1 /****************************************************************************** 2 * 3 * Module Name: tbutils - table utilities 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2009, 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 #define __TBUTILS_C__ 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "actables.h" 121 122 #define _COMPONENT ACPI_TABLES 123 ACPI_MODULE_NAME ("tbutils") 124 125 /* Local prototypes */ 126 127 static ACPI_PHYSICAL_ADDRESS 128 AcpiTbGetRootTableEntry ( 129 UINT8 *TableEntry, 130 UINT32 TableEntrySize); 131 132 133 /******************************************************************************* 134 * 135 * FUNCTION: AcpiTbInitializeFacs 136 * 137 * PARAMETERS: None 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global 142 * for accessing the Global Lock and Firmware Waking Vector 143 * 144 ******************************************************************************/ 145 146 ACPI_STATUS 147 AcpiTbInitializeFacs ( 148 void) 149 { 150 ACPI_STATUS Status; 151 152 153 Status = AcpiGetTableByIndex (ACPI_TABLE_INDEX_FACS, 154 ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &AcpiGbl_FACS)); 155 return (Status); 156 } 157 158 159 /******************************************************************************* 160 * 161 * FUNCTION: AcpiTbTablesLoaded 162 * 163 * PARAMETERS: None 164 * 165 * RETURN: TRUE if required ACPI tables are loaded 166 * 167 * DESCRIPTION: Determine if the minimum required ACPI tables are present 168 * (FADT, FACS, DSDT) 169 * 170 ******************************************************************************/ 171 172 BOOLEAN 173 AcpiTbTablesLoaded ( 174 void) 175 { 176 177 if (AcpiGbl_RootTableList.Count >= 3) 178 { 179 return (TRUE); 180 } 181 182 return (FALSE); 183 } 184 185 186 /******************************************************************************* 187 * 188 * FUNCTION: AcpiTbPrintTableHeader 189 * 190 * PARAMETERS: Address - Table physical address 191 * Header - Table header 192 * 193 * RETURN: None 194 * 195 * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. 196 * 197 ******************************************************************************/ 198 199 void 200 AcpiTbPrintTableHeader ( 201 ACPI_PHYSICAL_ADDRESS Address, 202 ACPI_TABLE_HEADER *Header) 203 { 204 205 /* 206 * The reason that the Address is cast to a void pointer is so that we 207 * can use %p which will work properly on both 32-bit and 64-bit hosts. 208 */ 209 if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_FACS)) 210 { 211 /* FACS only has signature and length fields */ 212 213 ACPI_INFO ((AE_INFO, "%4.4s %p %05X", 214 Header->Signature, ACPI_CAST_PTR (void, Address), 215 Header->Length)); 216 } 217 else if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_RSDP)) 218 { 219 /* RSDP has no common fields */ 220 221 ACPI_INFO ((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", 222 ACPI_CAST_PTR (void, Address), 223 (ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ? 224 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20, 225 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision, 226 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->OemId)); 227 } 228 else 229 { 230 /* Standard ACPI table with full common header */ 231 232 ACPI_INFO ((AE_INFO, 233 "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", 234 Header->Signature, ACPI_CAST_PTR (void, Address), 235 Header->Length, Header->Revision, Header->OemId, 236 Header->OemTableId, Header->OemRevision, Header->AslCompilerId, 237 Header->AslCompilerRevision)); 238 } 239 } 240 241 242 /******************************************************************************* 243 * 244 * FUNCTION: AcpiTbValidateChecksum 245 * 246 * PARAMETERS: Table - ACPI table to verify 247 * Length - Length of entire table 248 * 249 * RETURN: Status 250 * 251 * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns 252 * exception on bad checksum. 