arch/all-pc/boot/grub2-aros/grub-core/commands/acpi.c

   1 /* acpi.c - modify acpi tables. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2009  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/dl.h>
  21 #include <grub/extcmd.h>
  22 #include <grub/file.h>
  23 #include <grub/disk.h>
  24 #include <grub/term.h>
  25 #include <grub/misc.h>
  26 #include <grub/acpi.h>
  27 #include <grub/mm.h>
  28 #include <grub/memory.h>
  29 #include <grub/i18n.h>
  30
  31 #ifdef GRUB_MACHINE_EFI
  32 #include <grub/efi/efi.h>
  33 #include <grub/efi/api.h>
  34 #endif
  35
  36 #pragma GCC diagnostic ignored "-Wcast-align"
  37
  38 GRUB_MOD_LICENSE ("GPLv3+");
  39
  40 static const struct grub_arg_option options[] = {
  41   {"exclude", 'x', 0,
  42    N_("Don't load host tables specified by comma-separated list."),
  43    0, ARG_TYPE_STRING},
  44   {"load-only", 'n', 0,
  45    N_("Load only tables specified by comma-separated list."), 0, ARG_TYPE_STRING},
  46   {"v1", '1', 0, N_("Export version 1 tables to the OS."), 0, ARG_TYPE_NONE},
  47   {"v2", '2', 0, N_("Export version 2 and version 3 tables to the OS."), 0, ARG_TYPE_NONE},
  48   {"oemid", 'o', 0, N_("Set OEMID of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
  49   {"oemtable", 't', 0,
  50    N_("Set OEMTABLE ID of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
  51   {"oemtablerev", 'r', 0,
  52    N_("Set OEMTABLE revision of RSDP, XSDT and RSDT."), 0, ARG_TYPE_INT},
  53   {"oemtablecreator", 'c', 0,
  54    N_("Set creator field of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
  55   {"oemtablecreatorrev", 'd', 0,
  56    N_("Set creator revision of RSDP, XSDT and RSDT."), 0, ARG_TYPE_INT},
  57   /* TRANSLATORS: "hangs" here is a noun, not a verb.  */
  58   {"no-ebda", 'e', 0, N_("Don't update EBDA. May fix failures or hangs on some "
  59    "BIOSes but makes it ineffective with OS not receiving RSDP from GRUB."),
  60    0, ARG_TYPE_NONE},
  61   {0, 0, 0, 0, 0, 0}
  62 };
  63
  64 /* Simple checksum by summing all bytes. Used by ACPI and SMBIOS. */
  65 grub_uint8_t
  66 grub_byte_checksum (void *base, grub_size_t size)
  67 {
  68   grub_uint8_t *ptr;
  69   grub_uint8_t ret = 0;
  70   for (ptr = (grub_uint8_t *) base; ptr < ((grub_uint8_t *) base) + size;
  71        ptr++)
  72     ret += *ptr;
  73   return ret;
  74 }
  75
  76 /* rev1 is 1 if ACPIv1 is to be generated, 0 otherwise.
