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 *

 * Module Name: asllength - Tree walk to determine package and opcode lengths

 *

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

 *

 * 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 "aslcompiler.y.h"

#include "amlcode.h"

        ACPI_MODULE_NAME    ("asllength")

CgGetPackageLenByteCount (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  PackageLength);

CgGenerateAmlOpcodeLength (

    ACPI_PARSE_OBJECT       *Op);

void

LnAdjustLengthToRoot (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  LengthDelta);

#endif

 *

 * FUNCTION:    LnInitLengthsWalk

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Walk callback to initialize (and re-initialize) the node

 *              subtree length(s) to zero.  The Subtree lengths are bubbled

 *              up to the root node in order to get a total AML length.

 *

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

LnInitLengthsWalk (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    return (AE_OK);

}

 *

 * FUNCTION:    LnPackageLengthWalk

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Walk callback to calculate the total AML length.

 *              1) Calculate the AML lengths (opcode, package length, etc.) for

 *                 THIS node.

 *              2) Bubbble up all of these lengths to the parent node by summing

 *                 them all into the parent subtree length.

 *

 * Note:  The SubtreeLength represents the total AML length of all child nodes

 *        in all subtrees under a given node.  Therefore, once this walk is

 *        complete, the Root Node subtree length is the AML length of the entire

 *        tree (and thus, the entire ACPI table)

 *

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

LnPackageLengthWalk (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

        (Op->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))

    {

        Op->Asl.Parent->Asl.AmlSubtreeLength += (Op->Asl.AmlLength +

                                           Op->Asl.AmlOpcodeLength +

                                           Op->Asl.AmlPkgLenBytes +

                                           Op->Asl.AmlSubtreeLength);

    }

    return (AE_OK);

}

 *

 * FUNCTION:    CgGetPackageLenByteCount

 *

 * PARAMETERS:  Op              - Parse node

 *              PackageLength   - Length to be encoded

 *

 * RETURN:      Required length of the package length encoding

 *

 * DESCRIPTION: Calculate the number of bytes required to encode the given

 *              package length.

 *

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

CgGetPackageLenByteCount (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  PackageLength)

{

     * Determine the number of bytes required to encode the package length

     * Note: the package length includes the number of bytes used to encode

     * the package length, so we must account for this also.

     */

    if (PackageLength <= (0x0000003F - 1))

    {

        return (1);

    }

    else if (PackageLength <= (0x00000FFF - 2))

    {

        return (2);

    }

    else if (PackageLength <= (0x000FFFFF - 3))

    {

        return (3);

    }

    else if (PackageLength <= (0x0FFFFFFF - 4))

    {

        return (4);

    }

    else

    {

        /* Fatal error - the package length is too large to encode */

    }

}

 *

 * FUNCTION:    CgGenerateAmlOpcodeLength

 *

 * PARAMETERS:  Op          - Parse node whose AML opcode lengths will be

 *                            calculated

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Calculate the AmlOpcodeLength, AmlPkgLenBytes, and AmlLength

 *              fields for this node.

 *

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

CgGenerateAmlOpcodeLength (

    ACPI_PARSE_OBJECT       *Op)

{

    {

        Op->Asl.AmlOpcodeLength = 2;

    }

    else

    {

        Op->Asl.AmlOpcodeLength = 1;

    }

    if (Op->Asl.CompileFlags & NODE_AML_PACKAGE)

    {

        Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (

                                    Op, Op->Asl.AmlSubtreeLength);

    }

    {

    case AML_BYTE_OP:

        break;

        break;

        break;

        break;

        /* All data opcodes must be above */

        break;

    }

}

 *

 * FUNCTION:    CgGenerateAmlLengths

 *

 * PARAMETERS:  Op        - Parse node

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Generate internal length fields based on the AML opcode or

 *              parse opcode.

 *

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

CgGenerateAmlLengths (

    ACPI_PARSE_OBJECT       *Op)

{

    char                    *Buffer;

    ACPI_STATUS             Status;

    {

    case AML_RAW_DATA_BYTE:

        Op->Asl.AmlLength = 1;

        return;

        Op->Asl.AmlLength = 2;

        return;

        Op->Asl.AmlLength = 4;

        return;

        Op->Asl.AmlLength = 8;

        return;

        return;

        return;

        break;

    }

    {

    case PARSEOP_DEFINITIONBLOCK:

                            Op->Asl.AmlSubtreeLength;

        break;

        Op->Asl.AmlLength = 4;

        Op->Asl.ExternalName = Op->Asl.Value.String;

        break;

    case PARSEOP_METHODCALL:

        {

            break;

        }

        Status = UtInternalizeName (Op->Asl.Value.String, &Buffer);

        if (ACPI_FAILURE (Status))

        {

            DbgPrint (ASL_DEBUG_OUTPUT,

                "Failure from internalize name %X\n", Status);

            break;

        }

        Op->Asl.Value.String = Buffer;

        Op->Asl.CompileFlags |= NODE_NAME_INTERNALIZED;

         * Check for single backslash reference to root,

         * make it a null terminated string in the AML

         */

        if (Op->Asl.AmlLength == 1)

        {

            Op->Asl.AmlLength = 2;

        }

        break;

        break;

        Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op,

                                    (UINT32) Op->Asl.Value.Integer);

        break;

        break;

    case PARSEOP_EXTERNAL:

    case PARSEOP_INCLUDE:

    case PARSEOP_INCLUDE_END:

        break;

    }

}

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

 *

 * FUNCTION:    LnAdjustLengthToRoot

 *

 * PARAMETERS:  Op      - Node whose Length was changed

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Change the Subtree length of the given node, and bubble the

 *              change all the way up to the root node.  This allows for

 *              last second changes to a package length (for example, if the

 *              package length encoding gets shorter or longer.)

 *

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

LnAdjustLengthToRoot (

    ACPI_PARSE_OBJECT       *SubtreeOp,

    UINT32                  LengthDelta)

{

    ACPI_PARSE_OBJECT       *Op;

    while (Op)

    {

        Op->Asl.AmlSubtreeLength -= LengthDelta;

        Op = Op->Asl.Parent;

    }

}

#endif