1 /****************************************************************************** 2 * 3 * Module Name: tbutils - table utilities 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2013, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #define __TBUTILS_C__ 45 46 #include <contrib/dev/acpica/include/acpi.h> 47 #include <contrib/dev/acpica/include/accommon.h> 48 #include <contrib/dev/acpica/include/actables.h> 49 50 #define _COMPONENT ACPI_TABLES 51 ACPI_MODULE_NAME ("tbutils") 52 53 54 /* Local prototypes */ 55 56 static void 57 AcpiTbFixString ( 58 char *String, 59 ACPI_SIZE Length); 60 61 static void 62 AcpiTbCleanupTableHeader ( 63 ACPI_TABLE_HEADER *OutHeader, 64 ACPI_TABLE_HEADER *Header); 65 66 static ACPI_PHYSICAL_ADDRESS 67 AcpiTbGetRootTableEntry ( 68 UINT8 *TableEntry, 69 UINT32 TableEntrySize); 70 71 72 #if (!ACPI_REDUCED_HARDWARE) 73 /******************************************************************************* 74 * 75 * FUNCTION: AcpiTbInitializeFacs 76 * 77 * PARAMETERS: None 78 * 79 * RETURN: Status 80 * 81 * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global 82 * for accessing the Global Lock and Firmware Waking Vector 83 * 84 ******************************************************************************/ 85 86 ACPI_STATUS 87 AcpiTbInitializeFacs ( 88 void) 89 { 90 ACPI_STATUS Status; 91 92 93 /* If Hardware Reduced flag is set, there is no FACS */ 94 95 if (AcpiGbl_ReducedHardware) 96 { 97 AcpiGbl_FACS = NULL; 98 return (AE_OK); 99 } 100 101 Status = AcpiGetTableByIndex (ACPI_TABLE_INDEX_FACS, 102 ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &AcpiGbl_FACS)); 103 return (Status); 104 } 105 #endif /* !ACPI_REDUCED_HARDWARE */ 106 107 108 /******************************************************************************* 109 * 110 * FUNCTION: AcpiTbTablesLoaded 111 * 112 * PARAMETERS: None 113 * 114 * RETURN: TRUE if required ACPI tables are loaded 115 * 116 * DESCRIPTION: Determine if the minimum required ACPI tables are present 117 * (FADT, FACS, DSDT) 118 * 119 ******************************************************************************/ 120 121 BOOLEAN 122 AcpiTbTablesLoaded ( 123 void) 124 { 125 126 if (AcpiGbl_RootTableList.CurrentTableCount >= 3) 127 { 128 return (TRUE); 129 } 130 131 return (FALSE); 132 } 133 134 135 /******************************************************************************* 136 * 137 * FUNCTION: AcpiTbFixString 138 * 139 * PARAMETERS: String - String to be repaired 140 * Length - Maximum length 141 * 142 * RETURN: None 143 * 144 * DESCRIPTION: Replace every non-printable or non-ascii byte in the string 145 * with a question mark '?'. 146 * 147 ******************************************************************************/ 148 149 static void 150 AcpiTbFixString ( 151 char *String, 152 ACPI_SIZE Length) 153 { 154 155 while (Length && *String) 156 { 157 if (!ACPI_IS_PRINT (*String)) 158 { 159 *String = '?'; 160 } 161 String++; 162 Length--; 163 } 164 } 165 166 167 /******************************************************************************* 168 * 169 * FUNCTION: AcpiTbCleanupTableHeader 170 * 171 * PARAMETERS: OutHeader - Where the cleaned header is returned 172 * Header - Input ACPI table header 173 * 174 * RETURN: Returns the cleaned header in OutHeader 175 * 176 * DESCRIPTION: Copy the table header and ensure that all "string" fields in 177 * the header consist of printable characters. 