hwregs.c revision 99146
1 2/******************************************************************************* 3 * 4 * Module Name: hwregs - Read/write access functions for the various ACPI 5 * control and status registers. 6 * $Revision: 121 $ 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 "achware.h" 123#include "acnamesp.h" 124 125#define _COMPONENT ACPI_HARDWARE 126 ACPI_MODULE_NAME ("hwregs") 127 128 129/******************************************************************************* 130 * 131 * FUNCTION: AcpiHwClearAcpiStatus 132 * 133 * PARAMETERS: none 134 * 135 * RETURN: none 136 * 137 * DESCRIPTION: Clears all fixed and general purpose status bits 138 * 139 ******************************************************************************/ 140 141void 142AcpiHwClearAcpiStatus (void) 143{ 144 NATIVE_UINT i; 145 NATIVE_UINT GpeBlock; 146 ACPI_STATUS Status; 147 148 149 ACPI_FUNCTION_TRACE ("HwClearAcpiStatus"); 150 151 152 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %04X\n", 153 ACPI_BITMASK_ALL_FIXED_STATUS, 154 (UINT16) ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm1aEvtBlk.Address))); 155 156 157 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE); 158 if (ACPI_FAILURE (Status)) 159 { 160 return_VOID; 161 } 162 163 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 164 ACPI_BITMASK_ALL_FIXED_STATUS); 165 166 /* Clear the fixed events */ 167 168 if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1bEvtBlk.Address)) 169 { 170 AcpiHwLowLevelWrite (16, ACPI_BITMASK_ALL_FIXED_STATUS, 171 &AcpiGbl_FADT->XPm1bEvtBlk, 0); 172 } 173 174 /* Clear the GPE Bits */ 175 176 for (GpeBlock = 0; GpeBlock < ACPI_MAX_GPE_BLOCKS; GpeBlock++) 177 { 178 for (i = 0; i < AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount; i++) 179 { 180 AcpiHwLowLevelWrite (8, 0xFF, 181 AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress, i); 182 } 183 } 184 185 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 186 return_VOID; 187} 188 189 190/******************************************************************************* 191 * 192 * FUNCTION: AcpiHwGetSleepTypeData 193 * 194 * PARAMETERS: SleepState - Numeric sleep state 195 * *SleepTypeA - Where SLP_TYPa is returned 196 * *SleepTypeB - Where SLP_TYPb is returned 197 * 198 * RETURN: Status - ACPI status 199 * 200 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep 201 * state. 202 * 203 ******************************************************************************/ 204 205ACPI_STATUS 206AcpiHwGetSleepTypeData ( 207 UINT8 SleepState, 208 UINT8 *SleepTypeA, 209 UINT8 *SleepTypeB) 210{ 211 ACPI_STATUS Status = AE_OK; 212 ACPI_OPERAND_OBJECT *ObjDesc; 213 214 215 ACPI_FUNCTION_TRACE ("HwGetSleepTypeData"); 216 217 218 /* 219 * Validate parameters 220 */ 221 if ((SleepState > ACPI_S_STATES_MAX) || 222 !SleepTypeA || !SleepTypeB) 223 { 224 return_ACPI_STATUS (AE_BAD_PARAMETER); 225 } 226 227 /* 228 * AcpiEvaluate the namespace object containing the values for this state 229 */ 230 Status = AcpiNsEvaluateByName ((NATIVE_CHAR *) AcpiGbl_DbSleepStates[SleepState], 231 NULL, &ObjDesc); 232 if (ACPI_FAILURE (Status)) 233 { 234 return_ACPI_STATUS (Status); 235 } 236 237 if (!ObjDesc) 238 { 239 ACPI_REPORT_ERROR (("Missing Sleep State object\n")); 240 return_ACPI_STATUS (AE_NOT_EXIST); 241 } 242 243 /* 244 * We got something, now ensure it is correct. The object must 245 * be a package and must have at least 2 numeric values as the 246 * two elements 247 */ 248 249 /* Even though AcpiEvaluateObject resolves package references, 250 * NsEvaluate doesn't. So, we do it here. 251 */ 252 Status = AcpiUtResolvePackageReferences(ObjDesc); 253 254 if (ObjDesc->Package.Count < 2) 255 { 256 /* Must have at least two elements */ 257 258 ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n")); 259 Status = AE_AML_NO_OPERAND; 260 } 261 else if (((ObjDesc->Package.Elements[0])->Common.Type != ACPI_TYPE_INTEGER) || 262 ((ObjDesc->Package.Elements[1])->Common.Type != ACPI_TYPE_INTEGER)) 263 { 264 /* Must have two */ 265 266 ACPI_REPORT_ERROR (("Sleep State package elements are not both of type Number\n")); 267 Status = AE_AML_OPERAND_TYPE; 268 } 269 else 270 { 271 /* 272 * Valid _Sx_ package size, type, and value 273 */ 274 *SleepTypeA = (UINT8) (ObjDesc->Package.Elements[0])->Integer.Value; 275 *SleepTypeB = (UINT8) (ObjDesc->Package.Elements[1])->Integer.Value; 276 } 277 278 if (ACPI_FAILURE (Status)) 279 { 280 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad Sleep object %p type %X\n", 281 ObjDesc, ObjDesc->Common.Type)); 282 } 283 284 AcpiUtRemoveReference (ObjDesc); 285 return_ACPI_STATUS (Status); 286} 287 288 289/******************************************************************************* 290 * 291 * FUNCTION: AcpiHwGetRegisterBitMask 292 * 293 * PARAMETERS: RegisterId - index of ACPI Register to access 294 * 295 * RETURN: The bit mask to be used when accessing the register 296 * 297 * DESCRIPTION: Map RegisterId into a register bit mask. 298 * 299 ******************************************************************************/ 300 301ACPI_BIT_REGISTER_INFO * 302AcpiHwGetBitRegisterInfo ( 303 UINT32 RegisterId) 304{ 305 ACPI_FUNCTION_NAME ("HwGetBitRegisterInfo"); 306 307 308 if (RegisterId > ACPI_BITREG_MAX) 309 { 310 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid BitRegister ID: %X\n", RegisterId)); 311 return (NULL); 312 } 313 314 return (&AcpiGbl_BitRegisterInfo[RegisterId]); 315} 316 317 318/******************************************************************************* 319 * 320 * FUNCTION: AcpiHwBitRegisterRead 321 * 322 * PARAMETERS: RegisterId - index of ACPI Register to access 323 * UseLock - Lock the hardware 324 * 325 * RETURN: Value is read from specified Register. Value returned is 326 * normalized to bit0 (is shifted all the way right) 327 * 328 * DESCRIPTION: ACPI BitRegister read function. 329 * 330 ******************************************************************************/ 331 332UINT32 333AcpiHwBitRegisterRead ( 334 UINT32 RegisterId, 335 UINT32 Flags) 336{ 337 UINT32 RegisterValue = 0; 338 ACPI_BIT_REGISTER_INFO *BitRegInfo; 339 340 341 ACPI_FUNCTION_TRACE ("HwBitRegisterRead"); 342 343 344 if (Flags & ACPI_MTX_LOCK) 345 { 346 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 347 { 348 return_VALUE (0); 349 } 350 } 351 352 /* Get the info structure corresponding to the requested ACPI Register */ 353 354 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 355 if (!BitRegInfo) 356 { 357 return_ACPI_STATUS (AE_BAD_PARAMETER); 358 } 359 360 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, BitRegInfo->ParentRegister); 361 362 if (Flags & ACPI_MTX_LOCK) 363 { 364 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 365 } 366 367 /* Normalize the value that was read */ 368 369 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition); 370 371 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "ACPI RegisterRead: got %X\n", RegisterValue)); 372 return_VALUE (RegisterValue); 373} 374 375 376/******************************************************************************* 377 * 378 * FUNCTION: AcpiHwBitRegisterWrite 379 * 380 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 381 * Value - (only used on write) value to write to the 382 * Register, NOT pre-normalized to the bit pos. 383 * Flags - Lock the hardware or not 384 * 385 * RETURN: Value written to from specified Register. This value 386 * is shifted all the way right. 387 * 388 * DESCRIPTION: ACPI Bit Register write function. 389 * 390 ******************************************************************************/ 391 392UINT32 393AcpiHwBitRegisterWrite ( 394 UINT32 RegisterId, 395 UINT32 Value, 396 UINT32 Flags) 397{ 398 UINT32 RegisterValue = 0; 399 ACPI_BIT_REGISTER_INFO *BitRegInfo; 400 401 402 ACPI_FUNCTION_TRACE_U32 ("HwBitRegisterWrite", RegisterId); 403 404 405 if (Flags & ACPI_MTX_LOCK) 406 { 407 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 408 { 409 return_VALUE (0); 410 } 411 } 412 413 /* Get the info structure corresponding to the requested ACPI Register */ 414 415 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 416 if (!BitRegInfo) 417 { 418 return_ACPI_STATUS (AE_BAD_PARAMETER); 419 } 420 421 /* Always do a register read first so we can insert the new bits */ 422 423 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, BitRegInfo->ParentRegister); 424 425 /* 426 * Decode the Register ID 427 * Register id = Register block id | bit id 428 * 429 * Check bit id to fine locate Register offset. 430 * Check Mask to determine Register offset, and then read-write. 431 */ 432 switch (BitRegInfo->ParentRegister) 433 { 434 case ACPI_REGISTER_PM1_STATUS: 435 436 /* 437 * Status Registers are different from the rest. Clear by 438 * writing 1, writing 0 has no effect. So, the only relevent 439 * information is the single bit we're interested in, all others should 440 * be written as 0 so they will be left unchanged 441 */ 442 Value = ACPI_REGISTER_PREPARE_BITS (Value, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 443 if (Value) 444 { 445 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 446 (UINT16) Value); 447 RegisterValue = 0; 448 } 449 break; 450 451 452 case ACPI_REGISTER_PM1_ENABLE: 453 454 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 455 456 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue); 457 break; 458 459 460 case ACPI_REGISTER_PM1_CONTROL: 461 462 /* 463 * Read the PM1 Control register. 464 * Note that at this level, the fact that there are actually TWO 465 * registers (A and B - and that B may not exist) is abstracted. 