253 * 254 ******************************************************************************/ 255 256 ACPI_STATUS 257 AcpiTbVerifyChecksum ( 258 ACPI_TABLE_HEADER *Table, 259 UINT32 Length) 260 { 261 UINT8 Checksum; 262 263 264 /* Compute the checksum on the table */ 265 266 Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length); 267 268 /* Checksum ok? (should be zero) */ 269 270 if (Checksum) 271 { 272 ACPI_WARNING ((AE_INFO, 273 "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", 274 Table->Signature, Table->Checksum, 275 (UINT8) (Table->Checksum - Checksum))); 276 277 #if (ACPI_CHECKSUM_ABORT) 278 return (AE_BAD_CHECKSUM); 279 #endif 280 } 281 282 return (AE_OK); 283 } 284 285 286 /******************************************************************************* 287 * 288 * FUNCTION: AcpiTbChecksum 289 * 290 * PARAMETERS: Buffer - Pointer to memory region to be checked 291 * Length - Length of this memory region 292 * 293 * RETURN: Checksum (UINT8) 294 * 295 * DESCRIPTION: Calculates circular checksum of memory region. 296 * 297 ******************************************************************************/ 298 299 UINT8 300 AcpiTbChecksum ( 301 UINT8 *Buffer, 302 UINT32 Length) 303 { 304 UINT8 Sum = 0; 305 UINT8 *End = Buffer + Length; 306 307 308 while (Buffer < End) 309 { 310 Sum = (UINT8) (Sum + *(Buffer++)); 311 } 312 313 return Sum; 314 } 315 316 317 /******************************************************************************* 318 * 319 * FUNCTION: AcpiTbInstallTable 320 * 321 * PARAMETERS: Address - Physical address of DSDT or FACS 322 * Signature - Table signature, NULL if no need to 323 * match 324 * TableIndex - Index into root table array 325 * 326 * RETURN: None 327 * 328 * DESCRIPTION: Install an ACPI table into the global data structure. The 329 * table override mechanism is implemented here to allow the host 330 * OS to replace any table before it is installed in the root 331 * table array. 332 * 333 ******************************************************************************/ 334 335 void 336 AcpiTbInstallTable ( 337 ACPI_PHYSICAL_ADDRESS Address, 338 char *Signature, 339 UINT32 TableIndex) 340 { 341 UINT8 Flags; 342 ACPI_STATUS Status; 343 ACPI_TABLE_HEADER *TableToInstall; 344 ACPI_TABLE_HEADER *MappedTable; 345 ACPI_TABLE_HEADER *OverrideTable = NULL; 346 347 348 if (!Address) 349 { 350 ACPI_ERROR ((AE_INFO, "Null physical address for ACPI table [%s]", 351 Signature)); 352 return; 353 } 354 355 /* Map just the table header */ 356 357 MappedTable = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); 358 if (!MappedTable) 359 { 360 return; 361 } 362 363 /* If a particular signature is expected (DSDT/FACS), it must match */ 364 365 if (Signature && 366 !ACPI_COMPARE_NAME (MappedTable->Signature, Signature)) 367 { 368 ACPI_ERROR ((AE_INFO, 369 "Invalid signature 0x%X for ACPI table, expected [%s]", 370 *ACPI_CAST_PTR (UINT32, MappedTable->Signature), Signature)); 371 goto UnmapAndExit; 372 } 373 374 /* 375 * ACPI Table Override: 376 * 377 * Before we install the table, let the host OS override it with a new 378 * one if desired. Any table within the RSDT/XSDT can be replaced, 379 * including the DSDT which is pointed to by the FADT. 380 */ 381 Status = AcpiOsTableOverride (MappedTable, &OverrideTable); 382 if (ACPI_SUCCESS (Status) && OverrideTable) 383 { 384 ACPI_INFO ((AE_INFO, 385 "%4.4s @ 0x%p Table override, replaced with:", 386 MappedTable->Signature, ACPI_CAST_PTR (void, Address))); 387 388 AcpiGbl_RootTableList.Tables[TableIndex].Pointer = OverrideTable; 389 Address = ACPI_PTR_TO_PHYSADDR (OverrideTable); 390 391 TableToInstall = OverrideTable; 392 Flags = ACPI_TABLE_ORIGIN_OVERRIDE; 393 } 394 else 395 { 396 TableToInstall = MappedTable; 397 Flags = ACPI_TABLE_ORIGIN_MAPPED; 398 } 399 400 /* Initialize the table entry */ 401 402 AcpiGbl_RootTableList.Tables[TableIndex].Address = Address; 403 AcpiGbl_RootTableList.Tables[TableIndex].Length = TableToInstall->Length; 404 AcpiGbl_RootTableList.Tables[TableIndex].Flags = Flags; 405 406 ACPI_MOVE_32_TO_32 ( 407 &(AcpiGbl_RootTableList.Tables[TableIndex].Signature), 408 TableToInstall->Signature); 409 410 AcpiTbPrintTableHeader (Address, TableToInstall); 411 412 if (TableIndex == ACPI_TABLE_INDEX_DSDT) 413 { 414 /* Global integer width is based upon revision of the DSDT */ 415 416 AcpiUtSetIntegerWidth (TableToInstall->Revision); 417 } 418 419 UnmapAndExit: 420 AcpiOsUnmapMemory (MappedTable, sizeof (ACPI_TABLE_HEADER)); 421 } 422 423 424 /******************************************************************************* 425 * 426 * FUNCTION: AcpiTbGetRootTableEntry 427 * 428 * PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry 429 * TableEntrySize - sizeof 32 or 64 (RSDT or XSDT) 430 * 431 * RETURN: Physical address extracted from the root table 432 * 433 * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on 434 * both 32-bit and 64-bit platforms 435 * 436 * NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on 437 * 64-bit platforms. 438 * 439 ******************************************************************************/ 440 441 static ACPI_PHYSICAL_ADDRESS 442 AcpiTbGetRootTableEntry ( 443 UINT8 *TableEntry, 444 UINT32 TableEntrySize) 445 { 446 UINT64 Address64; 447 448 449 /* 450 * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): 451 * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT 452 */ 453 if (TableEntrySize == sizeof (UINT32)) 454 { 455 /* 456 * 32-bit platform, RSDT: Return 32-bit table entry 457 * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return 458 */ 459 return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR (UINT32, TableEntry))); 460 } 461 else 462 { 463 /* 464 * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return 465 * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, 466 * return 64-bit 467 */ 468 ACPI_MOVE_64_TO_64 (&Address64, TableEntry); 469 470 #if ACPI_MACHINE_WIDTH == 32 471 if (Address64 > ACPI_UINT32_MAX) 472 { 473 /* Will truncate 64-bit address to 32 bits, issue warning */ 474 475 ACPI_WARNING ((AE_INFO, 476 "64-bit Physical Address in XSDT is too large (%8.8X%8.8X)," 477 " truncating", 478 ACPI_FORMAT_UINT64 (Address64))); 479 } 480 #endif 481 return ((ACPI_PHYSICAL_ADDRESS) (Address64)); 482 } 483 } 484 485 486 /******************************************************************************* 487 * 488 * FUNCTION: AcpiTbParseRootTable 489 * 490 * PARAMETERS: Rsdp - Pointer to the RSDP 491 * 492 * RETURN: Status 493 * 494 * DESCRIPTION: This function is called to parse the Root System Description 495 * Table (RSDT or XSDT) 496 * 497 * NOTE: Tables are mapped (not copied) for efficiency. The FACS must 498 * be mapped and cannot be copied because it contains the actual 499 * memory location of the ACPI Global Lock. 500 * 501 ******************************************************************************/ 502 503 ACPI_STATUS 504 AcpiTbParseRootTable ( 505 ACPI_PHYSICAL_ADDRESS RsdpAddress) 506 { 507 ACPI_TABLE_RSDP *Rsdp; 508 UINT32 TableEntrySize; 509 UINT32 i; 510 UINT32 TableCount; 511 ACPI_TABLE_HEADER *Table; 512 ACPI_PHYSICAL_ADDRESS Address; 513 UINT32 Length; 514 UINT8 *TableEntry; 515 ACPI_STATUS Status; 516 517 518 ACPI_FUNCTION_TRACE (TbParseRootTable); 519 520 521 /* 522 * Map the entire RSDP and extract the address of the RSDT or XSDT 523 */ 524 Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP)); 525 if (!Rsdp) 526 { 527 return_ACPI_STATUS (AE_NO_MEMORY); 528 } 529 530 AcpiTbPrintTableHeader (RsdpAddress, 531 ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp)); 532 533 /* Differentiate between RSDT and XSDT root tables */ 534 535 if (Rsdp->Revision > 1 && Rsdp->XsdtPhysicalAddress) 536 { 537 /* 538 * Root table is an XSDT (64-bit physical addresses). We must use the 539 * XSDT if the revision is > 1 and the XSDT pointer is present, as per 540 * the ACPI specification. 