hwregs.c revision 102550
1 2/******************************************************************************* 3 * 4 * Module Name: hwregs - Read/write access functions for the various ACPI 5 * control and status registers. 6 * $Revision: 134 $ 7 * 8 ******************************************************************************/ 9 10/****************************************************************************** 11 * 12 * 1. Copyright Notice 13 * 14 * Some or all of this work - Copyright (c) 1999 - 2002, 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" 123 124#define _COMPONENT ACPI_HARDWARE 125 ACPI_MODULE_NAME ("hwregs") 126 127 128/******************************************************************************* 129 * 130 * FUNCTION: AcpiHwClearAcpiStatus 131 * 132 * PARAMETERS: none 133 * 134 * RETURN: none 135 * 136 * DESCRIPTION: Clears all fixed and general purpose status bits 137 * 138 ******************************************************************************/ 139 140ACPI_STATUS 141AcpiHwClearAcpiStatus (void) 142{ 143 NATIVE_UINT_MAX32 i; 144 NATIVE_UINT GpeBlock; 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))); 154 155 156 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 157 if (ACPI_FAILURE (Status)) 158 { 159 return_ACPI_STATUS (Status); 160 } 161 162 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 163 ACPI_BITMASK_ALL_FIXED_STATUS); 164 if (ACPI_FAILURE (Status)) 165 { 166 goto UnlockAndExit; 167 } 168 169 /* Clear the fixed events */ 170 171 if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1bEvtBlk.Address)) 172 { 173 Status = AcpiHwLowLevelWrite (16, ACPI_BITMASK_ALL_FIXED_STATUS, 174 &AcpiGbl_FADT->XPm1bEvtBlk, 0); 175 if (ACPI_FAILURE (Status)) 176 { 177 goto UnlockAndExit; 178 } 179 } 180 181 /* Clear the GPE Bits */ 182 183 for (GpeBlock = 0; GpeBlock < ACPI_MAX_GPE_BLOCKS; GpeBlock++) 184 { 185 for (i = 0; i < AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount; i++) 186 { 187 Status = AcpiHwLowLevelWrite (8, 0xFF, 188 AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress, i); 189 if (ACPI_FAILURE (Status)) 190 { 191 goto UnlockAndExit; 192 } 193 } 194 } 195 196UnlockAndExit: 197 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 198 return_ACPI_STATUS (Status); 199} 200 201 202/******************************************************************************* 203 * 204 * FUNCTION: AcpiGetSleepTypeData 205 * 206 * PARAMETERS: SleepState - Numeric sleep state 207 * *SleepTypeA - Where SLP_TYPa is returned 208 * *SleepTypeB - Where SLP_TYPb is returned 209 * 210 * RETURN: Status - ACPI status 211 * 212 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep 213 * state. 214 * 215 ******************************************************************************/ 216 217ACPI_STATUS 218AcpiGetSleepTypeData ( 219 UINT8 SleepState, 220 UINT8 *SleepTypeA, 221 UINT8 *SleepTypeB) 222{ 223 ACPI_STATUS Status = AE_OK; 224 ACPI_OPERAND_OBJECT *ObjDesc; 225 226 227 ACPI_FUNCTION_TRACE ("AcpiGetSleepTypeData"); 228 229 230 /* 231 * Validate parameters 232 */ 233 if ((SleepState > ACPI_S_STATES_MAX) || 234 !SleepTypeA || !SleepTypeB) 235 { 236 return_ACPI_STATUS (AE_BAD_PARAMETER); 237 } 238 239 /* 240 * Evaluate the namespace object containing the values for this state 241 */ 242 Status = AcpiNsEvaluateByName ((NATIVE_CHAR *) AcpiGbl_DbSleepStates[SleepState], 243 NULL, &ObjDesc); 244 if (ACPI_FAILURE (Status)) 245 { 246 return_ACPI_STATUS (Status); 247 } 248 249 /* Must have a return object */ 250 251 if (!ObjDesc) 252 { 253 ACPI_REPORT_ERROR (("Missing Sleep State object\n")); 254 Status = AE_NOT_EXIST; 255 } 256 257 /* It must be of type Package */ 258 259 else if (ACPI_GET_OBJECT_TYPE (ObjDesc) != ACPI_TYPE_PACKAGE) 260 { 261 ACPI_REPORT_ERROR (("Sleep State object not a Package\n")); 262 Status = AE_AML_OPERAND_TYPE; 263 } 264 265 /* The package must have at least two elements */ 266 267 else if (ObjDesc->Package.Count < 2) 268 { 269 ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n")); 270 Status = AE_AML_NO_OPERAND; 271 } 272 273 /* The first two elements must both be of type Integer */ 274 275 else if ((ACPI_GET_OBJECT_TYPE (ObjDesc->Package.Elements[0]) != ACPI_TYPE_INTEGER) || 276 (ACPI_GET_OBJECT_TYPE (ObjDesc->Package.Elements[1]) != ACPI_TYPE_INTEGER)) 277 { 278 ACPI_REPORT_ERROR (("Sleep State package elements are not both Integers (%s, %s)\n", 279 AcpiUtGetObjectTypeName (ObjDesc->Package.Elements[0]), 280 AcpiUtGetObjectTypeName (ObjDesc->Package.Elements[1]))); 281 Status = AE_AML_OPERAND_TYPE; 282 } 283 else 284 { 285 /* 286 * Valid _Sx_ package size, type, and value 287 */ 288 *SleepTypeA = (UINT8) (ObjDesc->Package.Elements[0])->Integer.Value; 289 *SleepTypeB = (UINT8) (ObjDesc->Package.Elements[1])->Integer.Value; 290 } 291 292 if (ACPI_FAILURE (Status)) 293 { 294 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad Sleep object %p type %s\n", 295 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 296 } 297 298 AcpiUtRemoveReference (ObjDesc); 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 - Index of ACPI Register to access 337 * UseLock - Lock the hardware 338 * 339 * RETURN: Value is read from specified Register. Value returned is 340 * normalized to bit0 (is shifted all the way right) 341 * 342 * DESCRIPTION: ACPI BitRegister read function. 343 * 344 ******************************************************************************/ 345 346ACPI_STATUS 347AcpiGetRegister ( 348 UINT32 RegisterId, 349 UINT32 *ReturnValue, 350 UINT32 Flags) 351{ 352 UINT32 RegisterValue = 0; 353 ACPI_BIT_REGISTER_INFO *BitRegInfo; 354 ACPI_STATUS Status; 355 356 357 ACPI_FUNCTION_TRACE ("AcpiGetRegister"); 358 359 360 /* Get the info structure corresponding to the requested ACPI Register */ 361 362 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 363 if (!BitRegInfo) 364 { 365 return_ACPI_STATUS (AE_BAD_PARAMETER); 366 } 367 368 if (Flags & ACPI_MTX_LOCK) 369 { 370 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 371 if (ACPI_FAILURE (Status)) 372 { 373 return_ACPI_STATUS (Status); 374 } 375 } 376 377 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 378 BitRegInfo->ParentRegister, &RegisterValue); 379 380 if (Flags & ACPI_MTX_LOCK) 381 { 382 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 383 } 384 385 if (ACPI_SUCCESS (Status)) 386 { 387 /* Normalize the value that was read */ 388 389 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) 390 >> BitRegInfo->BitPosition); 391 392 *ReturnValue = RegisterValue; 393 394 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %X\n", RegisterValue)); 395 } 396 397 return_ACPI_STATUS (Status); 398} 399 400 401/******************************************************************************* 402 * 403 * FUNCTION: AcpiSetRegister 404 * 405 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 406 * Value - (only used on write) value to write to the 407 * Register, NOT pre-normalized to the bit pos. 408 * Flags - Lock the hardware or not 409 * 410 * RETURN: None 411 * 412 * DESCRIPTION: ACPI Bit Register write function. 413 * 414 ******************************************************************************/ 415 416ACPI_STATUS 417AcpiSetRegister ( 418 UINT32 RegisterId, 419 UINT32 Value, 420 UINT32 Flags) 421{ 422 UINT32 RegisterValue = 0; 423 ACPI_BIT_REGISTER_INFO *BitRegInfo; 424 ACPI_STATUS Status; 425 426 427 ACPI_FUNCTION_TRACE_U32 ("AcpiSetRegister", RegisterId); 428 429 430 /* Get the info structure corresponding to the requested ACPI Register */ 431 432 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 433 if (!BitRegInfo) 434 { 435 ACPI_REPORT_ERROR (("Bad ACPI HW RegisterId: %X\n", RegisterId)); 436 return_ACPI_STATUS (AE_BAD_PARAMETER); 437 } 438 439 if (Flags & ACPI_MTX_LOCK) 440 { 441 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 442 if (ACPI_FAILURE (Status)) 443 { 444 return_ACPI_STATUS (Status); 445 } 446 } 447 448 /* Always do a register read first so we can insert the new bits */ 449 450 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 451 BitRegInfo->ParentRegister, &RegisterValue); 452 if (ACPI_FAILURE (Status)) 453 { 454 goto UnlockAndExit; 455 } 456 457 /* 458 * Decode the Register ID 459 * Register id = Register block id | bit id 460 * 461 * Check bit id to fine locate Register offset. 