dmdeferred.c

/******************************************************************************
 *
 * Module Name: dmdeferred - Disassembly of deferred AML opcodes
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2025, 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.
 *
 *****************************************************************************
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 *****************************************************************************/

#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acdispat.h>
#include <contrib/dev/acpica/include/amlcode.h>
#include <contrib/dev/acpica/include/acdisasm.h>
#include <contrib/dev/acpica/include/acparser.h>

#define _COMPONENT          ACPI_CA_DISASSEMBLER
        ACPI_MODULE_NAME    ("dmdeferred")


/* Local prototypes */

static ACPI_STATUS
AcpiDmDeferredParse (
    ACPI_PARSE_OBJECT       *Op,
    UINT8                   *Aml,
    UINT32                  AmlLength);


/******************************************************************************
 *
 * FUNCTION:    AcpiDmParseDeferredOps
 *
 * PARAMETERS:  Root                - Root of the parse tree
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Parse the deferred opcodes (Methods, regions, etc.)
 *
 *****************************************************************************/

ACPI_STATUS
AcpiDmParseDeferredOps (
    ACPI_PARSE_OBJECT       *Root)
{
    const ACPI_OPCODE_INFO  *OpInfo;
    ACPI_PARSE_OBJECT       *Op = Root;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (DmParseDeferredOps);


    /* Traverse the entire parse tree */

    while (Op)
    {
        OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
        if (!(OpInfo->Flags & AML_DEFER))
        {
            Op = AcpiPsGetDepthNext (Root, Op);
            continue;
        }

        /* Now we know we have a deferred opcode */

        switch (Op->Common.AmlOpcode)
        {
        case AML_METHOD_OP:
        case AML_BUFFER_OP:
        case AML_PACKAGE_OP:
        case AML_VARIABLE_PACKAGE_OP:

            Status = AcpiDmDeferredParse (
                Op, Op->Named.Data, Op->Named.Length);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
            break;

        /* We don't need to do anything for these deferred opcodes */

        case AML_REGION_OP:
        case AML_DATA_REGION_OP:
        case AML_CREATE_QWORD_FIELD_OP:
        case AML_CREATE_DWORD_FIELD_OP:
        case AML_CREATE_WORD_FIELD_OP:
        case AML_CREATE_BYTE_FIELD_OP:
        case AML_CREATE_BIT_FIELD_OP:
        case AML_CREATE_FIELD_OP:
        case AML_BANK_FIELD_OP:

            break;

        default:

            ACPI_ERROR ((AE_INFO, "Unhandled deferred AML opcode [0x%.4X]",
                 Op->Common.AmlOpcode));
            break;
        }

        Op = AcpiPsGetDepthNext (Root, Op);
    }

    return_ACPI_STATUS (AE_OK);
}


/******************************************************************************
 *
 * FUNCTION:    AcpiDmDeferredParse
 *
 * PARAMETERS:  Op                  - Root Op of the deferred opcode
 *              Aml                 - Pointer to the raw AML
 *              AmlLength           - Length of the AML
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Parse one deferred opcode
 *              (Methods, operation regions, etc.)
 *
 *****************************************************************************/

static ACPI_STATUS
AcpiDmDeferredParse (
    ACPI_PARSE_OBJECT       *Op,
    UINT8                   *Aml,
    UINT32                  AmlLength)
{
    ACPI_WALK_STATE         *WalkState;
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *SearchOp;
    ACPI_PARSE_OBJECT       *StartOp;
    ACPI_PARSE_OBJECT       *NewRootOp;
    ACPI_PARSE_OBJECT       *ExtraOp;


    ACPI_FUNCTION_TRACE (DmDeferredParse);


    if (!Aml || !AmlLength)
    {
        return_ACPI_STATUS (AE_OK);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Parsing deferred opcode %s [%4.4s]\n",
        Op->Common.AmlOpName, (char *) &Op->Named.Name));

    /* Need a new walk state to parse the AML */

    WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, Aml,
        AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Parse the AML for this deferred opcode */

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
    Status = AcpiPsParseAml (WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS(Status);
    }

    StartOp = (Op->Common.Value.Arg)->Common.Next;
    SearchOp = StartOp;
    while (SearchOp)
    {
        SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
    }

    /*
     * For Buffer and Package opcodes, link the newly parsed subtree
     * into the main parse tree
     */
    switch (Op->Common.AmlOpcode)
    {
    case AML_BUFFER_OP:
    case AML_PACKAGE_OP:
    case AML_VARIABLE_PACKAGE_OP:

        switch (Op->Common.AmlOpcode)
        {
        case AML_PACKAGE_OP:

            ExtraOp = Op->Common.Value.Arg;
            NewRootOp = ExtraOp->Common.Next;
            ACPI_FREE (ExtraOp);
            break;

        case AML_VARIABLE_PACKAGE_OP:
        case AML_BUFFER_OP:
        default:

            NewRootOp = Op->Common.Value.Arg;
            break;
        }

        Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;

        /* Must point all parents to the main tree */

        StartOp = Op;
        SearchOp = StartOp;
        while (SearchOp)
        {
            if (SearchOp->Common.Parent == NewRootOp)
            {
                SearchOp->Common.Parent = Op;
            }

            SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
        }

        ACPI_FREE (NewRootOp);
        break;

    default:

        break;
    }

    return_ACPI_STATUS (AE_OK);
}