hw/nvram/fw_cfg.c

   1 /*
   2  * QEMU Firmware configuration device emulation
   3  *
   4  * Copyright (c) 2008 Gleb Natapov
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw/hw.h"
  25 #include "sysemu/sysemu.h"
  26 #include "hw/isa/isa.h"
  27 #include "hw/nvram/fw_cfg.h"
  28 #include "hw/sysbus.h"
  29 #include "trace.h"
  30 #include "qemu/error-report.h"
  31 #include "qemu/config-file.h"
  32
  33 #define FW_CFG_SIZE 2
  34 #define FW_CFG_DATA_SIZE 1
  35 #define TYPE_FW_CFG "fw_cfg"
  36 #define FW_CFG_NAME "fw_cfg"
  37 #define FW_CFG_PATH "/machine/" FW_CFG_NAME
  38 #define FW_CFG(obj) OBJECT_CHECK(FWCfgState, (obj), TYPE_FW_CFG)
  39
  40 typedef struct FWCfgEntry {
  41     uint32_t len;
  42     uint8_t *data;
  43     void *callback_opaque;
  44     FWCfgCallback callback;
  45     FWCfgReadCallback read_callback;
  46 } FWCfgEntry;
  47
  48 struct FWCfgState {
  49     /*< private >*/
  50     SysBusDevice parent_obj;
  51     /*< public >*/
  52
  53     MemoryRegion ctl_iomem, data_iomem, comb_iomem;
  54     uint32_t ctl_iobase, data_iobase;
  55     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
  56     FWCfgFiles *files;
  57     uint16_t cur_entry;
  58     uint32_t cur_offset;
  59     Notifier machine_ready;
  60 };
  61
  62 #define JPG_FILE 0
  63 #define BMP_FILE 1
  64
  65 static char *read_splashfile(char *filename, gsize *file_sizep,
  66                              int *file_typep)
  67 {
  68     GError *err = NULL;
  69     gboolean res;
  70     gchar *content;
  71     int file_type;
  72     unsigned int filehead;
  73     int bmp_bpp;
  74
  75     res = g_file_get_contents(filename, &content, file_sizep, &err);
  76     if (res == FALSE) {
  77         error_report("failed to read splash file '%s'", filename);
  78         g_error_free(err);
  79         return NULL;
  80     }
  81
  82     /* check file size */
  83     if (*file_sizep < 30) {
  84         goto error;
  85     }
  86
  87     /* check magic ID */
  88     filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
  89     if (filehead == 0xd8ff) {
  90         file_type = JPG_FILE;
  91     } else if (filehead == 0x4d42) {
  92         file_type = BMP_FILE;
  93     } else {
  94         goto error;
  95     }
  96
  97     /* check BMP bpp */
  98     if (file_type == BMP_FILE) {
  99         bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
 100         if (bmp_bpp != 24) {
 101             goto error;
 102         }
 103     }
 104
 105     /* return values */
 106     *file_typep = file_type;
 107
 108     return content;
 109
 110 error:
 111     error_report("splash file '%s' format not recognized; must be JPEG "
 112                  "or 24 bit BMP", filename);
 113     g_free(content);
 114     return NULL;
 115 }
 116
 117 static void fw_cfg_bootsplash(FWCfgState *s)
 118 {
 119     int boot_splash_time = -1;
 120     const char *boot_splash_filename = NULL;
 121     char *p;
 122     char *filename, *file_data;
 123     gsize file_size;
 124     int file_type;
 125     const char *temp;
 126
 127     /* get user configuration */
 128     QemuOptsList *plist = qemu_find_opts("boot-opts");
 129     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 130     if (opts != NULL) {
 131         temp = qemu_opt_get(opts, "splash");
 132         if (temp != NULL) {
 133             boot_splash_filename = temp;
 134         }
 135         temp = qemu_opt_get(opts, "splash-time");
 136         if (temp != NULL) {
 137             p = (char *)temp;
 138             boot_splash_time = strtol(p, (char **)&p, 10);
 139         }
 140     }
 141
 142     /* insert splash time if user configurated */
 143     if (boot_splash_time >= 0) {
 144         /* validate the input */
 145         if (boot_splash_time > 0xffff) {
 146             error_report("splash time is big than 65535, force it to 65535.");
 147             boot_splash_time = 0xffff;
 148         }
 149         /* use little endian format */
 150         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 151         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 152         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 153     }
 154
 155     /* insert splash file if user configurated */
 156     if (boot_splash_filename != NULL) {
 157         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 158         if (filename == NULL) {
 159             error_report("failed to find file '%s'.", boot_splash_filename);
 160             return;
 161         }
 162
 163         /* loading file data */
 164         file_data = read_splashfile(filename, &file_size, &file_type);
 165         if (file_data == NULL) {
 166             g_free(filename);
 167             return;
 168         }
 169         if (boot_splash_filedata != NULL) {
 170             g_free(boot_splash_filedata);
 171         }
 172         boot_splash_filedata = (uint8_t *)file_data;
 173         boot_splash_filedata_size = file_size;
 174
 175         /* insert data */
 176         if (file_type == JPG_FILE) {
