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

 *

 * Module Name: dmwalk - AML disassembly tree walk

 *

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

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

 *

 * 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 "acpi.h"

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdisasm.h"

#include "acdebug.h"

#ifdef ACPI_DISASSEMBLER

#define _COMPONENT          ACPI_CA_DEBUGGER

        ACPI_MODULE_NAME    ("dmwalk")

#define DB_FULL_OP_INFO     "[%4.4s] @%5.5X #%4.4X:  "

/* Stub for non-compiler code */

#ifndef ACPI_ASL_COMPILER

void

AcpiDmEmitExternals (

    void)

{

    return;

}

#endif

/* Local prototypes */

static ACPI_STATUS

AcpiDmDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static ACPI_STATUS

AcpiDmAscendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static UINT32

AcpiDmBlockType (

    ACPI_PARSE_OBJECT       *Op);

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

 *

 * FUNCTION:    AcpiDmDisassemble

 *

 * PARAMETERS:  WalkState       - Current state

 *              Origin          - Starting object

 *              NumOpcodes      - Max number of opcodes to be displayed

 *

 * RETURN:      None

 *

 * DESCRIPTION: Disassemble parser object and its children.  This is the

 *              main entry point of the disassembler.

 *

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

void

AcpiDmDisassemble (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Origin,

    UINT32                  NumOpcodes)

{

    ACPI_PARSE_OBJECT       *Op = Origin;

    ACPI_OP_WALK_INFO       Info;

    if (!Op)

    {

        return;

    }

    Info.Flags = 0;

    Info.Level = 0;

    Info.Count = 0;

    Info.WalkState = WalkState;

    AcpiDmWalkParseTree (Op, AcpiDmDescendingOp, AcpiDmAscendingOp, &Info);

    return;

}

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

 *

 * FUNCTION:    AcpiDmWalkParseTree

 *

 * PARAMETERS:  Op                      - Root Op object

 *              DescendingCallback      - Called during tree descent

 *              AscendingCallback       - Called during tree ascent

 *              Context                 - To be passed to the callbacks

 *

 * RETURN:      Status from callback(s)

 *

 * DESCRIPTION: Walk the entire parse tree.

 *

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

void

AcpiDmWalkParseTree (

    ACPI_PARSE_OBJECT       *Op,

    ASL_WALK_CALLBACK       DescendingCallback,

    ASL_WALK_CALLBACK       AscendingCallback,

    void                    *Context)

{

    BOOLEAN                 NodePreviouslyVisited;

    ACPI_PARSE_OBJECT       *StartOp = Op;

    ACPI_STATUS             Status;

    ACPI_PARSE_OBJECT       *Next;

    ACPI_OP_WALK_INFO       *Info = Context;

    Info->Level = 0;

    NodePreviouslyVisited = FALSE;

    while (Op)

    {

        if (NodePreviouslyVisited)

        {

            if (AscendingCallback)

            {

                Status = AscendingCallback (Op, Info->Level, Context);

                if (ACPI_FAILURE (Status))

                {

                    return;

                }

            }

        }

        else

        {

            /* Let the callback process the node */

            Status = DescendingCallback (Op, Info->Level, Context);

            if (ACPI_SUCCESS (Status))

            {

                /* Visit children first, once */

                Next = AcpiPsGetArg (Op, 0);

                if (Next)

                {

                    Info->Level++;

                    Op = Next;

                    continue;

                }

            }

            else if (Status != AE_CTRL_DEPTH)

            {

                /* Exit immediately on any error */

                return;

            }

        }

        /* Terminate walk at start op */

        if (Op == StartOp)

        {

            break;

        }

        /* No more children, re-visit this node */

        if (!NodePreviouslyVisited)

        {

            NodePreviouslyVisited = TRUE;

            continue;

        }

        /* No more children, visit peers */

        if (Op->Common.Next)

        {

            Op = Op->Common.Next;

            NodePreviouslyVisited = FALSE;

        }

        else

        {

            /* No peers, re-visit parent */

            if (Info->Level != 0 )

            {

                Info->Level--;

            }

            Op = Op->Common.Parent;

            NodePreviouslyVisited = TRUE;

        }

    }

    /* If we get here, the walk completed with no errors */

    return;

}

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

 *

 * FUNCTION:    AcpiDmBlockType

 *

 * PARAMETERS:  Op              - Object to be examined

 *

 * RETURN:      BlockType - not a block, parens, braces, or even both.

