773 lines
23 KiB
C
773 lines
23 KiB
C
/*******************************************************************************
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*
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* Module Name: dsmthdat - control method arguments and local variables
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __DSMTHDAT_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsmthdat")
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/* Local prototypes */
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static void
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AcpiDsMethodDataDeleteValue (
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UINT8 Type,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState);
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static ACPI_STATUS
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AcpiDsMethodDataSetValue (
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UINT8 Type,
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UINT32 Index,
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ACPI_OPERAND_OBJECT *Object,
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ACPI_WALK_STATE *WalkState);
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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ACPI_OBJECT_TYPE
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AcpiDsMethodDataGetType (
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UINT16 Opcode,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState);
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#endif
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataInit
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*
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* PARAMETERS: WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize the data structures that hold the method's arguments
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* and locals. The data struct is an array of namespace nodes for
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* each - this allows RefOf and DeRefOf to work properly for these
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* special data types.
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*
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* NOTES: WalkState fields are initialized to zero by the
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* ACPI_ALLOCATE_ZEROED().
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*
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* A pseudo-Namespace Node is assigned to each argument and local
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* so that RefOf() can return a pointer to the Node.
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*
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******************************************************************************/
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void
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AcpiDsMethodDataInit (
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 i;
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ACPI_FUNCTION_TRACE (DsMethodDataInit);
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/* Init the method arguments */
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for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
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{
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ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name, NAMEOF_ARG_NTE);
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WalkState->Arguments[i].Name.Integer |= (i << 24);
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WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED;
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WalkState->Arguments[i].Type = ACPI_TYPE_ANY;
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WalkState->Arguments[i].Flags = ANOBJ_METHOD_ARG;
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}
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/* Init the method locals */
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for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)
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{
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ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name, NAMEOF_LOCAL_NTE);
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WalkState->LocalVariables[i].Name.Integer |= (i << 24);
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WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED;
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WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY;
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WalkState->LocalVariables[i].Flags = ANOBJ_METHOD_LOCAL;
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataDeleteAll
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*
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* PARAMETERS: WalkState - Current walk state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete method locals and arguments. Arguments are only
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* deleted if this method was called from another method.
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*
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******************************************************************************/
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void
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AcpiDsMethodDataDeleteAll (
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ACPI_WALK_STATE *WalkState)
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{
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UINT32 Index;
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ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll);
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/* Detach the locals */
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for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++)
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{
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if (WalkState->LocalVariables[Index].Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%u=%p\n",
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Index, WalkState->LocalVariables[Index].Object));
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/* Detach object (if present) and remove a reference */
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AcpiNsDetachObject (&WalkState->LocalVariables[Index]);
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}
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}
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/* Detach the arguments */
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for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++)
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{
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if (WalkState->Arguments[Index].Object)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%u=%p\n",
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Index, WalkState->Arguments[Index].Object));
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/* Detach object (if present) and remove a reference */
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AcpiNsDetachObject (&WalkState->Arguments[Index]);
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}
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataInitArgs
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*
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* PARAMETERS: *Params - Pointer to a parameter list for the method
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* MaxParamCount - The arg count for this method
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* WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize arguments for a method. The parameter list is a list
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* of ACPI operand objects, either null terminated or whose length
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* is defined by MaxParamCount.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataInitArgs (
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ACPI_OPERAND_OBJECT **Params,
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UINT32 MaxParamCount,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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UINT32 Index = 0;
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ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params);
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if (!Params)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param list passed to method\n"));
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return_ACPI_STATUS (AE_OK);
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}
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/* Copy passed parameters into the new method stack frame */
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while ((Index < ACPI_METHOD_NUM_ARGS) &&
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(Index < MaxParamCount) &&
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Params[Index])
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{
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/*
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* A valid parameter.
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* Store the argument in the method/walk descriptor.
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* Do not copy the arg in order to implement call by reference
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*/
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Status = AcpiDsMethodDataSetValue (ACPI_REFCLASS_ARG, Index,
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Params[Index], WalkState);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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Index++;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%u args passed to method\n", Index));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataGetNode
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*
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* PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* Index - Which Local or Arg whose type to get
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* WalkState - Current walk state object
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* Node - Where the node is returned.