  77    rev2 contains the revision of ACPIv2+ to generate or 0 if none. */
  78 static int rev1, rev2;
  79 /* OEMID of RSDP, RSDT and XSDT. */
  80 static char root_oemid[6];
  81 /* OEMTABLE of the same tables. */
  82 static char root_oemtable[8];
  83 /* OEMREVISION of the same tables. */
  84 static grub_uint32_t root_oemrev;
  85 /* CreatorID of the same tables. */
  86 static char root_creator_id[4];
  87 /* CreatorRevision of the same tables. */
  88 static grub_uint32_t root_creator_rev;
  89 static struct grub_acpi_rsdp_v10 *rsdpv1_new = 0;
  90 static struct grub_acpi_rsdp_v20 *rsdpv2_new = 0;
  91 static char *playground = 0, *playground_ptr = 0;
  92 static int playground_size = 0;
  93
  94 /* Linked list of ACPI tables. */
  95 struct efiemu_acpi_table
  96 {
  97   void *addr;
  98   grub_size_t size;
  99   struct efiemu_acpi_table *next;
 100 };
 101 static struct efiemu_acpi_table *acpi_tables = 0;
 102
 103 /* DSDT isn't in RSDT. So treat it specially. */
 104 static void *table_dsdt = 0;
 105 /* Pointer to recreated RSDT. */
 106 static void *rsdt_addr = 0;
 107
 108 /* Allocation handles for different tables. */
 109 static grub_size_t dsdt_size = 0;
 110
 111 /* Address of original FACS. */
 112 static grub_uint32_t facs_addr = 0;
 113
 114 struct grub_acpi_rsdp_v20 *
 115 grub_acpi_get_rsdpv2 (void)
 116 {
 117   if (rsdpv2_new)
 118     return rsdpv2_new;
 119   if (rsdpv1_new)
 120     return 0;
 121   return grub_machine_acpi_get_rsdpv2 ();
 122 }
 123
 124 struct grub_acpi_rsdp_v10 *
 125 grub_acpi_get_rsdpv1 (void)
 126 {
 127   if (rsdpv1_new)
 128     return rsdpv1_new;
 129   if (rsdpv2_new)
 130     return 0;
 131   return grub_machine_acpi_get_rsdpv1 ();
 132 }
 133
 134 static inline int
 135 iszero (grub_uint8_t *reg, int size)
 136 {
 137   int i;
 138   for (i = 0; i < size; i++)
 139     if (reg[i])
 140       return 0;
 141   return 1;
 142 }
 143
 144 #if defined (__i386__) || defined (__x86_64__)
 145 grub_err_t
 146 grub_acpi_create_ebda (void)
 147 {
 148   int ebda_kb_len;
 149   int ebda_len;
 150   int mmapregion = 0;
 151   grub_uint8_t *ebda, *v1inebda = 0, *v2inebda = 0;
 152   grub_uint64_t highestlow = 0;
 153   grub_uint8_t *targetebda, *target;
 154   struct grub_acpi_rsdp_v10 *v1;
 155   struct grub_acpi_rsdp_v20 *v2;
 156   auto int NESTED_FUNC_ATTR find_hook (grub_uint64_t, grub_uint64_t,
 157                                        grub_uint32_t);
 158   int NESTED_FUNC_ATTR find_hook (grub_uint64_t start, grub_uint64_t size,
 159                                   grub_memory_type_t type)
 160   {
 161     grub_uint64_t end = start + size;
 162     if (type != GRUB_MEMORY_AVAILABLE)
 163       return 0;
 164     if (end > 0x100000)
 165       end = 0x100000;
 166     if (end > start + ebda_len
 167         && highestlow < ((end - ebda_len) & (~0xf)) )
 168       highestlow = (end - ebda_len) & (~0xf);
 169     return 0;
 170   }
 171
 172   ebda = (grub_uint8_t *) (grub_addr_t) ((*((grub_uint16_t *)0x40e)) << 4);
 173   ebda_kb_len = *(grub_uint16_t *) ebda;
 174   if (! ebda || ebda_kb_len > 16)
 175     ebda_kb_len = 0;
 176   ebda_len = (ebda_kb_len + 1) << 10;
 177
 178   /* FIXME: use low-memory mm allocation once it's available. */
 179   grub_mmap_iterate (find_hook);
 180   targetebda = (grub_uint8_t *) (grub_addr_t) highestlow;
 181   grub_dprintf ("acpi", "creating ebda @%llx\n",
 182                 (unsigned long long) highestlow);
 183   if (! highestlow)
 184     return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 185                        "couldn't find space for the new EBDA");
