exresnte.c revision 82367 
1
2/******************************************************************************
3 *
4 * Module Name: exresnte - AML Interpreter object resolution
5 *              $Revision: 39 $
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp.
14 * All rights reserved.
15 *
16 * 2. License
17 *
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
21 * property rights.
22 *
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
29 *
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;
38 *
39 * The above copyright and patent license is granted only if the following
40 * conditions are met:
41 *
42 * 3. Conditions
43 *
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.
55 *
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
66 * make.
67 *
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
72 * distribution.
73 *
74 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * Intel Code.
76 *
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.
81 *
82 * 4. Disclaimer and Export Compliance
83 *
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
90 * PARTICULAR PURPOSE.
91 *
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
99 * LIMITED REMEDY.
100 *
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.
115 *
116 *****************************************************************************/
117
118#define __EXRESNTE_C__
119
120#include "acpi.h"
121#include "amlcode.h"
122#include "acparser.h"
123#include "acdispat.h"
124#include "acinterp.h"
125#include "acnamesp.h"
126#include "actables.h"
127#include "acevents.h"
128
129
130#define _COMPONENT          ACPI_EXECUTER
131        MODULE_NAME         ("exresnte")
132
133
134/*******************************************************************************
135 *
136 * FUNCTION:    AcpiExResolveNodeToValue
137 *
138 * PARAMETERS:  StackPtr        - Pointer to a location on a stack that contains
139 *                                a pointer to a Node
140 *              WalkState       - Current state
141 *
142 * RETURN:      Status
143 *
144 * DESCRIPTION: Resolve a Namespace node (AKA a "direct name pointer") to
145 *              a valued object
146 *
147 * Note: for some of the data types, the pointer attached to the Node
148 * can be either a pointer to an actual internal object or a pointer into the
149 * AML stream itself.  These types are currently:
150 *
151 *      ACPI_TYPE_INTEGER
152 *      ACPI_TYPE_STRING
153 *      ACPI_TYPE_BUFFER
154 *      ACPI_TYPE_MUTEX
155 *      ACPI_TYPE_PACKAGE
156 *
157 ******************************************************************************/
158
159ACPI_STATUS
160AcpiExResolveNodeToValue (
161    ACPI_NAMESPACE_NODE     **StackPtr,
162    ACPI_WALK_STATE         *WalkState)
163
164{
165    ACPI_STATUS             Status = AE_OK;
166    ACPI_OPERAND_OBJECT     *ValDesc;
167    ACPI_OPERAND_OBJECT     *ObjDesc = NULL;
168    ACPI_NAMESPACE_NODE     *Node;
169    ACPI_OBJECT_TYPE8       EntryType;
170    ACPI_INTEGER            TempVal;
171
172
173    FUNCTION_TRACE ("ExResolveNodeToValue");
174
175
176    /*
177     * The stack pointer points to a ACPI_NAMESPACE_NODE (Node).  Get the
178     * object that is attached to the Node.
