Archipelago » qemu

/*

 * QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms

 *

 * Copyright (c) 2003-2005, 2007 Jocelyn Mayer

 *

 * 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 "nvram.h"

#include "qemu-timer.h"

#include "sysemu.h"

#include "sysbus.h"

#include "isa.h"

//#define DEBUG_NVRAM

#if defined(DEBUG_NVRAM)

#define NVRAM_PRINTF(fmt, ...) do { printf(fmt , ## __VA_ARGS__); } while (0)

#else

#define NVRAM_PRINTF(fmt, ...) do { } while (0)

#endif

/*

 * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has

 * alarm and a watchdog timer and related control registers. In the

 * PPC platform there is also a nvram lock function.

 */

/*

 * Chipset docs:

 * http://www.st.com/stonline/products/literature/ds/2410/m48t02.pdf

 * http://www.st.com/stonline/products/literature/ds/2411/m48t08.pdf

 * http://www.st.com/stonline/products/literature/od/7001/m48t59y.pdf

 */

struct M48t59State {

    /* Hardware parameters */

    qemu_irq IRQ;

    MemoryRegion iomem;

    uint32_t io_base;

    uint32_t size;

    /* RTC management */

    time_t   time_offset;

    time_t   stop_time;

    /* Alarm & watchdog */

    struct tm alarm;

    struct QEMUTimer *alrm_timer;

    struct QEMUTimer *wd_timer;

    /* NVRAM storage */

    uint8_t *buffer;

    /* Model parameters */

    uint32_t type; /* 2 = m48t02, 8 = m48t08, 59 = m48t59 */

    /* NVRAM storage */

    uint16_t addr;

    uint8_t  lock;

};

typedef struct M48t59ISAState {

    ISADevice busdev;

    M48t59State state;

    MemoryRegion io;

} M48t59ISAState;

typedef struct M48t59SysBusState {

    SysBusDevice busdev;

    M48t59State state;

} M48t59SysBusState;

/* Fake timer functions */

/* Alarm management */

static void alarm_cb (void *opaque)

{

    struct tm tm;

    uint64_t next_time;

    M48t59State *NVRAM = opaque;

    qemu_set_irq(NVRAM->IRQ, 1);

    if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 &&

        (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&

        (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&

        (NVRAM->buffer[0x1FF2] & 0x80) == 0) {

        /* Repeat once a month */

        qemu_get_timedate(&tm, NVRAM->time_offset);

        tm.tm_mon++;

        if (tm.tm_mon == 13) {

            tm.tm_mon = 1;

            tm.tm_year++;

        }

        next_time = qemu_timedate_diff(&tm) - NVRAM->time_offset;

    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&

               (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&

               (NVRAM->buffer[0x1FF2] & 0x80) == 0) {

        /* Repeat once a day */

        next_time = 24 * 60 * 60;

    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&

               (NVRAM->buffer[0x1FF2] & 0x80) == 0) {

        /* Repeat once an hour */

        next_time = 60 * 60;

    } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF3] & 0x80) != 0 &&

               (NVRAM->buffer[0x1FF2] & 0x80) == 0) {

        /* Repeat once a minute */

        next_time = 60;

    } else {

        /* Repeat once a second */

        next_time = 1;

    }

    qemu_mod_timer(NVRAM->alrm_timer, qemu_get_clock_ns(rtc_clock) +

                    next_time * 1000);

    qemu_set_irq(NVRAM->IRQ, 0);

}

static void set_alarm(M48t59State *NVRAM)

{

    int diff;

    if (NVRAM->alrm_timer != NULL) {

        qemu_del_timer(NVRAM->alrm_timer);

        diff = qemu_timedate_diff(&NVRAM->alarm) - NVRAM->time_offset;

        if (diff > 0)

            qemu_mod_timer(NVRAM->alrm_timer, diff * 1000);

    }

}

/* RTC management helpers */

static inline void get_time(M48t59State *NVRAM, struct tm *tm)

{

    qemu_get_timedate(tm, NVRAM->time_offset);

}

static void set_time(M48t59State *NVRAM, struct tm *tm)

{

    NVRAM->time_offset = qemu_timedate_diff(tm);

    set_alarm(NVRAM);

}

/* Watchdog management */

static void watchdog_cb (void *opaque)

{

    M48t59State *NVRAM = opaque;

    NVRAM->buffer[0x1FF0] |= 0x80;

    if (NVRAM->buffer[0x1FF7] & 0x80) {

        NVRAM->buffer[0x1FF7] = 0x00;

