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/gzio.h>
  27 #include <grub/acpi.h>
  28 #include <grub/mm.h>
  29 #include <grub/machine/machine.h>
  30 #include <grub/machine/memory.h>
  31 #include <grub/memory.h>
  32
  33 #ifdef GRUB_MACHINE_EFI
  34 #include <grub/efi/efi.h>
  35 #include <grub/efi/api.h>
  36 #endif
  37
  38 static const struct grub_arg_option options[] = {
  39   {"exclude", 'x', 0,
  40    "Don't load host tables specified by comma-separated list",
  41    0, ARG_TYPE_STRING},
  42   {"load-only", 'n', 0,
  43    "Load only tables specified by comma-separated list", 0, ARG_TYPE_STRING},
  44   {"v1", '1', 0, "Expose v1 tables", 0, ARG_TYPE_NONE},
  45   {"v2", '2', 0, "Expose v2 and v3 tables", 0, ARG_TYPE_NONE},
  46   {"oemid", 'o', 0, "Set OEMID of RSDP, XSDT and RSDT", 0, ARG_TYPE_STRING},
  47   {"oemtable", 't', 0,
  48    "Set OEMTABLE ID of RSDP, XSDT and RSDT", 0, ARG_TYPE_STRING},
  49   {"oemtablerev", 'r', 0,
  50    "Set OEMTABLE revision of RSDP, XSDT and RSDT", 0, ARG_TYPE_INT},
  51   {"oemtablecreator", 'c', 0,
  52    "Set creator field of RSDP, XSDT and RSDT", 0, ARG_TYPE_STRING},
  53   {"oemtablecreatorrev", 'd', 0,
  54    "Set creator revision of RSDP, XSDT and RSDT", 0, ARG_TYPE_INT},
  55   {"no-ebda", 'e', 0, "Don't update EBDA. May fix failures or hangs on some"
  56    " BIOSes but makes it ineffective with OS not receiving RSDP from GRUB",
  57    0, ARG_TYPE_NONE},
  58   {0, 0, 0, 0, 0, 0}
  59 };
  60
  61 /* Simple checksum by summing all bytes. Used by ACPI and SMBIOS. */
  62 grub_uint8_t
  63 grub_byte_checksum (void *base, grub_size_t size)
  64 {
  65   grub_uint8_t *ptr;
  66   grub_uint8_t ret = 0;
  67   for (ptr = (grub_uint8_t *) base; ptr < ((grub_uint8_t *) base) + size;
  68        ptr++)
  69     ret += *ptr;
  70   return ret;
  71 }
  72
  73 /* rev1 is 1 if ACPIv1 is to be generated, 0 otherwise.
  74    rev2 contains the revision of ACPIv2+ to generate or 0 if none. */
  75 static int rev1, rev2;
  76 /* OEMID of RSDP, RSDT and XSDT. */
  77 static char root_oemid[6];
  78 /* OEMTABLE of the same tables. */
  79 static char root_oemtable[8];
  80 /* OEMREVISION of the same tables. */
  81 static grub_uint32_t root_oemrev;
  82 /* CreatorID of the same tables. */
  83 static char root_creator_id[4];
  84 /* CreatorRevision of the same tables. */
  85 static grub_uint32_t root_creator_rev;
  86 static struct grub_acpi_rsdp_v10 *rsdpv1_new = 0;
  87 static struct grub_acpi_rsdp_v20 *rsdpv2_new = 0;
  88 static char *playground = 0, *playground_ptr = 0;
  89 static int playground_size = 0;
  90
  91 /* Linked list of ACPI tables. */
  92 struct efiemu_acpi_table
  93 {
  94   void *addr;
  95   grub_size_t size;
  96   struct efiemu_acpi_table *next;
  97 };
  98 static struct efiemu_acpi_table *acpi_tables = 0;
  99
 100 /* DSDT isn't in RSDT. So treat it specially. */
 101 static void *table_dsdt = 0;
 102 /* Pointer to recreated RSDT. */
 103 static void *rsdt_addr = 0;
 104
 105 /* Allocation handles for different tables. */
 106 static grub_size_t dsdt_size = 0;
 107
 108 /* Address of original FACS. */
 109 static grub_uint32_t facs_addr = 0;
 110
 111 struct grub_acpi_rsdp_v20 *
 112 grub_acpi_get_rsdpv2 (void)
 113 {
 114   if (rsdpv2_new)
 115     return rsdpv2_new;
 116   if (rsdpv1_new)
 117     return 0;
 118   return grub_machine_acpi_get_rsdpv2 ();
 119 }
 120
 121 struct grub_acpi_rsdp_v10 *
 122 grub_acpi_get_rsdpv1 (void)
 123 {
 124   if (rsdpv1_new)
 125     return rsdpv1_new;
 126   if (rsdpv2_new)
 127     return 0;
 128   return grub_machine_acpi_get_rsdpv1 ();
 129 }
 130
 131 static inline int
 132 iszero (grub_uint8_t *reg, int size)
 133 {
 134   int i;
 135   for (i = 0; i < size; i++)
 136     if (reg[i])
 137       return 0;
 138   return 1;
 139 }
 140
 141 grub_err_t
 142 grub_acpi_create_ebda (void)
 143 {
 144   int ebda_kb_len;
