1 /******************************************************************************
3 * Module Name: exresnte - AML Interpreter object resolution
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************
116 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
150 *****************************************************************************/
153 #include "accommon.h"
154 #include "acdispat.h"
155 #include "acinterp.h"
156 #include "acnamesp.h"
159 #define _COMPONENT ACPI_EXECUTER
160 ACPI_MODULE_NAME ("exresnte")
163 /*******************************************************************************
165 * FUNCTION: AcpiExResolveNodeToValue
167 * PARAMETERS: ObjectPtr - Pointer to a location that contains
168 * a pointer to a NS node, and will receive a
169 * pointer to the resolved object.
170 * WalkState - Current state. Valid only if executing AML
171 * code. NULL if simply resolving an object
175 * DESCRIPTION: Resolve a Namespace node to a valued object
177 * Note: for some of the data types, the pointer attached to the Node
178 * can be either a pointer to an actual internal object or a pointer into the
179 * AML stream itself. These types are currently:
187 ******************************************************************************/
190 AcpiExResolveNodeToValue (
191 ACPI_NAMESPACE_NODE
**ObjectPtr
,
192 ACPI_WALK_STATE
*WalkState
)
195 ACPI_STATUS Status
= AE_OK
;
196 ACPI_OPERAND_OBJECT
*SourceDesc
;
197 ACPI_OPERAND_OBJECT
*ObjDesc
= NULL
;
198 ACPI_NAMESPACE_NODE
*Node
;
199 ACPI_OBJECT_TYPE EntryType
;
202 ACPI_FUNCTION_TRACE (ExResolveNodeToValue
);
206 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
207 * object that is attached to the Node.
210 SourceDesc
= AcpiNsGetAttachedObject (Node
);
211 EntryType
= AcpiNsGetType ((ACPI_HANDLE
) Node
);
213 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC
, "Entry=%p SourceDesc=%p [%s]\n",
214 Node
, SourceDesc
, AcpiUtGetTypeName (EntryType
)));
216 if ((EntryType
== ACPI_TYPE_LOCAL_ALIAS
) ||
217 (EntryType
== ACPI_TYPE_LOCAL_METHOD_ALIAS
))
219 /* There is always exactly one level of indirection */
221 Node
= ACPI_CAST_PTR (ACPI_NAMESPACE_NODE
, Node
->Object
);
222 SourceDesc
= AcpiNsGetAttachedObject (Node
);
223 EntryType
= AcpiNsGetType ((ACPI_HANDLE
) Node
);
228 * Several object types require no further processing:
229 * 1) Device/Thermal objects don't have a "real" subobject, return Node
230 * 2) Method locals and arguments have a pseudo-Node
231 * 3) 10/2007: Added method type to assist with Package construction.
233 if ((EntryType
== ACPI_TYPE_DEVICE
) ||
234 (EntryType
== ACPI_TYPE_THERMAL
) ||
235 (EntryType
== ACPI_TYPE_METHOD
) ||
236 (Node
->Flags
& (ANOBJ_METHOD_ARG
| ANOBJ_METHOD_LOCAL
)))
238 return_ACPI_STATUS (AE_OK
);
243 ACPI_ERROR ((AE_INFO
, "No object attached to node [%4.4s] %p",
244 Node
->Name
.Ascii
, Node
));
245 return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE
);
249 * Action is based on the type of the Node, which indicates the type
250 * of the attached object or pointer
254 case ACPI_TYPE_PACKAGE
:
256 if (SourceDesc
->Common
.Type
!= ACPI_TYPE_PACKAGE
)
258 ACPI_ERROR ((AE_INFO
, "Object not a Package, type %s",
259 AcpiUtGetObjectTypeName (SourceDesc