466 */ 467 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue)); 468 469 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 470 471 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, RegisterId, 472 (UINT16) RegisterValue); 473 break; 474 475 476 case ACPI_REGISTER_PM2_CONTROL: 477 478 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM2_CONTROL); 479 480 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n", 481 RegisterValue, ACPI_HIDWORD (AcpiGbl_FADT->XPm2CntBlk.Address), 482 ACPI_LODWORD (AcpiGbl_FADT->XPm2CntBlk.Address))); 483 484 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 485 486 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %8.8X%8.8X\n", 487 RegisterValue, 488 ACPI_HIDWORD (AcpiGbl_FADT->XPm2CntBlk.Address), 489 ACPI_LODWORD (AcpiGbl_FADT->XPm2CntBlk.Address))); 490 491 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 492 ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue)); 493 break; 494 495 496 default: 497 break; 498 } 499 500 if (Flags & ACPI_MTX_LOCK) 501 { 502 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 503 } 504 505 /* Normalize the value that was read */ 506 507 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition); 508 509 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "ACPI RegisterWrite actual %X\n", RegisterValue)); 510 return_VALUE (RegisterValue); 511} 512 513 514/****************************************************************************** 515 * 516 * FUNCTION: AcpiHwRegisterRead 517 * 518 * PARAMETERS: UseLock - Mutex hw access. 519 * RegisterId - RegisterID + Offset. 520 * 521 * RETURN: Value read or written. 522 * 523 * DESCRIPTION: Acpi register read function. Registers are read at the 524 * given offset. 525 * 526 ******************************************************************************/ 527 528UINT32 529AcpiHwRegisterRead ( 530 BOOLEAN UseLock, 531 UINT32 RegisterId) 532{ 533 UINT32 Value = 0; 534 UINT32 BankOffset; 535 536 537 ACPI_FUNCTION_TRACE ("HwRegisterRead"); 538 539 540 if (ACPI_MTX_LOCK == UseLock) 541 { 542 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 543 { 544 return_VALUE (0); 545 } 546 } 547 548 switch (RegisterId) 549 { 550 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 551 552 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aEvtBlk, 0); 553 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 554 break; 555 556 557 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 558 559 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 560 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 561 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 562 break; 563 564 565 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 566 567 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aCntBlk, 0); 568 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bCntBlk, 0); 569 break; 570 571 572 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 573 574 Value = AcpiHwLowLevelRead (8, &AcpiGbl_FADT->XPm2CntBlk, 0); 575 break; 576 577 578 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 579 580 Value = AcpiHwLowLevelRead (32, &AcpiGbl_FADT->XPmTmrBlk, 0); 581 break; 582 583 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 584 585 AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value, 8); 586 break; 587 588 default: 589 /* Value will be returned as 0 */ 590 break; 591 } 592 593 if (ACPI_MTX_LOCK == UseLock) 594 { 595 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 596 } 597 598 return_VALUE (Value); 599} 600 601 602/****************************************************************************** 603 * 604 * FUNCTION: AcpiHwRegisterWrite 605 * 606 * PARAMETERS: UseLock - Mutex hw access. 607 * RegisterId - RegisterID + Offset. 608 * 609 * RETURN: Value read or written. 610 * 611 * DESCRIPTION: Acpi register Write function. Registers are written at the 612 * given offset. 613 * 614 ******************************************************************************/ 615 616void 617AcpiHwRegisterWrite ( 618 BOOLEAN UseLock, 619 UINT32 RegisterId, 620 UINT32 Value) 621{ 622 UINT32 BankOffset; 623 624 625 ACPI_FUNCTION_TRACE ("HwRegisterWrite"); 626 627 628 if (ACPI_MTX_LOCK == UseLock) 629 { 630 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 631 { 632 return_VOID; 633 } 634 } 635 636 switch (RegisterId) 637 { 638 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 639 640 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, 0); 641 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 642 break; 643 644 645 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 646 647 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 648 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 649 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 650 break; 651 652 653 