hw/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.h"
  25 #include "sysemu.h"
  26 #include "isa.h"
  27 #include "fw_cfg.h"
  28 #include "sysbus.h"
  29 #include "qemu-error.h"
  30
  31 /* debug firmware config */
  32 //#define DEBUG_FW_CFG
  33
  34 #ifdef DEBUG_FW_CFG
  35 #define FW_CFG_DPRINTF(fmt, ...)                        \
  36     do { printf("FW_CFG: " fmt , ## __VA_ARGS__); } while (0)
  37 #else
  38 #define FW_CFG_DPRINTF(fmt, ...)
  39 #endif
  40
  41 #define FW_CFG_SIZE 2
  42
  43 typedef struct FWCfgEntry {
  44     uint32_t len;
  45     uint8_t *data;
  46     void *callback_opaque;
  47     FWCfgCallback callback;
  48 } FWCfgEntry;
  49
  50 struct FWCfgState {
  51     SysBusDevice busdev;
  52     uint32_t ctl_iobase, data_iobase;
  53     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
  54     FWCfgFiles *files;
  55     uint16_t cur_entry;
  56     uint32_t cur_offset;
  57     Notifier machine_ready;
  58 };
  59
  60 #define JPG_FILE 0
  61 #define BMP_FILE 1
  62
  63 static char *read_splashfile(char *filename, int *file_sizep, int *file_typep)
  64 {
  65     GError *err = NULL;
  66     gboolean res;
  67     gchar *content;
  68     int file_type = -1;
  69     unsigned int filehead = 0;
  70     int bmp_bpp;
  71
  72     res = g_file_get_contents(filename, &content, (gsize *)file_sizep, &err);
  73     if (res == FALSE) {
  74         error_report("failed to read splash file '%s'", filename);
  75         g_error_free(err);
  76         return NULL;
  77     }
  78
  79     /* check file size */
  80     if (*file_sizep < 30) {
  81         goto error;
  82     }
  83
  84     /* check magic ID */
  85     filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
  86     if (filehead == 0xd8ff) {
  87         file_type = JPG_FILE;
  88     } else if (filehead == 0x4d42) {
  89         file_type = BMP_FILE;
  90     } else {
  91         goto error;
  92     }
  93
  94     /* check BMP bpp */
  95     if (file_type == BMP_FILE) {
  96         bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
  97         if (bmp_bpp != 24) {
  98             goto error;
  99         }
 100     }
 101
 102     /* return values */
 103     *file_typep = file_type;
 104
 105     return content;
 106
 107 error:
 108     error_report("splash file '%s' format not recognized; must be JPEG "
 109                  "or 24 bit BMP", filename);
 110     g_free(content);
 111     return NULL;
 112 }
 113
 114 static void fw_cfg_bootsplash(FWCfgState *s)
 115 {
 116     int boot_splash_time = -1;
 117     const char *boot_splash_filename = NULL;
 118     char *p;
 119     char *filename, *file_data;
 120     int file_size;
 121     int file_type = -1;
 122     const char *temp;
 123
 124     /* get user configuration */
 125     QemuOptsList *plist = qemu_find_opts("boot-opts");
 126     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 127     if (opts != NULL) {
 128         temp = qemu_opt_get(opts, "splash");
 129         if (temp != NULL) {
 130             boot_splash_filename = temp;
 131         }
 132         temp = qemu_opt_get(opts, "splash-time");
 133         if (temp != NULL) {
 134             p = (char *)temp;
 135             boot_splash_time = strtol(p, (char **)&p, 10);
 136         }
 137     }
 138
 139     /* insert splash time if user configurated */
 140     if (boot_splash_time >= 0) {
 141         /* validate the input */
 142         if (boot_splash_time > 0xffff) {
 143             error_report("splash time is big than 65535, force it to 65535.");
 144             boot_splash_time = 0xffff;
 145         }
 146         /* use little endian format */
 147         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 148         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 149         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 150     }
 151
 152     /* insert splash file if user configurated */
 153     if (boot_splash_filename != NULL) {
 154         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 155         if (filename == NULL) {