178 * 179 ******************************************************************************/ 180 181 static void 182 AcpiTbCleanupTableHeader ( 183 ACPI_TABLE_HEADER *OutHeader, 184 ACPI_TABLE_HEADER *Header) 185 { 186 187 ACPI_MEMCPY (OutHeader, Header, sizeof (ACPI_TABLE_HEADER)); 188 189 AcpiTbFixString (OutHeader->Signature, ACPI_NAME_SIZE); 190 AcpiTbFixString (OutHeader->OemId, ACPI_OEM_ID_SIZE); 191 AcpiTbFixString (OutHeader->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 192 AcpiTbFixString (OutHeader->AslCompilerId, ACPI_NAME_SIZE); 193 } 194 195 196 /******************************************************************************* 197 * 198 * FUNCTION: AcpiTbPrintTableHeader 199 * 200 * PARAMETERS: Address - Table physical address 201 * Header - Table header 202 * 203 * RETURN: None 204 * 205 * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. 206 * 207 ******************************************************************************/ 208 209 void 210 AcpiTbPrintTableHeader ( 211 ACPI_PHYSICAL_ADDRESS Address, 212 ACPI_TABLE_HEADER *Header) 213 { 214 ACPI_TABLE_HEADER LocalHeader; 215 216 217 /* 218 * The reason that the Address is cast to a void pointer is so that we 219 * can use %p which will work properly on both 32-bit and 64-bit hosts. 220 */ 221 if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_FACS)) 222 { 223 /* FACS only has signature and length fields */ 224 225 ACPI_INFO ((AE_INFO, "%4.4s %p %05X", 226 Header->Signature, ACPI_CAST_PTR (void, Address), 227 Header->Length)); 228 } 229 else if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_RSDP)) 230 { 231 /* RSDP has no common fields */ 232 233 ACPI_MEMCPY (LocalHeader.OemId, 234 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->OemId, ACPI_OEM_ID_SIZE); 235 AcpiTbFixString (LocalHeader.OemId, ACPI_OEM_ID_SIZE); 236 237 ACPI_INFO ((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", 238 ACPI_CAST_PTR (void, Address), 239 (ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ? 240 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20, 241 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision, 242 LocalHeader.OemId)); 243 } 244 else 245 { 246 /* Standard ACPI table with full common header */ 247 248 AcpiTbCleanupTableHeader (&LocalHeader, Header); 249 250 ACPI_INFO ((AE_INFO, 251 "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", 252 LocalHeader.Signature, ACPI_CAST_PTR (void, Address), 253 LocalHeader.Length, LocalHeader.Revision, LocalHeader.OemId, 254 LocalHeader.OemTableId, LocalHeader.OemRevision, 255 LocalHeader.AslCompilerId, LocalHeader.AslCompilerRevision)); 256 } 257 } 258 259 260 /******************************************************************************* 261 * 262 * FUNCTION: AcpiTbValidateChecksum 263 * 264 * PARAMETERS: Table - ACPI table to verify 265 * Length - Length of entire table 266 * 267 * RETURN: Status 268 * 269 * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns 270 * exception on bad checksum. 271 * 272 ******************************************************************************/ 273 274 ACPI_STATUS 275 AcpiTbVerifyChecksum ( 276 ACPI_TABLE_HEADER *Table, 277 UINT32 Length) 278 { 279 UINT8 Checksum; 280 281 282 /* Compute the checksum on the table */ 283 284 Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length); 285 286 /* Checksum ok? (should be zero) */ 287 288 if (Checksum) 289 { 290 ACPI_BIOS_WARNING ((AE_INFO, 291 "Incorrect checksum in table [%4.4s] - 0x%2.2X, " 292 "should be 0x%2.2X", 293 Table->Signature, Table->Checksum, 294 (UINT8) (Table->Checksum - Checksum))); 295 296 #if (ACPI_CHECKSUM_ABORT) 297 return (AE_BAD_CHECKSUM); 298 #endif 299 } 300 301 return (AE_OK); 302 } 303 304 305 /******************************************************************************* 306 * 307 * FUNCTION: AcpiTbChecksum 308 * 309 * PARAMETERS: Buffer - Pointer to memory region to be checked 310 * Length - Length of this memory region 311 * 312 * RETURN: Checksum (UINT8) 313 * 314 * DESCRIPTION: Calculates circular checksum of memory region. 