293 lines
9.1 KiB
C
293 lines
9.1 KiB
C
/******************************************************************************
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*
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* Module Name: exresnte - AML Interpreter object resolution
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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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#include "acpi.h"
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#include "accommon.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exresnte")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveNodeToValue
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*
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* PARAMETERS: ObjectPtr - Pointer to a location that contains
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* a pointer to a NS node, and will receive a
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* pointer to the resolved object.
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* WalkState - Current state. Valid only if executing AML
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* code. NULL if simply resolving an object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Resolve a Namespace node to a valued object
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*
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* Note: for some of the data types, the pointer attached to the Node
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* can be either a pointer to an actual internal object or a pointer into the
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* AML stream itself. These types are currently:
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*
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* ACPI_TYPE_INTEGER
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* ACPI_TYPE_STRING
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* ACPI_TYPE_BUFFER
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* ACPI_TYPE_MUTEX
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* ACPI_TYPE_PACKAGE
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveNodeToValue (
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ACPI_NAMESPACE_NODE **ObjectPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *SourceDesc;
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ACPI_OPERAND_OBJECT *ObjDesc = NULL;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OBJECT_TYPE EntryType;
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ACPI_FUNCTION_TRACE (ExResolveNodeToValue);
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/*
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* The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
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* object that is attached to the Node.
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*/
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Node = *ObjectPtr;
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SourceDesc = AcpiNsGetAttachedObject (Node);
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EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
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Node, SourceDesc, AcpiUtGetTypeName (EntryType)));
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if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) ||
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(EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))
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{
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/* There is always exactly one level of indirection */
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Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
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SourceDesc = AcpiNsGetAttachedObject (Node);
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EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
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*ObjectPtr = Node;
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}
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/*
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* Several object types require no further processing:
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* 1) Device/Thermal objects don't have a "real" subobject, return the Node
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* 2) Method locals and arguments have a pseudo-Node
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* 3) 10/2007: Added method type to assist with Package construction.
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*/
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if ((EntryType == ACPI_TYPE_DEVICE) ||
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(EntryType == ACPI_TYPE_THERMAL) ||
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(EntryType == ACPI_TYPE_METHOD) ||
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(Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
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{
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return_ACPI_STATUS (AE_OK);
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}
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if (!SourceDesc)
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{
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ACPI_ERROR ((AE_INFO, "No object attached to node [%4.4s] %p",
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Node->Name.Ascii, Node));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* Action is based on the type of the Node, which indicates the type
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* of the attached object or pointer
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*/
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switch (EntryType)
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{
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case ACPI_TYPE_PACKAGE:
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if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
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{
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ACPI_ERROR ((AE_INFO, "Object not a Package, type %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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Status = AcpiDsGetPackageArguments (SourceDesc);
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if (ACPI_SUCCESS (Status))
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{
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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}
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break;
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case ACPI_TYPE_BUFFER:
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if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)
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{
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ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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Status = AcpiDsGetBufferArguments (SourceDesc);
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if (ACPI_SUCCESS (Status))
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{
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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}
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break;
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case ACPI_TYPE_STRING:
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if (SourceDesc->Common.Type != ACPI_TYPE_STRING)
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{
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ACPI_ERROR ((AE_INFO, "Object not a String, type %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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case ACPI_TYPE_INTEGER:
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if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER)
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{
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ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s",
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AcpiUtGetObjectTypeName (SourceDesc)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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case ACPI_TYPE_LOCAL_REGION_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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case ACPI_TYPE_LOCAL_INDEX_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"FieldRead Node=%p SourceDesc=%p Type=%X\n",
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Node, SourceDesc, EntryType));
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Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc);
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break;
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/* For these objects, just return the object attached to the Node */
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case ACPI_TYPE_MUTEX:
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case ACPI_TYPE_POWER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_EVENT:
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case ACPI_TYPE_REGION:
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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/* TYPE_ANY is untyped, and thus there is no object associated with it */
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case ACPI_TYPE_ANY:
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ACPI_ERROR ((AE_INFO,
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"Untyped entry %p, no attached object!", Node));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (SourceDesc->Reference.Class)
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{
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case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_INDEX:
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/* Return an additional reference to the object */
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ObjDesc = SourceDesc;
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AcpiUtAddReference (ObjDesc);
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break;
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default:
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/* No named references are allowed here */
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ACPI_ERROR ((AE_INFO,
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"Unsupported Reference type 0x%X",
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SourceDesc->Reference.Class));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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break;
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default:
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/* Default case is for unknown types */
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ACPI_ERROR ((AE_INFO,
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"Node %p - Unknown object type 0x%X",
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Node, EntryType));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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} /* switch (EntryType) */
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/* Return the object descriptor */
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*ObjectPtr = (void *) ObjDesc;
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return_ACPI_STATUS (Status);
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}
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