1/****************************************************************************** 2 * 3 * Module Name: osbsdtbl - BSD OSL for obtaining ACPI tables 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116#include "acpidump.h" 117 118#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined (__DragonFly__) 119#include <kenv.h> 120#endif 121#include <unistd.h> 122#include <sys/param.h> 123#include <sys/sysctl.h> 124 125 126#define _COMPONENT ACPI_OS_SERVICES 127 ACPI_MODULE_NAME ("osbsdtbl") 128 129 130/* Local prototypes */ 131 132static ACPI_STATUS 133OslTableInitialize ( 134 void); 135 136static ACPI_STATUS 137OslMapTable ( 138 ACPI_SIZE Address, 139 char *Signature, 140 ACPI_TABLE_HEADER **Table); 141 142static ACPI_STATUS 143OslAddTablesToList ( 144 void); 145 146static ACPI_STATUS 147OslGetTableViaRoot ( 148 char *Signature, 149 UINT32 Instance, 150 ACPI_TABLE_HEADER **Table, 151 ACPI_PHYSICAL_ADDRESS *Address); 152 153 154/* Hints for RSDP */ 155#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) 156#define SYSTEM_KENV "hint.acpi.0.rsdp" 157#define SYSTEM_SYSCTL "machdep.acpi_root" 158#elif defined(__NetBSD__) 159#define SYSTEM_SYSCTL "hw.acpi.root" 160#endif 161 162/* Initialization flags */ 163 164UINT8 Gbl_TableListInitialized = FALSE; 165UINT8 Gbl_MainTableObtained = FALSE; 166 167/* Local copies of main ACPI tables */ 168 169ACPI_TABLE_RSDP Gbl_Rsdp; 170ACPI_TABLE_FADT *Gbl_Fadt; 171ACPI_TABLE_RSDT *Gbl_Rsdt; 172ACPI_TABLE_XSDT *Gbl_Xsdt; 173 174/* Fadt address */ 175 176ACPI_PHYSICAL_ADDRESS Gbl_FadtAddress; 177 178/* Revision of RSD PTR */ 179 180UINT8 Gbl_Revision; 181 182/* List of information about obtained ACPI tables */ 183 184typedef struct table_info 185{ 186 struct table_info *Next; 187 char Signature[4]; 188 UINT32 Instance; 189 ACPI_PHYSICAL_ADDRESS Address; 190 191} OSL_TABLE_INFO; 192 193OSL_TABLE_INFO *Gbl_TableListHead = NULL; 194 195 196/****************************************************************************** 197 * 198 * FUNCTION: AcpiOsGetTableByAddress 199 * 200 * PARAMETERS: Address - Physical address of the ACPI table 201 * Table - Where a pointer to the table is returned 202 * 203 * RETURN: Status; Table buffer is returned if AE_OK. 204 * AE_NOT_FOUND: A valid table was not found at the address 205 * 206 * DESCRIPTION: Get an ACPI table via a physical memory address. 207 * 208 *****************************************************************************/ 209 210ACPI_STATUS 211AcpiOsGetTableByAddress ( 212 ACPI_PHYSICAL_ADDRESS Address, 213 ACPI_TABLE_HEADER **Table) 214{ 215 ACPI_TABLE_HEADER *MappedTable; 216 ACPI_TABLE_HEADER *LocalTable; 217 ACPI_STATUS Status; 218 219 220 /* Validate the input physical address to avoid program crash */ 221 222 if (Address < ACPI_HI_RSDP_WINDOW_BASE) 223 { 224 fprintf (stderr, "Invalid table address: 0x%8.8X%8.8X\n", 225 ACPI_FORMAT_UINT64 (Address)); 226 return (AE_BAD_ADDRESS); 227 } 228 229 /* Map the table and validate it */ 230 231 Status = OslMapTable (Address, NULL, &MappedTable); 232 if (ACPI_FAILURE (Status)) 233 { 234 return (Status); 235 } 236 237 /* Copy table to local buffer and return it */ 238 239 LocalTable = calloc (1, MappedTable->Length); 240 if (!LocalTable) 241 { 242 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 243 return (AE_NO_MEMORY); 244 } 245 246 memcpy (LocalTable, MappedTable, MappedTable->Length); 247 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 248 249 *Table = LocalTable; 250 return (AE_OK); 251} 252 253 254/****************************************************************************** 255 * 256 * FUNCTION: AcpiOsGetTableByName 257 * 258 * PARAMETERS: Signature - ACPI Signature for desired table. Must be 259 * a null terminated 4-character string. 