541 */ 542 Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress; 543 TableEntrySize = sizeof (UINT64); 544 } 545 else 546 { 547 /* Root table is an RSDT (32-bit physical addresses) */ 548 549 Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress; 550 TableEntrySize = sizeof (UINT32); 551 } 552 553 /* 554 * It is not possible to map more than one entry in some environments, 555 * so unmap the RSDP here before mapping other tables 556 */ 557 AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP)); 558 559 560 /* Map the RSDT/XSDT table header to get the full table length */ 561 562 Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); 563 if (!Table) 564 { 565 return_ACPI_STATUS (AE_NO_MEMORY); 566 } 567 568 AcpiTbPrintTableHeader (Address, Table); 569 570 /* Get the length of the full table, verify length and map entire table */ 571 572 Length = Table->Length; 573 AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER)); 574 575 if (Length < sizeof (ACPI_TABLE_HEADER)) 576 { 577 ACPI_ERROR ((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", Length)); 578 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); 579 } 580 581 Table = AcpiOsMapMemory (Address, Length); 582 if (!Table) 583 { 584 return_ACPI_STATUS (AE_NO_MEMORY); 585 } 586 587 /* Validate the root table checksum */ 588 589 Status = AcpiTbVerifyChecksum (Table, Length); 590 if (ACPI_FAILURE (Status)) 591 { 592 AcpiOsUnmapMemory (Table, Length); 593 return_ACPI_STATUS (Status); 594 } 595 596 /* Calculate the number of tables described in the root table */ 597 598 TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) / 599 TableEntrySize); 600 601 /* 602 * First two entries in the table array are reserved for the DSDT 603 * and FACS, which are not actually present in the RSDT/XSDT - they 604 * come from the FADT 605 */ 606 TableEntry = ACPI_CAST_PTR (UINT8, Table) + sizeof (ACPI_TABLE_HEADER); 607 AcpiGbl_RootTableList.Count = 2; 608 609 /* 610 * Initialize the root table array from the RSDT/XSDT 611 */ 612 for (i = 0; i < TableCount; i++) 613 { 614 if (AcpiGbl_RootTableList.Count >= AcpiGbl_RootTableList.Size) 615 { 616 /* There is no more room in the root table array, attempt resize */ 617 618 Status = AcpiTbResizeRootTableList (); 619 if (ACPI_FAILURE (Status)) 620 { 621 ACPI_WARNING ((AE_INFO, "Truncating %u table entries!", 622 (unsigned) (TableCount - 623 (AcpiGbl_RootTableList.Count - 2)))); 624 break; 625 } 626 } 627 628 /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ 629 630 AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.Count].Address = 631 AcpiTbGetRootTableEntry (TableEntry, TableEntrySize); 632 633 TableEntry += TableEntrySize; 634 AcpiGbl_RootTableList.Count++; 635 } 636 637 /* 638 * It is not possible to map more than one entry in some environments, 639 * so unmap the root table here before mapping other tables 640 */ 641 AcpiOsUnmapMemory (Table, Length); 642 643 /* 644 * Complete the initialization of the root table array by examining 645 * the header of each table 646 */ 647 for (i = 2; i < AcpiGbl_RootTableList.Count; i++) 648 { 649 AcpiTbInstallTable (AcpiGbl_RootTableList.Tables[i].Address, 650 NULL, i); 651 652 /* Special case for FADT - get the DSDT and FACS */ 653 654 if (ACPI_COMPARE_NAME ( 655 &AcpiGbl_RootTableList.Tables[i].Signature, ACPI_SIG_FADT)) 656 { 657 AcpiTbParseFadt (i); 658 } 659 } 660 661 return_ACPI_STATUS (AE_OK); 662 } 663