dsmthdat.c revision 26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0
/*******************************************************************************
*
* Module Name: dsmthdat - control method arguments and local variables
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#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
static ACPI_STATUS
#ifdef ACPI_OBSOLETE_FUNCTIONS
#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
{
UINT32 i;
/* Init the method arguments */
for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
{
}
/* Init the method locals */
for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)
{
}
}
/*******************************************************************************
*
* 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
{
/* Detach the locals */
{
{
/* Detach object (if present) and remove a reference */
}
}
/* Detach the arguments */
{
{
/* Detach object (if present) and remove a reference */
}
}
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
{
if (!Params)
{
}
/* Copy passed parameters into the new method stack frame */
while ((Index < ACPI_METHOD_NUM_ARGS) &&
(Index < MaxParamCount) &&
{
/*
* A valid parameter.
* Do not copy the arg in order to implement call by reference
*/
if (ACPI_FAILURE (Status))
{
}
Index++;
}
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
{
/*
* Method Locals and Arguments are supported
*/
switch (Type)
{
case ACPI_REFCLASS_LOCAL:
if (Index > ACPI_METHOD_MAX_LOCAL)
{
"Local index %u is invalid (max %u)",
}
/* Return a pointer to the pseudo-node */
break;
case ACPI_REFCLASS_ARG:
if (Index > ACPI_METHOD_MAX_ARG)
{
"Arg index %u is invalid (max %u)",
}
/* Return a pointer to the pseudo-node */
break;
default:
}
}
/*******************************************************************************
*
* 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
{
"NewObj %p Type %2.2X, Refs=%u [%s]\n", Object,
if (ACPI_FAILURE (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)
*/
/* Install the object */
}
/*******************************************************************************
*
* 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().
*
******************************************************************************/
{
/* Validate the object descriptor */
if (!DestDesc)
{
}
if (ACPI_FAILURE (Status))
{
}
/* Get the object from the node */
/* 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 (!Object)
{
}
}
/* Otherwise, return the error */
else switch (Type)
{
case ACPI_REFCLASS_ARG:
"Uninitialized Arg[%u] at node %p",
case ACPI_REFCLASS_LOCAL:
/*
* No error message for this case, will be trapped again later to
* detect and ignore cases of Store(LocalX,LocalX)
*/
default:
}
}
/*
* The Index points to an initialized and valid object.
* Return an additional reference to the object
*/
}
/*******************************************************************************
*
* 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
{
if (ACPI_FAILURE (Status))
{
}
/* Get the associated object */
/*
* Undefine the Arg or Local by setting its descriptor
* ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
*/
if ((Object) &&
{
/*
* There is a valid object.
* Decrement the reference count by one to balance the
* increment when the object was stored.
*/
}
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
{
/* Parameter validation */
if (!ObjDesc)
{
}
if (ACPI_FAILURE (Status))
{
}
if (CurrentObjDesc == ObjDesc)
{
ObjDesc));
}
/*
* 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.
*/
{
if (ACPI_FAILURE (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
*/
{
"Arg (%p) is an ObjRef(Node), storing in node %p\n",
/*
* Store this object to the Node (perform the indirect store)
* NOTE: No implicit conversion is performed, as per the ACPI
*/
/* Remove local reference if we copied the object above */
if (NewObjDesc != ObjDesc)
{
}
}
}
/* Delete the existing object before storing the new one */
}
/*
* Install the Obj descriptor (*NewObjDesc) into
* the descriptor for the Arg or Local.
* (increments the object reference count by one)
*/
/* Remove local reference if we copied the object above */
if (NewObjDesc != ObjDesc)
{
}
}
#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
*
******************************************************************************/
{
if (ACPI_FAILURE (Status))
{
}
/* Get the object */
if (!Object)
{
}
/* Get the object type */
}
#endif