1 /****************************************************************************** 2 * 3 * Module Name: hwxface - Public ACPICA hardware interfaces 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 #define EXPORT_ACPI_INTERFACES 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "acnamesp.h" 121 122 #define _COMPONENT ACPI_HARDWARE 123 ACPI_MODULE_NAME ("hwxface") 124 125 126 /****************************************************************************** 127 * 128 * FUNCTION: AcpiReset 129 * 130 * PARAMETERS: None 131 * 132 * RETURN: Status 133 * 134 * DESCRIPTION: Set reset register in memory or IO space. Note: Does not 135 * support reset register in PCI config space, this must be 136 * handled separately. 137 * 138 ******************************************************************************/ 139 140 ACPI_STATUS 141 AcpiReset ( 142 void) 143 { 144 ACPI_GENERIC_ADDRESS *ResetReg; 145 ACPI_STATUS Status; 146 147 148 ACPI_FUNCTION_TRACE (AcpiReset); 149 150 151 ResetReg = &AcpiGbl_FADT.ResetRegister; 152 153 /* Check if the reset register is supported */ 154 155 if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || 156 !ResetReg->Address) 157 { 158 return_ACPI_STATUS (AE_NOT_EXIST); 159 } 160 161 if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO) 162 { 163 /* 164 * For I/O space, write directly to the OSL. This bypasses the port 165 * validation mechanism, which may block a valid write to the reset 166 * register. 167 * 168 * NOTE: 169 * The ACPI spec requires the reset register width to be 8, so we 170 * hardcode it here and ignore the FADT value. This maintains 171 * compatibility with other ACPI implementations that have allowed 172 * BIOS code with bad register width values to go unnoticed. 173 */ 174 Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address, 175 AcpiGbl_FADT.ResetValue, ACPI_RESET_REGISTER_WIDTH); 176 } 177 else 178 { 179 /* Write the reset value to the reset register */ 180 181 Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg); 182 } 183 184 return_ACPI_STATUS (Status); 185 } 186 187 ACPI_EXPORT_SYMBOL (AcpiReset) 188 189 190 /****************************************************************************** 191 * 192 * FUNCTION: AcpiRead 193 * 194 * PARAMETERS: Value - Where the value is returned 195 * Reg - GAS register structure 196 * 197 * RETURN: Status 198 * 199 * DESCRIPTION: Read from either memory or IO space. 200 * 201 * LIMITATIONS: <These limitations also apply to AcpiWrite> 202 * BitWidth must be exactly 8, 16, 32, or 64. 203 * SpaceID must be SystemMemory or SystemIO. 204 * BitOffset and AccessWidth are currently ignored, as there has 205 * not been a need to implement these. 206 * 207 ******************************************************************************/ 208 209 ACPI_STATUS 210 AcpiRead ( 211 UINT64 *ReturnValue, 212 ACPI_GENERIC_ADDRESS *Reg) 213 { 214 UINT32 ValueLo; 215 UINT32 ValueHi; 216 UINT32 Width; 217 UINT64 Address; 218 ACPI_STATUS Status; 219 220 221 ACPI_FUNCTION_NAME (AcpiRead); 222 223 224 if (!ReturnValue) 225 { 226 return (AE_BAD_PARAMETER); 227 } 228 229 /* Validate contents of the GAS register. Allow 64-bit transfers */ 230 231 Status = AcpiHwValidateRegister (Reg, 64, &Address); 232 if (ACPI_FAILURE (Status)) 233 { 234 return (Status); 235 } 236 237 /* 238 * Two address spaces supported: Memory or I/O. PCI_Config is 239 * not supported here because the GAS structure is insufficient 240 */ 241 if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) 242 { 243 Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS) 244 Address, ReturnValue, Reg->BitWidth); 245 if (ACPI_FAILURE (Status)) 246 { 247 return (Status); 248 } 249 } 250 else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ 251 { 252 ValueLo = 0; 253 ValueHi = 0; 254 255 Width = Reg->BitWidth; 256 if (Width == 64) 257 { 258 Width = 32; /* Break into two 32-bit transfers */ 259 } 260 261 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) 262 Address, &ValueLo, Width); 263 if (ACPI_FAILURE (Status)) 264 { 265 return (Status); 266 } 267 268 if (Reg->BitWidth == 64) 269 { 270 /* Read the top 32 bits */ 271 272 Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) 273 (Address + 4), &ValueHi, 32); 274 if (ACPI_FAILURE (Status)) 275 { 276 return (Status); 277 } 278 } 279 280 /* Set the return value only if status is AE_OK */ 281 282 *ReturnValue = (ValueLo | ((UINT64) ValueHi << 32)); 283 } 284 285 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 286 "Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n", 287 ACPI_FORMAT_UINT64 (*ReturnValue), Reg->BitWidth, 288 ACPI_FORMAT_UINT64 (Address), 289 AcpiUtGetRegionName (Reg->SpaceId))); 290 291 return (AE_OK); 292 } 293 294 ACPI_EXPORT_SYMBOL (AcpiRead) 295 296 297 /****************************************************************************** 298 * 299 * FUNCTION: AcpiWrite 300 * 301 * PARAMETERS: Value - Value to be written 302 * Reg - GAS register structure 303 * 304 * RETURN: Status 305 * 306 * DESCRIPTION: Write to either memory or IO space. 307 * 308 ******************************************************************************/ 309 310 ACPI_STATUS 311 AcpiWrite ( 312 UINT64 Value, 313 ACPI_GENERIC_ADDRESS *Reg) 314 { 315 UINT32 Width; 316 UINT64 Address; 317 ACPI_STATUS Status; 318 319 320 ACPI_FUNCTION_NAME (AcpiWrite); 321 322 323 /* Validate contents of the GAS register. Allow 64-bit transfers */ 324 325 Status = AcpiHwValidateRegister (Reg, 64, &Address); 326 if (ACPI_FAILURE (Status)) 327 { 328 return (Status); 329 } 330 331 /* 332 * Two address spaces supported: Memory or IO. PCI_Config is 333 * not supported here because the GAS structure is insufficient 334 */ 335 if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) 336 { 337 Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS) 338 Address, Value, Reg->BitWidth); 339 if (ACPI_FAILURE (Status)) 340 { 341 return (Status); 342 } 343 } 344 else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ 345 { 346 Width = Reg->BitWidth; 347 if (Width == 64) 348 { 349 Width = 32; /* Break into two 32-bit transfers */ 350 } 351 352 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) 353 Address, ACPI_LODWORD (Value), Width); 354 if (ACPI_FAILURE (Status)) 355 { 356 return (Status); 357 } 358 359 if (Reg->BitWidth == 64) 360 { 361 Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) 362 (Address + 4), ACPI_HIDWORD (Value), 32); 363 if (ACPI_FAILURE (Status)) 364 { 365 return (Status); 366 } 367 } 368 } 369 370 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 371 "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n", 372 ACPI_FORMAT_UINT64 (Value), Reg->BitWidth, 373 ACPI_FORMAT_UINT64 (Address), 374 AcpiUtGetRegionName (Reg->SpaceId))); 375 376 return (Status); 377 } 378 379 ACPI_EXPORT_SYMBOL (AcpiWrite) 380 381 382 #if (!ACPI_REDUCED_HARDWARE) 383 /******************************************************************************* 384 * 385 * FUNCTION: AcpiReadBitRegister 386 * 387 * PARAMETERS: RegisterId - ID of ACPI Bit Register to access 388 * ReturnValue - Value that was read from the register, 389 * normalized to bit position zero. 390 * 391 * RETURN: Status and the value read from the specified Register. Value 392 * returned is normalized to bit0 (is shifted all the way right) 393 * 394 * DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock. 395 * 396 * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and 397 * PM2 Control. 398 * 399 * Note: The hardware lock is not required when reading the ACPI bit registers 400 * since almost all of them are single bit and it does not matter that 401 * the parent hardware register can be split across two physical 402 * registers. The only multi-bit field is SLP_TYP in the PM1 control 403 * register, but this field does not cross an 8-bit boundary (nor does 404 * it make much sense to actually read this field.) 