10d02842fSSascha Wildner /******************************************************************************
20d02842fSSascha Wildner *
30d02842fSSascha Wildner * Module Name: exresolv - AML Interpreter object resolution
40d02842fSSascha Wildner *
50d02842fSSascha Wildner *****************************************************************************/
60d02842fSSascha Wildner
7b4315fc7SSascha Wildner /******************************************************************************
8b4315fc7SSascha Wildner *
9b4315fc7SSascha Wildner * 1. Copyright Notice
10b4315fc7SSascha Wildner *
11*383048acSSascha Wildner * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp.
120d02842fSSascha Wildner * All rights reserved.
130d02842fSSascha Wildner *
14b4315fc7SSascha Wildner * 2. License
15b4315fc7SSascha Wildner *
16b4315fc7SSascha Wildner * 2.1. This is your license from Intel Corp. under its intellectual property
17b4315fc7SSascha Wildner * rights. You may have additional license terms from the party that provided
18b4315fc7SSascha Wildner * you this software, covering your right to use that party's intellectual
19b4315fc7SSascha Wildner * property rights.
20b4315fc7SSascha Wildner *
21b4315fc7SSascha Wildner * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22b4315fc7SSascha Wildner * copy of the source code appearing in this file ("Covered Code") an
23b4315fc7SSascha Wildner * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24b4315fc7SSascha Wildner * base code distributed originally by Intel ("Original Intel Code") to copy,
25b4315fc7SSascha Wildner * make derivatives, distribute, use and display any portion of the Covered
26b4315fc7SSascha Wildner * Code in any form, with the right to sublicense such rights; and
27b4315fc7SSascha Wildner *
28b4315fc7SSascha Wildner * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29b4315fc7SSascha Wildner * license (with the right to sublicense), under only those claims of Intel
30b4315fc7SSascha Wildner * patents that are infringed by the Original Intel Code, to make, use, sell,
31b4315fc7SSascha Wildner * offer to sell, and import the Covered Code and derivative works thereof
32b4315fc7SSascha Wildner * solely to the minimum extent necessary to exercise the above copyright
33b4315fc7SSascha Wildner * license, and in no event shall the patent license extend to any additions
34b4315fc7SSascha Wildner * to or modifications of the Original Intel Code. No other license or right
35b4315fc7SSascha Wildner * is granted directly or by implication, estoppel or otherwise;
36b4315fc7SSascha Wildner *
37b4315fc7SSascha Wildner * The above copyright and patent license is granted only if the following
38b4315fc7SSascha Wildner * conditions are met:
39b4315fc7SSascha Wildner *
40b4315fc7SSascha Wildner * 3. Conditions
41b4315fc7SSascha Wildner *
42b4315fc7SSascha Wildner * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43b4315fc7SSascha Wildner * Redistribution of source code of any substantial portion of the Covered
44b4315fc7SSascha Wildner * Code or modification with rights to further distribute source must include
45b4315fc7SSascha Wildner * the above Copyright Notice, the above License, this list of Conditions,
46b4315fc7SSascha Wildner * and the following Disclaimer and Export Compliance provision. In addition,
47b4315fc7SSascha Wildner * Licensee must cause all Covered Code to which Licensee contributes to
48b4315fc7SSascha Wildner * contain a file documenting the changes Licensee made to create that Covered
49b4315fc7SSascha Wildner * Code and the date of any change. Licensee must include in that file the
50b4315fc7SSascha Wildner * documentation of any changes made by any predecessor Licensee. Licensee
51b4315fc7SSascha Wildner * must include a prominent statement that the modification is derived,
52b4315fc7SSascha Wildner * directly or indirectly, from Original Intel Code.
53b4315fc7SSascha Wildner *
54b4315fc7SSascha Wildner * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55b4315fc7SSascha Wildner * Redistribution of source code of any substantial portion of the Covered
56b4315fc7SSascha Wildner * Code or modification without rights to further distribute source must
57b4315fc7SSascha Wildner * include the following Disclaimer and Export Compliance provision in the
58b4315fc7SSascha Wildner * documentation and/or other materials provided with distribution. In
59b4315fc7SSascha Wildner * addition, Licensee may not authorize further sublicense of source of any
60b4315fc7SSascha Wildner * portion of the Covered Code, and must include terms to the effect that the
61b4315fc7SSascha Wildner * license from Licensee to its licensee is limited to the intellectual
62b4315fc7SSascha Wildner * property embodied in the software Licensee provides to its licensee, and
63b4315fc7SSascha Wildner * not to intellectual property embodied in modifications its licensee may
64b4315fc7SSascha Wildner * make.
65b4315fc7SSascha Wildner *
66b4315fc7SSascha Wildner * 3.3. Redistribution of Executable. Redistribution in executable form of any
67b4315fc7SSascha Wildner * substantial portion of the Covered Code or modification must reproduce the
68b4315fc7SSascha Wildner * above Copyright Notice, and the following Disclaimer and Export Compliance
69b4315fc7SSascha Wildner * provision in the documentation and/or other materials provided with the
70b4315fc7SSascha Wildner * distribution.
71b4315fc7SSascha Wildner *
72b4315fc7SSascha Wildner * 3.4. Intel retains all right, title, and interest in and to the Original
73b4315fc7SSascha Wildner * Intel Code.
