Archipelago » qemu

/*

 *  CFI parallel flash with Intel command set emulation

 *

 *  Copyright (c) 2006 Thorsten Zitterell

 *  Copyright (c) 2005 Jocelyn Mayer

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

/*

 * For now, this code can emulate flashes of 1, 2 or 4 bytes width.

 * Supported commands/modes are:

 * - flash read

 * - flash write

 * - flash ID read

 * - sector erase

 * - CFI queries

 *

 * It does not support timings

 * It does not support flash interleaving

 * It does not implement software data protection as found in many real chips

 * It does not implement erase suspend/resume commands

 * It does not implement multiple sectors erase

 *

 * It does not implement much more ...

 */

#include "hw/hw.h"

#include "hw/block/flash.h"

#include "block/block.h"

#include "qemu/timer.h"

#include "exec/address-spaces.h"

#include "qemu/host-utils.h"

#include "hw/sysbus.h"

#define PFLASH_BUG(fmt, ...) \

do { \

    fprintf(stderr, "PFLASH: Possible BUG - " fmt, ## __VA_ARGS__); \

    exit(1); \

} while(0)

/* #define PFLASH_DEBUG */

#ifdef PFLASH_DEBUG

#define DPRINTF(fmt, ...)                                   \

do {                                                        \

    fprintf(stderr, "PFLASH: " fmt , ## __VA_ARGS__);       \

} while (0)

#else

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

#endif

#define TYPE_CFI_PFLASH01 "cfi.pflash01"

#define CFI_PFLASH01(obj) OBJECT_CHECK(pflash_t, (obj), TYPE_CFI_PFLASH01)

struct pflash_t {

    /*< private >*/

    SysBusDevice parent_obj;

    /*< public >*/

    BlockDriverState *bs;

    uint32_t nb_blocs;

    uint64_t sector_len;

    uint8_t bank_width;

    uint8_t be;

    uint8_t wcycle; /* if 0, the flash is read normally */

    int ro;

    uint8_t cmd;

    uint8_t status;

    uint16_t ident0;

    uint16_t ident1;

    uint16_t ident2;

    uint16_t ident3;

    uint8_t cfi_len;

    uint8_t cfi_table[0x52];

    uint64_t counter;

    unsigned int writeblock_size;

    QEMUTimer *timer;

    MemoryRegion mem;

    char *name;

    void *storage;

};

static const VMStateDescription vmstate_pflash = {

    .name = "pflash_cfi01",

    .version_id = 1,

    .minimum_version_id = 1,

    .fields = (VMStateField[]) {

        VMSTATE_UINT8(wcycle, pflash_t),

        VMSTATE_UINT8(cmd, pflash_t),

        VMSTATE_UINT8(status, pflash_t),

        VMSTATE_UINT64(counter, pflash_t),

        VMSTATE_END_OF_LIST()

    }

};

static void pflash_timer (void *opaque)

{

    pflash_t *pfl = opaque;

    DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);

    /* Reset flash */

    pfl->status ^= 0x80;

    memory_region_rom_device_set_romd(&pfl->mem, true);

    pfl->wcycle = 0;

    pfl->cmd = 0;

}

static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,

                             int width, int be)

{

    hwaddr boff;

    uint32_t ret;

    uint8_t *p;

    ret = -1;

    boff = offset & 0xFF; /* why this here ?? */

    if (pfl->bank_width == 2) {

        boff = boff >> 1;

    } else if (pfl->bank_width == 4) {

        boff = boff >> 2;

    }

#if 0

    DPRINTF("%s: reading offset " TARGET_FMT_plx " under cmd %02x width %d\n",

            __func__, offset, pfl->cmd, width);

#endif

    switch (pfl->cmd) {

    default:

        /* This should never happen : reset state & treat it as a read */

        DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);

        pfl->wcycle = 0;

        pfl->cmd = 0;

        /* fall through to read code */

    case 0x00:

        /* Flash area read */

        p = pfl->storage;

        switch (width) {

        case 1:

            ret = p[offset];

