1 /****************************************************************************** 2 * 3 * Module Name: exresnte - AML Interpreter object resolution 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2013, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 #define __EXRESNTE_C__ 117 118 #include "acpi.h" 119 #include "accommon.h" 120 #include "acdispat.h" 121 #include "acinterp.h" 122 #include "acnamesp.h" 123 124 125 #define _COMPONENT ACPI_EXECUTER 126 ACPI_MODULE_NAME ("exresnte") 127 128 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiExResolveNodeToValue 132 * 133 * PARAMETERS: ObjectPtr - Pointer to a location that contains 134 * a pointer to a NS node, and will receive a 135 * pointer to the resolved object. 136 * WalkState - Current state. Valid only if executing AML 137 * code. NULL if simply resolving an object 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Resolve a Namespace node to a valued object 142 * 143 * Note: for some of the data types, the pointer attached to the Node 144 * can be either a pointer to an actual internal object or a pointer into the 145 * AML stream itself. These types are currently: 146 * 147 * ACPI_TYPE_INTEGER 148 * ACPI_TYPE_STRING 149 * ACPI_TYPE_BUFFER 150 * ACPI_TYPE_MUTEX 151 * ACPI_TYPE_PACKAGE 152 * 153 ******************************************************************************/ 154 155 ACPI_STATUS 156 AcpiExResolveNodeToValue ( 157 ACPI_NAMESPACE_NODE **ObjectPtr, 158 ACPI_WALK_STATE *WalkState) 159 160 { 161 ACPI_STATUS Status = AE_OK; 162 ACPI_OPERAND_OBJECT *SourceDesc; 163 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 164 ACPI_NAMESPACE_NODE *Node; 165 ACPI_OBJECT_TYPE EntryType; 166 167 168 ACPI_FUNCTION_TRACE (ExResolveNodeToValue); 169 170 171 /* 172 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the 173 * object that is attached to the Node. 174 */ 175 Node = *ObjectPtr; 176 SourceDesc = AcpiNsGetAttachedObject (Node); 177 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 178 179 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n", 180 Node, SourceDesc, AcpiUtGetTypeName (EntryType))); 181 182 if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) || 183 (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS)) 184 { 185 /* There is always exactly one level of indirection */ 186 187 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object); 188 SourceDesc = AcpiNsGetAttachedObject (Node); 189 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 190 *ObjectPtr = Node; 191 } 192 193 /* 194 * Several object types require no further processing: 195 * 1) Device/Thermal objects don't have a "real" subobject, return the Node 196 * 2) Method locals and arguments have a pseudo-Node 197 * 3) 10/2007: Added method type to assist with Package construction. 198 */ 199 if ((EntryType == ACPI_TYPE_DEVICE) || 200 (EntryType == ACPI_TYPE_THERMAL) || 201 (EntryType == ACPI_TYPE_METHOD) || 202 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 203 { 204 return_ACPI_STATUS (AE_OK); 205 } 206 207 if (!SourceDesc) 208 { 209 ACPI_ERROR ((AE_INFO, "No object attached to node %p", 210 Node)); 211 return_ACPI_STATUS (AE_AML_NO_OPERAND); 212 } 213 214 /* 215 * Action is based on the type of the Node, which indicates the type 216 * of the attached object or pointer 217 */ 218 switch (EntryType) 219 { 220 case ACPI_TYPE_PACKAGE: 221 222 if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE) 223 { 224 ACPI_ERROR ((AE_INFO, "Object not a Package, type %s", 225 AcpiUtGetObjectTypeName (SourceDesc))); 226 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 227 } 228 229 Status = AcpiDsGetPackageArguments (SourceDesc); 230 if (ACPI_SUCCESS (Status)) 231 { 232 /* Return an additional reference to the object */ 233 234 ObjDesc = SourceDesc; 235 AcpiUtAddReference (ObjDesc); 236 } 237 break; 238 239 case ACPI_TYPE_BUFFER: 240 241 if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) 242 { 243 ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s", 244 AcpiUtGetObjectTypeName (SourceDesc))); 245 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 246 } 247 248 Status = AcpiDsGetBufferArguments (SourceDesc); 249 if (ACPI_SUCCESS (Status)) 250 { 251 /* Return an additional reference to the object */ 252 253 ObjDesc = SourceDesc; 254 AcpiUtAddReference (ObjDesc); 255 } 256 break; 257 258 case ACPI_TYPE_STRING: 259 260 if (SourceDesc->Common.Type != ACPI_TYPE_STRING) 261 { 262 ACPI_ERROR ((AE_INFO, "Object not a String, type %s", 263 AcpiUtGetObjectTypeName (SourceDesc))); 264 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 265 } 266 267 /* Return an additional reference to the object */ 268 269 ObjDesc = SourceDesc; 270 AcpiUtAddReference (ObjDesc); 271 break; 272 273 case ACPI_TYPE_INTEGER: 274 275 if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) 276 { 277 ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s", 278 AcpiUtGetObjectTypeName (SourceDesc))); 279 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 280 } 281 282 /* Return an additional reference to the object */ 283 284 ObjDesc = SourceDesc; 285 AcpiUtAddReference (ObjDesc); 286 break; 287 288 case ACPI_TYPE_BUFFER_FIELD: 289 case ACPI_TYPE_LOCAL_REGION_FIELD: 290 case ACPI_TYPE_LOCAL_BANK_FIELD: 291 case ACPI_TYPE_LOCAL_INDEX_FIELD: 292 293 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 294 "FieldRead Node=%p SourceDesc=%p Type=%X\n", 295 Node, SourceDesc, EntryType)); 296 297 Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); 298 break; 299 300 /* For these objects, just return the object attached to the Node */ 301 302 case ACPI_TYPE_MUTEX: 303 case ACPI_TYPE_POWER: 304 case ACPI_TYPE_PROCESSOR: 305 case ACPI_TYPE_EVENT: 306 case ACPI_TYPE_REGION: 307 308 /* Return an additional reference to the object */ 309 310 ObjDesc = SourceDesc; 311 AcpiUtAddReference (ObjDesc); 312 break; 313 314 /* TYPE_ANY is untyped, and thus there is no object associated with it */ 315 316 case ACPI_TYPE_ANY: 317 318 ACPI_ERROR ((AE_INFO, 319 "Untyped entry %p, no attached object!", Node)); 320 321 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 322 323 case ACPI_TYPE_LOCAL_REFERENCE: 324 325 switch (SourceDesc->Reference.Class) 326 { 327 case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */ 328 case ACPI_REFCLASS_REFOF: 329 case ACPI_REFCLASS_INDEX: 330 331 /* Return an additional reference to the object */ 332 333 ObjDesc = SourceDesc; 334 AcpiUtAddReference (ObjDesc); 335 break; 336 337 default: 338 339 /* No named references are allowed here */ 340 341 ACPI_ERROR ((AE_INFO, 342 "Unsupported Reference type 0x%X", 343 SourceDesc->Reference.Class)); 344 345 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 346 } 347 break; 348 349 default: 350 351 /* Default case is for unknown types */ 352 353 ACPI_ERROR ((AE_INFO, 354 "Node %p - Unknown object type 0x%X", 355 Node, EntryType)); 356 357 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 358 359 } /* switch (EntryType) */ 360 361 362 /* Return the object descriptor */ 363 364 *ObjectPtr = (void *) ObjDesc; 365 return_ACPI_STATUS (Status); 366 } 367