C++ AcpiExResolveToValue函数代码示例

ACPI_STATUS
AcpiDsResolveOperands (
    ACPI_WALK_STATE         *WalkState)
{
    UINT32                  i;
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE_PTR (DsResolveOperands, WalkState);


    /*
     * Attempt to resolve each of the valid operands
     * Method arguments are passed by reference, not by value. This means
     * that the actual objects are passed, not copies of the objects.
     */
    for (i = 0; i < WalkState->NumOperands; i++)
    {
        Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState);
        if (ACPI_FAILURE (Status))
        {
            break;
        }
    }

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDsEvaluateNamePath (
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_PARSE_OBJECT       *Op = WalkState->Op;
    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
    ACPI_OPERAND_OBJECT     *NewObjDesc;
    UINT8                   Type;


    ACPI_FUNCTION_TRACE_PTR (DsEvaluateNamePath, WalkState);


    if (!Op->Common.Parent)
    {
        /* This happens after certain exception processing */

        goto Exit;
    }

    if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
        (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
        (Op->Common.Parent->Common.AmlOpcode == AML_REF_OF_OP))
    {
        /* TBD: Should we specify this feature as a bit of OpInfo->Flags of these opcodes? */

        goto Exit;
    }

    Status = AcpiDsCreateOperand (WalkState, Op, 0);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (Op->Common.Flags & ACPI_PARSEOP_TARGET)
    {
        NewObjDesc = *Operand;
        goto PushResult;
    }

    Type = (*Operand)->Common.Type;

    Status = AcpiExResolveToValue (Operand, WalkState);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    if (Type == ACPI_TYPE_INTEGER)
    {
        /* It was incremented by AcpiExResolveToValue */

        AcpiUtRemoveReference (*Operand);

        Status = AcpiUtCopyIobjectToIobject (*Operand, &NewObjDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            goto Exit;
        }
    }
    else
    {
        /*
         * The object either was anew created or is
         * a Namespace node - don't decrement it.
         */
        NewObjDesc = *Operand;
    }

    /* Cleanup for name-path operand */

    Status = AcpiDsObjStackPop (1, WalkState);
    if (ACPI_FAILURE (Status))
    {
        WalkState->ResultObj = NewObjDesc;
        goto Exit;
    }

PushResult:

    WalkState->ResultObj = NewObjDesc;

    Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
    if (ACPI_SUCCESS (Status))
    {
        /* Force to take it from stack */

        Op->Common.Flags |= ACPI_PARSEOP_IN_STACK;
    }

Exit:

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiExResolveObject (
    ACPI_OPERAND_OBJECT     **SourceDescPtr,
    ACPI_OBJECT_TYPE        TargetType,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     *SourceDesc = *SourceDescPtr;
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (ExResolveObject);


    /* Ensure we have a Target that can be stored to */

    switch (TargetType)
    {
    case ACPI_TYPE_BUFFER_FIELD:
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:
        /*
         * These cases all require only Integers or values that
         * can be converted to Integers (Strings or Buffers)
         */

    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:

        /*
         * Stores into a Field/Region or into a Integer/Buffer/String
         * are all essentially the same.  This case handles the
         * "interchangeable" types Integer, String, and Buffer.
         */
        if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
        {
            /* Resolve a reference object first */

            Status = AcpiExResolveToValue (SourceDescPtr, WalkState);
            if (ACPI_FAILURE (Status))
            {
                break;
            }
        }

        /* For CopyObject, no further validation necessary */

        if (WalkState->Opcode == AML_COPY_OP)
        {
            break;
        }

        /* Must have a Integer, Buffer, or String */

        if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER)    &&
            (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)     &&
            (SourceDesc->Common.Type != ACPI_TYPE_STRING)     &&
            !((SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                    (SourceDesc->Reference.Class== ACPI_REFCLASS_TABLE)))
        {
            /* Conversion successful but still not a valid type */

            ACPI_ERROR ((AE_INFO,
                "Cannot assign type %s to %s (must be type Int/Str/Buf)",
                AcpiUtGetObjectTypeName (SourceDesc),
                AcpiUtGetTypeName (TargetType)));
            Status = AE_AML_OPERAND_TYPE;
        }
        break;


    case ACPI_TYPE_LOCAL_ALIAS:
    case ACPI_TYPE_LOCAL_METHOD_ALIAS:

        /*
         * All aliases should have been resolved earlier, during the
         * operand resolution phase.
         */
        ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object"));
        Status = AE_AML_INTERNAL;
        break;


    case ACPI_TYPE_PACKAGE:
    default:

        /*
         * All other types than Alias and the various Fields come here,
         * including the untyped case - ACPI_TYPE_ANY.
         */
        break;
    }

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDsEvalBankFieldOperands (
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *OperandDesc;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_PARSE_OBJECT       *NextOp;
    ACPI_PARSE_OBJECT       *Arg;


    ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);


    /*
     * This is where we evaluate the BankValue field of the
     * BankField declaration
     */

    /* NextOp points to the op that holds the Region */

    NextOp = Op->Common.Value.Arg;