 156             error_report("failed to find file '%s'.", boot_splash_filename);
 157             return;
 158         }
 159
 160         /* loading file data */
 161         file_data = read_splashfile(filename, &file_size, &file_type);
 162         if (file_data == NULL) {
 163             g_free(filename);
 164             return;
 165         }
 166         if (boot_splash_filedata != NULL) {
 167             g_free(boot_splash_filedata);
 168         }
 169         boot_splash_filedata = (uint8_t *)file_data;
 170         boot_splash_filedata_size = file_size;
 171
 172         /* insert data */
 173         if (file_type == JPG_FILE) {
 174             fw_cfg_add_file(s, "bootsplash.jpg",
 175                     boot_splash_filedata, boot_splash_filedata_size);
 176         } else {
 177             fw_cfg_add_file(s, "bootsplash.bmp",
 178                     boot_splash_filedata, boot_splash_filedata_size);
 179         }
 180         g_free(filename);
 181     }
 182 }
 183
 184 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 185 {
 186     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 187     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 188
 189     FW_CFG_DPRINTF("write %d\n", value);
 190
 191     if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
 192         s->cur_offset < e->len) {
 193         e->data[s->cur_offset++] = value;
 194         if (s->cur_offset == e->len) {
 195             e->callback(e->callback_opaque, e->data);
 196             s->cur_offset = 0;
 197         }
 198     }
 199 }
 200
 201 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 202 {
 203     int ret;
 204
 205     s->cur_offset = 0;
 206     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 207         s->cur_entry = FW_CFG_INVALID;
 208         ret = 0;
 209     } else {
 210         s->cur_entry = key;
 211         ret = 1;
 212     }
 213
 214     FW_CFG_DPRINTF("select key %d (%sfound)\n", key, ret ? "" : "not ");
 215
 216     return ret;
 217 }
 218
 219 static uint8_t fw_cfg_read(FWCfgState *s)
 220 {
 221     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 222     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 223     uint8_t ret;
 224
 225     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 226         ret = 0;
 227     else
 228         ret = e->data[s->cur_offset++];
 229
 230     FW_CFG_DPRINTF("read %d\n", ret);
 231
 232     return ret;
 233 }
 234
 235 static uint32_t fw_cfg_io_readb(void *opaque, uint32_t addr)
 236 {
 237     return fw_cfg_read(opaque);
 238 }
 239
 240 static void fw_cfg_io_writeb(void *opaque, uint32_t addr, uint32_t value)
 241 {
 242     fw_cfg_write(opaque, (uint8_t)value);
 243 }
 244
 245 static void fw_cfg_io_writew(void *opaque, uint32_t addr, uint32_t value)
 246 {
 247     fw_cfg_select(opaque, (uint16_t)value);
 248 }
 249
 250 static uint32_t fw_cfg_mem_readb(void *opaque, target_phys_addr_t addr)
 251 {
 252     return fw_cfg_read(opaque);
 253 }
 254
 255 static void fw_cfg_mem_writeb(void *opaque, target_phys_addr_t addr,
 256                               uint32_t value)
 257 {
 258     fw_cfg_write(opaque, (uint8_t)value);
 259 }
 260
 261 static void fw_cfg_mem_writew(void *opaque, target_phys_addr_t addr,
 262                               uint32_t value)
 263 {
 264     fw_cfg_select(opaque, (uint16_t)value);
 265 }
 266
 267 static CPUReadMemoryFunc * const fw_cfg_ctl_mem_read[3] = {
 268     NULL,
 269     NULL,
 270     NULL,
 271 };
 272
 273 static CPUWriteMemoryFunc * const fw_cfg_ctl_mem_write[3] = {
 274     NULL,
 275     fw_cfg_mem_writew,
 276     NULL,
 277 };
 278
 279 static CPUReadMemoryFunc * const fw_cfg_data_mem_read[3] = {
 280     fw_cfg_mem_readb,
 281     NULL,
 282     NULL,
 283 };
 284
 285 static CPUWriteMemoryFunc * const fw_cfg_data_mem_write[3] = {
 286     fw_cfg_mem_writeb,
 287     NULL,
 288     NULL,
 289 };
 290
 291 static void fw_cfg_reset(DeviceState *d)
 292 {
 293     FWCfgState *s = DO_UPCAST(FWCfgState, busdev.qdev, d);
 294
 295     fw_cfg_select(s, 0);