462 * Check Mask to determine Register offset, and then read-write. 463 */ 464 switch (BitRegInfo->ParentRegister) 465 { 466 case ACPI_REGISTER_PM1_STATUS: 467 468 /* 469 * Status Registers are different from the rest. Clear by 470 * writing 1, writing 0 has no effect. So, the only relevent 471 * information is the single bit we're interested in, all others should 472 * be written as 0 so they will be left unchanged 473 */ 474 Value = ACPI_REGISTER_PREPARE_BITS (Value, 475 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 476 if (Value) 477 { 478 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 479 ACPI_REGISTER_PM1_STATUS, (UINT16) Value); 480 RegisterValue = 0; 481 } 482 break; 483 484 485 case ACPI_REGISTER_PM1_ENABLE: 486 487 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 488 BitRegInfo->AccessBitMask, Value); 489 490 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 491 ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue); 492 break; 493 494 495 case ACPI_REGISTER_PM1_CONTROL: 496 497 /* 498 * Read the PM1 Control register. 499 * Note that at this level, the fact that there are actually TWO 500 * registers (A and B - and that B may not exist) is abstracted. 501 */ 502 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue)); 503 504 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 505 BitRegInfo->AccessBitMask, Value); 506 507 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, RegisterId, 508 (UINT16) RegisterValue); 509 break; 510 511 512 case ACPI_REGISTER_PM2_CONTROL: 513 514 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 515 ACPI_REGISTER_PM2_CONTROL, &RegisterValue); 516 if (ACPI_FAILURE (Status)) 517 { 518 goto UnlockAndExit; 519 } 520 521 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n", 522 RegisterValue, 523 ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)), 524 ACPI_LODWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)))); 525 526 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 527 BitRegInfo->AccessBitMask, Value); 528 529 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n", 530 RegisterValue, 531 ACPI_HIDWORD (ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm2CntBlk.Address)), 532 ACPI_LODWORD (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, "ACPI Register Write actual %X\n", RegisterValue)); 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 UINT32 BankOffset; 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, 0); 603 if (ACPI_FAILURE (Status)) 604 { 605 goto UnlockAndExit; 606 } 607 608 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 609 Value1 |= Value2; 610 break; 611 612 613 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 614 615 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 616 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 617 if (ACPI_FAILURE (Status)) 618 { 619 goto UnlockAndExit; 620 } 621 622 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 623 Value1 |= Value2; 624 break; 625 626 627 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 628 629 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aCntBlk, 0); 630 if (ACPI_FAILURE (Status)) 631 { 632 goto UnlockAndExit; 633 } 634 635 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bCntBlk, 0); 636 Value1 |= Value2; 637 break; 638 639 640 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 641 642 Status = AcpiHwLowLevelRead (8, &Value1, &AcpiGbl_FADT->XPm2CntBlk, 0); 643 break; 644 645 646 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 647 