--- /dev/null
+/*******************************************************************************
+ *
+ * Module Name: dsmthdat - control method arguments and local variables
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999 - 2009, 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.
+ *
+ *****************************************************************************/
+
+#define __DSMTHDAT_C__
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acdispat.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+
+#define _COMPONENT ACPI_DISPATCHER
+ ACPI_MODULE_NAME ("dsmthdat")
+
+/* Local prototypes */
+
+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);
+
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+ACPI_OBJECT_TYPE
+AcpiDsMethodDataGetType (
+ UINT16 Opcode,
+ UINT32 Index,
+ ACPI_WALK_STATE *WalkState);
+#endif
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataInit
+ *
+ * PARAMETERS: WalkState - Current walk state object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Initialize the data structures that hold the method's arguments
+ * and locals. The data struct is an array of namespace nodes for
+ * each - this allows RefOf and DeRefOf to work properly for these
+ * special data types.
+ *
+ * NOTES: WalkState fields are initialized to zero by the
+ * ACPI_ALLOCATE_ZEROED().
+ *
+ * A pseudo-Namespace Node is assigned to each argument and local
+ * so that RefOf() can return a pointer to the Node.
+ *
+ ******************************************************************************/
+
+void
+AcpiDsMethodDataInit (
+ ACPI_WALK_STATE *WalkState)
+{
+ 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_END_OF_PEER_LIST | 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_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL;
+ }
+
+ return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataDeleteAll
+ *
+ * PARAMETERS: WalkState - Current walk state object
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Delete method locals and arguments. Arguments are only
+ * deleted if this method was called from another method.
+ *
+ ******************************************************************************/
+
+void
+AcpiDsMethodDataDeleteAll (
+ ACPI_WALK_STATE *WalkState)
+{
+ 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%d=%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%d=%p\n",
+ Index, WalkState->Arguments[Index].Object));
+
+ /* Detach object (if present) and remove a reference */
+
+ AcpiNsDetachObject (&WalkState->Arguments[Index]);
+ }
+ }
+
+ return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataInitArgs
+ *
+ * PARAMETERS: *Params - Pointer to a parameter list for the method
+ * MaxParamCount - The arg count for this method
+ * WalkState - Current walk state object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Initialize arguments for a method. The parameter list is a list
+ * of ACPI operand objects, either null terminated or whose length
+ * is defined by MaxParamCount.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiDsMethodDataInitArgs (
+ ACPI_OPERAND_OBJECT **Params,
+ UINT32 MaxParamCount,
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_STATUS Status;
+ UINT32 Index = 0;
+
+
+ ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params);
+
+
+ if (!Params)
+ {
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param 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, "%d args passed to method\n", Index));
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataGetNode
+ *
+ * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
+ * ACPI_REFCLASS_ARG
+ * Index - Which Local or Arg whose type to get
+ * WalkState - Current walk state object
+ * Node - Where the node is returned.
+ *
+ * RETURN: Status and node
+ *
+ * DESCRIPTION: Get the Node associated with a local or arg.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiDsMethodDataGetNode (
+ UINT8 Type,
+ UINT32 Index,
+ ACPI_WALK_STATE *WalkState,
+ ACPI_NAMESPACE_NODE **Node)
+{
+ 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 %d is invalid (max %d)",
+ 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 %d is invalid (max %d)",
+ 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 %d is invalid", Type));
+ return_ACPI_STATUS (AE_TYPE);
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataSetValue
+ *
+ * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
+ * ACPI_REFCLASS_ARG
+ * Index - Which Local or Arg to get
+ * Object - Object to be inserted into the stack entry
+ * WalkState - Current walk state object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.
+ * Note: There is no "implicit conversion" for locals.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiDsMethodDataSetValue (
+ UINT8 Type,
+ UINT32 Index,
+ ACPI_OPERAND_OBJECT *Object,
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_STATUS Status;
+ ACPI_NAMESPACE_NODE *Node;
+
+
+ ACPI_FUNCTION_TRACE (DsMethodDataSetValue);
+
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "NewObj %p Type %2.2X, Refs=%d [%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);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataGetValue
+ *
+ * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
+ * ACPI_REFCLASS_ARG
+ * Index - Which localVar or argument to get
+ * WalkState - Current walk state object
+ * DestDesc - Where Arg or Local value is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Retrieve value of selected Arg or Local for this method
+ * Used only in AcpiExResolveToValue().
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiDsMethodDataGetValue (
+ UINT8 Type,
+ UINT32 Index,
+ ACPI_WALK_STATE *WalkState,
+ ACPI_OPERAND_OBJECT **DestDesc)
+{
+ 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[%d] 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: %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);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataDeleteValue
+ *
+ * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
+ * ACPI_REFCLASS_ARG
+ * Index - Which localVar or argument to delete
+ * WalkState - Current walk state object
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Delete the entry at Opcode:Index. Inserts
+ * a null into the stack slot after the object is deleted.
+ *
+ ******************************************************************************/
+
+static void
+AcpiDsMethodDataDeleteValue (
+ UINT8 Type,
+ UINT32 Index,
+ ACPI_WALK_STATE *WalkState)
+{
+ 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;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsStoreObjectToLocal
+ *
+ * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
+ * ACPI_REFCLASS_ARG
+ * Index - Which Local or Arg to set
+ * ObjDesc - Value to be stored
+ * WalkState - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed
+ * as the new value for the Arg or Local and the reference count
+ * for ObjDesc is incremented.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiDsStoreObjectToLocal (
+ UINT8 Type,
+ UINT32 Index,
+ ACPI_OPERAND_OBJECT *ObjDesc,
+ ACPI_WALK_STATE *WalkState)
+{
+ 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=%d 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);
+}
+
+
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+/*******************************************************************************
+ *
+ * FUNCTION: AcpiDsMethodDataGetType
+ *
+ * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP
+ * Index - Which Local or Arg whose type to get
+ * WalkState - Current walk state object
+ *
+ * RETURN: Data type of current value of the selected Arg or Local
+ *
+ * DESCRIPTION: Get the type of the object stored in the Local or Arg
+ *
+ ******************************************************************************/
+
+ACPI_OBJECT_TYPE
+AcpiDsMethodDataGetType (
+ UINT16 Opcode,
+ UINT32 Index,
+ ACPI_WALK_STATE *WalkState)
+{
+ ACPI_STATUS Status;
+ ACPI_NAMESPACE_NODE *Node;
+ ACPI_OPERAND_OBJECT *Object;
+
+
+ ACPI_FUNCTION_TRACE (DsMethodDataGetType);
+
+
+ /* Get the namespace node for the arg/local */
+
+ Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
+ if (ACPI_FAILURE (Status))
+ {
+ return_VALUE ((ACPI_TYPE_NOT_FOUND));
+ }
+
+ /* Get the object */
+
+ Object = AcpiNsGetAttachedObject (Node);
+ if (!Object)
+ {
+ /* Uninitialized local/arg, return TYPE_ANY */
+
+ return_VALUE (ACPI_TYPE_ANY);
+ }
+
+ /* Get the object type */
+
+ return_VALUE (Object->Type);
+}
+#endif
+
+
projects / l4.git / blobdiff