 *

 * DESCRIPTION: Type of block for this op (parens or braces)

 *

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

static UINT32

AcpiDmBlockType (

    ACPI_PARSE_OBJECT       *Op)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    if (!Op)

    {

        return (BLOCK_NONE);

    }

    switch (Op->Common.AmlOpcode)

    {

    case AML_ELSE_OP:

        return (BLOCK_BRACE);

    case AML_METHOD_OP:

    case AML_DEVICE_OP:

    case AML_SCOPE_OP:

    case AML_PROCESSOR_OP:

    case AML_POWER_RES_OP:

    case AML_THERMAL_ZONE_OP:

    case AML_IF_OP:

    case AML_WHILE_OP:

    case AML_FIELD_OP:

    case AML_INDEX_FIELD_OP:

    case AML_BANK_FIELD_OP:

        return (BLOCK_PAREN | BLOCK_BRACE);

    case AML_BUFFER_OP:

        if (Op->Common.DisasmOpcode == ACPI_DASM_UNICODE)

        {

            return (BLOCK_NONE);

        }

        /*lint -fallthrough */

    case AML_PACKAGE_OP:

    case AML_VAR_PACKAGE_OP:

        return (BLOCK_PAREN | BLOCK_BRACE);

    case AML_EVENT_OP:

        return (BLOCK_PAREN);

    default:

        OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

        if (OpInfo->Flags & AML_HAS_ARGS)

        {

            return (BLOCK_PAREN);

        }

        return (BLOCK_NONE);

    }

}

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

 *

 * FUNCTION:    AcpiDmListType

 *

 * PARAMETERS:  Op              - Object to be examined

 *

 * RETURN:      ListType - has commas or not.

 *

 * DESCRIPTION: Type of block for this op (parens or braces)

 *

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

UINT32

AcpiDmListType (

    ACPI_PARSE_OBJECT       *Op)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    if (!Op)

    {

        return (BLOCK_NONE);

    }

    switch (Op->Common.AmlOpcode)

    {

    case AML_ELSE_OP:

    case AML_METHOD_OP:

    case AML_DEVICE_OP:

    case AML_SCOPE_OP:

    case AML_POWER_RES_OP:

    case AML_PROCESSOR_OP:

    case AML_THERMAL_ZONE_OP:

    case AML_IF_OP:

    case AML_WHILE_OP:

    case AML_FIELD_OP:

    case AML_INDEX_FIELD_OP:

    case AML_BANK_FIELD_OP:

        return (BLOCK_NONE);

    case AML_BUFFER_OP:

    case AML_PACKAGE_OP:

    case AML_VAR_PACKAGE_OP:

        return (BLOCK_COMMA_LIST);

    default:

        OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

        if (OpInfo->Flags & AML_HAS_ARGS)

        {

            return (BLOCK_COMMA_LIST);

        }

        return (BLOCK_NONE);

    }

}

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

 *

 * FUNCTION:    AcpiDmDescendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: First visitation of a parse object during tree descent.

 *              Decode opcode name and begin parameter list(s), if any.

 *

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

static ACPI_STATUS

AcpiDmDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    const ACPI_OPCODE_INFO  *OpInfo;

    UINT32                  Name;

    ACPI_PARSE_OBJECT       *NextOp;

    if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)

    {

        /* Ignore this op -- it was handled elsewhere */

        return (AE_CTRL_DEPTH);

    }

    /* Level 0 is at the Definition Block level */

    if (Level == 0)

    {

        /* In verbose mode, print the AML offset, opcode and depth count */

        if (Info->WalkState)

        {

            VERBOSE_PRINT ((DB_FULL_OP_INFO,

                (Info->WalkState->MethodNode ?

