| /****************************************************************************** |
| * |
| * Module Name: exresnte - AML Interpreter object resolution |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2020, 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. |
| * |
| * 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. |
| */ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #include "acdispat.h" |
| #include "acinterp.h" |
| #include "acnamesp.h" |
| |
| |
| #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); |
| } |