 145   int ebda_len;
 146   int mmapregion = 0;
 147   grub_uint8_t *ebda, *v1inebda = 0, *v2inebda = 0;
 148   grub_uint64_t highestlow = 0;
 149   grub_uint8_t *targetebda, *target;
 150   struct grub_acpi_rsdp_v10 *v1;
 151   struct grub_acpi_rsdp_v20 *v2;
 152   auto int NESTED_FUNC_ATTR find_hook (grub_uint64_t, grub_uint64_t,
 153                                        grub_uint32_t);
 154   int NESTED_FUNC_ATTR find_hook (grub_uint64_t start, grub_uint64_t size,
 155                                   grub_uint32_t type)
 156   {
 157     grub_uint64_t end = start + size;
 158     if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
 159       return 0;
 160     if (end > 0x100000)
 161       end = 0x100000;
 162     if (end > start + ebda_len
 163         && highestlow < ((end - ebda_len) & (~0xf)) )
 164       highestlow = (end - ebda_len) & (~0xf);
 165     return 0;
 166   }
 167
 168   ebda = (grub_uint8_t *) UINT_TO_PTR ((*((grub_uint16_t *)0x40e)) << 4);
 169   ebda_kb_len = *(grub_uint16_t *) ebda;
 170   if (! ebda || ebda_kb_len > 16)
 171     ebda_kb_len = 0;
 172   ebda_len = (ebda_kb_len + 1) << 10;
 173
 174   /* FIXME: use low-memory mm allocation once it's available. */
 175   grub_mmap_iterate (find_hook);
 176   targetebda = (grub_uint8_t *) UINT_TO_PTR (highestlow);
 177   grub_dprintf ("acpi", "creating ebda @%llx\n",
 178                 (unsigned long long) highestlow);
 179   if (! highestlow)
 180     return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 181                        "couldn't find space for the new EBDA");
 182
 183   mmapregion = grub_mmap_register (PTR_TO_UINT64 (targetebda), ebda_len,
 184                                    GRUB_MACHINE_MEMORY_RESERVED);
 185   if (! mmapregion)
 186     return grub_errno;
 187
 188   /* XXX: EBDA is unstandardized, so this implementation is heuristical. */
 189   if (ebda_kb_len)
 190     grub_memcpy (targetebda, ebda, 0x400);
 191   else
 192     grub_memset (targetebda, 0, 0x400);
 193   *((grub_uint16_t *) targetebda) = ebda_kb_len + 1;
 194   target = targetebda;
 195
 196   v1 = grub_acpi_get_rsdpv1 ();
 197   v2 = grub_acpi_get_rsdpv2 ();
 198   if (v2 && v2->length > 40)
 199     v2 = 0;
 200
 201   /* First try to replace already existing rsdp. */
 202   if (v2)
 203     {
 204       grub_dprintf ("acpi", "Scanning EBDA for old rsdpv2\n");
 205       for (; target < targetebda + 0x400 - v2->length; target += 0x10)
 206         if (grub_memcmp (target, "RSD PTR ", 8) == 0
 207             && grub_byte_checksum (target,
 208                                    sizeof (struct grub_acpi_rsdp_v10)) == 0
 209             && ((struct grub_acpi_rsdp_v10 *) target)->revision != 0
 210             && ((struct grub_acpi_rsdp_v20 *) target)->length <= v2->length)
 211           {
 212             grub_memcpy (target, v2, v2->length);
 213             grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
 214             v2inebda = target;
 215             target += v2->length;
 216             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 217             v2 = 0;
 218             break;
 219           }
 220     }
 221
 222   if (v1)
 223     {
 224       grub_dprintf ("acpi", "Scanning EBDA for old rsdpv1\n");
 225       for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 226            target += 0x10)
 227         if (grub_memcmp (target, "RSD PTR ", 8) == 0
 228             && grub_byte_checksum (target,
 229                                    sizeof (struct grub_acpi_rsdp_v10)) == 0)
 230           {
 231             grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
 232             grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
 233             v1inebda = target;
 234             target += sizeof (struct grub_acpi_rsdp_v10);
 235             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 236             v1 = 0;
