acpica/parser/psargs.c

db2bae30SDana Myers/******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * Module Name: psargs - Parse AML opcode arguments
db2bae30SDana Myers *
db2bae30SDana Myers *****************************************************************************/
db2bae30SDana Myers
26f3cdf0SGordon Ross/*
*385cc6b4SJerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
db2bae30SDana Myers * All rights reserved.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Redistribution and use in source and binary forms, with or without
26f3cdf0SGordon Ross * modification, are permitted provided that the following conditions
26f3cdf0SGordon Ross * are met:
26f3cdf0SGordon Ross * 1. Redistributions of source code must retain the above copyright
26f3cdf0SGordon Ross *    notice, this list of conditions, and the following disclaimer,
26f3cdf0SGordon Ross *    without modification.
26f3cdf0SGordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
26f3cdf0SGordon Ross *    substantially similar to the "NO WARRANTY" disclaimer below
26f3cdf0SGordon Ross *    ("Disclaimer") and any redistribution must be conditioned upon
26f3cdf0SGordon Ross *    including a substantially similar Disclaimer requirement for further
26f3cdf0SGordon Ross *    binary redistribution.
26f3cdf0SGordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
26f3cdf0SGordon Ross *    of any contributors may be used to endorse or promote products derived
26f3cdf0SGordon Ross *    from this software without specific prior written permission.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Alternatively, this software may be distributed under the terms of the
26f3cdf0SGordon Ross * GNU General Public License ("GPL") version 2 as published by the Free
26f3cdf0SGordon Ross * Software Foundation.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * NO WARRANTY
26f3cdf0SGordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26f3cdf0SGordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26f3cdf0SGordon Ross * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26f3cdf0SGordon Ross * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26f3cdf0SGordon Ross * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26f3cdf0SGordon Ross * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26f3cdf0SGordon Ross * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26f3cdf0SGordon Ross * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26f3cdf0SGordon Ross * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26f3cdf0SGordon Ross * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26f3cdf0SGordon Ross * POSSIBILITY OF SUCH DAMAGES.
26f3cdf0SGordon Ross */
db2bae30SDana Myers
db2bae30SDana Myers#include "acpi.h"
aa2aa9a6SDana Myers#include "accommon.h"
db2bae30SDana Myers#include "acparser.h"
db2bae30SDana Myers#include "amlcode.h"
db2bae30SDana Myers#include "acnamesp.h"
db2bae30SDana Myers#include "acdispat.h"
db2bae30SDana Myers
db2bae30SDana Myers#define _COMPONENT          ACPI_PARSER
db2bae30SDana Myers        ACPI_MODULE_NAME    ("psargs")
db2bae30SDana Myers
db2bae30SDana Myers/* Local prototypes */
db2bae30SDana Myers
db2bae30SDana Myersstatic UINT32
db2bae30SDana MyersAcpiPsGetNextPackageLength (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState);
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_PARSE_OBJECT *
db2bae30SDana MyersAcpiPsGetNextField (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextPackageLength
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Decoded package length. On completion, the AML pointer points
db2bae30SDana Myers *              past the length byte or bytes.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Decode and return a package length field.
