dsmthdat.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "acinterp.h"

Include dependency graph for dsmthdat.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_DISPATCHER

Functions
static void	AcpiDsMethodDataDeleteValue (UINT8 Type, UINT32 Index, ACPI_WALK_STATE *WalkState)
static ACPI_STATUS	AcpiDsMethodDataSetValue (UINT8 Type, UINT32 Index, ACPI_OPERAND_OBJECT *Object, ACPI_WALK_STATE *WalkState)
void	AcpiDsMethodDataInit (ACPI_WALK_STATE *WalkState)
void	AcpiDsMethodDataDeleteAll (ACPI_WALK_STATE *WalkState)
ACPI_STATUS	AcpiDsMethodDataInitArgs (ACPI_OPERAND_OBJECT **Params, UINT32 MaxParamCount, ACPI_WALK_STATE *WalkState)
ACPI_STATUS	AcpiDsMethodDataGetNode (UINT8 Type, UINT32 Index, ACPI_WALK_STATE *WalkState, ACPI_NAMESPACE_NODE **Node)
ACPI_STATUS	AcpiDsMethodDataGetValue (UINT8 Type, UINT32 Index, ACPI_WALK_STATE *WalkState, ACPI_OPERAND_OBJECT **DestDesc)
ACPI_STATUS	AcpiDsStoreObjectToLocal (UINT8 Type, UINT32 Index, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_WALK_STATE *WalkState)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_DISPATCHER

Definition at line 51 of file dsmthdat.c.

Function Documentation

AcpiDsMethodDataDeleteAll()

void AcpiDsMethodDataDeleteAll

(

ACPI_WALK_STATE *

WalkState

)

Definition at line 153 of file dsmthdat.c.

{
    UINT32                  Index;
 
 
    ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll);
 
 
    /* Detach the locals */
 
    for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++)
    {
        if (WalkState->LocalVariables[Index].Object)
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%u=%p\n",
                Index, WalkState->LocalVariables[Index].Object));
 
            /* Detach object (if present) and remove a reference */
 
            AcpiNsDetachObject (&WalkState->LocalVariables[Index]);
        }
    }
 
    /* Detach the arguments */
 
    for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++)
    {
        if (WalkState->Arguments[Index].Object)
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%u=%p\n",
                Index, WalkState->Arguments[Index].Object));
 
            /* Detach object (if present) and remove a reference */
 
            AcpiNsDetachObject (&WalkState->Arguments[Index]);
        }
    }
 
    return_VOID;
}

Referenced by AcpiDsTerminateControlMethod().

AcpiDsMethodDataDeleteValue()

static void AcpiDsMethodDataDeleteValue ( UINT8  Type, UINT32  Index, ACPI_WALK_STATE *  WalkState  )

static

Definition at line 519 of file dsmthdat.c.

{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *Object;
 
 
    ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue);
 
 
    /* Get the namespace node for the arg/local */
 
    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_VOID;
    }
 
    /* Get the associated object */
 
    Object = AcpiNsGetAttachedObject (Node);
 
    /*
     * Undefine the Arg or Local by setting its descriptor
     * pointer to NULL. Locals/Args can contain both
     * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
     */
    Node->Object = NULL;
 
    if ((Object) &&
        (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND))
    {
        /*
         * There is a valid object.
         * Decrement the reference count by one to balance the
         * increment when the object was stored.
         */
        AcpiUtRemoveReference (Object);
    }
 
    return_VOID;
}

Referenced by AcpiDsStoreObjectToLocal().

AcpiDsMethodDataGetNode()

ACPI_STATUS AcpiDsMethodDataGetNode	(	UINT8	Type,
		UINT32	Index,
		ACPI_WALK_STATE *	WalkState,
		ACPI_NAMESPACE_NODE **	Node
	)

Definition at line 275 of file dsmthdat.c.

{
    ACPI_FUNCTION_TRACE (DsMethodDataGetNode);
 
 
    /*
     * Method Locals and Arguments are supported
     */
    switch (Type)
    {
    case ACPI_REFCLASS_LOCAL:
 
        if (Index > ACPI_METHOD_MAX_LOCAL)
        {
            ACPI_ERROR ((AE_INFO,
                "Local index %u is invalid (max %u)",
                Index, ACPI_METHOD_MAX_LOCAL));
            return_ACPI_STATUS (AE_AML_INVALID_INDEX);
        }
 
        /* Return a pointer to the pseudo-node */
 
        *Node = &WalkState->LocalVariables[Index];
        break;
 
    case ACPI_REFCLASS_ARG:
 
        if (Index > ACPI_METHOD_MAX_ARG)
        {
            ACPI_ERROR ((AE_INFO,
                "Arg index %u is invalid (max %u)",
                Index, ACPI_METHOD_MAX_ARG));
            return_ACPI_STATUS (AE_AML_INVALID_INDEX);
        }
 
        /* Return a pointer to the pseudo-node */
 
        *Node = &WalkState->Arguments[Index];
        break;
 
    default:
 
        ACPI_ERROR ((AE_INFO, "Type %u is invalid", Type));
        return_ACPI_STATUS (AE_TYPE);
    }
 
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiDsInitObjectFromOp(), AcpiDsMethodDataDeleteValue(), AcpiDsMethodDataGetValue(), AcpiDsMethodDataSetValue(), AcpiDsStoreObjectToLocal(), and AcpiExResolveMultiple().

