hwregs.c revision 129684
1 2/******************************************************************************* 3 * 4 * Module Name: hwregs - Read/write access functions for the various ACPI 5 * control and status registers. 6 * $Revision: 156 $ 7 * 8 ******************************************************************************/ 9 10/****************************************************************************** 11 * 12 * 1. Copyright Notice 13 * 14 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 15 * All rights reserved. 16 * 17 * 2. License 18 * 19 * 2.1. This is your license from Intel Corp. under its intellectual property 20 * rights. You may have additional license terms from the party that provided 21 * you this software, covering your right to use that party's intellectual 22 * property rights. 23 * 24 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 25 * copy of the source code appearing in this file ("Covered Code") an 26 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 27 * base code distributed originally by Intel ("Original Intel Code") to copy, 28 * make derivatives, distribute, use and display any portion of the Covered 29 * Code in any form, with the right to sublicense such rights; and 30 * 31 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 32 * license (with the right to sublicense), under only those claims of Intel 33 * patents that are infringed by the Original Intel Code, to make, use, sell, 34 * offer to sell, and import the Covered Code and derivative works thereof 35 * solely to the minimum extent necessary to exercise the above copyright 36 * license, and in no event shall the patent license extend to any additions 37 * to or modifications of the Original Intel Code. No other license or right 38 * is granted directly or by implication, estoppel or otherwise; 39 * 40 * The above copyright and patent license is granted only if the following 41 * conditions are met: 42 * 43 * 3. Conditions 44 * 45 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 46 * Redistribution of source code of any substantial portion of the Covered 47 * Code or modification with rights to further distribute source must include 48 * the above Copyright Notice, the above License, this list of Conditions, 49 * and the following Disclaimer and Export Compliance provision. In addition, 50 * Licensee must cause all Covered Code to which Licensee contributes to 51 * contain a file documenting the changes Licensee made to create that Covered 52 * Code and the date of any change. Licensee must include in that file the 53 * documentation of any changes made by any predecessor Licensee. Licensee 54 * must include a prominent statement that the modification is derived, 55 * directly or indirectly, from Original Intel Code. 56 * 57 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 58 * Redistribution of source code of any substantial portion of the Covered 59 * Code or modification without rights to further distribute source must 60 * include the following Disclaimer and Export Compliance provision in the 61 * documentation and/or other materials provided with distribution. In 62 * addition, Licensee may not authorize further sublicense of source of any 63 * portion of the Covered Code, and must include terms to the effect that the 64 * license from Licensee to its licensee is limited to the intellectual 65 * property embodied in the software Licensee provides to its licensee, and 66 * not to intellectual property embodied in modifications its licensee may 67 * make. 68 * 69 * 3.3. Redistribution of Executable. Redistribution in executable form of any 70 * substantial portion of the Covered Code or modification must reproduce the 71 * above Copyright Notice, and the following Disclaimer and Export Compliance 72 * provision in the documentation and/or other materials provided with the 73 * distribution. 74 * 75 * 3.4. Intel retains all right, title, and interest in and to the Original 76 * Intel Code. 77 * 78 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 79 * Intel shall be used in advertising or otherwise to promote the sale, use or 80 * other dealings in products derived from or relating to the Covered Code 81 * without prior written authorization from Intel. 82 * 83 * 4. Disclaimer and Export Compliance 84 * 85 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 86 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 87 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 88 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 89 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 90 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 91 * PARTICULAR PURPOSE. 