acpica/executer/exregion.c

0001 /******************************************************************************
0002  *
0003  * Module Name: exregion - ACPI default OpRegion (address space) handlers
0004  *
0005  *****************************************************************************/
0006
0007 /******************************************************************************
0008  *
0009  * 1. Copyright Notice
0010  *
0011  * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
0012  * All rights reserved.
0013  *
0014  * 2. License
0015  *
0016  * 2.1. This is your license from Intel Corp. under its intellectual property
0017  * rights. You may have additional license terms from the party that provided
0018  * you this software, covering your right to use that party's intellectual
0019  * property rights.
0020  *
0021  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
0022  * copy of the source code appearing in this file ("Covered Code") an
0023  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
0024  * base code distributed originally by Intel ("Original Intel Code") to copy,
0025  * make derivatives, distribute, use and display any portion of the Covered
0026  * Code in any form, with the right to sublicense such rights; and
0027  *
0028  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
0029  * license (with the right to sublicense), under only those claims of Intel
0030  * patents that are infringed by the Original Intel Code, to make, use, sell,
0031  * offer to sell, and import the Covered Code and derivative works thereof
0032  * solely to the minimum extent necessary to exercise the above copyright
0033  * license, and in no event shall the patent license extend to any additions
0034  * to or modifications of the Original Intel Code. No other license or right
0035  * is granted directly or by implication, estoppel or otherwise;
0036  *
0037  * The above copyright and patent license is granted only if the following
0038  * conditions are met:
0039  *
0040  * 3. Conditions
0041  *
0042  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
0043  * Redistribution of source code of any substantial portion of the Covered
0044  * Code or modification with rights to further distribute source must include
0045  * the above Copyright Notice, the above License, this list of Conditions,
0046  * and the following Disclaimer and Export Compliance provision. In addition,
0047  * Licensee must cause all Covered Code to which Licensee contributes to
0048  * contain a file documenting the changes Licensee made to create that Covered
0049  * Code and the date of any change. Licensee must include in that file the
0050  * documentation of any changes made by any predecessor Licensee. Licensee
0051  * must include a prominent statement that the modification is derived,
0052  * directly or indirectly, from Original Intel Code.
0053  *
0054  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
0055  * Redistribution of source code of any substantial portion of the Covered
0056  * Code or modification without rights to further distribute source must
0057  * include the following Disclaimer and Export Compliance provision in the
0058  * documentation and/or other materials provided with distribution. In
0059  * addition, Licensee may not authorize further sublicense of source of any
0060  * portion of the Covered Code, and must include terms to the effect that the
0061  * license from Licensee to its licensee is limited to the intellectual
0062  * property embodied in the software Licensee provides to its licensee, and
0063  * not to intellectual property embodied in modifications its licensee may
0064  * make.
0065  *
0066  * 3.3. Redistribution of Executable. Redistribution in executable form of any
0067  * substantial portion of the Covered Code or modification must reproduce the
0068  * above Copyright Notice, and the following Disclaimer and Export Compliance
0069  * provision in the documentation and/or other materials provided with the
0070  * distribution.
0071  *
0072  * 3.4. Intel retains all right, title, and interest in and to the Original
0073  * Intel Code.
0074  *
0075  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
0076  * Intel shall be used in advertising or otherwise to promote the sale, use or
0077  * other dealings in products derived from or relating to the Covered Code
0078  * without prior written authorization from Intel.
0079  *
0080  * 4. Disclaimer and Export Compliance
0081  *
0082  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
0083  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
0084  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
0085  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
0086  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
0087  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
0088  * PARTICULAR PURPOSE.
0089  *
0090  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
0091  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
0092  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
0093  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
0094  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
0095  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
0096  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
0097  * LIMITED REMEDY.
0098  *
0099  * 4.3. Licensee shall not export, either directly or indirectly, any of this
0100  * software or system incorporating such software without first obtaining any
0101  * required license or other approval from the U. S. Department of Commerce or
0102  * any other agency or department of the United States Government. In the
0103  * event Licensee exports any such software from the United States or
0104  * re-exports any such software from a foreign destination, Licensee shall
0105  * ensure that the distribution and export/re-export of the software is in
0106  * compliance with all laws, regulations, orders, or other restrictions of the
0107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
0108  * any of its subsidiaries will export/re-export any technical data, process,
0109  * software, or service, directly or indirectly, to any country for which the
0110  * United States government or any agency thereof requires an export license,
0111  * other governmental approval, or letter of assurance, without first obtaining
0112  * such license, approval or letter.