 296 }
 297
 298 /* Save restore 32 bit int as uint16_t
 299    This is a Big hack, but it is how the old state did it.
 300    Or we broke compatibility in the state, or we can't use struct tm
 301  */
 302
 303 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 304 {
 305     uint32_t *v = pv;
 306     *v = qemu_get_be16(f);
 307     return 0;
 308 }
 309
 310 static void put_unused(QEMUFile *f, void *pv, size_t size)
 311 {
 312     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 313     fprintf(stderr, "This functions shouldn't be called.\n");
 314 }
 315
 316 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 317     .name = "int32_as_uint16",
 318     .get  = get_uint32_as_uint16,
 319     .put  = put_unused,
 320 };
 321
 322 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 323     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 324
 325
 326 static bool is_version_1(void *opaque, int version_id)
 327 {
 328     return version_id == 1;
 329 }
 330
 331 static const VMStateDescription vmstate_fw_cfg = {
 332     .name = "fw_cfg",
 333     .version_id = 2,
 334     .minimum_version_id = 1,
 335     .minimum_version_id_old = 1,
 336     .fields      = (VMStateField []) {
 337         VMSTATE_UINT16(cur_entry, FWCfgState),
 338         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 339         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 340         VMSTATE_END_OF_LIST()
 341     }
 342 };
 343
 344 int fw_cfg_add_bytes(FWCfgState *s, uint16_t key, uint8_t *data, uint32_t len)
 345 {
 346     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 347
 348     key &= FW_CFG_ENTRY_MASK;
 349
 350     if (key >= FW_CFG_MAX_ENTRY)
 351         return 0;
 352
 353     s->entries[arch][key].data = data;
 354     s->entries[arch][key].len = len;
 355
 356     return 1;
 357 }
 358
 359 int fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 360 {
 361     uint16_t *copy;
 362
 363     copy = g_malloc(sizeof(value));
 364     *copy = cpu_to_le16(value);
 365     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 366 }
 367
 368 int fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 369 {
 370     uint32_t *copy;
 371
 372     copy = g_malloc(sizeof(value));
 373     *copy = cpu_to_le32(value);
 374     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 375 }
 376
 377 int fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 378 {
 379     uint64_t *copy;
 380
 381     copy = g_malloc(sizeof(value));
 382     *copy = cpu_to_le64(value);
 383     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 384 }
 385
 386 int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
 387                         void *callback_opaque, uint8_t *data, size_t len)
 388 {
 389     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 390
 391     if (!(key & FW_CFG_WRITE_CHANNEL))
 392         return 0;
 393
 394     key &= FW_CFG_ENTRY_MASK;
 395
 396     if (key >= FW_CFG_MAX_ENTRY || len > 65535)
 397         return 0;
 398
 399     s->entries[arch][key].data = data;
 400     s->entries[arch][key].len = len;
 401     s->entries[arch][key].callback_opaque = callback_opaque;
 402     s->entries[arch][key].callback = callback;
 403
 404     return 1;
 405 }
 406
 407 int fw_cfg_add_file(FWCfgState *s,  const char *filename, uint8_t *data,
 408                     uint32_t len)
 409 {
 410     int i, index;
 411
 412     if (!s->files) {
 413         int dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 414         s->files = g_malloc0(dsize);
 415         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, (uint8_t*)s->files, dsize);
 416     }
 417
 418     index = be32_to_cpu(s->files->count);
 419     if (index == FW_CFG_FILE_SLOTS) {
 420         fprintf(stderr, "fw_cfg: out of file slots\n");
 421         return 0;
 422     }
 423
 424     fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);
 425
 426     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 427             filename);
