disabled_mask) ? 1 : 0;

    int64_t expires = cpu_to_timer_ticks(real_limit, timer->frequency) +

                    timer->clock_offset;

    if (expires < now) {

        expires = now + 1;

    }

    TIMER_DPRINTF("%s set_limit limit=0x%016lx (%s) p=%p "

                  "called with limit=0x%016lx at 0x%016lx (delta=0x%016lx)\n",

                  timer->name, real_limit,

                  timer->disabled?"disabled":"enabled",

                  timer, limit,

                  timer_to_cpu_ticks(now - timer->clock_offset,

                                     timer->frequency),

                  timer_to_cpu_ticks(expires - now, timer->frequency));

    if (!real_limit) {

        TIMER_DPRINTF("%s set_limit limit=ZERO - not starting timer\n",

                timer->name);

        qemu_del_timer(timer->qtimer);

    } else if (timer->disabled) {

        qemu_del_timer(timer->qtimer);

    } else {

        qemu_mod_timer(timer->qtimer, expires);

    }

}

static void ebus_mmio_mapfunc(PCIDevice *pci_dev, int region_num,

                              pcibus_t addr, pcibus_t size, int type)

{

    EBUS_DPRINTF("Mapping region %d registers at %" FMT_PCIBUS "\n",

                 region_num, addr);

    switch (region_num) {

    case 0:

        isa_mmio_init(addr, 0x1000000);

        break;

    case 1:

        isa_mmio_init(addr, 0x800000);

        break;

    }

}

static void dummy_isa_irq_handler(void *opaque, int n, int level)

{

}

/* EBUS (Eight bit bus) bridge */

static void

pci_ebus_init(PCIBus *bus, int devfn)

{

    qemu_irq *isa_irq;

    pci_create_simple(bus, devfn, "ebus");

    isa_irq = qemu_allocate_irqs(dummy_isa_irq_handler, NULL, 16);

    isa_bus_irqs(isa_irq);

}

static int

pci_ebus_init1(PCIDevice *s)

{

    isa_bus_new(&s->qdev);

    pci_config_set_vendor_id(s->config, PCI_VENDOR_ID_SUN);

    pci_config_set_device_id(s->config, PCI_DEVICE_ID_SUN_EBUS);

    s->config[0x04] = 0x06; // command = bus master, pci mem

    s->config[0x05] = 0x00;

    s->config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error

    s->config[0x07] = 0x03; // status = medium devsel

    s->config[0x08] = 0x01; // revision

    s->config[0x09] = 0x00; // programming i/f

    pci_config_set_class(s->config, PCI_CLASS_BRIDGE_OTHER);

    s->config[0x0D] = 0x0a; // latency_timer

    pci_register_bar(s, 0, 0x1000000, PCI_BASE_ADDRESS_SPACE_MEMORY,

                           ebus_mmio_mapfunc);

    pci_register_bar(s, 1, 0x800000,  PCI_BASE_ADDRESS_SPACE_MEMORY,

                           ebus_mmio_mapfunc);

    return 0;

}

static PCIDeviceInfo ebus_info = {

    .qdev.name = "ebus",

    .qdev.size = sizeof(PCIDevice),

    .init = pci_ebus_init1,

};

static void pci_ebus_register(void)

{

    pci_qdev_register(&ebus_info);

}

device_init(pci_ebus_register);

static uint64_t translate_prom_address(void *opaque, uint64_t addr)

{

    target_phys_addr_t *base_addr = (target_phys_addr_t *)opaque;

    return addr + *base_addr - PROM_VADDR;

}

/* Boot PROM (OpenBIOS) */

static void prom_init(target_phys_addr_t addr, const char *bios_name)

{

    DeviceState *dev;

    SysBusDevice *s;

    char *filename;

    int ret;

    dev = qdev_create(NULL, "openprom");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    sysbus_mmio_map(s, 0, addr);

    /* load boot prom */

    if (bios_name == NULL) {

        bios_name = PROM_FILENAME;

    }

    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

    if (filename) {

        ret = load_elf(filename, translate_prom_address, &addr,

                       NULL, NULL, NULL, 1, ELF_MACHINE, 0);

        if (ret < 0 || ret > PROM_SIZE_MAX) {

            ret = load_image_targphys(filename, addr, PROM_SIZE_MAX);

