2 /******************************************************************************
4 * Module Name: exresolv - AML Interpreter object resolution
7 *****************************************************************************/
9 /******************************************************************************
13 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp.
14 * All rights reserved.
18 * 2.1. This is your license from Intel Corp. under its intellectual property
19 * rights. You may have additional license terms from the party that provided
20 * you this software, covering your right to use that party's intellectual
23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24 * copy of the source code appearing in this file ("Covered Code") an
25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26 * base code distributed originally by Intel ("Original Intel Code") to copy,
27 * make derivatives, distribute, use and display any portion of the Covered
28 * Code in any form, with the right to sublicense such rights; and
30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31 * license (with the right to sublicense), under only those claims of Intel
32 * patents that are infringed by the Original Intel Code, to make, use, sell,
33 * offer to sell, and import the Covered Code and derivative works thereof
34 * solely to the minimum extent necessary to exercise the above copyright
35 * license, and in no event shall the patent license extend to any additions
36 * to or modifications of the Original Intel Code. No other license or right
37 * is granted directly or by implication, estoppel or otherwise;
39 * The above copyright and patent license is granted only if the following
44 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45 * Redistribution of source code of any substantial portion of the Covered
46 * Code or modification with rights to further distribute source must include
47 * the above Copyright Notice, the above License, this list of Conditions,
48 * and the following Disclaimer and Export Compliance provision. In addition,
49 * Licensee must cause all Covered Code to which Licensee contributes to
50 * contain a file documenting the changes Licensee made to create that Covered
51 * Code and the date of any change. Licensee must include in that file the
52 * documentation of any changes made by any predecessor Licensee. Licensee
53 * must include a prominent statement that the modification is derived,
54 * directly or indirectly, from Original Intel Code.
56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57 * Redistribution of source code of any substantial portion of the Covered
58 * Code or modification without rights to further distribute source must
59 * include the following Disclaimer and Export Compliance provision in the
60 * documentation and/or other materials provided with distribution. In
61 * addition, Licensee may not authorize further sublicense of source of any
62 * portion of the Covered Code, and must include terms to the effect that the
63 * license from Licensee to its licensee is limited to the intellectual
64 * property embodied in the software Licensee provides to its licensee, and
65 * not to intellectual property embodied in modifications its licensee may
68 * 3.3. Redistribution of Executable. Redistribution in executable form of any
69 * substantial portion of the Covered Code or modification must reproduce the
70 * above Copyright Notice, and the following Disclaimer and Export Compliance
71 * provision in the documentation and/or other materials provided with the
74 * 3.4. Intel retains all right, title, and interest in and to the Original
77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78 * Intel shall be used in advertising or otherwise to promote the sale, use or
79 * other dealings in products derived from or relating to the Covered Code
80 * without prior written authorization from Intel.
82 * 4. Disclaimer and Export Compliance
84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
101 * 4.3. Licensee shall not export, either directly or indirectly, any of this
102 * software or system incorporating such software without first obtaining any
103 * required license or other approval from the U. S. Department of Commerce or
104 * any other agency or department of the United States Government. In the
105 * event Licensee exports any such software from the United States or
106 * re-exports any such software from a foreign destination, Licensee shall
107 * ensure that the distribution and export/re-export of the software is in
108 * compliance with all laws, regulations, orders, or other restrictions of the
109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110 * any of its subsidiaries will export/re-export any technical data, process,
111 * software, or service, directly or indirectly, to any country for which the
112 * United States government or any agency thereof requires an export license,
113 * other governmental approval, or letter of assurance, without first obtaining
114 * such license, approval or letter.
116 *****************************************************************************/
118 #define __EXRESOLV_C__
122 #include "acparser.h"
123 #include "acdispat.h"
124 #include "acinterp.h"
125 #include "acnamesp.h"
126 #include "actables.h"
127 #include "acevents.h"
130 #define _COMPONENT ACPI_EXECUTER
131 ACPI_MODULE_NAME ("exresolv")
134 /*******************************************************************************
136 * FUNCTION: AcpiExResolveToValue
138 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
139 * be either an (ACPI_OPERAND_OBJECT *)
141 * WalkState - Current method state
145 * DESCRIPTION: Convert Reference objects to values
147 ******************************************************************************/
150 AcpiExResolveToValue (
151 ACPI_OPERAND_OBJECT **StackPtr,
152 ACPI_WALK_STATE *WalkState)
157 ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr);
160 if (!StackPtr || !*StackPtr)
162 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
163 return_ACPI_STATUS (AE_AML_NO_OPERAND);
167 * The entity pointed to by the StackPtr can be either
168 * 1) A valid ACPI_OPERAND_OBJECT, or
169 * 2) A ACPI_NAMESPACE_NODE (NamedObj)
171 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_INTERNAL)
173 Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
174 if (ACPI_FAILURE (Status))
176 return_ACPI_STATUS (Status);
181 * Object on the stack may have changed if AcpiExResolveObjectToValue()
182 * was called (i.e., we can't use an _else_ here.)