 237             break;
 238           }
 239     }
 240
 241   target = targetebda + 0x100;
 242
 243   /* Try contiguous zeros. */
 244   if (v2)
 245     {
 246       grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
 247       for (; target < targetebda + 0x400 - v2->length; target += 0x10)
 248         if (iszero (target, v2->length))
 249           {
 250             grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
 251             grub_memcpy (target, v2, v2->length);
 252             v2inebda = target;
 253             target += v2->length;
 254             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 255             v2 = 0;
 256             break;
 257           }
 258     }
 259
 260   if (v1)
 261     {
 262       grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
 263       for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 264            target += 0x10)
 265         if (iszero (target, sizeof (struct grub_acpi_rsdp_v10)))
 266           {
 267             grub_dprintf ("acpi", "Copying rsdpv1 to %p\n", target);
 268             grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
 269             v1inebda = target;
 270             target += sizeof (struct grub_acpi_rsdp_v10);
 271             target = (grub_uint8_t *) ((((long) target - 1) | 0xf) + 1);
 272             v1 = 0;
 273             break;
 274           }
 275     }
 276
 277   if (v1 || v2)
 278     {
 279       grub_mmap_unregister (mmapregion);
 280       return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 281                          "Couldn't find suitable spot in EBDA");
 282     }
 283
 284   /* Remove any other RSDT. */
 285   for (target = targetebda;
 286        target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
 287        target += 0x10)
 288     if (grub_memcmp (target, "RSD PTR ", 8) == 0
 289         && grub_byte_checksum (target,
 290                                sizeof (struct grub_acpi_rsdp_v10)) == 0
 291         && target != v1inebda && target != v2inebda)
 292       *target = 0;
 293
 294   grub_dprintf ("acpi", "Switching EBDA\n");
 295   (*((grub_uint16_t *) 0x40e)) = ((long)targetebda) >> 4;
 296   grub_dprintf ("acpi", "EBDA switched\n");
 297
 298   return GRUB_ERR_NONE;
 299 }
 300
 301 /* Create tables common to ACPIv1 and ACPIv2+ */
 302 static void
 303 setup_common_tables (void)
 304 {
 305   struct efiemu_acpi_table *cur;
 306   struct grub_acpi_table_header *rsdt;
 307   grub_uint32_t *rsdt_entry;
 308   int numoftables;
 309
 310   /* Treat DSDT. */
 311   grub_memcpy (playground_ptr, table_dsdt, dsdt_size);
 312   grub_free (table_dsdt);
 313   table_dsdt = playground_ptr;
 314   playground_ptr += dsdt_size;
 315
 316   /* Treat other tables. */
 317   for (cur = acpi_tables; cur; cur = cur->next)
 318     {
 319       struct grub_acpi_fadt *fadt;
 320
 321       grub_memcpy (playground_ptr, cur->addr, cur->size);
 322       grub_free (cur->addr);
 323       cur->addr = playground_ptr;
 324       playground_ptr += cur->size;
 325
 326       /* If it's FADT correct DSDT and FACS addresses. */
 327       fadt = (struct grub_acpi_fadt *) cur->addr;
 328       if (grub_memcmp (fadt->hdr.signature, "FACP", 4) == 0)
 329         {
 330           fadt->dsdt_addr = PTR_TO_UINT32 (table_dsdt);
 331           fadt->facs_addr = facs_addr;
 332
 333           /* Does a revision 2 exist at all? */
 334           if (fadt->hdr.revision >= 3)
 335             {
 336               fadt->dsdt_xaddr = PTR_TO_UINT64 (table_dsdt);
 337               fadt->facs_xaddr = facs_addr;
 338             }
 339
 340           /* Recompute checksum. */
 341           fadt->hdr.checksum = 0;
 342           fadt->hdr.checksum = 1 + ~grub_byte_checksum (fadt, fadt->hdr.length);
 343         }
 344     }
 345
 346   /* Fill RSDT entries. */
 347   numoftables = 0;
 348   for (cur = acpi_tables; cur; cur = cur->next)