 186
 187   mmapregion = grub_mmap_register ((grub_addr_t) targetebda, ebda_len,
 188                                    GRUB_MEMORY_RESERVED);
 189   if (! mmapregion)
 190     return grub_errno;
 191
 192   /* XXX: EBDA is unstandardized, so this implementation is heuristical. */
 193   if (ebda_kb_len)
 194     grub_memcpy (targetebda, ebda, 0x400);
 195   else
 196     grub_memset (targetebda, 0, 0x400);
 197   *((grub_uint16_t *) targetebda) = ebda_kb_len + 1;
 198   target = targetebda;
 199
 200   v1 = grub_acpi_get_rsdpv1 ();
 201   v2 = grub_acpi_get_rsdpv2 ();
 202   if (v2 && v2->length > 40)
 203     v2 = 0;
 204
 205   /* First try to replace already existing rsdp. */
 206   if (v2)
 207     {
 208       grub_dprintf ("acpi", "Scanning EBDA for old rsdpv2\n");
 209       for (; target < targetebda + 0x400 - v2->length; target += 0x10)
 210         if (grub_memcmp (target, "RSD PTR ", 8) == 0
 211             && grub_byte_checksum (target,
 212                                    sizeof (struct grub_acpi_rsdp_v10)) == 0
 213             && ((struct grub_acpi_rsdp_v10 *) target)->revision != 0
 214             && ((struct grub_acpi_rsdp_v20 *) target)->length <= v2->length)
 215           {
 216             grub_memcpy (target, v2, v2->length);
 217             grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
 218             v2inebda = target;
 219             target += v2->length;
 220             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 221             v2 = 0;
 222             break;
 223           }
 224     }
 225
 226   if (v1)
 227     {
 228       grub_dprintf ("acpi", "Scanning EBDA for old rsdpv1\n");
 229       for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 230            target += 0x10)
 231         if (grub_memcmp (target, "RSD PTR ", 8) == 0
 232             && grub_byte_checksum (target,
 233                                    sizeof (struct grub_acpi_rsdp_v10)) == 0)
 234           {
 235             grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
 236             grub_dprintf ("acpi", "Copying rsdpv1 to %p\n", target);
 237             v1inebda = target;
 238             target += sizeof (struct grub_acpi_rsdp_v10);
 239             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 240             v1 = 0;
 241             break;
 242           }
 243     }
 244
 245   target = targetebda + 0x100;
 246
 247   /* Try contiguous zeros. */
 248   if (v2)
 249     {
 250       grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
 251       for (; target < targetebda + 0x400 - v2->length; target += 0x10)
 252         if (iszero (target, v2->length))
 253           {
 254             grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
 255             grub_memcpy (target, v2, v2->length);
 256             v2inebda = target;
 257             target += v2->length;
 258             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 259             v2 = 0;
 260             break;
 261           }
 262     }
 263
 264   if (v1)
 265     {
 266       grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
 267       for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 268            target += 0x10)
 269         if (iszero (target, sizeof (struct grub_acpi_rsdp_v10)))
 270           {
 271             grub_dprintf ("acpi", "Copying rsdpv1 to %p\n", target);
 272             grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
 273             v1inebda = target;
 274             target += sizeof (struct grub_acpi_rsdp_v10);
 275             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 276             v1 = 0;