92 * 93 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 94 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 95 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 96 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 97 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 98 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 99 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 100 * LIMITED REMEDY. 101 * 102 * 4.3. Licensee shall not export, either directly or indirectly, any of this 103 * software or system incorporating such software without first obtaining any 104 * required license or other approval from the U. S. Department of Commerce or 105 * any other agency or department of the United States Government. In the 106 * event Licensee exports any such software from the United States or 107 * re-exports any such software from a foreign destination, Licensee shall 108 * ensure that the distribution and export/re-export of the software is in 109 * compliance with all laws, regulations, orders, or other restrictions of the 110 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 111 * any of its subsidiaries will export/re-export any technical data, process, 112 * software, or service, directly or indirectly, to any country for which the 113 * United States government or any agency thereof requires an export license, 114 * other governmental approval, or letter of assurance, without first obtaining 115 * such license, approval or letter. 116 * 117 *****************************************************************************/ 118 119#define __HWREGS_C__ 120 121#include "acpi.h" 122#include "acnamesp.h" 123#include "acevents.h" 124 125#define _COMPONENT ACPI_HARDWARE 126 ACPI_MODULE_NAME ("hwregs") 127 128 129/******************************************************************************* 130 * 131 * FUNCTION: AcpiHwClearAcpiStatus 132 * 133 * PARAMETERS: Flags - Lock the hardware or not 134 * 135 * RETURN: none 136 * 137 * DESCRIPTION: Clears all fixed and general purpose status bits 138 * 139 ******************************************************************************/ 140 141ACPI_STATUS 142AcpiHwClearAcpiStatus ( 143 UINT32 Flags) 144{ 145 ACPI_STATUS Status; 146 147 148 ACPI_FUNCTION_TRACE ("HwClearAcpiStatus"); 149 150 151 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %04X\n", 152 ACPI_BITMASK_ALL_FIXED_STATUS, 153 (UINT16) ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm1aEvtBlk.Address))); 154 155 if (Flags & ACPI_MTX_LOCK) 156 { 157 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 158 if (ACPI_FAILURE (Status)) 159 { 160 return_ACPI_STATUS (Status); 161 } 162 } 163 164 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 165 ACPI_BITMASK_ALL_FIXED_STATUS); 166 if (ACPI_FAILURE (Status)) 167 { 168 goto UnlockAndExit; 169 } 170 171 /* Clear the fixed events */ 172 173 if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1bEvtBlk.Address)) 174 { 175 Status = AcpiHwLowLevelWrite (16, ACPI_BITMASK_ALL_FIXED_STATUS, 176 &AcpiGbl_FADT->XPm1bEvtBlk); 177 if (ACPI_FAILURE (Status)) 178 { 179 goto UnlockAndExit; 180 } 181 } 182 183 /* Clear the GPE Bits in all GPE registers in all GPE blocks */ 184 185 Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock); 186 187UnlockAndExit: 188 if (Flags & ACPI_MTX_LOCK) 189 { 190 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 191 } 192 return_ACPI_STATUS (Status); 193} 194 195 196/******************************************************************************* 197 * 198 * FUNCTION: AcpiGetSleepTypeData 199 * 200 * PARAMETERS: SleepState - Numeric sleep state 201 * *SleepTypeA - Where SLP_TYPa is returned 202 * *SleepTypeB - Where SLP_TYPb is returned 203 * 204 * RETURN: Status - ACPI status 205 * 206 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep 207 * state. 208 * 209 ******************************************************************************/ 210 211ACPI_STATUS 212AcpiGetSleepTypeData ( 213 UINT8 SleepState, 214 UINT8 *SleepTypeA, 215 UINT8 *SleepTypeB) 216{ 217 ACPI_STATUS Status = AE_OK; 218 ACPI_PARAMETER_INFO Info; 219 220 221 ACPI_FUNCTION_TRACE ("AcpiGetSleepTypeData"); 222 223 224 /* 225 * Validate parameters 226 */ 227 if ((SleepState > ACPI_S_STATES_MAX) || 228 !SleepTypeA || !SleepTypeB) 229 { 230 return_ACPI_STATUS (AE_BAD_PARAMETER); 231 } 232 233 /* 234 * Evaluate the namespace object containing the values for this state 235 */ 236 Info.Parameters = NULL; 237 Status = AcpiNsEvaluateByName ((char *) AcpiGbl_SleepStateNames[SleepState], 238 &Info); 239 if (ACPI_FAILURE (Status)) 240 { 241 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s while evaluating SleepState [%s]\n", 242 AcpiFormatException (Status), AcpiGbl_SleepStateNames[SleepState])); 243 244 return_ACPI_STATUS (Status); 