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         if (boot_splash_filedata != NULL) {
 191             g_free(boot_splash_filedata);
 192         }
 193         boot_splash_filedata = (uint8_t *)file_data;
 194         boot_splash_filedata_size = file_size;
 195
 196         /* insert data */
 197         if (file_type == JPG_FILE) {
 198             fw_cfg_add_file(s, "bootsplash.jpg",
 199                     boot_splash_filedata, boot_splash_filedata_size);
 200         } else {
 201             fw_cfg_add_file(s, "bootsplash.bmp",
 202                     boot_splash_filedata, boot_splash_filedata_size);
 203         }
 204         g_free(filename);
 205     }
 206 }
 207
 208 static void fw_cfg_reboot(FWCfgState *s)
 209 {
 210     int reboot_timeout = -1;
 211     char *p;
 212     const char *temp;
 213
 214     /* get user configuration */
 215     QemuOptsList *plist = qemu_find_opts("boot-opts");
 216     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 217     if (opts != NULL) {
 218         temp = qemu_opt_get(opts, "reboot-timeout");
 219         if (temp != NULL) {
 220             p = (char *)temp;
 221             reboot_timeout = strtol(p, (char **)&p, 10);
 222         }
 223     }
 224     /* validate the input */
 225     if (reboot_timeout > 0xffff) {
 226         error_report("reboot timeout is larger than 65535, force it to 65535.");
 227         reboot_timeout = 0xffff;
 228     }
 229     fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
 230 }
 231
 232 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 233 {
 234     /* nothing, write support removed in QEMU v2.4+ */
 235 }
 236
 237 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 238 {
 239     int ret;
 240
 241     s->cur_offset = 0;
 242     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 243         s->cur_entry = FW_CFG_INVALID;
 244         ret = 0;
 245     } else {
 246         s->cur_entry = key;
 247         ret = 1;
 248     }
 249
 250     trace_fw_cfg_select(s, key, ret);
 251     return ret;
 252 }
 253
 254 static uint8_t fw_cfg_read(FWCfgState *s)
 255 {
 256     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 257     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 258     uint8_t ret;
 259
 260     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 261         ret = 0;
 262     else {
 263         if (e->read_callback) {
 264             e->read_callback(e->callback_opaque, s->cur_offset);
 265         }
 266         ret = e->data[s->cur_offset++];
 267     }
 268
 269     trace_fw_cfg_read(s, ret);
 270     return ret;
 271 }
 272
 273 static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr,
 274                                      unsigned size)
 275 {
 276     FWCfgState *s = opaque;
 277     uint64_t value = 0;
 278     unsigned i;
 279
 280     for (i = 0; i < size; ++i) {
 281         value = (value << 8) | fw_cfg_read(s);
 282     }
 283     return value;
 284 }
 285
 286 static void fw_cfg_data_mem_write(void *opaque, hwaddr addr,
 287                                   uint64_t value, unsigned size)
 288 {
 289     FWCfgState *s = opaque;
 290     unsigned i = size;
 291
 292     do {
 293         fw_cfg_write(s, value >> (8 * --i));
 294     } while (i);
 295 }
 296
 297 static bool fw_cfg_data_mem_valid(void *opaque, hwaddr addr,
 298                                   unsigned size, bool is_write)
 299 {
 300     return addr == 0;
 301 }
 302
 303 static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr,
 304                                  uint64_t value, unsigned size)
 305 {
 306     fw_cfg_select(opaque, (uint16_t)value);
 307 }
 308
 309 static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr,
 310                                  unsigned size, bool is_write)
 311 {
 312     return is_write && size == 2;
 313 }
 314
 315 static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr,
 316                                  unsigned size)
 317 {
 318     return fw_cfg_read(opaque);
 319 }
 320
 321 static void fw_cfg_comb_write(void *opaque, hwaddr addr,
 322                               uint64_t value, unsigned size)
 323 {
 324     switch (size) {
 325     case 1:
 326         fw_cfg_write(opaque, (uint8_t)value);
 327         break;
 328     case 2:
 329         fw_cfg_select(opaque, (uint16_t)value);
 330         break;
 331     }
 332 }
 333
 334 static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
 335                                   unsigned size, bool is_write)
 336 {
 337     return (size == 1) || (is_write && size == 2);
 338 }
 339
 340 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
 341     .write = fw_cfg_ctl_mem_write,
 342     .endianness = DEVICE_BIG_ENDIAN,
 343     .valid.accepts = fw_cfg_ctl_mem_valid,
 344 };
 345
 346 static const MemoryRegionOps fw_cfg_data_mem_ops = {
 347     .read = fw_cfg_data_mem_read,
 348     .write = fw_cfg_data_mem_write,
 349     .endianness = DEVICE_BIG_ENDIAN,
 350     .valid = {
 351         .min_access_size = 1,
 352         .max_access_size = 1,
 353         .accepts = fw_cfg_data_mem_valid,
 354     },
 355 };
 356
 357 static const MemoryRegionOps fw_cfg_comb_mem_ops = {
 358     .read = fw_cfg_comb_read,
 359     .write = fw_cfg_comb_write,
 360     .endianness = DEVICE_LITTLE_ENDIAN,
 361     .valid.accepts = fw_cfg_comb_valid,
 362 };
 363
 364 static void fw_cfg_reset(DeviceState *d)
 365 {
 366     FWCfgState *s = FW_CFG(d);
 367
 368     fw_cfg_select(s, 0);