db2bae30SDana Myers *              Note: Largest package length is 28 bits, from ACPI specification
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic UINT32
db2bae30SDana MyersAcpiPsGetNextPackageLength (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT8                   *Aml = ParserState->Aml;
db2bae30SDana Myers    UINT32                  PackageLength = 0;
db2bae30SDana Myers    UINT32                  ByteCount;
db2bae30SDana Myers    UINT8                   ByteZeroMask = 0x3F; /* Default [0:5] */
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (PsGetNextPackageLength);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Byte 0 bits [6:7] contain the number of additional bytes
db2bae30SDana Myers     * used to encode the package length, either 0,1,2, or 3
db2bae30SDana Myers     */
db2bae30SDana Myers    ByteCount = (Aml[0] >> 6);
db2bae30SDana Myers    ParserState->Aml += ((ACPI_SIZE) ByteCount + 1);
db2bae30SDana Myers
db2bae30SDana Myers    /* Get bytes 3, 2, 1 as needed */
db2bae30SDana Myers
db2bae30SDana Myers    while (ByteCount)
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
db2bae30SDana Myers         * Final bit positions for the package length bytes:
db2bae30SDana Myers         *      Byte3->[20:27]
db2bae30SDana Myers         *      Byte2->[12:19]
db2bae30SDana Myers         *      Byte1->[04:11]
db2bae30SDana Myers         *      Byte0->[00:03]
db2bae30SDana Myers         */
db2bae30SDana Myers        PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4));
db2bae30SDana Myers
db2bae30SDana Myers        ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */
db2bae30SDana Myers        ByteCount--;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
db2bae30SDana Myers
db2bae30SDana Myers    PackageLength |= (Aml[0] & ByteZeroMask);
db2bae30SDana Myers    return_UINT32 (PackageLength);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextPackageEnd
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Pointer to end-of-package +1
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get next package length and return a pointer past the end of
db2bae30SDana Myers *              the package. Consumes the package length field
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersUINT8 *
db2bae30SDana MyersAcpiPsGetNextPackageEnd (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT8                   *Start = ParserState->Aml;
db2bae30SDana Myers    UINT32                  PackageLength;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (PsGetNextPackageEnd);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Function below updates ParserState->Aml */
db2bae30SDana Myers
db2bae30SDana Myers    PackageLength = AcpiPsGetNextPackageLength (ParserState);
db2bae30SDana Myers
db2bae30SDana Myers    return_PTR (Start + PackageLength); /* end of package */
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextNamestring
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Pointer to the start of the name string (pointer points into
db2bae30SDana Myers *              the AML.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
db2bae30SDana Myers *              prefix characters. Set parser state to point past the string.
db2bae30SDana Myers *              (Name is consumed from the AML.)
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myerschar *
db2bae30SDana MyersAcpiPsGetNextNamestring (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT8                   *Start = ParserState->Aml;
db2bae30SDana Myers    UINT8                   *End = ParserState->Aml;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (PsGetNextNamestring);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Point past any namestring prefix characters (backslash or carat) */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    while (ACPI_IS_ROOT_PREFIX (*End) ||
*385cc6b4SJerry Jelinek           ACPI_IS_PARENT_PREFIX (*End))
db2bae30SDana Myers    {
db2bae30SDana Myers        End++;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Decode the path prefix character */
db2bae30SDana Myers
db2bae30SDana Myers    switch (*End)
db2bae30SDana Myers    {
db2bae30SDana Myers    case 0:
db2bae30SDana Myers
db2bae30SDana Myers        /* NullName */
db2bae30SDana Myers
db2bae30SDana Myers        if (End == Start)
db2bae30SDana Myers        {
db2bae30SDana Myers            Start = NULL;
db2bae30SDana Myers        }
db2bae30SDana Myers        End++;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case AML_DUAL_NAME_PREFIX:
db2bae30SDana Myers
db2bae30SDana Myers        /* Two name segments */
db2bae30SDana Myers
db2bae30SDana Myers        End += 1 + (2 * ACPI_NAME_SIZE);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case AML_MULTI_NAME_PREFIX_OP:
db2bae30SDana Myers
db2bae30SDana Myers        /* Multiple name segments, 4 chars each, count in next byte */
db2bae30SDana Myers
db2bae30SDana Myers        End += 2 + (*(End + 1) * ACPI_NAME_SIZE);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    default:
db2bae30SDana Myers
db2bae30SDana Myers        /* Single name segment */
db2bae30SDana Myers
db2bae30SDana Myers        End += ACPI_NAME_SIZE;
db2bae30SDana Myers        break;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    ParserState->Aml = End;
db2bae30SDana Myers    return_PTR ((char *) Start);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextNamepath
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *              Arg                 - Where the namepath will be stored
db2bae30SDana Myers *              ArgCount            - If the namepath points to a control method
db2bae30SDana Myers *                                    the method's argument is returned here.
db2bae30SDana Myers *              PossibleMethodCall  - Whether the namepath can possibly be the
db2bae30SDana Myers *                                    start of a method call
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get next name (if method call, return # of required args).
db2bae30SDana Myers *              Names are looked up in the internal namespace to determine
db2bae30SDana Myers *              if the name represents a control method. If a method
db2bae30SDana Myers *              is found, the number of arguments to the method is returned.