 177             fw_cfg_add_file(s, "bootsplash.jpg",
 178                     boot_splash_filedata, boot_splash_filedata_size);
 179         } else {
 180             fw_cfg_add_file(s, "bootsplash.bmp",
 181                     boot_splash_filedata, boot_splash_filedata_size);
 182         }
 183         g_free(filename);
 184     }
 185 }
 186
 187 static void fw_cfg_reboot(FWCfgState *s)
 188 {
 189     int reboot_timeout = -1;
 190     char *p;
 191     const char *temp;
 192
 193     /* get user configuration */
 194     QemuOptsList *plist = qemu_find_opts("boot-opts");
 195     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 196     if (opts != NULL) {
 197         temp = qemu_opt_get(opts, "reboot-timeout");
 198         if (temp != NULL) {
 199             p = (char *)temp;
 200             reboot_timeout = strtol(p, (char **)&p, 10);
 201         }
 202     }
 203     /* validate the input */
 204     if (reboot_timeout > 0xffff) {
 205         error_report("reboot timeout is larger than 65535, force it to 65535.");
 206         reboot_timeout = 0xffff;
 207     }
 208     fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
 209 }
 210
 211 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 212 {
 213     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 214     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 215
 216     trace_fw_cfg_write(s, value);
 217
 218     if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
 219         s->cur_offset < e->len) {
 220         e->data[s->cur_offset++] = value;
 221         if (s->cur_offset == e->len) {
 222             e->callback(e->callback_opaque, e->data);
 223             s->cur_offset = 0;
 224         }
 225     }
 226 }
 227
 228 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 229 {
 230     int ret;
 231
 232     s->cur_offset = 0;
 233     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 234         s->cur_entry = FW_CFG_INVALID;
 235         ret = 0;
 236     } else {
 237         s->cur_entry = key;
 238         ret = 1;
 239     }
 240
 241     trace_fw_cfg_select(s, key, ret);
 242     return ret;
 243 }
 244
 245 static uint8_t fw_cfg_read(FWCfgState *s)
 246 {
 247     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 248     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 249     uint8_t ret;
 250
 251     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 252         ret = 0;
 253     else {
 254         if (e->read_callback) {
 255             e->read_callback(e->callback_opaque, s->cur_offset);
 256         }
 257         ret = e->data[s->cur_offset++];
 258     }
 259
 260     trace_fw_cfg_read(s, ret);
 261     return ret;
 262 }
 263
 264 static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr,
 265                                      unsigned size)
 266 {
 267     return fw_cfg_read(opaque);
 268 }
 269
 270 static void fw_cfg_data_mem_write(void *opaque, hwaddr addr,
 271                                   uint64_t value, unsigned size)
 272 {
 273     fw_cfg_write(opaque, (uint8_t)value);
 274 }
 275
 276 static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr,
 277                                  uint64_t value, unsigned size)
 278 {
 279     fw_cfg_select(opaque, (uint16_t)value);
 280 }
 281
 282 static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr,
 283                                  unsigned size, bool is_write)
 284 {
 285     return is_write && size == 2;
 286 }
 287
 288 static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr,
 289                                  unsigned size)
 290 {
 291     return fw_cfg_read(opaque);
 292 }
 293
 294 static void fw_cfg_comb_write(void *opaque, hwaddr addr,
 295                               uint64_t value, unsigned size)
 296 {
 297     switch (size) {
 298     case 1:
 299         fw_cfg_write(opaque, (uint8_t)value);
 300         break;
 301     case 2:
 302         fw_cfg_select(opaque, (uint16_t)value);
 303         break;
 304     }
 305 }
 306
 307 static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
 308                                   unsigned size, bool is_write)
 309 {
 310     return (size == 1) || (is_write && size == 2);
 311 }
 312
 313 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
 314     .write = fw_cfg_ctl_mem_write,
 315     .endianness = DEVICE_NATIVE_ENDIAN,
 316     .valid.accepts = fw_cfg_ctl_mem_valid,
 317 };
 318
 319 static const MemoryRegionOps fw_cfg_data_mem_ops = {
 320     .read = fw_cfg_data_mem_read,
 321     .write = fw_cfg_data_mem_write,
 322     .endianness = DEVICE_NATIVE_ENDIAN,
 323     .valid = {
 324         .min_access_size = 1,
 325         .max_access_size = 1,
 326     },
 327 };
 328
 329 static const MemoryRegionOps fw_cfg_comb_mem_ops = {
 330     .read = fw_cfg_comb_read,
 331     .write = fw_cfg_comb_write,
 332     .endianness = DEVICE_LITTLE_ENDIAN,
 333     .valid.accepts = fw_cfg_comb_valid,
 334 };
 335
 336 static void fw_cfg_reset(DeviceState *d)
 337 {
 338     FWCfgState *s = FW_CFG(d);
 339
 340     fw_cfg_select(s, 0);
