drivers/acpi/executer/exregion.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exregion - ACPI default OpRegion (address space) handlers
   5  *
   6  *****************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117
 118 #define __EXREGION_C__
 119
 120 #include "acpi.h"
 121 #include "accommon.h"
 122 #include "acinterp.h"
 123
 124
 125 #define _COMPONENT          ACPI_EXECUTER
 126         ACPI_MODULE_NAME    ("exregion")
 127
 128
 129 /*******************************************************************************
 130  *
 131  * FUNCTION:    AcpiExSystemMemorySpaceHandler
 132  *
 133  * PARAMETERS:  Function            - Read or Write operation
 134  *              Address             - Where in the space to read or write
 135  *              BitWidth            - Field width in bits (8, 16, or 32)
 136  *              Value               - Pointer to in or out value
 137  *              HandlerContext      - Pointer to Handler's context
 138  *              RegionContext       - Pointer to context specific to the
 139  *                                    accessed region
 140  *
 141  * RETURN:      Status
 142  *
 143  * DESCRIPTION: Handler for the System Memory address space (Op Region)
 144  *
 145  ******************************************************************************/
 146
 147 ACPI_STATUS
 148 AcpiExSystemMemorySpaceHandler (
 149     UINT32                  Function,
 150     ACPI_PHYSICAL_ADDRESS   Address,
 151     UINT32                  BitWidth,
 152     UINT64                  *Value,
 153     void                    *HandlerContext,
 154     void                    *RegionContext)
 155 {
 156     ACPI_STATUS             Status = AE_OK;
 157     void                    *LogicalAddrPtr = NULL;
 158     ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
 159     UINT32                  Length;
 160     ACPI_SIZE               MapLength;
 161     ACPI_SIZE               PageBoundaryMapLength;
 162 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
 163     UINT32                  Remainder;
 164 #endif
 165
 166
 167     ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
 168
 169
 170     /* Validate and translate the bit width */
 171
 172     switch (BitWidth)
 173     {
 174     case 8:
 175         Length = 1;
 176         break;
 177
 178     case 16:
 179         Length = 2;
 180         break;
 181
 182     case 32:
 183         Length = 4;
 184         break;
 185
 186     case 64:
 187         Length = 8;
 188         break;
 189
 190     default:
 191         ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
 192             BitWidth));
 193         return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
 194     }
 195
 196 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
 197     /*
 198      * Hardware does not support non-aligned data transfers, we must verify
 199      * the request.
 200      */
 201     (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
 202     if (Remainder != 0)
 203     {
 204         return_ACPI_STATUS (AE_AML_ALIGNMENT);
 205     }
 206 #endif
 207
 208     /*
 209      * Does the request fit into the cached memory mapping?
 210      * Is 1) Address below the current mapping? OR
 211      *    2) Address beyond the current mapping?
 212      */
 213     if ((Address < MemInfo->MappedPhysicalAddress) ||
 214         (((UINT64) Address + Length) >
 215             ((UINT64)
 216             MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
 217     {
 218         /*
 219          * The request cannot be resolved by the current memory mapping;
 220          * Delete the existing mapping and create a new one.
 221          */
 222         if (MemInfo->MappedLength)
 223         {
 224             /* Valid mapping, delete it */
 225
 226             AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
 227                 MemInfo->MappedLength);
 228         }
 229
 230         /*
 231          * October 2009: Attempt to map from the requested address to the
 232          * end of the region. However, we will never map more than one
 233          * page, nor will we cross a page boundary.
 234          */
 235         MapLength = (ACPI_SIZE)
 236             ((MemInfo->Address + MemInfo->Length) - Address);
 237
 238         /*
 239          * If mapping the entire remaining portion of the region will cross
 240          * a page boundary, just map up to the page boundary, do not cross.
 241          * On some systems, crossing a page boundary while mapping regions
 242          * can cause warnings if the pages have different attributes
 243          * due to resource management.