        NVRAM->buffer[0x1FFC] &= ~0x40;

        /* May it be a hw CPU Reset instead ? */

        qemu_system_reset_request();

    } else {

        qemu_set_irq(NVRAM->IRQ, 1);

        qemu_set_irq(NVRAM->IRQ, 0);

    }

}

static void set_up_watchdog(M48t59State *NVRAM, uint8_t value)

{

    uint64_t interval; /* in 1/16 seconds */

    NVRAM->buffer[0x1FF0] &= ~0x80;

    if (NVRAM->wd_timer != NULL) {

        qemu_del_timer(NVRAM->wd_timer);

        if (value != 0) {

            interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);

            qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +

                           ((interval * 1000) >> 4));

        }

    }

}

/* Direct access to NVRAM */

void m48t59_write (void *opaque, uint32_t addr, uint32_t val)

{

    M48t59State *NVRAM = opaque;

    struct tm tm;

    int tmp;

    if (addr > 0x1FF8 && addr < 0x2000)

        NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);

    /* check for NVRAM access */

    if ((NVRAM->type == 2 && addr < 0x7f8) ||

        (NVRAM->type == 8 && addr < 0x1ff8) ||

        (NVRAM->type == 59 && addr < 0x1ff0))

        goto do_write;

    /* TOD access */

    switch (addr) {

    case 0x1FF0:

        /* flags register : read-only */

        break;

    case 0x1FF1:

        /* unused */

        break;

    case 0x1FF2:

        /* alarm seconds */

        tmp = from_bcd(val & 0x7F);

        if (tmp >= 0 && tmp <= 59) {

            NVRAM->alarm.tm_sec = tmp;

            NVRAM->buffer[0x1FF2] = val;

            set_alarm(NVRAM);

        }

        break;

    case 0x1FF3:

        /* alarm minutes */

        tmp = from_bcd(val & 0x7F);

        if (tmp >= 0 && tmp <= 59) {

            NVRAM->alarm.tm_min = tmp;

            NVRAM->buffer[0x1FF3] = val;

            set_alarm(NVRAM);

        }

        break;

    case 0x1FF4:

        /* alarm hours */

        tmp = from_bcd(val & 0x3F);

        if (tmp >= 0 && tmp <= 23) {

            NVRAM->alarm.tm_hour = tmp;

            NVRAM->buffer[0x1FF4] = val;

            set_alarm(NVRAM);

        }

        break;

    case 0x1FF5:

        /* alarm date */

        tmp = from_bcd(val & 0x1F);

        if (tmp != 0) {

            NVRAM->alarm.tm_mday = tmp;

            NVRAM->buffer[0x1FF5] = val;

            set_alarm(NVRAM);

        }

        break;

    case 0x1FF6:

        /* interrupts */

        NVRAM->buffer[0x1FF6] = val;

        break;

    case 0x1FF7:

        /* watchdog */

        NVRAM->buffer[0x1FF7] = val;

        set_up_watchdog(NVRAM, val);

        break;

    case 0x1FF8:

    case 0x07F8:

        /* control */

       NVRAM->buffer[addr] = (val & ~0xA0) | 0x90;

        break;

    case 0x1FF9:

    case 0x07F9:

        /* seconds (BCD) */

        tmp = from_bcd(val & 0x7F);

        if (tmp >= 0 && tmp <= 59) {

            get_time(NVRAM, &tm);

            tm.tm_sec = tmp;

            set_time(NVRAM, &tm);

        }

        if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) {

            if (val & 0x80) {

                NVRAM->stop_time = time(NULL);

            } else {

                NVRAM->time_offset += NVRAM->stop_time - time(NULL);

                NVRAM->stop_time = 0;

            }

        }

        NVRAM->buffer[addr] = val & 0x80;

        break;

    case 0x1FFA:

    case 0x07FA:

        /* minutes (BCD) */

        tmp = from_bcd(val & 0x7F);

        if (tmp >= 0 && tmp <= 59) {

            get_time(NVRAM, &tm);

            tm.tm_min = tmp;

            set_time(NVRAM, &tm);

        }

        break;

    case 0x1FFB:

    case 0x07FB:

        /* hours (BCD) */

        tmp = from_bcd(val & 0x3F);

        if (tmp >= 0 && tmp <= 23) {

            get_time(NVRAM, &tm);

            tm.tm_hour = tmp;

            set_time(NVRAM, &tm);

