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 FILE *probe_splashfile(char *filename, int *file_sizep, int *file_typep)
  64 {
  65     FILE *fp = NULL;
  66     int fop_ret;
  67     int file_size;
  68     int file_type = -1;
  69     unsigned char buf[2] = {0, 0};
  70     unsigned int filehead_value = 0;
  71     int bmp_bpp;
  72
  73     fp = fopen(filename, "rb");
  74     if (fp == NULL) {
  75         error_report("failed to open file '%s'.", filename);
  76         return fp;
  77     }
  78     /* check file size */
  79     fseek(fp, 0L, SEEK_END);
  80     file_size = ftell(fp);
  81     if (file_size < 2) {
  82         error_report("file size is less than 2 bytes '%s'.", filename);
  83         fclose(fp);
  84         fp = NULL;
  85         return fp;
  86     }
  87     /* check magic ID */
  88     fseek(fp, 0L, SEEK_SET);
  89     fop_ret = fread(buf, 1, 2, fp);
  90     filehead_value = (buf[0] + (buf[1] << 8)) & 0xffff;
  91     if (filehead_value == 0xd8ff) {
  92         file_type = JPG_FILE;
  93     } else {
  94         if (filehead_value == 0x4d42) {
  95             file_type = BMP_FILE;
  96         }
  97     }
  98     if (file_type < 0) {
  99         error_report("'%s' not jpg/bmp file,head:0x%x.",
 100                          filename, filehead_value);
 101         fclose(fp);
 102         fp = NULL;
 103         return fp;
 104     }
 105     /* check BMP bpp */
 106     if (file_type == BMP_FILE) {
 107         fseek(fp, 28, SEEK_SET);
 108         fop_ret = fread(buf, 1, 2, fp);
 109         bmp_bpp = (buf[0] + (buf[1] << 8)) & 0xffff;
 110         if (bmp_bpp != 24) {
 111             error_report("only 24bpp bmp file is supported.");
 112             fclose(fp);
 113             fp = NULL;
 114             return fp;
 115         }
 116     }
 117     /* return values */
 118     *file_sizep = file_size;
 119     *file_typep = file_type;
 120     return fp;
 121 }
 122
 123 static void fw_cfg_bootsplash(FWCfgState *s)
 124 {
 125     int boot_splash_time = -1;
 126     const char *boot_splash_filename = NULL;
 127     char *p;
 128     char *filename;
 129     FILE *fp;
 130     int fop_ret;
 131     int file_size;
 132     int file_type = -1;
 133     const char *temp;
 134
 135     /* get user configuration */
 136     QemuOptsList *plist = qemu_find_opts("boot-opts");
 137     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 138     if (opts != NULL) {
 139         temp = qemu_opt_get(opts, "splash");
 140         if (temp != NULL) {
 141             boot_splash_filename = temp;
 142         }
 143         temp = qemu_opt_get(opts, "splash-time");
 144         if (temp != NULL) {
 145             p = (char *)temp;
 146             boot_splash_time = strtol(p, (char **)&p, 10);
 147         }
 148     }
 149
 150     /* insert splash time if user configurated */
 151     if (boot_splash_time >= 0) {
 152         /* validate the input */
 153         if (boot_splash_time > 0xffff) {
 154             error_report("splash time is big than 65535, force it to 65535.");
 155             boot_splash_time = 0xffff;
 156         }
 157         /* use little endian format */
 158         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 159         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 160         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 161     }
 162
 163     /* insert splash file if user configurated */
 164     if (boot_splash_filename != NULL) {
 165         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 166         if (filename == NULL) {
 167             error_report("failed to find file '%s'.", boot_splash_filename);
 168             return;
 169         }
 170         /* probing the file */
 171         fp = probe_splashfile(filename, &file_size, &file_type);
 172         if (fp == NULL) {
 173             qemu_free(filename);
