hwregs.c revision 91116
1 2/******************************************************************************* 3 * 4 * Module Name: hwregs - Read/write access functions for the various ACPI 5 * control and status registers. 6 * $Revision: 120 $ 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 AcpiOsWritePort ((ACPI_IO_ADDRESS) 171 ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm1bEvtBlk.Address), 172 ACPI_BITMASK_ALL_FIXED_STATUS, 16); 173 } 174 175 /* Clear the GPE Bits */ 176 177 for (GpeBlock = 0; GpeBlock < ACPI_MAX_GPE_BLOCKS; GpeBlock++) 178 { 179 for (i = 0; i < AcpiGbl_GpeBlockInfo[GpeBlock].RegisterCount; i++) 180 { 181 AcpiOsWritePort ((ACPI_IO_ADDRESS) 182 (AcpiGbl_GpeBlockInfo[GpeBlock].BlockAddress + i), 183 0xFF, 8); 184 } 185 } 186 187 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 188 return_VOID; 189} 190 191 192/******************************************************************************* 193 * 194 * FUNCTION: AcpiHwGetSleepTypeData 195 * 196 * PARAMETERS: SleepState - Numeric sleep state 197 * *SleepTypeA - Where SLP_TYPa is returned 198 * *SleepTypeB - Where SLP_TYPb is returned 199 * 200 * RETURN: Status - ACPI status 201 * 202 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep 203 * state. 204 * 205 ******************************************************************************/ 206 207ACPI_STATUS 208AcpiHwGetSleepTypeData ( 209 UINT8 SleepState, 210 UINT8 *SleepTypeA, 211 UINT8 *SleepTypeB) 212{ 213 ACPI_STATUS Status = AE_OK; 214 ACPI_OPERAND_OBJECT *ObjDesc; 215 216 217 ACPI_FUNCTION_TRACE ("HwGetSleepTypeData"); 218 219 220 /* 221 * Validate parameters 222 */ 223 if ((SleepState > ACPI_S_STATES_MAX) || 224 !SleepTypeA || !SleepTypeB) 225 { 226 return_ACPI_STATUS (AE_BAD_PARAMETER); 227 } 228 229 /* 230 * AcpiEvaluate the namespace object containing the values for this state 231 */ 232 Status = AcpiNsEvaluateByName ((NATIVE_CHAR *) AcpiGbl_DbSleepStates[SleepState], 233 NULL, &ObjDesc); 234 if (ACPI_FAILURE (Status)) 235 { 236 return_ACPI_STATUS (Status); 237 } 238 239 if (!ObjDesc) 240 { 241 ACPI_REPORT_ERROR (("Missing Sleep State object\n")); 242 return_ACPI_STATUS (AE_NOT_EXIST); 243 } 244 245 /* 246 * We got something, now ensure it is correct. The object must 247 * be a package and must have at least 2 numeric values as the 248 * two elements 249 */ 250 251 /* Even though AcpiEvaluateObject resolves package references, 252 * NsEvaluate doesn't. So, we do it here. 253 */ 254 Status = AcpiUtResolvePackageReferences(ObjDesc); 255 256 if (ObjDesc->Package.Count < 2) 257 { 258 /* Must have at least two elements */ 259 260 ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n")); 261 Status = AE_AML_NO_OPERAND; 262 } 263 else if (((ObjDesc->Package.Elements[0])->Common.Type != ACPI_TYPE_INTEGER) || 264 ((ObjDesc->Package.Elements[1])->Common.Type != ACPI_TYPE_INTEGER)) 265 { 266 /* Must have two */ 267 268 ACPI_REPORT_ERROR (("Sleep State package elements are not both of type Number\n")); 269 Status = AE_AML_OPERAND_TYPE; 270 } 271 else 272 { 273 /* 274 * Valid _Sx_ package size, type, and value 275 */ 276 *SleepTypeA = (UINT8) (ObjDesc->Package.Elements[0])->Integer.Value; 277 *SleepTypeB = (UINT8) (ObjDesc->Package.Elements[1])->Integer.Value; 278 } 279 280 if (ACPI_FAILURE (Status)) 281 { 282 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad Sleep object %p type %X\n", 283 ObjDesc, ObjDesc->Common.Type)); 284 } 285 286 AcpiUtRemoveReference (ObjDesc); 287 return_ACPI_STATUS (Status); 288} 289 290 291/******************************************************************************* 292 * 293 * FUNCTION: AcpiHwGetRegisterBitMask 294 * 295 * PARAMETERS: RegisterId - index of ACPI Register to access 296 * 297 * RETURN: The bit mask to be used when accessing the register 298 * 299 * DESCRIPTION: Map RegisterId into a register bit mask. 300 * 301 ******************************************************************************/ 302 303ACPI_BIT_REGISTER_INFO * 304AcpiHwGetBitRegisterInfo ( 305 UINT32 RegisterId) 306{ 307 ACPI_FUNCTION_NAME ("HwGetBitRegisterInfo"); 308 309 310 if (RegisterId > ACPI_BITREG_MAX) 311 { 312 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid BitRegister ID: %X\n", RegisterId)); 313 return (NULL); 314 } 315 316 return (&AcpiGbl_BitRegisterInfo[RegisterId]); 317} 318 319 320/******************************************************************************* 321 * 322 * FUNCTION: AcpiHwBitRegisterRead 323 * 324 * PARAMETERS: RegisterId - index of ACPI Register to access 325 * UseLock - Lock the hardware 326 * 327 * RETURN: Value is read from specified Register. Value returned is 328 * normalized to bit0 (is shifted all the way right) 329 * 330 * DESCRIPTION: ACPI BitRegister read function. 