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     FWCfgCallback callback;
  50     FWCfgReadCallback read_callback;
  51 } FWCfgEntry;
  52
  53 struct FWCfgState {
  54     /*< private >*/
  55     SysBusDevice parent_obj;
  56     /*< public >*/
  57
  58     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
  59     FWCfgFiles *files;
  60     uint16_t cur_entry;
  61     uint32_t cur_offset;
  62     Notifier machine_ready;
  63 };
  64
  65 struct FWCfgIoState {
  66     /*< private >*/
  67     FWCfgState parent_obj;
  68     /*< public >*/
  69
  70     MemoryRegion comb_iomem;
  71     uint32_t iobase;
  72 };
  73
  74 struct FWCfgMemState {
  75     /*< private >*/
  76     FWCfgState parent_obj;
  77     /*< public >*/
  78
  79     MemoryRegion ctl_iomem, data_iomem;
  80     uint32_t data_width;
  81     MemoryRegionOps wide_data_ops;
  82 };
  83
  84 #define JPG_FILE 0
  85 #define BMP_FILE 1
  86
  87 static char *read_splashfile(char *filename, gsize *file_sizep,
  88                              int *file_typep)
  89 {
  90     GError *err = NULL;
  91     gboolean res;
  92     gchar *content;
  93     int file_type;
  94     unsigned int filehead;
  95     int bmp_bpp;
  96
  97     res = g_file_get_contents(filename, &content, file_sizep, &err);
  98     if (res == FALSE) {
  99         error_report("failed to read splash file '%s'", filename);
 100         g_error_free(err);
 101         return NULL;
 102     }
 103
 104     /* check file size */
 105     if (*file_sizep < 30) {
 106         goto error;
 107     }
 108
 109     /* check magic ID */
 110     filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
 111     if (filehead == 0xd8ff) {
 112         file_type = JPG_FILE;
 113     } else if (filehead == 0x4d42) {
 114         file_type = BMP_FILE;
 115     } else {
 116         goto error;
 117     }
 118
 119     /* check BMP bpp */
 120     if (file_type == BMP_FILE) {
 121         bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
 122         if (bmp_bpp != 24) {
 123             goto error;
 124         }
 125     }
 126
 127     /* return values */
 128     *file_typep = file_type;
 129
 130     return content;
 131
 132 error:
 133     error_report("splash file '%s' format not recognized; must be JPEG "
 134                  "or 24 bit BMP", filename);
 135     g_free(content);
 136     return NULL;
 137 }
 138
 139 static void fw_cfg_bootsplash(FWCfgState *s)
 140 {
 141     int boot_splash_time = -1;
 142     const char *boot_splash_filename = NULL;
 143     char *p;
 144     char *filename, *file_data;
 145     gsize file_size;
 146     int file_type;
 147     const char *temp;
 148
 149     /* get user configuration */
 150     QemuOptsList *plist = qemu_find_opts("boot-opts");
 151     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 152     if (opts != NULL) {
 153         temp = qemu_opt_get(opts, "splash");
 154         if (temp != NULL) {
 155             boot_splash_filename = temp;
 156         }
 157         temp = qemu_opt_get(opts, "splash-time");
 158         if (temp != NULL) {
 159             p = (char *)temp;
 160             boot_splash_time = strtol(p, (char **)&p, 10);
 161         }
 162     }
 163
 164     /* insert splash time if user configurated */
 165     if (boot_splash_time >= 0) {
 166         /* validate the input */
 167         if (boot_splash_time > 0xffff) {
 168             error_report("splash time is big than 65535, force it to 65535.");
 169             boot_splash_time = 0xffff;
 170         }
 171         /* use little endian format */
 172         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 173         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 174         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 175     }
 176
 177     /* insert splash file if user configurated */
 178     if (boot_splash_filename != NULL) {
 179         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 180         if (filename == NULL) {
 181             error_report("failed to find file '%s'.", boot_splash_filename);
 182             return;
 183         }
 184
 185         /* loading file data */
 186         file_data = read_splashfile(filename, &file_size, &file_type);
 187         if (file_data == NULL) {
 188             g_free(filename);
 189             return;
 190         }
 191         if (boot_splash_filedata != NULL) {
 192             g_free(boot_splash_filedata);
 193         }
 194         boot_splash_filedata = (uint8_t *)file_data;
 195         boot_splash_filedata_size = file_size;
 196
 197         /* insert data */
 198         if (file_type == JPG_FILE) {
 199             fw_cfg_add_file(s, "bootsplash.jpg",
 200                     boot_splash_filedata, boot_splash_filedata_size);
 201         } else {
 202             fw_cfg_add_file(s, "bootsplash.bmp",
 203                     boot_splash_filedata, boot_splash_filedata_size);
 204         }
 205         g_free(filename);
 206     }
 207 }
 208
 209 static void fw_cfg_reboot(FWCfgState *s)
 210 {
 211     int reboot_timeout = -1;
 212     char *p;