AcpiDsMethodDataGetValue()

ACPI_STATUS AcpiDsMethodDataGetValue	(	UINT8	Type,
		UINT32	Index,
		ACPI_WALK_STATE *	WalkState,
		ACPI_OPERAND_OBJECT **	DestDesc
	)

Definition at line 406 of file dsmthdat.c.

{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *Object;
 
 
    ACPI_FUNCTION_TRACE (DsMethodDataGetValue);
 
 
    /* Validate the object descriptor */
 
    if (!DestDesc)
    {
        ACPI_ERROR ((AE_INFO, "Null object descriptor pointer"));
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    /* Get the namespace node for the arg/local */
 
    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Get the object from the node */
 
    Object = Node->Object;
 
    /* Examine the returned object, it must be valid. */
 
    if (!Object)
    {
        /*
         * Index points to uninitialized object.
         * This means that either 1) The expected argument was
         * not passed to the method, or 2) A local variable
         * was referenced by the method (via the ASL)
         * before it was initialized. Either case is an error.
         */
 
        /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */
 
        if (AcpiGbl_EnableInterpreterSlack)
        {
            Object = AcpiUtCreateIntegerObject ((UINT64) 0);
            if (!Object)
            {
                return_ACPI_STATUS (AE_NO_MEMORY);
            }
 
            Node->Object = Object;
        }
 
        /* Otherwise, return the error */
 
        else switch (Type)
        {
        case ACPI_REFCLASS_ARG:
 
            ACPI_ERROR ((AE_INFO,
                "Uninitialized Arg[%u] at node %p",
                Index, Node));
 
            return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);
 
        case ACPI_REFCLASS_LOCAL:
            /*
             * No error message for this case, will be trapped again later to
             * detect and ignore cases of Store(LocalX,LocalX)
             */
            return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);
 
        default:
 
            ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X", Type));
            return_ACPI_STATUS (AE_AML_INTERNAL);
        }
    }
 
    /*
     * The Index points to an initialized and valid object.
     * Return an additional reference to the object
     */
    *DestDesc = Object;
    AcpiUtAddReference (Object);
 
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiExOpcode_1A_0T_1R(), AcpiExResolveMultiple(), and AcpiExResolveObjectToValue().

AcpiDsMethodDataInit()

void AcpiDsMethodDataInit

(

ACPI_WALK_STATE *

WalkState

)

Definition at line 100 of file dsmthdat.c.

{
    UINT32                  i;
 
 
    ACPI_FUNCTION_TRACE (DsMethodDataInit);
 
 
    /* Init the method arguments */
 
    for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
    {
        ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name,
            NAMEOF_ARG_NTE);
 
        WalkState->Arguments[i].Name.Integer |= (i << 24);
        WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED;
        WalkState->Arguments[i].Type = ACPI_TYPE_ANY;
        WalkState->Arguments[i].Flags = ANOBJ_METHOD_ARG;
    }
 
    /* Init the method locals */
 
    for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)
    {
        ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name,
            NAMEOF_LOCAL_NTE);
 
        WalkState->LocalVariables[i].Name.Integer |= (i << 24);
        WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED;
        WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY;
        WalkState->LocalVariables[i].Flags = ANOBJ_METHOD_LOCAL;
    }
 
    return_VOID;
}

Referenced by AcpiDsCreateWalkState().

AcpiDsMethodDataInitArgs()

ACPI_STATUS AcpiDsMethodDataInitArgs	(	ACPI_OPERAND_OBJECT **	Params,
		UINT32	MaxParamCount,
		ACPI_WALK_STATE *	WalkState
	)

Definition at line 213 of file dsmthdat.c.

{
    ACPI_STATUS             Status;
    UINT32                  Index = 0;
 
 
    ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params);
 
 
    if (!Params)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "No parameter list passed to method\n"));
        return_ACPI_STATUS (AE_OK);
    }
 
    /* Copy passed parameters into the new method stack frame */
 
    while ((Index < ACPI_METHOD_NUM_ARGS) &&
           (Index < MaxParamCount)        &&
            Params[Index])
    {
        /*
         * A valid parameter.
         * Store the argument in the method/walk descriptor.
         * Do not copy the arg in order to implement call by reference
         */
        Status = AcpiDsMethodDataSetValue (
            ACPI_REFCLASS_ARG, Index, Params[Index], WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
 
        Index++;
    }
 
    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%u args passed to method\n", Index));
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiDsInitAmlWalk().