                    Info->WalkState->MethodNode->Name.Ascii : "   "),

                Op->Common.AmlOffset, (UINT32) Op->Common.AmlOpcode));

        }

        if (Op->Common.AmlOpcode == AML_SCOPE_OP)

        {

            /* This is the beginning of the Definition Block */

            AcpiOsPrintf ("{\n");

            /* Emit all External() declarations here */

            AcpiDmEmitExternals ();

            return (AE_OK);

        }

    }

    else if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&

             (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&

             (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))

    {

            /*

             * This is a first-level element of a term list,

             * indent a new line

             */

            AcpiDmIndent (Level);

            Info->LastLevel = Level;

            Info->Count = 0;

    }

    /*

     * This is an inexpensive mechanism to try and keep lines from getting

     * too long. When the limit is hit, start a new line at the previous

     * indent plus one. A better but more expensive mechanism would be to

     * keep track of the current column.

     */

    Info->Count++;

    if (Info->Count /*+Info->LastLevel*/ > 10)

    {

        Info->Count = 0;

        AcpiOsPrintf ("\n");

        AcpiDmIndent (Info->LastLevel + 1);

    }

    /* Print the opcode name */

    AcpiDmDisassembleOneOp (NULL, Info, Op);

    if (Op->Common.DisasmOpcode == ACPI_DASM_LNOT_PREFIX)

    {

        return (AE_OK);

    }

    if ((Op->Common.AmlOpcode == AML_NAME_OP) ||

        (Op->Common.AmlOpcode == AML_RETURN_OP))

    {

        Info->Level--;

    }

    /* Start the opcode argument list if necessary */

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    if ((OpInfo->Flags & AML_HAS_ARGS) ||

        (Op->Common.AmlOpcode == AML_EVENT_OP))

    {

        /* This opcode has an argument list */

        if (AcpiDmBlockType (Op) & BLOCK_PAREN)

        {

            AcpiOsPrintf (" (");

        }

        /* If this is a named opcode, print the associated name value */

        if (OpInfo->Flags & AML_NAMED)

        {

            switch (Op->Common.AmlOpcode)

            {

            case AML_ALIAS_OP:

                NextOp = AcpiPsGetDepthNext (NULL, Op);

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

                AcpiDmNamestring (NextOp->Common.Value.Name);

                AcpiOsPrintf (", ");

                /*lint -fallthrough */

            default:

                Name = AcpiPsGetName (Op);

                if (Op->Named.Path)

                {

                    AcpiDmNamestring ((char *) Op->Named.Path);

                }

                else

                {

                    AcpiDmDumpName (Name);

                }

                if (Op->Common.AmlOpcode != AML_INT_NAMEDFIELD_OP)

                {

                    if (AcpiGbl_DbOpt_verbose)

                    {

                        (void) AcpiPsDisplayObjectPathname (NULL, Op);

                    }

                }

                break;

            }

            switch (Op->Common.AmlOpcode)

            {

            case AML_METHOD_OP:

                AcpiDmMethodFlags (Op);

                AcpiOsPrintf (")");

                break;

            case AML_NAME_OP:

                /* Check for _HID and related EISAID() */

                AcpiDmIsEisaId (Op);

                AcpiOsPrintf (", ");

                break;

            case AML_REGION_OP:

                AcpiDmRegionFlags (Op);

                break;

            case AML_POWER_RES_OP:

                /* Mark the next two Ops as part of the parameter list */

                AcpiOsPrintf (", ");

                NextOp = AcpiPsGetDepthNext (NULL, Op);

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

                NextOp = NextOp->Common.Next;

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

                return (AE_OK);

            case AML_PROCESSOR_OP:

                /* Mark the next three Ops as part of the parameter list */

                AcpiOsPrintf (", ");