260 * Instance - Multiple table support for SSDT/UEFI (0...n) 261 * Must be 0 for other tables. 262 * Table - Where a pointer to the table is returned 263 * Address - Where the table physical address is returned 264 * 265 * RETURN: Status; Table buffer and physical address returned if AE_OK. 266 * AE_LIMIT: Instance is beyond valid limit 267 * AE_NOT_FOUND: A table with the signature was not found 268 * 269 * NOTE: Assumes the input signature is uppercase. 270 * 271 *****************************************************************************/ 272 273ACPI_STATUS 274AcpiOsGetTableByName ( 275 char *Signature, 276 UINT32 Instance, 277 ACPI_TABLE_HEADER **Table, 278 ACPI_PHYSICAL_ADDRESS *Address) 279{ 280 ACPI_STATUS Status; 281 282 283 /* Instance is only valid for SSDT/UEFI tables */ 284 285 if (Instance && 286 !ACPI_COMPARE_NAME (Signature, ACPI_SIG_SSDT) && 287 !ACPI_COMPARE_NAME (Signature, ACPI_SIG_UEFI)) 288 { 289 return (AE_LIMIT); 290 } 291 292 /* Initialize main tables */ 293 294 Status = OslTableInitialize (); 295 if (ACPI_FAILURE (Status)) 296 { 297 return (Status); 298 } 299 300 /* 301 * If one of the main ACPI tables was requested (RSDT/XSDT/FADT), 302 * simply return it immediately. 303 */ 304 if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_XSDT)) 305 { 306 if (!Gbl_Revision) 307 { 308 return (AE_NOT_FOUND); 309 } 310 311 *Address = Gbl_Rsdp.XsdtPhysicalAddress; 312 *Table = (ACPI_TABLE_HEADER *) Gbl_Xsdt; 313 return (AE_OK); 314 } 315 316 if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_RSDT)) 317 { 318 if (!Gbl_Rsdp.RsdtPhysicalAddress) 319 { 320 return (AE_NOT_FOUND); 321 } 322 323 *Address = Gbl_Rsdp.RsdtPhysicalAddress; 324 *Table = (ACPI_TABLE_HEADER *) Gbl_Rsdt; 325 return (AE_OK); 326 } 327 328 if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_FADT)) 329 { 330 *Address = Gbl_FadtAddress; 331 *Table = (ACPI_TABLE_HEADER *) Gbl_Fadt; 332 return (AE_OK); 333 } 334 335 /* Not a main ACPI table, attempt to extract it from the RSDT/XSDT */ 336 337 Status = OslGetTableViaRoot (Signature, Instance, Table, Address); 338 if (ACPI_FAILURE (Status)) 339 { 340 return (Status); 341 } 342 343 return (AE_OK); 344} 345 346 347/****************************************************************************** 348 * 349 * FUNCTION: AcpiOsGetTableByIndex 350 * 351 * PARAMETERS: Index - Which table to get 352 * Table - Where a pointer to the table is returned 353 * Instance - Where a pointer to the table instance no. is 354 * returned 355 * Address - Where the table physical address is returned 356 * 357 * RETURN: Status; Table buffer and physical address returned if AE_OK. 358 * AE_LIMIT: Index is beyond valid limit 359 * 360 * DESCRIPTION: Get an ACPI table via an index value (0 through n). Returns 361 * AE_LIMIT when an invalid index is reached. Index is not 362 * necessarily an index into the RSDT/XSDT. 363 * 364 *****************************************************************************/ 365 366ACPI_STATUS 367AcpiOsGetTableByIndex ( 368 UINT32 Index, 369 ACPI_TABLE_HEADER **Table, 370 UINT32 *Instance, 371 ACPI_PHYSICAL_ADDRESS *Address) 372{ 373 OSL_TABLE_INFO *Info; 374 ACPI_STATUS Status; 375 UINT32 i; 376 377 378 /* Initialize main tables */ 379 380 Status = OslTableInitialize (); 381 if (ACPI_FAILURE (Status)) 382 { 383 return (Status); 384 } 385 386 /* Add all tables to list */ 387 388 Status = OslAddTablesToList (); 389 if (ACPI_FAILURE (Status)) 390 { 391 return (Status); 392 } 393 394 /* Validate Index */ 395 396 if (Index >= Gbl_TableListHead->Instance) 397 { 398 return (AE_LIMIT); 399 } 400 401 /* Point to the table list entry specified by the Index argument */ 402 403 Info = Gbl_TableListHead; 404 for (i = 0; i <= Index; i++) 405 { 406 Info = Info->Next; 407 } 408 409 /* Now we can just get the table via the address or name */ 410 411 if (Info->Address) 412 { 413 Status = AcpiOsGetTableByAddress (Info->Address, Table); 414 if (ACPI_SUCCESS (Status)) 415 { 416 *Address = Info->Address; 417 } 418 } 419 else 420 { 421 Status = AcpiOsGetTableByName (Info->Signature, Info->Instance, 422 Table, Address); 423 } 424 425 if (ACPI_SUCCESS (Status)) 426 { 427 *Instance = Info->Instance; 428 } 429 return (Status); 430} 431 432 433/****************************************************************************** 434 * 435 * FUNCTION: OslTableInitialize 436 * 437 * PARAMETERS: None 438 * 439 * RETURN: Status 440 * 441 * DESCRIPTION: Initialize ACPI table data. Get and store main ACPI tables to 442 * local variables. Main ACPI tables include RSDP, FADT, RSDT, 443 * and/or XSDT. 444 * 445 *****************************************************************************/ 446 447static ACPI_STATUS 448OslTableInitialize ( 449 void) 450{ 451#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) 452 char Buffer[32]; 453#endif 454 ACPI_TABLE_HEADER *MappedTable; 455 UINT8 *TableAddress; 456 UINT8 *RsdpAddress; 457 ACPI_PHYSICAL_ADDRESS RsdpBase; 458 ACPI_SIZE RsdpSize; 459 ACPI_STATUS Status; 460 u_long Address = 0; 461#if defined(SYSTEM_SYSCTL) 462 size_t Length = sizeof (Address); 463#endif 464 465 466 /* Get main ACPI tables from memory on first invocation of this function */ 467 468 if (Gbl_MainTableObtained) 469 { 470 return (AE_OK); 471 } 472 473 /* Attempt to use kenv or sysctl to find RSD PTR record. */ 474 475 if (Gbl_RsdpBase) 476 { 477 Address = Gbl_RsdpBase; 478 } 479#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined (__DragonFly__) 480 else if (kenv (KENV_GET, SYSTEM_KENV, Buffer, sizeof (Buffer)) > 0) 481 { 482 Address = strtoul (Buffer, NULL, 0); 483 } 484#endif 485#if defined(SYSTEM_SYSCTL) 486 if (!Address) 487 { 488 if (sysctlbyname (SYSTEM_SYSCTL, &Address, &Length, NULL, 0) != 0) 489 { 490 Address = 0; 491 } 492 } 493#endif 494 if (Address) 495 { 496 RsdpBase = Address; 497 RsdpSize = sizeof (Gbl_Rsdp); 498 } 499 else 500 { 501 RsdpBase = ACPI_HI_RSDP_WINDOW_BASE; 502 RsdpSize = ACPI_HI_RSDP_WINDOW_SIZE; 503 } 504 505 /* Get RSDP from memory */ 506 507 RsdpAddress = AcpiOsMapMemory (RsdpBase, RsdpSize); 508 if (!RsdpAddress) 509 { 510 return (AE_BAD_ADDRESS); 511 } 512 513 /* Search low memory for the RSDP */ 514 515 TableAddress = AcpiTbScanMemoryForRsdp (RsdpAddress, RsdpSize); 516 if (!TableAddress) 517 { 518 AcpiOsUnmapMemory (RsdpAddress, RsdpSize); 519 return (AE_ERROR); 520 } 521 522 memcpy (&Gbl_Rsdp, TableAddress, sizeof (Gbl_Rsdp)); 523 AcpiOsUnmapMemory (RsdpAddress, RsdpSize); 524 525 /* Get XSDT from memory */ 526 527 if (Gbl_Rsdp.Revision) 528 { 529 Status = OslMapTable (Gbl_Rsdp.XsdtPhysicalAddress, 530 ACPI_SIG_XSDT, &MappedTable); 531 if (ACPI_FAILURE (Status)) 532 { 533 return (Status); 534 } 535 536 Gbl_Revision = 2; 537 Gbl_Xsdt = calloc (1, MappedTable->Length); 538 if (!Gbl_Xsdt) 539 { 540 fprintf (stderr, 541 "XSDT: Could not allocate buffer for table of length %X\n", 542 MappedTable->Length); 543 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 544 return (AE_NO_MEMORY); 545 } 546 547 memcpy (Gbl_Xsdt, MappedTable, MappedTable->Length); 548 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 549 } 550 551 /* Get RSDT from memory */ 552 553 if (Gbl_Rsdp.RsdtPhysicalAddress) 554 { 555 Status = OslMapTable (Gbl_Rsdp.RsdtPhysicalAddress, 556 ACPI_SIG_RSDT, &MappedTable); 557 if (ACPI_FAILURE (Status)) 558 { 559 return (Status); 560 } 561 562 Gbl_Rsdt = calloc (1, MappedTable->Length); 563 if (!Gbl_Rsdt) 564 { 565 fprintf (stderr, 566 "RSDT: Could not allocate buffer for table of length %X\n", 567 MappedTable->Length); 568 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 569 return (AE_NO_MEMORY); 570 } 571 572 memcpy (Gbl_Rsdt, MappedTable, MappedTable->Length); 573 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 574 } 575 576 /* Get FADT from memory */ 577 578 if (Gbl_Revision) 579 { 580 Gbl_FadtAddress = Gbl_Xsdt->TableOffsetEntry[0]; 581 } 582 else 583 { 584 Gbl_FadtAddress = Gbl_Rsdt->TableOffsetEntry[0]; 585 } 586 587 if (!Gbl_FadtAddress) 588 { 589 fprintf(stderr, "FADT: Table could not be found\n"); 590 return (AE_ERROR); 591 } 592 593 Status = OslMapTable (Gbl_FadtAddress, ACPI_SIG_FADT, &MappedTable); 594 if (ACPI_FAILURE (Status)) 595 { 596 return (Status); 597 } 598 599 Gbl_Fadt = calloc (1, MappedTable->Length); 600 if (!Gbl_Fadt) 601 { 602 fprintf (stderr, 603 "FADT: Could not allocate buffer for table of length %X\n", 604 MappedTable->Length); 605 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 606 return (AE_NO_MEMORY); 607 } 608 609 memcpy (Gbl_Fadt, MappedTable, MappedTable->Length); 610 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 611 Gbl_MainTableObtained = TRUE; 612 return (AE_OK); 613} 614 615 616/****************************************************************************** 617 * 618 * FUNCTION: OslGetTableViaRoot 619 * 620 * PARAMETERS: Signature - ACPI Signature for common table. Must be 621 * a null terminated 4-character string. 622 * Instance - Multiple table support for SSDT/UEFI (0...n) 623 * Must be 0 for other tables. 624 * Table - Where a pointer to the table is returned 625 * Address - Where the table physical address is returned 626 * 627 * RETURN: Status; Table buffer and physical address returned if AE_OK. 628 * AE_LIMIT: Instance is beyond valid limit 629 * AE_NOT_FOUND: A table with the signature was not found 630 * 631 * DESCRIPTION: Get an ACPI table via the root table (RSDT/XSDT) 632 * 633 * NOTE: Assumes the input signature is uppercase. 634 * 635 *****************************************************************************/ 636 637static ACPI_STATUS 638OslGetTableViaRoot ( 639 char *Signature, 640 UINT32 Instance, 641 ACPI_TABLE_HEADER **Table, 642 ACPI_PHYSICAL_ADDRESS *Address) 643{ 644 ACPI_TABLE_HEADER *LocalTable = NULL; 645 ACPI_TABLE_HEADER *MappedTable = NULL; 646 UINT8 NumberOfTables; 647 UINT32 CurrentInstance = 0; 648 ACPI_PHYSICAL_ADDRESS TableAddress = 0; 649 ACPI_STATUS Status; 650 UINT32 i; 651 652 653 /* DSDT and FACS address must be extracted from the FADT */ 654 655 if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_DSDT) || 656 ACPI_COMPARE_NAME (Signature, ACPI_SIG_FACS)) 657 { 658 /* 659 * Get the appropriate address, either 32-bit or 64-bit. Be very 660 * careful about the FADT length and validate table addresses. 661 * Note: The 64-bit addresses have priority. 