            DPRINTF("%s: data offset " TARGET_FMT_plx " %02x\n",

                    __func__, offset, ret);

            break;

        case 2:

            if (be) {

                ret = p[offset] << 8;

                ret |= p[offset + 1];

            } else {

                ret = p[offset];

                ret |= p[offset + 1] << 8;

            }

            DPRINTF("%s: data offset " TARGET_FMT_plx " %04x\n",

                    __func__, offset, ret);

            break;

        case 4:

            if (be) {

                ret = p[offset] << 24;

                ret |= p[offset + 1] << 16;

                ret |= p[offset + 2] << 8;

                ret |= p[offset + 3];

            } else {

                ret = p[offset];

                ret |= p[offset + 1] << 8;

                ret |= p[offset + 2] << 16;

                ret |= p[offset + 3] << 24;

            }

            DPRINTF("%s: data offset " TARGET_FMT_plx " %08x\n",

                    __func__, offset, ret);

            break;

        default:

            DPRINTF("BUG in %s\n", __func__);

        }

        break;

    case 0x10: /* Single byte program */

    case 0x20: /* Block erase */

    case 0x28: /* Block erase */

    case 0x40: /* single byte program */

    case 0x50: /* Clear status register */

    case 0x60: /* Block /un)lock */

    case 0x70: /* Status Register */

    case 0xe8: /* Write block */

        /* Status register read */

        ret = pfl->status;

        if (width > 2) {

            ret |= pfl->status << 16;

        }

        DPRINTF("%s: status %x\n", __func__, ret);

        break;

    case 0x90:

        switch (boff) {

        case 0:

            ret = pfl->ident0 << 8 | pfl->ident1;

            DPRINTF("%s: Manufacturer Code %04x\n", __func__, ret);

            break;

        case 1:

            ret = pfl->ident2 << 8 | pfl->ident3;

            DPRINTF("%s: Device ID Code %04x\n", __func__, ret);

            break;

        default:

            DPRINTF("%s: Read Device Information boff=%x\n", __func__,

                    (unsigned)boff);

            ret = 0;

            break;

        }

        break;

    case 0x98: /* Query mode */

        if (boff > pfl->cfi_len)

            ret = 0;

        else

            ret = pfl->cfi_table[boff];

        break;

    }

    return ret;

}

/* update flash content on disk */

static void pflash_update(pflash_t *pfl, int offset,

                          int size)

{

    int offset_end;

    if (pfl->bs) {

        offset_end = offset + size;

        /* round to sectors */

        offset = offset >> 9;

        offset_end = (offset_end + 511) >> 9;

        bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),

                   offset_end - offset);

    }

}

static inline void pflash_data_write(pflash_t *pfl, hwaddr offset,

                                     uint32_t value, int width, int be)

{

    uint8_t *p = pfl->storage;

    DPRINTF("%s: block write offset " TARGET_FMT_plx

            " value %x counter %016" PRIx64 "\n",

            __func__, offset, value, pfl->counter);

    switch (width) {

    case 1:

        p[offset] = value;

        break;

    case 2:

        if (be) {

            p[offset] = value >> 8;

            p[offset + 1] = value;

        } else {

            p[offset] = value;

            p[offset + 1] = value >> 8;

        }

        break;

    case 4:

        if (be) {

            p[offset] = value >> 24;

            p[offset + 1] = value >> 16;

            p[offset + 2] = value >> 8;

            p[offset + 3] = value;

        } else {

            p[offset] = value;

            p[offset + 1] = value >> 8;

            p[offset + 2] = value >> 16;

            p[offset + 3] = value >> 24;

        }

        break;

    }

}

static void pflash_write(pflash_t *pfl, hwaddr offset,

                         uint32_t value, int width, int be)

{

    uint8_t *p;

    uint8_t cmd;

    cmd = value;

    DPRINTF("%s: writing offset " TARGET_FMT_plx " value %08x width %d wcycle 0x%x\n",

