exresnte.c revision 114237
1145519Sdarrenr 2145510Sdarrenr/****************************************************************************** 3145510Sdarrenr * 4145510Sdarrenr * Module Name: exresnte - AML Interpreter object resolution 5145510Sdarrenr * $Revision: 62 $ 6145510Sdarrenr * 7145510Sdarrenr *****************************************************************************/ 8145510Sdarrenr 9145510Sdarrenr/****************************************************************************** 10145510Sdarrenr * 11145510Sdarrenr * 1. Copyright Notice 12145510Sdarrenr * 13145510Sdarrenr * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp. 14145510Sdarrenr * All rights reserved. 15145510Sdarrenr * 16145510Sdarrenr * 2. License 17145510Sdarrenr * 18145510Sdarrenr * 2.1. This is your license from Intel Corp. under its intellectual property 19145510Sdarrenr * rights. You may have additional license terms from the party that provided 20145510Sdarrenr * you this software, covering your right to use that party's intellectual 21145510Sdarrenr * property rights. 22145510Sdarrenr * 23145510Sdarrenr * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24145510Sdarrenr * copy of the source code appearing in this file ("Covered Code") an 25145510Sdarrenr * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26145510Sdarrenr * base code distributed originally by Intel ("Original Intel Code") to copy, 27145510Sdarrenr * make derivatives, distribute, use and display any portion of the Covered 28145510Sdarrenr * Code in any form, with the right to sublicense such rights; and 29145510Sdarrenr * 30145510Sdarrenr * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31145510Sdarrenr * license (with the right to sublicense), under only those claims of Intel 32145510Sdarrenr * patents that are infringed by the Original Intel Code, to make, use, sell, 33145510Sdarrenr * offer to sell, and import the Covered Code and derivative works thereof 34145510Sdarrenr * solely to the minimum extent necessary to exercise the above copyright 35145510Sdarrenr * license, and in no event shall the patent license extend to any additions 36145510Sdarrenr * to or modifications of the Original Intel Code. No other license or right 37145510Sdarrenr * is granted directly or by implication, estoppel or otherwise; 38145510Sdarrenr * 39145510Sdarrenr * The above copyright and patent license is granted only if the following 40145510Sdarrenr * conditions are met: 41145510Sdarrenr * 42145510Sdarrenr * 3. Conditions 43145510Sdarrenr * 44145510Sdarrenr * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45145510Sdarrenr * Redistribution of source code of any substantial portion of the Covered 46145510Sdarrenr * Code or modification with rights to further distribute source must include 47145510Sdarrenr * the above Copyright Notice, the above License, this list of Conditions, 48145510Sdarrenr * and the following Disclaimer and Export Compliance provision. In addition, 49145510Sdarrenr * Licensee must cause all Covered Code to which Licensee contributes to 50145510Sdarrenr * contain a file documenting the changes Licensee made to create that Covered 51145510Sdarrenr * Code and the date of any change. Licensee must include in that file the 52145510Sdarrenr * documentation of any changes made by any predecessor Licensee. Licensee 53145510Sdarrenr * must include a prominent statement that the modification is derived, 54145510Sdarrenr * directly or indirectly, from Original Intel Code. 55145510Sdarrenr * 56145510Sdarrenr * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57145510Sdarrenr * Redistribution of source code of any substantial portion of the Covered 58145510Sdarrenr * Code or modification without rights to further distribute source must 59145510Sdarrenr * include the following Disclaimer and Export Compliance provision in the 60145510Sdarrenr * 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 156ACPI_STATUS 157AcpiExResolveNodeToValue ( 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 { 185 /* There is always exactly one level of indirection */ 186 187 Node = (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) Devices rarely have an attached object, return the Node 196 * 2) Method locals and arguments have a pseudo-Node 197 */ 198 if (EntryType == ACPI_TYPE_DEVICE || 199 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 200 { 201 return_ACPI_STATUS (AE_OK); 202 } 203 204 if (!SourceDesc) 205 { 206 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n", 207 Node)); 208 return_ACPI_STATUS (AE_AML_NO_OPERAND); 209 } 210 211 /* 212 * Action is based on the type of the Node, which indicates the type 213 * of the attached object or pointer 214 */ 215 switch (EntryType) 216 { 217 case ACPI_TYPE_PACKAGE: 218 219 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_PACKAGE) 220 { 221 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n", 222 AcpiUtGetObjectTypeName (SourceDesc))); 223 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 224 } 225 226 Status = AcpiDsGetPackageArguments (SourceDesc); 227 if (ACPI_SUCCESS (Status)) 228 { 229 /* Return an additional reference to the object */ 230 231 ObjDesc = SourceDesc; 232 AcpiUtAddReference (ObjDesc); 233 } 234 break; 235 236 237 case ACPI_TYPE_BUFFER: 238 239 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER) 240 { 241 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n", 242 AcpiUtGetObjectTypeName (SourceDesc))); 243 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 244 } 245 246 Status = AcpiDsGetBufferArguments (SourceDesc); 247 if (ACPI_SUCCESS (Status)) 248 { 249 /* Return an additional reference to the object */ 250 251 ObjDesc = SourceDesc; 252 AcpiUtAddReference (ObjDesc); 253 } 254 break; 255 256 257 case ACPI_TYPE_STRING: 258 259 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING) 260 { 261 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n", 262 AcpiUtGetObjectTypeName (SourceDesc))); 263 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 264 } 265 266 /* Return an additional reference to the object */ 267 268 ObjDesc = SourceDesc; 269 AcpiUtAddReference (ObjDesc); 270 break; 271 272 273 case ACPI_TYPE_INTEGER: 274 275 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER) 276 { 277 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n", 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; 287 288 289 case ACPI_TYPE_BUFFER_FIELD: 290 case ACPI_TYPE_LOCAL_REGION_FIELD: 291 case ACPI_TYPE_LOCAL_BANK_FIELD: 292 case ACPI_TYPE_LOCAL_INDEX_FIELD: 293 294 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n", 295 Node, SourceDesc, EntryType)); 296 297 Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); 298 break; 299 300 /* 301 * For these objects, just return the object attached to the Node 302 */ 303 case ACPI_TYPE_MUTEX: 304 case ACPI_TYPE_METHOD: 305 case ACPI_TYPE_POWER: 306 case ACPI_TYPE_PROCESSOR: 307 case ACPI_TYPE_THERMAL: 308 case ACPI_TYPE_EVENT: 309 case ACPI_TYPE_REGION: 310 311 /* Return an additional reference to the object */ 312 313 ObjDesc = SourceDesc; 314 AcpiUtAddReference (ObjDesc); 315 break; 316 317 318 /* TYPE_ANY is untyped, and thus there is no object associated with it */ 319 320 case ACPI_TYPE_ANY: 321 322 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n", 323 Node)); 324 325 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 326 327 328 case ACPI_TYPE_LOCAL_REFERENCE: 329 330 /* No named references are allowed here */ 331 332 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported Reference opcode %X\n", 333 SourceDesc->Reference.Opcode)); 334 335 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 336 337 338 /* Default case is for unknown types */ 339 340 default: 341 342 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n", 343 Node, EntryType)); 344 345 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 346 347 } /* switch (EntryType) */ 348 349 350 /* Put the object descriptor on the stack */ 351 352 *ObjectPtr = (void *) ObjDesc; 353 return_ACPI_STATUS (Status); 354} 355 356 357