 277             break;
 278           }
 279     }
 280
 281   if (v1 || v2)
 282     {
 283       grub_mmap_unregister (mmapregion);
 284       return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 285                          "couldn't find suitable spot in EBDA");
 286     }
 287
 288   /* Remove any other RSDT. */
 289   for (target = targetebda;
 290        target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 291        target += 0x10)
 292     if (grub_memcmp (target, "RSD PTR ", 8) == 0
 293         && grub_byte_checksum (target,
 294                                sizeof (struct grub_acpi_rsdp_v10)) == 0
 295         && target != v1inebda && target != v2inebda)
 296       *target = 0;
 297
 298   grub_dprintf ("acpi", "Switching EBDA\n");
 299   (*((grub_uint16_t *) 0x40e)) = ((long)targetebda) >> 4;
 300   grub_dprintf ("acpi", "EBDA switched\n");
 301
 302   return GRUB_ERR_NONE;
 303 }
 304 #endif
 305
 306 /* Create tables common to ACPIv1 and ACPIv2+ */
 307 static void
 308 setup_common_tables (void)
 309 {
 310   struct efiemu_acpi_table *cur;
 311   struct grub_acpi_table_header *rsdt;
 312   grub_uint32_t *rsdt_entry;
 313   int numoftables;
 314
 315   /* Treat DSDT. */
 316   grub_memcpy (playground_ptr, table_dsdt, dsdt_size);
 317   grub_free (table_dsdt);
 318   table_dsdt = playground_ptr;
 319   playground_ptr += dsdt_size;
 320
 321   /* Treat other tables. */
 322   for (cur = acpi_tables; cur; cur = cur->next)
 323     {
 324       struct grub_acpi_fadt *fadt;
 325
 326       grub_memcpy (playground_ptr, cur->addr, cur->size);
 327       grub_free (cur->addr);
 328       cur->addr = playground_ptr;
 329       playground_ptr += cur->size;
 330
 331       /* If it's FADT correct DSDT and FACS addresses. */
 332       fadt = (struct grub_acpi_fadt *) cur->addr;
 333       if (grub_memcmp (fadt->hdr.signature, GRUB_ACPI_FADT_SIGNATURE,
 334                        sizeof (fadt->hdr.signature)) == 0)
 335         {
 336           fadt->dsdt_addr = (grub_addr_t) table_dsdt;
 337           fadt->facs_addr = facs_addr;
 338
 339           /* Does a revision 2 exist at all? */
 340           if (fadt->hdr.revision >= 3)
 341             {
 342               fadt->dsdt_xaddr = (grub_addr_t) table_dsdt;
 343               fadt->facs_xaddr = facs_addr;
 344             }
 345
 346           /* Recompute checksum. */
 347           fadt->hdr.checksum = 0;
 348           fadt->hdr.checksum = 1 + ~grub_byte_checksum (fadt, fadt->hdr.length);
 349         }
 350     }
 351
 352   /* Fill RSDT entries. */
 353   numoftables = 0;
 354   for (cur = acpi_tables; cur; cur = cur->next)
 355     numoftables++;
 356
 357   rsdt_addr = rsdt = (struct grub_acpi_table_header *) playground_ptr;
 358   playground_ptr += sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 359
 360   rsdt_entry = (grub_uint32_t *) (rsdt + 1);
 361
 362   /* Fill RSDT header. */
 363   grub_memcpy (&(rsdt->signature), "RSDT", 4);
 364   rsdt->length = sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 365   rsdt->revision = 1;
 366   grub_memcpy (&(rsdt->oemid), root_oemid, sizeof (rsdt->oemid));
 367   grub_memcpy (&(rsdt->oemtable), root_oemtable, sizeof (rsdt->oemtable));
 368   rsdt->oemrev = root_oemrev;
 369   grub_memcpy (&(rsdt->creator_id), root_creator_id, sizeof (rsdt->creator_id));
 370   rsdt->creator_rev = root_creator_rev;
 371
 372   for (cur = acpi_tables; cur; cur = cur->next)
 373     *(rsdt_entry++) = (grub_addr_t) cur->addr;
 374
 375   /* Recompute checksum. */
 376   rsdt->checksum = 0;