315 * 316 ******************************************************************************/ 317 318 UINT8 319 AcpiTbChecksum ( 320 UINT8 *Buffer, 321 UINT32 Length) 322 { 323 UINT8 Sum = 0; 324 UINT8 *End = Buffer + Length; 325 326 327 while (Buffer < End) 328 { 329 Sum = (UINT8) (Sum + *(Buffer++)); 330 } 331 332 return (Sum); 333 } 334 335 336 /******************************************************************************* 337 * 338 * FUNCTION: AcpiTbCheckDsdtHeader 339 * 340 * PARAMETERS: None 341 * 342 * RETURN: None 343 * 344 * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect 345 * if the DSDT has been replaced from outside the OS and/or if 346 * the DSDT header has been corrupted. 347 * 348 ******************************************************************************/ 349 350 void 351 AcpiTbCheckDsdtHeader ( 352 void) 353 { 354 355 /* Compare original length and checksum to current values */ 356 357 if (AcpiGbl_OriginalDsdtHeader.Length != AcpiGbl_DSDT->Length || 358 AcpiGbl_OriginalDsdtHeader.Checksum != AcpiGbl_DSDT->Checksum) 359 { 360 ACPI_BIOS_ERROR ((AE_INFO, 361 "The DSDT has been corrupted or replaced - " 362 "old, new headers below")); 363 AcpiTbPrintTableHeader (0, &AcpiGbl_OriginalDsdtHeader); 364 AcpiTbPrintTableHeader (0, AcpiGbl_DSDT); 365 366 /* Disable further error messages */ 367 368 AcpiGbl_OriginalDsdtHeader.Length = AcpiGbl_DSDT->Length; 369 AcpiGbl_OriginalDsdtHeader.Checksum = AcpiGbl_DSDT->Checksum; 370 } 371 } 372 373 374 /******************************************************************************* 375 * 376 * FUNCTION: AcpiTbCopyDsdt 377 * 378 * PARAMETERS: TableDesc - Installed table to copy 379 * 380 * RETURN: None 381 * 382 * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory. 383 * Some very bad BIOSs are known to either corrupt the DSDT or 384 * install a new, bad DSDT. This copy works around the problem. 385 * 386 ******************************************************************************/ 387 388 ACPI_TABLE_HEADER * 389 AcpiTbCopyDsdt ( 390 UINT32 TableIndex) 391 { 392 ACPI_TABLE_HEADER *NewTable; 393 ACPI_TABLE_DESC *TableDesc; 394 395 396 TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex]; 397 398 NewTable = ACPI_ALLOCATE (TableDesc->Length); 399 if (!NewTable) 400 { 401 ACPI_ERROR ((AE_INFO, "Could not copy DSDT of length 0x%X", 402 TableDesc->Length)); 403 return (NULL); 404 } 405 406 ACPI_MEMCPY (NewTable, TableDesc->Pointer, TableDesc->Length); 407 AcpiTbDeleteTable (TableDesc); 408 TableDesc->Pointer = NewTable; 409 TableDesc->Flags = ACPI_TABLE_ORIGIN_ALLOCATED; 410 411 ACPI_INFO ((AE_INFO, 412 "Forced DSDT copy: length 0x%05X copied locally, original unmapped", 413 NewTable->Length)); 414 415 return (NewTable); 416 } 417 418 419 /******************************************************************************* 420 * 421 * FUNCTION: AcpiTbInstallTable 422 * 423 * PARAMETERS: Address - Physical address of DSDT or FACS 424 * Signature - Table signature, NULL if no need to 425 * match 426 * TableIndex - Index into root table array 427 * 428 * RETURN: None 429 * 430 * DESCRIPTION: Install an ACPI table into the global data structure. The 431 * table override mechanism is called to allow the host 432 * OS to replace any table before it is installed in the root 433 * table array. 