db2bae30SDana Myers *              This information is critical for parsing to continue correctly.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiPsGetNextNamepath (
db2bae30SDana Myers    ACPI_WALK_STATE         *WalkState,
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState,
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Arg,
db2bae30SDana Myers    BOOLEAN                 PossibleMethodCall)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers    char                    *Path;
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *NameOp;
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *MethodDesc;
db2bae30SDana Myers    ACPI_NAMESPACE_NODE     *Node;
db2bae30SDana Myers    UINT8                   *Start = ParserState->Aml;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (PsGetNextNamepath);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    Path = AcpiPsGetNextNamestring (ParserState);
db2bae30SDana Myers    AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
db2bae30SDana Myers
db2bae30SDana Myers    /* Null path case is allowed, just exit */
db2bae30SDana Myers
db2bae30SDana Myers    if (!Path)
db2bae30SDana Myers    {
db2bae30SDana Myers        Arg->Common.Value.Name = Path;
db2bae30SDana Myers        return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Lookup the name in the internal namespace, starting with the current
db2bae30SDana Myers     * scope. We don't want to add anything new to the namespace here,
db2bae30SDana Myers     * however, so we use MODE_EXECUTE.
db2bae30SDana Myers     * Allow searching of the parent tree, but don't open a new scope -
db2bae30SDana Myers     * we just want to lookup the object (must be mode EXECUTE to perform
db2bae30SDana Myers     * the upsearch)
db2bae30SDana Myers     */
db2bae30SDana Myers    Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
db2bae30SDana Myers        ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
db2bae30SDana Myers        ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * If this name is a control method invocation, we must
db2bae30SDana Myers     * setup the method call
db2bae30SDana Myers     */
db2bae30SDana Myers    if (ACPI_SUCCESS (Status) &&
db2bae30SDana Myers        PossibleMethodCall &&
db2bae30SDana Myers        (Node->Type == ACPI_TYPE_METHOD))
db2bae30SDana Myers    {
db2bae30SDana Myers        if (WalkState->Opcode == AML_UNLOAD_OP)
db2bae30SDana Myers        {
db2bae30SDana Myers            /*
db2bae30SDana Myers             * AcpiPsGetNextNamestring has increased the AML pointer,
db2bae30SDana Myers             * so we need to restore the saved AML pointer for method call.
db2bae30SDana Myers             */
db2bae30SDana Myers            WalkState->ParserState.Aml = Start;
db2bae30SDana Myers            WalkState->ArgCount = 1;
db2bae30SDana Myers            AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
db2bae30SDana Myers            return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* This name is actually a control method invocation */
db2bae30SDana Myers
db2bae30SDana Myers        MethodDesc = AcpiNsGetAttachedObject (Node);
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
db2bae30SDana Myers            "Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path));
db2bae30SDana Myers
*385cc6b4SJerry Jelinek        NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Start);
db2bae30SDana Myers        if (!NameOp)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Change Arg into a METHOD CALL and attach name to it */
db2bae30SDana Myers
db2bae30SDana Myers        AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
db2bae30SDana Myers        NameOp->Common.Value.Name = Path;
db2bae30SDana Myers
db2bae30SDana Myers        /* Point METHODCALL/NAME to the METHOD Node */
db2bae30SDana Myers
db2bae30SDana Myers        NameOp->Common.Node = Node;
db2bae30SDana Myers        AcpiPsAppendArg (Arg, NameOp);
db2bae30SDana Myers
db2bae30SDana Myers        if (!MethodDesc)
db2bae30SDana Myers        {
db2bae30SDana Myers            ACPI_ERROR ((AE_INFO,
db2bae30SDana Myers                "Control Method %p has no attached object",
db2bae30SDana Myers                Node));
db2bae30SDana Myers            return_ACPI_STATUS (AE_AML_INTERNAL);
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
db2bae30SDana Myers            "Control Method - %p Args %X\n",
db2bae30SDana Myers            Node, MethodDesc->Method.ParamCount));
db2bae30SDana Myers
db2bae30SDana Myers        /* Get the number of arguments to expect */
db2bae30SDana Myers
db2bae30SDana Myers        WalkState->ArgCount = MethodDesc->Method.ParamCount;
db2bae30SDana Myers        return_ACPI_STATUS (AE_OK);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Special handling if the name was not found during the lookup -
db2bae30SDana Myers     * some NotFound cases are allowed
db2bae30SDana Myers     */
db2bae30SDana Myers    if (Status == AE_NOT_FOUND)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* 1) NotFound is ok during load pass 1/2 (allow forward references) */
db2bae30SDana Myers
db2bae30SDana Myers        if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) !=
db2bae30SDana Myers            ACPI_PARSE_EXECUTE)
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AE_OK;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* 2) NotFound during a CondRefOf(x) is ok by definition */
db2bae30SDana Myers
db2bae30SDana Myers        else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP)
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AE_OK;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /*
db2bae30SDana Myers         * 3) NotFound while building a Package is ok at this point, we
db2bae30SDana Myers         * may flag as an error later if slack mode is not enabled.
