grub-core/kern/efi/efi.c

   1 /* efi.c - generic EFI support */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007,2008,2009,2010  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/misc.h>
  21 #include <grub/charset.h>
  22 #include <grub/efi/api.h>
  23 #include <grub/efi/efi.h>
  24 #include <grub/efi/console_control.h>
  25 #include <grub/efi/pe32.h>
  26 #include <grub/time.h>
  27 #include <grub/term.h>
  28 #include <grub/kernel.h>
  29 #include <grub/mm.h>
  30 #include <grub/loader.h>
  31
  32 /* The handle of GRUB itself. Filled in by the startup code.  */
  33 grub_efi_handle_t grub_efi_image_handle;
  34
  35 /* The pointer to a system table. Filled in by the startup code.  */
  36 grub_efi_system_table_t *grub_efi_system_table;
  37
  38 static grub_efi_guid_t console_control_guid = GRUB_EFI_CONSOLE_CONTROL_GUID;
  39 static grub_efi_guid_t loaded_image_guid = GRUB_EFI_LOADED_IMAGE_GUID;
  40 static grub_efi_guid_t device_path_guid = GRUB_EFI_DEVICE_PATH_GUID;
  41
  42 void *
  43 grub_efi_locate_protocol (grub_efi_guid_t *protocol, void *registration)
  44 {
  45   void *interface;
  46   grub_efi_status_t status;
  47
  48   status = efi_call_3 (grub_efi_system_table->boot_services->locate_protocol,
  49                        protocol, registration, &interface);
  50   if (status != GRUB_EFI_SUCCESS)
  51     return 0;
  52
  53   return interface;
  54 }
  55
  56 /* Return the array of handles which meet the requirement. If successful,
  57    the number of handles is stored in NUM_HANDLES. The array is allocated
  58    from the heap.  */
  59 grub_efi_handle_t *
  60 grub_efi_locate_handle (grub_efi_locate_search_type_t search_type,
  61                         grub_efi_guid_t *protocol,
  62                         void *search_key,
  63                         grub_efi_uintn_t *num_handles)
  64 {
  65   grub_efi_boot_services_t *b;
  66   grub_efi_status_t status;
  67   grub_efi_handle_t *buffer;
  68   grub_efi_uintn_t buffer_size = 8 * sizeof (grub_efi_handle_t);
  69
  70   buffer = grub_malloc (buffer_size);
  71   if (! buffer)
  72     return 0;
  73
  74   b = grub_efi_system_table->boot_services;
  75   status = efi_call_5 (b->locate_handle, search_type, protocol, search_key,
  76                              &buffer_size, buffer);
  77   if (status == GRUB_EFI_BUFFER_TOO_SMALL)
  78     {
  79       grub_free (buffer);
  80       buffer = grub_malloc (buffer_size);
  81       if (! buffer)
  82         return 0;
  83
  84       status = efi_call_5 (b->locate_handle, search_type, protocol, search_key,
  85                                  &buffer_size, buffer);
  86     }
  87
  88   if (status != GRUB_EFI_SUCCESS)
  89     {
  90       grub_free (buffer);
  91       return 0;
  92     }
  93
  94   *num_handles = buffer_size / sizeof (grub_efi_handle_t);
  95   return buffer;
  96 }
  97
  98 void *
  99 grub_efi_open_protocol (grub_efi_handle_t handle,
 100                         grub_efi_guid_t *protocol,
 101                         grub_efi_uint32_t attributes)
 102 {
 103   grub_efi_boot_services_t *b;
 104   grub_efi_status_t status;
 105   void *interface;
 106
 107   b = grub_efi_system_table->boot_services;
 108   status = efi_call_6 (b->open_protocol, handle,
 109                        protocol,
 110                        &interface,
 111                        grub_efi_image_handle,
 112                        0,
 113                        attributes);
 114   if (status != GRUB_EFI_SUCCESS)
 115     return 0;
 116
 117   return interface;
 118 }
 119
 120 int
 121 grub_efi_set_text_mode (int on)
 122 {
 123   grub_efi_console_control_protocol_t *c;
 124   grub_efi_screen_mode_t mode, new_mode;
 125
 126   c = grub_efi_locate_protocol (&console_control_guid, 0);
 127   if (! c)
 128     /* No console control protocol instance available, assume it is
 129        already in text mode. */
 130     return 1;
 131
 132   if (efi_call_4 (c->get_mode, c, &mode, 0, 0) != GRUB_EFI_SUCCESS)
 133     return 0;
 134
 135   new_mode = on ? GRUB_EFI_SCREEN_TEXT : GRUB_EFI_SCREEN_GRAPHICS;
 136   if (mode != new_mode)
 137     if (efi_call_2 (c->set_mode, c, new_mode) != GRUB_EFI_SUCCESS)
 138       return 0;
 139
 140   return 1;
 141 }
 142
 143 void
 144 grub_efi_stall (grub_efi_uintn_t microseconds)
 145 {
 146   efi_call_1 (grub_efi_system_table->boot_services->stall, microseconds);
 147 }
 148
 149 grub_efi_loaded_image_t *