405 * 406 ******************************************************************************/ 407 408 ACPI_STATUS 409 AcpiReadBitRegister ( 410 UINT32 RegisterId, 411 UINT32 *ReturnValue) 412 { 413 ACPI_BIT_REGISTER_INFO *BitRegInfo; 414 UINT32 RegisterValue; 415 UINT32 Value; 416 ACPI_STATUS Status; 417 418 419 ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId); 420 421 422 /* Get the info structure corresponding to the requested ACPI Register */ 423 424 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 425 if (!BitRegInfo) 426 { 427 return_ACPI_STATUS (AE_BAD_PARAMETER); 428 } 429 430 /* Read the entire parent register */ 431 432 Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, 433 &RegisterValue); 434 if (ACPI_FAILURE (Status)) 435 { 436 return_ACPI_STATUS (Status); 437 } 438 439 /* Normalize the value that was read, mask off other bits */ 440 441 Value = ((RegisterValue & BitRegInfo->AccessBitMask) 442 >> BitRegInfo->BitPosition); 443 444 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 445 "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n", 446 RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value)); 447 448 *ReturnValue = Value; 449 return_ACPI_STATUS (AE_OK); 450 } 451 452 ACPI_EXPORT_SYMBOL (AcpiReadBitRegister) 453 454 455 /******************************************************************************* 456 * 457 * FUNCTION: AcpiWriteBitRegister 458 * 459 * PARAMETERS: RegisterId - ID of ACPI Bit Register to access 460 * Value - Value to write to the register, in bit 461 * position zero. The bit is automatically 462 * shifted to the correct position. 463 * 464 * RETURN: Status 465 * 466 * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock 467 * since most operations require a read/modify/write sequence. 468 * 469 * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and 470 * PM2 Control. 471 * 472 * Note that at this level, the fact that there may be actually two 473 * hardware registers (A and B - and B may not exist) is abstracted. 474 * 475 ******************************************************************************/ 476 477 ACPI_STATUS 478 AcpiWriteBitRegister ( 479 UINT32 RegisterId, 480 UINT32 Value) 481 { 482 ACPI_BIT_REGISTER_INFO *BitRegInfo; 483 ACPI_CPU_FLAGS LockFlags; 484 UINT32 RegisterValue; 485 ACPI_STATUS Status = AE_OK; 486 487 488 ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId); 489 490 491 /* Get the info structure corresponding to the requested ACPI Register */ 492 493 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 494 if (!BitRegInfo) 495 { 496 return_ACPI_STATUS (AE_BAD_PARAMETER); 497 } 498 499 LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock); 500 501 /* 502 * At this point, we know that the parent register is one of the 503 * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control 504 */ 505 if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS) 506 { 507 /* 508 * 1) Case for PM1 Enable, PM1 Control, and PM2 Control 509 * 510 * Perform a register read to preserve the bits that we are not 511 * interested in 512 */ 513 Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, 514 &RegisterValue); 515 if (ACPI_FAILURE (Status)) 516 { 517 goto UnlockAndExit; 518 } 519 520 /* 521 * Insert the input bit into the value that was just read 522 * and write the register 523 */ 524 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 525 BitRegInfo->AccessBitMask, Value); 526 527 Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister, 528 RegisterValue); 529 } 530 else 531 { 532 /* 533 * 2) Case for PM1 Status 534 * 535 * The Status register is different from the rest. Clear an event 536 * by writing 1, writing 0 has no effect. So, the only relevant 537 * information is the single bit we're interested in, all others 538 * should be written as 0 so they will be left unchanged. 539 */ 540 RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value, 541 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 542 543 /* No need to write the register if value is all zeros */ 544 545 if (RegisterValue) 546 { 547 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS, 548 RegisterValue); 549 } 550 } 551 552 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 553 "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n", 554 RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue)); 555 556 557 UnlockAndExit: 558 559 AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags); 560 return_ACPI_STATUS (Status); 561 } 562 563 ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister) 564 565 #endif /* !ACPI_REDUCED_HARDWARE */ 566 567 568 /******************************************************************************* 569 * 570 * FUNCTION: AcpiGetSleepTypeData 571 * 572 * PARAMETERS: SleepState - Numeric sleep state 573 * *SleepTypeA - Where SLP_TYPa is returned 574 * *SleepTypeB - Where SLP_TYPb is returned 575 * 576 * RETURN: Status 577 * 578 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested 579 * sleep state via the appropriate \_Sx object. 