db2bae30SDana Myers         * (Some ASL code depends on allowing this behavior)
db2bae30SDana Myers         */
db2bae30SDana Myers        else if ((Arg->Common.Parent) &&
db2bae30SDana Myers            ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
db2bae30SDana Myers             (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AE_OK;
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Final exception check (may have been changed from code above) */
db2bae30SDana Myers
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_ERROR_NAMESPACE (Path, Status);
db2bae30SDana Myers
db2bae30SDana Myers        if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) ==
db2bae30SDana Myers            ACPI_PARSE_EXECUTE)
db2bae30SDana Myers        {
db2bae30SDana Myers            /* Report a control method execution error */
db2bae30SDana Myers
db2bae30SDana Myers            Status = AcpiDsMethodError (Status, WalkState);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Save the namepath */
db2bae30SDana Myers
db2bae30SDana Myers    Arg->Common.Value.Name = Path;
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextSimpleArg
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *              ArgType             - The argument type (AML_*_ARG)
db2bae30SDana Myers *              Arg                 - Where the argument is returned
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get the next simple argument (constant, string, or namestring)
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiPsGetNextSimpleArg (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState,
db2bae30SDana Myers    UINT32                  ArgType,
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Arg)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT32                  Length;
db2bae30SDana Myers    UINT16                  Opcode;
db2bae30SDana Myers    UINT8                   *Aml = ParserState->Aml;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    switch (ArgType)
db2bae30SDana Myers    {
db2bae30SDana Myers    case ARGP_BYTEDATA:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get 1 byte from the AML stream */
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_BYTE_OP;
26f3cdf0SGordon Ross        Arg->Common.Value.Integer = (UINT64) *Aml;
db2bae30SDana Myers        Length = 1;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_WORDDATA:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get 2 bytes from the AML stream */
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_WORD_OP;
db2bae30SDana Myers        ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml);
db2bae30SDana Myers        Length = 2;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_DWORDDATA:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get 4 bytes from the AML stream */
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_DWORD_OP;
db2bae30SDana Myers        ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml);
db2bae30SDana Myers        Length = 4;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_QWORDDATA:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get 8 bytes from the AML stream */
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_QWORD_OP;
db2bae30SDana Myers        ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml);
db2bae30SDana Myers        Length = 8;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_CHARLIST:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get a pointer to the string, point past the string */
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_STRING_OP;
db2bae30SDana Myers        Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml);
db2bae30SDana Myers
db2bae30SDana Myers        /* Find the null terminator */
db2bae30SDana Myers
db2bae30SDana Myers        Length = 0;
db2bae30SDana Myers        while (Aml[Length])
db2bae30SDana Myers        {
db2bae30SDana Myers            Length++;
db2bae30SDana Myers        }
db2bae30SDana Myers        Length++;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_NAME:
db2bae30SDana Myers    case ARGP_NAMESTRING:
db2bae30SDana Myers
db2bae30SDana Myers        AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
db2bae30SDana Myers        Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
db2bae30SDana Myers        return_VOID;
db2bae30SDana Myers
db2bae30SDana Myers    default:
db2bae30SDana Myers
26f3cdf0SGordon Ross        ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType));
