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 *

 * Module Name: exregion - ACPI default OpRegion (address space) handlers

 *

 *****************************************************************************/

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.

 * All rights reserved.

 *

 * 2. License

 *

 * 2.1. This is your license from Intel Corp. under its intellectual property

 * rights.  You may have additional license terms from the party that provided

 * you this software, covering your right to use that party's intellectual

 * property rights.

 *

 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a

 * copy of the source code appearing in this file ("Covered Code") an

 * irrevocable, perpetual, worldwide license under Intel's copyrights in the

 * base code distributed originally by Intel ("Original Intel Code") to copy,

 * make derivatives, distribute, use and display any portion of the Covered

 * Code in any form, with the right to sublicense such rights; and

 *

 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent

 * license (with the right to sublicense), under only those claims of Intel

 * patents that are infringed by the Original Intel Code, to make, use, sell,

 * offer to sell, and import the Covered Code and derivative works thereof

 * solely to the minimum extent necessary to exercise the above copyright

 * license, and in no event shall the patent license extend to any additions

 * to or modifications of the Original Intel Code.  No other license or right

 * is granted directly or by implication, estoppel or otherwise;

 *

 * The above copyright and patent license is granted only if the following

 * conditions are met:

 *

 * 3. Conditions

 *

 * 3.1. Redistribution of Source with Rights to Further Distribute Source.

 * Redistribution of source code of any substantial portion of the Covered

 * Code or modification with rights to further distribute source must include

 * the above Copyright Notice, the above License, this list of Conditions,

 * and the following Disclaimer and Export Compliance provision.  In addition,

 * Licensee must cause all Covered Code to which Licensee contributes to

 * contain a file documenting the changes Licensee made to create that Covered

 * Code and the date of any change.  Licensee must include in that file the

 * documentation of any changes made by any predecessor Licensee.  Licensee

 * must include a prominent statement that the modification is derived,

 * directly or indirectly, from Original Intel Code.

 *

 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.

 * Redistribution of source code of any substantial portion of the Covered

 * Code or modification without rights to further distribute source must

 * include the following Disclaimer and Export Compliance provision in the

 * documentation and/or other materials provided with distribution.  In

 * addition, Licensee may not authorize further sublicense of source of any

 * portion of the Covered Code, and must include terms to the effect that the

 * license from Licensee to its licensee is limited to the intellectual

 * property embodied in the software Licensee provides to its licensee, and

 * not to intellectual property embodied in modifications its licensee may

 * make.

 *

 * 3.3. Redistribution of Executable. Redistribution in executable form of any

 * substantial portion of the Covered Code or modification must reproduce the

 * above Copyright Notice, and the following Disclaimer and Export Compliance

 * provision in the documentation and/or other materials provided with the

 * distribution.

 *

 * 3.4. Intel retains all right, title, and interest in and to the Original

 * Intel Code.

 *

 * 3.5. Neither the name Intel nor any other trademark owned or controlled by

 * Intel shall be used in advertising or otherwise to promote the sale, use or

 * other dealings in products derived from or relating to the Covered Code

 * without prior written authorization from Intel.

 *

 * 4. Disclaimer and Export Compliance

 *

 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED

 * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE

 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,

 * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY

 * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY

 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A

 * PARTICULAR PURPOSE.

 *

 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES

 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR

 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,

 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY

 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL

 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS

 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY

 * LIMITED REMEDY.

 *

 * 4.3. Licensee shall not export, either directly or indirectly, any of this

 * software or system incorporating such software without first obtaining any

 * required license or other approval from the U. S. Department of Commerce or

 * any other agency or department of the United States Government.  In the

 * event Licensee exports any such software from the United States or

 * re-exports any such software from a foreign destination, Licensee shall

 * ensure that the distribution and export/re-export of the software is in

 * compliance with all laws, regulations, orders, or other restrictions of the

 * U.S. Export Administration Regulations. Licensee agrees that neither it nor

 * any of its subsidiaries will export/re-export any technical data, process,

 * software, or service, directly or indirectly, to any country for which the

 * United States government or any agency thereof requires an export license,

 * other governmental approval, or letter of assurance, without first obtaining

 * such license, approval or letter.

 *

 *****************************************************************************/

#include "accommon.h"

#include "acinterp.h"

        ACPI_MODULE_NAME    ("exregion")

 *

 * FUNCTION:    AcpiExSystemMemorySpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the System Memory address space (Op Region)

 *

 ******************************************************************************/

AcpiExSystemMemorySpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

    void                    *LogicalAddrPtr = NULL;

    ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;

    UINT32                  Length;

    ACPI_SIZE               MapLength;

    ACPI_SIZE               PageBoundaryMapLength;

#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED

    UINT32                  Remainder;

#endif

    {

    case 8:

        Length = 1;

        break;

        Length = 2;

        break;

        Length = 4;

        break;

        Length = 8;

        break;

        ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",

            BitWidth));

        return_ACPI_STATUS (AE_AML_OPERAND_VALUE);

    }

    /*

     * Hardware does not support non-aligned data transfers, we must verify

     * the request.

     */

    (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);

    if (Remainder != 0)

    {

        return_ACPI_STATUS (AE_AML_ALIGNMENT);

    }

#endif

     * Does the request fit into the cached memory mapping?

     * Is 1) Address below the current mapping? OR

     *    2) Address beyond the current mapping?