648 Status = AcpiHwLowLevelRead (32, &Value1, &AcpiGbl_FADT->XPmTmrBlk, 0); 649 break; 650 651 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 652 653 Status = AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value1, 8); 654 break; 655 656 default: 657 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Register ID: %X\n", RegisterId)); 658 Status = AE_BAD_PARAMETER; 659 break; 660 } 661 662UnlockAndExit: 663 if (ACPI_MTX_LOCK == UseLock) 664 { 665 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 666 } 667 668 if (ACPI_SUCCESS (Status)) 669 { 670 *ReturnValue = Value1; 671 } 672 673 return_ACPI_STATUS (Status); 674} 675 676 677/****************************************************************************** 678 * 679 * FUNCTION: AcpiHwRegisterWrite 680 * 681 * PARAMETERS: UseLock - Mutex hw access. 682 * RegisterId - RegisterID + Offset. 683 * 684 * RETURN: Value read or written. 685 * 686 * DESCRIPTION: Acpi register Write function. Registers are written at the 687 * given offset. 688 * 689 ******************************************************************************/ 690 691ACPI_STATUS 692AcpiHwRegisterWrite ( 693 BOOLEAN UseLock, 694 UINT32 RegisterId, 695 UINT32 Value) 696{ 697 UINT32 BankOffset; 698 ACPI_STATUS Status; 699 700 701 ACPI_FUNCTION_TRACE ("HwRegisterWrite"); 702 703 704 if (ACPI_MTX_LOCK == UseLock) 705 { 706 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 707 if (ACPI_FAILURE (Status)) 708 { 709 return_ACPI_STATUS (Status); 710 } 711 } 712 713 switch (RegisterId) 714 { 715 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 716 717 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, 0); 718 if (ACPI_FAILURE (Status)) 719 { 720 goto UnlockAndExit; 721 } 722 723 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 724 break; 725 726 727 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 728 729 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 730 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 731 if (ACPI_FAILURE (Status)) 732 { 733 goto UnlockAndExit; 734 } 735 736 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 737 break; 738 739 740 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 741 742 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 743 if (ACPI_FAILURE (Status)) 744 { 745 goto UnlockAndExit; 746 } 747 748 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 749 break; 750 751 752 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ 753 754 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 755 break; 756 757 758 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ 759 760 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 761 break; 762 763 764 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 765 766 Status = AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk, 0); 767 break; 768 769 770 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 771 772 Status = AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk, 0); 773 break; 774 775 776 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 777 778 /* SMI_CMD is currently always in IO space */ 779 780 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, (ACPI_INTEGER) Value, 8); 781 break; 782 783 784 default: 785 Status = AE_BAD_PARAMETER; 786 break; 787 } 788 789UnlockAndExit: 790 if (ACPI_MTX_LOCK == UseLock) 791 { 792 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 793 } 794 795 return_ACPI_STATUS (Status); 796} 797 798 799/****************************************************************************** 800 * 801 * FUNCTION: AcpiHwLowLevelRead 802 * 803 * PARAMETERS: Register - GAS register structure 804 * Offset - Offset from the base address in the GAS 805 * Width - 8, 16, or 32 806 * 807 * RETURN: Value read 808 * 809 * DESCRIPTION: Read from either memory, IO, or PCI config space. 