 369 }
 370
 371 /* Save restore 32 bit int as uint16_t
 372    This is a Big hack, but it is how the old state did it.
 373    Or we broke compatibility in the state, or we can't use struct tm
 374  */
 375
 376 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 377 {
 378     uint32_t *v = pv;
 379     *v = qemu_get_be16(f);
 380     return 0;
 381 }
 382
 383 static void put_unused(QEMUFile *f, void *pv, size_t size)
 384 {
 385     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 386     fprintf(stderr, "This functions shouldn't be called.\n");
 387 }
 388
 389 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 390     .name = "int32_as_uint16",
 391     .get  = get_uint32_as_uint16,
 392     .put  = put_unused,
 393 };
 394
 395 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 396     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 397
 398
 399 static bool is_version_1(void *opaque, int version_id)
 400 {
 401     return version_id == 1;
 402 }
 403
 404 static const VMStateDescription vmstate_fw_cfg = {
 405     .name = "fw_cfg",
 406     .version_id = 2,
 407     .minimum_version_id = 1,
 408     .fields = (VMStateField[]) {
 409         VMSTATE_UINT16(cur_entry, FWCfgState),
 410         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 411         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 412         VMSTATE_END_OF_LIST()
 413     }
 414 };
 415
 416 static void fw_cfg_add_bytes_read_callback(FWCfgState *s, uint16_t key,
 417                                            FWCfgReadCallback callback,
 418                                            void *callback_opaque,
 419                                            void *data, size_t len)
 420 {
 421     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 422
 423     key &= FW_CFG_ENTRY_MASK;
 424
 425     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 426     assert(s->entries[arch][key].data == NULL); /* avoid key conflict */
 427
 428     s->entries[arch][key].data = data;
 429     s->entries[arch][key].len = (uint32_t)len;
 430     s->entries[arch][key].read_callback = callback;
 431     s->entries[arch][key].callback_opaque = callback_opaque;
 432 }
 433
 434 static void *fw_cfg_modify_bytes_read(FWCfgState *s, uint16_t key,
 435                                               void *data, size_t len)
 436 {
 437     void *ptr;
 438     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 439
 440     key &= FW_CFG_ENTRY_MASK;
 441
 442     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 443
 444     /* return the old data to the function caller, avoid memory leak */
 445     ptr = s->entries[arch][key].data;
 446     s->entries[arch][key].data = data;
 447     s->entries[arch][key].len = len;
 448     s->entries[arch][key].callback_opaque = NULL;
 449
 450     return ptr;
 451 }
 452
 453 void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len)
 454 {
 455     fw_cfg_add_bytes_read_callback(s, key, NULL, NULL, data, len);
 456 }
 457
 458 void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
 459 {
 460     size_t sz = strlen(value) + 1;
 461
 462     fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
 463 }
 464
 465 void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 466 {
 467     uint16_t *copy;
 468
 469     copy = g_malloc(sizeof(value));
 470     *copy = cpu_to_le16(value);
 471     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 472 }
 473
 474 void fw_cfg_modify_i16(FWCfgState *s, uint16_t key, uint16_t value)
 475 {
 476     uint16_t *copy, *old;
 477
 478     copy = g_malloc(sizeof(value));
 479     *copy = cpu_to_le16(value);
 480     old = fw_cfg_modify_bytes_read(s, key, copy, sizeof(value));
 481     g_free(old);
 482 }
 483
 484 void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 485 {
 486     uint32_t *copy;
 487
 488     copy = g_malloc(sizeof(value));
 489     *copy = cpu_to_le32(value);
 490     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 491 }
 492
 493 void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 494 {
 495     uint64_t *copy;
 496
 497     copy = g_malloc(sizeof(value));
 498     *copy = cpu_to_le64(value);
 499     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 500 }
