/****************************************************************************** * * Module Name: exresnte - AML Interpreter object resolution * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include #include #include #include #include #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exresnte") /******************************************************************************* * * FUNCTION: AcpiExResolveNodeToValue * * PARAMETERS: ObjectPtr - Pointer to a location that contains * a pointer to a NS node, and will receive a * pointer to the resolved object. * WalkState - Current state. Valid only if executing AML * code. NULL if simply resolving an object * * RETURN: Status * * DESCRIPTION: Resolve a Namespace node to a valued object * * Note: for some of the data types, the pointer attached to the Node * can be either a pointer to an actual internal object or a pointer into the * AML stream itself. These types are currently: * * ACPI_TYPE_INTEGER * ACPI_TYPE_STRING * ACPI_TYPE_BUFFER * ACPI_TYPE_MUTEX * ACPI_TYPE_PACKAGE * ******************************************************************************/ ACPI_STATUS AcpiExResolveNodeToValue ( ACPI_NAMESPACE_NODE **ObjectPtr, ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status = AE_OK; ACPI_OPERAND_OBJECT *SourceDesc; ACPI_OPERAND_OBJECT *ObjDesc = NULL; ACPI_NAMESPACE_NODE *Node; ACPI_OBJECT_TYPE EntryType; ACPI_FUNCTION_TRACE (ExResolveNodeToValue); /* * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the * object that is attached to the Node. */ Node = *ObjectPtr; SourceDesc = AcpiNsGetAttachedObject (Node); EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n", Node, SourceDesc, AcpiUtGetTypeName (EntryType))); if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) || (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { /* There is always exactly one level of indirection */ Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object); SourceDesc = AcpiNsGetAttachedObject (Node); EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); *ObjectPtr = Node; } /* * Several object types require no further processing: * 1) Device/Thermal objects don't have a "real" subobject, return Node * 2) Method locals and arguments have a pseudo-Node * 3) 10/2007: Added method type to assist with Package construction. */ if ((EntryType == ACPI_TYPE_DEVICE) || (EntryType == ACPI_TYPE_THERMAL) || (EntryType == ACPI_TYPE_METHOD) || (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) { return_ACPI_STATUS (AE_OK); } if (!SourceDesc) { ACPI_ERROR ((AE_INFO, "No object attached to node [%4.4s] %p", Node->Name.Ascii, Node)); return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE); } /* * Action is based on the type of the Node, which indicates the type * of the attached object or pointer */ switch (EntryType) { case ACPI_TYPE_PACKAGE: if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE) { ACPI_ERROR ((AE_INFO, "Object not a Package, type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } Status = AcpiDsGetPackageArguments (SourceDesc); if (ACPI_SUCCESS (Status)) { /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); } break; case ACPI_TYPE_BUFFER: if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) { ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } Status = AcpiDsGetBufferArguments (SourceDesc); if (ACPI_SUCCESS (Status)) { /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); } break; case ACPI_TYPE_STRING: if (SourceDesc->Common.Type != ACPI_TYPE_STRING) { ACPI_ERROR ((AE_INFO, "Object not a String, type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); break; case ACPI_TYPE_INTEGER: if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) { ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); break; case ACPI_TYPE_BUFFER_FIELD: case ACPI_TYPE_LOCAL_REGION_FIELD: case ACPI_TYPE_LOCAL_BANK_FIELD: case ACPI_TYPE_LOCAL_INDEX_FIELD: ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n", Node, SourceDesc, EntryType)); Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); break; /* For these objects, just return the object attached to the Node */ case ACPI_TYPE_MUTEX: case ACPI_TYPE_POWER: case ACPI_TYPE_PROCESSOR: case ACPI_TYPE_EVENT: case ACPI_TYPE_REGION: /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); break; /* TYPE_ANY is untyped, and thus there is no object associated with it */ case ACPI_TYPE_ANY: ACPI_ERROR ((AE_INFO, "Untyped entry %p, no attached object!", Node)); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ case ACPI_TYPE_LOCAL_REFERENCE: switch (SourceDesc->Reference.Class) { case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */ case ACPI_REFCLASS_REFOF: case ACPI_REFCLASS_INDEX: /* Return an additional reference to the object */ ObjDesc = SourceDesc; AcpiUtAddReference (ObjDesc); break; default: /* No named references are allowed here */ ACPI_ERROR ((AE_INFO, "Unsupported Reference type 0x%X", SourceDesc->Reference.Class)); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } break; default: /* Default case is for unknown types */ ACPI_ERROR ((AE_INFO, "Node %p - Unknown object type 0x%X", Node, EntryType)); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* switch (EntryType) */ /* Return the object descriptor */ *ObjectPtr = (void *) ObjDesc; return_ACPI_STATUS (Status); }