 213     const char *temp;
 214
 215     /* get user configuration */
 216     QemuOptsList *plist = qemu_find_opts("boot-opts");
 217     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 218     if (opts != NULL) {
 219         temp = qemu_opt_get(opts, "reboot-timeout");
 220         if (temp != NULL) {
 221             p = (char *)temp;
 222             reboot_timeout = strtol(p, (char **)&p, 10);
 223         }
 224     }
 225     /* validate the input */
 226     if (reboot_timeout > 0xffff) {
 227         error_report("reboot timeout is larger than 65535, force it to 65535.");
 228         reboot_timeout = 0xffff;
 229     }
 230     fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
 231 }
 232
 233 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 234 {
 235     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 236     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 237
 238     trace_fw_cfg_write(s, value);
 239
 240     if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
 241         s->cur_offset < e->len) {
 242         e->data[s->cur_offset++] = value;
 243         if (s->cur_offset == e->len) {
 244             e->callback(e->callback_opaque, e->data);
 245             s->cur_offset = 0;
 246         }
 247     }
 248 }
 249
 250 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 251 {
 252     int ret;
 253
 254     s->cur_offset = 0;
 255     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 256         s->cur_entry = FW_CFG_INVALID;
 257         ret = 0;
 258     } else {
 259         s->cur_entry = key;
 260         ret = 1;
 261     }
 262
 263     trace_fw_cfg_select(s, key, ret);
 264     return ret;
 265 }
 266
 267 static uint8_t fw_cfg_read(FWCfgState *s)
 268 {
 269     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 270     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 271     uint8_t ret;
 272
 273     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 274         ret = 0;
 275     else {
 276         if (e->read_callback) {
 277             e->read_callback(e->callback_opaque, s->cur_offset);
 278         }
 279         ret = e->data[s->cur_offset++];
 280     }
 281
 282     trace_fw_cfg_read(s, ret);
 283     return ret;
 284 }
 285
 286 static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr,
 287                                      unsigned size)
 288 {
 289     FWCfgState *s = opaque;
 290     uint64_t value = 0;
 291     unsigned i;
 292
 293     for (i = 0; i < size; ++i) {
 294         value = (value << 8) | fw_cfg_read(s);
 295     }
 296     return value;
 297 }
 298
 299 static void fw_cfg_data_mem_write(void *opaque, hwaddr addr,
 300                                   uint64_t value, unsigned size)
 301 {
 302     FWCfgState *s = opaque;
 303     unsigned i = size;
 304
 305     do {
 306         fw_cfg_write(s, value >> (8 * --i));
 307     } while (i);
 308 }
 309
 310 static bool fw_cfg_data_mem_valid(void *opaque, hwaddr addr,
 311                                   unsigned size, bool is_write)
 312 {
 313     return addr == 0;
 314 }
 315
 316 static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr,
 317                                  uint64_t value, unsigned size)
 318 {
 319     fw_cfg_select(opaque, (uint16_t)value);
 320 }
 321
 322 static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr,
 323                                  unsigned size, bool is_write)
 324 {
 325     return is_write && size == 2;
 326 }
 327
 328 static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr,
 329                                  unsigned size)
 330 {
 331     return fw_cfg_read(opaque);
 332 }
 333
 334 static void fw_cfg_comb_write(void *opaque, hwaddr addr,
 335                               uint64_t value, unsigned size)
 336 {
 337     switch (size) {
 338     case 1:
 339         fw_cfg_write(opaque, (uint8_t)value);
 340         break;
 341     case 2:
 342         fw_cfg_select(opaque, (uint16_t)value);
 343         break;
 344     }
 345 }
 346
 347 static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
 348                                   unsigned size, bool is_write)
 349 {
 350     return (size == 1) || (is_write && size == 2);
 351 }
 352
 353 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
 354     .write = fw_cfg_ctl_mem_write,
 355     .endianness = DEVICE_BIG_ENDIAN,
 356     .valid.accepts = fw_cfg_ctl_mem_valid,
 357 };
 358
 359 static const MemoryRegionOps fw_cfg_data_mem_ops = {
 360     .read = fw_cfg_data_mem_read,
 361     .write = fw_cfg_data_mem_write,
 362     .endianness = DEVICE_BIG_ENDIAN,
 363     .valid = {
 364         .min_access_size = 1,
 365         .max_access_size = 1,
 366         .accepts = fw_cfg_data_mem_valid,
 367     },
 368 };
 369
 370 static const MemoryRegionOps fw_cfg_comb_mem_ops = {
 371     .read = fw_cfg_comb_read,
 372     .write = fw_cfg_comb_write,
 373     .endianness = DEVICE_LITTLE_ENDIAN,
 374     .valid.accepts = fw_cfg_comb_valid,
 375 };
 376
 377 static void fw_cfg_reset(DeviceState *d)
 378 {
 379     FWCfgState *s = FW_CFG(d);
 380
 381     fw_cfg_select(s, 0);