        }

        qemu_free(filename);

    } else {

        ret = -1;

    }

    if (ret < 0 || ret > PROM_SIZE_MAX) {

        fprintf(stderr, "qemu: could not load prom '%s'\n", bios_name);

        exit(1);

    }

}

static int prom_init1(SysBusDevice *dev)

{

    ram_addr_t prom_offset;

    prom_offset = qemu_ram_alloc(NULL, "sun4u.prom", PROM_SIZE_MAX);

    sysbus_init_mmio(dev, PROM_SIZE_MAX, prom_offset | IO_MEM_ROM);

    return 0;

}

static SysBusDeviceInfo prom_info = {

    .init = prom_init1,

    .qdev.name  = "openprom",

    .qdev.size  = sizeof(SysBusDevice),

    .qdev.props = (Property[]) {

        {/* end of property list */}

    }

};

static void prom_register_devices(void)

{

    sysbus_register_withprop(&prom_info);

}

device_init(prom_register_devices);

typedef struct RamDevice

{

    SysBusDevice busdev;

    uint64_t size;

} RamDevice;

/* System RAM */

static int ram_init1(SysBusDevice *dev)

{

    ram_addr_t RAM_size, ram_offset;

    RamDevice *d = FROM_SYSBUS(RamDevice, dev);

    RAM_size = d->size;

    ram_offset = qemu_ram_alloc(NULL, "sun4u.ram", RAM_size);

    sysbus_init_mmio(dev, RAM_size, ram_offset);

    return 0;

}

static void ram_init(target_phys_addr_t addr, ram_addr_t RAM_size)

{

    DeviceState *dev;

    SysBusDevice *s;

    RamDevice *d;

    /* allocate RAM */

    dev = qdev_create(NULL, "memory");

    s = sysbus_from_qdev(dev);

    d = FROM_SYSBUS(RamDevice, s);

    d->size = RAM_size;

    qdev_init_nofail(dev);

    sysbus_mmio_map(s, 0, addr);

}

static SysBusDeviceInfo ram_info = {

    .init = ram_init1,

    .qdev.name  = "memory",

    .qdev.size  = sizeof(RamDevice),

    .qdev.props = (Property[]) {

        DEFINE_PROP_UINT64("size", RamDevice, size, 0),

        DEFINE_PROP_END_OF_LIST(),

    }

};

static void ram_register_devices(void)

{

    sysbus_register_withprop(&ram_info);

}

device_init(ram_register_devices);

static CPUState *cpu_devinit(const char *cpu_model, const struct hwdef *hwdef)

{

    CPUState *env;

    ResetData *reset_info;

    uint32_t   tick_frequency = 100*1000000;

    uint32_t  stick_frequency = 100*1000000;

    uint32_t hstick_frequency = 100*1000000;

    if (!cpu_model)

        cpu_model = hwdef->default_cpu_model;

    env = cpu_init(cpu_model);

    if (!env) {

        fprintf(stderr, "Unable to find Sparc CPU definition\n");

        exit(1);

    }

    env->tick = cpu_timer_create("tick", env, tick_irq,

                                  tick_frequency, TICK_NPT_MASK);

    env->stick = cpu_timer_create("stick", env, stick_irq,

                                   stick_frequency, TICK_INT_DIS);

    env->hstick = cpu_timer_create("hstick", env, hstick_irq,

                                    hstick_frequency, TICK_INT_DIS);

    reset_info = qemu_mallocz(sizeof(ResetData));

    reset_info->env = env;

    reset_info->prom_addr = hwdef->prom_addr;

    qemu_register_reset(main_cpu_reset, reset_info);

    return env;

}

static void sun4uv_init(ram_addr_t RAM_size,

                        const char *boot_devices,

                        const char *kernel_filename, const char *kernel_cmdline,

                        const char *initrd_filename, const char *cpu_model,

                        const struct hwdef *hwdef)

{

    CPUState *env;

    M48t59State *nvram;

    unsigned int i;

    long initrd_size, kernel_size;

    PCIBus *pci_bus, *pci_bus2, *pci_bus3;

    qemu_irq *irq;

    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];

    DriveInfo *fd[MAX_FD];

    void *fw_cfg;

    /* init CPUs */

    env = cpu_devinit(cpu_model, hwdef);