    /* NextOp points to the op that holds the Bank Register */

    NextOp = NextOp->Common.Next;

    /* NextOp points to the op that holds the Bank Value */

    NextOp = NextOp->Common.Next;

    /*
     * Set proper index into operand stack for AcpiDsObjStackPush
     * invoked inside AcpiDsCreateOperand.
     *
     * We use WalkState->Operands[0] to store the evaluated BankValue
     */
    WalkState->OperandIndex = 0;

    Status = AcpiDsCreateOperand (WalkState, NextOp, 0);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    Status = AcpiExResolveToValue (&WalkState->Operands[0], WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,
        AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);
    /*
     * Get the BankValue operand and save it
     * (at Top of stack)
     */
    OperandDesc = WalkState->Operands[0];

    /* Arg points to the start Bank Field */

    Arg = AcpiPsGetArg (Op, 4);
    while (Arg)
    {
        /* Ignore OFFSET and ACCESSAS terms here */

        if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
        {
            Node = Arg->Common.Node;

            ObjDesc = AcpiNsGetAttachedObject (Node);
            if (!ObjDesc)
            {
                return_ACPI_STATUS (AE_NOT_EXIST);
            }

            ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;
        }

        /* Move to next field in the list */

        Arg = Arg->Common.Next;
    }

    AcpiUtRemoveReference (OperandDesc);
    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........
        ControlState = AcpiUtPopGenericState (&WalkState->ControlState);
        AcpiUtDeleteGenericState (ControlState);
        break;

    case AML_RETURN_OP:

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
            "[RETURN_OP] Op=%p Arg=%p\n",Op, Op->Common.Value.Arg));

        /*
         * One optional operand -- the return value
         * It can be either an immediate operand or a result that
         * has been bubbled up the tree
         */
        if (Op->Common.Value.Arg)
        {
            /* Since we have a real Return(), delete any implicit return */

            AcpiDsClearImplicitReturn (WalkState);

            /* Return statement has an immediate operand */

            Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }

            /*
             * If value being returned is a Reference (such as
             * an arg or local), resolve it now because it may
             * cease to exist at the end of the method.
             */
            Status = AcpiExResolveToValue (
                &WalkState->Operands [0], WalkState);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }

            /*
             * Get the return value and save as the last result
             * value. This is the only place where WalkState->ReturnDesc
             * is set to anything other than zero!
             */
            WalkState->ReturnDesc = WalkState->Operands[0];
        }
        else if (WalkState->ResultCount)
        {
            /* Since we have a real Return(), delete any implicit return */

            AcpiDsClearImplicitReturn (WalkState);

            /*
             * The return value has come from a previous calculation.
             *
             * If value being returned is a Reference (such as
             * an arg or local), resolve it now because it may
             * cease to exist at the end of the method.
             *
             * Allow references created by the Index operator to return
             * unchanged.
             */
            if ((ACPI_GET_DESCRIPTOR_TYPE (WalkState->Results->Results.ObjDesc[0]) ==
                    ACPI_DESC_TYPE_OPERAND) &&
                ((WalkState->Results->Results.ObjDesc [0])->Common.Type ==

ACPI_STATUS
AcpiDsGetPredicateValue (
    ACPI_WALK_STATE         *WalkState,
    ACPI_OPERAND_OBJECT     *ResultObj)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;


    ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);


    WalkState->ControlState->Common.State = 0;

    if (ResultObj)
    {
        Status = AcpiDsResultPop (&ObjDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "Could not get result from predicate evaluation"));

            return_ACPI_STATUS (Status);
        }
    }
    else
    {
        Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        ObjDesc = WalkState->Operands [0];
    }

    if (!ObjDesc)
    {
        ACPI_ERROR ((AE_INFO,
            "No predicate ObjDesc=%p State=%p",
            ObjDesc, WalkState));

        return_ACPI_STATUS (AE_AML_NO_OPERAND);
    }

    /*
     * Result of predicate evaluation must be an Integer
     * object. Implicitly convert the argument if necessary.
     */
    Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
    {
        ACPI_ERROR ((AE_INFO,
            "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
            ObjDesc, WalkState, ObjDesc->Common.Type));

        Status = AE_AML_OPERAND_TYPE;
        goto Cleanup;
    }

    /* Truncate the predicate to 32-bits if necessary */

    (void) AcpiExTruncateFor32bitTable (LocalObjDesc);

    /*
     * Save the result of the predicate evaluation on
     * the control stack
     */
    if (LocalObjDesc->Integer.Value)
    {
        WalkState->ControlState->Common.Value = TRUE;
    }
    else
    {
        /*
         * Predicate is FALSE, we will just toss the
         * rest of the package
         */
        WalkState->ControlState->Common.Value = FALSE;
        Status = AE_CTRL_FALSE;
    }

    /* Predicate can be used for an implicit return value */

    (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);