 382 }
 383
 384 /* Save restore 32 bit int as uint16_t
 385    This is a Big hack, but it is how the old state did it.
 386    Or we broke compatibility in the state, or we can't use struct tm
 387  */
 388
 389 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 390 {
 391     uint32_t *v = pv;
 392     *v = qemu_get_be16(f);
 393     return 0;
 394 }
 395
 396 static void put_unused(QEMUFile *f, void *pv, size_t size)
 397 {
 398     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 399     fprintf(stderr, "This functions shouldn't be called.\n");
 400 }
 401
 402 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 403     .name = "int32_as_uint16",
 404     .get  = get_uint32_as_uint16,
 405     .put  = put_unused,
 406 };
 407
 408 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 409     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 410
 411
 412 static bool is_version_1(void *opaque, int version_id)
 413 {
 414     return version_id == 1;
 415 }
 416
 417 static const VMStateDescription vmstate_fw_cfg = {
 418     .name = "fw_cfg",
 419     .version_id = 2,
 420     .minimum_version_id = 1,
 421     .fields = (VMStateField[]) {
 422         VMSTATE_UINT16(cur_entry, FWCfgState),
 423         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 424         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 425         VMSTATE_END_OF_LIST()
 426     }
 427 };
 428
 429 static void fw_cfg_add_bytes_read_callback(FWCfgState *s, uint16_t key,
 430                                            FWCfgReadCallback callback,
 431                                            void *callback_opaque,
 432                                            void *data, size_t len)
 433 {
 434     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 435
 436     key &= FW_CFG_ENTRY_MASK;
 437
 438     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 439
 440     s->entries[arch][key].data = data;
 441     s->entries[arch][key].len = (uint32_t)len;
 442     s->entries[arch][key].read_callback = callback;
 443     s->entries[arch][key].callback_opaque = callback_opaque;
 444 }
 445
 446 static void *fw_cfg_modify_bytes_read(FWCfgState *s, uint16_t key,
 447                                               void *data, size_t len)
 448 {
 449     void *ptr;
 450     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 451
 452     key &= FW_CFG_ENTRY_MASK;
 453
 454     assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);
 455
 456     /* return the old data to the function caller, avoid memory leak */
 457     ptr = s->entries[arch][key].data;
 458     s->entries[arch][key].data = data;
 459     s->entries[arch][key].len = len;
 460     s->entries[arch][key].callback_opaque = NULL;
 461     s->entries[arch][key].callback = NULL;
 462
 463     return ptr;
 464 }
 465
 466 void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len)
 467 {
 468     fw_cfg_add_bytes_read_callback(s, key, NULL, NULL, data, len);
 469 }
 470
 471 void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
 472 {
 473     size_t sz = strlen(value) + 1;
 474
 475     fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
 476 }
 477
 478 void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 479 {
 480     uint16_t *copy;
 481
 482     copy = g_malloc(sizeof(value));
 483     *copy = cpu_to_le16(value);
 484     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 485 }
 486
 487 void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 488 {
 489     uint32_t *copy;
 490
 491     copy = g_malloc(sizeof(value));
 492     *copy = cpu_to_le32(value);
 493     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 494 }
 495
 496 void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 497 {
 498     uint64_t *copy;
 499
 500     copy = g_malloc(sizeof(value));
 501     *copy = cpu_to_le64(value);
 502     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 503 }
 504
 505 void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
 506                          void *callback_opaque, void *data, size_t len)
 507 {
 508     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 509
 510     assert(key & FW_CFG_WRITE_CHANNEL);
 511
 512     key &= FW_CFG_ENTRY_MASK;
 513
 514     assert(key < FW_CFG_MAX_ENTRY && len <= UINT32_MAX);
 515