434 * 435 ******************************************************************************/ 436 437 void 438 AcpiTbInstallTable ( 439 ACPI_PHYSICAL_ADDRESS Address, 440 char *Signature, 441 UINT32 TableIndex) 442 { 443 ACPI_TABLE_HEADER *Table; 444 ACPI_TABLE_HEADER *FinalTable; 445 ACPI_TABLE_DESC *TableDesc; 446 447 448 if (!Address) 449 { 450 ACPI_ERROR ((AE_INFO, "Null physical address for ACPI table [%s]", 451 Signature)); 452 return; 453 } 454 455 /* Map just the table header */ 456 457 Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); 458 if (!Table) 459 { 460 ACPI_ERROR ((AE_INFO, "Could not map memory for table [%s] at %p", 461 Signature, ACPI_CAST_PTR (void, Address))); 462 return; 463 } 464 465 /* If a particular signature is expected (DSDT/FACS), it must match */ 466 467 if (Signature && 468 !ACPI_COMPARE_NAME (Table->Signature, Signature)) 469 { 470 ACPI_BIOS_ERROR ((AE_INFO, 471 "Invalid signature 0x%X for ACPI table, expected [%s]", 472 *ACPI_CAST_PTR (UINT32, Table->Signature), Signature)); 473 goto UnmapAndExit; 474 } 475 476 /* 477 * Initialize the table entry. Set the pointer to NULL, since the 478 * table is not fully mapped at this time. 479 */ 480 TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex]; 481 482 TableDesc->Address = Address; 483 TableDesc->Pointer = NULL; 484 TableDesc->Length = Table->Length; 485 TableDesc->Flags = ACPI_TABLE_ORIGIN_MAPPED; 486 ACPI_MOVE_32_TO_32 (TableDesc->Signature.Ascii, Table->Signature); 487 488 /* When DSDT is overriden, assume SSDT is also overriden with it */ 489 490 if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT) && 491 (AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Flags & 492 ACPI_TABLE_ORIGIN_OVERRIDE)) 493 { 494 TableDesc->Flags = ACPI_TABLE_ORIGIN_OVERRIDE; 495 ACPI_INFO ((AE_INFO, 496 "%4.4s %p Logical table override, replaced with %4.4s", 497 ACPI_SIG_SSDT, ACPI_CAST_PTR (void, Address), ACPI_SIG_DSDT)); 498 goto UnmapAndExit; 499 } 500 501 /* 502 * ACPI Table Override: 503 * 504 * Before we install the table, let the host OS override it with a new 505 * one if desired. Any table within the RSDT/XSDT can be replaced, 506 * including the DSDT which is pointed to by the FADT. 507 * 508 * NOTE: If the table is overridden, then FinalTable will contain a 509 * mapped pointer to the full new table. If the table is not overridden, 510 * or if there has been a physical override, then the table will be 511 * fully mapped later (in verify table). In any case, we must 512 * unmap the header that was mapped above. 513 */ 514 FinalTable = AcpiTbTableOverride (Table, TableDesc); 515 if (!FinalTable) 516 { 517 FinalTable = Table; /* There was no override */ 518 } 519 520 AcpiTbPrintTableHeader (TableDesc->Address, FinalTable); 521 522 /* Set the global integer width (based upon revision of the DSDT) */ 523 524 if (TableIndex == ACPI_TABLE_INDEX_DSDT) 525 { 526 AcpiUtSetIntegerWidth (FinalTable->Revision); 527 } 528 529 /* 530 * If we have a physical override during this early loading of the ACPI 531 * tables, unmap the table for now. It will be mapped again later when 532 * it is actually used. This supports very early loading of ACPI tables, 533 * before virtual memory is fully initialized and running within the 534 * host OS. Note: A logical override has the ACPI_TABLE_ORIGIN_OVERRIDE 535 * flag set and will not be deleted below. 