     */

    if ((Address < MemInfo->MappedPhysicalAddress) ||

        (((UINT64) Address + Length) >

            ((UINT64)

            MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))

    {

        /*

         * The request cannot be resolved by the current memory mapping;

         * Delete the existing mapping and create a new one.

         */

        if (MemInfo->MappedLength)

        {

            /* Valid mapping, delete it */

                MemInfo->MappedLength);

        }

         * October 2009: Attempt to map from the requested address to the

         * end of the region. However, we will never map more than one

         * page, nor will we cross a page boundary.

         */

        MapLength = (ACPI_SIZE)

            ((MemInfo->Address + MemInfo->Length) - Address);

         * If mapping the entire remaining portion of the region will cross

         * a page boundary, just map up to the page boundary, do not cross.

         * On some systems, crossing a page boundary while mapping regions

         * can cause warnings if the pages have different attributes

         * due to resource management.

         *

         * This has the added benefit of constraining a single mapping to

         * one page, which is similar to the original code that used a 4k

         * maximum window.

         */

        PageBoundaryMapLength =

            ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address;

        if (PageBoundaryMapLength == 0)

        {

            PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;

        }

        {

            MapLength = PageBoundaryMapLength;

        }

            (ACPI_PHYSICAL_ADDRESS) Address, MapLength);

        if (!MemInfo->MappedLogicalAddress)

        {

            ACPI_ERROR ((AE_INFO,

                "Could not map memory at 0x%8.8X%8.8X, size %u",

                ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) MapLength));

            MemInfo->MappedLength = 0;

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        MemInfo->MappedLength = MapLength;

    }

     * Generate a logical pointer corresponding to the address we want to

     * access

     */

    LogicalAddrPtr = MemInfo->MappedLogicalAddress +

        ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);

        "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",

        BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));

     * Perform the memory read or write

     *

     * Note: For machines that do not support non-aligned transfers, the target

     * address was checked for alignment above.  We do not attempt to break the

     * transfer up into smaller (byte-size) chunks because the AML specifically

     * asked for a transfer width that the hardware may require.

     */

    switch (Function)

    {

    case ACPI_READ:

        switch (BitWidth)

        {

        case 8:

            *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);

            break;

            *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);

            break;

            *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);

            break;

            *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);

            break;

            /* BitWidth was already validated */

            break;

        }

        break;

        {

        case 8:

            ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;

            break;

            ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;

            break;

            ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;

            break;

            ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;

            break;

            /* BitWidth was already validated */

            break;

        }

        break;

        Status = AE_BAD_PARAMETER;

        break;

    }

}

 *

 * FUNCTION:    AcpiExSystemIoSpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the System IO address space (Op Region)

 *

 ******************************************************************************/

AcpiExSystemIoSpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

    UINT32                  Value32;

        "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",

        BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));

    {

    case ACPI_READ:

                    &Value32, BitWidth);

        *Value = Value32;

        break;

                    (UINT32) *Value, BitWidth);

        break;

        Status = AE_BAD_PARAMETER;

        break;

    }

}

 *

 * FUNCTION:    AcpiExPciConfigSpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the PCI Config address space (Op Region)

 *

 ******************************************************************************/

AcpiExPciConfigSpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

    ACPI_PCI_ID             *PciId;

    UINT16                  PciRegister;

     *  The arguments to AcpiOs(Read|Write)PciConfiguration are:

     *

     *  PciSegment  is the PCI bus segment range 0-31

     *  PciBus      is the PCI bus number range 0-255

     *  PciDevice   is the PCI device number range 0-31

     *  PciFunction is the PCI device function number

     *  PciRegister is the Config space register range 0-255 bytes

     *

     *  Value - input value for write, output address for read

     *

     */

    PciId       = (ACPI_PCI_ID *) RegionContext;

    PciRegister = (UINT16) (UINT32) Address;

        "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",

        Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,

        PciId->Function, PciRegister));

    {

    case ACPI_READ:

        Status = AcpiOsReadPciConfiguration (PciId, PciRegister,

                    Value, BitWidth);

        break;

                    *Value, BitWidth);

        break;

        break;

    }

}

 *

 * FUNCTION:    AcpiExCmosSpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the CMOS address space (Op Region)

 *

 ******************************************************************************/

AcpiExCmosSpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

}

 *

 * FUNCTION:    AcpiExPciBarSpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)

 *

 ******************************************************************************/

AcpiExPciBarSpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

}

 *

 * FUNCTION:    AcpiExDataTableSpaceHandler

 *

 * PARAMETERS:  Function            - Read or Write operation

 *              Address             - Where in the space to read or write

 *              BitWidth            - Field width in bits (8, 16, or 32)

 *              Value               - Pointer to in or out value

 *              HandlerContext      - Pointer to Handler's context

 *              RegionContext       - Pointer to context specific to the

 *                                    accessed region

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Handler for the Data Table address space (Op Region)

 *

 ******************************************************************************/

AcpiExDataTableSpaceHandler (

    UINT32                  Function,

    ACPI_PHYSICAL_ADDRESS   Address,

    UINT32                  BitWidth,

    UINT64                  *Value,

    void                    *HandlerContext,

    void                    *RegionContext)

{

    ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);

     * Perform the memory read or write. The BitWidth was already

     * validated.

     */

    switch (Function)

    {

    case ACPI_READ:

            ACPI_DIV_8 (BitWidth));

        break;

            ACPI_DIV_8 (BitWidth));

        break;

    }

}