0113  *
0114  *****************************************************************************
0115  *
0116  * Alternatively, you may choose to be licensed under the terms of the
0117  * following license:
0118  *
0119  * Redistribution and use in source and binary forms, with or without
0120  * modification, are permitted provided that the following conditions
0121  * are met:
0122  * 1. Redistributions of source code must retain the above copyright
0123  *    notice, this list of conditions, and the following disclaimer,
0124  *    without modification.
0125  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
0126  *    substantially similar to the "NO WARRANTY" disclaimer below
0127  *    ("Disclaimer") and any redistribution must be conditioned upon
0128  *    including a substantially similar Disclaimer requirement for further
0129  *    binary redistribution.
0130  * 3. Neither the names of the above-listed copyright holders nor the names
0131  *    of any contributors may be used to endorse or promote products derived
0132  *    from this software without specific prior written permission.
0133  *
0134  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
0135  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
0136  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
0137  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
0138  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
0139  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
0140  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
0141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
0142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
0144  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0145  *
0146  * Alternatively, you may choose to be licensed under the terms of the
0147  * GNU General Public License ("GPL") version 2 as published by the Free
0148  * Software Foundation.
0149  *
0150  *****************************************************************************/
0151
0152 #include "acpi.h"
0153 #include "accommon.h"
0154 #include "acinterp.h"
0155
0156
0157 #define _COMPONENT          ACPI_EXECUTER
0158         ACPI_MODULE_NAME    ("exregion")
0159
0160
0161 /*******************************************************************************
0162  *
0163  * FUNCTION:    AcpiExSystemMemorySpaceHandler
0164  *
0165  * PARAMETERS:  Function            - Read or Write operation
0166  *              Address             - Where in the space to read or write
0167  *              BitWidth            - Field width in bits (8, 16, or 32)
0168  *              Value               - Pointer to in or out value
0169  *              HandlerContext      - Pointer to Handler's context
0170  *              RegionContext       - Pointer to context specific to the
0171  *                                    accessed region
0172  *
0173  * RETURN:      Status
0174  *
0175  * DESCRIPTION: Handler for the System Memory address space (Op Region)
0176  *
0177  ******************************************************************************/
0178
0179 ACPI_STATUS
0180 AcpiExSystemMemorySpaceHandler (
0181     UINT32                  Function,
0182     ACPI_PHYSICAL_ADDRESS   Address,
0183     UINT32                  BitWidth,
0184     UINT64                  *Value,
0185     void                    *HandlerContext,
0186     void                    *RegionContext)
0187 {
0188     ACPI_STATUS             Status = AE_OK;
0189     void                    *LogicalAddrPtr = NULL;
0190     ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
0191     ACPI_MEM_MAPPING        *Mm = MemInfo->CurMm;
0192     UINT32                  Length;
0193     ACPI_SIZE               MapLength;
0194 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
0195     UINT32                  Remainder;
0196 #endif
0197
0198
0199     ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
0200
0201
0202     /* Validate and translate the bit width */
0203
0204     switch (BitWidth)
0205     {
0206     case 8:
0207
0208         Length = 1;
0209         break;
0210
0211     case 16:
0212
0213         Length = 2;
0214         break;
0215
0216     case 32:
0217
0218         Length = 4;
0219         break;
0220
0221     case 64:
0222
0223         Length = 8;
0224         break;
0225
0226     default:
0227
0228         ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
0229             BitWidth));
0230         return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
0231     }
0232
0233 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
0234     /*
0235      * Hardware does not support non-aligned data transfers, we must verify
0236      * the request.
0237      */
0238     (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
0239     if (Remainder != 0)
0240     {
0241         return_ACPI_STATUS (AE_AML_ALIGNMENT);
0242     }
0243 #endif
0244
0245     /*
0246      * Does the request fit into the cached memory mapping?
0247      * Is 1) Address below the current mapping? OR
0248      *    2) Address beyond the current mapping?
0249      */
0250     if (!Mm || (Address < Mm->PhysicalAddress) ||
0251         ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length))
0252     {
0253         /*
0254          * The request cannot be resolved by the current memory mapping.
0255          *
0256          * Look for an existing saved mapping covering the address range
0257          * at hand. If found, save it as the current one and carry out
0258          * the access.