 150 grub_efi_get_loaded_image (grub_efi_handle_t image_handle)
 151 {
 152   return grub_efi_open_protocol (image_handle,
 153                                  &loaded_image_guid,
 154                                  GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
 155 }
 156
 157 void
 158 grub_exit (void)
 159 {
 160   grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
 161   efi_call_4 (grub_efi_system_table->boot_services->exit,
 162               grub_efi_image_handle, GRUB_EFI_SUCCESS, 0, 0);
 163   for (;;) ;
 164 }
 165
 166 grub_err_t
 167 grub_efi_set_virtual_address_map (grub_efi_uintn_t memory_map_size,
 168                                   grub_efi_uintn_t descriptor_size,
 169                                   grub_efi_uint32_t descriptor_version,
 170                                   grub_efi_memory_descriptor_t *virtual_map)
 171 {
 172   grub_efi_runtime_services_t *r;
 173   grub_efi_status_t status;
 174
 175   r = grub_efi_system_table->runtime_services;
 176   status = efi_call_4 (r->set_virtual_address_map, memory_map_size,
 177                        descriptor_size, descriptor_version, virtual_map);
 178
 179   if (status == GRUB_EFI_SUCCESS)
 180     return GRUB_ERR_NONE;
 181
 182   return grub_error (GRUB_ERR_IO, "set_virtual_address_map failed");
 183 }
 184
 185 grub_err_t
 186 grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
 187                       void *data, grub_size_t datasize)
 188 {
 189   grub_efi_status_t status;
 190   grub_efi_runtime_services_t *r;
 191   grub_efi_char16_t *var16;
 192   grub_size_t len, len16;
 193
 194   len = grub_strlen (var);
 195   len16 = len * GRUB_MAX_UTF16_PER_UTF8;
 196   var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
 197   if (!var16)
 198     return grub_errno;
 199   len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
 200   var16[len16] = 0;
 201
 202   r = grub_efi_system_table->runtime_services;
 203
 204   status = efi_call_5 (r->set_variable, var16, guid,
 205                        (GRUB_EFI_VARIABLE_NON_VOLATILE
 206                         | GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS
 207                         | GRUB_EFI_VARIABLE_RUNTIME_ACCESS),
 208                        datasize, data);
 209   grub_free (var16);
 210   if (status == GRUB_EFI_SUCCESS)
 211     return GRUB_ERR_NONE;
 212
 213   return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
 214 }
 215
 216 void *
 217 grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
 218                        grub_size_t *datasize_out)
 219 {
 220   grub_efi_status_t status;
 221   grub_efi_uintn_t datasize = 0;
 222   grub_efi_runtime_services_t *r;
 223   grub_efi_char16_t *var16;
 224   void *data;
 225   grub_size_t len, len16;
 226
 227   *datasize_out = 0;
 228
 229   len = grub_strlen (var);
 230   len16 = len * GRUB_MAX_UTF16_PER_UTF8;
 231   var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
 232   if (!var16)
 233     return NULL;
 234   len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
 235   var16[len16] = 0;
 236
 237   r = grub_efi_system_table->runtime_services;
 238
 239   status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, NULL);
 240
 241   if (status != GRUB_EFI_BUFFER_TOO_SMALL || !datasize)
 242     {
 243       grub_free (var16);
 244       return NULL;
 245     }
 246
 247   data = grub_malloc (datasize);
 248   if (!data)
 249     {
 250       grub_free (var16);
 251       return NULL;
 252     }
 253
 254   status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, data);
 255   grub_free (var16);
 256
 257   if (status == GRUB_EFI_SUCCESS)
 258     {
 259       *datasize_out = datasize;
 260       return data;
 261     }
 262
 263   grub_free (data);
 264   return NULL;
 265 }
 266
 267 #pragma GCC diagnostic ignored "-Wcast-align"
 268
 269 /* Search the mods section from the PE32/PE32+ image. This code uses
 270    a PE32 header, but should work with PE32+ as well.  */
 271 grub_addr_t
 272 grub_efi_modules_addr (void)
 273 {
 274   grub_efi_loaded_image_t *image;
 275   struct grub_pe32_header *header;
 276   struct grub_pe32_coff_header *coff_header;
 277   struct grub_pe32_section_table *sections;
 278   struct grub_pe32_section_table *section;
 279   struct grub_module_info *info;
 280   grub_uint16_t i;
 281
 282   image = grub_efi_get_loaded_image (grub_efi_image_handle);
 283   if (! image)
 284     return 0;
 285
 286   header = image->image_base;