74b4315fc7SSascha Wildner *
75b4315fc7SSascha Wildner * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76b4315fc7SSascha Wildner * Intel shall be used in advertising or otherwise to promote the sale, use or
77b4315fc7SSascha Wildner * other dealings in products derived from or relating to the Covered Code
78b4315fc7SSascha Wildner * without prior written authorization from Intel.
79b4315fc7SSascha Wildner *
80b4315fc7SSascha Wildner * 4. Disclaimer and Export Compliance
81b4315fc7SSascha Wildner *
82b4315fc7SSascha Wildner * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83b4315fc7SSascha Wildner * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84b4315fc7SSascha Wildner * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85b4315fc7SSascha Wildner * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86b4315fc7SSascha Wildner * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87b4315fc7SSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88b4315fc7SSascha Wildner * PARTICULAR PURPOSE.
89b4315fc7SSascha Wildner *
90b4315fc7SSascha Wildner * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91b4315fc7SSascha Wildner * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92b4315fc7SSascha Wildner * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93b4315fc7SSascha Wildner * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94b4315fc7SSascha Wildner * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95b4315fc7SSascha Wildner * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96b4315fc7SSascha Wildner * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97b4315fc7SSascha Wildner * LIMITED REMEDY.
98b4315fc7SSascha Wildner *
99b4315fc7SSascha Wildner * 4.3. Licensee shall not export, either directly or indirectly, any of this
100b4315fc7SSascha Wildner * software or system incorporating such software without first obtaining any
101b4315fc7SSascha Wildner * required license or other approval from the U. S. Department of Commerce or
102b4315fc7SSascha Wildner * any other agency or department of the United States Government. In the
103b4315fc7SSascha Wildner * event Licensee exports any such software from the United States or
104b4315fc7SSascha Wildner * re-exports any such software from a foreign destination, Licensee shall
105b4315fc7SSascha Wildner * ensure that the distribution and export/re-export of the software is in
106b4315fc7SSascha Wildner * compliance with all laws, regulations, orders, or other restrictions of the
107b4315fc7SSascha Wildner * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108b4315fc7SSascha Wildner * any of its subsidiaries will export/re-export any technical data, process,
109b4315fc7SSascha Wildner * software, or service, directly or indirectly, to any country for which the
110b4315fc7SSascha Wildner * United States government or any agency thereof requires an export license,
111b4315fc7SSascha Wildner * other governmental approval, or letter of assurance, without first obtaining
112b4315fc7SSascha Wildner * such license, approval or letter.
113b4315fc7SSascha Wildner *
114b4315fc7SSascha Wildner *****************************************************************************
115b4315fc7SSascha Wildner *
116b4315fc7SSascha Wildner * Alternatively, you may choose to be licensed under the terms of the
117b4315fc7SSascha Wildner * following license:
118b4315fc7SSascha Wildner *
1190d02842fSSascha Wildner * Redistribution and use in source and binary forms, with or without
1200d02842fSSascha Wildner * modification, are permitted provided that the following conditions
1210d02842fSSascha Wildner * are met:
1220d02842fSSascha Wildner * 1. Redistributions of source code must retain the above copyright
1230d02842fSSascha Wildner * notice, this list of conditions, and the following disclaimer,
1240d02842fSSascha Wildner * without modification.
1250d02842fSSascha Wildner * 2. Redistributions in binary form must reproduce at minimum a disclaimer
1260d02842fSSascha Wildner * substantially similar to the "NO WARRANTY" disclaimer below
1270d02842fSSascha Wildner * ("Disclaimer") and any redistribution must be conditioned upon
1280d02842fSSascha Wildner * including a substantially similar Disclaimer requirement for further
1290d02842fSSascha Wildner * binary redistribution.
1300d02842fSSascha Wildner * 3. Neither the names of the above-listed copyright holders nor the names
1310d02842fSSascha Wildner * of any contributors may be used to endorse or promote products derived
1320d02842fSSascha Wildner * from this software without specific prior written permission.
1330d02842fSSascha Wildner *
134b4315fc7SSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135b4315fc7SSascha Wildner * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136b4315fc7SSascha Wildner * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137b4315fc7SSascha Wildner * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138b4315fc7SSascha Wildner * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139b4315fc7SSascha Wildner * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140b4315fc7SSascha Wildner * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141b4315fc7SSascha Wildner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142b4315fc7SSascha Wildner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143b4315fc7SSascha Wildner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144b4315fc7SSascha Wildner * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145b4315fc7SSascha Wildner *
146b4315fc7SSascha Wildner * Alternatively, you may choose to be licensed under the terms of the
1470d02842fSSascha Wildner * GNU General Public License ("GPL") version 2 as published by the Free
1480d02842fSSascha Wildner * Software Foundation.