0259          */
0260         for (Mm = MemInfo->FirstMm; Mm; Mm = Mm->NextMm)
0261         {
0262             if (Mm == MemInfo->CurMm)
0263             {
0264                 continue;
0265             }
0266
0267             if (Address < Mm->PhysicalAddress)
0268             {
0269                 continue;
0270             }
0271
0272             if ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length)
0273             {
0274                 continue;
0275             }
0276
0277             MemInfo->CurMm = Mm;
0278             goto access;
0279         }
0280
0281         /* Create a new mappings list entry */
0282
0283         Mm = ACPI_ALLOCATE_ZEROED(sizeof(*Mm));
0284         if (!Mm)
0285         {
0286             ACPI_ERROR((AE_INFO,
0287                 "Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
0288                 ACPI_FORMAT_UINT64(Address), Length));
0289             return_ACPI_STATUS(AE_NO_MEMORY);
0290         }
0291
0292         /*
0293          * October 2009: Attempt to map from the requested address to the
0294          * end of the region. However, we will never map more than one
0295          * page, nor will we cross a page boundary.
0296          */
0297         MapLength = (ACPI_SIZE)
0298             ((MemInfo->Address + MemInfo->Length) - Address);
0299
0300         if (MapLength > ACPI_DEFAULT_PAGE_SIZE)
0301         {
0302             MapLength = ACPI_DEFAULT_PAGE_SIZE;
0303         }
0304
0305         /* Create a new mapping starting at the address given */
0306
0307         LogicalAddrPtr = AcpiOsMapMemory(Address, MapLength);
0308         if (!LogicalAddrPtr)
0309         {
0310             ACPI_ERROR ((AE_INFO,
0311                 "Could not map memory at 0x%8.8X%8.8X, size %u",
0312                 ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
0313             ACPI_FREE(Mm);
0314             return_ACPI_STATUS (AE_NO_MEMORY);
0315         }
0316
0317         /* Save the physical address and mapping size */
0318
0319         Mm->LogicalAddress = LogicalAddrPtr;
0320         Mm->PhysicalAddress = Address;
0321         Mm->Length = MapLength;
0322
0323         /*
0324          * Add the new entry to the mappigs list and save it as the
0325          * current mapping.
0326          */
0327         Mm->NextMm = MemInfo->FirstMm;
0328         MemInfo->FirstMm = Mm;
0329         MemInfo->CurMm = Mm;
0330     }
0331
0332 access:
0333     /*
0334      * Generate a logical pointer corresponding to the address we want to
0335      * access
0336      */
0337     LogicalAddrPtr = Mm->LogicalAddress +
0338         ((UINT64) Address - (UINT64) Mm->PhysicalAddress);
0339
0340     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
0341         "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
0342         BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
0343
0344     /*
0345      * Perform the memory read or write
0346      *
0347      * Note: For machines that do not support non-aligned transfers, the target
0348      * address was checked for alignment above. We do not attempt to break the
0349      * transfer up into smaller (byte-size) chunks because the AML specifically
0350      * asked for a transfer width that the hardware may require.
0351      */
0352     switch (Function)
0353     {
0354     case ACPI_READ:
0355
0356         *Value = 0;
0357         switch (BitWidth)
0358         {
0359         case 8:
0360
0361             *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
0362             break;
0363
0364         case 16:
0365
0366             *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
0367             break;
0368
0369         case 32:
0370
0371             *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
0372             break;
0373
0374         case 64:
0375
0376             *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
0377             break;
0378
0379         default:
0380
0381             /* BitWidth was already validated */
0382
0383             break;
0384         }
0385         break;
0386
0387     case ACPI_WRITE:
0388
0389         switch (BitWidth)
0390         {
0391         case 8:
0392
0393             ACPI_SET8 (LogicalAddrPtr, *Value);
0394             break;
0395
0396         case 16:
0397
0398             ACPI_SET16 (LogicalAddrPtr, *Value);
0399             break;
0400
0401         case 32:
0402
0403             ACPI_SET32 (LogicalAddrPtr, *Value);
0404             break;
0405
0406         case 64:
0407
0408             ACPI_SET64 (LogicalAddrPtr, *Value);
0409             break;
0410
0411         default:
0412
0413             /* BitWidth was already validated */
0414
0415             break;
0416         }
0417         break;
0418
0419     default:
0420
0421         Status = AE_BAD_PARAMETER;
0422         break;
0423     }
0424
0425     return_ACPI_STATUS (Status);
0426 }
0427
0428