 287   coff_header = &(header->coff_header);
 288   sections
 289     = (struct grub_pe32_section_table *) ((char *) coff_header
 290                                           + sizeof (*coff_header)
 291                                           + coff_header->optional_header_size);
 292
 293   for (i = 0, section = sections;
 294        i < coff_header->num_sections;
 295        i++, section++)
 296     {
 297       if (grub_strcmp (section->name, "mods") == 0)
 298         break;
 299     }
 300
 301   if (i == coff_header->num_sections)
 302     return 0;
 303
 304   info = (struct grub_module_info *) ((char *) image->image_base
 305                                       + section->virtual_address);
 306   if (info->magic != GRUB_MODULE_MAGIC)
 307     return 0;
 308
 309   return (grub_addr_t) info;
 310 }
 311
 312 #pragma GCC diagnostic error "-Wcast-align"
 313
 314 char *
 315 grub_efi_get_filename (grub_efi_device_path_t *dp0)
 316 {
 317   char *name = 0, *p, *pi;
 318   grub_size_t filesize = 0;
 319   grub_efi_device_path_t *dp;
 320
 321   dp = dp0;
 322
 323   while (1)
 324     {
 325       grub_efi_uint8_t type = GRUB_EFI_DEVICE_PATH_TYPE (dp);
 326       grub_efi_uint8_t subtype = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp);
 327
 328       if (type == GRUB_EFI_END_DEVICE_PATH_TYPE)
 329         break;
 330       if (type == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE
 331                && subtype == GRUB_EFI_FILE_PATH_DEVICE_PATH_SUBTYPE)
 332         {
 333           grub_efi_uint16_t len;
 334           len = ((GRUB_EFI_DEVICE_PATH_LENGTH (dp) - 4)
 335                  / sizeof (grub_efi_char16_t));
 336           filesize += GRUB_MAX_UTF8_PER_UTF16 * len + 2;
 337         }
 338
 339       dp = GRUB_EFI_NEXT_DEVICE_PATH (dp);
 340     }
 341
 342   if (!filesize)
 343     return NULL;
 344
 345   dp = dp0;
 346
 347   p = name = grub_malloc (filesize);
 348   if (!name)
 349     return NULL;
 350
 351   while (1)
 352     {
 353       grub_efi_uint8_t type = GRUB_EFI_DEVICE_PATH_TYPE (dp);
 354       grub_efi_uint8_t subtype = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp);
 355
 356       if (type == GRUB_EFI_END_DEVICE_PATH_TYPE)
 357         break;
 358       else if (type == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE
 359                && subtype == GRUB_EFI_FILE_PATH_DEVICE_PATH_SUBTYPE)
 360         {
 361           grub_efi_file_path_device_path_t *fp;
 362           grub_efi_uint16_t len;
 363
 364           *p++ = '/';
 365
 366           len = ((GRUB_EFI_DEVICE_PATH_LENGTH (dp) - 4)
 367                  / sizeof (grub_efi_char16_t));
 368           fp = (grub_efi_file_path_device_path_t *) dp;
 369           /* According to EFI spec Path Name is NULL terminated */
 370           while (len > 0 && fp->path_name[len - 1] == 0)
 371             len--;
 372
 373           p = (char *) grub_utf16_to_utf8 ((unsigned char *) p, fp->path_name, len);
 374         }
 375
 376       dp = GRUB_EFI_NEXT_DEVICE_PATH (dp);
 377     }
 378
 379   *p = '\0';
 380
 381   for (pi = name, p = name; *pi;)
 382     {
 383       /* EFI breaks paths with backslashes.  */
 384       if (*pi == '\\' || *pi == '/')
 385         {
 386           *p++ = '/';
 387           while (*pi == '\\' || *pi == '/')
 388             pi++;
 389           continue;
 390         }
 391       *p++ = *pi++;
 392     }
 393   *p = '\0';
 394
 395   return name;
 396 }
 397
 398 grub_efi_device_path_t *
 399 grub_efi_get_device_path (grub_efi_handle_t handle)
 400 {
 401   return grub_efi_open_protocol (handle, &device_path_guid,
 402                                  GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
 403 }
 404
 405 /* Return the device path node right before the end node.  */
 406 grub_efi_device_path_t *
 407 grub_efi_find_last_device_path (const grub_efi_device_path_t *dp)
 408 {
 409   grub_efi_device_path_t *next, *p;
 410
 411   if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp))
 412     return 0;
 413
 414   for (p = (grub_efi_device_path_t *) dp, next = GRUB_EFI_NEXT_DEVICE_PATH (p);
 415        ! GRUB_EFI_END_ENTIRE_DEVICE_PATH (next);
 416        p = next, next = GRUB_EFI_NEXT_DEVICE_PATH (next))
 417     ;
 418
 419   return p;
 420 }
 421
 422 /* Duplicate a device path.  */
 423 grub_efi_device_path_t *
 424 grub_efi_duplicate_device_path (const grub_efi_device_path_t *dp)
 425 {
 426   grub_efi_device_path_t *p;