 349     numoftables++;
 350
 351   rsdt_addr = rsdt = (struct grub_acpi_table_header *) playground_ptr;
 352   playground_ptr += sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 353
 354   rsdt_entry = (grub_uint32_t *)(rsdt + 1);
 355
 356   /* Fill RSDT header. */
 357   grub_memcpy (&(rsdt->signature), "RSDT", 4);
 358   rsdt->length = sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 359   rsdt->revision = 1;
 360   grub_memcpy (&(rsdt->oemid), root_oemid, 6);
 361   grub_memcpy (&(rsdt->oemtable), root_oemtable, 4);
 362   rsdt->oemrev = root_oemrev;
 363   grub_memcpy (&(rsdt->creator_id), root_creator_id, 6);
 364   rsdt->creator_rev = root_creator_rev;
 365
 366   for (cur = acpi_tables; cur; cur = cur->next)
 367     *(rsdt_entry++) = PTR_TO_UINT32 (cur->addr);
 368
 369   /* Recompute checksum. */
 370   rsdt->checksum = 0;
 371   rsdt->checksum = 1 + ~grub_byte_checksum (rsdt, rsdt->length);
 372 }
 373
 374 /* Regenerate ACPIv1 RSDP */
 375 static void
 376 setv1table (void)
 377 {
 378   /* Create RSDP. */
 379   rsdpv1_new = (struct grub_acpi_rsdp_v10 *) playground_ptr;
 380   playground_ptr += sizeof (struct grub_acpi_rsdp_v10);
 381   grub_memcpy (&(rsdpv1_new->signature), "RSD PTR ", 8);
 382   grub_memcpy (&(rsdpv1_new->oemid), root_oemid, sizeof  (rsdpv1_new->oemid));
 383   rsdpv1_new->revision = 0;
 384   rsdpv1_new->rsdt_addr = PTR_TO_UINT32 (rsdt_addr);
 385   rsdpv1_new->checksum = 0;
 386   rsdpv1_new->checksum = 1 + ~grub_byte_checksum (rsdpv1_new,
 387                                                   sizeof (*rsdpv1_new));
 388   grub_dprintf ("acpi", "Generated ACPIv1 tables\n");
 389 }
 390
 391 static void
 392 setv2table (void)
 393 {
 394   struct grub_acpi_table_header *xsdt;
 395   struct efiemu_acpi_table *cur;
 396   grub_uint64_t *xsdt_entry;
 397   int numoftables;
 398
 399   numoftables = 0;
 400   for (cur = acpi_tables; cur; cur = cur->next)
 401     numoftables++;
 402
 403   /* Create XSDT. */
 404   xsdt = (struct grub_acpi_table_header *) playground_ptr;
 405   playground_ptr += sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 406
 407   xsdt_entry = (grub_uint64_t *)(xsdt + 1);
 408   for (cur = acpi_tables; cur; cur = cur->next)
 409     *(xsdt_entry++) = PTR_TO_UINT64 (cur->addr);
 410   grub_memcpy (&(xsdt->signature), "XSDT", 4);
 411   xsdt->length = sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 412   xsdt->revision = 1;
 413   grub_memcpy (&(xsdt->oemid), root_oemid, sizeof (xsdt->oemid));
 414   grub_memcpy (&(xsdt->oemtable), root_oemtable, sizeof (xsdt->oemtable));
 415   xsdt->oemrev = root_oemrev;
 416   grub_memcpy (&(xsdt->creator_id), root_creator_id, sizeof (xsdt->creator_id));
 417   xsdt->creator_rev = root_creator_rev;
 418   xsdt->checksum = 0;
 419   xsdt->checksum = 1 + ~grub_byte_checksum (xsdt, xsdt->length);
 420
 421   /* Create RSDPv2. */
 422   rsdpv2_new = (struct grub_acpi_rsdp_v20 *) playground_ptr;
 423   playground_ptr += sizeof (struct grub_acpi_rsdp_v20);
 424   grub_memcpy (&(rsdpv2_new->rsdpv1.signature), "RSD PTR ",
 425                sizeof (rsdpv2_new->rsdpv1.signature));
 426   grub_memcpy (&(rsdpv2_new->rsdpv1.oemid), root_oemid,
 427                sizeof (rsdpv2_new->rsdpv1.oemid));
 428   rsdpv2_new->rsdpv1.revision = rev2;
 429   rsdpv2_new->rsdpv1.rsdt_addr = PTR_TO_UINT32 (rsdt_addr);
 430   rsdpv2_new->rsdpv1.checksum = 0;
 431   rsdpv2_new->rsdpv1.checksum = 1 + ~grub_byte_checksum
 432     (&(rsdpv2_new->rsdpv1), sizeof (rsdpv2_new->rsdpv1));
 433   rsdpv2_new->length = sizeof (*rsdpv2_new);
 434   rsdpv2_new->xsdt_addr = PTR_TO_UINT64 (xsdt);
 435   rsdpv2_new->checksum = 0;
 436   rsdpv2_new->checksum = 1 + ~grub_byte_checksum (rsdpv2_new,
 437                                                   rsdpv2_new->length);
 438   grub_dprintf ("acpi", "Generated ACPIv2 tables\n");
 439 }
 440
 441 static void
