exresnte.c revision 100966
1 2/****************************************************************************** 3 * 4 * Module Name: exresnte - AML Interpreter object resolution 5 * $Revision: 57 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2002, 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 "acdispat.h" 123#include "acinterp.h" 124#include "acnamesp.h" 125 126 127#define _COMPONENT ACPI_EXECUTER 128 ACPI_MODULE_NAME ("exresnte") 129 130 131/******************************************************************************* 132 * 133 * FUNCTION: AcpiExResolveNodeToValue 134 * 135 * PARAMETERS: ObjectPtr - Pointer to a location that contains 136 * a pointer to a NS node, and will receive a 137 * pointer to the resolved object. 138 * WalkState - Current state. Valid only if executing AML 139 * code. NULL if simply resolving an object 140 * 141 * RETURN: Status 142 * 143 * DESCRIPTION: Resolve a Namespace node to a valued object 144 * 145 * Note: for some of the data types, the pointer attached to the Node 146 * can be either a pointer to an actual internal object or a pointer into the 147 * AML stream itself. These types are currently: 148 * 149 * ACPI_TYPE_INTEGER 150 * ACPI_TYPE_STRING 151 * ACPI_TYPE_BUFFER 152 * ACPI_TYPE_MUTEX 153 * ACPI_TYPE_PACKAGE 154 * 155 ******************************************************************************/ 156 157ACPI_STATUS 158AcpiExResolveNodeToValue ( 159 ACPI_NAMESPACE_NODE **ObjectPtr, 160 ACPI_WALK_STATE *WalkState) 161 162{ 163 ACPI_STATUS Status = AE_OK; 164 ACPI_OPERAND_OBJECT *SourceDesc; 165 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 166 ACPI_NAMESPACE_NODE *Node; 167 ACPI_OBJECT_TYPE EntryType; 168 169 170 ACPI_FUNCTION_TRACE ("ExResolveNodeToValue"); 171 172 173 /* 174 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the 175 * object that is attached to the Node. 176 */ 177 Node = *ObjectPtr; 178 SourceDesc = AcpiNsGetAttachedObject (Node); 179 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 180 181 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p Type=%X\n", 182 Node, SourceDesc, EntryType)); 183 184 /* 185 * Several object types require no further processing: 186 * 1) Devices rarely have an attached object, return the Node 187 * 2) Method locals and arguments have a pseudo-Node 188 */ 189 if (EntryType == ACPI_TYPE_DEVICE || 190 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 191 { 192 return_ACPI_STATUS (AE_OK); 193 } 194 195 if (!SourceDesc) 196 { 197 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n", 198 Node)); 199 return_ACPI_STATUS (AE_AML_NO_OPERAND); 200 } 201 202 /* 203 * Action is based on the type of the Node, which indicates the type 204 * of the attached object or pointer 205 */ 206 switch (EntryType) 207 { 208 case ACPI_TYPE_PACKAGE: 209 210 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_PACKAGE) 211 { 212 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n", 213 AcpiUtGetObjectTypeName (SourceDesc))); 214 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 215 } 216 217 Status = AcpiDsGetPackageArguments (SourceDesc); 218 if (ACPI_SUCCESS (Status)) 219 { 220 /* Return an additional reference to the object */ 221 222 ObjDesc = SourceDesc; 223 AcpiUtAddReference (ObjDesc); 224 } 225 break; 226 227 228 case ACPI_TYPE_BUFFER: 229 230 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER) 231 { 232 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n", 233 AcpiUtGetObjectTypeName (SourceDesc))); 234 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 235 } 236 237 Status = AcpiDsGetBufferArguments (SourceDesc); 238 if (ACPI_SUCCESS (Status)) 239 { 240 /* Return an additional reference to the object */ 241 242 ObjDesc = SourceDesc; 243 AcpiUtAddReference (ObjDesc); 244 } 245 break; 246 247 248 case ACPI_TYPE_STRING: 249 250 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING) 251 { 252 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n", 253 AcpiUtGetObjectTypeName (SourceDesc))); 254 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 255 } 256 257 /* Return an additional reference to the object */ 258 259 ObjDesc = SourceDesc; 260 AcpiUtAddReference (ObjDesc); 261 break; 262 263 264 case ACPI_TYPE_INTEGER: 265 266 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER) 267 { 268 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n", 269 AcpiUtGetObjectTypeName (SourceDesc))); 270 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 271 } 272 273 /* Return an additional reference to the object */ 274 275 ObjDesc = SourceDesc; 276 AcpiUtAddReference (ObjDesc); 277 break; 278 279 280 case ACPI_TYPE_BUFFER_FIELD: 281 case INTERNAL_TYPE_REGION_FIELD: 282 case INTERNAL_TYPE_BANK_FIELD: 283 case INTERNAL_TYPE_INDEX_FIELD: 284 285 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n", 286 Node, SourceDesc, EntryType)); 287 288 Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); 289 break; 290 291 /* 292 * For these objects, just return the object attached to the Node 293 */ 294 case ACPI_TYPE_MUTEX: 295 case ACPI_TYPE_METHOD: 296 case ACPI_TYPE_POWER: 297 case ACPI_TYPE_PROCESSOR: 298 case ACPI_TYPE_THERMAL: 299 case ACPI_TYPE_EVENT: 300 case ACPI_TYPE_REGION: 301 302 /* Return an additional reference to the object */ 303 304 ObjDesc = SourceDesc; 305 AcpiUtAddReference (ObjDesc); 306 break; 307 308 309 /* TYPE_Any is untyped, and thus there is no object associated with it */ 310 311 case ACPI_TYPE_ANY: 312 313 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n", 314 Node)); 315 316 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 317 318 319 case INTERNAL_TYPE_REFERENCE: 320 321 /* No named references are allowed here */ 322 323 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported Reference opcode %X\n", 324 SourceDesc->Reference.Opcode)); 325 326 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 327 328 329 /* Default case is for unknown types */ 330 331 default: 332 333 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n", 334 Node, EntryType)); 335 336 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 337 338 } /* switch (EntryType) */ 339 340 341 /* Put the object descriptor on the stack */ 342 343 *ObjectPtr = (void *) ObjDesc; 344 return_ACPI_STATUS (Status); 345} 346 347 348