1490d02842fSSascha Wildner *
150b4315fc7SSascha Wildner *****************************************************************************/
1510d02842fSSascha Wildner
1520d02842fSSascha Wildner #include "acpi.h"
1530d02842fSSascha Wildner #include "accommon.h"
1540d02842fSSascha Wildner #include "amlcode.h"
1550d02842fSSascha Wildner #include "acdispat.h"
1560d02842fSSascha Wildner #include "acinterp.h"
1570d02842fSSascha Wildner #include "acnamesp.h"
1580d02842fSSascha Wildner
1590d02842fSSascha Wildner
1600d02842fSSascha Wildner #define _COMPONENT ACPI_EXECUTER
1610d02842fSSascha Wildner ACPI_MODULE_NAME ("exresolv")
1620d02842fSSascha Wildner
1630d02842fSSascha Wildner /* Local prototypes */
1640d02842fSSascha Wildner
1650d02842fSSascha Wildner static ACPI_STATUS
1660d02842fSSascha Wildner AcpiExResolveObjectToValue (
1670d02842fSSascha Wildner ACPI_OPERAND_OBJECT **StackPtr,
1680d02842fSSascha Wildner ACPI_WALK_STATE *WalkState);
1690d02842fSSascha Wildner
1700d02842fSSascha Wildner
1710d02842fSSascha Wildner /*******************************************************************************
1720d02842fSSascha Wildner *
1730d02842fSSascha Wildner * FUNCTION: AcpiExResolveToValue
1740d02842fSSascha Wildner *
1750d02842fSSascha Wildner * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
1760d02842fSSascha Wildner * be either an (ACPI_OPERAND_OBJECT *)
1770d02842fSSascha Wildner * or an ACPI_HANDLE.
1780d02842fSSascha Wildner * WalkState - Current method state
1790d02842fSSascha Wildner *
1800d02842fSSascha Wildner * RETURN: Status
1810d02842fSSascha Wildner *
1820d02842fSSascha Wildner * DESCRIPTION: Convert Reference objects to values
1830d02842fSSascha Wildner *
1840d02842fSSascha Wildner ******************************************************************************/
1850d02842fSSascha Wildner
1860d02842fSSascha Wildner ACPI_STATUS
AcpiExResolveToValue(ACPI_OPERAND_OBJECT ** StackPtr,ACPI_WALK_STATE * WalkState)1870d02842fSSascha Wildner AcpiExResolveToValue (
1880d02842fSSascha Wildner ACPI_OPERAND_OBJECT **StackPtr,
1890d02842fSSascha Wildner ACPI_WALK_STATE *WalkState)
1900d02842fSSascha Wildner {
1910d02842fSSascha Wildner ACPI_STATUS Status;
1920d02842fSSascha Wildner
1930d02842fSSascha Wildner
1940d02842fSSascha Wildner ACPI_FUNCTION_TRACE_PTR (ExResolveToValue, StackPtr);
1950d02842fSSascha Wildner
1960d02842fSSascha Wildner
1970d02842fSSascha Wildner if (!StackPtr || !*StackPtr)
1980d02842fSSascha Wildner {
1990d02842fSSascha Wildner ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
2000d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_NO_OPERAND);
2010d02842fSSascha Wildner }
2020d02842fSSascha Wildner
2030d02842fSSascha Wildner /*
2040d02842fSSascha Wildner * The entity pointed to by the StackPtr can be either
2050d02842fSSascha Wildner * 1) A valid ACPI_OPERAND_OBJECT, or
2060d02842fSSascha Wildner * 2) A ACPI_NAMESPACE_NODE (NamedObj)
2070d02842fSSascha Wildner */
2080d02842fSSascha Wildner if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
2090d02842fSSascha Wildner {
2100d02842fSSascha Wildner Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
2110d02842fSSascha Wildner if (ACPI_FAILURE (Status))
2120d02842fSSascha Wildner {
2130d02842fSSascha Wildner return_ACPI_STATUS (Status);
2140d02842fSSascha Wildner }
2150d02842fSSascha Wildner
2160d02842fSSascha Wildner if (!*StackPtr)
2170d02842fSSascha Wildner {
2180d02842fSSascha Wildner ACPI_ERROR ((AE_INFO, "Internal - null pointer"));
2190d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_NO_OPERAND);
2200d02842fSSascha Wildner }
2210d02842fSSascha Wildner }
2220d02842fSSascha Wildner
2230d02842fSSascha Wildner /*
2240d02842fSSascha Wildner * Object on the stack may have changed if AcpiExResolveObjectToValue()
2250d02842fSSascha Wildner * was called (i.e., we can't use an _else_ here.)
2260d02842fSSascha Wildner */
2270d02842fSSascha Wildner if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
2280d02842fSSascha Wildner {
2290d02842fSSascha Wildner Status = AcpiExResolveNodeToValue (
2300d02842fSSascha Wildner ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
2310d02842fSSascha Wildner WalkState);
2320d02842fSSascha Wildner if (ACPI_FAILURE (Status))
2330d02842fSSascha Wildner {
2340d02842fSSascha Wildner return_ACPI_STATUS (Status);
2350d02842fSSascha Wildner }
2360d02842fSSascha Wildner }
2370d02842fSSascha Wildner
2380d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
2390d02842fSSascha Wildner return_ACPI_STATUS (AE_OK);
2400d02842fSSascha Wildner }
2410d02842fSSascha Wildner
2420d02842fSSascha Wildner
2430d02842fSSascha Wildner /*******************************************************************************
2440d02842fSSascha Wildner *
2450d02842fSSascha Wildner * FUNCTION: AcpiExResolveObjectToValue
2460d02842fSSascha Wildner *
2470d02842fSSascha Wildner * PARAMETERS: StackPtr - Pointer to an internal object
2480d02842fSSascha Wildner * WalkState - Current method state
2490d02842fSSascha Wildner *
2500d02842fSSascha Wildner * RETURN: Status
2510d02842fSSascha Wildner *
2520d02842fSSascha Wildner * DESCRIPTION: Retrieve the value from an internal object. The Reference type
2530d02842fSSascha Wildner * uses the associated AML opcode to determine the value.