 341 }
 342
 343 /* Save restore 32 bit int as uint16_t
 344    This is a Big hack, but it is how the old state did it.
 345    Or we broke compatibility in the state, or we can't use struct tm
 346  */
 347
 348 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 349 {
 350     uint32_t *v = pv;
 351     *v = qemu_get_be16(f);
 352     return 0;
 353 }
 354
 355 static void put_unused(QEMUFile *f, void *pv, size_t size)
 356 {
 357     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 358     fprintf(stderr, "This functions shouldn't be called.\n");
 359 }
 360
 361 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 362     .name = "int32_as_uint16",
 363     .get  = get_uint32_as_uint16,
 364     .put  = put_unused,
 365 };
 366
 367 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 368     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 369
 370
 371 static bool is_version_1(void *opaque, int version_id)
 372 {
 373     return version_id == 1;
 374 }
 375
 376 static const VMStateDescription vmstate_fw_cfg = {
 377     .name = "fw_cfg",
 378     .version_id = 2,
 379     .minimum_version_id = 1,
 380     .minimum_version_id_old = 1,
 381     .fields      = (VMStateField []) {
 382         VMSTATE_UINT16(cur_entry, FWCfgState),
 383         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 384         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 385         VMSTATE_END_OF_LIST()
 386     }
 387 };
 388
 389 static void fw_cfg_add_bytes_read_callback(FWCfgState *s, uint16_t key,
 390                                            FWCfgReadCallback callback,
 391                                            void *callback_opaque,
 392                                            void *data, size_t len)
 393 {
 394     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 395
 396     key &= FW_CFG_ENTRY_MASK;
 397
 398     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 399
 400     s->entries[arch][key].data = data;
 401     s->entries[arch][key].len = (uint32_t)len;
 402     s->entries[arch][key].read_callback = callback;
 403     s->entries[arch][key].callback_opaque = callback_opaque;
 404 }
 405
 406 void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len)
 407 {
 408     fw_cfg_add_bytes_read_callback(s, key, NULL, NULL, data, len);
 409 }
 410
 411 void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
 412 {
 413     size_t sz = strlen(value) + 1;
 414
 415     return fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
 416 }
 417
 418 void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 419 {
 420     uint16_t *copy;
 421
 422     copy = g_malloc(sizeof(value));
 423     *copy = cpu_to_le16(value);
 424     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 425 }
 426
 427 void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 428 {
 429     uint32_t *copy;
 430
 431     copy = g_malloc(sizeof(value));
 432     *copy = cpu_to_le32(value);
 433     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 434 }
 435
 436 void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 437 {
 438     uint64_t *copy;
 439
 440     copy = g_malloc(sizeof(value));
 441     *copy = cpu_to_le64(value);
 442     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 443 }
 444
 445 void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
 446                          void *callback_opaque, void *data, size_t len)
 447 {
 448     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 449
 450     assert(key & FW_CFG_WRITE_CHANNEL);
 451
 452     key &= FW_CFG_ENTRY_MASK;
 453
 454     assert(key < FW_CFG_MAX_ENTRY && len <= UINT32_MAX);
 455
 456     s->entries[arch][key].data = data;
 457     s->entries[arch][key].len = (uint32_t)len;
 458     s->entries[arch][key].callback_opaque = callback_opaque;
 459     s->entries[arch][key].callback = callback;
 460 }
 461
 462 void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
 463                               FWCfgReadCallback callback, void *callback_opaque,
 464                               void *data, size_t len)
 465 {
 466     int i, index;
 467     size_t dsize;
 468
 469     if (!s->files) {
 470         dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 471         s->files = g_malloc0(dsize);
 472         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
 473     }
 474
 475     index = be32_to_cpu(s->files->count);
 476     assert(index < FW_CFG_FILE_SLOTS);
 477
 478     fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
 479                                    callback, callback_opaque, data, len);
 480
 481     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 482             filename);