 442 free_tables (void)
 443 {
 444   struct efiemu_acpi_table *cur, *t;
 445   if (table_dsdt)
 446     grub_free (table_dsdt);
 447   for (cur = acpi_tables; cur;)
 448     {
 449       t = cur;
 450       grub_free (cur->addr);
 451       cur = cur->next;
 452       grub_free (t);
 453     }
 454   acpi_tables = 0;
 455   table_dsdt = 0;
 456 }
 457
 458 static grub_err_t
 459 grub_cmd_acpi (struct grub_extcmd *cmd,
 460                       int argc, char **args)
 461 {
 462   struct grub_arg_list *state = cmd->state;
 463   struct grub_acpi_rsdp_v10 *rsdp;
 464   struct efiemu_acpi_table *cur, *t;
 465   grub_err_t err;
 466   int i, mmapregion;
 467   int numoftables;
 468
 469   /* Default values if no RSDP is found. */
 470   rev1 = 1;
 471   rev2 = 3;
 472
 473   facs_addr = 0;
 474   playground = playground_ptr = 0;
 475   playground_size = 0;
 476
 477   rsdp = (struct grub_acpi_rsdp_v10 *) grub_machine_acpi_get_rsdpv2 ();
 478
 479   if (! rsdp)
 480     rsdp = grub_machine_acpi_get_rsdpv1 ();
 481
 482   if (rsdp)
 483     {
 484       grub_uint32_t *entry_ptr;
 485       char *exclude = 0;
 486       char *load_only = 0;
 487       char *ptr;
 488       /* RSDT consists of header and an array of 32-bit pointers. */
 489       struct grub_acpi_table_header *rsdt;
 490
 491       exclude = state[0].set ? grub_strdup (state[0].arg) : 0;
 492       if (exclude)
 493         {
 494           for (ptr = exclude; *ptr; ptr++)
 495             *ptr = grub_tolower (*ptr);
 496         }
 497
 498       load_only = state[1].set ? grub_strdup (state[1].arg) : 0;
 499       if (load_only)
 500         {
 501           for (ptr = load_only; *ptr; ptr++)
 502             *ptr = grub_tolower (*ptr);
 503         }
 504
 505       /* Set revision variables to replicate the same version as host. */
 506       rev1 = ! rsdp->revision;
 507       rev2 = rsdp->revision;
 508       rsdt = (struct grub_acpi_table_header *) UINT_TO_PTR (rsdp->rsdt_addr);
 509       /* Load host tables. */
 510       for (entry_ptr = (grub_uint32_t *) (rsdt + 1);
 511            entry_ptr < (grub_uint32_t *) (((grub_uint8_t *) rsdt)
 512                                           + rsdt->length);
 513            entry_ptr++)
 514         {
 515           char signature[5];
 516           struct efiemu_acpi_table *table;
 517           struct grub_acpi_table_header *curtable
 518             = (struct grub_acpi_table_header *) UINT_TO_PTR (*entry_ptr);
 519           signature[4] = 0;
 520           for (i = 0; i < 4;i++)
 521             signature[i] = grub_tolower (curtable->signature[i]);
 522
 523           /* If it's FADT it contains addresses of DSDT and FACS. */
 524           if (grub_strcmp (signature, "facp") == 0)
 525             {
 526               struct grub_acpi_table_header *dsdt;
 527               struct grub_acpi_fadt *fadt = (struct grub_acpi_fadt *) curtable;
 528
 529               /* Set root header variables to the same values
 530                  as FACP by default. */
 531               grub_memcpy (&root_oemid, &(fadt->hdr.oemid),
 532                            sizeof (root_oemid));
 533               grub_memcpy (&root_oemtable, &(fadt->hdr.oemtable),
 534                            sizeof (root_oemtable));
 535               root_oemrev = fadt->hdr.oemrev;
 536               grub_memcpy (&root_creator_id, &(fadt->hdr.creator_id),
 537                            sizeof (root_creator_id));
 538               root_creator_rev = fadt->hdr.creator_rev;
 539
 540               /* Load DSDT if not excluded. */
 541               dsdt = (struct grub_acpi_table_header *)
 542                 UINT_TO_PTR (fadt->dsdt_addr);
 543               if (dsdt && (! exclude || ! grub_strword (exclude, "dsdt"))
 544                   && (! load_only || grub_strword (load_only, "dsdt"))
 545                   && dsdt->length >= sizeof (*dsdt))
 546                 {