2540d02842fSSascha Wildner *
2550d02842fSSascha Wildner ******************************************************************************/
2560d02842fSSascha Wildner
2570d02842fSSascha Wildner static ACPI_STATUS
AcpiExResolveObjectToValue(ACPI_OPERAND_OBJECT ** StackPtr,ACPI_WALK_STATE * WalkState)2580d02842fSSascha Wildner AcpiExResolveObjectToValue (
2590d02842fSSascha Wildner ACPI_OPERAND_OBJECT **StackPtr,
2600d02842fSSascha Wildner ACPI_WALK_STATE *WalkState)
2610d02842fSSascha Wildner {
2620d02842fSSascha Wildner ACPI_STATUS Status = AE_OK;
2630d02842fSSascha Wildner ACPI_OPERAND_OBJECT *StackDesc;
2640d02842fSSascha Wildner ACPI_OPERAND_OBJECT *ObjDesc = NULL;
2650d02842fSSascha Wildner UINT8 RefType;
2660d02842fSSascha Wildner
2670d02842fSSascha Wildner
2680d02842fSSascha Wildner ACPI_FUNCTION_TRACE (ExResolveObjectToValue);
2690d02842fSSascha Wildner
2700d02842fSSascha Wildner
2710d02842fSSascha Wildner StackDesc = *StackPtr;
2720d02842fSSascha Wildner
2730d02842fSSascha Wildner /* This is an object of type ACPI_OPERAND_OBJECT */
2740d02842fSSascha Wildner
2750d02842fSSascha Wildner switch (StackDesc->Common.Type)
2760d02842fSSascha Wildner {
2770d02842fSSascha Wildner case ACPI_TYPE_LOCAL_REFERENCE:
2780d02842fSSascha Wildner
2790d02842fSSascha Wildner RefType = StackDesc->Reference.Class;
2800d02842fSSascha Wildner
2810d02842fSSascha Wildner switch (RefType)
2820d02842fSSascha Wildner {
2830d02842fSSascha Wildner case ACPI_REFCLASS_LOCAL:
2840d02842fSSascha Wildner case ACPI_REFCLASS_ARG:
2850d02842fSSascha Wildner /*
2860d02842fSSascha Wildner * Get the local from the method's state info
2870d02842fSSascha Wildner * Note: this increments the local's object reference count
2880d02842fSSascha Wildner */
2890d02842fSSascha Wildner Status = AcpiDsMethodDataGetValue (RefType,
2900d02842fSSascha Wildner StackDesc->Reference.Value, WalkState, &ObjDesc);
2910d02842fSSascha Wildner if (ACPI_FAILURE (Status))
2920d02842fSSascha Wildner {
2930d02842fSSascha Wildner return_ACPI_STATUS (Status);
2940d02842fSSascha Wildner }
2950d02842fSSascha Wildner
2960d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n",
2970d02842fSSascha Wildner StackDesc->Reference.Value, ObjDesc));
2980d02842fSSascha Wildner
2990d02842fSSascha Wildner /*
3000d02842fSSascha Wildner * Now we can delete the original Reference Object and
3010d02842fSSascha Wildner * replace it with the resolved value
3020d02842fSSascha Wildner */
3030d02842fSSascha Wildner AcpiUtRemoveReference (StackDesc);
3040d02842fSSascha Wildner *StackPtr = ObjDesc;
3050d02842fSSascha Wildner break;
3060d02842fSSascha Wildner
3070d02842fSSascha Wildner case ACPI_REFCLASS_INDEX:
3080d02842fSSascha Wildner
3090d02842fSSascha Wildner switch (StackDesc->Reference.TargetType)
3100d02842fSSascha Wildner {
3110d02842fSSascha Wildner case ACPI_TYPE_BUFFER_FIELD:
3120d02842fSSascha Wildner
3130d02842fSSascha Wildner /* Just return - do not dereference */
3140d02842fSSascha Wildner break;
3150d02842fSSascha Wildner
3160d02842fSSascha Wildner case ACPI_TYPE_PACKAGE:
3170d02842fSSascha Wildner
3180d02842fSSascha Wildner /* If method call or CopyObject - do not dereference */
3190d02842fSSascha Wildner
3200d02842fSSascha Wildner if ((WalkState->Opcode == AML_INT_METHODCALL_OP) ||
321d638c6eeSSascha Wildner (WalkState->Opcode == AML_COPY_OBJECT_OP))
3220d02842fSSascha Wildner {
3230d02842fSSascha Wildner break;
3240d02842fSSascha Wildner }
3250d02842fSSascha Wildner
3260d02842fSSascha Wildner /* Otherwise, dereference the PackageIndex to a package element */
3270d02842fSSascha Wildner
3280d02842fSSascha Wildner ObjDesc = *StackDesc->Reference.Where;
3290d02842fSSascha Wildner if (ObjDesc)
3300d02842fSSascha Wildner {
3310d02842fSSascha Wildner /*
3320d02842fSSascha Wildner * Valid object descriptor, copy pointer to return value
3330d02842fSSascha Wildner * (i.e., dereference the package index)
3340d02842fSSascha Wildner * Delete the ref object, increment the returned object
3350d02842fSSascha Wildner */
3360d02842fSSascha Wildner AcpiUtAddReference (ObjDesc);
3370d02842fSSascha Wildner *StackPtr = ObjDesc;
3380d02842fSSascha Wildner }
3390d02842fSSascha Wildner else
3400d02842fSSascha Wildner {
3410d02842fSSascha Wildner /*
3420d02842fSSascha Wildner * A NULL object descriptor means an uninitialized element of
3430d02842fSSascha Wildner * the package, can't dereference it
3440d02842fSSascha Wildner */
3450d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
346820c5b08SSascha Wildner "Attempt to dereference an Index to "
347820c5b08SSascha Wildner "NULL package element Idx=%p",
3480d02842fSSascha Wildner StackDesc));
3490d02842fSSascha Wildner Status = AE_AML_UNINITIALIZED_ELEMENT;
3500d02842fSSascha Wildner }
3510d02842fSSascha Wildner break;
3520d02842fSSascha Wildner
3530d02842fSSascha Wildner default:
3540d02842fSSascha Wildner
3550d02842fSSascha Wildner /* Invalid reference object */
3560d02842fSSascha Wildner
3570d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
3580d02842fSSascha Wildner "Unknown TargetType 0x%X in Index/Reference object %p",
3590d02842fSSascha Wildner StackDesc->Reference.TargetType, StackDesc));
3600d02842fSSascha Wildner Status = AE_AML_INTERNAL;
3610d02842fSSascha Wildner break;
3620d02842fSSascha Wildner }
3630d02842fSSascha Wildner break;
3640d02842fSSascha Wildner
3650d02842fSSascha Wildner case ACPI_REFCLASS_REFOF:
3660d02842fSSascha Wildner case ACPI_REFCLASS_DEBUG:
3670d02842fSSascha Wildner case ACPI_REFCLASS_TABLE:
3680d02842fSSascha Wildner
3690d02842fSSascha Wildner /* Just leave the object as-is, do not dereference */
3700d02842fSSascha Wildner
3710d02842fSSascha Wildner break;
3720d02842fSSascha Wildner
3730d02842fSSascha Wildner case ACPI_REFCLASS_NAME: /* Reference to a named object */
3740d02842fSSascha Wildner
3750d02842fSSascha Wildner /* Dereference the name */
3760d02842fSSascha Wildner
3770d02842fSSascha Wildner if ((StackDesc->Reference.Node->Type == ACPI_TYPE_DEVICE) ||
3780d02842fSSascha Wildner (StackDesc->Reference.Node->Type == ACPI_TYPE_THERMAL))
3790d02842fSSascha Wildner {
3800d02842fSSascha Wildner /* These node types do not have 'real' subobjects */
3810d02842fSSascha Wildner
3820d02842fSSascha Wildner *StackPtr = (void *) StackDesc->Reference.Node;
3830d02842fSSascha Wildner }
3840d02842fSSascha Wildner else
3850d02842fSSascha Wildner {
3860d02842fSSascha Wildner /* Get the object pointed to by the namespace node */
3870d02842fSSascha Wildner
3880d02842fSSascha Wildner *StackPtr = (StackDesc->Reference.Node)->Object;
3890d02842fSSascha Wildner AcpiUtAddReference (*StackPtr);
3900d02842fSSascha Wildner }
3910d02842fSSascha Wildner
3920d02842fSSascha Wildner AcpiUtRemoveReference (StackDesc);
3930d02842fSSascha Wildner break;
3940d02842fSSascha Wildner
3950d02842fSSascha Wildner default:
3960d02842fSSascha Wildner
3970d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
398820c5b08SSascha Wildner "Unknown Reference type 0x%X in %p",
399820c5b08SSascha Wildner RefType, StackDesc));
4000d02842fSSascha Wildner Status = AE_AML_INTERNAL;
4010d02842fSSascha Wildner break;
4020d02842fSSascha Wildner }
4030d02842fSSascha Wildner break;
4040d02842fSSascha Wildner
4050d02842fSSascha Wildner case ACPI_TYPE_BUFFER:
4060d02842fSSascha Wildner
4070d02842fSSascha Wildner Status = AcpiDsGetBufferArguments (StackDesc);
4080d02842fSSascha Wildner break;
4090d02842fSSascha Wildner
4100d02842fSSascha Wildner case ACPI_TYPE_PACKAGE:
4110d02842fSSascha Wildner
4120d02842fSSascha Wildner Status = AcpiDsGetPackageArguments (StackDesc);
4130d02842fSSascha Wildner break;
4140d02842fSSascha Wildner
4150d02842fSSascha Wildner case ACPI_TYPE_BUFFER_FIELD:
4160d02842fSSascha Wildner case ACPI_TYPE_LOCAL_REGION_FIELD:
4170d02842fSSascha Wildner case ACPI_TYPE_LOCAL_BANK_FIELD:
4180d02842fSSascha Wildner case ACPI_TYPE_LOCAL_INDEX_FIELD:
4190d02842fSSascha Wildner
420820c5b08SSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
421820c5b08SSascha Wildner "FieldRead SourceDesc=%p Type=%X\n",
4220d02842fSSascha Wildner StackDesc, StackDesc->Common.Type));
4230d02842fSSascha Wildner
4240d02842fSSascha Wildner Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
4250d02842fSSascha Wildner
4260d02842fSSascha Wildner /* Remove a reference to the original operand, then override */
4270d02842fSSascha Wildner
4280d02842fSSascha Wildner AcpiUtRemoveReference (*StackPtr);
4290d02842fSSascha Wildner *StackPtr = (void *) ObjDesc;
4300d02842fSSascha Wildner break;
4310d02842fSSascha Wildner
4320d02842fSSascha Wildner default:
4330d02842fSSascha Wildner
4340d02842fSSascha Wildner break;
4350d02842fSSascha Wildner }
4360d02842fSSascha Wildner
4370d02842fSSascha Wildner return_ACPI_STATUS (Status);
4380d02842fSSascha Wildner }
4390d02842fSSascha Wildner
4400d02842fSSascha Wildner
4410d02842fSSascha Wildner /*******************************************************************************
4420d02842fSSascha Wildner *
4430d02842fSSascha Wildner * FUNCTION: AcpiExResolveMultiple
4440d02842fSSascha Wildner *
4450d02842fSSascha Wildner * PARAMETERS: WalkState - Current state (contains AML opcode)
4460d02842fSSascha Wildner * Operand - Starting point for resolution
4470d02842fSSascha Wildner * ReturnType - Where the object type is returned
4480d02842fSSascha Wildner * ReturnDesc - Where the resolved object is returned
4490d02842fSSascha Wildner *
4500d02842fSSascha Wildner * RETURN: Status
4510d02842fSSascha Wildner *
4520d02842fSSascha Wildner * DESCRIPTION: Return the base object and type. Traverse a reference list if
4530d02842fSSascha Wildner * necessary to get to the base object.
4540d02842fSSascha Wildner *
4550d02842fSSascha Wildner ******************************************************************************/
4560d02842fSSascha Wildner
4570d02842fSSascha Wildner ACPI_STATUS
AcpiExResolveMultiple(ACPI_WALK_STATE * WalkState,ACPI_OPERAND_OBJECT * Operand,ACPI_OBJECT_TYPE * ReturnType,ACPI_OPERAND_OBJECT ** ReturnDesc)4580d02842fSSascha Wildner AcpiExResolveMultiple (
4590d02842fSSascha Wildner ACPI_WALK_STATE *WalkState,
4600d02842fSSascha Wildner ACPI_OPERAND_OBJECT *Operand,
4610d02842fSSascha Wildner ACPI_OBJECT_TYPE *ReturnType,
4620d02842fSSascha Wildner ACPI_OPERAND_OBJECT **ReturnDesc)
4630d02842fSSascha Wildner {
4643cc0afc6SSascha Wildner ACPI_OPERAND_OBJECT *ObjDesc = ACPI_CAST_PTR (void, Operand);
4653cc0afc6SSascha Wildner ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Operand);
4660d02842fSSascha Wildner ACPI_OBJECT_TYPE Type;
4670d02842fSSascha Wildner ACPI_STATUS Status;
4680d02842fSSascha Wildner
4690d02842fSSascha Wildner
4700d02842fSSascha Wildner ACPI_FUNCTION_TRACE (AcpiExResolveMultiple);
4710d02842fSSascha Wildner
4720d02842fSSascha Wildner
4730d02842fSSascha Wildner /* Operand can be either a namespace node or an operand descriptor */
4740d02842fSSascha Wildner
4750d02842fSSascha Wildner switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
4760d02842fSSascha Wildner {
4770d02842fSSascha Wildner case ACPI_DESC_TYPE_OPERAND:
4780d02842fSSascha Wildner
4790d02842fSSascha Wildner Type = ObjDesc->Common.Type;
4800d02842fSSascha Wildner break;
4810d02842fSSascha Wildner
4820d02842fSSascha Wildner case ACPI_DESC_TYPE_NAMED:
4830d02842fSSascha Wildner
4840d02842fSSascha Wildner Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
4853cc0afc6SSascha Wildner ObjDesc = AcpiNsGetAttachedObject (Node);
4860d02842fSSascha Wildner
4870d02842fSSascha Wildner /* If we had an Alias node, use the attached object for type info */
4880d02842fSSascha Wildner
4890d02842fSSascha Wildner if (Type == ACPI_TYPE_LOCAL_ALIAS)
4900d02842fSSascha Wildner {
4910d02842fSSascha Wildner Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
492820c5b08SSascha Wildner ObjDesc = AcpiNsGetAttachedObject (
493820c5b08SSascha Wildner (ACPI_NAMESPACE_NODE *) ObjDesc);
4940d02842fSSascha Wildner }
4953cc0afc6SSascha Wildner
4961093ca81SSascha Wildner switch (Type)
4971093ca81SSascha Wildner {
4981093ca81SSascha Wildner case ACPI_TYPE_DEVICE:
4991093ca81SSascha Wildner case ACPI_TYPE_THERMAL:
5001093ca81SSascha Wildner
5011093ca81SSascha Wildner /* These types have no attached subobject */
5021093ca81SSascha Wildner break;
5031093ca81SSascha Wildner
5041093ca81SSascha Wildner default:
5051093ca81SSascha Wildner
5061093ca81SSascha Wildner /* All other types require a subobject */
5071093ca81SSascha Wildner
5083cc0afc6SSascha Wildner if (!ObjDesc)
5093cc0afc6SSascha Wildner {
5103cc0afc6SSascha Wildner ACPI_ERROR ((AE_INFO,
5113cc0afc6SSascha Wildner "[%4.4s] Node is unresolved or uninitialized",
5123cc0afc6SSascha Wildner AcpiUtGetNodeName (Node)));
5133cc0afc6SSascha Wildner return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE);
5143cc0afc6SSascha Wildner }
5150d02842fSSascha Wildner break;
5161093ca81SSascha Wildner }
5171093ca81SSascha Wildner break;
5180d02842fSSascha Wildner
5190d02842fSSascha Wildner default:
5200d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
5210d02842fSSascha Wildner }
5220d02842fSSascha Wildner
5230d02842fSSascha Wildner /* If type is anything other than a reference, we are done */
5240d02842fSSascha Wildner
5250d02842fSSascha Wildner if (Type != ACPI_TYPE_LOCAL_REFERENCE)
5260d02842fSSascha Wildner {
5270d02842fSSascha Wildner goto Exit;
5280d02842fSSascha Wildner }
5290d02842fSSascha Wildner
5300d02842fSSascha Wildner /*
5310d02842fSSascha Wildner * For reference objects created via the RefOf, Index, or Load/LoadTable
5320d02842fSSascha Wildner * operators, we need to get to the base object (as per the ACPI
5330d02842fSSascha Wildner * specification of the ObjectType and SizeOf operators). This means
5340d02842fSSascha Wildner * traversing the list of possibly many nested references.
5350d02842fSSascha Wildner */
5360d02842fSSascha Wildner while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
5370d02842fSSascha Wildner {
5380d02842fSSascha Wildner switch (ObjDesc->Reference.Class)
5390d02842fSSascha Wildner {
5400d02842fSSascha Wildner case ACPI_REFCLASS_REFOF:
5410d02842fSSascha Wildner case ACPI_REFCLASS_NAME:
5420d02842fSSascha Wildner
5430d02842fSSascha Wildner /* Dereference the reference pointer */
5440d02842fSSascha Wildner
5450d02842fSSascha Wildner if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF)
5460d02842fSSascha Wildner {
5470d02842fSSascha Wildner Node = ObjDesc->Reference.Object;
5480d02842fSSascha Wildner }
5490d02842fSSascha Wildner else /* AML_INT_NAMEPATH_OP */
5500d02842fSSascha Wildner {
5510d02842fSSascha Wildner Node = ObjDesc->Reference.Node;
5520d02842fSSascha Wildner }
5530d02842fSSascha Wildner
5540d02842fSSascha Wildner /* All "References" point to a NS node */
5550d02842fSSascha Wildner
5560d02842fSSascha Wildner if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
5570d02842fSSascha Wildner {
5580d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
5590d02842fSSascha Wildner "Not a namespace node %p [%s]",
5600d02842fSSascha Wildner Node, AcpiUtGetDescriptorName (Node)));
5610d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_INTERNAL);
5620d02842fSSascha Wildner }
5630d02842fSSascha Wildner
5640d02842fSSascha Wildner /* Get the attached object */
5650d02842fSSascha Wildner
5660d02842fSSascha Wildner ObjDesc = AcpiNsGetAttachedObject (Node);
5670d02842fSSascha Wildner if (!ObjDesc)
5680d02842fSSascha Wildner {
5690d02842fSSascha Wildner /* No object, use the NS node type */
5700d02842fSSascha Wildner
5710d02842fSSascha Wildner Type = AcpiNsGetType (Node);
5720d02842fSSascha Wildner goto Exit;
5730d02842fSSascha Wildner }
5740d02842fSSascha Wildner
5750d02842fSSascha Wildner /* Check for circular references */
5760d02842fSSascha Wildner
5770d02842fSSascha Wildner if (ObjDesc == Operand)
5780d02842fSSascha Wildner {
5790d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
5800d02842fSSascha Wildner }
5810d02842fSSascha Wildner break;
5820d02842fSSascha Wildner
5830d02842fSSascha Wildner case ACPI_REFCLASS_INDEX:
5840d02842fSSascha Wildner
5850d02842fSSascha Wildner /* Get the type of this reference (index into another object) */
5860d02842fSSascha Wildner
5870d02842fSSascha Wildner Type = ObjDesc->Reference.TargetType;
5880d02842fSSascha Wildner if (Type != ACPI_TYPE_PACKAGE)
5890d02842fSSascha Wildner {
5900d02842fSSascha Wildner goto Exit;
5910d02842fSSascha Wildner }
5920d02842fSSascha Wildner
5930d02842fSSascha Wildner /*
5940d02842fSSascha Wildner * The main object is a package, we want to get the type
5950d02842fSSascha Wildner * of the individual package element that is referenced by
5960d02842fSSascha Wildner * the index.
5970d02842fSSascha Wildner *
5980d02842fSSascha Wildner * This could of course in turn be another reference object.
5990d02842fSSascha Wildner */
6000d02842fSSascha Wildner ObjDesc = *(ObjDesc->Reference.Where);
6010d02842fSSascha Wildner if (!ObjDesc)
6020d02842fSSascha Wildner {
6030d02842fSSascha Wildner /* NULL package elements are allowed */
6040d02842fSSascha Wildner
6050d02842fSSascha Wildner Type = 0; /* Uninitialized */
6060d02842fSSascha Wildner goto Exit;
6070d02842fSSascha Wildner }
6080d02842fSSascha Wildner break;
6090d02842fSSascha Wildner
6100d02842fSSascha Wildner case ACPI_REFCLASS_TABLE:
6110d02842fSSascha Wildner
6120d02842fSSascha Wildner Type = ACPI_TYPE_DDB_HANDLE;
6130d02842fSSascha Wildner goto Exit;
6140d02842fSSascha Wildner
6150d02842fSSascha Wildner case ACPI_REFCLASS_LOCAL:
6160d02842fSSascha Wildner case ACPI_REFCLASS_ARG:
6170d02842fSSascha Wildner
6180d02842fSSascha Wildner if (ReturnDesc)
6190d02842fSSascha Wildner {
6200d02842fSSascha Wildner Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class,
6210d02842fSSascha Wildner ObjDesc->Reference.Value, WalkState, &ObjDesc);
6220d02842fSSascha Wildner if (ACPI_FAILURE (Status))
6230d02842fSSascha Wildner {
6240d02842fSSascha Wildner return_ACPI_STATUS (Status);
6250d02842fSSascha Wildner }
6260d02842fSSascha Wildner AcpiUtRemoveReference (ObjDesc);
6270d02842fSSascha Wildner }
6280d02842fSSascha Wildner else
6290d02842fSSascha Wildner {
6300d02842fSSascha Wildner Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class,
6310d02842fSSascha Wildner ObjDesc->Reference.Value, WalkState, &Node);
6320d02842fSSascha Wildner if (ACPI_FAILURE (Status))
6330d02842fSSascha Wildner {
6340d02842fSSascha Wildner return_ACPI_STATUS (Status);
6350d02842fSSascha Wildner }
6360d02842fSSascha Wildner
6370d02842fSSascha Wildner ObjDesc = AcpiNsGetAttachedObject (Node);
6380d02842fSSascha Wildner if (!ObjDesc)
6390d02842fSSascha Wildner {
6400d02842fSSascha Wildner Type = ACPI_TYPE_ANY;
6410d02842fSSascha Wildner goto Exit;
6420d02842fSSascha Wildner }
6430d02842fSSascha Wildner }
6440d02842fSSascha Wildner break;
6450d02842fSSascha Wildner
6460d02842fSSascha Wildner case ACPI_REFCLASS_DEBUG:
6470d02842fSSascha Wildner
6480d02842fSSascha Wildner /* The Debug Object is of type "DebugObject" */
6490d02842fSSascha Wildner
6500d02842fSSascha Wildner Type = ACPI_TYPE_DEBUG_OBJECT;
6510d02842fSSascha Wildner goto Exit;
6520d02842fSSascha Wildner
6530d02842fSSascha Wildner default:
6540d02842fSSascha Wildner
6550d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
656820c5b08SSascha Wildner "Unknown Reference Class 0x%2.2X",
657820c5b08SSascha Wildner ObjDesc->Reference.Class));
6580d02842fSSascha Wildner return_ACPI_STATUS (AE_AML_INTERNAL);
6590d02842fSSascha Wildner }
6600d02842fSSascha Wildner }
6610d02842fSSascha Wildner
6620d02842fSSascha Wildner /*
6630d02842fSSascha Wildner * Now we are guaranteed to have an object that has not been created
6640d02842fSSascha Wildner * via the RefOf or Index operators.
6650d02842fSSascha Wildner */
6660d02842fSSascha Wildner Type = ObjDesc->Common.Type;
6670d02842fSSascha Wildner
6680d02842fSSascha Wildner
6690d02842fSSascha Wildner Exit:
6700d02842fSSascha Wildner /* Convert internal types to external types */
6710d02842fSSascha Wildner
6720d02842fSSascha Wildner switch (Type)
6730d02842fSSascha Wildner {
6740d02842fSSascha Wildner case ACPI_TYPE_LOCAL_REGION_FIELD:
6750d02842fSSascha Wildner case ACPI_TYPE_LOCAL_BANK_FIELD:
6760d02842fSSascha Wildner case ACPI_TYPE_LOCAL_INDEX_FIELD:
6770d02842fSSascha Wildner
6780d02842fSSascha Wildner Type = ACPI_TYPE_FIELD_UNIT;
6790d02842fSSascha Wildner break;
6800d02842fSSascha Wildner
6810d02842fSSascha Wildner case ACPI_TYPE_LOCAL_SCOPE:
6820d02842fSSascha Wildner
6830d02842fSSascha Wildner /* Per ACPI Specification, Scope is untyped */
6840d02842fSSascha Wildner
6850d02842fSSascha Wildner Type = ACPI_TYPE_ANY;
6860d02842fSSascha Wildner break;
6870d02842fSSascha Wildner
6880d02842fSSascha Wildner default:
6890d02842fSSascha Wildner
6900d02842fSSascha Wildner /* No change to Type required */
6910d02842fSSascha Wildner
6920d02842fSSascha Wildner break;
6930d02842fSSascha Wildner }
6940d02842fSSascha Wildner
6950d02842fSSascha Wildner *ReturnType = Type;
6960d02842fSSascha Wildner if (ReturnDesc)
6970d02842fSSascha Wildner {
6980d02842fSSascha Wildner *ReturnDesc = ObjDesc;
6990d02842fSSascha Wildner }
7000d02842fSSascha Wildner return_ACPI_STATUS (AE_OK);
7010d02842fSSascha Wildner }
702