 483     for (i = 0; i < index; i++) {
 484         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 485             trace_fw_cfg_add_file_dupe(s, s->files->f[index].name);
 486             return;
 487         }
 488     }
 489
 490     s->files->f[index].size   = cpu_to_be32(len);
 491     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 492     trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
 493
 494     s->files->count = cpu_to_be32(index+1);
 495 }
 496
 497 void fw_cfg_add_file(FWCfgState *s,  const char *filename,
 498                      void *data, size_t len)
 499 {
 500     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 501 }
 502
 503 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 504 {
 505     size_t len;
 506     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 507     char *bootindex = get_boot_devices_list(&len, false);
 508
 509     fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
 510 }
 511
 512 FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
 513                         hwaddr ctl_addr, hwaddr data_addr)
 514 {
 515     DeviceState *dev;
 516     SysBusDevice *d;
 517     FWCfgState *s;
 518
 519     dev = qdev_create(NULL, TYPE_FW_CFG);
 520     qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
 521     qdev_prop_set_uint32(dev, "data_iobase", data_port);
 522     d = SYS_BUS_DEVICE(dev);
 523
 524     s = FW_CFG(dev);
 525
 526     assert(!object_resolve_path(FW_CFG_PATH, NULL));
 527
 528     object_property_add_child(qdev_get_machine(), FW_CFG_NAME, OBJECT(s), NULL);
 529
 530     qdev_init_nofail(dev);
 531
 532     if (ctl_addr) {
 533         sysbus_mmio_map(d, 0, ctl_addr);
 534     }
 535     if (data_addr) {
 536         sysbus_mmio_map(d, 1, data_addr);
 537     }
 538     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
 539     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 540     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 541     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 542     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 543     fw_cfg_bootsplash(s);
 544     fw_cfg_reboot(s);
 545
 546     s->machine_ready.notify = fw_cfg_machine_ready;
 547     qemu_add_machine_init_done_notifier(&s->machine_ready);
 548
 549     return s;
 550 }
 551
 552 static void fw_cfg_initfn(Object *obj)
 553 {
 554     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 555     FWCfgState *s = FW_CFG(obj);
 556
 557     memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops, s,
 558                           "fwcfg.ctl", FW_CFG_SIZE);
 559     sysbus_init_mmio(sbd, &s->ctl_iomem);
 560     memory_region_init_io(&s->data_iomem, OBJECT(s), &fw_cfg_data_mem_ops, s,
 561                           "fwcfg.data", FW_CFG_DATA_SIZE);
 562     sysbus_init_mmio(sbd, &s->data_iomem);
 563     /* In case ctl and data overlap: */
 564     memory_region_init_io(&s->comb_iomem, OBJECT(s), &fw_cfg_comb_mem_ops, s,
 565                           "fwcfg", FW_CFG_SIZE);
 566 }
 567
 568 static void fw_cfg_realize(DeviceState *dev, Error **errp)
 569 {
 570     FWCfgState *s = FW_CFG(dev);
 571     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 572
 573
 574     if (s->ctl_iobase + 1 == s->data_iobase) {
 575         sysbus_add_io(sbd, s->ctl_iobase, &s->comb_iomem);
 576     } else {
 577         if (s->ctl_iobase) {
 578             sysbus_add_io(sbd, s->ctl_iobase, &s->ctl_iomem);
 579         }
 580         if (s->data_iobase) {
 581             sysbus_add_io(sbd, s->data_iobase, &s->data_iomem);
 582         }
 583     }
 584 }
 585
 586 static Property fw_cfg_properties[] = {
 587     DEFINE_PROP_UINT32("ctl_iobase", FWCfgState, ctl_iobase, -1),
 588     DEFINE_PROP_UINT32("data_iobase", FWCfgState, data_iobase, -1),
 589     DEFINE_PROP_END_OF_LIST(),
 590 };
 591
 592 FWCfgState *fw_cfg_find(void)
 593 {
 594     return FW_CFG(object_resolve_path(FW_CFG_PATH, NULL));
 595 }
 596
 597 static void fw_cfg_class_init(ObjectClass *klass, void *data)
 598 {
 599     DeviceClass *dc = DEVICE_CLASS(klass);
 600
 601     dc->realize = fw_cfg_realize;
 602     dc->reset = fw_cfg_reset;
 603     dc->vmsd = &vmstate_fw_cfg;
 604     dc->props = fw_cfg_properties;
 605 }
 606
 607 static const TypeInfo fw_cfg_info = {
 608     .name          = TYPE_FW_CFG,
 609     .parent        = TYPE_SYS_BUS_DEVICE,
 610     .instance_size = sizeof(FWCfgState),
 611     .instance_init = fw_cfg_initfn,
 612     .class_init    = fw_cfg_class_init,
 613 };
 614
 615 static void fw_cfg_register_types(void)
 616 {
 617     type_register_static(&fw_cfg_info);
 618 }
 619
 620 type_init(fw_cfg_register_types)