536 */ 537 if (FinalTable != Table) 538 { 539 AcpiTbDeleteTable (TableDesc); 540 } 541 542 543 UnmapAndExit: 544 545 /* Always unmap the table header that we mapped above */ 546 547 AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER)); 548 } 549 550 551 /******************************************************************************* 552 * 553 * FUNCTION: AcpiTbGetRootTableEntry 554 * 555 * PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry 556 * TableEntrySize - sizeof 32 or 64 (RSDT or XSDT) 557 * 558 * RETURN: Physical address extracted from the root table 559 * 560 * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on 561 * both 32-bit and 64-bit platforms 562 * 563 * NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on 564 * 64-bit platforms. 565 * 566 ******************************************************************************/ 567 568 static ACPI_PHYSICAL_ADDRESS 569 AcpiTbGetRootTableEntry ( 570 UINT8 *TableEntry, 571 UINT32 TableEntrySize) 572 { 573 UINT64 Address64; 574 575 576 /* 577 * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): 578 * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT 579 */ 580 if (TableEntrySize == sizeof (UINT32)) 581 { 582 /* 583 * 32-bit platform, RSDT: Return 32-bit table entry 584 * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return 585 */ 586 return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR (UINT32, TableEntry))); 587 } 588 else 589 { 590 /* 591 * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return 592 * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, 593 * return 64-bit 594 */ 595 ACPI_MOVE_64_TO_64 (&Address64, TableEntry); 596 597 #if ACPI_MACHINE_WIDTH == 32 598 if (Address64 > ACPI_UINT32_MAX) 599 { 600 /* Will truncate 64-bit address to 32 bits, issue warning */ 601 602 ACPI_BIOS_WARNING ((AE_INFO, 603 "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," 604 " truncating", 605 ACPI_FORMAT_UINT64 (Address64))); 606 } 607 #endif 608 return ((ACPI_PHYSICAL_ADDRESS) (Address64)); 609 } 610 } 611 612 613 /******************************************************************************* 614 * 615 * FUNCTION: AcpiTbParseRootTable 616 * 617 * PARAMETERS: Rsdp - Pointer to the RSDP 618 * 619 * RETURN: Status 620 * 621 * DESCRIPTION: This function is called to parse the Root System Description 622 * Table (RSDT or XSDT) 623 * 624 * NOTE: Tables are mapped (not copied) for efficiency. The FACS must 625 * be mapped and cannot be copied because it contains the actual 626 * memory location of the ACPI Global Lock. 627 * 628 ******************************************************************************/ 629 630 ACPI_STATUS 631 AcpiTbParseRootTable ( 632 ACPI_PHYSICAL_ADDRESS RsdpAddress) 633 { 634 ACPI_TABLE_RSDP *Rsdp; 635 UINT32 TableEntrySize; 636 UINT32 i; 637 UINT32 TableCount; 638 ACPI_TABLE_HEADER *Table; 639 ACPI_PHYSICAL_ADDRESS Address; 640 UINT32 Length; 641 UINT8 *TableEntry; 642 ACPI_STATUS Status; 643 644 645 ACPI_FUNCTION_TRACE (TbParseRootTable); 646 647 648 /* 649 * Map the entire RSDP and extract the address of the RSDT or XSDT 650 */ 651 Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP)); 652 if (!Rsdp) 653 { 654 return_ACPI_STATUS (AE_NO_MEMORY); 655 } 656 657 AcpiTbPrintTableHeader (RsdpAddress, 658 ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp)); 659 660 /* Differentiate between RSDT and XSDT root tables */ 661 662 if (Rsdp->Revision > 1 && Rsdp->XsdtPhysicalAddress) 663 { 664 /* 665 * Root table is an XSDT (64-bit physical addresses). We must use the 666 * XSDT if the revision is > 1 and the XSDT pointer is present, as per 667 * the ACPI specification. 