2 /******************************************************************************
4 * Module Name: exresolv - AML Interpreter object resolution
7 *****************************************************************************/
9 /******************************************************************************
13 * Some or all of this work - Copyright (c) 1999 - 2003, 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 *****************************************************************************/
117 /* $DragonFly: src/sys/contrib/dev/acpica/Attic/exresolv.c,v 1.1 2003/09/24 03:32:16 drhodus Exp $ */
119 #define __EXRESOLV_C__
123 #include "acdispat.h"
124 #include "acinterp.h"
125 #include "acnamesp.h"
128 #define _COMPONENT ACPI_EXECUTER
129 ACPI_MODULE_NAME ("exresolv")
132 /*******************************************************************************
134 * FUNCTION: AcpiExResolveToValue
136 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
137 * be either an (ACPI_OPERAND_OBJECT *)
139 * WalkState - Current method state
143 * DESCRIPTION: Convert Reference objects to values
145 ******************************************************************************/
148 AcpiExResolveToValue (
149 ACPI_OPERAND_OBJECT **StackPtr,
150 ACPI_WALK_STATE *WalkState)
155 ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr);
158 if (!StackPtr || !*StackPtr)
160 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
161 return_ACPI_STATUS (AE_AML_NO_OPERAND);
165 * The entity pointed to by the StackPtr can be either
166 * 1) A valid ACPI_OPERAND_OBJECT, or
167 * 2) A ACPI_NAMESPACE_NODE (NamedObj)
169 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
171 Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
172 if (ACPI_FAILURE (Status))
174 return_ACPI_STATUS (Status);
179 * Object on the stack may have changed if AcpiExResolveObjectToValue()
180 * was called (i.e., we can't use an _else_ here.)
182 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
184 Status = AcpiExResolveNodeToValue (
185 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
187 if (ACPI_FAILURE (Status))
189 return_ACPI_STATUS (Status);
193 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
194 return_ACPI_STATUS (AE_OK);
198 /*******************************************************************************
200 * FUNCTION: AcpiExResolveObjectToValue
202 * PARAMETERS: StackPtr - Pointer to a stack location that contains a
203 * ptr to an internal object.
204 * WalkState - Current method state
208 * DESCRIPTION: Retrieve the value from an internal object. The Reference type
209 * uses the associated AML opcode to determine the value.
211 ******************************************************************************/
214 AcpiExResolveObjectToValue (
215 ACPI_OPERAND_OBJECT **StackPtr,
216 ACPI_WALK_STATE *WalkState)
218 ACPI_STATUS Status = AE_OK;
219 ACPI_OPERAND_OBJECT *StackDesc;
221 ACPI_OPERAND_OBJECT *ObjDesc;
225 ACPI_FUNCTION_TRACE ("ExResolveObjectToValue");
228 StackDesc = *StackPtr;
230 /* This is an ACPI_OPERAND_OBJECT */
232 switch (ACPI_GET_OBJECT_TYPE (StackDesc))
234 case ACPI_TYPE_LOCAL_REFERENCE:
236 Opcode = StackDesc->Reference.Opcode;
243 * Convert indirect name ptr to a direct name ptr.
244 * Then, AcpiExResolveNodeToValue can be used to get the value
246 TempNode = StackDesc->Reference.Object;
248 /* Delete the Reference Object */
250 AcpiUtRemoveReference (StackDesc);
252 /* Put direct name pointer onto stack and exit */
254 (*StackPtr) = TempNode;
262 * Get the local from the method's state info
263 * Note: this increments the local's object reference count
265 Status = AcpiDsMethodDataGetValue (Opcode,
266 StackDesc->Reference.Offset, WalkState, &ObjDesc);
267 if (ACPI_FAILURE (Status))
269 return_ACPI_STATUS (Status);
273 * Now we can delete the original Reference Object and
274 * replace it with the resolve value
276 AcpiUtRemoveReference (StackDesc);
279 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %d] ValueObj is %p\n",
280 StackDesc->Reference.Offset, ObjDesc));
286 switch (StackDesc->Reference.TargetType)
288 case ACPI_TYPE_BUFFER_FIELD:
290 /* Just return - leave the Reference on the stack */
294 case ACPI_TYPE_PACKAGE:
296 ObjDesc = *StackDesc->Reference.Where;
300 * Valid obj descriptor, copy pointer to return value
301 * (i.e., dereference the package index)
302 * Delete the ref object, increment the returned object
304 AcpiUtRemoveReference (StackDesc);
305 AcpiUtAddReference (ObjDesc);
311 * A NULL object descriptor means an unitialized element of
312 * the package, can't dereference it
314 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
315 "Attempt to deref an Index to NULL pkg element Idx=%p\n",
317 Status = AE_AML_UNINITIALIZED_ELEMENT;
324 /* Invalid reference object */
326 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
327 "Unknown TargetType %X in Index/Reference obj %p\n",
328 StackDesc->Reference.TargetType, StackDesc));
329 Status = AE_AML_INTERNAL;
338 /* Just leave the object as-is */
345 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference opcode %X in %p\n",
347 Status = AE_AML_INTERNAL;
353 case ACPI_TYPE_BUFFER:
355 Status = AcpiDsGetBufferArguments (StackDesc);
359 case ACPI_TYPE_PACKAGE:
361 Status = AcpiDsGetPackageArguments (StackDesc);
366 * These cases may never happen here, but just in case..