 377   rsdt->checksum = 1 + ~grub_byte_checksum (rsdt, rsdt->length);
 378 }
 379
 380 /* Regenerate ACPIv1 RSDP */
 381 static void
 382 setv1table (void)
 383 {
 384   /* Create RSDP. */
 385   rsdpv1_new = (struct grub_acpi_rsdp_v10 *) playground_ptr;
 386   playground_ptr += sizeof (struct grub_acpi_rsdp_v10);
 387   grub_memcpy (&(rsdpv1_new->signature), "RSD PTR ",
 388                sizeof (rsdpv1_new->signature));
 389   grub_memcpy (&(rsdpv1_new->oemid), root_oemid, sizeof  (rsdpv1_new->oemid));
 390   rsdpv1_new->revision = 0;
 391   rsdpv1_new->rsdt_addr = (grub_addr_t) rsdt_addr;
 392   rsdpv1_new->checksum = 0;
 393   rsdpv1_new->checksum = 1 + ~grub_byte_checksum (rsdpv1_new,
 394                                                   sizeof (*rsdpv1_new));
 395   grub_dprintf ("acpi", "Generated ACPIv1 tables\n");
 396 }
 397
 398 static void
 399 setv2table (void)
 400 {
 401   struct grub_acpi_table_header *xsdt;
 402   struct efiemu_acpi_table *cur;
 403   grub_uint64_t *xsdt_entry;
 404   int numoftables;
 405
 406   numoftables = 0;
 407   for (cur = acpi_tables; cur; cur = cur->next)
 408     numoftables++;
 409
 410   /* Create XSDT. */
 411   xsdt = (struct grub_acpi_table_header *) playground_ptr;
 412   playground_ptr += sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 413
 414   xsdt_entry = (grub_uint64_t *)(xsdt + 1);
 415   for (cur = acpi_tables; cur; cur = cur->next)
 416     *(xsdt_entry++) = (grub_addr_t) cur->addr;
 417   grub_memcpy (&(xsdt->signature), "XSDT", 4);
 418   xsdt->length = sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 419   xsdt->revision = 1;
 420   grub_memcpy (&(xsdt->oemid), root_oemid, sizeof (xsdt->oemid));
 421   grub_memcpy (&(xsdt->oemtable), root_oemtable, sizeof (xsdt->oemtable));
 422   xsdt->oemrev = root_oemrev;
 423   grub_memcpy (&(xsdt->creator_id), root_creator_id, sizeof (xsdt->creator_id));
 424   xsdt->creator_rev = root_creator_rev;
 425   xsdt->checksum = 0;
 426   xsdt->checksum = 1 + ~grub_byte_checksum (xsdt, xsdt->length);
 427
 428   /* Create RSDPv2. */
 429   rsdpv2_new = (struct grub_acpi_rsdp_v20 *) playground_ptr;
 430   playground_ptr += sizeof (struct grub_acpi_rsdp_v20);
 431   grub_memcpy (&(rsdpv2_new->rsdpv1.signature), "RSD PTR ",
 432                sizeof (rsdpv2_new->rsdpv1.signature));
 433   grub_memcpy (&(rsdpv2_new->rsdpv1.oemid), root_oemid,
 434                sizeof (rsdpv2_new->rsdpv1.oemid));
 435   rsdpv2_new->rsdpv1.revision = rev2;
 436   rsdpv2_new->rsdpv1.rsdt_addr = (grub_addr_t) rsdt_addr;
 437   rsdpv2_new->rsdpv1.checksum = 0;
 438   rsdpv2_new->rsdpv1.checksum = 1 + ~grub_byte_checksum
 439     (&(rsdpv2_new->rsdpv1), sizeof (rsdpv2_new->rsdpv1));
 440   rsdpv2_new->length = sizeof (*rsdpv2_new);
 441   rsdpv2_new->xsdt_addr = (grub_addr_t) xsdt;
 442   rsdpv2_new->checksum = 0;
 443   rsdpv2_new->checksum = 1 + ~grub_byte_checksum (rsdpv2_new,
 444                                                   rsdpv2_new->length);
 445   grub_dprintf ("acpi", "Generated ACPIv2 tables\n");
 446 }
 447
 448 static void
 449 free_tables (void)
 450 {
 451   struct efiemu_acpi_table *cur, *t;
 452   if (table_dsdt)
 453     grub_free (table_dsdt);
 454   for (cur = acpi_tables; cur;)
 455     {
 456       t = cur;
 457       grub_free (cur->addr);
 458       cur = cur->next;
 459       grub_free (t);
 460     }
 461   acpi_tables = 0;
 462   table_dsdt = 0;
 463 }
 464
 465 static grub_err_t
 466 grub_cmd_acpi (struct grub_extcmd_context *ctxt, int argc, char **args)
 467 {
 468   struct grub_arg_list *state = ctxt->state;
 469   struct grub_acpi_rsdp_v10 *rsdp;