db2bae30SDana Myers        return_VOID;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    AcpiPsInitOp (Arg, Opcode);
db2bae30SDana Myers    ParserState->Aml += Length;
db2bae30SDana Myers    return_VOID;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextField
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ParserState         - Current parser state object
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      A newly allocated FIELD op
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField)
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_PARSE_OBJECT *
db2bae30SDana MyersAcpiPsGetNextField (
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState)
db2bae30SDana Myers{
*385cc6b4SJerry Jelinek    UINT8                   *Aml;
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Field;
*385cc6b4SJerry Jelinek    ACPI_PARSE_OBJECT       *Arg = NULL;
db2bae30SDana Myers    UINT16                  Opcode;
db2bae30SDana Myers    UINT32                  Name;
*385cc6b4SJerry Jelinek    UINT8                   AccessType;
*385cc6b4SJerry Jelinek    UINT8                   AccessAttribute;
*385cc6b4SJerry Jelinek    UINT8                   AccessLength;
*385cc6b4SJerry Jelinek    UINT32                  PkgLength;
*385cc6b4SJerry Jelinek    UINT8                   *PkgEnd;
*385cc6b4SJerry Jelinek    UINT32                  BufferLength;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (PsGetNextField);
db2bae30SDana Myers
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    Aml = ParserState->Aml;
*385cc6b4SJerry Jelinek
db2bae30SDana Myers    /* Determine field type */
db2bae30SDana Myers
db2bae30SDana Myers    switch (ACPI_GET8 (ParserState->Aml))
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek    case AML_FIELD_OFFSET_OP:
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_INT_RESERVEDFIELD_OP;
db2bae30SDana Myers        ParserState->Aml++;
db2bae30SDana Myers        break;
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    case AML_FIELD_ACCESS_OP:
db2bae30SDana Myers
db2bae30SDana Myers        Opcode = AML_INT_ACCESSFIELD_OP;
db2bae30SDana Myers        ParserState->Aml++;
db2bae30SDana Myers        break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    case AML_FIELD_CONNECTION_OP:
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        Opcode = AML_INT_CONNECTION_OP;
*385cc6b4SJerry Jelinek        ParserState->Aml++;
*385cc6b4SJerry Jelinek        break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    case AML_FIELD_EXT_ACCESS_OP:
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        Opcode = AML_INT_EXTACCESSFIELD_OP;
*385cc6b4SJerry Jelinek        ParserState->Aml++;
*385cc6b4SJerry Jelinek        break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    default:
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        Opcode = AML_INT_NAMEDFIELD_OP;
*385cc6b4SJerry Jelinek        break;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Allocate a new field op */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    Field = AcpiPsAllocOp (Opcode, Aml);
db2bae30SDana Myers    if (!Field)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_PTR (NULL);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Decode the field type */
db2bae30SDana Myers
db2bae30SDana Myers    switch (Opcode)
db2bae30SDana Myers    {
db2bae30SDana Myers    case AML_INT_NAMEDFIELD_OP:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get the 4-character name */
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml);
db2bae30SDana Myers        AcpiPsSetName (Field, Name);
db2bae30SDana Myers        ParserState->Aml += ACPI_NAME_SIZE;
db2bae30SDana Myers
db2bae30SDana Myers        /* Get the length which is encoded as a package length */
db2bae30SDana Myers
db2bae30SDana Myers        Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    case AML_INT_RESERVEDFIELD_OP:
db2bae30SDana Myers
db2bae30SDana Myers        /* Get the length which is encoded as a package length */
db2bae30SDana Myers
db2bae30SDana Myers        Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    case AML_INT_ACCESSFIELD_OP:
*385cc6b4SJerry Jelinek    case AML_INT_EXTACCESSFIELD_OP:
db2bae30SDana Myers
db2bae30SDana Myers        /*
db2bae30SDana Myers         * Get AccessType and AccessAttrib and merge into the field Op
*385cc6b4SJerry Jelinek         * AccessType is first operand, AccessAttribute is second. stuff
*385cc6b4SJerry Jelinek         * these bytes into the node integer value for convenience.
