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_NAME "fw_cfg"
  35 #define FW_CFG_PATH "/machine/" FW_CFG_NAME
  36
  37 #define TYPE_FW_CFG     "fw_cfg"
  38 #define TYPE_FW_CFG_IO  "fw_cfg_io"
  39 #define TYPE_FW_CFG_MEM "fw_cfg_mem"
  40
  41 #define FW_CFG(obj)     OBJECT_CHECK(FWCfgState,    (obj), TYPE_FW_CFG)
  42 #define FW_CFG_IO(obj)  OBJECT_CHECK(FWCfgIoState,  (obj), TYPE_FW_CFG_IO)
  43 #define FW_CFG_MEM(obj) OBJECT_CHECK(FWCfgMemState, (obj), TYPE_FW_CFG_MEM)
  44
  45 typedef struct FWCfgEntry {
  46     uint32_t len;
  47     uint8_t *data;
  48     void *callback_opaque;
  49     FWCfgReadCallback read_callback;
  50 } FWCfgEntry;
  51
  52 struct FWCfgState {
  53     /*< private >*/
  54     SysBusDevice parent_obj;
  55     /*< public >*/
  56
  57     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
  58     FWCfgFiles *files;
  59     uint16_t cur_entry;
  60     uint32_t cur_offset;
  61     Notifier machine_ready;
  62 };
  63
  64 struct FWCfgIoState {
  65     /*< private >*/
  66     FWCfgState parent_obj;
  67     /*< public >*/
  68
  69     MemoryRegion comb_iomem;
  70     uint32_t iobase;
  71 };
  72
  73 struct FWCfgMemState {
  74     /*< private >*/
  75     FWCfgState parent_obj;
  76     /*< public >*/
  77
  78     MemoryRegion ctl_iomem, data_iomem;
  79     uint32_t data_width;
  80     MemoryRegionOps wide_data_ops;
  81 };
  82
  83 #define JPG_FILE 0
  84 #define BMP_FILE 1
  85
  86 static char *read_splashfile(char *filename, gsize *file_sizep,
  87                              int *file_typep)
  88 {
  89     GError *err = NULL;
  90     gboolean res;
  91     gchar *content;
  92     int file_type;
  93     unsigned int filehead;
  94     int bmp_bpp;
  95
  96     res = g_file_get_contents(filename, &content, file_sizep, &err);
  97     if (res == FALSE) {
  98         error_report("failed to read splash file '%s'", filename);
  99         g_error_free(err);
 100         return NULL;
 101     }
 102
 103     /* check file size */
 104     if (*file_sizep < 30) {
 105         goto error;
 106     }
 107
 108     /* check magic ID */
 109     filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
 110     if (filehead == 0xd8ff) {
 111         file_type = JPG_FILE;
 112     } else if (filehead == 0x4d42) {
 113         file_type = BMP_FILE;
 114     } else {
 115         goto error;
 116     }
 117
 118     /* check BMP bpp */
 119     if (file_type == BMP_FILE) {
 120         bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
 121         if (bmp_bpp != 24) {
 122             goto error;
 123         }
 124     }
 125
 126     /* return values */
 127     *file_typep = file_type;
 128
 129     return content;
 130
 131 error:
 132     error_report("splash file '%s' format not recognized; must be JPEG "
 133                  "or 24 bit BMP", filename);
 134     g_free(content);
 135     return NULL;
 136 }
 137
 138 static void fw_cfg_bootsplash(FWCfgState *s)
 139 {
 140     int boot_splash_time = -1;
 141     const char *boot_splash_filename = NULL;
 142     char *p;
 143     char *filename, *file_data;
 144     gsize file_size;
 145     int file_type;
 146     const char *temp;
 147
 148     /* get user configuration */
 149     QemuOptsList *plist = qemu_find_opts("boot-opts");
 150     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 151     if (opts != NULL) {
 152         temp = qemu_opt_get(opts, "splash");
