/****************************************************************************** * * Module Name: exresolv - AML Interpreter object resolution * $Revision: 119 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2003, 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. * *****************************************************************************/ /* $DragonFly: src/sys/contrib/dev/acpica/Attic/exresolv.c,v 1.1 2003/09/24 03:32:16 drhodus Exp $ */ #define __EXRESOLV_C__ #include "acpi.h" #include "amlcode.h" #include "acdispat.h" #include "acinterp.h" #include "acnamesp.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exresolv") /******************************************************************************* * * FUNCTION: AcpiExResolveToValue * * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can * be either an (ACPI_OPERAND_OBJECT *) * or an ACPI_HANDLE. * WalkState - Current method state * * RETURN: Status * * DESCRIPTION: Convert Reference objects to values * ******************************************************************************/ ACPI_STATUS AcpiExResolveToValue ( ACPI_OPERAND_OBJECT **StackPtr, ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); if (!StackPtr || !*StackPtr) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); return_ACPI_STATUS (AE_AML_NO_OPERAND); } /* * The entity pointed to by the StackPtr can be either * 1) A valid ACPI_OPERAND_OBJECT, or * 2) A ACPI_NAMESPACE_NODE (NamedObj) */ if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) { Status = AcpiExResolveObjectToValue (StackPtr, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } /* * Object on the stack may have changed if AcpiExResolveObjectToValue() * was called (i.e., we can't use an _else_ here.) */ if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) { Status = AcpiExResolveNodeToValue ( ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr)); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiExResolveObjectToValue * * PARAMETERS: StackPtr - Pointer to a stack location that contains a * ptr to an internal object. * WalkState - Current method state * * RETURN: Status * * DESCRIPTION: Retrieve the value from an internal object. The Reference type * uses the associated AML opcode to determine the value. * ******************************************************************************/ ACPI_STATUS AcpiExResolveObjectToValue ( ACPI_OPERAND_OBJECT **StackPtr, ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status = AE_OK; ACPI_OPERAND_OBJECT *StackDesc; void *TempNode; ACPI_OPERAND_OBJECT *ObjDesc; UINT16 Opcode; ACPI_FUNCTION_TRACE ("ExResolveObjectToValue"); StackDesc = *StackPtr; /* This is an ACPI_OPERAND_OBJECT */ switch (ACPI_GET_OBJECT_TYPE (StackDesc)) { case ACPI_TYPE_LOCAL_REFERENCE: Opcode = StackDesc->Reference.Opcode; switch (Opcode) { case AML_NAME_OP: /* * Convert indirect name ptr to a direct name ptr. * Then, AcpiExResolveNodeToValue can be used to get the value */ TempNode = StackDesc->Reference.Object; /* Delete the Reference Object */ AcpiUtRemoveReference (StackDesc); /* Put direct name pointer onto stack and exit */ (*StackPtr) = TempNode; break; case AML_LOCAL_OP: case AML_ARG_OP: /* * Get the local from the method's state info * Note: this increments the local's object reference count */ Status = AcpiDsMethodDataGetValue (Opcode, StackDesc->Reference.Offset, WalkState, &ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * Now we can delete the original Reference Object and * replace it with the resolve value */ AcpiUtRemoveReference (StackDesc); *StackPtr = ObjDesc; ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %d] ValueObj is %p\n", StackDesc->Reference.Offset, ObjDesc)); break; case AML_INDEX_OP: switch (StackDesc->Reference.TargetType) { case ACPI_TYPE_BUFFER_FIELD: /* Just return - leave the Reference on the stack */ break; case ACPI_TYPE_PACKAGE: ObjDesc = *StackDesc->Reference.Where; if (ObjDesc) { /* * Valid obj descriptor, copy pointer to return value * (i.e., dereference the package index) * Delete the ref object, increment the returned object */ AcpiUtRemoveReference (StackDesc); AcpiUtAddReference (ObjDesc); *StackPtr = ObjDesc; } else { /* * A NULL object descriptor means an unitialized element of * the package, can't dereference it */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Attempt to deref an Index to NULL pkg element Idx=%p\n", StackDesc)); Status = AE_AML_UNINITIALIZED_ELEMENT; } break; default: /* Invalid reference object */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown TargetType %X in Index/Reference obj %p\n", StackDesc->Reference.TargetType, StackDesc)); Status = AE_AML_INTERNAL; break; } break; case AML_REF_OF_OP: case AML_DEBUG_OP: /* Just leave the object as-is */ break; default: ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference opcode %X in %p\n", Opcode, StackDesc)); Status = AE_AML_INTERNAL; break; } break; case ACPI_TYPE_BUFFER: Status = AcpiDsGetBufferArguments (StackDesc); break; case ACPI_TYPE_PACKAGE: Status = AcpiDsGetPackageArguments (StackDesc); break; /* * These cases may never happen here, but just in case.. */ 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 SourceDesc=%p Type=%X\n", StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc))); Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); *StackPtr = (void *) ObjDesc; break; default: break; } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExResolveMultiple * * PARAMETERS: WalkState - Current state (contains AML opcode) * Operand - Starting point for resolution * ReturnType - Where the object type is returned * ReturnDesc - Where the resolved object is returned * * RETURN: Status * * DESCRIPTION: Return the base object and type. Traverse a reference list if * necessary to get to the base object. * ******************************************************************************/ ACPI_STATUS AcpiExResolveMultiple ( ACPI_WALK_STATE *WalkState, ACPI_OPERAND_OBJECT *Operand, ACPI_OBJECT_TYPE *ReturnType, ACPI_OPERAND_OBJECT **ReturnDesc) { ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand; ACPI_NAMESPACE_NODE *Node; ACPI_OBJECT_TYPE Type; ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple"); /* * For reference objects created via the RefOf or Index operators, * we need to get to the base object (as per the ACPI specification * of the ObjectType and SizeOf operators). This means traversing * the list of possibly many nested references. */ while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE) { switch (ObjDesc->Reference.Opcode) { case AML_REF_OF_OP: /* Dereference the reference pointer */ Node = ObjDesc->Reference.Object; /* All "References" point to a NS node */ if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) { return_ACPI_STATUS (AE_AML_INTERNAL); } /* Get the attached object */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { /* No object, use the NS node type */ Type = AcpiNsGetType (Node); goto Exit; } /* Check for circular references */ if (ObjDesc == Operand) { return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); } break; case AML_INDEX_OP: /* Get the type of this reference (index into another object) */ Type = ObjDesc->Reference.TargetType; if (Type != ACPI_TYPE_PACKAGE) { goto Exit; } /* * The main object is a package, we want to get the type * of the individual package element that is referenced by * the index. * * This could of course in turn be another reference object. */ ObjDesc = *(ObjDesc->Reference.Where); break; case AML_INT_NAMEPATH_OP: /* Dereference the reference pointer */ Node = ObjDesc->Reference.Node; /* All "References" point to a NS node */ if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) { return_ACPI_STATUS (AE_AML_INTERNAL); } /* Get the attached object */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { /* No object, use the NS node type */ Type = AcpiNsGetType (Node); goto Exit; } /* Check for circular references */ if (ObjDesc == Operand) { return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); } break; case AML_DEBUG_OP: /* The Debug Object is of type "DebugObject" */ Type = ACPI_TYPE_DEBUG_OBJECT; goto Exit; default: ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n", ObjDesc->Reference.Opcode)); return_ACPI_STATUS (AE_AML_INTERNAL); } } /* * Now we are guaranteed to have an object that has not been created * via the RefOf or Index operators. */ Type = ACPI_GET_OBJECT_TYPE (ObjDesc); Exit: /* Convert internal types to external types */ switch (Type) { case ACPI_TYPE_LOCAL_REGION_FIELD: case ACPI_TYPE_LOCAL_BANK_FIELD: case ACPI_TYPE_LOCAL_INDEX_FIELD: Type = ACPI_TYPE_FIELD_UNIT; break; case ACPI_TYPE_LOCAL_SCOPE: /* Per ACPI Specification, Scope is untyped */ Type = ACPI_TYPE_ANY; break; default: /* No change to Type required */ break; } *ReturnType = Type; if (ReturnDesc) { *ReturnDesc = ObjDesc; } return_ACPI_STATUS (AE_OK); }