 427   grub_size_t total_size = 0;
 428
 429   for (p = (grub_efi_device_path_t *) dp;
 430        ;
 431        p = GRUB_EFI_NEXT_DEVICE_PATH (p))
 432     {
 433       total_size += GRUB_EFI_DEVICE_PATH_LENGTH (p);
 434       if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (p))
 435         break;
 436     }
 437
 438   p = grub_malloc (total_size);
 439   if (! p)
 440     return 0;
 441
 442   grub_memcpy (p, dp, total_size);
 443   return p;
 444 }
 445
 446 static void
 447 dump_vendor_path (const char *type, grub_efi_vendor_device_path_t *vendor)
 448 {
 449   grub_uint32_t vendor_data_len = vendor->header.length - sizeof (*vendor);
 450   grub_printf ("/%sVendor(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)[%x: ",
 451                type,
 452                (unsigned) vendor->vendor_guid.data1,
 453                (unsigned) vendor->vendor_guid.data2,
 454                (unsigned) vendor->vendor_guid.data3,
 455                (unsigned) vendor->vendor_guid.data4[0],
 456                (unsigned) vendor->vendor_guid.data4[1],
 457                (unsigned) vendor->vendor_guid.data4[2],
 458                (unsigned) vendor->vendor_guid.data4[3],
 459                (unsigned) vendor->vendor_guid.data4[4],
 460                (unsigned) vendor->vendor_guid.data4[5],
 461                (unsigned) vendor->vendor_guid.data4[6],
 462                (unsigned) vendor->vendor_guid.data4[7],
 463                vendor_data_len);
 464   if (vendor->header.length > sizeof (*vendor))
 465     {
 466       grub_uint32_t i;
 467       for (i = 0; i < vendor_data_len; i++)
 468         grub_printf ("%02x ", vendor->vendor_defined_data[i]);
 469     }
 470   grub_printf ("]");
 471 }
 472
 473
 474 /* Print the chain of Device Path nodes. This is mainly for debugging. */
 475 void
 476 grub_efi_print_device_path (grub_efi_device_path_t *dp)
 477 {
 478   while (1)
 479     {
 480       grub_efi_uint8_t type = GRUB_EFI_DEVICE_PATH_TYPE (dp);
 481       grub_efi_uint8_t subtype = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp);
 482       grub_efi_uint16_t len = GRUB_EFI_DEVICE_PATH_LENGTH (dp);
 483
 484       switch (type)
 485         {
 486         case GRUB_EFI_END_DEVICE_PATH_TYPE:
 487           switch (subtype)
 488             {
 489             case GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE:
 490               grub_printf ("/EndEntire\n");
 491               //grub_putchar ('\n');
 492               break;
 493             case GRUB_EFI_END_THIS_DEVICE_PATH_SUBTYPE:
 494               grub_printf ("/EndThis\n");
 495               //grub_putchar ('\n');
 496               break;
 497             default:
 498               grub_printf ("/EndUnknown(%x)\n", (unsigned) subtype);
 499               break;
 500             }
 501           break;
 502
 503         case GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE:
 504           switch (subtype)
 505             {
 506             case GRUB_EFI_PCI_DEVICE_PATH_SUBTYPE:
 507               {
 508                 grub_efi_pci_device_path_t *pci
 509                   = (grub_efi_pci_device_path_t *) dp;
 510                 grub_printf ("/PCI(%x,%x)",
 511                              (unsigned) pci->function, (unsigned) pci->device);
 512               }
 513               break;
 514             case GRUB_EFI_PCCARD_DEVICE_PATH_SUBTYPE:
 515               {
 516                 grub_efi_pccard_device_path_t *pccard
 517                   = (grub_efi_pccard_device_path_t *) dp;
 518                 grub_printf ("/PCCARD(%x)",
 519                              (unsigned) pccard->function);
 520               }
 521               break;
 522             case GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE:
 523               {
 524                 grub_efi_memory_mapped_device_path_t *mmapped
 525                   = (grub_efi_memory_mapped_device_path_t *) dp;
 526                 grub_printf ("/MMap(%x,%llx,%llx)",
 527                              (unsigned) mmapped->memory_type,
 528                              (unsigned long long) mmapped->start_address,
 529                              (unsigned long long) mmapped->end_address);
 530               }
 531               break;
 532             case GRUB_EFI_VENDOR_DEVICE_PATH_SUBTYPE:
 533               dump_vendor_path ("Hardware",
 534                                 (grub_efi_vendor_device_path_t *) dp);
 535               break;