0429 /*******************************************************************************
0430  *
0431  * FUNCTION:    AcpiExSystemIoSpaceHandler
0432  *
0433  * PARAMETERS:  Function            - Read or Write operation
0434  *              Address             - Where in the space to read or write
0435  *              BitWidth            - Field width in bits (8, 16, or 32)
0436  *              Value               - Pointer to in or out value
0437  *              HandlerContext      - Pointer to Handler's context
0438  *              RegionContext       - Pointer to context specific to the
0439  *                                    accessed region
0440  *
0441  * RETURN:      Status
0442  *
0443  * DESCRIPTION: Handler for the System IO address space (Op Region)
0444  *
0445  ******************************************************************************/
0446
0447 ACPI_STATUS
0448 AcpiExSystemIoSpaceHandler (
0449     UINT32                  Function,
0450     ACPI_PHYSICAL_ADDRESS   Address,
0451     UINT32                  BitWidth,
0452     UINT64                  *Value,
0453     void                    *HandlerContext,
0454     void                    *RegionContext)
0455 {
0456     ACPI_STATUS             Status = AE_OK;
0457     UINT32                  Value32;
0458
0459
0460     ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
0461
0462
0463     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
0464         "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
0465         BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
0466
0467     /* Decode the function parameter */
0468
0469     switch (Function)
0470     {
0471     case ACPI_READ:
0472
0473         Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
0474                     &Value32, BitWidth);
0475         *Value = Value32;
0476         break;
0477
0478     case ACPI_WRITE:
0479
0480         Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
0481                     (UINT32) *Value, BitWidth);
0482         break;
0483
0484     default:
0485
0486         Status = AE_BAD_PARAMETER;
0487         break;
0488     }
0489
0490     return_ACPI_STATUS (Status);
0491 }
0492
0493
0494 /*******************************************************************************
0495  *
0496  * FUNCTION:    AcpiExPciConfigSpaceHandler
0497  *
0498  * PARAMETERS:  Function            - Read or Write operation
0499  *              Address             - Where in the space to read or write
0500  *              BitWidth            - Field width in bits (8, 16, or 32)
0501  *              Value               - Pointer to in or out value
0502  *              HandlerContext      - Pointer to Handler's context
0503  *              RegionContext       - Pointer to context specific to the
0504  *                                    accessed region
0505  *
0506  * RETURN:      Status
0507  *
0508  * DESCRIPTION: Handler for the PCI Config address space (Op Region)
0509  *
0510  ******************************************************************************/
0511
0512 ACPI_STATUS
0513 AcpiExPciConfigSpaceHandler (
0514     UINT32                  Function,
0515     ACPI_PHYSICAL_ADDRESS   Address,
0516     UINT32                  BitWidth,
0517     UINT64                  *Value,
0518     void                    *HandlerContext,
0519     void                    *RegionContext)
0520 {
0521     ACPI_STATUS             Status = AE_OK;
0522     ACPI_PCI_ID             *PciId;
0523     UINT16                  PciRegister;
0524
0525
0526     ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
0527
0528
0529     /*
0530      *  The arguments to AcpiOs(Read|Write)PciConfiguration are:
0531      *
0532      *  PciSegment  is the PCI bus segment range 0-31
0533      *  PciBus      is the PCI bus number range 0-255
0534      *  PciDevice   is the PCI device number range 0-31
0535      *  PciFunction is the PCI device function number
0536      *  PciRegister is the Config space register range 0-255 bytes
0537      *
0538      *  Value - input value for write, output address for read
0539      *
0540      */
0541     PciId       = (ACPI_PCI_ID *) RegionContext;
0542     PciRegister = (UINT16) (UINT32) Address;
0543
0544     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
0545         "Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
0546         "Dev(%04x) Func(%04x) Reg(%04x)\n",
0547         Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
0548         PciId->Function, PciRegister));
0549
0550     switch (Function)
0551     {
0552     case ACPI_READ:
0553
0554         *Value = 0;
0555         Status = AcpiOsReadPciConfiguration (
0556             PciId, PciRegister, Value, BitWidth);
0557         break;
0558
0559     case ACPI_WRITE:
0560
0561         Status = AcpiOsWritePciConfiguration (
0562             PciId, PciRegister, *Value, BitWidth);
0563         break;
0564
0565     default:
0566
0567         Status = AE_BAD_PARAMETER;
0568         break;