 153         if (temp != NULL) {
 154             boot_splash_filename = temp;
 155         }
 156         temp = qemu_opt_get(opts, "splash-time");
 157         if (temp != NULL) {
 158             p = (char *)temp;
 159             boot_splash_time = strtol(p, (char **)&p, 10);
 160         }
 161     }
 162
 163     /* insert splash time if user configurated */
 164     if (boot_splash_time >= 0) {
 165         /* validate the input */
 166         if (boot_splash_time > 0xffff) {
 167             error_report("splash time is big than 65535, force it to 65535.");
 168             boot_splash_time = 0xffff;
 169         }
 170         /* use little endian format */
 171         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 172         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 173         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 174     }
 175
 176     /* insert splash file if user configurated */
 177     if (boot_splash_filename != NULL) {
 178         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 179         if (filename == NULL) {
 180             error_report("failed to find file '%s'.", boot_splash_filename);
 181             return;
 182         }
 183
 184         /* loading file data */
 185         file_data = read_splashfile(filename, &file_size, &file_type);
 186         if (file_data == NULL) {
 187             g_free(filename);
 188             return;
 189         }
 190         g_free(boot_splash_filedata);
 191         boot_splash_filedata = (uint8_t *)file_data;
 192         boot_splash_filedata_size = file_size;
 193
 194         /* insert data */
 195         if (file_type == JPG_FILE) {
 196             fw_cfg_add_file(s, "bootsplash.jpg",
 197                     boot_splash_filedata, boot_splash_filedata_size);
 198         } else {
 199             fw_cfg_add_file(s, "bootsplash.bmp",
 200                     boot_splash_filedata, boot_splash_filedata_size);
 201         }
 202         g_free(filename);
 203     }
 204 }
 205
 206 static void fw_cfg_reboot(FWCfgState *s)
 207 {
 208     int reboot_timeout = -1;
 209     char *p;
 210     const char *temp;
 211
 212     /* get user configuration */
 213     QemuOptsList *plist = qemu_find_opts("boot-opts");
 214     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 215     if (opts != NULL) {
 216         temp = qemu_opt_get(opts, "reboot-timeout");
 217         if (temp != NULL) {
 218             p = (char *)temp;
 219             reboot_timeout = strtol(p, (char **)&p, 10);
 220         }
 221     }
 222     /* validate the input */
 223     if (reboot_timeout > 0xffff) {
 224         error_report("reboot timeout is larger than 65535, force it to 65535.");
 225         reboot_timeout = 0xffff;
 226     }
 227     fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
 228 }
 229
 230 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 231 {
 232     /* nothing, write support removed in QEMU v2.4+ */
 233 }
 234
 235 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 236 {
 237     int ret;
 238
 239     s->cur_offset = 0;
 240     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 241         s->cur_entry = FW_CFG_INVALID;
 242         ret = 0;
 243     } else {
 244         s->cur_entry = key;
 245         ret = 1;
 246     }
 247
 248     trace_fw_cfg_select(s, key, ret);
 249     return ret;
 250 }
 251