 536             case GRUB_EFI_CONTROLLER_DEVICE_PATH_SUBTYPE:
 537               {
 538                 grub_efi_controller_device_path_t *controller
 539                   = (grub_efi_controller_device_path_t *) dp;
 540                 grub_printf ("/Ctrl(%x)",
 541                              (unsigned) controller->controller_number);
 542               }
 543               break;
 544             default:
 545               grub_printf ("/UnknownHW(%x)", (unsigned) subtype);
 546               break;
 547             }
 548           break;
 549
 550         case GRUB_EFI_ACPI_DEVICE_PATH_TYPE:
 551           switch (subtype)
 552             {
 553             case GRUB_EFI_ACPI_DEVICE_PATH_SUBTYPE:
 554               {
 555                 grub_efi_acpi_device_path_t *acpi
 556                   = (grub_efi_acpi_device_path_t *) dp;
 557                 grub_printf ("/ACPI(%x,%x)",
 558                              (unsigned) acpi->hid,
 559                              (unsigned) acpi->uid);
 560               }
 561               break;
 562             case GRUB_EFI_EXPANDED_ACPI_DEVICE_PATH_SUBTYPE:
 563               {
 564                 grub_efi_expanded_acpi_device_path_t *eacpi
 565                   = (grub_efi_expanded_acpi_device_path_t *) dp;
 566                 grub_printf ("/ACPI(");
 567
 568                 if (GRUB_EFI_EXPANDED_ACPI_HIDSTR (dp)[0] == '\0')
 569                   grub_printf ("%x,", (unsigned) eacpi->hid);
 570                 else
 571                   grub_printf ("%s,", GRUB_EFI_EXPANDED_ACPI_HIDSTR (dp));
 572
 573                 if (GRUB_EFI_EXPANDED_ACPI_UIDSTR (dp)[0] == '\0')
 574                   grub_printf ("%x,", (unsigned) eacpi->uid);
 575                 else
 576                   grub_printf ("%s,", GRUB_EFI_EXPANDED_ACPI_UIDSTR (dp));
 577
 578                 if (GRUB_EFI_EXPANDED_ACPI_CIDSTR (dp)[0] == '\0')
 579                   grub_printf ("%x)", (unsigned) eacpi->cid);
 580                 else
 581                   grub_printf ("%s)", GRUB_EFI_EXPANDED_ACPI_CIDSTR (dp));
 582               }
 583               break;
 584             default:
 585               grub_printf ("/UnknownACPI(%x)", (unsigned) subtype);
 586               break;
 587             }
 588           break;
 589
 590         case GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE:
 591           switch (subtype)
 592             {
 593             case GRUB_EFI_ATAPI_DEVICE_PATH_SUBTYPE:
 594               {
 595                 grub_efi_atapi_device_path_t *atapi
 596                   = (grub_efi_atapi_device_path_t *) dp;
 597                 grub_printf ("/ATAPI(%x,%x,%x)",
 598                              (unsigned) atapi->primary_secondary,
 599                              (unsigned) atapi->slave_master,
 600                              (unsigned) atapi->lun);
 601               }
 602               break;
 603             case GRUB_EFI_SCSI_DEVICE_PATH_SUBTYPE:
 604               {
 605                 grub_efi_scsi_device_path_t *scsi
 606                   = (grub_efi_scsi_device_path_t *) dp;
 607                 grub_printf ("/SCSI(%x,%x)",
 608                              (unsigned) scsi->pun,
 609                              (unsigned) scsi->lun);
 610               }
 611               break;
 612             case GRUB_EFI_FIBRE_CHANNEL_DEVICE_PATH_SUBTYPE:
 613               {
 614                 grub_efi_fibre_channel_device_path_t *fc
 615                   = (grub_efi_fibre_channel_device_path_t *) dp;
 616                 grub_printf ("/FibreChannel(%llx,%llx)",
 617                              (unsigned long long) fc->wwn,
 618                              (unsigned long long) fc->lun);
 619               }
 620               break;
 621             case GRUB_EFI_1394_DEVICE_PATH_SUBTYPE:
 622               {
 623                 grub_efi_1394_device_path_t *firewire
 624                   = (grub_efi_1394_device_path_t *) dp;
 625                 grub_printf ("/1394(%llx)",
 626                              (unsigned long long) firewire->guid);
 627               }
 628               break;
 629             case GRUB_EFI_USB_DEVICE_PATH_SUBTYPE:
 630               {
 631                 grub_efi_usb_device_path_t *usb
 632                   = (grub_efi_usb_device_path_t *) dp;
 633                 grub_printf ("/USB(%x,%x)",
 634                              (unsigned) usb->parent_port_number,
 635                              (unsigned) usb->usb_interface);