331 * 332 ******************************************************************************/ 333 334UINT32 335AcpiHwBitRegisterRead ( 336 UINT32 RegisterId, 337 UINT32 Flags) 338{ 339 UINT32 RegisterValue = 0; 340 ACPI_BIT_REGISTER_INFO *BitRegInfo; 341 342 343 ACPI_FUNCTION_TRACE ("HwBitRegisterRead"); 344 345 346 if (Flags & ACPI_MTX_LOCK) 347 { 348 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 349 { 350 return_VALUE (0); 351 } 352 } 353 354 /* Get the info structure corresponding to the requested ACPI Register */ 355 356 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 357 if (!BitRegInfo) 358 { 359 return_ACPI_STATUS (AE_BAD_PARAMETER); 360 } 361 362 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, BitRegInfo->ParentRegister); 363 364 if (Flags & ACPI_MTX_LOCK) 365 { 366 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 367 } 368 369 /* Normalize the value that was read */ 370 371 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition); 372 373 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "ACPI RegisterRead: got %X\n", RegisterValue)); 374 return_VALUE (RegisterValue); 375} 376 377 378/******************************************************************************* 379 * 380 * FUNCTION: AcpiHwBitRegisterWrite 381 * 382 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access 383 * Value - (only used on write) value to write to the 384 * Register, NOT pre-normalized to the bit pos. 385 * Flags - Lock the hardware or not 386 * 387 * RETURN: Value written to from specified Register. This value 388 * is shifted all the way right. 389 * 390 * DESCRIPTION: ACPI Bit Register write function. 391 * 392 ******************************************************************************/ 393 394UINT32 395AcpiHwBitRegisterWrite ( 396 UINT32 RegisterId, 397 UINT32 Value, 398 UINT32 Flags) 399{ 400 UINT32 RegisterValue = 0; 401 ACPI_BIT_REGISTER_INFO *BitRegInfo; 402 403 404 ACPI_FUNCTION_TRACE_U32 ("HwBitRegisterWrite", RegisterId); 405 406 407 if (Flags & ACPI_MTX_LOCK) 408 { 409 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 410 { 411 return_VALUE (0); 412 } 413 } 414 415 /* Get the info structure corresponding to the requested ACPI Register */ 416 417 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 418 if (!BitRegInfo) 419 { 420 return_ACPI_STATUS (AE_BAD_PARAMETER); 421 } 422 423 /* Always do a register read first so we can insert the new bits */ 424 425 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, BitRegInfo->ParentRegister); 426 427 /* 428 * Decode the Register ID 429 * Register id = Register block id | bit id 430 * 431 * Check bit id to fine locate Register offset. 432 * Check Mask to determine Register offset, and then read-write. 433 */ 434 switch (BitRegInfo->ParentRegister) 435 { 436 case ACPI_REGISTER_PM1_STATUS: 437 438 /* 439 * Status Registers are different from the rest. Clear by 440 * writing 1, writing 0 has no effect. So, the only relevent 441 * information is the single bit we're interested in, all others should 442 * be written as 0 so they will be left unchanged 443 */ 444 Value = ACPI_REGISTER_PREPARE_BITS (Value, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 445 if (Value) 446 { 447 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 448 (UINT16) Value); 449 RegisterValue = 0; 450 } 451 break; 452 453 454 case ACPI_REGISTER_PM1_ENABLE: 455 456 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 457 458 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue); 459 break; 460 461 462 case ACPI_REGISTER_PM1_CONTROL: 463 464 /* 465 * Read the PM1 Control register. 466 * Note that at this level, the fact that there are actually TWO 467 * registers (A and B - and that B may not exist) is abstracted. 