            __func__, offset, value, width, pfl->wcycle);

    if (!pfl->wcycle) {

        /* Set the device in I/O access mode */

        memory_region_rom_device_set_romd(&pfl->mem, false);

    }

    switch (pfl->wcycle) {

    case 0:

        /* read mode */

        switch (cmd) {

        case 0x00: /* ??? */

            goto reset_flash;

        case 0x10: /* Single Byte Program */

        case 0x40: /* Single Byte Program */

            DPRINTF("%s: Single Byte Program\n", __func__);

            break;

        case 0x20: /* Block erase */

            p = pfl->storage;

            offset &= ~(pfl->sector_len - 1);

            DPRINTF("%s: block erase at " TARGET_FMT_plx " bytes %x\n",

                    __func__, offset, (unsigned)pfl->sector_len);

            if (!pfl->ro) {

                memset(p + offset, 0xff, pfl->sector_len);

                pflash_update(pfl, offset, pfl->sector_len);

            } else {

                pfl->status |= 0x20; /* Block erase error */

            }

            pfl->status |= 0x80; /* Ready! */

            break;

        case 0x50: /* Clear status bits */

            DPRINTF("%s: Clear status bits\n", __func__);

            pfl->status = 0x0;

            goto reset_flash;

        case 0x60: /* Block (un)lock */

            DPRINTF("%s: Block unlock\n", __func__);

            break;

        case 0x70: /* Status Register */

            DPRINTF("%s: Read status register\n", __func__);

            pfl->cmd = cmd;

            return;

        case 0x90: /* Read Device ID */

            DPRINTF("%s: Read Device information\n", __func__);

            pfl->cmd = cmd;

            return;

        case 0x98: /* CFI query */

            DPRINTF("%s: CFI query\n", __func__);

            break;

        case 0xe8: /* Write to buffer */

            DPRINTF("%s: Write to buffer\n", __func__);

            pfl->status |= 0x80; /* Ready! */

            break;

        case 0xf0: /* Probe for AMD flash */

            DPRINTF("%s: Probe for AMD flash\n", __func__);

            goto reset_flash;

        case 0xff: /* Read array mode */

            DPRINTF("%s: Read array mode\n", __func__);

            goto reset_flash;

        default:

            goto error_flash;

        }

        pfl->wcycle++;

        pfl->cmd = cmd;

        break;

    case 1:

        switch (pfl->cmd) {

        case 0x10: /* Single Byte Program */

        case 0x40: /* Single Byte Program */

            DPRINTF("%s: Single Byte Program\n", __func__);

            if (!pfl->ro) {

                pflash_data_write(pfl, offset, value, width, be);

                pflash_update(pfl, offset, width);

            } else {

                pfl->status |= 0x10; /* Programming error */

            }

            pfl->status |= 0x80; /* Ready! */

            pfl->wcycle = 0;

        break;

        case 0x20: /* Block erase */

        case 0x28:

            if (cmd == 0xd0) { /* confirm */

                pfl->wcycle = 0;

                pfl->status |= 0x80;

            } else if (cmd == 0xff) { /* read array mode */

                goto reset_flash;

            } else

                goto error_flash;

            break;

        case 0xe8:

            DPRINTF("%s: block write of %x bytes\n", __func__, value);

            pfl->counter = value;

            pfl->wcycle++;

            break;

        case 0x60:

            if (cmd == 0xd0) {

                pfl->wcycle = 0;

                pfl->status |= 0x80;

            } else if (cmd == 0x01) {

                pfl->wcycle = 0;

                pfl->status |= 0x80;

            } else if (cmd == 0xff) {

                goto reset_flash;

            } else {

                DPRINTF("%s: Unknown (un)locking command\n", __func__);

                goto reset_flash;

            }

            break;

        case 0x98:

            if (cmd == 0xff) {

                goto reset_flash;

            } else {

                DPRINTF("%s: leaving query mode\n", __func__);

            }

            break;

        default:

            goto error_flash;