 174             return;
 175         }
 176         /* loading file data */
 177         if (boot_splash_filedata != NULL) {
 178             qemu_free(boot_splash_filedata);
 179         }
 180         boot_splash_filedata = qemu_malloc(file_size);
 181         boot_splash_filedata_size = file_size;
 182         fseek(fp, 0L, SEEK_SET);
 183         fop_ret = fread(boot_splash_filedata, 1, file_size, fp);
 184         fclose(fp);
 185         /* insert data */
 186         if (file_type == JPG_FILE) {
 187             fw_cfg_add_file(s, "bootsplash.jpg",
 188                     boot_splash_filedata, boot_splash_filedata_size);
 189         } else {
 190             fw_cfg_add_file(s, "bootsplash.bmp",
 191                     boot_splash_filedata, boot_splash_filedata_size);
 192         }
 193         qemu_free(filename);
 194     }
 195 }
 196
 197 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 198 {
 199     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 200     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 201
 202     FW_CFG_DPRINTF("write %d\n", value);
 203
 204     if (s->cur_entry & FW_CFG_WRITE_CHANNEL && s->cur_offset < e->len) {
 205         e->data[s->cur_offset++] = value;
 206         if (s->cur_offset == e->len) {
 207             e->callback(e->callback_opaque, e->data);
 208             s->cur_offset = 0;
 209         }
 210     }
 211 }
 212
 213 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 214 {
 215     int ret;
 216
 217     s->cur_offset = 0;
 218     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 219         s->cur_entry = FW_CFG_INVALID;
 220         ret = 0;
 221     } else {
 222         s->cur_entry = key;
 223         ret = 1;
 224     }
 225
 226     FW_CFG_DPRINTF("select key %d (%sfound)\n", key, ret ? "" : "not ");
 227
 228     return ret;
 229 }
 230
 231 static uint8_t fw_cfg_read(FWCfgState *s)
 232 {
 233     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 234     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 235     uint8_t ret;
 236
 237     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 238         ret = 0;
 239     else
 240         ret = e->data[s->cur_offset++];
 241
 242     FW_CFG_DPRINTF("read %d\n", ret);
 243
 244     return ret;
 245 }
 246
 247 static uint32_t fw_cfg_io_readb(void *opaque, uint32_t addr)
 248 {
 249     return fw_cfg_read(opaque);
 250 }
 251
 252 static void fw_cfg_io_writeb(void *opaque, uint32_t addr, uint32_t value)
 253 {
 254     fw_cfg_write(opaque, (uint8_t)value);
 255 }
 256
 257 static void fw_cfg_io_writew(void *opaque, uint32_t addr, uint32_t value)
 258 {
 259     fw_cfg_select(opaque, (uint16_t)value);
 260 }
 261
 262 static uint32_t fw_cfg_mem_readb(void *opaque, target_phys_addr_t addr)
 263 {
 264     return fw_cfg_read(opaque);
 265 }
 266
 267 static void fw_cfg_mem_writeb(void *opaque, target_phys_addr_t addr,
 268                               uint32_t value)
 269 {
 270     fw_cfg_write(opaque, (uint8_t)value);
 271 }
 272
 273 static void fw_cfg_mem_writew(void *opaque, target_phys_addr_t addr,
 274                               uint32_t value)
 275 {
 276     fw_cfg_select(opaque, (uint16_t)value);
 277 }
 278
 279 static CPUReadMemoryFunc * const fw_cfg_ctl_mem_read[3] = {
 280     NULL,
 281     NULL,
 282     NULL,
 283 };
 284
 285 static CPUWriteMemoryFunc * const fw_cfg_ctl_mem_write[3] = {
 286     NULL,
 287     fw_cfg_mem_writew,
 288     NULL,
 289 };
 290
 291 static CPUReadMemoryFunc * const fw_cfg_data_mem_read[3] = {
 292     fw_cfg_mem_readb,
 293     NULL,
 294     NULL,
 295 };
 296
 297 static CPUWriteMemoryFunc * const fw_cfg_data_mem_write[3] = {
 298     fw_cfg_mem_writeb,
 299     NULL,
 300     NULL,
 301 };
 302
 303 static void fw_cfg_reset(DeviceState *d)
 304 {
 305     FWCfgState *s = DO_UPCAST(FWCfgState, busdev.qdev, d);
 306
 307     fw_cfg_select(s, 0);