 636               }
 637               break;
 638             case GRUB_EFI_USB_CLASS_DEVICE_PATH_SUBTYPE:
 639               {
 640                 grub_efi_usb_class_device_path_t *usb_class
 641                   = (grub_efi_usb_class_device_path_t *) dp;
 642                 grub_printf ("/USBClass(%x,%x,%x,%x,%x)",
 643                              (unsigned) usb_class->vendor_id,
 644                              (unsigned) usb_class->product_id,
 645                              (unsigned) usb_class->device_class,
 646                              (unsigned) usb_class->device_subclass,
 647                              (unsigned) usb_class->device_protocol);
 648               }
 649               break;
 650             case GRUB_EFI_I2O_DEVICE_PATH_SUBTYPE:
 651               {
 652                 grub_efi_i2o_device_path_t *i2o
 653                   = (grub_efi_i2o_device_path_t *) dp;
 654                 grub_printf ("/I2O(%x)", (unsigned) i2o->tid);
 655               }
 656               break;
 657             case GRUB_EFI_MAC_ADDRESS_DEVICE_PATH_SUBTYPE:
 658               {
 659                 grub_efi_mac_address_device_path_t *mac
 660                   = (grub_efi_mac_address_device_path_t *) dp;
 661                 grub_printf ("/MacAddr(%02x:%02x:%02x:%02x:%02x:%02x,%x)",
 662                              (unsigned) mac->mac_address[0],
 663                              (unsigned) mac->mac_address[1],
 664                              (unsigned) mac->mac_address[2],
 665                              (unsigned) mac->mac_address[3],
 666                              (unsigned) mac->mac_address[4],
 667                              (unsigned) mac->mac_address[5],
 668                              (unsigned) mac->if_type);
 669               }
 670               break;
 671             case GRUB_EFI_IPV4_DEVICE_PATH_SUBTYPE:
 672               {
 673                 grub_efi_ipv4_device_path_t *ipv4
 674                   = (grub_efi_ipv4_device_path_t *) dp;
 675                 grub_printf ("/IPv4(%u.%u.%u.%u,%u.%u.%u.%u,%u,%u,%x,%x)",
 676                              (unsigned) ipv4->local_ip_address[0],
 677                              (unsigned) ipv4->local_ip_address[1],
 678                              (unsigned) ipv4->local_ip_address[2],
 679                              (unsigned) ipv4->local_ip_address[3],
 680                              (unsigned) ipv4->remote_ip_address[0],
 681                              (unsigned) ipv4->remote_ip_address[1],
 682                              (unsigned) ipv4->remote_ip_address[2],
 683                              (unsigned) ipv4->remote_ip_address[3],
 684                              (unsigned) ipv4->local_port,
 685                              (unsigned) ipv4->remote_port,
 686                              (unsigned) ipv4->protocol,
 687                              (unsigned) ipv4->static_ip_address);
 688               }
 689               break;
 690             case GRUB_EFI_IPV6_DEVICE_PATH_SUBTYPE:
 691               {
 692                 grub_efi_ipv6_device_path_t *ipv6
 693                   = (grub_efi_ipv6_device_path_t *) dp;
 694                 grub_printf ("/IPv6(%x:%x:%x:%x:%x:%x:%x:%x,%x:%x:%x:%x:%x:%x:%x:%x,%u,%u,%x,%x)",
 695                              (unsigned) ipv6->local_ip_address[0],
 696                              (unsigned) ipv6->local_ip_address[1],
 697                              (unsigned) ipv6->local_ip_address[2],
 698                              (unsigned) ipv6->local_ip_address[3],
 699                              (unsigned) ipv6->local_ip_address[4],
 700                              (unsigned) ipv6->local_ip_address[5],
 701                              (unsigned) ipv6->local_ip_address[6],
 702                              (unsigned) ipv6->local_ip_address[7],
 703                              (unsigned) ipv6->remote_ip_address[0],
 704                              (unsigned) ipv6->remote_ip_address[1],
 705                              (unsigned) ipv6->remote_ip_address[2],
 706                              (unsigned) ipv6->remote_ip_address[3],
 707                              (unsigned) ipv6->remote_ip_address[4],
 708                              (unsigned) ipv6->remote_ip_address[5],
 709                              (unsigned) ipv6->remote_ip_address[6],
 710                              (unsigned) ipv6->remote_ip_address[7],