245 } 246 247 /* Must have a return object */ 248 249 if (!Info.ReturnObject) 250 { 251 ACPI_REPORT_ERROR (("Missing Sleep State object\n")); 252 Status = AE_NOT_EXIST; 253 } 254 255 /* It must be of type Package */ 256 257 else if (ACPI_GET_OBJECT_TYPE (Info.ReturnObject) != ACPI_TYPE_PACKAGE) 258 { 259 ACPI_REPORT_ERROR (("Sleep State object not a Package\n")); 260 Status = AE_AML_OPERAND_TYPE; 261 } 262 263 /* The package must have at least two elements */ 264 265 else if (Info.ReturnObject->Package.Count < 2) 266 { 267 ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n")); 268 Status = AE_AML_NO_OPERAND; 269 } 270 271 /* The first two elements must both be of type Integer */ 272 273 else if ((ACPI_GET_OBJECT_TYPE (Info.ReturnObject->Package.Elements[0]) != ACPI_TYPE_INTEGER) || 274 (ACPI_GET_OBJECT_TYPE (Info.ReturnObject->Package.Elements[1]) != ACPI_TYPE_INTEGER)) 275 { 276 ACPI_REPORT_ERROR (("Sleep State package elements are not both Integers (%s, %s)\n", 277 AcpiUtGetObjectTypeName (Info.ReturnObject->Package.Elements[0]), 278 AcpiUtGetObjectTypeName (Info.ReturnObject->Package.Elements[1]))); 279 Status = AE_AML_OPERAND_TYPE; 280 } 281 else 282 { 283 /* 284 * Valid _Sx_ package size, type, and value 285 */ 286 *SleepTypeA = (UINT8) (Info.ReturnObject->Package.Elements[0])->Integer.Value; 287 *SleepTypeB = (UINT8) (Info.ReturnObject->Package.Elements[1])->Integer.Value; 288 } 289 290 if (ACPI_FAILURE (Status)) 291 { 292 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 293 "While evaluating SleepState [%s], bad Sleep object %p type %s\n", 294 AcpiGbl_SleepStateNames[SleepState], Info.ReturnObject, 295 AcpiUtGetObjectTypeName (Info.ReturnObject))); 296 } 297 298 AcpiUtRemoveReference (Info.ReturnObject); 299 return_ACPI_STATUS (Status); 300} 301 302 303/******************************************************************************* 304 * 305 * FUNCTION: AcpiHwGetRegisterBitMask 306 * 307 * PARAMETERS: RegisterId - Index of ACPI Register to access 308 * 309 * RETURN: The bit mask to be used when accessing the register 310 * 311 * DESCRIPTION: Map RegisterId into a register bit mask. 312 * 313 ******************************************************************************/ 314 315ACPI_BIT_REGISTER_INFO * 316AcpiHwGetBitRegisterInfo ( 317 UINT32 RegisterId) 318{ 319 ACPI_FUNCTION_NAME ("HwGetBitRegisterInfo"); 320 321 322 if (RegisterId > ACPI_BITREG_MAX) 323 { 324 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid BitRegister ID: %X\n", RegisterId)); 325 return (NULL); 326 } 327 328 return (&AcpiGbl_BitRegisterInfo[RegisterId]); 329} 330 331 332/******************************************************************************* 333 * 334 * FUNCTION: AcpiGetRegister 335 * 336 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 337 * ReturnValue - Value that was read from the register 338 * Flags - Lock the hardware or not 339 * 340 * RETURN: Value is read from specified Register. Value returned is 341 * normalized to bit0 (is shifted all the way right) 342 * 343 * DESCRIPTION: ACPI BitRegister read function. 344 * 345 ******************************************************************************/ 346 347ACPI_STATUS 348AcpiGetRegister ( 349 UINT32 RegisterId, 350 UINT32 *ReturnValue, 351 UINT32 Flags) 352{ 353 UINT32 RegisterValue = 0; 354 ACPI_BIT_REGISTER_INFO *BitRegInfo; 355 ACPI_STATUS Status; 356 357 358 ACPI_FUNCTION_TRACE ("AcpiGetRegister"); 359 360 361 /* Get the info structure corresponding to the requested ACPI Register */ 362 363 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 364 if (!BitRegInfo) 365 { 366 return_ACPI_STATUS (AE_BAD_PARAMETER); 367 } 368 369 if (Flags & ACPI_MTX_LOCK) 370 { 371 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 372 if (ACPI_FAILURE (Status)) 373 { 374 return_ACPI_STATUS (Status); 375 } 376 } 377 378 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 379 BitRegInfo->ParentRegister, &RegisterValue); 380 381 if (Flags & ACPI_MTX_LOCK) 382 { 383 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 384 } 385 386 if (ACPI_SUCCESS (Status)) 387 { 388 /* Normalize the value that was read */ 389 390 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) 391 >> BitRegInfo->BitPosition); 392 393 *ReturnValue = RegisterValue; 394 395 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %8.8X register %X\n", 396 RegisterValue, BitRegInfo->ParentRegister)); 397 } 398 399 return_ACPI_STATUS (Status); 400} 401 402 403/******************************************************************************* 404 * 405 * FUNCTION: AcpiSetRegister 406 * 407 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 408 * Value - (only used on write) value to write to the 409 * Register, NOT pre-normalized to the bit pos. 410 * Flags - Lock the hardware or not 411 * 412 * RETURN: None 413 * 414 * DESCRIPTION: ACPI Bit Register write function. 