Cleanup:
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            Status = AcpiExCheckObjectType (ACPI_TYPE_LOCAL_REFERENCE,
                            ObjectType, ObjDesc);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
            goto NextOperand;


        case ARGI_DATAREFOBJ:  /* Store operator only */

            /*
             * We don't want to resolve IndexOp reference objects during
             * a store because this would be an implicit DeRefOf operation.
             * Instead, we just want to store the reference object.
             * -- All others must be resolved below.
             */
            if ((Opcode == AML_STORE_OP) &&
                ((*StackPtr)->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                ((*StackPtr)->Reference.Class == ACPI_REFCLASS_INDEX))
            {
                goto NextOperand;
            }
            break;

        default:
            /* All cases covered above */
            break;
        }

        /*
         * Resolve this object to a value
         */
        Status = AcpiExResolveToValue (StackPtr, WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        /* Get the resolved object */

        ObjDesc = *StackPtr;

        /*
         * Check the resulting object (value) type
         */
        switch (ThisArgType)
        {
        /*
         * For the simple cases, only one type of resolved object
         * is allowed
         */
        case ARGI_MUTEX:

            /* Need an operand of type ACPI_TYPE_MUTEX */

            TypeNeeded = ACPI_TYPE_MUTEX;
            break;

        case ARGI_EVENT:

            /* Need an operand of type ACPI_TYPE_EVENT */

            TypeNeeded = ACPI_TYPE_EVENT;
            break;

ACPI_STATUS
AcpiExResolveObject (
    ACPI_OPERAND_OBJECT     **SourceDescPtr,
    ACPI_OBJECT_TYPE        TargetType,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     *SourceDesc = *SourceDescPtr;
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE ("ExResolveObject");


    /*
     * Ensure we have a Target that can be stored to
     */
    switch (TargetType)
    {
    case ACPI_TYPE_BUFFER_FIELD:
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:
        /*
         * These cases all require only Integers or values that
         * can be converted to Integers (Strings or Buffers)
         */

    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:

        /*
         * Stores into a Field/Region or into a Integer/Buffer/String
         * are all essentially the same.  This case handles the
         * "interchangeable" types Integer, String, and Buffer.
         */
        if (ACPI_GET_OBJECT_TYPE (SourceDesc) == ACPI_TYPE_LOCAL_REFERENCE)
        {
            /* Resolve a reference object first */

            Status = AcpiExResolveToValue (SourceDescPtr, WalkState);
            if (ACPI_FAILURE (Status))
            {
                break;
            }
        }

        /*
         * Must have a Integer, Buffer, or String
         */
        if ((ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER)     &&
            (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER)      &&
            (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING))
        {
            /*
             * Conversion successful but still not a valid type
             */
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
                "Cannot assign type %s to %s (must be type Int/Str/Buf)\n",
                AcpiUtGetObjectTypeName (SourceDesc),
                AcpiUtGetTypeName (TargetType)));
            Status = AE_AML_OPERAND_TYPE;
        }
        break;


    case ACPI_TYPE_LOCAL_ALIAS:

        /*
         * Aliases are resolved by AcpiExPrepOperands
         */
        ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into Alias - should never happen\n"));
        Status = AE_AML_INTERNAL;
        break;


    case ACPI_TYPE_PACKAGE:
    default:

        /*
         * All other types than Alias and the various Fields come here,
         * including the untyped case - ACPI_TYPE_ANY.
         */
        break;
    }

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDsExecEndControlOp (
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_GENERIC_STATE      *ControlState;


    ACPI_FUNCTION_NAME ("DsExecEndControlOp");


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

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", Op));

        /*
         * Save the result of the predicate in case there is an
         * ELSE to come
         */
        WalkState->LastPredicate =
            (BOOLEAN) WalkState->ControlState->Common.Value;

        /*
         * Pop the control state that was created at the start
         * of the IF and free it
         */
        ControlState = AcpiUtPopGenericState (&WalkState->ControlState);
        AcpiUtDeleteGenericState (ControlState);
        break;


    case AML_ELSE_OP:

        break;


    case AML_WHILE_OP:

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", Op));

        if (WalkState->ControlState->Common.Value)
        {
            /* Predicate was true, go back and evaluate it again! */

            Status = AE_CTRL_PENDING;
        }

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[WHILE_OP] termination! Op=%p\n", Op));

        /* Pop this control state and free it */

        ControlState = AcpiUtPopGenericState (&WalkState->ControlState);

        WalkState->AmlLastWhile = ControlState->Control.AmlPredicateStart;
        AcpiUtDeleteGenericState (ControlState);
        break;


    case AML_RETURN_OP:

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
            "[RETURN_OP] Op=%p Arg=%p\n",Op, Op->Common.Value.Arg));

        /*
         * One optional operand -- the return value
         * It can be either an immediate operand or a result that
         * has been bubbled up the tree
         */
        if (Op->Common.Value.Arg)
        {
            /* Return statement has an immediate operand */

            Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }

            /*
             * If value being returned is a Reference (such as
             * an arg or local), resolve it now because it may
             * cease to exist at the end of the method.
             */
            Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }

            /*
             * Get the return value and save as the last result
             * value.  This is the only place where WalkState->ReturnDesc
             * is set to anything other than zero!
             */
            WalkState->ReturnDesc = WalkState->Operands[0];
        }
        else if ((WalkState->Results) &&
//.........这里部分代码省略.........