        }

        break;

    case 2:

        switch (pfl->cmd) {

        case 0xe8: /* Block write */

            if (!pfl->ro) {

                pflash_data_write(pfl, offset, value, width, be);

            } else {

                pfl->status |= 0x10; /* Programming error */

            }

            pfl->status |= 0x80;

            if (!pfl->counter) {

                hwaddr mask = pfl->writeblock_size - 1;

                mask = ~mask;

                DPRINTF("%s: block write finished\n", __func__);

                pfl->wcycle++;

                if (!pfl->ro) {

                    /* Flush the entire write buffer onto backing storage.  */

                    pflash_update(pfl, offset & mask, pfl->writeblock_size);

                } else {

                    pfl->status |= 0x10; /* Programming error */

                }

            }

            pfl->counter--;

            break;

        default:

            goto error_flash;

        }

        break;

    case 3: /* Confirm mode */

        switch (pfl->cmd) {

        case 0xe8: /* Block write */

            if (cmd == 0xd0) {

                pfl->wcycle = 0;

                pfl->status |= 0x80;

            } else {

                DPRINTF("%s: unknown command for \"write block\"\n", __func__);

                PFLASH_BUG("Write block confirm");

                goto reset_flash;

            }

            break;

        default:

            goto error_flash;

        }

        break;

    default:

        /* Should never happen */

        DPRINTF("%s: invalid write state\n",  __func__);

        goto reset_flash;

    }

    return;

 error_flash:

    qemu_log_mask(LOG_UNIMP, "%s: Unimplemented flash cmd sequence "

                  "(offset " TARGET_FMT_plx ", wcycle 0x%x cmd 0x%x value 0x%x)"

                  "\n", __func__, offset, pfl->wcycle, pfl->cmd, value);

 reset_flash:

    memory_region_rom_device_set_romd(&pfl->mem, true);

    pfl->wcycle = 0;

    pfl->cmd = 0;

}

static uint32_t pflash_readb_be(void *opaque, hwaddr addr)

{

    return pflash_read(opaque, addr, 1, 1);

}

static uint32_t pflash_readb_le(void *opaque, hwaddr addr)

{

    return pflash_read(opaque, addr, 1, 0);

}

static uint32_t pflash_readw_be(void *opaque, hwaddr addr)

{

    pflash_t *pfl = opaque;

    return pflash_read(pfl, addr, 2, 1);

}

static uint32_t pflash_readw_le(void *opaque, hwaddr addr)

{

    pflash_t *pfl = opaque;

    return pflash_read(pfl, addr, 2, 0);

}

static uint32_t pflash_readl_be(void *opaque, hwaddr addr)

{

    pflash_t *pfl = opaque;

    return pflash_read(pfl, addr, 4, 1);

}

static uint32_t pflash_readl_le(void *opaque, hwaddr addr)

{

    pflash_t *pfl = opaque;

    return pflash_read(pfl, addr, 4, 0);

}

static void pflash_writeb_be(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_write(opaque, addr, value, 1, 1);

}

static void pflash_writeb_le(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_write(opaque, addr, value, 1, 0);

}

static void pflash_writew_be(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_t *pfl = opaque;

    pflash_write(pfl, addr, value, 2, 1);

}

static void pflash_writew_le(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_t *pfl = opaque;

    pflash_write(pfl, addr, value, 2, 0);

}

static void pflash_writel_be(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_t *pfl = opaque;

    pflash_write(pfl, addr, value, 4, 1);

}

static void pflash_writel_le(void *opaque, hwaddr addr,

                             uint32_t value)

{

    pflash_t *pfl = opaque;

    pflash_write(pfl, addr, value, 4, 0);

}

static const MemoryRegionOps pflash_cfi01_ops_be = {

    .old_mmio = {

        .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },

        .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static const MemoryRegionOps pflash_cfi01_ops_le = {

    .old_mmio = {

        .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },

        .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void pflash_cfi01_realize(DeviceState *dev, Error **errp)

{

    pflash_t *pfl = CFI_PFLASH01(dev);

    uint64_t total_len;

    int ret;

    total_len = pfl->sector_len * pfl->nb_blocs;

