1 2 /****************************************************************************** 3 * 4 * Module Name: exresnte - AML Interpreter object resolution 5 * $Revision: 1.78 $ 6 * 7 *****************************************************************************/ 8 9 /****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2008, 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 "acdispat.h" 122 #include "acinterp.h" 123 #include "acnamesp.h" 124 125 126 #define _COMPONENT ACPI_EXECUTER 127 ACPI_MODULE_NAME ("exresnte") 128 129 130 /******************************************************************************* 131 * 132 * FUNCTION: AcpiExResolveNodeToValue 133 * 134 * PARAMETERS: ObjectPtr - Pointer to a location that contains 135 * a pointer to a NS node, and will receive a 136 * pointer to the resolved object. 137 * WalkState - Current state. Valid only if executing AML 138 * code. NULL if simply resolving an object 139 * 140 * RETURN: Status 141 * 142 * DESCRIPTION: Resolve a Namespace node to a valued object 143 * 144 * Note: for some of the data types, the pointer attached to the Node 145 * can be either a pointer to an actual internal object or a pointer into the 146 * AML stream itself. These types are currently: 147 * 148 * ACPI_TYPE_INTEGER 149 * ACPI_TYPE_STRING 150 * ACPI_TYPE_BUFFER 151 * ACPI_TYPE_MUTEX 152 * ACPI_TYPE_PACKAGE 153 * 154 ******************************************************************************/ 155 156 ACPI_STATUS 157 AcpiExResolveNodeToValue ( 158 ACPI_NAMESPACE_NODE **ObjectPtr, 159 ACPI_WALK_STATE *WalkState) 160 161 { 162 ACPI_STATUS Status = AE_OK; 163 ACPI_OPERAND_OBJECT *SourceDesc; 164 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 165 ACPI_NAMESPACE_NODE *Node; 166 ACPI_OBJECT_TYPE EntryType; 167 168 169 ACPI_FUNCTION_TRACE (ExResolveNodeToValue); 170 171 172 /* 173 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the 174 * object that is attached to the Node. 175 */ 176 Node = *ObjectPtr; 177 SourceDesc = AcpiNsGetAttachedObject (Node); 178 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 179 180 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n", 181 Node, SourceDesc, AcpiUtGetTypeName (EntryType))); 182 183 if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) || 184 (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS)) 185 { 186 /* There is always exactly one level of indirection */ 187 188 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object); 189 SourceDesc = AcpiNsGetAttachedObject (Node); 190 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 191 *ObjectPtr = Node; 192 } 193 194 /* 195 * Several object types require no further processing: 196 * 1) Device/Thermal objects don't have a "real" subobject, return the Node 197 * 2) Method locals and arguments have a pseudo-Node 198 * 3) 10/2007: Added method type to assist with Package construction. 199 */ 200 if ((EntryType == ACPI_TYPE_DEVICE) || 201 (EntryType == ACPI_TYPE_THERMAL) || 202 (EntryType == ACPI_TYPE_METHOD) || 203 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 204 { 205 return_ACPI_STATUS (AE_OK); 206 } 207 208 if (!SourceDesc) 209 { 210 ACPI_ERROR ((AE_INFO, "No object attached to node %p", 211 Node)); 212 return_ACPI_STATUS (AE_AML_NO_OPERAND); 213 } 214 215 /* 216 * Action is based on the type of the Node, which indicates the type 217 * of the attached object or pointer 218 */ 219 switch (EntryType) 220 { 221 case ACPI_TYPE_PACKAGE: 222 223 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_PACKAGE) 224 { 225 ACPI_ERROR ((AE_INFO, "Object not a Package, type %s", 226 AcpiUtGetObjectTypeName (SourceDesc))); 227 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 228 } 229 230 Status = AcpiDsGetPackageArguments (SourceDesc); 231 if (ACPI_SUCCESS (Status)) 232 { 233 /* Return an additional reference to the object */ 234 235 ObjDesc = SourceDesc; 236 AcpiUtAddReference (ObjDesc); 237 } 238 break; 239 240 241 case ACPI_TYPE_BUFFER: 242 243 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER) 244 { 245 ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s", 246 AcpiUtGetObjectTypeName (SourceDesc))); 247 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 248 } 249 250 Status = AcpiDsGetBufferArguments (SourceDesc); 251 if (ACPI_SUCCESS (Status)) 252 { 253 /* Return an additional reference to the object */ 254 255 ObjDesc = SourceDesc; 256 AcpiUtAddReference (ObjDesc); 257 } 258 break; 259 260 261 case ACPI_TYPE_STRING: 262 263 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING) 264 { 265 ACPI_ERROR ((AE_INFO, "Object not a String, type %s", 266 AcpiUtGetObjectTypeName (SourceDesc))); 267 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 268 } 269 270 /* Return an additional reference to the object */ 271 272 ObjDesc = SourceDesc; 273 AcpiUtAddReference (ObjDesc); 274 break; 275 276 277 case ACPI_TYPE_INTEGER: 278 279 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER) 280 { 281 ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s", 282 AcpiUtGetObjectTypeName (SourceDesc))); 283 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 284 } 285 286 /* Return an additional reference to the object */ 287 288 ObjDesc = SourceDesc; 289 AcpiUtAddReference (ObjDesc); 290 break; 291 292 293 case ACPI_TYPE_BUFFER_FIELD: 294 case ACPI_TYPE_LOCAL_REGION_FIELD: 295 case ACPI_TYPE_LOCAL_BANK_FIELD: 296 case ACPI_TYPE_LOCAL_INDEX_FIELD: 297 298 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 299 "FieldRead Node=%p SourceDesc=%p Type=%X\n", 300 Node, SourceDesc, EntryType)); 301 302 Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); 303 break; 304 305 /* For these objects, just return the object attached to the Node */ 306 307 case ACPI_TYPE_MUTEX: 308 case ACPI_TYPE_POWER: 309 case ACPI_TYPE_PROCESSOR: 310 case ACPI_TYPE_EVENT: 311 case ACPI_TYPE_REGION: 312 313 /* Return an additional reference to the object */ 314 315 ObjDesc = SourceDesc; 316 AcpiUtAddReference (ObjDesc); 317 break; 318 319 /* TYPE_ANY is untyped, and thus there is no object associated with it */ 320 321 case ACPI_TYPE_ANY: 322 323 ACPI_ERROR ((AE_INFO, 324 "Untyped entry %p, no attached object!", Node)); 325 326 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 327 328 329 case ACPI_TYPE_LOCAL_REFERENCE: 330 331 switch (SourceDesc->Reference.Class) 332 { 333 case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */ 334 case ACPI_REFCLASS_REFOF: 335 case ACPI_REFCLASS_INDEX: 336 337 /* Return an additional reference to the object */ 338 339 ObjDesc = SourceDesc; 340 AcpiUtAddReference (ObjDesc); 341 break; 342 343 default: 344 /* No named references are allowed here */ 345 346 ACPI_ERROR ((AE_INFO, 347 "Unsupported Reference type %X", 348 SourceDesc->Reference.Class)); 349 350 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 351 } 352 break; 353 354 355 default: 356 357 /* Default case is for unknown types */ 358 359 ACPI_ERROR ((AE_INFO, 360 "Node %p - Unknown object type %X", 361 Node, EntryType)); 362 363 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 364 365 } /* switch (EntryType) */ 366 367 368 /* Return the object descriptor */ 369 370 *ObjectPtr = (void *) ObjDesc; 371 return_ACPI_STATUS (Status); 372 } 373 374 375