 428     for (i = 0; i < index; i++) {
 429         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 430             FW_CFG_DPRINTF("%s: skip duplicate: %s\n", __FUNCTION__,
 431                            s->files->f[index].name);
 432             return 1;
 433         }
 434     }
 435
 436     s->files->f[index].size   = cpu_to_be32(len);
 437     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 438     FW_CFG_DPRINTF("%s: #%d: %s (%d bytes)\n", __FUNCTION__,
 439                    index, s->files->f[index].name, len);
 440
 441     s->files->count = cpu_to_be32(index+1);
 442     return 1;
 443 }
 444
 445 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 446 {
 447     uint32_t len;
 448     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 449     char *bootindex = get_boot_devices_list(&len);
 450
 451     fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
 452 }
 453
 454 FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
 455                         target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
 456 {
 457     DeviceState *dev;
 458     SysBusDevice *d;
 459     FWCfgState *s;
 460
 461     dev = qdev_create(NULL, "fw_cfg");
 462     qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
 463     qdev_prop_set_uint32(dev, "data_iobase", data_port);
 464     qdev_init_nofail(dev);
 465     d = sysbus_from_qdev(dev);
 466
 467     s = DO_UPCAST(FWCfgState, busdev.qdev, dev);
 468
 469     if (ctl_addr) {
 470         sysbus_mmio_map(d, 0, ctl_addr);
 471     }
 472     if (data_addr) {
 473         sysbus_mmio_map(d, 1, data_addr);
 474     }
 475     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (uint8_t *)"QEMU", 4);
 476     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 477     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 478     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 479     fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
 480     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 481     fw_cfg_bootsplash(s);
 482
 483     s->machine_ready.notify = fw_cfg_machine_ready;
 484     qemu_add_machine_init_done_notifier(&s->machine_ready);
 485
 486     return s;
 487 }
 488
 489 static int fw_cfg_init1(SysBusDevice *dev)
 490 {
 491     FWCfgState *s = FROM_SYSBUS(FWCfgState, dev);
 492     int io_ctl_memory, io_data_memory;
 493
 494     io_ctl_memory = cpu_register_io_memory(fw_cfg_ctl_mem_read,
 495                                            fw_cfg_ctl_mem_write, s,
 496                                            DEVICE_NATIVE_ENDIAN);
 497     sysbus_init_mmio(dev, FW_CFG_SIZE, io_ctl_memory);
 498
 499     io_data_memory = cpu_register_io_memory(fw_cfg_data_mem_read,
 500                                             fw_cfg_data_mem_write, s,
 501                                             DEVICE_NATIVE_ENDIAN);
 502     sysbus_init_mmio(dev, FW_CFG_SIZE, io_data_memory);
 503
 504     if (s->ctl_iobase) {
 505         register_ioport_write(s->ctl_iobase, 2, 2, fw_cfg_io_writew, s);
 506     }
 507     if (s->data_iobase) {
 508         register_ioport_read(s->data_iobase, 1, 1, fw_cfg_io_readb, s);
 509         register_ioport_write(s->data_iobase, 1, 1, fw_cfg_io_writeb, s);
 510     }
 511     return 0;
 512 }
 513
 514 static SysBusDeviceInfo fw_cfg_info = {
 515     .init = fw_cfg_init1,
 516     .qdev.name = "fw_cfg",
 517     .qdev.size = sizeof(FWCfgState),
 518     .qdev.vmsd = &vmstate_fw_cfg,
 519     .qdev.reset = fw_cfg_reset,
 520     .qdev.no_user = 1,
 521     .qdev.props = (Property[]) {
 522         DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1),
 523         DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1),
 524         DEFINE_PROP_END_OF_LIST(),
 525     },
 526 };
 527
 528 static void fw_cfg_register_devices(void)
 529 {
 530     sysbus_register_withprop(&fw_cfg_info);
 531 }
 532
 533 device_init(fw_cfg_register_devices)