                NextOp = AcpiPsGetDepthNext (NULL, Op);

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

                NextOp = NextOp->Common.Next;

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

                NextOp = NextOp->Common.Next;

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

                return (AE_OK);

            case AML_MUTEX_OP:

            case AML_DATA_REGION_OP:

                AcpiOsPrintf (", ");

                return (AE_OK);

            case AML_EVENT_OP:

            case AML_ALIAS_OP:

                return (AE_OK);

            case AML_SCOPE_OP:

            case AML_DEVICE_OP:

            case AML_THERMAL_ZONE_OP:

                AcpiOsPrintf (")");

                break;

            default:

                AcpiOsPrintf ("*** Unhandled named opcode %X\n", Op->Common.AmlOpcode);

                break;

            }

        }

        else switch (Op->Common.AmlOpcode)

        {

        case AML_FIELD_OP:

        case AML_BANK_FIELD_OP:

        case AML_INDEX_FIELD_OP:

            Info->BitOffset = 0;

            /* Name of the parent OperationRegion */

            NextOp = AcpiPsGetDepthNext (NULL, Op);

            AcpiDmNamestring (NextOp->Common.Value.Name);

            AcpiOsPrintf (", ");

            NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

            switch (Op->Common.AmlOpcode)

            {

            case AML_BANK_FIELD_OP:

                /* Namestring - Bank Name */

                NextOp = AcpiPsGetDepthNext (NULL, NextOp);

                AcpiDmNamestring (NextOp->Common.Value.Name);

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

                AcpiOsPrintf (", ");

                /*

                 * Bank Value. This is a TermArg in the middle of the parameter

                 * list, must handle it here.

                 *

                 * Disassemble the TermArg parse tree. ACPI_PARSEOP_PARAMLIST

                 * eliminates newline in the output.

                 */

                NextOp = NextOp->Common.Next;

                Info->Flags = ACPI_PARSEOP_PARAMLIST;

                AcpiDmWalkParseTree (NextOp, AcpiDmDescendingOp, AcpiDmAscendingOp, Info);

                Info->Flags = 0;

                Info->Level = Level;

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

                AcpiOsPrintf (", ");

                break;

            case AML_INDEX_FIELD_OP:

                /* Namestring - Data Name */

                NextOp = AcpiPsGetDepthNext (NULL, NextOp);

                AcpiDmNamestring (NextOp->Common.Value.Name);

                AcpiOsPrintf (", ");

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

                break;

            default:

                break;

            }

            AcpiDmFieldFlags (NextOp);

            break;

        case AML_BUFFER_OP:

            /* The next op is the size parameter */

            NextOp = AcpiPsGetDepthNext (NULL, Op);

            if (!NextOp)

            {

                /* Single-step support */

                return (AE_OK);

            }

            if (Op->Common.DisasmOpcode == ACPI_DASM_RESOURCE)

            {

                /*

                 * We have a resource list.  Don't need to output

                 * the buffer size Op.  Open up a new block

                 */

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;

                NextOp = NextOp->Common.Next;

                AcpiOsPrintf (")\n");

                AcpiDmIndent (Info->Level);

                AcpiOsPrintf ("{\n");

                return (AE_OK);

            }

            /* Normal Buffer, mark size as in the parameter list */

            NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

            return (AE_OK);

        case AML_VAR_PACKAGE_OP:

        case AML_IF_OP:

        case AML_WHILE_OP:

            /* The next op is the size or predicate parameter */

            NextOp = AcpiPsGetDepthNext (NULL, Op);

            if (NextOp)

            {

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

            }

            return (AE_OK);

        case AML_PACKAGE_OP:

            /* The next op is the size or predicate parameter */

            NextOp = AcpiPsGetDepthNext (NULL, Op);

            if (NextOp)

            {

                NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;

            }

            return (AE_OK);

        case AML_MATCH_OP:

            AcpiDmMatchOp (Op);

            break;

        default:

            break;

        }

        if (AcpiDmBlockType (Op) & BLOCK_BRACE)

        {

            AcpiOsPrintf ("\n");

            AcpiDmIndent (Level);

            AcpiOsPrintf ("{\n");

        }

    }

    return (AE_OK);

}

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

 *

 * FUNCTION:    AcpiDmAscendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Second visitation of a parse object, during ascent of parse

 *              tree.  Close out any parameter lists and complete the opcode.