 547                   dsdt_size = dsdt->length;
 548                   table_dsdt = grub_malloc (dsdt->length);
 549                   if (! table_dsdt)
 550                     {
 551                       free_tables ();
 552                       grub_free (exclude);
 553                       grub_free (load_only);
 554                       return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 555                                          "Could allocate table");
 556                     }
 557                   grub_memcpy (table_dsdt, dsdt, dsdt->length);
 558                 }
 559
 560               /* Save FACS address. FACS shouldn't be overridden. */
 561               facs_addr = fadt->facs_addr;
 562             }
 563
 564           /* Skip excluded tables. */
 565           if (exclude && grub_strword (exclude, signature))
 566             continue;
 567           if (load_only && ! grub_strword (load_only, signature))
 568             continue;
 569
 570           /* Sanity check. */
 571           if (curtable->length < sizeof (*curtable))
 572             continue;
 573
 574           table = (struct efiemu_acpi_table *) grub_malloc
 575             (sizeof (struct efiemu_acpi_table));
 576           if (! table)
 577             {
 578               free_tables ();
 579               grub_free (exclude);
 580               grub_free (load_only);
 581               return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 582                                  "Could allocate table structure");
 583             }
 584           table->size = curtable->length;
 585           table->addr = grub_malloc (table->size);
 586           playground_size += table->size;
 587           if (! table->addr)
 588             {
 589               free_tables ();
 590               return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 591                                  "Could allocate table");
 592             }
 593           table->next = acpi_tables;
 594           acpi_tables = table;
 595           grub_memcpy (table->addr, curtable, table->size);
 596         }
 597       grub_free (exclude);
 598       grub_free (load_only);
 599     }
 600
 601   /* Does user specify versions to generate? */
 602   if (state[2].set || state[3].set)
 603     {
 604       rev1 = state[2].set;
 605       if (state[3].set)
 606         rev2 = rev2 ? : 2;
 607       else
 608         rev2 = 0;
 609     }
 610
 611   /* Does user override root header information? */
 612   if (state[4].set)
 613     grub_strncpy (root_oemid, state[4].arg, sizeof (root_oemid));
 614   if (state[5].set)
 615     grub_strncpy (root_oemtable, state[5].arg, sizeof (root_oemtable));
 616   if (state[6].set)
 617     root_oemrev = grub_strtoul (state[6].arg, 0, 0);
 618   if (state[7].set)
 619     grub_strncpy (root_creator_id, state[7].arg, sizeof (root_creator_id));
 620   if (state[8].set)
 621     root_creator_rev = grub_strtoul (state[8].arg, 0, 0);
 622
 623   /* Load user tables */
 624   for (i = 0; i < argc; i++)
 625     {
 626       grub_file_t file;
 627       grub_size_t size;
 628       char *buf;
 629
 630       file = grub_gzfile_open (args[i], 1);
 631       if (! file)
 632         {
 633           free_tables ();
 634           return grub_error (GRUB_ERR_BAD_OS, "couldn't open file %s", args[i]);
 635         }
 636
 637       size = grub_file_size (file);
 638       if (size < sizeof (struct grub_acpi_table_header))
 639         {
 640           grub_file_close (file);
 641           free_tables ();
 642           return grub_error (GRUB_ERR_BAD_OS, "file %s is too small", args[i]);
 643         }
 644
 645       buf = (char *) grub_malloc (size);
 646       if (! buf)
 647         {
 648           grub_file_close (file);
 649           free_tables ();
 650           return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 651                              "couldn't read file %s", args[i]);