 244          *
 245          * This has the added benefit of constraining a single mapping to
 246          * one page, which is similar to the original code that used a 4k
 247          * maximum window.
 248          */
 249         PageBoundaryMapLength =
 250             ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address;
 251         if (PageBoundaryMapLength == 0)
 252         {
 253             PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
 254         }
 255
 256         if (MapLength > PageBoundaryMapLength)
 257         {
 258             MapLength = PageBoundaryMapLength;
 259         }
 260
 261         /* Create a new mapping starting at the address given */
 262
 263         MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
 264             (ACPI_PHYSICAL_ADDRESS) Address, MapLength);
 265         if (!MemInfo->MappedLogicalAddress)
 266         {
 267             ACPI_ERROR ((AE_INFO,
 268                 "Could not map memory at 0x%8.8X%8.8X, size %u",
 269                 ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) MapLength));
 270             MemInfo->MappedLength = 0;
 271             return_ACPI_STATUS (AE_NO_MEMORY);
 272         }
 273
 274         /* Save the physical address and mapping size */
 275
 276         MemInfo->MappedPhysicalAddress = Address;
 277         MemInfo->MappedLength = MapLength;
 278     }
 279
 280     /*
 281      * Generate a logical pointer corresponding to the address we want to
 282      * access
 283      */
 284     LogicalAddrPtr = MemInfo->MappedLogicalAddress +
 285         ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);
 286
 287     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 288         "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
 289         BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
 290
 291     /*
 292      * Perform the memory read or write
 293      *
 294      * Note: For machines that do not support non-aligned transfers, the target
 295      * address was checked for alignment above.  We do not attempt to break the
 296      * transfer up into smaller (byte-size) chunks because the AML specifically
 297      * asked for a transfer width that the hardware may require.
 298      */
 299     switch (Function)
 300     {
 301     case ACPI_READ:
 302
 303         *Value = 0;
 304         switch (BitWidth)
 305         {
 306         case 8:
 307             *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
 308             break;
 309
 310         case 16:
 311             *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
 312             break;
 313
 314         case 32:
 315             *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
 316             break;
 317
 318         case 64:
 319             *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
 320             break;
 321
 322         default:
 323             /* BitWidth was already validated */
 324             break;
 325         }
 326         break;
 327
 328     case ACPI_WRITE:
 329
 330         switch (BitWidth)
 331         {
 332         case 8:
 333             ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;
 334             break;
 335
 336         case 16:
 337             ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;
 338             break;
 339
 340         case 32:
 341             ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;
 342             break;
 343
 344         case 64:
 345             ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;
 346             break;
 347
 348         default:
 349             /* BitWidth was already validated */
 350             break;
 351         }
 352         break;
 353
 354     default:
 355         Status = AE_BAD_PARAMETER;
 356         break;
 357     }
 358
 359     return_ACPI_STATUS (Status);
 360 }
 361
 362
 363 /*******************************************************************************
 364  *
 365  * FUNCTION:    AcpiExSystemIoSpaceHandler
 366  *
 367  * PARAMETERS:  Function            - Read or Write operation
 368  *              Address             - Where in the space to read or write
 369  *              BitWidth            - Field width in bits (8, 16, or 32)
 370  *              Value               - Pointer to in or out value
 371  *              HandlerContext      - Pointer to Handler's context
 372  *              RegionContext       - Pointer to context specific to the
 373  *                                    accessed region