415 * 416 ******************************************************************************/ 417 418ACPI_STATUS 419AcpiSetRegister ( 420 UINT32 RegisterId, 421 UINT32 Value, 422 UINT32 Flags) 423{ 424 UINT32 RegisterValue = 0; 425 ACPI_BIT_REGISTER_INFO *BitRegInfo; 426 ACPI_STATUS Status; 427 428 429 ACPI_FUNCTION_TRACE_U32 ("AcpiSetRegister", RegisterId); 430 431 432 /* Get the info structure corresponding to the requested ACPI Register */ 433 434 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 435 if (!BitRegInfo) 436 { 437 ACPI_REPORT_ERROR (("Bad ACPI HW RegisterId: %X\n", RegisterId)); 438 return_ACPI_STATUS (AE_BAD_PARAMETER); 439 } 440 441 if (Flags & ACPI_MTX_LOCK) 442 { 443 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 444 if (ACPI_FAILURE (Status)) 445 { 446 return_ACPI_STATUS (Status); 447 } 448 } 449 450 /* Always do a register read first so we can insert the new bits */ 451 452 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 453 BitRegInfo->ParentRegister, &RegisterValue); 454 if (ACPI_FAILURE (Status)) 455 { 456 goto UnlockAndExit; 457 } 458 459 /* 460 * Decode the Register ID 461 * Register ID = [Register block ID] | [bit ID] 462 * 463 * Check bit ID to fine locate Register offset. 464 * Check Mask to determine Register offset, and then read-write. 465 */ 466 switch (BitRegInfo->ParentRegister) 467 { 468 case ACPI_REGISTER_PM1_STATUS: 469 470 /* 471 * Status Registers are different from the rest. Clear by 472 * writing 1, and writing 0 has no effect. So, the only relevant 473 * information is the single bit we're interested in, all others should 474 * be written as 0 so they will be left unchanged. 475 */ 476 Value = ACPI_REGISTER_PREPARE_BITS (Value, 477 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 478 if (Value) 479 { 480 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 481 ACPI_REGISTER_PM1_STATUS, (UINT16) Value); 482 RegisterValue = 0; 483 } 484 break; 485 486 487 case ACPI_REGISTER_PM1_ENABLE: 488 489 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 490 BitRegInfo->AccessBitMask, Value); 491 492 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 493 ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue); 494 break; 495 496 497 case ACPI_REGISTER_PM1_CONTROL: 498 499 /* 500 * Write the PM1 Control register. 501 * Note that at this level, the fact that there are actually TWO 502 * registers (A and B - and B may not exist) is abstracted. 503 */ 504 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue)); 505 506 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 507 BitRegInfo->AccessBitMask, Value); 508 509 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 510 ACPI_REGISTER_PM1_CONTROL, (UINT16) RegisterValue); 511 break; 512 513 514 case ACPI_REGISTER_PM2_CONTROL: 515 516 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 517 ACPI_REGISTER_PM2_CONTROL, &RegisterValue); 518 if (ACPI_FAILURE (Status)) 519 { 520 goto UnlockAndExit; 521 } 522 523 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n", 524 RegisterValue, 525 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)))); 526 527 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 528 BitRegInfo->AccessBitMask, Value); 529 530 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n", 531 RegisterValue, 532 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)))); 533 534 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 535 ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue)); 536 break; 537 538 539 default: 540 break; 541 } 542 543 544UnlockAndExit: 545 546 if (Flags & ACPI_MTX_LOCK) 547 { 548 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 549 } 550 551 /* Normalize the value that was read */ 552 553 ACPI_DEBUG_EXEC (RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition)); 554 555 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Set bits: %8.8X actual %8.8X register %X\n", 556 Value, RegisterValue, BitRegInfo->ParentRegister)); 557 return_ACPI_STATUS (Status); 558} 559 560 561/****************************************************************************** 562 * 563 * FUNCTION: AcpiHwRegisterRead 564 * 565 * PARAMETERS: UseLock - Mutex hw access. 566 * RegisterId - RegisterID + Offset. 567 * 568 * RETURN: Value read or written. 569 * 570 * DESCRIPTION: Acpi register read function. Registers are read at the 571 * given offset. 