 652         }
 653
 654       if (grub_file_read (file, buf, size) != (int) size)
 655         {
 656           grub_file_close (file);
 657           free_tables ();
 658           return grub_error (GRUB_ERR_BAD_OS, "couldn't read file %s", args[i]);
 659         }
 660       grub_file_close (file);
 661
 662       if (grub_memcmp (((struct grub_acpi_table_header *) buf)->signature,
 663                        "DSDT", 4) == 0)
 664         {
 665           grub_free (table_dsdt);
 666           table_dsdt = buf;
 667           dsdt_size = size;
 668         }
 669       else
 670         {
 671           struct efiemu_acpi_table *table;
 672           table = (struct efiemu_acpi_table *) grub_malloc
 673             (sizeof (struct efiemu_acpi_table));
 674           if (! table)
 675             {
 676               free_tables ();
 677               return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 678                                  "Could allocate table structure");
 679             }
 680
 681           table->size = size;
 682           table->addr = buf;
 683           playground_size += table->size;
 684         }
 685     }
 686
 687   numoftables = 0;
 688   for (cur = acpi_tables; cur; cur = cur->next)
 689     numoftables++;
 690
 691   /* DSDT. */
 692   playground_size += dsdt_size;
 693   /* RSDT. */
 694   playground_size += sizeof (struct grub_acpi_table_header) + 4 * numoftables;
 695   /* RSDPv1. */
 696   playground_size += sizeof (struct grub_acpi_rsdp_v10);
 697   /* XSDT. */
 698   playground_size += sizeof (struct grub_acpi_table_header) + 8 * numoftables;
 699   /* RSDPv2. */
 700   playground_size += sizeof (struct grub_acpi_rsdp_v20);
 701
 702   playground = playground_ptr
 703     = grub_mmap_malign_and_register (1, playground_size, &mmapregion,
 704                                      GRUB_MACHINE_MEMORY_ACPI, 0);
 705
 706   if (! playground)
 707     {
 708       free_tables ();
 709       return grub_error (GRUB_ERR_OUT_OF_MEMORY,
 710                          "Couldn't allocate space for ACPI tables");
 711     }
 712
 713   setup_common_tables ();
 714
 715   /* Request space for RSDPv1. */
 716   if (rev1)
 717     setv1table ();
 718
 719   /* Request space for RSDPv2+ and XSDT. */
 720   if (rev2)
 721     setv2table ();
 722
 723   for (cur = acpi_tables; cur;)
 724     {
 725       t = cur;
 726       cur = cur->next;
 727       grub_free (t);
 728     }
 729   acpi_tables = 0;
 730
 731   if (! state[9].set && (err = grub_acpi_create_ebda ()))
 732     {
 733       rsdpv1_new = 0;
 734       rsdpv2_new = 0;
 735       grub_mmap_free_and_unregister (mmapregion);
 736       return err;
 737     }
 738
 739 #ifdef GRUB_MACHINE_EFI
 740   {
 741     struct grub_efi_guid acpi = GRUB_EFI_ACPI_TABLE_GUID;
 742     struct grub_efi_guid acpi20 = GRUB_EFI_ACPI_20_TABLE_GUID;
 743
 744     grub_efi_system_table->boot_services->install_configuration_table
 745       (&acpi20, grub_acpi_get_rsdpv2 ());
 746     grub_efi_system_table->boot_services->install_configuration_table
 747       (&acpi, grub_acpi_get_rsdpv1 ());
 748   }
 749 #endif
 750
 751   return GRUB_ERR_NONE;
 752 }
 753
 754 static grub_extcmd_t cmd;
 755
 756 GRUB_MOD_INIT(acpi)
 757 {
 758   cmd = grub_register_extcmd ("acpi", grub_cmd_acpi,
 759                               GRUB_COMMAND_FLAG_BOTH,
 760                               "acpi [-1|-2] [--exclude=table1,table2|"
 761                               "--load-only=table1,table2] filename1 "
 762                               " [filename2] [...]",
 763                               "Load host acpi tables and tables "
 764                               "specified by arguments",
 765                               options);
 766 }
 767
 768 GRUB_MOD_FINI(acpi)
 769 {
 770   grub_unregister_extcmd (cmd);
 771 }