 374  *
 375  * RETURN:      Status
 376  *
 377  * DESCRIPTION: Handler for the System IO address space (Op Region)
 378  *
 379  ******************************************************************************/
 380
 381 ACPI_STATUS
 382 AcpiExSystemIoSpaceHandler (
 383     UINT32                  Function,
 384     ACPI_PHYSICAL_ADDRESS   Address,
 385     UINT32                  BitWidth,
 386     UINT64                  *Value,
 387     void                    *HandlerContext,
 388     void                    *RegionContext)
 389 {
 390     ACPI_STATUS             Status = AE_OK;
 391     UINT32                  Value32;
 392
 393
 394     ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
 395
 396
 397     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 398         "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
 399         BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));
 400
 401     /* Decode the function parameter */
 402
 403     switch (Function)
 404     {
 405     case ACPI_READ:
 406
 407         Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
 408                     &Value32, BitWidth);
 409         *Value = Value32;
 410         break;
 411
 412     case ACPI_WRITE:
 413
 414         Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
 415                     (UINT32) *Value, BitWidth);
 416         break;
 417
 418     default:
 419         Status = AE_BAD_PARAMETER;
 420         break;
 421     }
 422
 423     return_ACPI_STATUS (Status);
 424 }
 425
 426
 427 /*******************************************************************************
 428  *
 429  * FUNCTION:    AcpiExPciConfigSpaceHandler
 430  *
 431  * PARAMETERS:  Function            - Read or Write operation
 432  *              Address             - Where in the space to read or write
 433  *              BitWidth            - Field width in bits (8, 16, or 32)
 434  *              Value               - Pointer to in or out value
 435  *              HandlerContext      - Pointer to Handler's context
 436  *              RegionContext       - Pointer to context specific to the
 437  *                                    accessed region
 438  *
 439  * RETURN:      Status
 440  *
 441  * DESCRIPTION: Handler for the PCI Config address space (Op Region)
 442  *
 443  ******************************************************************************/
 444
 445 ACPI_STATUS
 446 AcpiExPciConfigSpaceHandler (
 447     UINT32                  Function,
 448     ACPI_PHYSICAL_ADDRESS   Address,
 449     UINT32                  BitWidth,
 450     UINT64                  *Value,
 451     void                    *HandlerContext,
 452     void                    *RegionContext)
 453 {
 454     ACPI_STATUS             Status = AE_OK;
 455     ACPI_PCI_ID             *PciId;
 456     UINT16                  PciRegister;
 457
 458
 459     ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
 460
 461
 462     /*
 463      *  The arguments to AcpiOs(Read|Write)PciConfiguration are:
 464      *
 465      *  PciSegment  is the PCI bus segment range 0-31
 466      *  PciBus      is the PCI bus number range 0-255
 467      *  PciDevice   is the PCI device number range 0-31
 468      *  PciFunction is the PCI device function number
 469      *  PciRegister is the Config space register range 0-255 bytes
 470      *
 471      *  Value - input value for write, output address for read
 472      *
 473      */
 474     PciId       = (ACPI_PCI_ID *) RegionContext;
 475     PciRegister = (UINT16) (UINT32) Address;
 476
 477     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 478         "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
 479         Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
 480         PciId->Function, PciRegister));
 481
 482     switch (Function)
 483     {
 484     case ACPI_READ:
 485
 486         *Value = 0;
 487         Status = AcpiOsReadPciConfiguration (PciId, PciRegister,
 488                     Value, BitWidth);
 489         break;
 490
 491     case ACPI_WRITE:
 492
 493         Status = AcpiOsWritePciConfiguration (PciId, PciRegister,
 494                     *Value, BitWidth);
 495         break;
 496
 497     default:
 498
 499         Status = AE_BAD_PARAMETER;
 500         break;
 501     }
 502
 503     return_ACPI_STATUS (Status);
 504 }
 505
 506
 507 /*******************************************************************************
 508  *
 509  * FUNCTION:    AcpiExCmosSpaceHandler
 510  *