 252 static uint8_t fw_cfg_read(FWCfgState *s)
 253 {
 254     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 255     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 256     uint8_t ret;
 257
 258     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 259         ret = 0;
 260     else {
 261         if (e->read_callback) {
 262             e->read_callback(e->callback_opaque, s->cur_offset);
 263         }
 264         ret = e->data[s->cur_offset++];
 265     }
 266
 267     trace_fw_cfg_read(s, ret);
 268     return ret;
 269 }
 270
 271 static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr,
 272                                      unsigned size)
 273 {
 274     FWCfgState *s = opaque;
 275     uint64_t value = 0;
 276     unsigned i;
 277
 278     for (i = 0; i < size; ++i) {
 279         value = (value << 8) | fw_cfg_read(s);
 280     }
 281     return value;
 282 }
 283
 284 static void fw_cfg_data_mem_write(void *opaque, hwaddr addr,
 285                                   uint64_t value, unsigned size)
 286 {
 287     FWCfgState *s = opaque;
 288     unsigned i = size;
 289
 290     do {
 291         fw_cfg_write(s, value >> (8 * --i));
 292     } while (i);
 293 }
 294
 295 static bool fw_cfg_data_mem_valid(void *opaque, hwaddr addr,
 296                                   unsigned size, bool is_write)
 297 {
 298     return addr == 0;
 299 }
 300
 301 static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr,
 302                                  uint64_t value, unsigned size)
 303 {
 304     fw_cfg_select(opaque, (uint16_t)value);
 305 }
 306
 307 static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr,
 308                                  unsigned size, bool is_write)
 309 {
 310     return is_write && size == 2;
 311 }
 312
 313 static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr,
 314                                  unsigned size)
 315 {
 316     return fw_cfg_read(opaque);
 317 }
 318
 319 static void fw_cfg_comb_write(void *opaque, hwaddr addr,
 320                               uint64_t value, unsigned size)
 321 {
 322     switch (size) {
 323     case 1:
 324         fw_cfg_write(opaque, (uint8_t)value);
 325         break;
 326     case 2:
 327         fw_cfg_select(opaque, (uint16_t)value);
 328         break;
 329     }
 330 }
 331
 332 static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
 333                                   unsigned size, bool is_write)
 334 {
 335     return (size == 1) || (is_write && size == 2);
 336 }
 337
 338 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
 339     .write = fw_cfg_ctl_mem_write,
 340     .endianness = DEVICE_BIG_ENDIAN,
 341     .valid.accepts = fw_cfg_ctl_mem_valid,
 342 };
 343
 344 static const MemoryRegionOps fw_cfg_data_mem_ops = {
 345     .read = fw_cfg_data_mem_read,
 346     .write = fw_cfg_data_mem_write,
 347     .endianness = DEVICE_BIG_ENDIAN,
 348     .valid = {
 349         .min_access_size = 1,
 350         .max_access_size = 1,
 351         .accepts = fw_cfg_data_mem_valid,
 352     },
 353 };
 354
 355 static const MemoryRegionOps fw_cfg_comb_mem_ops = {
 356     .read = fw_cfg_comb_read,
 357     .write = fw_cfg_comb_write,
 358     .endianness = DEVICE_LITTLE_ENDIAN,
 359     .valid.accepts = fw_cfg_comb_valid,
 360 };
 361
 362 static void fw_cfg_reset(DeviceState *d)
 363 {
 364     FWCfgState *s = FW_CFG(d);
 365
 366     fw_cfg_select(s, 0);