572 * 573 ******************************************************************************/ 574 575ACPI_STATUS 576AcpiHwRegisterRead ( 577 BOOLEAN UseLock, 578 UINT32 RegisterId, 579 UINT32 *ReturnValue) 580{ 581 UINT32 Value1 = 0; 582 UINT32 Value2 = 0; 583 ACPI_STATUS Status; 584 585 586 ACPI_FUNCTION_TRACE ("HwRegisterRead"); 587 588 589 if (ACPI_MTX_LOCK == UseLock) 590 { 591 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 592 if (ACPI_FAILURE (Status)) 593 { 594 return_ACPI_STATUS (Status); 595 } 596 } 597 598 switch (RegisterId) 599 { 600 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 601 602 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aEvtBlk); 603 if (ACPI_FAILURE (Status)) 604 { 605 goto UnlockAndExit; 606 } 607 608 /* PM1B is optional */ 609 610 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bEvtBlk); 611 Value1 |= Value2; 612 break; 613 614 615 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ 616 617 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_XPm1aEnable); 618 if (ACPI_FAILURE (Status)) 619 { 620 goto UnlockAndExit; 621 } 622 623 /* PM1B is optional */ 624 625 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_XPm1bEnable); 626 Value1 |= Value2; 627 break; 628 629 630 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 631 632 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aCntBlk); 633 if (ACPI_FAILURE (Status)) 634 { 635 goto UnlockAndExit; 636 } 637 638 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bCntBlk); 639 Value1 |= Value2; 640 break; 641 642 643 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 644 645 Status = AcpiHwLowLevelRead (8, &Value1, &AcpiGbl_FADT->XPm2CntBlk); 646 break; 647 648 649 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 650 651 Status = AcpiHwLowLevelRead (32, &Value1, &AcpiGbl_FADT->XPmTmrBlk); 652 break; 653 654 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 655 656 Status = AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value1, 8); 657 break; 658 659 default: 660 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Register ID: %X\n", RegisterId)); 661 Status = AE_BAD_PARAMETER; 662 break; 663 } 664 665UnlockAndExit: 666 if (ACPI_MTX_LOCK == UseLock) 667 { 668 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 669 } 670 671 if (ACPI_SUCCESS (Status)) 672 { 673 *ReturnValue = Value1; 674 } 675 676 return_ACPI_STATUS (Status); 677} 678 679 680/****************************************************************************** 681 * 682 * FUNCTION: AcpiHwRegisterWrite 683 * 684 * PARAMETERS: UseLock - Mutex hw access. 685 * RegisterId - RegisterID + Offset. 686 * 687 * RETURN: Value read or written. 688 * 689 * DESCRIPTION: Acpi register Write function. Registers are written at the 690 * given offset. 691 * 692 ******************************************************************************/ 693 694ACPI_STATUS 695AcpiHwRegisterWrite ( 696 BOOLEAN UseLock, 697 UINT32 RegisterId, 698 UINT32 Value) 699{ 700 ACPI_STATUS Status; 701 702 703 ACPI_FUNCTION_TRACE ("HwRegisterWrite"); 704 705 706 if (ACPI_MTX_LOCK == UseLock) 707 { 708 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 709 if (ACPI_FAILURE (Status)) 710 { 711 return_ACPI_STATUS (Status); 712 } 713 } 714 715 switch (RegisterId) 716 { 717 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 718 719 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk); 720 if (ACPI_FAILURE (Status)) 721 { 722 goto UnlockAndExit; 723 } 724 725 /* PM1B is optional */ 726 727 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk); 728 break; 729 730 731 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 732 733 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1aEnable); 734 if (ACPI_FAILURE (Status)) 735 { 736 goto UnlockAndExit; 737 } 738 739 /* PM1B is optional */ 740 741 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1bEnable); 742 break; 743 744 745 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 746 747 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk); 748 if (ACPI_FAILURE (Status)) 749 { 750 goto UnlockAndExit; 751 } 752 753 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk); 754 break; 755 756 757 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ 758 759 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk); 760 break; 761 762 763 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ 764 765 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk); 766 break; 767 768 769 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 770 771 Status = AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk); 772 break; 773 774 775 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 776 777 Status = AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk); 778 break; 779 780 781 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 782 783 /* SMI_CMD is currently always in IO space */ 784 785 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, Value, 8); 786 break; 787 788 789 default: 790 Status = AE_BAD_PARAMETER; 791 break; 792 } 793 794UnlockAndExit: 795 if (ACPI_MTX_LOCK == UseLock) 796 { 797 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 798 } 799 800 return_ACPI_STATUS (Status); 801} 802 803 804/****************************************************************************** 805 * 806 * FUNCTION: AcpiHwLowLevelRead 807 * 808 * PARAMETERS: Width - 8, 16, or 32 809 * Value - Where the value is returned 810 * Register - GAS register structure 811 * 812 * RETURN: Status 813 * 814 * DESCRIPTION: Read from either memory, IO, or PCI config space. 