668 */ 669 Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress; 670 TableEntrySize = sizeof (UINT64); 671 } 672 else 673 { 674 /* Root table is an RSDT (32-bit physical addresses) */ 675 676 Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress; 677 TableEntrySize = sizeof (UINT32); 678 } 679 680 /* 681 * It is not possible to map more than one entry in some environments, 682 * so unmap the RSDP here before mapping other tables 683 */ 684 AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP)); 685 686 687 /* Map the RSDT/XSDT table header to get the full table length */ 688 689 Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); 690 if (!Table) 691 { 692 return_ACPI_STATUS (AE_NO_MEMORY); 693 } 694 695 AcpiTbPrintTableHeader (Address, Table); 696 697 /* Get the length of the full table, verify length and map entire table */ 698 699 Length = Table->Length; 700 AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER)); 701 702 if (Length < sizeof (ACPI_TABLE_HEADER)) 703 { 704 ACPI_BIOS_ERROR ((AE_INFO, 705 "Invalid table length 0x%X in RSDT/XSDT", Length)); 706 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); 707 } 708 709 Table = AcpiOsMapMemory (Address, Length); 710 if (!Table) 711 { 712 return_ACPI_STATUS (AE_NO_MEMORY); 713 } 714 715 /* Validate the root table checksum */ 716 717 Status = AcpiTbVerifyChecksum (Table, Length); 718 if (ACPI_FAILURE (Status)) 719 { 720 AcpiOsUnmapMemory (Table, Length); 721 return_ACPI_STATUS (Status); 722 } 723 724 /* Calculate the number of tables described in the root table */ 725 726 TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) / 727 TableEntrySize); 728 729 /* 730 * First two entries in the table array are reserved for the DSDT 731 * and FACS, which are not actually present in the RSDT/XSDT - they 732 * come from the FADT 733 */ 734 TableEntry = ACPI_CAST_PTR (UINT8, Table) + sizeof (ACPI_TABLE_HEADER); 735 AcpiGbl_RootTableList.CurrentTableCount = 2; 736 737 /* 738 * Initialize the root table array from the RSDT/XSDT 739 */ 740 for (i = 0; i < TableCount; i++) 741 { 742 if (AcpiGbl_RootTableList.CurrentTableCount >= 743 AcpiGbl_RootTableList.MaxTableCount) 744 { 745 /* There is no more room in the root table array, attempt resize */ 746 747 Status = AcpiTbResizeRootTableList (); 748 if (ACPI_FAILURE (Status)) 749 { 750 ACPI_WARNING ((AE_INFO, "Truncating %u table entries!", 751 (unsigned) (TableCount - 752 (AcpiGbl_RootTableList.CurrentTableCount - 2)))); 753 break; 754 } 755 } 756 757 /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ 758 759 AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.CurrentTableCount].Address = 760 AcpiTbGetRootTableEntry (TableEntry, TableEntrySize); 761 762 TableEntry += TableEntrySize; 763 AcpiGbl_RootTableList.CurrentTableCount++; 764 } 765 766 /* 767 * It is not possible to map more than one entry in some environments, 768 * so unmap the root table here before mapping other tables 769 */ 770 AcpiOsUnmapMemory (Table, Length); 771 772 /* 773 * Complete the initialization of the root table array by examining 774 * the header of each table 775 */ 776 for (i = 2; i < AcpiGbl_RootTableList.CurrentTableCount; i++) 777 { 778 AcpiTbInstallTable (AcpiGbl_RootTableList.Tables[i].Address, 779 NULL, i); 780 781 /* Special case for FADT - get the DSDT and FACS */ 782 783 if (ACPI_COMPARE_NAME ( 784 &AcpiGbl_RootTableList.Tables[i].Signature, ACPI_SIG_FADT)) 785 { 786 AcpiTbParseFadt (i); 787 } 788 } 789 790 return_ACPI_STATUS (AE_OK); 791 } 792