        }

        break;

    case 0x1FFC:

    case 0x07FC:

        /* day of the week / century */

        tmp = from_bcd(val & 0x07);

        get_time(NVRAM, &tm);

        tm.tm_wday = tmp;

        set_time(NVRAM, &tm);

        NVRAM->buffer[addr] = val & 0x40;

        break;

    case 0x1FFD:

    case 0x07FD:

        /* date */

        tmp = from_bcd(val & 0x1F);

        if (tmp != 0) {

            get_time(NVRAM, &tm);

            tm.tm_mday = tmp;

            set_time(NVRAM, &tm);

        }

        break;

    case 0x1FFE:

    case 0x07FE:

        /* month */

        tmp = from_bcd(val & 0x1F);

        if (tmp >= 1 && tmp <= 12) {

            get_time(NVRAM, &tm);

            tm.tm_mon = tmp - 1;

            set_time(NVRAM, &tm);

        }

        break;

    case 0x1FFF:

    case 0x07FF:

        /* year */

        tmp = from_bcd(val);

        if (tmp >= 0 && tmp <= 99) {

            get_time(NVRAM, &tm);

            if (NVRAM->type == 8)

                tm.tm_year = from_bcd(val) + 68; // Base year is 1968

            else

                tm.tm_year = from_bcd(val);

            set_time(NVRAM, &tm);

        }

        break;

    default:

        /* Check lock registers state */

        if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))

            break;

        if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))

            break;

    do_write:

        if (addr < NVRAM->size) {

            NVRAM->buffer[addr] = val & 0xFF;

        }

        break;

    }

}

uint32_t m48t59_read (void *opaque, uint32_t addr)

{

    M48t59State *NVRAM = opaque;

    struct tm tm;

    uint32_t retval = 0xFF;

    /* check for NVRAM access */

    if ((NVRAM->type == 2 && addr < 0x078f) ||

        (NVRAM->type == 8 && addr < 0x1ff8) ||

        (NVRAM->type == 59 && addr < 0x1ff0))

        goto do_read;

    /* TOD access */

    switch (addr) {

    case 0x1FF0:

        /* flags register */

        goto do_read;

    case 0x1FF1:

        /* unused */

        retval = 0;

        break;

    case 0x1FF2:

        /* alarm seconds */

        goto do_read;

    case 0x1FF3:

        /* alarm minutes */

        goto do_read;

    case 0x1FF4:

        /* alarm hours */

        goto do_read;

    case 0x1FF5:

        /* alarm date */

        goto do_read;

    case 0x1FF6:

        /* interrupts */

        goto do_read;

    case 0x1FF7:

        /* A read resets the watchdog */

        set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);

        goto do_read;

    case 0x1FF8:

    case 0x07F8:

        /* control */

        goto do_read;

    case 0x1FF9:

    case 0x07F9:

        /* seconds (BCD) */

        get_time(NVRAM, &tm);

        retval = (NVRAM->buffer[addr] & 0x80) | to_bcd(tm.tm_sec);

        break;

    case 0x1FFA:

    case 0x07FA:

        /* minutes (BCD) */

        get_time(NVRAM, &tm);

        retval = to_bcd(tm.tm_min);

        break;

    case 0x1FFB:

    case 0x07FB:

        /* hours (BCD) */

        get_time(NVRAM, &tm);

        retval = to_bcd(tm.tm_hour);

        break;

    case 0x1FFC:

    case 0x07FC:

        /* day of the week / century */

        get_time(NVRAM, &tm);

        retval = NVRAM->buffer[addr] | tm.tm_wday;

        break;

    case 0x1FFD:

    case 0x07FD:

        /* date */

        get_time(NVRAM, &tm);

        retval = to_bcd(tm.tm_mday);

        break;

    case 0x1FFE:

    case 0x07FE:

        /* month */

        get_time(NVRAM, &tm);

        retval = to_bcd(tm.tm_mon + 1);

        break;

    case 0x1FFF:

    case 0x07FF:

        /* year */

        get_time(NVRAM, &tm);

        if (NVRAM->type == 8)

            retval = to_bcd(tm.tm_year - 68); // Base year is 1968

        else

            retval = to_bcd(tm.tm_year);

        break;

    default:

        /* Check lock registers state */

        if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))

            break;

        if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))

            break;

    do_read:

        if (addr < NVRAM->size) {

            retval = NVRAM->buffer[addr];

        }

        break;

    }

    if (addr > 0x1FF9 && addr < 0x2000)

       NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);

    return retval;

}

void m48t59_set_addr (void *opaque, uint32_t addr)

{

    M48t59State *NVRAM = opaque;

    NVRAM->addr = addr;

}

void m48t59_toggle_lock (void *opaque, int lock)

{

    M48t59State *NVRAM = opaque;

    NVRAM->lock ^= 1 << lock;

}

/* IO access to NVRAM */

static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val)

{

    M48t59State *NVRAM = opaque;

    NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);

    switch (addr) {

    case 0:

        NVRAM->addr &= ~0x00FF;

        NVRAM->addr |= val;

        break;

    case 1:

        NVRAM->addr &= ~0xFF00;

        NVRAM->addr |= val << 8;

        break;

    case 3:

        m48t59_write(NVRAM, NVRAM->addr, val);

        NVRAM->addr = 0x0000;

        break;

    default:

        break;

    }

}

static uint32_t NVRAM_readb (void *opaque, uint32_t addr)

{

    M48t59State *NVRAM = opaque;

    uint32_t retval;

    switch (addr) {

    case 3:

        retval = m48t59_read(NVRAM, NVRAM->addr);

        break;

    default:

        retval = -1;

        break;

    }

    NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);

    return retval;

}

static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)

{

    M48t59State *NVRAM = opaque;

    m48t59_write(NVRAM, addr, value & 0xff);

}

static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)

{

    M48t59State *NVRAM = opaque;

    m48t59_write(NVRAM, addr, (value >> 8) & 0xff);

    m48t59_write(NVRAM, addr + 1, value & 0xff);

}

static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)

{

    M48t59State *NVRAM = opaque;

    m48t59_write(NVRAM, addr, (value >> 24) & 0xff);

    m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);

    m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);

    m48t59_write(NVRAM, addr + 3, value & 0xff);

}

static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)

{

    M48t59State *NVRAM = opaque;

    uint32_t retval;

    retval = m48t59_read(NVRAM, addr);

    return retval;

}

static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)

{

    M48t59State *NVRAM = opaque;

    uint32_t retval;

    retval = m48t59_read(NVRAM, addr) << 8;

    retval |= m48t59_read(NVRAM, addr + 1);

    return retval;

}

static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)

{

    M48t59State *NVRAM = opaque;

    uint32_t retval;

    retval = m48t59_read(NVRAM, addr) << 24;

    retval |= m48t59_read(NVRAM, addr + 1) << 16;

    retval |= m48t59_read(NVRAM, addr + 2) << 8;

    retval |= m48t59_read(NVRAM, addr + 3);

    return retval;

}

static const MemoryRegionOps nvram_ops = {

    .old_mmio = {

        .read = { nvram_readb, nvram_readw, nvram_readl, },

        .write = { nvram_writeb, nvram_writew, nvram_writel, },

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static const VMStateDescription vmstate_m48t59 = {

    .name = "m48t59",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields      = (VMStateField[]) {

        VMSTATE_UINT8(lock, M48t59State),

        VMSTATE_UINT16(addr, M48t59State),

        VMSTATE_VBUFFER_UINT32(buffer, M48t59State, 0, NULL, 0, size),

        VMSTATE_END_OF_LIST()

    }

};

static void m48t59_reset_common(M48t59State *NVRAM)

{

    NVRAM->addr = 0;

    NVRAM->lock = 0;

    if (NVRAM->alrm_timer != NULL)

        qemu_del_timer(NVRAM->alrm_timer);

    if (NVRAM->wd_timer != NULL)

        qemu_del_timer(NVRAM->wd_timer);

}

static void m48t59_reset_isa(DeviceState *d)

{

    M48t59ISAState *isa = container_of(d, M48t59ISAState, busdev.qdev);

    M48t59State *NVRAM = &isa->state;

    m48t59_reset_common(NVRAM);

}

static void m48t59_reset_sysbus(DeviceState *d)

{

    M48t59SysBusState *sys = container_of(d, M48t59SysBusState, busdev.qdev);

    M48t59State *NVRAM = &sys->state;

    m48t59_reset_common(NVRAM);

}

static const MemoryRegionPortio m48t59_portio[] = {

    {0, 4, 1, .read = NVRAM_readb, .write = NVRAM_writeb },

    PORTIO_END_OF_LIST(),

};

static const MemoryRegionOps m48t59_io_ops = {

    .old_portio = m48t59_portio,

};