 *

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

static ACPI_STATUS

AcpiDmAscendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)

    {

        /* Ignore this op -- it was handled elsewhere */

        return (AE_OK);

    }

    if ((Level == 0) && (Op->Common.AmlOpcode == AML_SCOPE_OP))

    {

        /* Indicates the end of the current descriptor block (table) */

        AcpiOsPrintf ("}\n\n");

        return (AE_OK);

    }

    switch (AcpiDmBlockType (Op))

    {

    case BLOCK_PAREN:

        /* Completed an op that has arguments, add closing paren */

        AcpiOsPrintf (")");

        /* Could be a nested operator, check if comma required */

        if (!AcpiDmCommaIfListMember (Op))

        {

            if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&

                     (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&

                     (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))

            {

                /*

                 * This is a first-level element of a term list

                 * start a new line

                 */

                if (!(Info->Flags & ACPI_PARSEOP_PARAMLIST))

                {

                    AcpiOsPrintf ("\n");

                }

            }

        }

        break;

    case BLOCK_BRACE:

    case (BLOCK_BRACE | BLOCK_PAREN):

        /* Completed an op that has a term list, add closing brace */

        if (Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST)

        {

            AcpiOsPrintf ("}");

        }

        else

        {

            AcpiDmIndent (Level);

            AcpiOsPrintf ("}");

        }

        AcpiDmCommaIfListMember (Op);

        if (AcpiDmBlockType (Op->Common.Parent) != BLOCK_PAREN)

        {

            AcpiOsPrintf ("\n");

            if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST))

            {

                if ((Op->Common.AmlOpcode == AML_IF_OP)  &&

                    (Op->Common.Next) &&

                    (Op->Common.Next->Common.AmlOpcode == AML_ELSE_OP))

                {

                    break;

                }

                if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&

                    (!Op->Common.Next))

                {

                    break;

                }

                AcpiOsPrintf ("\n");

            }

        }

        break;

    case BLOCK_NONE:

    default:

        /* Could be a nested operator, check if comma required */

        if (!AcpiDmCommaIfListMember (Op))

        {

            if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&

                     (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&

                     (Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))

            {

                /*

                 * This is a first-level element of a term list

                 * start a new line

                 */

                AcpiOsPrintf ("\n");

            }

        }

        else if (Op->Common.Parent)

        {

            switch (Op->Common.Parent->Common.AmlOpcode)

            {

            case AML_PACKAGE_OP:

            case AML_VAR_PACKAGE_OP:

                if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))

                {

                    AcpiOsPrintf ("\n");

                }

                break;

            default:

                break;

            }

        }

        break;

    }

    if (Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)

    {

        if ((Op->Common.Next) &&

            (Op->Common.Next->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))

        {

            return (AE_OK);

        }

        /*

         * Just completed a parameter node for something like "Buffer (param)".

         * Close the paren and open up the term list block with a brace

         */

        if (Op->Common.Next)

        {

            AcpiOsPrintf (")\n");

            AcpiDmIndent (Level - 1);

            AcpiOsPrintf ("{\n");

        }

        else

        {

            Op->Common.Parent->Common.DisasmFlags |=

                                    ACPI_PARSEOP_EMPTY_TERMLIST;

            AcpiOsPrintf (") {");

        }

    }

    if ((Op->Common.AmlOpcode == AML_NAME_OP) ||

        (Op->Common.AmlOpcode == AML_RETURN_OP))

    {

        Info->Level++;

    }

    return (AE_OK);

}

#endif  /* ACPI_DISASSEMBLER */