 711                              (unsigned) ipv6->local_port,
 712                              (unsigned) ipv6->remote_port,
 713                              (unsigned) ipv6->protocol,
 714                              (unsigned) ipv6->static_ip_address);
 715               }
 716               break;
 717             case GRUB_EFI_INFINIBAND_DEVICE_PATH_SUBTYPE:
 718               {
 719                 grub_efi_infiniband_device_path_t *ib
 720                   = (grub_efi_infiniband_device_path_t *) dp;
 721                 grub_printf ("/InfiniBand(%x,%llx,%llx,%llx)",
 722                              (unsigned) ib->port_gid[0], /* XXX */
 723                              (unsigned long long) ib->remote_id,
 724                              (unsigned long long) ib->target_port_id,
 725                              (unsigned long long) ib->device_id);
 726               }
 727               break;
 728             case GRUB_EFI_UART_DEVICE_PATH_SUBTYPE:
 729               {
 730                 grub_efi_uart_device_path_t *uart
 731                   = (grub_efi_uart_device_path_t *) dp;
 732                 grub_printf ("/UART(%llu,%u,%x,%x)",
 733                              (unsigned long long) uart->baud_rate,
 734                              uart->data_bits,
 735                              uart->parity,
 736                              uart->stop_bits);
 737               }
 738               break;
 739             case GRUB_EFI_SATA_DEVICE_PATH_SUBTYPE:
 740               {
 741                 grub_efi_sata_device_path_t *sata;
 742                 sata = (grub_efi_sata_device_path_t *) dp;
 743                 grub_printf ("/Sata(%x,%x,%x)",
 744                              sata->hba_port,
 745                              sata->multiplier_port,
 746                              sata->lun);
 747               }
 748               break;
 749
 750             case GRUB_EFI_VENDOR_MESSAGING_DEVICE_PATH_SUBTYPE:
 751               dump_vendor_path ("Messaging",
 752                                 (grub_efi_vendor_device_path_t *) dp);
 753               break;
 754             default:
 755               grub_printf ("/UnknownMessaging(%x)", (unsigned) subtype);
 756               break;
 757             }
 758           break;
 759
 760         case GRUB_EFI_MEDIA_DEVICE_PATH_TYPE:
 761           switch (subtype)
 762             {
 763             case GRUB_EFI_HARD_DRIVE_DEVICE_PATH_SUBTYPE:
 764               {
 765                 grub_efi_hard_drive_device_path_t *hd = (grub_efi_hard_drive_device_path_t *) dp;
 766                 grub_printf ("/HD(%u,%llx,%llx,%02x%02x%02x%02x%02x%02x%02x%02x,%x,%x)",
 767                              hd->partition_number,
 768                              (unsigned long long) hd->partition_start,
 769                              (unsigned long long) hd->partition_size,
 770                              (unsigned) hd->partition_signature[0],
 771                              (unsigned) hd->partition_signature[1],
 772                              (unsigned) hd->partition_signature[2],
 773                              (unsigned) hd->partition_signature[3],
 774                              (unsigned) hd->partition_signature[4],
 775                              (unsigned) hd->partition_signature[5],
 776                              (unsigned) hd->partition_signature[6],
 777                              (unsigned) hd->partition_signature[7],
 778                              (unsigned) hd->partmap_type,
 779                              (unsigned) hd->signature_type);
 780               }
 781               break;
 782             case GRUB_EFI_CDROM_DEVICE_PATH_SUBTYPE:
 783               {
 784                 grub_efi_cdrom_device_path_t *cd
 785                   = (grub_efi_cdrom_device_path_t *) dp;
 786                 grub_printf ("/CD(%u,%llx,%llx)",
 787                              cd->boot_entry,
 788                              (unsigned long long) cd->partition_start,
 789                              (unsigned long long) cd->partition_size);
 790               }
 791               break;
 792             case GRUB_EFI_VENDOR_MEDIA_DEVICE_PATH_SUBTYPE:
 793               dump_vendor_path ("Media",
 794                                 (grub_efi_vendor_device_path_t *) dp);
 795               break;
 796             case GRUB_EFI_FILE_PATH_DEVICE_PATH_SUBTYPE:
 797               {
 798                 grub_efi_file_path_device_path_t *fp;
