xref: /dflybsd-src/sys/contrib/dev/acpica/source/components/executer/exresolv.c (revision 383048aca08c2de51d27aa8638a36982a0d74550)
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