)));
260 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
263 Status
= AcpiDsGetPackageArguments (SourceDesc
);
264 if (ACPI_SUCCESS (Status
))
266 /* Return an additional reference to the object */
268 ObjDesc
= SourceDesc
;
269 AcpiUtAddReference (ObjDesc
);
273 case ACPI_TYPE_BUFFER
:
275 if (SourceDesc
->Common
.Type
!= ACPI_TYPE_BUFFER
)
277 ACPI_ERROR ((AE_INFO
, "Object not a Buffer, type %s",
278 AcpiUtGetObjectTypeName (SourceDesc
)));
279 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
282 Status
= AcpiDsGetBufferArguments (SourceDesc
);
283 if (ACPI_SUCCESS (Status
))
285 /* Return an additional reference to the object */
287 ObjDesc
= SourceDesc
;
288 AcpiUtAddReference (ObjDesc
);
292 case ACPI_TYPE_STRING
:
294 if (SourceDesc
->Common
.Type
!= ACPI_TYPE_STRING
)
296 ACPI_ERROR ((AE_INFO
, "Object not a String, type %s",
297 AcpiUtGetObjectTypeName (SourceDesc
)));
298 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
301 /* Return an additional reference to the object */
303 ObjDesc
= SourceDesc
;
304 AcpiUtAddReference (ObjDesc
);
307 case ACPI_TYPE_INTEGER
:
309 if (SourceDesc
->Common
.Type
!= ACPI_TYPE_INTEGER
)
311 ACPI_ERROR ((AE_INFO
, "Object not a Integer, type %s",
312 AcpiUtGetObjectTypeName (SourceDesc
)));
313 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
316 /* Return an additional reference to the object */
318 ObjDesc
= SourceDesc
;
319 AcpiUtAddReference (ObjDesc
);
322 case ACPI_TYPE_BUFFER_FIELD
:
323 case ACPI_TYPE_LOCAL_REGION_FIELD
:
324 case ACPI_TYPE_LOCAL_BANK_FIELD
:
325 case ACPI_TYPE_LOCAL_INDEX_FIELD
:
327 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC
,
328 "FieldRead Node=%p SourceDesc=%p Type=%X\n",
329 Node
, SourceDesc
, EntryType
));
331 Status
= AcpiExReadDataFromField (WalkState
, SourceDesc
, &ObjDesc
);
334 /* For these objects, just return the object attached to the Node */
336 case ACPI_TYPE_MUTEX
:
337 case ACPI_TYPE_POWER
:
338 case ACPI_TYPE_PROCESSOR
:
339 case ACPI_TYPE_EVENT
:
340 case ACPI_TYPE_REGION
:
342 /* Return an additional reference to the object */
344 ObjDesc
= SourceDesc
;
345 AcpiUtAddReference (ObjDesc
);
348 /* TYPE_ANY is untyped, and thus there is no object associated with it */
352 ACPI_ERROR ((AE_INFO
,
353 "Untyped entry %p, no attached object!", Node
));
355 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
); /* Cannot be AE_TYPE */
357 case ACPI_TYPE_LOCAL_REFERENCE
:
359 switch (SourceDesc
->Reference
.Class
)
361 case ACPI_REFCLASS_TABLE
: /* This is a DdbHandle */
362 case ACPI_REFCLASS_REFOF
:
363 case ACPI_REFCLASS_INDEX
:
365 /* Return an additional reference to the object */
367 ObjDesc
= SourceDesc
;
368 AcpiUtAddReference (ObjDesc
);
373 /* No named references are allowed here */
375 ACPI_ERROR ((AE_INFO
,
376 "Unsupported Reference type 0x%X",
377 SourceDesc
->Reference
.Class
));
379 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
385 /* Default case is for unknown types */
387 ACPI_ERROR ((AE_INFO
,
388 "Node %p - Unknown object type 0x%X",
391 return_ACPI_STATUS (AE_AML_OPERAND_TYPE
);
393 } /* switch (EntryType) */
396 /* Return the object descriptor */
398 *ObjectPtr
= (void *) ObjDesc
;
399 return_ACPI_STATUS (Status
);