 367 }
 368
 369 /* Save restore 32 bit int as uint16_t
 370    This is a Big hack, but it is how the old state did it.
 371    Or we broke compatibility in the state, or we can't use struct tm
 372  */
 373
 374 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 375 {
 376     uint32_t *v = pv;
 377     *v = qemu_get_be16(f);
 378     return 0;
 379 }
 380
 381 static void put_unused(QEMUFile *f, void *pv, size_t size)
 382 {
 383     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 384     fprintf(stderr, "This functions shouldn't be called.\n");
 385 }
 386
 387 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 388     .name = "int32_as_uint16",
 389     .get  = get_uint32_as_uint16,
 390     .put  = put_unused,
 391 };
 392
 393 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 394     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 395
 396
 397 static bool is_version_1(void *opaque, int version_id)
 398 {
 399     return version_id == 1;
 400 }
 401
 402 static const VMStateDescription vmstate_fw_cfg = {
 403     .name = "fw_cfg",
 404     .version_id = 2,
 405     .minimum_version_id = 1,
 406     .fields = (VMStateField[]) {
 407         VMSTATE_UINT16(cur_entry, FWCfgState),
 408         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 409         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 410         VMSTATE_END_OF_LIST()
 411     }
 412 };
 413
 414 static void fw_cfg_add_bytes_read_callback(FWCfgState *s, uint16_t key,
 415                                            FWCfgReadCallback callback,
 416                                            void *callback_opaque,
 417                                            void *data, size_t len)
 418 {
 419     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 420
 421     key &= FW_CFG_ENTRY_MASK;
 422
 423     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 424     assert(s->entries[arch][key].data == NULL); /* avoid key conflict */
 425
 426     s->entries[arch][key].data = data;
 427     s->entries[arch][key].len = (uint32_t)len;
 428     s->entries[arch][key].read_callback = callback;
 429     s->entries[arch][key].callback_opaque = callback_opaque;
 430 }
 431
 432 static void *fw_cfg_modify_bytes_read(FWCfgState *s, uint16_t key,
 433                                               void *data, size_t len)
 434 {
 435     void *ptr;
 436     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 437
 438     key &= FW_CFG_ENTRY_MASK;
 439
 440     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 441
 442     /* return the old data to the function caller, avoid memory leak */
 443     ptr = s->entries[arch][key].data;
 444     s->entries[arch][key].data = data;
 445     s->entries[arch][key].len = len;
 446     s->entries[arch][key].callback_opaque = NULL;
 447
 448     return ptr;
 449 }
 450
 451 void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len)
 452 {
 453     fw_cfg_add_bytes_read_callback(s, key, NULL, NULL, data, len);
 454 }
 455
 456 void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
 457 {
 458     size_t sz = strlen(value) + 1;
 459
 460     fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
 461 }
 462
 463 void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 464 {
 465     uint16_t *copy;
 466
 467     copy = g_malloc(sizeof(value));
 468     *copy = cpu_to_le16(value);
 469     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 470 }
 471
 472 void fw_cfg_modify_i16(FWCfgState *s, uint16_t key, uint16_t value)
 473 {
 474     uint16_t *copy, *old;
 475
 476     copy = g_malloc(sizeof(value));
 477     *copy = cpu_to_le16(value);
 478     old = fw_cfg_modify_bytes_read(s, key, copy, sizeof(value));
 479     g_free(old);
 480 }
 481
 482 void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 483 {
 484     uint32_t *copy;
 485
 486     copy = g_malloc(sizeof(value));
 487     *copy = cpu_to_le32(value);
 488     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 489 }
 490
 491 void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 492 {
 493     uint64_t *copy;
 494
 495     copy = g_malloc(sizeof(value));
 496     *copy = cpu_to_le64(value);
 497     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 498 }