468 */ 469 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue)); 470 471 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 472 473 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, RegisterId, 474 (UINT16) RegisterValue); 475 break; 476 477 478 case ACPI_REGISTER_PM2_CONTROL: 479 480 RegisterValue = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM2_CONTROL); 481 482 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n", 483 RegisterValue, ACPI_HIDWORD (AcpiGbl_FADT->XPm2CntBlk.Address), 484 ACPI_LODWORD (AcpiGbl_FADT->XPm2CntBlk.Address))); 485 486 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); 487 488 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %8.8X%8.8X\n", 489 RegisterValue, 490 ACPI_HIDWORD (AcpiGbl_FADT->XPm2CntBlk.Address), 491 ACPI_LODWORD (AcpiGbl_FADT->XPm2CntBlk.Address))); 492 493 AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 494 ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue)); 495 break; 496 497 498 default: 499 break; 500 } 501 502 if (Flags & ACPI_MTX_LOCK) 503 { 504 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 505 } 506 507 /* Normalize the value that was read */ 508 509 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition); 510 511 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "ACPI RegisterWrite actual %X\n", RegisterValue)); 512 return_VALUE (RegisterValue); 513} 514 515 516/****************************************************************************** 517 * 518 * FUNCTION: AcpiHwRegisterRead 519 * 520 * PARAMETERS: UseLock - Mutex hw access. 521 * RegisterId - RegisterID + Offset. 522 * 523 * RETURN: Value read or written. 524 * 525 * DESCRIPTION: Acpi register read function. Registers are read at the 526 * given offset. 527 * 528 ******************************************************************************/ 529 530UINT32 531AcpiHwRegisterRead ( 532 BOOLEAN UseLock, 533 UINT32 RegisterId) 534{ 535 UINT32 Value = 0; 536 UINT32 BankOffset; 537 538 539 ACPI_FUNCTION_TRACE ("HwRegisterRead"); 540 541 542 if (ACPI_MTX_LOCK == UseLock) 543 { 544 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 545 { 546 return_VALUE (0); 547 } 548 } 549 550 switch (RegisterId) 551 { 552 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 553 554 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aEvtBlk, 0); 555 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 556 break; 557 558 559 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 560 561 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 562 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 563 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 564 break; 565 566 567 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 568 569 Value = AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1aCntBlk, 0); 570 Value |= AcpiHwLowLevelRead (16, &AcpiGbl_FADT->XPm1bCntBlk, 0); 571 break; 572 573 574 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 575 576 Value = AcpiHwLowLevelRead (8, &AcpiGbl_FADT->XPm2CntBlk, 0); 577 break; 578 579 580 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 581 582 Value = AcpiHwLowLevelRead (32, &AcpiGbl_FADT->XPmTmrBlk, 0); 583 break; 584 585 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 586 587 AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value, 8); 588 break; 589 590 default: 591 /* Value will be returned as 0 */ 592 break; 593 } 594 595 if (ACPI_MTX_LOCK == UseLock) 596 { 597 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 598 } 599 600 return_VALUE (Value); 601} 602 603 604/****************************************************************************** 605 * 606 * FUNCTION: AcpiHwRegisterWrite 607 * 608 * PARAMETERS: UseLock - Mutex hw access. 609 * RegisterId - RegisterID + Offset. 610 * 611 * RETURN: Value read or written. 612 * 613 * DESCRIPTION: Acpi register Write function. Registers are written at the 614 * given offset. 615 * 616 ******************************************************************************/ 617 618void 619AcpiHwRegisterWrite ( 620 BOOLEAN UseLock, 621 UINT32 RegisterId, 622 UINT32 Value) 623{ 624 UINT32 BankOffset; 625 626 627 ACPI_FUNCTION_TRACE ("HwRegisterWrite"); 628 629 630 if (ACPI_MTX_LOCK == UseLock) 631 { 632 if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_HARDWARE))) 633 { 634 return_VOID; 635 } 636 } 637 638 switch (RegisterId) 639 { 640 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ 641 642 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, 0); 643 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, 0); 644 break; 645 646 647 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/ 648 649 BankOffset = ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen); 650 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk, BankOffset); 651 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk, BankOffset); 652 break; 653 654 655 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */ 656 657 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 658 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 659 break; 660 661 662 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */ 663 664 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk, 0); 665 break; 666 667 668 