db2bae30SDana Myers         */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        /* Get the two bytes (Type/Attribute) */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        AccessType = ACPI_GET8 (ParserState->Aml);
db2bae30SDana Myers        ParserState->Aml++;
*385cc6b4SJerry Jelinek        AccessAttribute = ACPI_GET8 (ParserState->Aml);
db2bae30SDana Myers        ParserState->Aml++;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        Field->Common.Value.Integer = (UINT8) AccessType;
*385cc6b4SJerry Jelinek        Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8);
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        /* This opcode has a third byte, AccessLength */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        if (Opcode == AML_INT_EXTACCESSFIELD_OP)
*385cc6b4SJerry Jelinek        {
*385cc6b4SJerry Jelinek            AccessLength = ACPI_GET8 (ParserState->Aml);
*385cc6b4SJerry Jelinek            ParserState->Aml++;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            Field->Common.Value.Integer |= (UINT32) (AccessLength << 16);
*385cc6b4SJerry Jelinek        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    case AML_INT_CONNECTION_OP:
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        /*
*385cc6b4SJerry Jelinek         * Argument for Connection operator can be either a Buffer
*385cc6b4SJerry Jelinek         * (resource descriptor), or a NameString.
*385cc6b4SJerry Jelinek         */
*385cc6b4SJerry Jelinek        Aml = ParserState->Aml;
*385cc6b4SJerry Jelinek        if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP)
*385cc6b4SJerry Jelinek        {
*385cc6b4SJerry Jelinek            ParserState->Aml++;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            PkgEnd = ParserState->Aml;
*385cc6b4SJerry Jelinek            PkgLength = AcpiPsGetNextPackageLength (ParserState);
*385cc6b4SJerry Jelinek            PkgEnd += PkgLength;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            if (ParserState->Aml < PkgEnd)
*385cc6b4SJerry Jelinek            {
*385cc6b4SJerry Jelinek                /* Non-empty list */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, Aml);
*385cc6b4SJerry Jelinek                if (!Arg)
*385cc6b4SJerry Jelinek                {
*385cc6b4SJerry Jelinek                    AcpiPsFreeOp (Field);
*385cc6b4SJerry Jelinek                    return_PTR (NULL);
*385cc6b4SJerry Jelinek                }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                /* Get the actual buffer length argument */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                Opcode = ACPI_GET8 (ParserState->Aml);
*385cc6b4SJerry Jelinek                ParserState->Aml++;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                switch (Opcode)
*385cc6b4SJerry Jelinek                {
*385cc6b4SJerry Jelinek                case AML_BYTE_OP:       /* AML_BYTEDATA_ARG */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                    BufferLength = ACPI_GET8 (ParserState->Aml);
*385cc6b4SJerry Jelinek                    ParserState->Aml += 1;
*385cc6b4SJerry Jelinek                    break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                case AML_WORD_OP:       /* AML_WORDDATA_ARG */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                    BufferLength = ACPI_GET16 (ParserState->Aml);
*385cc6b4SJerry Jelinek                    ParserState->Aml += 2;
*385cc6b4SJerry Jelinek                    break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                case AML_DWORD_OP:      /* AML_DWORDATA_ARG */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                    BufferLength = ACPI_GET32 (ParserState->Aml);
*385cc6b4SJerry Jelinek                    ParserState->Aml += 4;
*385cc6b4SJerry Jelinek                    break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                default:
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                    BufferLength = 0;
*385cc6b4SJerry Jelinek                    break;
*385cc6b4SJerry Jelinek                }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                /* Fill in bytelist data */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek                Arg->Named.Value.Size = BufferLength;
*385cc6b4SJerry Jelinek                Arg->Named.Data = ParserState->Aml;
*385cc6b4SJerry Jelinek            }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            /* Skip to End of byte data */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            ParserState->Aml = PkgEnd;
*385cc6b4SJerry Jelinek        }
*385cc6b4SJerry Jelinek        else