810 * 811 ******************************************************************************/ 812 813ACPI_STATUS 814AcpiHwLowLevelRead ( 815 UINT32 Width, 816 UINT32 *Value, 817 ACPI_GENERIC_ADDRESS *Reg, 818 UINT32 Offset) 819{ 820 ACPI_PHYSICAL_ADDRESS MemAddress; 821 ACPI_IO_ADDRESS IoAddress; 822 ACPI_PCI_ID PciId; 823 UINT16 PciRegister; 824 ACPI_STATUS Status; 825 826 827 ACPI_FUNCTION_NAME ("HwLowLevelRead"); 828 829 830 /* 831 * Must have a valid pointer to a GAS structure, and 832 * a non-zero address within. However, don't return an error 833 * because the PM1A/B code must not fail if B isn't present. 834 */ 835 if ((!Reg) || 836 (!ACPI_VALID_ADDRESS (Reg->Address))) 837 { 838 return (AE_OK); 839 } 840 *Value = 0; 841 842 /* 843 * Three address spaces supported: 844 * Memory, Io, or PCI config. 845 */ 846 switch (Reg->AddressSpaceId) 847 { 848 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 849 850 MemAddress = (ACPI_GET_ADDRESS (Reg->Address) 851 + (ACPI_PHYSICAL_ADDRESS) Offset); 852 853 Status = AcpiOsReadMemory (MemAddress, Value, Width); 854 break; 855 856 857 case ACPI_ADR_SPACE_SYSTEM_IO: 858 859 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) 860 + (ACPI_PHYSICAL_ADDRESS) Offset); 861 862 Status = AcpiOsReadPort (IoAddress, Value, Width); 863 break; 864 865 866 case ACPI_ADR_SPACE_PCI_CONFIG: 867 868 PciId.Segment = 0; 869 PciId.Bus = 0; 870 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 871 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 872 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) 873 + Offset); 874 875 Status = AcpiOsReadPciConfiguration (&PciId, PciRegister, Value, Width); 876 break; 877 878 879 default: 880 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported address space: %X\n", Reg->AddressSpaceId)); 881 Status = AE_BAD_PARAMETER; 882 break; 883 } 884 885 return (Status); 886} 887 888 889/****************************************************************************** 890 * 891 * FUNCTION: AcpiHwLowLevelWrite 892 * 893 * PARAMETERS: Width - 8, 16, or 32 894 * Value - To be written 895 * Register - GAS register structure 896 * Offset - Offset from the base address in the GAS 897 * 898 * 899 * RETURN: Value read 900 * 901 * DESCRIPTION: Read from either memory, IO, or PCI config space. 902 * 903 ******************************************************************************/ 904 905ACPI_STATUS 906AcpiHwLowLevelWrite ( 907 UINT32 Width, 908 UINT32 Value, 909 ACPI_GENERIC_ADDRESS *Reg, 910 UINT32 Offset) 911{ 912 ACPI_PHYSICAL_ADDRESS MemAddress; 913 ACPI_IO_ADDRESS IoAddress; 914 ACPI_PCI_ID PciId; 915 UINT16 PciRegister; 916 ACPI_STATUS Status; 917 918 919 ACPI_FUNCTION_NAME ("HwLowLevelWrite"); 920 921 922 /* 923 * Must have a valid pointer to a GAS structure, and 924 * a non-zero address within. However, don't return an error 925 * because the PM1A/B code must not fail if B isn't present. 926 */ 927 if ((!Reg) || 928 (!ACPI_VALID_ADDRESS (Reg->Address))) 929 { 930 return (AE_OK); 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 MemAddress = (ACPI_GET_ADDRESS (Reg->Address) 941 + (ACPI_PHYSICAL_ADDRESS) Offset); 942 943 Status = AcpiOsWriteMemory (MemAddress, (ACPI_INTEGER) Value, Width); 944 break; 945 946 947 case ACPI_ADR_SPACE_SYSTEM_IO: 948 949 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) 950 + (ACPI_PHYSICAL_ADDRESS) Offset); 951 952 Status = AcpiOsWritePort (IoAddress, (ACPI_INTEGER) Value, Width); 953 break; 954 955 956 case ACPI_ADR_SPACE_PCI_CONFIG: 957 958 PciId.Segment = 0; 959 PciId.Bus = 0; 960 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 961 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 962 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) 963 + Offset); 964 965 Status = AcpiOsWritePciConfiguration (&PciId, PciRegister, (ACPI_INTEGER) Value, Width); 966 break; 967 968 969 default: 970 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported address space: %X\n", Reg->AddressSpaceId)); 971 Status = AE_BAD_PARAMETER; 972 break; 973 } 974 975 return (Status); 976} 977