    /* set up devices */

    ram_init(0, RAM_size);

    prom_init(hwdef->prom_addr, bios_name);

    irq = qemu_allocate_irqs(cpu_set_irq, env, MAX_PILS);

    pci_bus = pci_apb_init(APB_SPECIAL_BASE, APB_MEM_BASE, irq, &pci_bus2,

                           &pci_bus3);

    isa_mem_base = APB_PCI_IO_BASE;

    pci_vga_init(pci_bus);

    // XXX Should be pci_bus3

    pci_ebus_init(pci_bus, -1);

    i = 0;

    if (hwdef->console_serial_base) {

        serial_mm_init(hwdef->console_serial_base, 0, NULL, 115200,

                       serial_hds[i], 1, 1);

        i++;

    }

    for(; i < MAX_SERIAL_PORTS; i++) {

        if (serial_hds[i]) {

            serial_isa_init(i, serial_hds[i]);

        }

    }

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

        if (parallel_hds[i]) {

            parallel_init(i, parallel_hds[i]);

        }

    }

    for(i = 0; i < nb_nics; i++)

        pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);

    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {

        fprintf(stderr, "qemu: too many IDE bus\n");

        exit(1);

    }

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

        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS,

                          i % MAX_IDE_DEVS);

    }

    pci_cmd646_ide_init(pci_bus, hd, 1);

    isa_create_simple("i8042");

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

        fd[i] = drive_get(IF_FLOPPY, 0, i);

    }

    fdctrl_init_isa(fd);

    nvram = m48t59_init_isa(0x0074, NVRAM_SIZE, 59);

    initrd_size = 0;

    kernel_size = sun4u_load_kernel(kernel_filename, initrd_filename,

                                    ram_size, &initrd_size);

    sun4u_NVRAM_set_params(nvram, NVRAM_SIZE, "Sun4u", RAM_size, boot_devices,

                           KERNEL_LOAD_ADDR, kernel_size,

                           kernel_cmdline,

                           INITRD_LOAD_ADDR, initrd_size,

                           /* XXX: need an option to load a NVRAM image */

                           0,

                           graphic_width, graphic_height, graphic_depth,

                           (uint8_t *)&nd_table[0].macaddr);

    fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);

    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);

    fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);

    fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, hwdef->machine_id);

    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, KERNEL_LOAD_ADDR);

    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);

    if (kernel_cmdline) {

        fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,

                       strlen(kernel_cmdline) + 1);

        fw_cfg_add_bytes(fw_cfg, FW_CFG_CMDLINE_DATA,

                         (uint8_t*)strdup(kernel_cmdline),

                         strlen(kernel_cmdline) + 1);

    } else {

        fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, 0);

    }

    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, INITRD_LOAD_ADDR);

    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);

    fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, boot_devices[0]);

    fw_cfg_add_i16(fw_cfg, FW_CFG_SPARC64_WIDTH, graphic_width);

    fw_cfg_add_i16(fw_cfg, FW_CFG_SPARC64_HEIGHT, graphic_height);

    fw_cfg_add_i16(fw_cfg, FW_CFG_SPARC64_DEPTH, graphic_depth);

    qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);

}

enum {

    sun4u_id = 0,

    sun4v_id = 64,

    niagara_id,

};

static const struct hwdef hwdefs[] = {

    /* Sun4u generic PC-like machine */

    {

        .default_cpu_model = "TI UltraSparc IIi",

        .machine_id = sun4u_id,

        .prom_addr = 0x1fff0000000ULL,

        .console_serial_base = 0,

    },

    /* Sun4v generic PC-like machine */

    {

        .default_cpu_model = "Sun UltraSparc T1",

        .machine_id = sun4v_id,

        .prom_addr = 0x1fff0000000ULL,

        .console_serial_base = 0,

    },

    /* Sun4v generic Niagara machine */

    {

        .default_cpu_model = "Sun UltraSparc T1",

        .machine_id = niagara_id,

        .prom_addr = 0xfff0000000ULL,

        .console_serial_base = 0xfff0c2c000ULL,

    },

};

/* Sun4u hardware initialisation */

static void sun4u_init(ram_addr_t RAM_size,

                       const char *boot_devices,

                       const char *kernel_filename, const char *kernel_cmdline,