*385cc6b4SJerry Jelinek        {
*385cc6b4SJerry Jelinek            Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Aml);
*385cc6b4SJerry Jelinek            if (!Arg)
*385cc6b4SJerry Jelinek            {
*385cc6b4SJerry Jelinek                AcpiPsFreeOp (Field);
*385cc6b4SJerry Jelinek                return_PTR (NULL);
*385cc6b4SJerry Jelinek            }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            /* Get the Namestring argument */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek            Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
*385cc6b4SJerry Jelinek        }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        /* Link the buffer/namestring to parent (CONNECTION_OP) */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek        AcpiPsAppendArg (Field, Arg);
*385cc6b4SJerry Jelinek        break;
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek
db2bae30SDana Myers    default:
db2bae30SDana Myers
db2bae30SDana Myers        /* Opcode was set in previous switch */
db2bae30SDana Myers        break;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_PTR (Field);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiPsGetNextArg
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  WalkState           - Current state
db2bae30SDana Myers *              ParserState         - Current parser state object
db2bae30SDana Myers *              ArgType             - The argument type (AML_*_ARG)
db2bae30SDana Myers *              ReturnArg           - Where the next arg is returned
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status, and an op object containing the next argument.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Get next argument (including complex list arguments that require
db2bae30SDana Myers *              pushing the parser stack)
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiPsGetNextArg (
db2bae30SDana Myers    ACPI_WALK_STATE         *WalkState,
db2bae30SDana Myers    ACPI_PARSE_STATE        *ParserState,
db2bae30SDana Myers    UINT32                  ArgType,
db2bae30SDana Myers    ACPI_PARSE_OBJECT       **ReturnArg)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Arg = NULL;
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Prev = NULL;
db2bae30SDana Myers    ACPI_PARSE_OBJECT       *Field;
db2bae30SDana Myers    UINT32                  Subop;
db2bae30SDana Myers    ACPI_STATUS             Status = AE_OK;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    switch (ArgType)
db2bae30SDana Myers    {
db2bae30SDana Myers    case ARGP_BYTEDATA:
db2bae30SDana Myers    case ARGP_WORDDATA:
db2bae30SDana Myers    case ARGP_DWORDDATA:
db2bae30SDana Myers    case ARGP_CHARLIST:
db2bae30SDana Myers    case ARGP_NAME:
db2bae30SDana Myers    case ARGP_NAMESTRING:
db2bae30SDana Myers
db2bae30SDana Myers        /* Constants, strings, and namestrings are all the same size */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek        Arg = AcpiPsAllocOp (AML_BYTE_OP, ParserState->Aml);
db2bae30SDana Myers        if (!Arg)
db2bae30SDana Myers        {
db2bae30SDana Myers            return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers        }
*385cc6b4SJerry Jelinek
db2bae30SDana Myers        AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_PKGLENGTH:
db2bae30SDana Myers
db2bae30SDana Myers        /* Package length, nothing returned */
db2bae30SDana Myers
db2bae30SDana Myers        ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState);
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_FIELDLIST:
db2bae30SDana Myers
db2bae30SDana Myers        if (ParserState->Aml < ParserState->PkgEnd)
db2bae30SDana Myers        {
db2bae30SDana Myers            /* Non-empty list */
db2bae30SDana Myers
db2bae30SDana Myers            while (ParserState->Aml < ParserState->PkgEnd)
db2bae30SDana Myers            {
db2bae30SDana Myers                Field = AcpiPsGetNextField (ParserState);
db2bae30SDana Myers                if (!Field)
db2bae30SDana Myers                {
db2bae30SDana Myers                    return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers                }
db2bae30SDana Myers
db2bae30SDana Myers                if (Prev)
db2bae30SDana Myers                {
db2bae30SDana Myers                    Prev->Common.Next = Field;
db2bae30SDana Myers                }
db2bae30SDana Myers                else
db2bae30SDana Myers                {
db2bae30SDana Myers                    Arg = Field;
db2bae30SDana Myers                }
db2bae30SDana Myers                Prev = Field;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* Skip to End of byte data */
db2bae30SDana Myers