 308 }
 309
 310 /* Save restore 32 bit int as uint16_t
 311    This is a Big hack, but it is how the old state did it.
 312    Or we broke compatibility in the state, or we can't use struct tm
 313  */
 314
 315 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 316 {
 317     uint32_t *v = pv;
 318     *v = qemu_get_be16(f);
 319     return 0;
 320 }
 321
 322 static void put_unused(QEMUFile *f, void *pv, size_t size)
 323 {
 324     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 325     fprintf(stderr, "This functions shouldn't be called.\n");
 326 }
 327
 328 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 329     .name = "int32_as_uint16",
 330     .get  = get_uint32_as_uint16,
 331     .put  = put_unused,
 332 };
 333
 334 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 335     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 336
 337
 338 static bool is_version_1(void *opaque, int version_id)
 339 {
 340     return version_id == 1;
 341 }
 342
 343 static const VMStateDescription vmstate_fw_cfg = {
 344     .name = "fw_cfg",
 345     .version_id = 2,
 346     .minimum_version_id = 1,
 347     .minimum_version_id_old = 1,
 348     .fields      = (VMStateField []) {
 349         VMSTATE_UINT16(cur_entry, FWCfgState),
 350         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 351         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 352         VMSTATE_END_OF_LIST()
 353     }
 354 };
 355
 356 int fw_cfg_add_bytes(FWCfgState *s, uint16_t key, uint8_t *data, uint32_t len)
 357 {
 358     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 359
 360     key &= FW_CFG_ENTRY_MASK;
 361
 362     if (key >= FW_CFG_MAX_ENTRY)
 363         return 0;
 364
 365     s->entries[arch][key].data = data;
 366     s->entries[arch][key].len = len;
 367
 368     return 1;
 369 }
 370
 371 int fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 372 {
 373     uint16_t *copy;
 374
 375     copy = qemu_malloc(sizeof(value));
 376     *copy = cpu_to_le16(value);
 377     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 378 }
 379
 380 int fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 381 {
 382     uint32_t *copy;
 383
 384     copy = qemu_malloc(sizeof(value));
 385     *copy = cpu_to_le32(value);
 386     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 387 }
 388
 389 int fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 390 {
 391     uint64_t *copy;
 392
 393     copy = qemu_malloc(sizeof(value));
 394     *copy = cpu_to_le64(value);
 395     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 396 }
 397
 398 int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
 399                         void *callback_opaque, uint8_t *data, size_t len)
 400 {
 401     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 402
 403     if (!(key & FW_CFG_WRITE_CHANNEL))
 404         return 0;
 405
 406     key &= FW_CFG_ENTRY_MASK;
 407
 408     if (key >= FW_CFG_MAX_ENTRY || len > 65535)
 409         return 0;
 410
 411     s->entries[arch][key].data = data;
 412     s->entries[arch][key].len = len;
 413     s->entries[arch][key].callback_opaque = callback_opaque;
 414     s->entries[arch][key].callback = callback;
 415
 416     return 1;
 417 }
 418
 419 int fw_cfg_add_file(FWCfgState *s,  const char *filename, uint8_t *data,
 420                     uint32_t len)
 421 {
 422     int i, index;
 423
 424     if (!s->files) {
 425         int dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 426         s->files = qemu_mallocz(dsize);
 427         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, (uint8_t*)s->files, dsize);
 428     }
 429
 430     index = be32_to_cpu(s->files->count);
 431     if (index == FW_CFG_FILE_SLOTS) {
 432         fprintf(stderr, "fw_cfg: out of file slots\n");
 433         return 0;
 434     }
 435
 436     fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);
 437
 438     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 439             filename);