 501
 502 void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
 503                               FWCfgReadCallback callback, void *callback_opaque,
 504                               void *data, size_t len)
 505 {
 506     int i, index;
 507     size_t dsize;
 508
 509     if (!s->files) {
 510         dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 511         s->files = g_malloc0(dsize);
 512         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
 513     }
 514
 515     index = be32_to_cpu(s->files->count);
 516     assert(index < FW_CFG_FILE_SLOTS);
 517
 518     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 519             filename);
 520     for (i = 0; i < index; i++) {
 521         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 522             error_report("duplicate fw_cfg file name: %s",
 523                          s->files->f[index].name);
 524             exit(1);
 525         }
 526     }
 527
 528     fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
 529                                    callback, callback_opaque, data, len);
 530
 531     s->files->f[index].size   = cpu_to_be32(len);
 532     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 533     trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
 534
 535     s->files->count = cpu_to_be32(index+1);
 536 }
 537
 538 void fw_cfg_add_file(FWCfgState *s,  const char *filename,
 539                      void *data, size_t len)
 540 {
 541     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 542 }
 543
 544 void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
 545                         void *data, size_t len)
 546 {
 547     int i, index;
 548     void *ptr = NULL;
 549
 550     assert(s->files);
 551
 552     index = be32_to_cpu(s->files->count);
 553     assert(index < FW_CFG_FILE_SLOTS);
 554
 555     for (i = 0; i < index; i++) {
 556         if (strcmp(filename, s->files->f[i].name) == 0) {
 557             ptr = fw_cfg_modify_bytes_read(s, FW_CFG_FILE_FIRST + i,
 558                                            data, len);
 559             s->files->f[i].size   = cpu_to_be32(len);
 560             return ptr;
 561         }
 562     }
 563     /* add new one */
 564     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 565     return NULL;
 566 }
 567
 568 static void fw_cfg_machine_reset(void *opaque)
 569 {
 570     void *ptr;
 571     size_t len;
 572     FWCfgState *s = opaque;
 573     char *bootindex = get_boot_devices_list(&len, false);
 574
 575     ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
 576     g_free(ptr);
 577 }
 578
 579 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 580 {
 581     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 582     qemu_register_reset(fw_cfg_machine_reset, s);
 583 }
 584
 585
 586
 587 static void fw_cfg_init1(DeviceState *dev)
 588 {
 589     FWCfgState *s = FW_CFG(dev);
 590
 591     assert(!object_resolve_path(FW_CFG_PATH, NULL));
 592
 593     object_property_add_child(qdev_get_machine(), FW_CFG_NAME, OBJECT(s), NULL);
 594
 595     qdev_init_nofail(dev);
 596
 597     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
 598     fw_cfg_add_i32(s, FW_CFG_ID, 1);
 599     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 600     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 601     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 602     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 603     fw_cfg_bootsplash(s);
 604     fw_cfg_reboot(s);
 605
 606     s->machine_ready.notify = fw_cfg_machine_ready;
 607     qemu_add_machine_init_done_notifier(&s->machine_ready);
 608 }
 609
 610 FWCfgState *fw_cfg_init_io(uint32_t iobase)
 611 {
 612     DeviceState *dev;
 613
 614     dev = qdev_create(NULL, TYPE_FW_CFG_IO);
 615     qdev_prop_set_uint32(dev, "iobase", iobase);
 616     fw_cfg_init1(dev);
 617
 618     return FW_CFG(dev);
 619 }
 620
 621 FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, hwaddr data_addr,
 622                                  uint32_t data_width)
 623 {
 624     DeviceState *dev;
 625     SysBusDevice *sbd;
 626
 627     dev = qdev_create(NULL, TYPE_FW_CFG_MEM);
 628     qdev_prop_set_uint32(dev, "data_width", data_width);
