hwregs.c revision 117521
1 2/******************************************************************************* 3 * 4 * Module Name: hwregs - Read/write access functions for the various ACPI 5 * control and status registers. 6 * $Revision: 149 $ 7 * 8 ******************************************************************************/ 9 10/****************************************************************************** 11 * 12 * 1. Copyright Notice 13 * 14 * Some or all of this work - Copyright (c) 1999 - 2003, 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_OPERAND_OBJECT *ObjDesc; 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 Status = AcpiNsEvaluateByName ((char *) AcpiGbl_DbSleepStates[SleepState], 237 NULL, &ObjDesc); 238 if (ACPI_FAILURE (Status)) 239 { 240 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s while evaluating SleepState [%s]\n", 241 AcpiFormatException (Status), AcpiGbl_DbSleepStates[SleepState])); 242 243 return_ACPI_STATUS (Status); 244 } 245 246 /* Must have a return object */ 247 248 if (!ObjDesc) 249 { 250 ACPI_REPORT_ERROR (("Missing Sleep State object\n")); 251 Status = AE_NOT_EXIST; 252 } 253 254 /* It must be of type Package */ 255 256 else if (ACPI_GET_OBJECT_TYPE (ObjDesc) != ACPI_TYPE_PACKAGE) 257 { 258 ACPI_REPORT_ERROR (("Sleep State object not a Package\n")); 259 Status = AE_AML_OPERAND_TYPE; 260 } 261 262 /* The package must have at least two elements */ 263 264 else if (ObjDesc->Package.Count < 2) 265 { 266 ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n")); 267 Status = AE_AML_NO_OPERAND; 268 } 269 270 /* The first two elements must both be of type Integer */ 271 272 else if ((ACPI_GET_OBJECT_TYPE (ObjDesc->Package.Elements[0]) != ACPI_TYPE_INTEGER) || 273 (ACPI_GET_OBJECT_TYPE (ObjDesc->Package.Elements[1]) != ACPI_TYPE_INTEGER)) 274 { 275 ACPI_REPORT_ERROR (("Sleep State package elements are not both Integers (%s, %s)\n", 276 AcpiUtGetObjectTypeName (ObjDesc->Package.Elements[0]), 277 AcpiUtGetObjectTypeName (ObjDesc->Package.Elements[1]))); 278 Status = AE_AML_OPERAND_TYPE; 279 } 280 else 281 { 282 /* 283 * Valid _Sx_ package size, type, and value 284 */ 285 *SleepTypeA = (UINT8) (ObjDesc->Package.Elements[0])->Integer.Value; 286 *SleepTypeB = (UINT8) (ObjDesc->Package.Elements[1])->Integer.Value; 287 } 288 289 if (ACPI_FAILURE (Status)) 290 { 291 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While evaluating SleepState [%s], bad Sleep object %p type %s\n", 292 AcpiGbl_DbSleepStates[SleepState], ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 293 } 294 295 AcpiUtRemoveReference (ObjDesc); 296 return_ACPI_STATUS (Status); 297} 298 299 300/******************************************************************************* 301 * 302 * FUNCTION: AcpiHwGetRegisterBitMask 303 * 304 * PARAMETERS: RegisterId - Index of ACPI Register to access 305 * 306 * RETURN: The bit mask to be used when accessing the register 307 * 308 * DESCRIPTION: Map RegisterId into a register bit mask. 309 * 310 ******************************************************************************/ 311 312ACPI_BIT_REGISTER_INFO * 313AcpiHwGetBitRegisterInfo ( 314 UINT32 RegisterId) 315{ 316 ACPI_FUNCTION_NAME ("HwGetBitRegisterInfo"); 317 318 319 if (RegisterId > ACPI_BITREG_MAX) 320 { 321 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid BitRegister ID: %X\n", RegisterId)); 322 return (NULL); 323 } 324 325 return (&AcpiGbl_BitRegisterInfo[RegisterId]); 326} 327 328 329/******************************************************************************* 330 * 331 * FUNCTION: AcpiGetRegister 332 * 333 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 334 * ReturnValue - Value that was read from the register 335 * Flags - Lock the hardware or not 336 * 337 * RETURN: Value is read from specified Register. Value returned is 338 * normalized to bit0 (is shifted all the way right) 339 * 340 * DESCRIPTION: ACPI BitRegister read function. 341 * 342 ******************************************************************************/ 343 344ACPI_STATUS 345AcpiGetRegister ( 346 UINT32 RegisterId, 347 UINT32 *ReturnValue, 348 UINT32 Flags) 349{ 350 UINT32 RegisterValue = 0; 351 ACPI_BIT_REGISTER_INFO *BitRegInfo; 352 ACPI_STATUS Status; 353 354 355 ACPI_FUNCTION_TRACE ("AcpiGetRegister"); 356 357 358 /* Get the info structure corresponding to the requested ACPI Register */ 359 360 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 361 if (!BitRegInfo) 362 { 363 return_ACPI_STATUS (AE_BAD_PARAMETER); 364 } 365 366 if (Flags & ACPI_MTX_LOCK) 367 { 368 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 369 if (ACPI_FAILURE (Status)) 370 { 371 return_ACPI_STATUS (Status); 372 } 373 } 374 375 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 