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 654 655 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 656 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 657 break; 658 659 660 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ 661 662 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 663 break; 664 665 666 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ 667 668 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 669 break; 670 671 672 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 673 674 AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk, 0); 675 break; 676 677 678 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 679 680 AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk, 0); 681 break; 682 683 684 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 685 686 /* SMI_CMD is currently always in IO space */ 687 688 AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, Value, 8); 689 break; 690 691 692 default: 693 Value = 0; 694 break; 695 } 696 697 if (ACPI_MTX_LOCK == UseLock) 698 { 699 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 700 } 701 702 return_VOID; 703} 704 705 706/****************************************************************************** 707 * 708 * FUNCTION: AcpiHwLowLevelRead 709 * 710 * PARAMETERS: Register - GAS register structure 711 * Offset - Offset from the base address in the GAS 712 * Width - 8, 16, or 32 713 * 714 * RETURN: Value read 715 * 716 * DESCRIPTION: Read from either memory, IO, or PCI config space. 717 * 718 ******************************************************************************/ 719 720UINT32 721AcpiHwLowLevelRead ( 722 UINT32 Width, 723 ACPI_GENERIC_ADDRESS *Reg, 724 UINT32 Offset) 725{ 726 UINT32 Value = 0; 727 ACPI_PHYSICAL_ADDRESS MemAddress; 728 ACPI_IO_ADDRESS IoAddress; 729 ACPI_PCI_ID PciId; 730 UINT16 PciRegister; 731 732 733 ACPI_FUNCTION_ENTRY (); 734 735 736 /* 737 * Must have a valid pointer to a GAS structure, and 738 * a non-zero address within 739 */ 740 if ((!Reg) || 741 (!ACPI_VALID_ADDRESS (Reg->Address))) 742 { 743 return 0; 744 } 745 746 /* 747 * Three address spaces supported: 748 * Memory, Io, or PCI config. 749 */ 750 switch (Reg->AddressSpaceId) 751 { 752 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 753 754 MemAddress = (ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 755 756 AcpiOsReadMemory (MemAddress, &Value, Width); 757 break; 758 759 760 case ACPI_ADR_SPACE_SYSTEM_IO: 761 762 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 763 764 AcpiOsReadPort (IoAddress, &Value, Width); 765 break; 766 767 768 case ACPI_ADR_SPACE_PCI_CONFIG: 769 770 PciId.Segment = 0; 771 PciId.Bus = 0; 772 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 773 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 774 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) + Offset); 775 776 AcpiOsReadPciConfiguration (&PciId, PciRegister, &Value, Width); 777 break; 778 } 779 780 return Value; 781} 782 783 784/****************************************************************************** 785 * 786 * FUNCTION: AcpiHwLowLevelWrite 787 * 788 * PARAMETERS: Width - 8, 16, or 32 789 * Value - To be written 790 * Register - GAS register structure 791 * Offset - Offset from the base address in the GAS 792 * 793 * 794 * RETURN: Value read 795 * 796 * DESCRIPTION: Read from either memory, IO, or PCI config space. 797 * 798 ******************************************************************************/ 799 800void 801AcpiHwLowLevelWrite ( 802 UINT32 Width, 803 UINT32 Value, 804 ACPI_GENERIC_ADDRESS *Reg, 805 UINT32 Offset) 806{ 807 ACPI_PHYSICAL_ADDRESS MemAddress; 808 ACPI_IO_ADDRESS IoAddress; 809 ACPI_PCI_ID PciId; 810 UINT16 PciRegister; 811 812 813 ACPI_FUNCTION_ENTRY (); 814 815 816 /* 817 * Must have a valid pointer to a GAS structure, and 818 * a non-zero address within 819 */ 820 if ((!Reg) || 821 (!ACPI_VALID_ADDRESS (Reg->Address))) 822 { 823 return; 824 } 825 826 /* 827 * Three address spaces supported: 828 * Memory, Io, or PCI config. 829 */ 830 switch (Reg->AddressSpaceId) 831 { 832 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 833 834 MemAddress = (ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 835 836 AcpiOsWriteMemory (MemAddress, Value, Width); 837 break; 838 839 840 case ACPI_ADR_SPACE_SYSTEM_IO: 841 842 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 843 844 AcpiOsWritePort (IoAddress, Value, Width); 845 break; 846 847 848 case ACPI_ADR_SPACE_PCI_CONFIG: 849 850 PciId.Segment = 0; 851 PciId.Bus = 0; 852 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 853 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 854 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) + Offset); 855 856 AcpiOsWritePciConfiguration (&PciId, PciRegister, Value, Width); 857 break; 858 } 859} 860