662 */ 663 if (ACPI_COMPARE_NAME (Signature, ACPI_SIG_DSDT)) 664 { 665 if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XDSDT) && 666 Gbl_Fadt->XDsdt) 667 { 668 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XDsdt; 669 } 670 else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_DSDT) && 671 Gbl_Fadt->Dsdt) 672 { 673 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Dsdt; 674 } 675 } 676 else /* FACS */ 677 { 678 if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_XFACS) && 679 Gbl_Fadt->XFacs) 680 { 681 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->XFacs; 682 } 683 else if ((Gbl_Fadt->Header.Length >= MIN_FADT_FOR_FACS) && 684 Gbl_Fadt->Facs) 685 { 686 TableAddress = (ACPI_PHYSICAL_ADDRESS) Gbl_Fadt->Facs; 687 } 688 } 689 } 690 else /* Case for a normal ACPI table */ 691 { 692 if (Gbl_Revision) 693 { 694 NumberOfTables = 695 (Gbl_Xsdt->Header.Length - sizeof (Gbl_Xsdt->Header)) 696 / sizeof (Gbl_Xsdt->TableOffsetEntry[0]); 697 } 698 else /* Use RSDT if XSDT is not available */ 699 { 700 NumberOfTables = 701 (Gbl_Rsdt->Header.Length - sizeof (Gbl_Rsdt->Header)) 702 / sizeof (Gbl_Rsdt->TableOffsetEntry[0]); 703 } 704 705 /* Search RSDT/XSDT for the requested table */ 706 707 for (i = 0; i < NumberOfTables; i++) 708 { 709 if (Gbl_Revision) 710 { 711 TableAddress = Gbl_Xsdt->TableOffsetEntry[i]; 712 } 713 else 714 { 715 TableAddress = Gbl_Rsdt->TableOffsetEntry[i]; 716 } 717 718 MappedTable = AcpiOsMapMemory (TableAddress, sizeof (*MappedTable)); 719 if (!MappedTable) 720 { 721 return (AE_BAD_ADDRESS); 722 } 723 724 /* Does this table match the requested signature? */ 725 726 if (ACPI_COMPARE_NAME (MappedTable->Signature, Signature)) 727 { 728 729 /* Match table instance (for SSDT/UEFI tables) */ 730 731 if (CurrentInstance == Instance) 732 { 733 AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable)); 734 break; 735 } 736 737 CurrentInstance++; 738 } 739 740 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 741 TableAddress = 0; 742 } 743 } 744 745 if (!TableAddress) 746 { 747 if (CurrentInstance) 748 { 749 return (AE_LIMIT); 750 } 751 return (AE_NOT_FOUND); 752 } 753 754 /* Now we can get the requested table */ 755 756 Status = OslMapTable (TableAddress, Signature, &MappedTable); 757 if (ACPI_FAILURE (Status)) 758 { 759 return (Status); 760 } 761 762 /* Copy table to local buffer and return it */ 763 764 LocalTable = calloc (1, MappedTable->Length); 765 if (!LocalTable) 766 { 767 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 768 return (AE_NO_MEMORY); 769 } 770 771 memcpy (LocalTable, MappedTable, MappedTable->Length); 772 AcpiOsUnmapMemory (MappedTable, MappedTable->Length); 773 *Table = LocalTable; 774 *Address = TableAddress; 775 return (AE_OK); 776} 777 778 779/****************************************************************************** 780 * 781 * FUNCTION: OslAddTablesToList 782 * 783 * PARAMETERS: None 784 * 785 * RETURN: Status; Table list is initialized if AE_OK. 786 * 787 * DESCRIPTION: Add ACPI tables to the table list. 788 * 789 *****************************************************************************/ 790 791static ACPI_STATUS 792OslAddTablesToList( 793 void) 794{ 795 ACPI_PHYSICAL_ADDRESS TableAddress; 796 OSL_TABLE_INFO *Info = NULL; 797 OSL_TABLE_INFO *NewInfo; 798 ACPI_TABLE_HEADER *Table; 799 UINT8 Instance; 800 UINT8 NumberOfTables; 801 int i; 802 803 804 /* Initialize the table list on first invocation */ 805 806 if (Gbl_TableListInitialized) 807 { 808 return (AE_OK); 809 } 810 811 /* Add mandatory tables to global table list first */ 812 813 for (i = 0; i < 4; i++) 814 { 815 NewInfo = calloc (1, sizeof (*NewInfo)); 816 if (!NewInfo) 817 { 818 return (AE_NO_MEMORY); 819 } 820 821 switch (i) { 822 case 0: 823 824 Gbl_TableListHead = Info = NewInfo; 825 continue; 826 827 case 1: 828 829 ACPI_MOVE_NAME (NewInfo->Signature, 830 Gbl_Revision ? ACPI_SIG_XSDT : ACPI_SIG_RSDT); 831 break; 832 833 case 2: 834 835 ACPI_MOVE_NAME (NewInfo->Signature, ACPI_SIG_FACS); 836 break; 837 838 default: 839 840 ACPI_MOVE_NAME (NewInfo->Signature, ACPI_SIG_DSDT); 841 842 } 843 844 Info->Next = NewInfo; 845 Info = NewInfo; 846 Gbl_TableListHead->Instance++; 847 } 848 849 /* Add normal tables from RSDT/XSDT to global list */ 850 851 if (Gbl_Revision) 852 { 853 NumberOfTables = 854 (Gbl_Xsdt->Header.Length - sizeof (Gbl_Xsdt->Header)) 855 / sizeof (Gbl_Xsdt->TableOffsetEntry[0]); 856 } 857 else 858 { 859 NumberOfTables = 860 (Gbl_Rsdt->Header.Length - sizeof (Gbl_Rsdt->Header)) 861 / sizeof (Gbl_Rsdt->TableOffsetEntry[0]); 862 } 863 864 for (i = 0; i < NumberOfTables; i++) 865 { 866 if (Gbl_Revision) 867 { 868 TableAddress = Gbl_Xsdt->TableOffsetEntry[i]; 869 } 870 else 871 { 872 TableAddress = Gbl_Rsdt->TableOffsetEntry[i]; 873 } 874 875 Table = AcpiOsMapMemory (TableAddress, sizeof (*Table)); 876 if (!Table) 877 { 878 return (AE_BAD_ADDRESS); 879 } 880 881 Instance = 0; 882 NewInfo = Gbl_TableListHead; 883 while (NewInfo->Next != NULL) 884 { 885 NewInfo = NewInfo->Next; 886 if (ACPI_COMPARE_NAME (Table->Signature, NewInfo->Signature)) 887 { 888 Instance++; 889 } 890 } 891 892 NewInfo = calloc (1, sizeof (*NewInfo)); 893 if (!NewInfo) 894 { 895 AcpiOsUnmapMemory (Table, sizeof (*Table)); 896 return (AE_NO_MEMORY); 897 } 898 899 ACPI_MOVE_NAME (NewInfo->Signature, Table->Signature); 900 901 AcpiOsUnmapMemory (Table, sizeof (*Table)); 902 903 NewInfo->Instance = Instance; 904 NewInfo->Address = TableAddress; 905 Info->Next = NewInfo; 906 Info = NewInfo; 907 Gbl_TableListHead->Instance++; 908 } 909 910 Gbl_TableListInitialized = TRUE; 911 return (AE_OK); 912} 913 914 915/****************************************************************************** 916 * 917 * FUNCTION: OslMapTable 918 * 919 * PARAMETERS: Address - Address of the table in memory 920 * Signature - Optional ACPI Signature for desired table. 921 * Null terminated 4-character string. 922 * Table - Where a pointer to the mapped table is 923 * returned 924 * 925 * RETURN: Status; Mapped table is returned if AE_OK. 926 * 927 * DESCRIPTION: Map entire ACPI table into caller's address space. Also 928 * validates the table and checksum. 929 * 930 *****************************************************************************/ 931 932static ACPI_STATUS 933OslMapTable ( 934 ACPI_SIZE Address, 935 char *Signature, 936 ACPI_TABLE_HEADER **Table) 937{ 938 ACPI_TABLE_HEADER *MappedTable; 939 UINT32 Length; 940 941 942 /* Map the header so we can get the table length */ 943 944 MappedTable = AcpiOsMapMemory (Address, sizeof (*MappedTable)); 945 if (!MappedTable) 946 { 947 return (AE_BAD_ADDRESS); 948 } 949 950 /* Check if table is valid */ 951 952 if (!ApIsValidHeader (MappedTable)) 953 { 954 AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable)); 955 return (AE_BAD_HEADER); 956 } 957 958 /* If specified, signature must match */ 959 960 if (Signature && 961 !ACPI_COMPARE_NAME (Signature, MappedTable->Signature)) 962 { 963 AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable)); 964 return (AE_NOT_EXIST); 965 } 966 967 /* Map the entire table */ 968 969 Length = MappedTable->Length; 970 AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable)); 971 972 MappedTable = AcpiOsMapMemory (Address, Length); 973 if (!MappedTable) 974 { 975 return (AE_BAD_ADDRESS); 976 } 977 978 (void) ApIsValidChecksum (MappedTable); 979 980 *Table = MappedTable; 981 982 return (AE_OK); 983} 984