db2bae30SDana Myers            ParserState->Aml = ParserState->PkgEnd;
db2bae30SDana Myers        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_BYTELIST:
db2bae30SDana Myers
db2bae30SDana Myers        if (ParserState->Aml < ParserState->PkgEnd)
db2bae30SDana Myers        {
db2bae30SDana Myers            /* Non-empty list */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek            Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP,
*385cc6b4SJerry Jelinek                ParserState->Aml);
db2bae30SDana Myers            if (!Arg)
db2bae30SDana Myers            {
db2bae30SDana Myers                return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* Fill in bytelist data */
db2bae30SDana Myers
db2bae30SDana Myers            Arg->Common.Value.Size = (UINT32)
db2bae30SDana Myers                ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml);
db2bae30SDana Myers            Arg->Named.Data = ParserState->Aml;
db2bae30SDana Myers
db2bae30SDana Myers            /* Skip to End of byte data */
db2bae30SDana Myers
db2bae30SDana Myers            ParserState->Aml = ParserState->PkgEnd;
db2bae30SDana Myers        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_TARGET:
db2bae30SDana Myers    case ARGP_SUPERNAME:
db2bae30SDana Myers    case ARGP_SIMPLENAME:
*385cc6b4SJerry Jelinek    case ARGP_NAME_OR_REF:
db2bae30SDana Myers
db2bae30SDana Myers        Subop = AcpiPsPeekOpcode (ParserState);
db2bae30SDana Myers        if (Subop == 0                  ||
db2bae30SDana Myers            AcpiPsIsLeadingChar (Subop) ||
*385cc6b4SJerry Jelinek            ACPI_IS_ROOT_PREFIX (Subop) ||
*385cc6b4SJerry Jelinek            ACPI_IS_PARENT_PREFIX (Subop))
db2bae30SDana Myers        {
db2bae30SDana Myers            /* NullName or NameString */
db2bae30SDana Myers
*385cc6b4SJerry Jelinek            Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml);
db2bae30SDana Myers            if (!Arg)
db2bae30SDana Myers            {
db2bae30SDana Myers                return_ACPI_STATUS (AE_NO_MEMORY);
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* To support SuperName arg of Unload */
db2bae30SDana Myers
db2bae30SDana Myers            if (WalkState->Opcode == AML_UNLOAD_OP)
db2bae30SDana Myers            {
*385cc6b4SJerry Jelinek                Status = AcpiPsGetNextNamepath (WalkState, ParserState,
*385cc6b4SJerry Jelinek                    Arg, ACPI_POSSIBLE_METHOD_CALL);
db2bae30SDana Myers
db2bae30SDana Myers                /*
*385cc6b4SJerry Jelinek                 * If the SuperName argument is a method call, we have
*385cc6b4SJerry Jelinek                 * already restored the AML pointer, just free this Arg
db2bae30SDana Myers                 */
db2bae30SDana Myers                if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP)
db2bae30SDana Myers                {
db2bae30SDana Myers                    AcpiPsFreeOp (Arg);
db2bae30SDana Myers                    Arg = NULL;
db2bae30SDana Myers                }
db2bae30SDana Myers            }
db2bae30SDana Myers            else
db2bae30SDana Myers            {
*385cc6b4SJerry Jelinek                Status = AcpiPsGetNextNamepath (WalkState, ParserState,
*385cc6b4SJerry Jelinek                    Arg, ACPI_NOT_METHOD_CALL);
db2bae30SDana Myers            }
db2bae30SDana Myers        }
db2bae30SDana Myers        else
db2bae30SDana Myers        {
db2bae30SDana Myers            /* Single complex argument, nothing returned */
db2bae30SDana Myers
db2bae30SDana Myers            WalkState->ArgCount = 1;
db2bae30SDana Myers        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_DATAOBJ:
db2bae30SDana Myers    case ARGP_TERMARG:
db2bae30SDana Myers
db2bae30SDana Myers        /* Single complex argument, nothing returned */
db2bae30SDana Myers
db2bae30SDana Myers        WalkState->ArgCount = 1;
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    case ARGP_DATAOBJLIST:
db2bae30SDana Myers    case ARGP_TERMLIST:
db2bae30SDana Myers    case ARGP_OBJLIST:
db2bae30SDana Myers
db2bae30SDana Myers        if (ParserState->Aml < ParserState->PkgEnd)
db2bae30SDana Myers        {
db2bae30SDana Myers            /* Non-empty list of variable arguments, nothing returned */
db2bae30SDana Myers
db2bae30SDana Myers            WalkState->ArgCount = ACPI_VAR_ARGS;
db2bae30SDana Myers        }
db2bae30SDana Myers        break;
db2bae30SDana Myers
db2bae30SDana Myers    default:
db2bae30SDana Myers
26f3cdf0SGordon Ross        ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType));
db2bae30SDana Myers        Status = AE_AML_OPERAND_TYPE;
db2bae30SDana Myers        break;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    *ReturnArg = Arg;
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}