 499
 500 void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
 501                               FWCfgReadCallback callback, void *callback_opaque,
 502                               void *data, size_t len)
 503 {
 504     int i, index;
 505     size_t dsize;
 506
 507     if (!s->files) {
 508         dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 509         s->files = g_malloc0(dsize);
 510         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
 511     }
 512
 513     index = be32_to_cpu(s->files->count);
 514     assert(index < FW_CFG_FILE_SLOTS);
 515
 516     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 517             filename);
 518     for (i = 0; i < index; i++) {
 519         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 520             error_report("duplicate fw_cfg file name: %s",
 521                          s->files->f[index].name);
 522             exit(1);
 523         }
 524     }
 525
 526     fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
 527                                    callback, callback_opaque, data, len);
 528
 529     s->files->f[index].size   = cpu_to_be32(len);
 530     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 531     trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
 532
 533     s->files->count = cpu_to_be32(index+1);
 534 }
 535
 536 void fw_cfg_add_file(FWCfgState *s,  const char *filename,
 537                      void *data, size_t len)
 538 {
 539     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 540 }
 541
 542 void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
 543                         void *data, size_t len)
 544 {
 545     int i, index;
 546     void *ptr = NULL;
 547
 548     assert(s->files);
 549
 550     index = be32_to_cpu(s->files->count);
 551     assert(index < FW_CFG_FILE_SLOTS);
 552
 553     for (i = 0; i < index; i++) {
 554         if (strcmp(filename, s->files->f[i].name) == 0) {
 555             ptr = fw_cfg_modify_bytes_read(s, FW_CFG_FILE_FIRST + i,
 556                                            data, len);
 557             s->files->f[i].size   = cpu_to_be32(len);
 558             return ptr;
 559         }
 560     }
 561     /* add new one */
 562     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 563     return NULL;
 564 }
 565
 566 static void fw_cfg_machine_reset(void *opaque)
 567 {
 568     void *ptr;
 569     size_t len;
 570     FWCfgState *s = opaque;
 571     char *bootindex = get_boot_devices_list(&len, false);
 572
 573     ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
 574     g_free(ptr);
 575 }
 576
 577 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 578 {
 579     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 580     qemu_register_reset(fw_cfg_machine_reset, s);
 581 }
 582
 583
 584
 585 static void fw_cfg_init1(DeviceState *dev)
 586 {
 587     FWCfgState *s = FW_CFG(dev);
 588
 589     assert(!object_resolve_path(FW_CFG_PATH, NULL));
 590
 591     object_property_add_child(qdev_get_machine(), FW_CFG_NAME, OBJECT(s), NULL);
 592
 593     qdev_init_nofail(dev);
 594
 595     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
 596     fw_cfg_add_i32(s, FW_CFG_ID, 1);
 597     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 598     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 599     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 600     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 601     fw_cfg_bootsplash(s);
 602     fw_cfg_reboot(s);
 603
 604     s->machine_ready.notify = fw_cfg_machine_ready;
 605     qemu_add_machine_init_done_notifier(&s->machine_ready);
 606 }
 607
 608 FWCfgState *fw_cfg_init_io(uint32_t iobase)
 609 {
 610     DeviceState *dev;
 611
 612     dev = qdev_create(NULL, TYPE_FW_CFG_IO);
 613     qdev_prop_set_uint32(dev, "iobase", iobase);
 614     fw_cfg_init1(dev);
 615
 616     return FW_CFG(dev);
 617 }
 618
 619 FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, hwaddr data_addr,
 620                                  uint32_t data_width)
 621 {
 622     DeviceState *dev;
 623     SysBusDevice *sbd;
 624
 625     dev = qdev_create(NULL, TYPE_FW_CFG_MEM);
 626     qdev_prop_set_uint32(dev, "data_width", data_width);