0569     }
0570
0571     return_ACPI_STATUS (Status);
0572 }
0573
0574
0575 /*******************************************************************************
0576  *
0577  * FUNCTION:    AcpiExCmosSpaceHandler
0578  *
0579  * PARAMETERS:  Function            - Read or Write operation
0580  *              Address             - Where in the space to read or write
0581  *              BitWidth            - Field width in bits (8, 16, or 32)
0582  *              Value               - Pointer to in or out value
0583  *              HandlerContext      - Pointer to Handler's context
0584  *              RegionContext       - Pointer to context specific to the
0585  *                                    accessed region
0586  *
0587  * RETURN:      Status
0588  *
0589  * DESCRIPTION: Handler for the CMOS address space (Op Region)
0590  *
0591  ******************************************************************************/
0592
0593 ACPI_STATUS
0594 AcpiExCmosSpaceHandler (
0595     UINT32                  Function,
0596     ACPI_PHYSICAL_ADDRESS   Address,
0597     UINT32                  BitWidth,
0598     UINT64                  *Value,
0599     void                    *HandlerContext,
0600     void                    *RegionContext)
0601 {
0602     ACPI_STATUS             Status = AE_OK;
0603
0604
0605     ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
0606
0607
0608     return_ACPI_STATUS (Status);
0609 }
0610
0611
0612 /*******************************************************************************
0613  *
0614  * FUNCTION:    AcpiExPciBarSpaceHandler
0615  *
0616  * PARAMETERS:  Function            - Read or Write operation
0617  *              Address             - Where in the space to read or write
0618  *              BitWidth            - Field width in bits (8, 16, or 32)
0619  *              Value               - Pointer to in or out value
0620  *              HandlerContext      - Pointer to Handler's context
0621  *              RegionContext       - Pointer to context specific to the
0622  *                                    accessed region
0623  *
0624  * RETURN:      Status
0625  *
0626  * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
0627  *
0628  ******************************************************************************/
0629
0630 ACPI_STATUS
0631 AcpiExPciBarSpaceHandler (
0632     UINT32                  Function,
0633     ACPI_PHYSICAL_ADDRESS   Address,
0634     UINT32                  BitWidth,
0635     UINT64                  *Value,
0636     void                    *HandlerContext,
0637     void                    *RegionContext)
0638 {
0639     ACPI_STATUS             Status = AE_OK;
0640
0641
0642     ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
0643
0644
0645     return_ACPI_STATUS (Status);
0646 }
0647
0648
0649 /*******************************************************************************
0650  *
0651  * FUNCTION:    AcpiExDataTableSpaceHandler
0652  *
0653  * PARAMETERS:  Function            - Read or Write operation
0654  *              Address             - Where in the space to read or write
0655  *              BitWidth            - Field width in bits (8, 16, or 32)
0656  *              Value               - Pointer to in or out value
0657  *              HandlerContext      - Pointer to Handler's context
0658  *              RegionContext       - Pointer to context specific to the
0659  *                                    accessed region
0660  *
0661  * RETURN:      Status
0662  *
0663  * DESCRIPTION: Handler for the Data Table address space (Op Region)
0664  *
0665  ******************************************************************************/
0666
0667 ACPI_STATUS
0668 AcpiExDataTableSpaceHandler (
0669     UINT32                  Function,
0670     ACPI_PHYSICAL_ADDRESS   Address,
0671     UINT32                  BitWidth,
0672     UINT64                  *Value,
0673     void                    *HandlerContext,
0674     void                    *RegionContext)
0675 {
0676     ACPI_DATA_TABLE_MAPPING *Mapping;
0677     char                    *Pointer;
0678
0679
0680     ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
0681
0682
0683     Mapping = (ACPI_DATA_TABLE_MAPPING *) RegionContext;
0684     Pointer = ACPI_CAST_PTR (char, Mapping->Pointer) +
0685         (Address - ACPI_PTR_TO_PHYSADDR (Mapping->Pointer));
0686
0687     /*
0688      * Perform the memory read or write. The BitWidth was already
0689      * validated.
0690      */
0691     switch (Function)
0692     {
0693     case ACPI_READ:
0694
0695         memcpy (ACPI_CAST_PTR (char, Value), Pointer, ACPI_DIV_8 (BitWidth));
0696         break;
0697
0698     case ACPI_WRITE:
0699
0700         memcpy (Pointer, ACPI_CAST_PTR (char, Value), ACPI_DIV_8 (BitWidth));
0701         break;
0702
0703     default:
0704
0705         return_ACPI_STATUS (AE_BAD_PARAMETER);
0706     }
0707
0708     return_ACPI_STATUS (AE_OK);
0709 }