AcpiDsMethodDataSetValue()

static ACPI_STATUS AcpiDsMethodDataSetValue ( UINT8  Type, UINT32  Index, ACPI_OPERAND_OBJECT *  Object, ACPI_WALK_STATE *  WalkState  )

static

Definition at line 347 of file dsmthdat.c.

{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
 
 
    ACPI_FUNCTION_TRACE (DsMethodDataSetValue);
 
 
    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
        "NewObj %p Type %2.2X, Refs=%u [%s]\n", Object,
        Type, Object->Common.ReferenceCount,
        AcpiUtGetTypeName (Object->Common.Type)));
 
    /* Get the namespace node for the arg/local */
 
    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /*
     * Increment ref count so object can't be deleted while installed.
     * NOTE: We do not copy the object in order to preserve the call by
     * reference semantics of ACPI Control Method invocation.
     * (See ACPI Specification 2.0C)
     */
    AcpiUtAddReference (Object);
 
    /* Install the object */
 
    Node->Object = Object;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsMethodDataInitArgs(), and AcpiDsStoreObjectToLocal().

AcpiDsStoreObjectToLocal()

ACPI_STATUS AcpiDsStoreObjectToLocal	(	UINT8	Type,
		UINT32	Index,
		ACPI_OPERAND_OBJECT *	ObjDesc,
		ACPI_WALK_STATE *	WalkState
	)

Definition at line 585 of file dsmthdat.c.

{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *CurrentObjDesc;
    ACPI_OPERAND_OBJECT     *NewObjDesc;
 
 
    ACPI_FUNCTION_TRACE (DsStoreObjectToLocal);
    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",
        Type, Index, ObjDesc));
 
    /* Parameter validation */
 
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    /* Get the namespace node for the arg/local */
 
    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    CurrentObjDesc = AcpiNsGetAttachedObject (Node);
    if (CurrentObjDesc == ObjDesc)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n",
            ObjDesc));
        return_ACPI_STATUS (Status);
    }
 
    /*
     * If the reference count on the object is more than one, we must
     * take a copy of the object before we store. A reference count
     * of exactly 1 means that the object was just created during the
     * evaluation of an expression, and we can safely use it since it
     * is not used anywhere else.
     */
    NewObjDesc = ObjDesc;
    if (ObjDesc->Common.ReferenceCount > 1)
    {
        Status = AcpiUtCopyIobjectToIobject (
            ObjDesc, &NewObjDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }
 
    /*
     * If there is an object already in this slot, we either
     * have to delete it, or if this is an argument and there
     * is an object reference stored there, we have to do
     * an indirect store!
     */
    if (CurrentObjDesc)
    {
        /*
         * Check for an indirect store if an argument
         * contains an object reference (stored as an Node).
         * We don't allow this automatic dereferencing for
         * locals, since a store to a local should overwrite
         * anything there, including an object reference.
         *
         * If both Arg0 and Local0 contain RefOf (Local4):
         *
         * Store (1, Arg0)             - Causes indirect store to local4
         * Store (1, Local0)           - Stores 1 in local0, overwriting
         *                                  the reference to local4
         * Store (1, DeRefof (Local0)) - Causes indirect store to local4
         *
         * Weird, but true.
         */
        if (Type == ACPI_REFCLASS_ARG)
        {
            /*
             * If we have a valid reference object that came from RefOf(),
             * do the indirect store
             */
            if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) ==
                    ACPI_DESC_TYPE_OPERAND) &&
                (CurrentObjDesc->Common.Type ==
                    ACPI_TYPE_LOCAL_REFERENCE) &&
                (CurrentObjDesc->Reference.Class ==
                    ACPI_REFCLASS_REFOF))
            {
                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                    "Arg (%p) is an ObjRef(Node), storing in node %p\n",
                    NewObjDesc, CurrentObjDesc));
 
                /*
                 * Store this object to the Node (perform the indirect store)
                 * NOTE: No implicit conversion is performed, as per the ACPI
                 * specification rules on storing to Locals/Args.
                 */
                Status = AcpiExStoreObjectToNode (NewObjDesc,
                    CurrentObjDesc->Reference.Object, WalkState,
                    ACPI_NO_IMPLICIT_CONVERSION);
 
                /* Remove local reference if we copied the object above */
 
                if (NewObjDesc != ObjDesc)
                {
                    AcpiUtRemoveReference (NewObjDesc);
                }
 
                return_ACPI_STATUS (Status);
            }
        }
 
        /* Delete the existing object before storing the new one */
 
        AcpiDsMethodDataDeleteValue (Type, Index, WalkState);
    }
 
    /*
     * Install the Obj descriptor (*NewObjDesc) into
     * the descriptor for the Arg or Local.
     * (increments the object reference count by one)
     */
    Status = AcpiDsMethodDataSetValue (Type, Index, NewObjDesc, WalkState);
 
    /* Remove local reference if we copied the object above */
 
    if (NewObjDesc != ObjDesc)
    {
        AcpiUtRemoveReference (NewObjDesc);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiExStore().