forked from KolibriOS/kolibrios
653 lines
21 KiB
C
653 lines
21 KiB
C
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/******************************************************************************
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*
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* Module Name: exresolv - AML Interpreter object resolution
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __EXRESOLV_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "amlcode.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 ("exresolv")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiExResolveObjectToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExResolveToValue
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*
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* PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
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* be either an (ACPI_OPERAND_OBJECT *)
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* or an ACPI_HANDLE.
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* WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert Reference objects to values
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_PTR (ExResolveToValue, StackPtr);
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if (!StackPtr || !*StackPtr)
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{
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ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* The entity pointed to by the StackPtr can be either
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* 1) A valid ACPI_OPERAND_OBJECT, or
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* 2) A ACPI_NAMESPACE_NODE (NamedObj)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
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{
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Status = AcpiExResolveObjectToValue (StackPtr, 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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if (!*StackPtr)
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{
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ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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}
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/*
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* Object on the stack may have changed if AcpiExResolveObjectToValue()
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* was called (i.e., we can't use an _else_ here.)
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
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{
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Status = AcpiExResolveNodeToValue (
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ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
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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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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
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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: AcpiExResolveObjectToValue
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*
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* PARAMETERS: StackPtr - Pointer to an internal object
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* WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve the value from an internal object. The Reference type
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* uses the associated AML opcode to determine the value.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiExResolveObjectToValue (
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ACPI_OPERAND_OBJECT **StackPtr,
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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 *StackDesc;
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ACPI_OPERAND_OBJECT *ObjDesc = NULL;
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UINT8 RefType;
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ACPI_FUNCTION_TRACE (ExResolveObjectToValue);
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StackDesc = *StackPtr;
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/* This is an ACPI_OPERAND_OBJECT */
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switch (StackDesc->Common.Type)
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{
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case ACPI_TYPE_LOCAL_REFERENCE:
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RefType = StackDesc->Reference.Class;
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switch (RefType)
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{
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case ACPI_REFCLASS_LOCAL:
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case ACPI_REFCLASS_ARG:
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/*
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* Get the local from the method's state info
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* Note: this increments the local's object reference count
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*/
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Status = AcpiDsMethodDataGetValue (RefType,
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StackDesc->Reference.Value, WalkState, &ObjDesc);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n",
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StackDesc->Reference.Value, ObjDesc));
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/*
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* Now we can delete the original Reference Object and
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* replace it with the resolved value
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*/
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AcpiUtRemoveReference (StackDesc);
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*StackPtr = ObjDesc;
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break;
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case ACPI_REFCLASS_INDEX:
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switch (StackDesc->Reference.TargetType)
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{
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case ACPI_TYPE_BUFFER_FIELD:
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/* Just return - do not dereference */
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break;
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case ACPI_TYPE_PACKAGE:
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/* If method call or CopyObject - do not dereference */
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if ((WalkState->Opcode == AML_INT_METHODCALL_OP) ||
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(WalkState->Opcode == AML_COPY_OP))
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{
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break;
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}
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/* Otherwise, dereference the PackageIndex to a package element */
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ObjDesc = *StackDesc->Reference.Where;
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if (ObjDesc)
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{
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/*
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* Valid object descriptor, copy pointer to return value
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* (i.e., dereference the package index)
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* Delete the ref object, increment the returned object
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*/
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AcpiUtRemoveReference (StackDesc);
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AcpiUtAddReference (ObjDesc);
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*StackPtr = ObjDesc;
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}
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else
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{
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/*
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* A NULL object descriptor means an uninitialized element of
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* the package, can't dereference it
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*/
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ACPI_ERROR ((AE_INFO,
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"Attempt to dereference an Index to NULL package element Idx=%p",
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StackDesc));
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Status = AE_AML_UNINITIALIZED_ELEMENT;
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}
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break;
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default:
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/* Invalid reference object */
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ACPI_ERROR ((AE_INFO,
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"Unknown TargetType 0x%X in Index/Reference object %p",
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StackDesc->Reference.TargetType, StackDesc));
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Status = AE_AML_INTERNAL;
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break;
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}
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break;
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_DEBUG:
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case ACPI_REFCLASS_TABLE:
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/* Just leave the object as-is, do not dereference */
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break;
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case ACPI_REFCLASS_NAME: /* Reference to a named object */
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/* Dereference the name */
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if ((StackDesc->Reference.Node->Type == ACPI_TYPE_DEVICE) ||
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(StackDesc->Reference.Node->Type == ACPI_TYPE_THERMAL))
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{
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/* These node types do not have 'real' subobjects */
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*StackPtr = (void *) StackDesc->Reference.Node;
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}
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else
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{
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/* Get the object pointed to by the namespace node */
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*StackPtr = (StackDesc->Reference.Node)->Object;
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AcpiUtAddReference (*StackPtr);
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}
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AcpiUtRemoveReference (StackDesc);
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break;
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default:
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ACPI_ERROR ((AE_INFO,
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"Unknown Reference type 0x%X in %p", RefType, StackDesc));
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Status = AE_AML_INTERNAL;
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break;
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}
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break;
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case ACPI_TYPE_BUFFER:
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Status = AcpiDsGetBufferArguments (StackDesc);
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break;
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case ACPI_TYPE_PACKAGE:
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Status = AcpiDsGetPackageArguments (StackDesc);
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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, "FieldRead SourceDesc=%p Type=%X\n",
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StackDesc, StackDesc->Common.Type));
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Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
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/* Remove a reference to the original operand, then override */
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AcpiUtRemoveReference (*StackPtr);
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*StackPtr = (void *) ObjDesc;
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break;
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default:
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break;
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}
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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: AcpiExResolveMultiple
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*
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* PARAMETERS: WalkState - Current state (contains AML opcode)
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* Operand - Starting point for resolution
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* ReturnType - Where the object type is returned
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* ReturnDesc - Where the resolved object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the base object and type. Traverse a reference list if
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* necessary to get to the base object.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExResolveMultiple (
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT *Operand,
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ACPI_OBJECT_TYPE *ReturnType,
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ACPI_OPERAND_OBJECT **ReturnDesc)
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{
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ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_OBJECT_TYPE Type;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiExResolveMultiple);
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/* Operand can be either a namespace node or an operand descriptor */
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switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
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{
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case ACPI_DESC_TYPE_OPERAND:
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Type = ObjDesc->Common.Type;
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break;
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case ACPI_DESC_TYPE_NAMED:
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Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
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ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
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/* If we had an Alias node, use the attached object for type info */
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if (Type == ACPI_TYPE_LOCAL_ALIAS)
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{
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Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
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ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
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}
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break;
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default:
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* If type is anything other than a reference, we are done */
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if (Type != ACPI_TYPE_LOCAL_REFERENCE)
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{
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goto Exit;
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}
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/*
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* For reference objects created via the RefOf, Index, or Load/LoadTable
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* operators, we need to get to the base object (as per the ACPI
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* specification of the ObjectType and SizeOf operators). This means
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* traversing the list of possibly many nested references.
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*/
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while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
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{
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switch (ObjDesc->Reference.Class)
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{
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_NAME:
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/* Dereference the reference pointer */
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if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF)
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{
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Node = ObjDesc->Reference.Object;
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}
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else /* AML_INT_NAMEPATH_OP */
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{
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Node = ObjDesc->Reference.Node;
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}
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/* All "References" point to a NS node */
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if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
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{
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ACPI_ERROR ((AE_INFO,
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"Not a namespace node %p [%s]",
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Node, AcpiUtGetDescriptorName (Node)));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/* Get the attached object */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (!ObjDesc)
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{
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/* No object, use the NS node type */
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Type = AcpiNsGetType (Node);
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goto Exit;
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}
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/* Check for circular references */
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if (ObjDesc == Operand)
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{
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return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
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}
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break;
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case ACPI_REFCLASS_INDEX:
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/* Get the type of this reference (index into another object) */
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Type = ObjDesc->Reference.TargetType;
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if (Type != ACPI_TYPE_PACKAGE)
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{
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goto Exit;
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}
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/*
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* The main object is a package, we want to get the type
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* of the individual package element that is referenced by
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* the index.
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*
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* This could of course in turn be another reference object.
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*/
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ObjDesc = *(ObjDesc->Reference.Where);
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if (!ObjDesc)
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{
|
|
/* NULL package elements are allowed */
|
|
|
|
Type = 0; /* Uninitialized */
|
|
goto Exit;
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_REFCLASS_TABLE:
|
|
|
|
Type = ACPI_TYPE_DDB_HANDLE;
|
|
goto Exit;
|
|
|
|
|
|
case ACPI_REFCLASS_LOCAL:
|
|
case ACPI_REFCLASS_ARG:
|
|
|
|
if (ReturnDesc)
|
|
{
|
|
Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class,
|
|
ObjDesc->Reference.Value, WalkState, &ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
}
|
|
else
|
|
{
|
|
Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class,
|
|
ObjDesc->Reference.Value, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
Type = ACPI_TYPE_ANY;
|
|
goto Exit;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_REFCLASS_DEBUG:
|
|
|
|
/* The Debug Object is of type "DebugObject" */
|
|
|
|
Type = ACPI_TYPE_DEBUG_OBJECT;
|
|
goto Exit;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unknown Reference Class 0x%2.2X", ObjDesc->Reference.Class));
|
|
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 = ObjDesc->Common.Type;
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
|