 629
 630     fw_cfg_init1(dev);
 631
 632     sbd = SYS_BUS_DEVICE(dev);
 633     sysbus_mmio_map(sbd, 0, ctl_addr);
 634     sysbus_mmio_map(sbd, 1, data_addr);
 635
 636     return FW_CFG(dev);
 637 }
 638
 639 FWCfgState *fw_cfg_init_mem(hwaddr ctl_addr, hwaddr data_addr)
 640 {
 641     return fw_cfg_init_mem_wide(ctl_addr, data_addr,
 642                                 fw_cfg_data_mem_ops.valid.max_access_size);
 643 }
 644
 645
 646 FWCfgState *fw_cfg_find(void)
 647 {
 648     return FW_CFG(object_resolve_path(FW_CFG_PATH, NULL));
 649 }
 650
 651 static void fw_cfg_class_init(ObjectClass *klass, void *data)
 652 {
 653     DeviceClass *dc = DEVICE_CLASS(klass);
 654
 655     dc->reset = fw_cfg_reset;
 656     dc->vmsd = &vmstate_fw_cfg;
 657 }
 658
 659 static const TypeInfo fw_cfg_info = {
 660     .name          = TYPE_FW_CFG,
 661     .parent        = TYPE_SYS_BUS_DEVICE,
 662     .instance_size = sizeof(FWCfgState),
 663     .class_init    = fw_cfg_class_init,
 664 };
 665
 666
 667 static Property fw_cfg_io_properties[] = {
 668     DEFINE_PROP_UINT32("iobase", FWCfgIoState, iobase, -1),
 669     DEFINE_PROP_END_OF_LIST(),
 670 };
 671
 672 static void fw_cfg_io_realize(DeviceState *dev, Error **errp)
 673 {
 674     FWCfgIoState *s = FW_CFG_IO(dev);
 675     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 676
 677     memory_region_init_io(&s->comb_iomem, OBJECT(s), &fw_cfg_comb_mem_ops,
 678                           FW_CFG(s), "fwcfg", FW_CFG_SIZE);
 679     sysbus_add_io(sbd, s->iobase, &s->comb_iomem);
 680 }
 681
 682 static void fw_cfg_io_class_init(ObjectClass *klass, void *data)
 683 {
 684     DeviceClass *dc = DEVICE_CLASS(klass);
 685
 686     dc->realize = fw_cfg_io_realize;
 687     dc->props = fw_cfg_io_properties;
 688 }
 689
 690 static const TypeInfo fw_cfg_io_info = {
 691     .name          = TYPE_FW_CFG_IO,
 692     .parent        = TYPE_FW_CFG,
 693     .instance_size = sizeof(FWCfgIoState),
 694     .class_init    = fw_cfg_io_class_init,
 695 };
 696
 697
 698 static Property fw_cfg_mem_properties[] = {
 699     DEFINE_PROP_UINT32("data_width", FWCfgMemState, data_width, -1),
 700     DEFINE_PROP_END_OF_LIST(),
 701 };
 702
 703 static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
 704 {
 705     FWCfgMemState *s = FW_CFG_MEM(dev);
 706     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 707     const MemoryRegionOps *data_ops = &fw_cfg_data_mem_ops;
 708
 709     memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops,
 710                           FW_CFG(s), "fwcfg.ctl", FW_CFG_SIZE);
 711     sysbus_init_mmio(sbd, &s->ctl_iomem);
 712
 713     if (s->data_width > data_ops->valid.max_access_size) {
 714         /* memberwise copy because the "old_mmio" member is const */
 715         s->wide_data_ops.read       = data_ops->read;
 716         s->wide_data_ops.write      = data_ops->write;
 717         s->wide_data_ops.endianness = data_ops->endianness;
 718         s->wide_data_ops.valid      = data_ops->valid;
 719         s->wide_data_ops.impl       = data_ops->impl;
 720
 721         s->wide_data_ops.valid.max_access_size = s->data_width;
 722         s->wide_data_ops.impl.max_access_size  = s->data_width;
 723         data_ops = &s->wide_data_ops;
 724     }
 725     memory_region_init_io(&s->data_iomem, OBJECT(s), data_ops, FW_CFG(s),
 726                           "fwcfg.data", data_ops->valid.max_access_size);
 727     sysbus_init_mmio(sbd, &s->data_iomem);
 728 }
 729
 730 static void fw_cfg_mem_class_init(ObjectClass *klass, void *data)
 731 {
 732     DeviceClass *dc = DEVICE_CLASS(klass);
 733
 734     dc->realize = fw_cfg_mem_realize;
 735     dc->props = fw_cfg_mem_properties;
 736 }
 737
 738 static const TypeInfo fw_cfg_mem_info = {
 739     .name          = TYPE_FW_CFG_MEM,
 740     .parent        = TYPE_FW_CFG,
 741     .instance_size = sizeof(FWCfgMemState),
 742     .class_init    = fw_cfg_mem_class_init,
 743 };
 744
 745
 746 static void fw_cfg_register_types(void)
 747 {
 748     type_register_static(&fw_cfg_info);
 749     type_register_static(&fw_cfg_io_info);
 750     type_register_static(&fw_cfg_mem_info);
 751 }
 752
 753 type_init(fw_cfg_register_types)