376 BitRegInfo->ParentRegister, &RegisterValue); 377 378 if (Flags & ACPI_MTX_LOCK) 379 { 380 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 381 } 382 383 if (ACPI_SUCCESS (Status)) 384 { 385 /* Normalize the value that was read */ 386 387 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) 388 >> BitRegInfo->BitPosition); 389 390 *ReturnValue = RegisterValue; 391 392 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %8.8X register %X\n", 393 RegisterValue, BitRegInfo->ParentRegister)); 394 } 395 396 return_ACPI_STATUS (Status); 397} 398 399 400/******************************************************************************* 401 * 402 * FUNCTION: AcpiSetRegister 403 * 404 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 405 * Value - (only used on write) value to write to the 406 * Register, NOT pre-normalized to the bit pos. 407 * Flags - Lock the hardware or not 408 * 409 * RETURN: None 410 * 411 * DESCRIPTION: ACPI Bit Register write function. 412 * 413 ******************************************************************************/ 414 415ACPI_STATUS 416AcpiSetRegister ( 417 UINT32 RegisterId, 418 UINT32 Value, 419 UINT32 Flags) 420{ 421 UINT32 RegisterValue = 0; 422 ACPI_BIT_REGISTER_INFO *BitRegInfo; 423 ACPI_STATUS Status; 424 425 426 ACPI_FUNCTION_TRACE_U32 ("AcpiSetRegister", RegisterId); 427 428 429 /* Get the info structure corresponding to the requested ACPI Register */ 430 431 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 432 if (!BitRegInfo) 433 { 434 ACPI_REPORT_ERROR (("Bad ACPI HW RegisterId: %X\n", RegisterId)); 435 return_ACPI_STATUS (AE_BAD_PARAMETER); 436 } 437 438 if (Flags & ACPI_MTX_LOCK) 439 { 440 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 441 if (ACPI_FAILURE (Status)) 442 { 443 return_ACPI_STATUS (Status); 444 } 445 } 446 447 /* Always do a register read first so we can insert the new bits */ 448 449 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 450 BitRegInfo->ParentRegister, &RegisterValue); 451 if (ACPI_FAILURE (Status)) 452 { 453 goto UnlockAndExit; 454 } 455 456 /* 457 * Decode the Register ID 458 * Register id = Register block id | bit id 459 * 460 * Check bit id to fine locate Register offset. 461 * Check Mask to determine Register offset, and then read-write. 462 */ 463 switch (BitRegInfo->ParentRegister) 464 { 465 case ACPI_REGISTER_PM1_STATUS: 466 467 /* 468 * Status Registers are different from the rest. Clear by 469 * writing 1, writing 0 has no effect. So, the only relevant 470 * information is the single bit we're interested in, all others should 471 * be written as 0 so they will be left unchanged 472 */ 473 Value = ACPI_REGISTER_PREPARE_BITS (Value, 474 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 475 if (Value) 476 { 477 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 478 ACPI_REGISTER_PM1_STATUS, (UINT16) Value); 479 RegisterValue = 0; 480 } 481 break; 482 483 484 case ACPI_REGISTER_PM1_ENABLE: 485 486 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 487 BitRegInfo->AccessBitMask, Value); 488 489 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 490 ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue); 491 break; 492 493 494 case ACPI_REGISTER_PM1_CONTROL: 495 496 /* 497 * Read the PM1 Control register. 498 * Note that at this level, the fact that there are actually TWO 499 * registers (A and B - and that B may not exist) is abstracted. 500 */ 501 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue)); 502 503 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 504 BitRegInfo->AccessBitMask, Value); 505 506 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, RegisterId, 507 (UINT16) RegisterValue); 508 break; 509 510 511 case ACPI_REGISTER_PM2_CONTROL: 512 513 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 514 ACPI_REGISTER_PM2_CONTROL, &RegisterValue); 515 if (ACPI_FAILURE (Status)) 516 { 517 goto UnlockAndExit; 518 } 519 520 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n", 521 RegisterValue, 522 ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)), 523 ACPI_LODWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)))); 524 525 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 526 BitRegInfo->AccessBitMask, Value); 527 528 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n", 529 RegisterValue, 530 ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)), 531 ACPI_LODWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)))); 532 533 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 534 ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue)); 535 break; 536 537 538 default: 539 break; 540 } 541 542 543UnlockAndExit: 544 545 if (Flags & ACPI_MTX_LOCK) 546 { 547 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 548 } 549 550 /* Normalize the value that was read */ 551 552 ACPI_DEBUG_EXEC (RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition)); 553 554 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Set bits: %8.8X actual %8.8X register %X\n", 555 Value, RegisterValue, BitRegInfo->ParentRegister)); 556 return_ACPI_STATUS (Status); 557} 558 559 560/****************************************************************************** 561 * 562 * FUNCTION: AcpiHwRegisterRead 563 * 564 * PARAMETERS: UseLock - Mutex hw access. 