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*
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* RETURN: Status and node
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*
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* DESCRIPTION: Get the Node associated with a local or arg.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataGetNode (
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UINT8 Type,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE **Node)
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{
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ACPI_FUNCTION_TRACE (DsMethodDataGetNode);
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/*
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* Method Locals and Arguments are supported
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*/
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switch (Type)
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{
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case ACPI_REFCLASS_LOCAL:
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if (Index > ACPI_METHOD_MAX_LOCAL)
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{
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ACPI_ERROR ((AE_INFO,
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"Local index %u is invalid (max %u)",
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Index, ACPI_METHOD_MAX_LOCAL));
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return_ACPI_STATUS (AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*Node = &WalkState->LocalVariables[Index];
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break;
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case ACPI_REFCLASS_ARG:
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if (Index > ACPI_METHOD_MAX_ARG)
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{
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ACPI_ERROR ((AE_INFO,
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"Arg index %u is invalid (max %u)",
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Index, ACPI_METHOD_MAX_ARG));
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return_ACPI_STATUS (AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*Node = &WalkState->Arguments[Index];
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Type %u is invalid", Type));
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return_ACPI_STATUS (AE_TYPE);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataSetValue
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*
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* PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* Index - Which Local or Arg to get
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* Object - Object to be inserted into the stack entry
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* WalkState - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.
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* Note: There is no "implicit conversion" for locals.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiDsMethodDataSetValue (
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UINT8 Type,
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UINT32 Index,
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ACPI_OPERAND_OBJECT *Object,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_FUNCTION_TRACE (DsMethodDataSetValue);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"NewObj %p Type %2.2X, Refs=%u [%s]\n", Object,
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Type, Object->Common.ReferenceCount,
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AcpiUtGetTypeName (Object->Common.Type)));
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/* Get the namespace node for the arg/local */
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Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/*
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* Increment ref count so object can't be deleted while installed.
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* NOTE: We do not copy the object in order to preserve the call by
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* reference semantics of ACPI Control Method invocation.
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* (See ACPI Specification 2.0C)
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*/
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AcpiUtAddReference (Object);
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/* Install the object */
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Node->Object = Object;
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataGetValue
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*
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* PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* Index - Which localVar or argument to get
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* WalkState - Current walk state object
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* DestDesc - Where Arg or Local value is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve value of selected Arg or Local for this method
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* Used only in AcpiExResolveToValue().
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodDataGetValue (
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UINT8 Type,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT **DestDesc)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OPERAND_OBJECT *Object;
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ACPI_FUNCTION_TRACE (DsMethodDataGetValue);
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/* Validate the object descriptor */
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if (!DestDesc)
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{
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ACPI_ERROR ((AE_INFO, "Null object descriptor pointer"));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Get the namespace node for the arg/local */
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Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Get the object from the node */
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Object = Node->Object;
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/* Examine the returned object, it must be valid. */
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if (!Object)
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{
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/*
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* Index points to uninitialized object.
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* This means that either 1) The expected argument was
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* not passed to the method, or 2) A local variable
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* was referenced by the method (via the ASL)
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* before it was initialized. Either case is an error.
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*/
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/* If slack enabled, init the LocalX/ArgX to an Integer of value zero */
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if (AcpiGbl_EnableInterpreterSlack)
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{
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Object = AcpiUtCreateIntegerObject ((UINT64) 0);
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if (!Object)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Node->Object = Object;
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}
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/* Otherwise, return the error */
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else switch (Type)
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{
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case ACPI_REFCLASS_ARG:
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ACPI_ERROR ((AE_INFO,
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"Uninitialized Arg[%u] at node %p",
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Index, Node));
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return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);
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case ACPI_REFCLASS_LOCAL:
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/*
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* No error message for this case, will be trapped again later to
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* detect and ignore cases of Store(LocalX,LocalX)
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*/
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return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);
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default:
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ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X", Type));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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}
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/*
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* The Index points to an initialized and valid object.
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* Return an additional reference to the object
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*/
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*DestDesc = Object;
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AcpiUtAddReference (Object);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodDataDeleteValue
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*
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* PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* Index - Which localVar or argument to delete
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* WalkState - Current walk state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete the entry at Opcode:Index. Inserts
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* a null into the stack slot after the object is deleted.
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*
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******************************************************************************/
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static void
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AcpiDsMethodDataDeleteValue (
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UINT8 Type,
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UINT32 Index,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OPERAND_OBJECT *Object;
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ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue);
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/* Get the namespace node for the arg/local */
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Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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/* Get the associated object */
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Object = AcpiNsGetAttachedObject (Node);
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/*
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* Undefine the Arg or Local by setting its descriptor
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* pointer to NULL. Locals/Args can contain both
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* ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
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*/
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Node->Object = NULL;
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if ((Object) &&
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(ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND))
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{
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/*
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* There is a valid object.
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* Decrement the reference count by one to balance the
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* increment when the object was stored.
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*/
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AcpiUtRemoveReference (Object);
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsStoreObjectToLocal
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*
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* PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* Index - Which Local or Arg to set
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* ObjDesc - Value to be stored
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* WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed
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* as the new value for the Arg or Local and the reference count
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* for ObjDesc is incremented.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsStoreObjectToLocal (
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UINT8 Type,
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UINT32 Index,
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_WALK_STATE *WalkState)
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{
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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);
|
|
}
|
|
|
|
|
|
#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
|
|
|
|
|