 470   struct efiemu_acpi_table *cur, *t;
 471   int i, mmapregion;
 472   int numoftables;
 473
 474   /* Default values if no RSDP is found. */
 475   rev1 = 1;
 476   rev2 = 3;
 477
 478   facs_addr = 0;
 479   playground = playground_ptr = 0;
 480   playground_size = 0;
 481
 482   rsdp = (struct grub_acpi_rsdp_v10 *) grub_machine_acpi_get_rsdpv2 ();
 483
 484   if (! rsdp)
 485     rsdp = grub_machine_acpi_get_rsdpv1 ();
 486
 487   if (rsdp)
 488     {
 489       grub_uint32_t *entry_ptr;
 490       char *exclude = 0;
 491       char *load_only = 0;
 492       char *ptr;
 493       /* RSDT consists of header and an array of 32-bit pointers. */
 494       struct grub_acpi_table_header *rsdt;
 495
 496       exclude = state[0].set ? grub_strdup (state[0].arg) : 0;
 497       if (exclude)
 498         {
 499           for (ptr = exclude; *ptr; ptr++)
 500             *ptr = grub_tolower (*ptr);
 501         }
 502
 503       load_only = state[1].set ? grub_strdup (state[1].arg) : 0;
 504       if (load_only)
 505         {
 506           for (ptr = load_only; *ptr; ptr++)
 507             *ptr = grub_tolower (*ptr);
 508         }
 509
 510       /* Set revision variables to replicate the same version as host. */
 511       rev1 = ! rsdp->revision;
 512       rev2 = rsdp->revision;
 513       rsdt = (struct grub_acpi_table_header *) (grub_addr_t) rsdp->rsdt_addr;
 514       /* Load host tables. */
 515       for (entry_ptr = (grub_uint32_t *) (rsdt + 1);
 516            entry_ptr < (grub_uint32_t *) (((grub_uint8_t *) rsdt)
 517                                           + rsdt->length);
 518            entry_ptr++)
 519         {
 520           char signature[5];
 521           struct efiemu_acpi_table *table;
 522           struct grub_acpi_table_header *curtable
 523             = (struct grub_acpi_table_header *) (grub_addr_t) *entry_ptr;
 524           signature[4] = 0;
 525           for (i = 0; i < 4;i++)
 526             signature[i] = grub_tolower (curtable->signature[i]);
 527
 528           /* If it's FADT it contains addresses of DSDT and FACS. */
 529           if (grub_strcmp (signature, "facp") == 0)
 530             {
 531               struct grub_acpi_table_header *dsdt;
 532               struct grub_acpi_fadt *fadt = (struct grub_acpi_fadt *) curtable;
 533
 534               /* Set root header variables to the same values
 535                  as FADT by default. */
 536               grub_memcpy (&root_oemid, &(fadt->hdr.oemid),
 537                            sizeof (root_oemid));
 538               grub_memcpy (&root_oemtable, &(fadt->hdr.oemtable),
 539                            sizeof (root_oemtable));
 540               root_oemrev = fadt->hdr.oemrev;
 541               grub_memcpy (&root_creator_id, &(fadt->hdr.creator_id),
 542                            sizeof (root_creator_id));
 543               root_creator_rev = fadt->hdr.creator_rev;
 544
 545               /* Load DSDT if not excluded. */
 546               dsdt = (struct grub_acpi_table_header *)
 547                 (grub_addr_t) fadt->dsdt_addr;
 548               if (dsdt && (! exclude || ! grub_strword (exclude, "dsdt"))
 549                   && (! load_only || grub_strword (load_only, "dsdt"))
 550                   && dsdt->length >= sizeof (*dsdt))
 551                 {
 552                   dsdt_size = dsdt->length;
 553                   table_dsdt = grub_malloc (dsdt->length);
 554                   if (! table_dsdt)
 555                     {
 556                       free_tables ();
 557                       grub_free (exclude);