    /* XXX: to be fixed */

#if 0

    if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&

        total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))

        return NULL;

#endif

    memory_region_init_rom_device(

        &pfl->mem, OBJECT(dev),

        pfl->be ? &pflash_cfi01_ops_be : &pflash_cfi01_ops_le, pfl,

        pfl->name, total_len);

    vmstate_register_ram(&pfl->mem, DEVICE(pfl));

    pfl->storage = memory_region_get_ram_ptr(&pfl->mem);

    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);

    if (pfl->bs) {

        /* read the initial flash content */

        ret = bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);

        if (ret < 0) {

            vmstate_unregister_ram(&pfl->mem, DEVICE(pfl));

            memory_region_destroy(&pfl->mem);

            error_setg(errp, "failed to read the initial flash content");

            return;

        }

    }

    if (pfl->bs) {

        pfl->ro = bdrv_is_read_only(pfl->bs);

    } else {

        pfl->ro = 0;

    }

    pfl->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pflash_timer, pfl);

    pfl->wcycle = 0;

    pfl->cmd = 0;

    pfl->status = 0;

    /* Hardcoded CFI table */

    pfl->cfi_len = 0x52;

    /* Standard "QRY" string */

    pfl->cfi_table[0x10] = 'Q';

    pfl->cfi_table[0x11] = 'R';

    pfl->cfi_table[0x12] = 'Y';

    /* Command set (Intel) */

    pfl->cfi_table[0x13] = 0x01;

    pfl->cfi_table[0x14] = 0x00;

    /* Primary extended table address (none) */

    pfl->cfi_table[0x15] = 0x31;

    pfl->cfi_table[0x16] = 0x00;

    /* Alternate command set (none) */

    pfl->cfi_table[0x17] = 0x00;

    pfl->cfi_table[0x18] = 0x00;

    /* Alternate extended table (none) */

    pfl->cfi_table[0x19] = 0x00;

    pfl->cfi_table[0x1A] = 0x00;

    /* Vcc min */

    pfl->cfi_table[0x1B] = 0x45;

    /* Vcc max */

    pfl->cfi_table[0x1C] = 0x55;

    /* Vpp min (no Vpp pin) */

    pfl->cfi_table[0x1D] = 0x00;

    /* Vpp max (no Vpp pin) */

    pfl->cfi_table[0x1E] = 0x00;

    /* Reserved */

    pfl->cfi_table[0x1F] = 0x07;

    /* Timeout for min size buffer write */

    pfl->cfi_table[0x20] = 0x07;

    /* Typical timeout for block erase */

    pfl->cfi_table[0x21] = 0x0a;

    /* Typical timeout for full chip erase (4096 ms) */

    pfl->cfi_table[0x22] = 0x00;

    /* Reserved */

    pfl->cfi_table[0x23] = 0x04;

    /* Max timeout for buffer write */

    pfl->cfi_table[0x24] = 0x04;

    /* Max timeout for block erase */

    pfl->cfi_table[0x25] = 0x04;

    /* Max timeout for chip erase */

    pfl->cfi_table[0x26] = 0x00;

    /* Device size */

    pfl->cfi_table[0x27] = ctz32(total_len); // + 1;

    /* Flash device interface (8 & 16 bits) */

    pfl->cfi_table[0x28] = 0x02;

    pfl->cfi_table[0x29] = 0x00;

    /* Max number of bytes in multi-bytes write */

    if (pfl->bank_width == 1) {

        pfl->cfi_table[0x2A] = 0x08;

    } else {

        pfl->cfi_table[0x2A] = 0x0B;

    }

    pfl->writeblock_size = 1 << pfl->cfi_table[0x2A];

    pfl->cfi_table[0x2B] = 0x00;

    /* Number of erase block regions (uniform) */

    pfl->cfi_table[0x2C] = 0x01;