179     */
180    Node      = *StackPtr;
181    ValDesc   = AcpiNsGetAttachedObject (Node);
182    EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
183
184    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p ValDesc=%p Type=%X\n",
185         Node, ValDesc, EntryType));
186
187
188    /*
189     * Several object types require no further processing:
190     * 1) Devices rarely have an attached object, return the Node
191     * 2) Method locals and arguments have a pseudo-Node
192     */
193    if (EntryType == ACPI_TYPE_DEVICE ||
194        (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
195    {
196        return_ACPI_STATUS (AE_OK);
197    }
198
199    if (!ValDesc)
200    {
201        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n",
202            Node));
203        return_ACPI_STATUS (AE_AML_NO_OPERAND);
204    }
205
206    /*
207     * Action is based on the type of the Node, which indicates the type
208     * of the attached object or pointer
209     */
210    switch (EntryType)
211    {
212
213    case ACPI_TYPE_PACKAGE:
214
215        if (ACPI_TYPE_PACKAGE != ValDesc->Common.Type)
216        {
217            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a package, type %X\n",
218                ValDesc->Common.Type));
219            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
220        }
221
222        /* Return an additional reference to the object */
223
224        ObjDesc = ValDesc;
225        AcpiUtAddReference (ObjDesc);
226        break;
227
228
229    case ACPI_TYPE_BUFFER:
230
231        if (ACPI_TYPE_BUFFER != ValDesc->Common.Type)
232        {
233            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a buffer, type %X\n",
234                ValDesc->Common.Type));
235            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
236        }
237
238        /* Return an additional reference to the object */
239
240        ObjDesc = ValDesc;
241        AcpiUtAddReference (ObjDesc);
242        break;
243
244
245    case ACPI_TYPE_STRING:
246
247        if (ACPI_TYPE_STRING != ValDesc->Common.Type)
248        {
249            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a string, type %X\n",
250                ValDesc->Common.Type));
251            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
252        }
253
254        /* Return an additional reference to the object */
255
256        ObjDesc = ValDesc;
257        AcpiUtAddReference (ObjDesc);
258        break;
259
260
261    case ACPI_TYPE_INTEGER:
262
263        if (ACPI_TYPE_INTEGER != ValDesc->Common.Type)
264        {
265            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Number, type %X\n",
266                ValDesc->Common.Type));
267            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
268        }
269
270        /* Return an additional reference to the object */
271
272        ObjDesc = ValDesc;
273        AcpiUtAddReference (ObjDesc);
274        break;
275
276
277    case ACPI_TYPE_BUFFER_FIELD:
278    case INTERNAL_TYPE_REGION_FIELD:
279    case INTERNAL_TYPE_BANK_FIELD:
280    case INTERNAL_TYPE_INDEX_FIELD:
281
282        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p ValDesc=%p Type=%X\n",
283            Node, ValDesc, EntryType));
284
285        Status = AcpiExReadDataFromField (ValDesc, &ObjDesc);
286        break;
287
288
289    /*
290     * For these objects, just return the object attached to the Node
291     */
292    case ACPI_TYPE_MUTEX:
293    case ACPI_TYPE_METHOD:
294    case ACPI_TYPE_POWER:
295    case ACPI_TYPE_PROCESSOR:
296    case ACPI_TYPE_THERMAL:
297    case ACPI_TYPE_EVENT:
298    case ACPI_TYPE_REGION:
299
300        /* Return an additional reference to the object */
301
302        ObjDesc = ValDesc;
303        AcpiUtAddReference (ObjDesc);
304        break;
305
306
307    /* TYPE_Any is untyped, and thus there is no object associated with it */
308
309    case ACPI_TYPE_ANY:
310
311        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n",
312            Node));
313
314        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);  /* Cannot be AE_TYPE */
315        break;
316
317
318    /*
319     * The only named references allowed are named constants
320     *   e.g. -- Name (\OSFL, Ones)
321     */
322    case INTERNAL_TYPE_REFERENCE:
323
324        switch (ValDesc->Reference.Opcode)
325        {
326
327        case AML_ZERO_OP:
328
329            TempVal = 0;
330            break;
331
332        case AML_ONE_OP:
333
334            TempVal = 1;
335            break;
336
337        case AML_ONES_OP:
338
339            TempVal = ACPI_INTEGER_MAX;
340            break;
341
342        default:
343
344            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported reference opcode %X\n",
345                ValDesc->Reference.Opcode));
346
347            return_ACPI_STATUS (AE_AML_BAD_OPCODE);
348        }
349
350        /* Create object for result */
351
352        ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
353        if (!ObjDesc)
354        {
355            return_ACPI_STATUS (AE_NO_MEMORY);
356        }
357
358        ObjDesc->Integer.Value = TempVal;
359
360        /* Truncate value if we are executing from a 32-bit ACPI table */
361
362        AcpiExTruncateFor32bitTable (ObjDesc, WalkState);
363        break;
364
365
366    /* Default case is for unknown types */
367
368    default:
369
370        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n",
371            Node, EntryType));
372
373        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
374
375    } /* switch (EntryType) */
376
377
378    /* Put the object descriptor on the stack */
379
380    *StackPtr = (void *) ObjDesc;
381    return_ACPI_STATUS (Status);
382}
383
384
385