815 * 816 ******************************************************************************/ 817 818ACPI_STATUS 819AcpiHwLowLevelRead ( 820 UINT32 Width, 821 UINT32 *Value, 822 ACPI_GENERIC_ADDRESS *Reg) 823{ 824 ACPI_PCI_ID PciId; 825 UINT16 PciRegister; 826 ACPI_STATUS Status; 827 828 829 ACPI_FUNCTION_NAME ("HwLowLevelRead"); 830 831 832 /* 833 * Must have a valid pointer to a GAS structure, and 834 * a non-zero address within. However, don't return an error 835 * because the PM1A/B code must not fail if B isn't present. 836 */ 837 if ((!Reg) || 838 (!ACPI_VALID_ADDRESS (Reg->Address))) 839 { 840 return (AE_OK); 841 } 842 *Value = 0; 843 844 /* 845 * Three address spaces supported: 846 * Memory, IO, or PCI_Config. 847 */ 848 switch (Reg->AddressSpaceId) 849 { 850 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 851 852 Status = AcpiOsReadMemory ( 853 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 854 Value, Width); 855 break; 856 857 858 case ACPI_ADR_SPACE_SYSTEM_IO: 859 860 Status = AcpiOsReadPort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 861 Value, Width); 862 break; 863 864 865 case ACPI_ADR_SPACE_PCI_CONFIG: 866 867 PciId.Segment = 0; 868 PciId.Bus = 0; 869 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 870 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 871 PciRegister = (UINT16) ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)); 872 873 Status = AcpiOsReadPciConfiguration (&PciId, PciRegister, 874 Value, Width); 875 break; 876 877 878 default: 879 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 880 "Unsupported address space: %X\n", Reg->AddressSpaceId)); 881 return (AE_BAD_PARAMETER); 882 } 883 884 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", 885 *Value, Width, 886 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (Reg->Address)), 887 AcpiUtGetRegionName (Reg->AddressSpaceId))); 888 889 return (Status); 890} 891 892 893/****************************************************************************** 894 * 895 * FUNCTION: AcpiHwLowLevelWrite 896 * 897 * PARAMETERS: Width - 8, 16, or 32 898 * Value - To be written 899 * Register - GAS register structure 900 * 901 * RETURN: Status 902 * 903 * DESCRIPTION: Write to either memory, IO, or PCI config space. 904 * 905 ******************************************************************************/ 906 907ACPI_STATUS 908AcpiHwLowLevelWrite ( 909 UINT32 Width, 910 UINT32 Value, 911 ACPI_GENERIC_ADDRESS *Reg) 912{ 913 ACPI_PCI_ID PciId; 914 UINT16 PciRegister; 915 ACPI_STATUS Status; 916 917 918 ACPI_FUNCTION_NAME ("HwLowLevelWrite"); 919 920 921 /* 922 * Must have a valid pointer to a GAS structure, and 923 * a non-zero address within. However, don't return an error 924 * because the PM1A/B code must not fail if B isn't present. 925 */ 926 if ((!Reg) || 927 (!ACPI_VALID_ADDRESS (Reg->Address))) 928 { 929 return (AE_OK); 930 } 931 932 /* 933 * Three address spaces supported: 934 * Memory, IO, or PCI_Config. 935 */ 936 switch (Reg->AddressSpaceId) 937 { 938 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 939 940 Status = AcpiOsWriteMemory ( 941 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 942 Value, Width); 943 break; 944 945 946 case ACPI_ADR_SPACE_SYSTEM_IO: 947 948 Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 949 Value, Width); 950 break; 951 952 953 case ACPI_ADR_SPACE_PCI_CONFIG: 954 955 PciId.Segment = 0; 956 PciId.Bus = 0; 957 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 958 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 959 PciRegister = (UINT16) ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)); 960 961 Status = AcpiOsWritePciConfiguration (&PciId, PciRegister, 962 (ACPI_INTEGER) Value, Width); 963 break; 964 965 966 default: 967 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 968 "Unsupported address space: %X\n", Reg->AddressSpaceId)); 969 return (AE_BAD_PARAMETER); 970 } 971 972 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", 973 Value, Width, 974 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (Reg->Address)), 975 AcpiUtGetRegionName (Reg->AddressSpaceId))); 976 977 return (Status); 978} 979