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */ 669 670 AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk, 0); 671 break; 672 673 674 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */ 675 676 AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk, 0); 677 break; 678 679 680 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */ 681 682 AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk, 0); 683 break; 684 685 686 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */ 687 688 /* SMI_CMD is currently always in IO space */ 689 690 AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, Value, 8); 691 break; 692 693 694 default: 695 Value = 0; 696 break; 697 } 698 699 if (ACPI_MTX_LOCK == UseLock) 700 { 701 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE); 702 } 703 704 return_VOID; 705} 706 707 708/****************************************************************************** 709 * 710 * FUNCTION: AcpiHwLowLevelRead 711 * 712 * PARAMETERS: Register - GAS register structure 713 * Offset - Offset from the base address in the GAS 714 * Width - 8, 16, or 32 715 * 716 * RETURN: Value read 717 * 718 * DESCRIPTION: Read from either memory, IO, or PCI config space. 719 * 720 ******************************************************************************/ 721 722UINT32 723AcpiHwLowLevelRead ( 724 UINT32 Width, 725 ACPI_GENERIC_ADDRESS *Reg, 726 UINT32 Offset) 727{ 728 UINT32 Value = 0; 729 ACPI_PHYSICAL_ADDRESS MemAddress; 730 ACPI_IO_ADDRESS IoAddress; 731 ACPI_PCI_ID PciId; 732 UINT16 PciRegister; 733 734 735 ACPI_FUNCTION_ENTRY (); 736 737 738 /* 739 * Must have a valid pointer to a GAS structure, and 740 * a non-zero address within 741 */ 742 if ((!Reg) || 743 (!ACPI_VALID_ADDRESS (Reg->Address))) 744 { 745 return 0; 746 } 747 748 /* 749 * Three address spaces supported: 750 * Memory, Io, or PCI config. 751 */ 752 switch (Reg->AddressSpaceId) 753 { 754 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 755 756 MemAddress = (ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 757 758 AcpiOsReadMemory (MemAddress, &Value, Width); 759 break; 760 761 762 case ACPI_ADR_SPACE_SYSTEM_IO: 763 764 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 765 766 AcpiOsReadPort (IoAddress, &Value, Width); 767 break; 768 769 770 case ACPI_ADR_SPACE_PCI_CONFIG: 771 772 PciId.Segment = 0; 773 PciId.Bus = 0; 774 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 775 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 776 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) + Offset); 777 778 AcpiOsReadPciConfiguration (&PciId, PciRegister, &Value, Width); 779 break; 780 } 781 782 return Value; 783} 784 785 786/****************************************************************************** 787 * 788 * FUNCTION: AcpiHwLowLevelWrite 789 * 790 * PARAMETERS: Width - 8, 16, or 32 791 * Value - To be written 792 * Register - GAS register structure 793 * Offset - Offset from the base address in the GAS 794 * 795 * 796 * RETURN: Value read 797 * 798 * DESCRIPTION: Read from either memory, IO, or PCI config space. 799 * 800 ******************************************************************************/ 801 802void 803AcpiHwLowLevelWrite ( 804 UINT32 Width, 805 UINT32 Value, 806 ACPI_GENERIC_ADDRESS *Reg, 807 UINT32 Offset) 808{ 809 ACPI_PHYSICAL_ADDRESS MemAddress; 810 ACPI_IO_ADDRESS IoAddress; 811 ACPI_PCI_ID PciId; 812 UINT16 PciRegister; 813 814 815 ACPI_FUNCTION_ENTRY (); 816 817 818 /* 819 * Must have a valid pointer to a GAS structure, and 820 * a non-zero address within 821 */ 822 if ((!Reg) || 823 (!ACPI_VALID_ADDRESS (Reg->Address))) 824 { 825 return; 826 } 827 828 /* 829 * Three address spaces supported: 830 * Memory, Io, or PCI config. 831 */ 832 switch (Reg->AddressSpaceId) 833 { 834 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 835 836 MemAddress = (ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 837 838 AcpiOsWriteMemory (MemAddress, Value, Width); 839 break; 840 841 842 case ACPI_ADR_SPACE_SYSTEM_IO: 843 844 IoAddress = (ACPI_IO_ADDRESS) (ACPI_GET_ADDRESS (Reg->Address) + Offset); 845 846 AcpiOsWritePort (IoAddress, Value, Width); 847 break; 848 849 850 case ACPI_ADR_SPACE_PCI_CONFIG: 851 852 PciId.Segment = 0; 853 PciId.Bus = 0; 854 PciId.Device = ACPI_PCI_DEVICE (ACPI_GET_ADDRESS (Reg->Address)); 855 PciId.Function = ACPI_PCI_FUNCTION (ACPI_GET_ADDRESS (Reg->Address)); 856 PciRegister = (UINT16) (ACPI_PCI_REGISTER (ACPI_GET_ADDRESS (Reg->Address)) + Offset); 857 858 AcpiOsWritePciConfiguration (&PciId, PciRegister, Value, Width); 859 break; 860 } 861} 862