 799                 grub_uint8_t *buf;
 800                 fp = (grub_efi_file_path_device_path_t *) dp;
 801                 buf = grub_malloc ((len - 4) * 2 + 1);
 802                 if (buf)
 803                   *grub_utf16_to_utf8 (buf, fp->path_name,
 804                                        (len - 4) / sizeof (grub_efi_char16_t))
 805                     = '\0';
 806                 else
 807                   grub_errno = GRUB_ERR_NONE;
 808                 grub_printf ("/File(%s)", buf);
 809                 grub_free (buf);
 810               }
 811               break;
 812             case GRUB_EFI_PROTOCOL_DEVICE_PATH_SUBTYPE:
 813               {
 814                 grub_efi_protocol_device_path_t *proto
 815                   = (grub_efi_protocol_device_path_t *) dp;
 816                 grub_printf ("/Protocol(%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x)",
 817                              (unsigned) proto->guid.data1,
 818                              (unsigned) proto->guid.data2,
 819                              (unsigned) proto->guid.data3,
 820                              (unsigned) proto->guid.data4[0],
 821                              (unsigned) proto->guid.data4[1],
 822                              (unsigned) proto->guid.data4[2],
 823                              (unsigned) proto->guid.data4[3],
 824                              (unsigned) proto->guid.data4[4],
 825                              (unsigned) proto->guid.data4[5],
 826                              (unsigned) proto->guid.data4[6],
 827                              (unsigned) proto->guid.data4[7]);
 828               }
 829               break;
 830             default:
 831               grub_printf ("/UnknownMedia(%x)", (unsigned) subtype);
 832               break;
 833             }
 834           break;
 835
 836         case GRUB_EFI_BIOS_DEVICE_PATH_TYPE:
 837           switch (subtype)
 838             {
 839             case GRUB_EFI_BIOS_DEVICE_PATH_SUBTYPE:
 840               {
 841                 grub_efi_bios_device_path_t *bios
 842                   = (grub_efi_bios_device_path_t *) dp;
 843                 grub_printf ("/BIOS(%x,%x,%s)",
 844                              (unsigned) bios->device_type,
 845                              (unsigned) bios->status_flags,
 846                              (char *) (dp + 1));
 847               }
 848               break;
 849             default:
 850               grub_printf ("/UnknownBIOS(%x)", (unsigned) subtype);
 851               break;
 852             }
 853           break;
 854
 855         default:
 856           grub_printf ("/UnknownType(%x,%x)\n",
 857                        (unsigned) type,
 858                        (unsigned) subtype);
 859           return;
 860           break;
 861         }
 862
 863       if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp))
 864         break;
 865
 866       dp = (grub_efi_device_path_t *) ((char *) dp + len);
 867     }
 868 }
 869
 870 /* Compare device paths.  */
 871 int
 872 grub_efi_compare_device_paths (const grub_efi_device_path_t *dp1,
 873                                const grub_efi_device_path_t *dp2)
 874 {
 875   if (! dp1 || ! dp2)
 876     /* Return non-zero.  */
 877     return 1;
 878
 879   while (1)
 880     {
 881       grub_efi_uint8_t type1, type2;
 882       grub_efi_uint8_t subtype1, subtype2;
 883       grub_efi_uint16_t len1, len2;
 884       int ret;
 885
 886       type1 = GRUB_EFI_DEVICE_PATH_TYPE (dp1);
 887       type2 = GRUB_EFI_DEVICE_PATH_TYPE (dp2);
 888
 889       if (type1 != type2)
 890         return (int) type2 - (int) type1;
 891
 892       subtype1 = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp1);
 893       subtype2 = GRUB_EFI_DEVICE_PATH_SUBTYPE (dp2);
 894
 895       if (subtype1 != subtype2)
 896         return (int) subtype1 - (int) subtype2;
 897
 898       len1 = GRUB_EFI_DEVICE_PATH_LENGTH (dp1);
 899       len2 = GRUB_EFI_DEVICE_PATH_LENGTH (dp2);
 900
 901       if (len1 != len2)
 902         return (int) len1 - (int) len2;
 903
 904       ret = grub_memcmp (dp1, dp2, len1);
 905       if (ret != 0)
 906         return ret;
 907
 908       if (GRUB_EFI_END_ENTIRE_DEVICE_PATH (dp1))
 909         break;
 910
 911       dp1 = (grub_efi_device_path_t *) ((char *) dp1 + len1);
 912       dp2 = (grub_efi_device_path_t *) ((char *) dp2 + len2);
 913     }
 914
 915   return 0;
 916 }