368 case ACPI_TYPE_BUFFER_FIELD:
369 case ACPI_TYPE_LOCAL_REGION_FIELD:
370 case ACPI_TYPE_LOCAL_BANK_FIELD:
371 case ACPI_TYPE_LOCAL_INDEX_FIELD:
373 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n",
374 StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc)));
376 Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
377 *StackPtr = (void *) ObjDesc;
384 return_ACPI_STATUS (Status);
388 /*******************************************************************************
390 * FUNCTION: AcpiExResolveMultiple
392 * PARAMETERS: WalkState - Current state (contains AML opcode)
393 * Operand - Starting point for resolution
394 * ReturnType - Where the object type is returned
395 * ReturnDesc - Where the resolved object is returned
399 * DESCRIPTION: Return the base object and type. Traverse a reference list if
400 * necessary to get to the base object.
402 ******************************************************************************/
405 AcpiExResolveMultiple (
406 ACPI_WALK_STATE *WalkState,
407 ACPI_OPERAND_OBJECT *Operand,
408 ACPI_OBJECT_TYPE *ReturnType,
409 ACPI_OPERAND_OBJECT **ReturnDesc)
411 ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
412 ACPI_NAMESPACE_NODE *Node;
413 ACPI_OBJECT_TYPE Type;
416 ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple");
420 * For reference objects created via the RefOf or Index operators,
421 * we need to get to the base object (as per the ACPI specification
422 * of the ObjectType and SizeOf operators). This means traversing
423 * the list of possibly many nested references.
425 while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE)
427 switch (ObjDesc->Reference.Opcode)
431 /* Dereference the reference pointer */
433 Node = ObjDesc->Reference.Object;
435 /* All "References" point to a NS node */
437 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
439 return_ACPI_STATUS (AE_AML_INTERNAL);
442 /* Get the attached object */
444 ObjDesc = AcpiNsGetAttachedObject (Node);
447 /* No object, use the NS node type */
449 Type = AcpiNsGetType (Node);
453 /* Check for circular references */
455 if (ObjDesc == Operand)
457 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
464 /* Get the type of this reference (index into another object) */
466 Type = ObjDesc->Reference.TargetType;
467 if (Type != ACPI_TYPE_PACKAGE)
473 * The main object is a package, we want to get the type
474 * of the individual package element that is referenced by
477 * This could of course in turn be another reference object.
479 ObjDesc = *(ObjDesc->Reference.Where);
483 case AML_INT_NAMEPATH_OP:
485 /* Dereference the reference pointer */
487 Node = ObjDesc->Reference.Node;
489 /* All "References" point to a NS node */
491 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
493 return_ACPI_STATUS (AE_AML_INTERNAL);
496 /* Get the attached object */
498 ObjDesc = AcpiNsGetAttachedObject (Node);
501 /* No object, use the NS node type */
503 Type = AcpiNsGetType (Node);
507 /* Check for circular references */
509 if (ObjDesc == Operand)
511 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
518 /* The Debug Object is of type "DebugObject" */
520 Type = ACPI_TYPE_DEBUG_OBJECT;
526 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n",
527 ObjDesc->Reference.Opcode));
528 return_ACPI_STATUS (AE_AML_INTERNAL);
533 * Now we are guaranteed to have an object that has not been created
534 * via the RefOf or Index operators.
536 Type = ACPI_GET_OBJECT_TYPE (ObjDesc);
540 /* Convert internal types to external types */
544 case ACPI_TYPE_LOCAL_REGION_FIELD:
545 case ACPI_TYPE_LOCAL_BANK_FIELD:
546 case ACPI_TYPE_LOCAL_INDEX_FIELD:
548 Type = ACPI_TYPE_FIELD_UNIT;
551 case ACPI_TYPE_LOCAL_SCOPE:
553 /* Per ACPI Specification, Scope is untyped */
555 Type = ACPI_TYPE_ANY;
559 /* No change to Type required */
566 *ReturnDesc = ObjDesc;
568 return_ACPI_STATUS (AE_OK);