 511  * PARAMETERS:  Function            - Read or Write operation
 512  *              Address             - Where in the space to read or write
 513  *              BitWidth            - Field width in bits (8, 16, or 32)
 514  *              Value               - Pointer to in or out value
 515  *              HandlerContext      - Pointer to Handler's context
 516  *              RegionContext       - Pointer to context specific to the
 517  *                                    accessed region
 518  *
 519  * RETURN:      Status
 520  *
 521  * DESCRIPTION: Handler for the CMOS address space (Op Region)
 522  *
 523  ******************************************************************************/
 524
 525 ACPI_STATUS
 526 AcpiExCmosSpaceHandler (
 527     UINT32                  Function,
 528     ACPI_PHYSICAL_ADDRESS   Address,
 529     UINT32                  BitWidth,
 530     UINT64                  *Value,
 531     void                    *HandlerContext,
 532     void                    *RegionContext)
 533 {
 534     ACPI_STATUS             Status = AE_OK;
 535
 536
 537     ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
 538
 539
 540     return_ACPI_STATUS (Status);
 541 }
 542
 543
 544 /*******************************************************************************
 545  *
 546  * FUNCTION:    AcpiExPciBarSpaceHandler
 547  *
 548  * PARAMETERS:  Function            - Read or Write operation
 549  *              Address             - Where in the space to read or write
 550  *              BitWidth            - Field width in bits (8, 16, or 32)
 551  *              Value               - Pointer to in or out value
 552  *              HandlerContext      - Pointer to Handler's context
 553  *              RegionContext       - Pointer to context specific to the
 554  *                                    accessed region
 555  *
 556  * RETURN:      Status
 557  *
 558  * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
 559  *
 560  ******************************************************************************/
 561
 562 ACPI_STATUS
 563 AcpiExPciBarSpaceHandler (
 564     UINT32                  Function,
 565     ACPI_PHYSICAL_ADDRESS   Address,
 566     UINT32                  BitWidth,
 567     UINT64                  *Value,
 568     void                    *HandlerContext,
 569     void                    *RegionContext)
 570 {
 571     ACPI_STATUS             Status = AE_OK;
 572
 573
 574     ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
 575
 576
 577     return_ACPI_STATUS (Status);
 578 }
 579
 580
 581 /*******************************************************************************
 582  *
 583  * FUNCTION:    AcpiExDataTableSpaceHandler
 584  *
 585  * PARAMETERS:  Function            - Read or Write operation
 586  *              Address             - Where in the space to read or write
 587  *              BitWidth            - Field width in bits (8, 16, or 32)
 588  *              Value               - Pointer to in or out value
 589  *              HandlerContext      - Pointer to Handler's context
 590  *              RegionContext       - Pointer to context specific to the
 591  *                                    accessed region
 592  *
 593  * RETURN:      Status
 594  *
 595  * DESCRIPTION: Handler for the Data Table address space (Op Region)
 596  *
 597  ******************************************************************************/
 598
 599 ACPI_STATUS
 600 AcpiExDataTableSpaceHandler (
 601     UINT32                  Function,
 602     ACPI_PHYSICAL_ADDRESS   Address,
 603     UINT32                  BitWidth,
 604     UINT64                  *Value,
 605     void                    *HandlerContext,
 606     void                    *RegionContext)
 607 {
 608     ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
 609
 610
 611     /*
 612      * Perform the memory read or write. The BitWidth was already
 613      * validated.
 614      */
 615     switch (Function)
 616     {
 617     case ACPI_READ:
 618
 619         ACPI_MEMCPY (ACPI_CAST_PTR (char, Value), ACPI_PHYSADDR_TO_PTR (Address),
 620             ACPI_DIV_8 (BitWidth));
 621         break;
 622
 623     case ACPI_WRITE:
 624
 625         ACPI_MEMCPY (ACPI_PHYSADDR_TO_PTR (Address), ACPI_CAST_PTR (char, Value),
 626             ACPI_DIV_8 (BitWidth));
 627         break;
 628
 629     default:
 630
 631         return_ACPI_STATUS (AE_BAD_PARAMETER);
 632     }
 633
 634     return_ACPI_STATUS (AE_OK);
 635 }
 636
 637