 440     for (i = 0; i < index; i++) {
 441         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 442             FW_CFG_DPRINTF("%s: skip duplicate: %s\n", __FUNCTION__,
 443                            s->files->f[index].name);
 444             return 1;
 445         }
 446     }
 447
 448     s->files->f[index].size   = cpu_to_be32(len);
 449     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 450     FW_CFG_DPRINTF("%s: #%d: %s (%d bytes)\n", __FUNCTION__,
 451                    index, s->files->f[index].name, len);
 452
 453     s->files->count = cpu_to_be32(index+1);
 454     return 1;
 455 }
 456
 457 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 458 {
 459     uint32_t len;
 460     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 461     char *bootindex = get_boot_devices_list(&len);
 462
 463     fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
 464 }
 465
 466 FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
 467                         target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
 468 {
 469     DeviceState *dev;
 470     SysBusDevice *d;
 471     FWCfgState *s;
 472
 473     dev = qdev_create(NULL, "fw_cfg");
 474     qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
 475     qdev_prop_set_uint32(dev, "data_iobase", data_port);
 476     qdev_init_nofail(dev);
 477     d = sysbus_from_qdev(dev);
 478
 479     s = DO_UPCAST(FWCfgState, busdev.qdev, dev);
 480
 481     if (ctl_addr) {
 482         sysbus_mmio_map(d, 0, ctl_addr);
 483     }
 484     if (data_addr) {
 485         sysbus_mmio_map(d, 1, data_addr);
 486     }
 487     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (uint8_t *)"QEMU", 4);
 488     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 489     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 490     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 491     fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
 492     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 493     fw_cfg_bootsplash(s);
 494
 495     s->machine_ready.notify = fw_cfg_machine_ready;
 496     qemu_add_machine_init_done_notifier(&s->machine_ready);
 497
 498     return s;
 499 }
 500
 501 static int fw_cfg_init1(SysBusDevice *dev)
 502 {
 503     FWCfgState *s = FROM_SYSBUS(FWCfgState, dev);
 504     int io_ctl_memory, io_data_memory;
 505
 506     io_ctl_memory = cpu_register_io_memory(fw_cfg_ctl_mem_read,
 507                                            fw_cfg_ctl_mem_write, s,
 508                                            DEVICE_NATIVE_ENDIAN);
 509     sysbus_init_mmio(dev, FW_CFG_SIZE, io_ctl_memory);
 510
 511     io_data_memory = cpu_register_io_memory(fw_cfg_data_mem_read,
 512                                             fw_cfg_data_mem_write, s,
 513                                             DEVICE_NATIVE_ENDIAN);
 514     sysbus_init_mmio(dev, FW_CFG_SIZE, io_data_memory);
 515
 516     if (s->ctl_iobase) {
 517         register_ioport_write(s->ctl_iobase, 2, 2, fw_cfg_io_writew, s);
 518     }
 519     if (s->data_iobase) {
 520         register_ioport_read(s->data_iobase, 1, 1, fw_cfg_io_readb, s);
 521         register_ioport_write(s->data_iobase, 1, 1, fw_cfg_io_writeb, s);
 522     }
 523     return 0;
 524 }
 525
 526 static SysBusDeviceInfo fw_cfg_info = {
 527     .init = fw_cfg_init1,
 528     .qdev.name = "fw_cfg",
 529     .qdev.size = sizeof(FWCfgState),
 530     .qdev.vmsd = &vmstate_fw_cfg,
 531     .qdev.reset = fw_cfg_reset,
 532     .qdev.no_user = 1,
 533     .qdev.props = (Property[]) {
 534         DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1),
 535         DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1),
 536         DEFINE_PROP_END_OF_LIST(),
 537     },
 538 };
 539
 540 static void fw_cfg_register_devices(void)
 541 {
 542     sysbus_register_withprop(&fw_cfg_info);
 543 }
 544
 545 device_init(fw_cfg_register_devices)