184 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
186 Status = AcpiExResolveNodeToValue ((ACPI_NAMESPACE_NODE **) StackPtr,
188 if (ACPI_FAILURE (Status))
190 return_ACPI_STATUS (Status);
194 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
195 return_ACPI_STATUS (AE_OK);
199 /*******************************************************************************
201 * FUNCTION: AcpiExResolveObjectToValue
203 * PARAMETERS: StackPtr - Pointer to a stack location that contains a
204 * ptr to an internal object.
205 * WalkState - Current method state
209 * DESCRIPTION: Retrieve the value from an internal object. The Reference type
210 * uses the associated AML opcode to determine the value.
212 ******************************************************************************/
215 AcpiExResolveObjectToValue (
216 ACPI_OPERAND_OBJECT **StackPtr,
217 ACPI_WALK_STATE *WalkState)
219 ACPI_STATUS Status = AE_OK;
220 ACPI_OPERAND_OBJECT *StackDesc;
222 ACPI_OPERAND_OBJECT *ObjDesc;
226 ACPI_FUNCTION_TRACE ("ExResolveObjectToValue");
229 StackDesc = *StackPtr;
231 /* This is an ACPI_OPERAND_OBJECT */
233 switch (StackDesc->Common.Type)
235 case INTERNAL_TYPE_REFERENCE:
237 Opcode = StackDesc->Reference.Opcode;
244 * Convert indirect name ptr to a direct name ptr.
245 * Then, AcpiExResolveNodeToValue can be used to get the value
247 TempNode = StackDesc->Reference.Object;
249 /* Delete the Reference Object */
251 AcpiUtRemoveReference (StackDesc);
253 /* Put direct name pointer onto stack and exit */
255 (*StackPtr) = TempNode;
263 * Get the local from the method's state info
264 * Note: this increments the local's object reference count
266 Status = AcpiDsMethodDataGetValue (Opcode,
267 StackDesc->Reference.Offset, WalkState, &ObjDesc);
268 if (ACPI_FAILURE (Status))
270 return_ACPI_STATUS (Status);
274 * Now we can delete the original Reference Object and
275 * replace it with the resolve value
277 AcpiUtRemoveReference (StackDesc);
280 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %d] ValueObj is %p\n",
281 StackDesc->Reference.Offset, ObjDesc));
285 * For constants, we must change the reference/constant object
286 * to a real integer object
291 case AML_REVISION_OP:
293 /* Create a new integer object */
295 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
298 return_ACPI_STATUS (AE_NO_MEMORY);
304 ObjDesc->Integer.Value = 0;
308 ObjDesc->Integer.Value = 1;
312 ObjDesc->Integer.Value = ACPI_INTEGER_MAX;
314 /* Truncate value if we are executing from a 32-bit ACPI table */
316 AcpiExTruncateFor32bitTable (ObjDesc, WalkState);
319 case AML_REVISION_OP:
320 ObjDesc->Integer.Value = ACPI_CA_SUPPORT_LEVEL;
325 * Remove a reference from the original reference object
326 * and put the new object in its place
328 AcpiUtRemoveReference (StackDesc);
335 switch (StackDesc->Reference.TargetType)
337 case ACPI_TYPE_BUFFER_FIELD:
339 /* Just return - leave the Reference on the stack */
343 case ACPI_TYPE_PACKAGE:
344 ObjDesc = *StackDesc->Reference.Where;
348 * Valid obj descriptor, copy pointer to return value
349 * (i.e., dereference the package index)
350 * Delete the ref object, increment the returned object
352 AcpiUtRemoveReference (StackDesc);
353 AcpiUtAddReference (ObjDesc);
359 * A NULL object descriptor means an unitialized element of
360 * the package, can't dereference it
362 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
363 "Attempt to deref an Index to NULL pkg element Idx=%p\n",
365 Status = AE_AML_UNINITIALIZED_ELEMENT;
370 /* Invalid reference object */
372 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
373 "Unknown TargetType %X in Index/Reference obj %p\n",
374 StackDesc->Reference.TargetType, StackDesc));
375 Status = AE_AML_INTERNAL;
383 /* Just leave the object as-is */
389 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference object subtype %02X in %p\n",
391 Status = AE_AML_INTERNAL;
394 } /* switch (Opcode) */
396 break; /* case INTERNAL_TYPE_REFERENCE */
399 case ACPI_TYPE_BUFFER:
401 Status = AcpiDsGetBufferArguments (StackDesc);
405 case ACPI_TYPE_PACKAGE:
407 Status = AcpiDsGetPackageArguments (StackDesc);
412 * These cases may never happen here, but just in case..
414 case ACPI_TYPE_BUFFER_FIELD:
415 case INTERNAL_TYPE_REGION_FIELD:
416 case INTERNAL_TYPE_BANK_FIELD:
417 case INTERNAL_TYPE_INDEX_FIELD:
419 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n",
420 StackDesc, StackDesc->Common.Type));
422 Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
423 *StackPtr = (void *) ObjDesc;
430 return_ACPI_STATUS (Status);