565 * RegisterId - RegisterID + Offset. 566 * 567 * RETURN: Value read or written. 568 * 569 * DESCRIPTION: Acpi register read function. Registers are read at the 570 * given offset. 571 * 572 ******************************************************************************/ 573 574ACPI_STATUS 575AcpiHwRegisterRead ( 576 BOOLEAN UseLock, 577 UINT32 RegisterId, 578 UINT32 *ReturnValue) 579{ 580 UINT32 Value1 = 0; 581 UINT32 Value2 = 0; 582 ACPI_STATUS Status; 583 584 585 ACPI_FUNCTION_TRACE ("HwRegisterRead"); 586 587 588 if (ACPI_MTX_LOCK == UseLock) 589 { 590 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 591 if (ACPI_FAILURE (Status)) 592 { 593 return_ACPI_STATUS (Status); 594 } 595 } 596 597 switch (RegisterId) 598 { 599 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 600 601 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aEvtBlk); 602 if (ACPI_FAILURE (Status)) 603 { 604 goto UnlockAndExit; 605 } 606 607 /* PM1B is optional */ 608 609 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bEvtBlk); 610 Value1 |= Value2; 611 break; 612 613 614 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ 615 616 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_XPm1aEnable); 617 if (ACPI_FAILURE (Status)) 618 { 619 goto UnlockAndExit; 620 } 621 622 /* PM1B is optional */ 623 624 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_XPm1bEnable); 625 Value1 |= Value2; 626 break; 627 628 629 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 630 631 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aCntBlk); 632 if (ACPI_FAILURE (Status)) 633 { 634 goto UnlockAndExit; 635 } 636 637 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bCntBlk); 638 Value1 |= Value2; 639 break; 640 641 642 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 643 644 Status = AcpiHwLowLevelRead (8, &Value1, &AcpiGbl_FADT->XPm2CntBlk); 645 break; 646 647 648 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 649 650 Status = AcpiHwLowLevelRead (32, &Value1, &AcpiGbl_FADT->XPmTmrBlk); 651 break; 652 653 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 654 655 Status = AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value1, 8); 656 break; 657 658 default: 659 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Register ID: %X\n", RegisterId)); 660 Status = AE_BAD_PARAMETER; 661 break; 662 } 663 664UnlockAndExit: 665 if (ACPI_MTX_LOCK == UseLock) 666 { 667 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 668 } 669 670 if (ACPI_SUCCESS (Status)) 671 { 672 *ReturnValue = Value1; 673 } 674 675 return_ACPI_STATUS (Status); 676} 677 678 679/****************************************************************************** 680 * 681 * FUNCTION: AcpiHwRegisterWrite 682 * 683 * PARAMETERS: UseLock - Mutex hw access. 684 * RegisterId - RegisterID + Offset. 685 * 686 * RETURN: Value read or written. 687 * 688 * DESCRIPTION: Acpi register Write function. Registers are written at the 689 * given offset. 690 * 691 ******************************************************************************/ 692 693ACPI_STATUS 694AcpiHwRegisterWrite ( 695 BOOLEAN UseLock, 696 UINT32 RegisterId, 697 UINT32 Value) 698{ 699 ACPI_STATUS Status; 700 701 702 ACPI_FUNCTION_TRACE ("HwRegisterWrite"); 703 704 705 if (ACPI_MTX_LOCK == UseLock) 706 { 707 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 708 if (ACPI_FAILURE (Status)) 709 { 710 return_ACPI_STATUS (Status); 711 } 712 } 713 714 switch (RegisterId) 715 { 716 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 717 718 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk); 719 if (ACPI_FAILURE (Status)) 720 { 721 goto UnlockAndExit; 722 } 723 724 /* PM1B is optional */ 725 726 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk); 727 break; 728 729 730 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 731 732 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1aEnable); 733 if (ACPI_FAILURE (Status)) 734 { 735 goto UnlockAndExit; 736 } 737 738 /* PM1B is optional */ 739 740 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1bEnable); 741 break; 742 743 744 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 745 746 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk); 