580 * 581 * The sleep state package returned from the corresponding \_Sx_ object 582 * must contain at least one integer. 583 * 584 * March 2005: 585 * Added support for a package that contains two integers. This 586 * goes against the ACPI specification which defines this object as a 587 * package with one encoded DWORD integer. However, existing practice 588 * by many BIOS vendors is to return a package with 2 or more integer 589 * elements, at least one per sleep type (A/B). 590 * 591 * January 2013: 592 * Therefore, we must be prepared to accept a package with either a 593 * single integer or multiple integers. 594 * 595 * The single integer DWORD format is as follows: 596 * BYTE 0 - Value for the PM1A SLP_TYP register 597 * BYTE 1 - Value for the PM1B SLP_TYP register 598 * BYTE 2-3 - Reserved 599 * 600 * The dual integer format is as follows: 601 * Integer 0 - Value for the PM1A SLP_TYP register 602 * Integer 1 - Value for the PM1A SLP_TYP register 603 * 604 ******************************************************************************/ 605 606 ACPI_STATUS 607 AcpiGetSleepTypeData ( 608 UINT8 SleepState, 609 UINT8 *SleepTypeA, 610 UINT8 *SleepTypeB) 611 { 612 ACPI_STATUS Status; 613 ACPI_EVALUATE_INFO *Info; 614 ACPI_OPERAND_OBJECT **Elements; 615 616 617 ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData); 618 619 620 /* Validate parameters */ 621 622 if ((SleepState > ACPI_S_STATES_MAX) || 623 !SleepTypeA || !SleepTypeB) 624 { 625 return_ACPI_STATUS (AE_BAD_PARAMETER); 626 } 627 628 /* Allocate the evaluation information block */ 629 630 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 631 if (!Info) 632 { 633 return_ACPI_STATUS (AE_NO_MEMORY); 634 } 635 636 /* 637 * Evaluate the \_Sx namespace object containing the register values 638 * for this state 639 */ 640 Info->RelativePathname = AcpiGbl_SleepStateNames[SleepState]; 641 642 Status = AcpiNsEvaluate (Info); 643 if (ACPI_FAILURE (Status)) 644 { 645 if (Status == AE_NOT_FOUND) 646 { 647 /* The _Sx states are optional, ignore NOT_FOUND */ 648 649 goto FinalCleanup; 650 } 651 652 goto WarningCleanup; 653 } 654 655 /* Must have a return object */ 656 657 if (!Info->ReturnObject) 658 { 659 ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]", 660 Info->RelativePathname)); 661 Status = AE_AML_NO_RETURN_VALUE; 662 goto WarningCleanup; 663 } 664 665 /* Return object must be of type Package */ 666 667 if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) 668 { 669 ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package")); 670 Status = AE_AML_OPERAND_TYPE; 671 goto ReturnValueCleanup; 672 } 673 674 /* 675 * Any warnings about the package length or the object types have 676 * already been issued by the predefined name module -- there is no 677 * need to repeat them here. 678 */ 679 Elements = Info->ReturnObject->Package.Elements; 680 switch (Info->ReturnObject->Package.Count) 681 { 682 case 0: 683 684 Status = AE_AML_PACKAGE_LIMIT; 685 break; 686 687 case 1: 688 689 if (Elements[0]->Common.Type != ACPI_TYPE_INTEGER) 690 { 691 Status = AE_AML_OPERAND_TYPE; 692 break; 693 } 694 695 /* A valid _Sx_ package with one integer */ 696 697 *SleepTypeA = (UINT8) Elements[0]->Integer.Value; 698 *SleepTypeB = (UINT8) (Elements[0]->Integer.Value >> 8); 699 break; 700 701 case 2: 702 default: 703 704 if ((Elements[0]->Common.Type != ACPI_TYPE_INTEGER) || 705 (Elements[1]->Common.Type != ACPI_TYPE_INTEGER)) 706 { 707 Status = AE_AML_OPERAND_TYPE; 708 break; 709 } 710 711 /* A valid _Sx_ package with two integers */ 712 713 *SleepTypeA = (UINT8) Elements[0]->Integer.Value; 714 *SleepTypeB = (UINT8) Elements[1]->Integer.Value; 715 break; 716 } 717 718 ReturnValueCleanup: 719 AcpiUtRemoveReference (Info->ReturnObject); 720 721 WarningCleanup: 722 if (ACPI_FAILURE (Status)) 723 { 724 ACPI_EXCEPTION ((AE_INFO, Status, 725 "While evaluating Sleep State [%s]", 726 Info->RelativePathname)); 727 } 728 729 FinalCleanup: 730 ACPI_FREE (Info); 731 return_ACPI_STATUS (Status); 732 } 733 734 ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData) 735