    /* Erase block region 1 */

    pfl->cfi_table[0x2D] = pfl->nb_blocs - 1;

    pfl->cfi_table[0x2E] = (pfl->nb_blocs - 1) >> 8;

    pfl->cfi_table[0x2F] = pfl->sector_len >> 8;

    pfl->cfi_table[0x30] = pfl->sector_len >> 16;

    /* Extended */

    pfl->cfi_table[0x31] = 'P';

    pfl->cfi_table[0x32] = 'R';

    pfl->cfi_table[0x33] = 'I';

    pfl->cfi_table[0x34] = '1';

    pfl->cfi_table[0x35] = '0';

    pfl->cfi_table[0x36] = 0x00;

    pfl->cfi_table[0x37] = 0x00;

    pfl->cfi_table[0x38] = 0x00;

    pfl->cfi_table[0x39] = 0x00;

    pfl->cfi_table[0x3a] = 0x00;

    pfl->cfi_table[0x3b] = 0x00;

    pfl->cfi_table[0x3c] = 0x00;

    pfl->cfi_table[0x3f] = 0x01; /* Number of protection fields */

}

static Property pflash_cfi01_properties[] = {

    DEFINE_PROP_DRIVE("drive", struct pflash_t, bs),

    DEFINE_PROP_UINT32("num-blocks", struct pflash_t, nb_blocs, 0),

    DEFINE_PROP_UINT64("sector-length", struct pflash_t, sector_len, 0),

    DEFINE_PROP_UINT8("width", struct pflash_t, bank_width, 0),

    DEFINE_PROP_UINT8("big-endian", struct pflash_t, be, 0),

    DEFINE_PROP_UINT16("id0", struct pflash_t, ident0, 0),

    DEFINE_PROP_UINT16("id1", struct pflash_t, ident1, 0),

    DEFINE_PROP_UINT16("id2", struct pflash_t, ident2, 0),

    DEFINE_PROP_UINT16("id3", struct pflash_t, ident3, 0),

    DEFINE_PROP_STRING("name", struct pflash_t, name),

    DEFINE_PROP_END_OF_LIST(),

};

static void pflash_cfi01_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->realize = pflash_cfi01_realize;

    dc->props = pflash_cfi01_properties;

    dc->vmsd = &vmstate_pflash;

    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);

}

static const TypeInfo pflash_cfi01_info = {

    .name           = TYPE_CFI_PFLASH01,

    .parent         = TYPE_SYS_BUS_DEVICE,

    .instance_size  = sizeof(struct pflash_t),

    .class_init     = pflash_cfi01_class_init,

};

static void pflash_cfi01_register_types(void)

{

    type_register_static(&pflash_cfi01_info);

}

type_init(pflash_cfi01_register_types)

pflash_t *pflash_cfi01_register(hwaddr base,

                                DeviceState *qdev, const char *name,

                                hwaddr size,

                                BlockDriverState *bs,

                                uint32_t sector_len, int nb_blocs,

                                int bank_width, uint16_t id0, uint16_t id1,

                                uint16_t id2, uint16_t id3, int be)

{

    DeviceState *dev = qdev_create(NULL, TYPE_CFI_PFLASH01);

    if (bs && qdev_prop_set_drive(dev, "drive", bs)) {

        abort();

    }

    qdev_prop_set_uint32(dev, "num-blocks", nb_blocs);

    qdev_prop_set_uint64(dev, "sector-length", sector_len);

    qdev_prop_set_uint8(dev, "width", bank_width);

    qdev_prop_set_uint8(dev, "big-endian", !!be);

    qdev_prop_set_uint16(dev, "id0", id0);

    qdev_prop_set_uint16(dev, "id1", id1);

    qdev_prop_set_uint16(dev, "id2", id2);

    qdev_prop_set_uint16(dev, "id3", id3);

    qdev_prop_set_string(dev, "name", name);

    qdev_init_nofail(dev);

    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);

    return CFI_PFLASH01(dev);

}

MemoryRegion *pflash_cfi01_get_memory(pflash_t *fl)

{

    return &fl->mem;

}