 558                       grub_free (load_only);
 559                       return grub_errno;
 560                     }
 561                   grub_memcpy (table_dsdt, dsdt, dsdt->length);
 562                 }
 563
 564               /* Save FACS address. FACS shouldn't be overridden. */
 565               facs_addr = fadt->facs_addr;
 566             }
 567
 568           /* Skip excluded tables. */
 569           if (exclude && grub_strword (exclude, signature))
 570             continue;
 571           if (load_only && ! grub_strword (load_only, signature))
 572             continue;
 573
 574           /* Sanity check. */
 575           if (curtable->length < sizeof (*curtable))
 576             continue;
 577
 578           table = (struct efiemu_acpi_table *) grub_malloc
 579             (sizeof (struct efiemu_acpi_table));
 580           if (! table)
 581             {
 582               free_tables ();
 583               grub_free (exclude);
 584               grub_free (load_only);
 585               return grub_errno;
 586             }
 587           table->size = curtable->length;
 588           table->addr = grub_malloc (table->size);
 589           playground_size += table->size;
 590           if (! table->addr)
 591             {
 592               free_tables ();
 593               return grub_errno;
 594             }
 595           table->next = acpi_tables;
 596           acpi_tables = table;
 597           grub_memcpy (table->addr, curtable, table->size);
 598         }
 599       grub_free (exclude);
 600       grub_free (load_only);
 601     }
 602
 603   /* Does user specify versions to generate? */
 604   if (state[2].set || state[3].set)
 605     {
 606       rev1 = state[2].set;
 607       if (state[3].set)
 608         rev2 = rev2 ? : 2;
 609       else
 610         rev2 = 0;
 611     }
 612
 613   /* Does user override root header information? */
 614   if (state[4].set)
 615     grub_strncpy (root_oemid, state[4].arg, sizeof (root_oemid));
 616   if (state[5].set)
 617     grub_strncpy (root_oemtable, state[5].arg, sizeof (root_oemtable));
 618   if (state[6].set)
 619     root_oemrev = grub_strtoul (state[6].arg, 0, 0);
 620   if (state[7].set)
 621     grub_strncpy (root_creator_id, state[7].arg, sizeof (root_creator_id));
 622   if (state[8].set)
 623     root_creator_rev = grub_strtoul (state[8].arg, 0, 0);
 624
 625   /* Load user tables */
 626   for (i = 0; i < argc; i++)
 627     {
 628       grub_file_t file;
 629       grub_size_t size;
 630       char *buf;
 631
 632       file = grub_file_open (args[i]);
 633       if (! file)
 634         {
 635           free_tables ();
 636           return grub_errno;
 637         }
 638
 639       size = grub_file_size (file);
 640       if (size < sizeof (struct grub_acpi_table_header))
 641         {
 642           grub_file_close (file);
 643           free_tables ();
 644           return grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
 645                              args[i]);
 646         }
 647
 648       buf = (char *) grub_malloc (size);
 649       if (! buf)
 650         {
 651           grub_file_close (file);
 652           free_tables ();
 653           return grub_errno;
 654         }
 655
 656       if (grub_file_read (file, buf, size) != (int) size)
 657         {
 658           grub_file_close (file);
 659           free_tables ();
 660           if (!grub_errno)
 661             grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
 662                         args[i]);
 663           return grub_errno;
 664         }
 665       grub_file_close (file);