/* Initialisation routine */

M48t59State *m48t59_init(qemu_irq IRQ, target_phys_addr_t mem_base,

                         uint32_t io_base, uint16_t size, int type)

{

    DeviceState *dev;

    SysBusDevice *s;

    M48t59SysBusState *d;

    M48t59State *state;

    dev = qdev_create(NULL, "m48t59");

    qdev_prop_set_uint32(dev, "type", type);

    qdev_prop_set_uint32(dev, "size", size);

    qdev_prop_set_uint32(dev, "io_base", io_base);

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    d = FROM_SYSBUS(M48t59SysBusState, s);

    state = &d->state;

    sysbus_connect_irq(s, 0, IRQ);

    if (io_base != 0) {

        register_ioport_read(io_base, 0x04, 1, NVRAM_readb, state);

        register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, state);

    }

    if (mem_base != 0) {

        sysbus_mmio_map(s, 0, mem_base);

    }

    return state;

}

M48t59State *m48t59_init_isa(ISABus *bus, uint32_t io_base, uint16_t size,

                             int type)

{

    M48t59ISAState *d;

    ISADevice *dev;

    M48t59State *s;

    dev = isa_create(bus, "m48t59_isa");

    qdev_prop_set_uint32(&dev->qdev, "type", type);

    qdev_prop_set_uint32(&dev->qdev, "size", size);

    qdev_prop_set_uint32(&dev->qdev, "io_base", io_base);

    qdev_init_nofail(&dev->qdev);

    d = DO_UPCAST(M48t59ISAState, busdev, dev);

    s = &d->state;

    memory_region_init_io(&d->io, &m48t59_io_ops, s, "m48t59", 4);

    if (io_base != 0) {

        isa_register_ioport(dev, &d->io, io_base);

    }

    return s;

}

static void m48t59_init_common(M48t59State *s)

{

    s->buffer = g_malloc0(s->size);

    if (s->type == 59) {

        s->alrm_timer = qemu_new_timer_ns(rtc_clock, &alarm_cb, s);

        s->wd_timer = qemu_new_timer_ns(vm_clock, &watchdog_cb, s);

    }

    qemu_get_timedate(&s->alarm, 0);

    vmstate_register(NULL, -1, &vmstate_m48t59, s);

}

static int m48t59_init_isa1(ISADevice *dev)

{

    M48t59ISAState *d = DO_UPCAST(M48t59ISAState, busdev, dev);

    M48t59State *s = &d->state;

    isa_init_irq(dev, &s->IRQ, 8);

    m48t59_init_common(s);

    return 0;

}

static int m48t59_init1(SysBusDevice *dev)

{

    M48t59SysBusState *d = FROM_SYSBUS(M48t59SysBusState, dev);

    M48t59State *s = &d->state;

    sysbus_init_irq(dev, &s->IRQ);

    memory_region_init_io(&s->iomem, &nvram_ops, s, "m48t59.nvram", s->size);

    sysbus_init_mmio(dev, &s->iomem);

    m48t59_init_common(s);

    return 0;

}

static Property m48t59_isa_properties[] = {

    DEFINE_PROP_UINT32("size",    M48t59ISAState, state.size,    -1),

    DEFINE_PROP_UINT32("type",    M48t59ISAState, state.type,    -1),

    DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base,  0),

    DEFINE_PROP_END_OF_LIST(),

};

static void m48t59_init_class_isa1(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);

    ic->init = m48t59_init_isa1;

    dc->no_user = 1;

    dc->reset = m48t59_reset_isa;

    dc->props = m48t59_isa_properties;

}

static TypeInfo m48t59_isa_info = {

    .name          = "m48t59_isa",

    .parent        = TYPE_ISA_DEVICE,

    .instance_size = sizeof(M48t59ISAState),

    .class_init    = m48t59_init_class_isa1,

};

static Property m48t59_properties[] = {

    DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1),

    DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1),

    DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0),

    DEFINE_PROP_END_OF_LIST(),

};

static void m48t59_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = m48t59_init1;

    dc->reset = m48t59_reset_sysbus;

    dc->props = m48t59_properties;

}

static TypeInfo m48t59_info = {

    .name          = "m48t59",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(M48t59SysBusState),

    .class_init    = m48t59_class_init,

};

static void m48t59_register_types(void)

{

    type_register_static(&m48t59_info);

    type_register_static(&m48t59_isa_info);

}

type_init(m48t59_register_types)