 516     s->entries[arch][key].data = data;
 517     s->entries[arch][key].len = (uint32_t)len;
 518     s->entries[arch][key].callback_opaque = callback_opaque;
 519     s->entries[arch][key].callback = callback;
 520 }
 521
 522 void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
 523                               FWCfgReadCallback callback, void *callback_opaque,
 524                               void *data, size_t len)
 525 {
 526     int i, index;
 527     size_t dsize;
 528
 529     if (!s->files) {
 530         dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 531         s->files = g_malloc0(dsize);
 532         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
 533     }
 534
 535     index = be32_to_cpu(s->files->count);
 536     assert(index < FW_CFG_FILE_SLOTS);
 537
 538     fw_cfg_add_bytes_read_callback(s, FW_CFG_FILE_FIRST + index,
 539                                    callback, callback_opaque, data, len);
 540
 541     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 542             filename);
 543     for (i = 0; i < index; i++) {
 544         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 545             trace_fw_cfg_add_file_dupe(s, s->files->f[index].name);
 546             return;
 547         }
 548     }
 549
 550     s->files->f[index].size   = cpu_to_be32(len);
 551     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 552     trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
 553
 554     s->files->count = cpu_to_be32(index+1);
 555 }
 556
 557 void fw_cfg_add_file(FWCfgState *s,  const char *filename,
 558                      void *data, size_t len)
 559 {
 560     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 561 }
 562
 563 void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
 564                         void *data, size_t len)
 565 {
 566     int i, index;
 567     void *ptr = NULL;
 568
 569     assert(s->files);
 570
 571     index = be32_to_cpu(s->files->count);
 572     assert(index < FW_CFG_FILE_SLOTS);
 573
 574     for (i = 0; i < index; i++) {
 575         if (strcmp(filename, s->files->f[i].name) == 0) {
 576             ptr = fw_cfg_modify_bytes_read(s, FW_CFG_FILE_FIRST + i,
 577                                            data, len);
 578             s->files->f[i].size   = cpu_to_be32(len);
 579             return ptr;
 580         }
 581     }
 582     /* add new one */
 583     fw_cfg_add_file_callback(s, filename, NULL, NULL, data, len);
 584     return NULL;
 585 }
 586
 587 static void fw_cfg_machine_reset(void *opaque)
 588 {
 589     void *ptr;
 590     size_t len;
 591     FWCfgState *s = opaque;
 592     char *bootindex = get_boot_devices_list(&len, false);
 593
 594     ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
 595     g_free(ptr);
 596 }
 597
 598 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 599 {
 600     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 601     qemu_register_reset(fw_cfg_machine_reset, s);
 602 }
 603
 604
 605
 606 static void fw_cfg_init1(DeviceState *dev)
 607 {
 608     FWCfgState *s = FW_CFG(dev);
 609
 610     assert(!object_resolve_path(FW_CFG_PATH, NULL));
 611
 612     object_property_add_child(qdev_get_machine(), FW_CFG_NAME, OBJECT(s), NULL);
 613
 614     qdev_init_nofail(dev);
 615
 616     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
 617     fw_cfg_add_i32(s, FW_CFG_ID, 1);
 618     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 619     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 620     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 621     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 622     fw_cfg_bootsplash(s);
 623     fw_cfg_reboot(s);
 624
 625     s->machine_ready.notify = fw_cfg_machine_ready;
 626     qemu_add_machine_init_done_notifier(&s->machine_ready);
 627 }
 628
 629 FWCfgState *fw_cfg_init_io(uint32_t iobase)
 630 {
 631     DeviceState *dev;
 632
 633     dev = qdev_create(NULL, TYPE_FW_CFG_IO);
 634     qdev_prop_set_uint32(dev, "iobase", iobase);
 635     fw_cfg_init1(dev);
 636
 637     return FW_CFG(dev);
 638 }
 639
 640 FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, hwaddr data_addr,
 641                                  uint32_t data_width)
 642 {
 643     DeviceState *dev;
 644     SysBusDevice *sbd;
 645