747 if (ACPI_FAILURE (Status)) 748 { 749 goto UnlockAndExit; 750 } 751 752 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk); 753 break; 754 755 756 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ 757 758 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk); 759 break; 760 761 762 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ 763 764 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk); 765 break; 766 767 768 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 769 770 Status = AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk); 771 break; 772 773 774 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 775 776 Status = AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk); 777 break; 778 779 780 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 781 782 /* SMI_CMD is currently always in IO space */ 783 784 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, Value, 8); 785 break; 786 787 788 default: 789 Status = AE_BAD_PARAMETER; 790 break; 791 } 792 793UnlockAndExit: 794 if (ACPI_MTX_LOCK == UseLock) 795 { 796 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 797 } 798 799 return_ACPI_STATUS (Status); 800} 801 802 803/****************************************************************************** 804 * 805 * FUNCTION: AcpiHwLowLevelRead 806 * 807 * PARAMETERS: Width - 8, 16, or 32 808 * Value - Where the value is returned 809 * Register - GAS register structure 810 * 811 * RETURN: Status 812 * 813 * DESCRIPTION: Read from either memory, IO, or PCI config space. 814 * 815 ******************************************************************************/ 816 817ACPI_STATUS 818AcpiHwLowLevelRead ( 819 UINT32 Width, 820 UINT32 *Value, 821 ACPI_GENERIC_ADDRESS *Reg) 822{ 823 ACPI_PCI_ID PciId; 824 UINT16 PciRegister; 825 ACPI_STATUS Status; 826 827 828 ACPI_FUNCTION_NAME ("HwLowLevelRead"); 829 830 831 /* 832 * Must have a valid pointer to a GAS structure, and 833 * a non-zero address within. However, don't return an error 834 * because the PM1A/B code must not fail if B isn't present. 835 */ 836 if ((!Reg) || 837 (!ACPI_VALID_ADDRESS (Reg->Address))) 838 { 839 return (AE_OK); 840 } 841 *Value = 0; 842 843 /* 844 * Three address spaces supported: 845 * Memory, Io, or PCI config. 846 */ 847 switch (Reg->AddressSpaceId) 848 { 849 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 850 851 Status = AcpiOsReadMemory ( 852 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 853 Value, Width); 854 break; 855 856 857 case ACPI_ADR_SPACE_SYSTEM_IO: 858 859 Status = AcpiOsReadPort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 860 Value, Width); 861 break; 862 863 864 case ACPI_ADR_SPACE_PCI_CONFIG: 865 866 PciId.Segment = 0; 867 PciId.Bus = 0; 868 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 869 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 870 PciRegister = (UINT16) ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)); 871 872 Status = AcpiOsReadPciConfiguration (&PciId, PciRegister, 873 Value, Width); 874 break; 875 876 877 default: 878 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 879 "Unsupported address space: %X\n", Reg->AddressSpaceId)); 880 return (AE_BAD_PARAMETER); 881 } 882 883 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", 884 *Value, Width, 885 ACPI_HIDWORD (ACPI_GET_ADDRESS (Reg->Address)), 886 ACPI_LODWORD (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 * Three address spaces supported: 933 * Memory, Io, or PCI config. 934 */ 935 switch (Reg->AddressSpaceId) 936 { 937 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 938 939 Status = AcpiOsWriteMemory ( 940 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 941 Value, Width); 942 break; 943 944 945 case ACPI_ADR_SPACE_SYSTEM_IO: 946 947 Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Reg->Address), 948 Value, Width); 949 break; 950 951 952 case ACPI_ADR_SPACE_PCI_CONFIG: 953 954 PciId.Segment = 0; 955 PciId.Bus = 0; 956 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 957 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 958 PciRegister = (UINT16) ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)); 959 960 Status = AcpiOsWritePciConfiguration (&PciId, PciRegister, 961 (ACPI_INTEGER) Value, Width); 962 break; 963 964 965 default: 966 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 967 "Unsupported address space: %X\n", Reg->AddressSpaceId)); 968 return (AE_BAD_PARAMETER); 969 } 970 971 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", 972 Value, Width, 973 ACPI_HIDWORD (ACPI_GET_ADDRESS (Reg->Address)), 974 ACPI_LODWORD (ACPI_GET_ADDRESS (Reg->Address)), 975 AcpiUtGetRegionName (Reg->AddressSpaceId))); 976 977 return (Status); 978} 979