 666
 667       if (grub_memcmp (((struct grub_acpi_table_header *) buf)->signature,
 668                        "DSDT", 4) == 0)
 669         {
 670           grub_free (table_dsdt);
 671           table_dsdt = buf;
 672           dsdt_size = size;
 673         }
 674       else
 675         {
 676           struct efiemu_acpi_table *table;
 677           table = (struct efiemu_acpi_table *) grub_malloc
 678             (sizeof (struct efiemu_acpi_table));
 679           if (! table)
 680             {
 681               free_tables ();
 682               return grub_errno;
 683             }
 684
 685           table->size = size;
 686           table->addr = buf;
 687           playground_size += table->size;
 688
 689           table->next = acpi_tables;
 690           acpi_tables = table;
 691         }
 692     }
 693
 694   numoftables = 0;
 695   for (cur = acpi_tables; cur; cur = cur->next)
 696     numoftables++;
 697
 698   /* DSDT. */
 699   playground_size += dsdt_size;
 700   /* RSDT. */
 701   playground_size += sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 702   /* RSDPv1. */
 703   playground_size += sizeof (struct grub_acpi_rsdp_v10);
 704   /* XSDT. */
 705   playground_size += sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 706   /* RSDPv2. */
 707   playground_size += sizeof (struct grub_acpi_rsdp_v20);
 708
 709   playground = playground_ptr
 710     = grub_mmap_malign_and_register (1, playground_size, &mmapregion,
 711                                      GRUB_MEMORY_ACPI, 0);
 712
 713   if (! playground)
 714     {
 715       free_tables ();
 716       return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 717                          "couldn't allocate space for ACPI tables");
 718     }
 719
 720   setup_common_tables ();
 721
 722   /* Request space for RSDPv1. */
 723   if (rev1)
 724     setv1table ();
 725
 726   /* Request space for RSDPv2+ and XSDT. */
 727   if (rev2)
 728     setv2table ();
 729
 730   for (cur = acpi_tables; cur;)
 731     {
 732       t = cur;
 733       cur = cur->next;
 734       grub_free (t);
 735     }
 736   acpi_tables = 0;
 737
 738 #if defined (__i386__) || defined (__x86_64__)
 739   if (! state[9].set)
 740     {
 741       grub_err_t err;
 742       err = grub_acpi_create_ebda ();
 743       if (err)
 744         {
 745           rsdpv1_new = 0;
 746           rsdpv2_new = 0;
 747           grub_mmap_free_and_unregister (mmapregion);
 748           return err;
 749         }
 750     }
 751 #endif
 752
 753 #ifdef GRUB_MACHINE_EFI
 754   {
 755     struct grub_efi_guid acpi = GRUB_EFI_ACPI_TABLE_GUID;
 756     struct grub_efi_guid acpi20 = GRUB_EFI_ACPI_20_TABLE_GUID;
 757
 758     grub_efi_system_table->boot_services->install_configuration_table
 759       (&acpi20, grub_acpi_get_rsdpv2 ());
 760     grub_efi_system_table->boot_services->install_configuration_table
 761       (&acpi, grub_acpi_get_rsdpv1 ());
 762   }
 763 #endif
 764
 765   return GRUB_ERR_NONE;
 766 }
 767
 768 static grub_extcmd_t cmd;
 769
 770 GRUB_MOD_INIT(acpi)
 771 {
 772   cmd = grub_register_extcmd ("acpi", grub_cmd_acpi, 0,
 773                               N_("[-1|-2] [--exclude=TABLE1,TABLE2|"
 774                               "--load-only=TABLE1,TABLE2] FILE1"
 775                               " [FILE2] [...]"),
 776                               N_("Load host ACPI tables and tables "
 777                               "specified by arguments."),
 778                               options);
 779 }
 780
 781 GRUB_MOD_FINI(acpi)
 782 {
 783   grub_unregister_extcmd (cmd);
 784 }