 646     dev = qdev_create(NULL, TYPE_FW_CFG_MEM);
 647     qdev_prop_set_uint32(dev, "data_width", data_width);
 648
 649     fw_cfg_init1(dev);
 650
 651     sbd = SYS_BUS_DEVICE(dev);
 652     sysbus_mmio_map(sbd, 0, ctl_addr);
 653     sysbus_mmio_map(sbd, 1, data_addr);
 654
 655     return FW_CFG(dev);
 656 }
 657
 658 FWCfgState *fw_cfg_init_mem(hwaddr ctl_addr, hwaddr data_addr)
 659 {
 660     return fw_cfg_init_mem_wide(ctl_addr, data_addr,
 661                                 fw_cfg_data_mem_ops.valid.max_access_size);
 662 }
 663
 664
 665 FWCfgState *fw_cfg_find(void)
 666 {
 667     return FW_CFG(object_resolve_path(FW_CFG_PATH, NULL));
 668 }
 669
 670 static void fw_cfg_class_init(ObjectClass *klass, void *data)
 671 {
 672     DeviceClass *dc = DEVICE_CLASS(klass);
 673
 674     dc->reset = fw_cfg_reset;
 675     dc->vmsd = &vmstate_fw_cfg;
 676 }
 677
 678 static const TypeInfo fw_cfg_info = {
 679     .name          = TYPE_FW_CFG,
 680     .parent        = TYPE_SYS_BUS_DEVICE,
 681     .instance_size = sizeof(FWCfgState),
 682     .class_init    = fw_cfg_class_init,
 683 };
 684
 685
 686 static Property fw_cfg_io_properties[] = {
 687     DEFINE_PROP_UINT32("iobase", FWCfgIoState, iobase, -1),
 688     DEFINE_PROP_END_OF_LIST(),
 689 };
 690
 691 static void fw_cfg_io_realize(DeviceState *dev, Error **errp)
 692 {
 693     FWCfgIoState *s = FW_CFG_IO(dev);
 694     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 695
 696     memory_region_init_io(&s->comb_iomem, OBJECT(s), &fw_cfg_comb_mem_ops,
 697                           FW_CFG(s), "fwcfg", FW_CFG_SIZE);
 698     sysbus_add_io(sbd, s->iobase, &s->comb_iomem);
 699 }
 700
 701 static void fw_cfg_io_class_init(ObjectClass *klass, void *data)
 702 {
 703     DeviceClass *dc = DEVICE_CLASS(klass);
 704
 705     dc->realize = fw_cfg_io_realize;
 706     dc->props = fw_cfg_io_properties;
 707 }
 708
 709 static const TypeInfo fw_cfg_io_info = {
 710     .name          = TYPE_FW_CFG_IO,
 711     .parent        = TYPE_FW_CFG,
 712     .instance_size = sizeof(FWCfgIoState),
 713     .class_init    = fw_cfg_io_class_init,
 714 };
 715
 716
 717 static Property fw_cfg_mem_properties[] = {
 718     DEFINE_PROP_UINT32("data_width", FWCfgMemState, data_width, -1),
 719     DEFINE_PROP_END_OF_LIST(),
 720 };
 721
 722 static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
 723 {
 724     FWCfgMemState *s = FW_CFG_MEM(dev);
 725     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 726     const MemoryRegionOps *data_ops = &fw_cfg_data_mem_ops;
 727
 728     memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops,
 729                           FW_CFG(s), "fwcfg.ctl", FW_CFG_SIZE);
 730     sysbus_init_mmio(sbd, &s->ctl_iomem);
 731
 732     if (s->data_width > data_ops->valid.max_access_size) {
 733         /* memberwise copy because the "old_mmio" member is const */
 734         s->wide_data_ops.read       = data_ops->read;
 735         s->wide_data_ops.write      = data_ops->write;
 736         s->wide_data_ops.endianness = data_ops->endianness;
 737         s->wide_data_ops.valid      = data_ops->valid;
 738         s->wide_data_ops.impl       = data_ops->impl;
 739
 740         s->wide_data_ops.valid.max_access_size = s->data_width;
 741         s->wide_data_ops.impl.max_access_size  = s->data_width;
 742         data_ops = &s->wide_data_ops;
 743     }
 744     memory_region_init_io(&s->data_iomem, OBJECT(s), data_ops, FW_CFG(s),
 745                           "fwcfg.data", data_ops->valid.max_access_size);
 746     sysbus_init_mmio(sbd, &s->data_iomem);
 747 }
 748
 749 static void fw_cfg_mem_class_init(ObjectClass *klass, void *data)
 750 {
 751     DeviceClass *dc = DEVICE_CLASS(klass);
 752
 753     dc->realize = fw_cfg_mem_realize;
 754     dc->props = fw_cfg_mem_properties;
 755 }
 756
 757 static const TypeInfo fw_cfg_mem_info = {
 758     .name          = TYPE_FW_CFG_MEM,
 759     .parent        = TYPE_FW_CFG,
 760     .instance_size = sizeof(FWCfgMemState),
 761     .class_init    = fw_cfg_mem_class_init,
 762 };
 763
 764
 765 static void fw_cfg_register_types(void)
 766 {
 767     type_register_static(&fw_cfg_info);
 768     type_register_static(&fw_cfg_io_info);
 769     type_register_static(&fw_cfg_mem_info);
 770 }
 771
 772 type_init(fw_cfg_register_types)