 627
 628     fw_cfg_init1(dev);
 629
 630     sbd = SYS_BUS_DEVICE(dev);
 631     sysbus_mmio_map(sbd, 0, ctl_addr);
 632     sysbus_mmio_map(sbd, 1, data_addr);
 633
 634     return FW_CFG(dev);
 635 }
 636
 637 FWCfgState *fw_cfg_init_mem(hwaddr ctl_addr, hwaddr data_addr)
 638 {
 639     return fw_cfg_init_mem_wide(ctl_addr, data_addr,
 640                                 fw_cfg_data_mem_ops.valid.max_access_size);
 641 }
 642
 643
 644 FWCfgState *fw_cfg_find(void)
 645 {
 646     return FW_CFG(object_resolve_path(FW_CFG_PATH, NULL));
 647 }
 648
 649 static void fw_cfg_class_init(ObjectClass *klass, void *data)
 650 {
 651     DeviceClass *dc = DEVICE_CLASS(klass);
 652
 653     dc->reset = fw_cfg_reset;
 654     dc->vmsd = &vmstate_fw_cfg;
 655 }
 656
 657 static const TypeInfo fw_cfg_info = {
 658     .name          = TYPE_FW_CFG,
 659     .parent        = TYPE_SYS_BUS_DEVICE,
 660     .instance_size = sizeof(FWCfgState),
 661     .class_init    = fw_cfg_class_init,
 662 };
 663
 664
 665 static Property fw_cfg_io_properties[] = {
 666     DEFINE_PROP_UINT32("iobase", FWCfgIoState, iobase, -1),
 667     DEFINE_PROP_END_OF_LIST(),
 668 };
 669
 670 static void fw_cfg_io_realize(DeviceState *dev, Error **errp)
 671 {
 672     FWCfgIoState *s = FW_CFG_IO(dev);
 673     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 674
 675     memory_region_init_io(&s->comb_iomem, OBJECT(s), &fw_cfg_comb_mem_ops,
 676                           FW_CFG(s), "fwcfg", FW_CFG_SIZE);
 677     sysbus_add_io(sbd, s->iobase, &s->comb_iomem);
 678 }
 679
 680 static void fw_cfg_io_class_init(ObjectClass *klass, void *data)
 681 {
 682     DeviceClass *dc = DEVICE_CLASS(klass);
 683
 684     dc->realize = fw_cfg_io_realize;
 685     dc->props = fw_cfg_io_properties;
 686 }
 687
 688 static const TypeInfo fw_cfg_io_info = {
 689     .name          = TYPE_FW_CFG_IO,
 690     .parent        = TYPE_FW_CFG,
 691     .instance_size = sizeof(FWCfgIoState),
 692     .class_init    = fw_cfg_io_class_init,
 693 };
 694
 695
 696 static Property fw_cfg_mem_properties[] = {
 697     DEFINE_PROP_UINT32("data_width", FWCfgMemState, data_width, -1),
 698     DEFINE_PROP_END_OF_LIST(),
 699 };
 700
 701 static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
 702 {
 703     FWCfgMemState *s = FW_CFG_MEM(dev);
 704     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 705     const MemoryRegionOps *data_ops = &fw_cfg_data_mem_ops;
 706
 707     memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops,
 708                           FW_CFG(s), "fwcfg.ctl", FW_CFG_SIZE);
 709     sysbus_init_mmio(sbd, &s->ctl_iomem);
 710
 711     if (s->data_width > data_ops->valid.max_access_size) {
 712         /* memberwise copy because the "old_mmio" member is const */
 713         s->wide_data_ops.read       = data_ops->read;
 714         s->wide_data_ops.write      = data_ops->write;
 715         s->wide_data_ops.endianness = data_ops->endianness;
 716         s->wide_data_ops.valid      = data_ops->valid;
 717         s->wide_data_ops.impl       = data_ops->impl;
 718
 719         s->wide_data_ops.valid.max_access_size = s->data_width;
 720         s->wide_data_ops.impl.max_access_size  = s->data_width;
 721         data_ops = &s->wide_data_ops;
 722     }
 723     memory_region_init_io(&s->data_iomem, OBJECT(s), data_ops, FW_CFG(s),
 724                           "fwcfg.data", data_ops->valid.max_access_size);
 725     sysbus_init_mmio(sbd, &s->data_iomem);
 726 }
 727
 728 static void fw_cfg_mem_class_init(ObjectClass *klass, void *data)
 729 {
 730     DeviceClass *dc = DEVICE_CLASS(klass);
 731
 732     dc->realize = fw_cfg_mem_realize;
 733     dc->props = fw_cfg_mem_properties;
 734 }
 735
 736 static const TypeInfo fw_cfg_mem_info = {
 737     .name          = TYPE_FW_CFG_MEM,
 738     .parent        = TYPE_FW_CFG,
 739     .instance_size = sizeof(FWCfgMemState),
 740     .class_init    = fw_cfg_mem_class_init,
 741 };
 742
 743
 744 static void fw_cfg_register_types(void)
 745 {
 746     type_register_static(&fw_cfg_info);
 747     type_register_static(&fw_cfg_io_info);
 748     type_register_static(&fw_cfg_mem_info);
 749 }
 750
 751 type_init(fw_cfg_register_types)