1 /****************************************************************************** 2 * 3 * Module Name: psscope - Parser scope stack management routines 4 * $Revision: 1.48 $ 5 * 6 *****************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2008, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 118 #include "acpi.h" 119 #include "acparser.h" 120 121 #define _COMPONENT ACPI_PARSER 122 ACPI_MODULE_NAME ("psscope") 123 124 125 /******************************************************************************* 126 * 127 * FUNCTION: AcpiPsGetParentScope 128 * 129 * PARAMETERS: ParserState - Current parser state object 130 * 131 * RETURN: Pointer to an Op object 132 * 133 * DESCRIPTION: Get parent of current op being parsed 134 * 135 ******************************************************************************/ 136 137 ACPI_PARSE_OBJECT * 138 AcpiPsGetParentScope ( 139 ACPI_PARSE_STATE *ParserState) 140 { 141 142 return (ParserState->Scope->ParseScope.Op); 143 } 144 145 146 /******************************************************************************* 147 * 148 * FUNCTION: AcpiPsHasCompletedScope 149 * 150 * PARAMETERS: ParserState - Current parser state object 151 * 152 * RETURN: Boolean, TRUE = scope completed. 153 * 154 * DESCRIPTION: Is parsing of current argument complete? Determined by 155 * 1) AML pointer is at or beyond the end of the scope 156 * 2) The scope argument count has reached zero. 157 * 158 ******************************************************************************/ 159 160 BOOLEAN 161 AcpiPsHasCompletedScope ( 162 ACPI_PARSE_STATE *ParserState) 163 { 164 165 return ((BOOLEAN) 166 ((ParserState->Aml >= ParserState->Scope->ParseScope.ArgEnd || 167 !ParserState->Scope->ParseScope.ArgCount))); 168 } 169 170 171 /******************************************************************************* 172 * 173 * FUNCTION: AcpiPsInitScope 174 * 175 * PARAMETERS: ParserState - Current parser state object 176 * Root - the Root Node of this new scope 177 * 178 * RETURN: Status 179 * 180 * DESCRIPTION: Allocate and init a new scope object 181 * 182 ******************************************************************************/ 183 184 ACPI_STATUS 185 AcpiPsInitScope ( 186 ACPI_PARSE_STATE *ParserState, 187 ACPI_PARSE_OBJECT *RootOp) 188 { 189 ACPI_GENERIC_STATE *Scope; 190 191 192 ACPI_FUNCTION_TRACE_PTR (PsInitScope, RootOp); 193 194 195 Scope = AcpiUtCreateGenericState (); 196 if (!Scope) 197 { 198 return_ACPI_STATUS (AE_NO_MEMORY); 199 } 200 201 Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RPSCOPE; 202 Scope->ParseScope.Op = RootOp; 203 Scope->ParseScope.ArgCount = ACPI_VAR_ARGS; 204 Scope->ParseScope.ArgEnd = ParserState->AmlEnd; 205 Scope->ParseScope.PkgEnd = ParserState->AmlEnd; 206 207 ParserState->Scope = Scope; 208 ParserState->StartOp = RootOp; 209 210 return_ACPI_STATUS (AE_OK); 211 } 212 213 214 /******************************************************************************* 215 * 216 * FUNCTION: AcpiPsPushScope 217 * 218 * PARAMETERS: ParserState - Current parser state object 219 * Op - Current op to be pushed 220 * RemainingArgs - List of args remaining 221 * ArgCount - Fixed or variable number of args 222 * 223 * RETURN: Status 224 * 225 * DESCRIPTION: Push current op to begin parsing its argument 226 * 227 ******************************************************************************/ 228 229 ACPI_STATUS 230 AcpiPsPushScope ( 231 ACPI_PARSE_STATE *ParserState, 232 ACPI_PARSE_OBJECT *Op, 233 UINT32 RemainingArgs, 234 UINT32 ArgCount) 235 { 236 ACPI_GENERIC_STATE *Scope; 237 238 239 ACPI_FUNCTION_TRACE_PTR (PsPushScope, Op); 240 241 242 Scope = AcpiUtCreateGenericState (); 243 if (!Scope) 244 { 245 return_ACPI_STATUS (AE_NO_MEMORY); 246 } 247 248 Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PSCOPE; 249 Scope->ParseScope.Op = Op; 250 Scope->ParseScope.ArgList = RemainingArgs; 251 Scope->ParseScope.ArgCount = ArgCount; 252 Scope->ParseScope.PkgEnd = ParserState->PkgEnd; 253 254 /* Push onto scope stack */ 255 256 AcpiUtPushGenericState (&ParserState->Scope, Scope); 257 258 if (ArgCount == ACPI_VAR_ARGS) 259 { 260 /* Multiple arguments */ 261 262 Scope->ParseScope.ArgEnd = ParserState->PkgEnd; 263 } 264 else 265 { 266 /* Single argument */ 267 268 Scope->ParseScope.ArgEnd = ACPI_TO_POINTER (ACPI_MAX_PTR); 269 } 270 271 return_ACPI_STATUS (AE_OK); 272 } 273 274 275 /******************************************************************************* 276 * 277 * FUNCTION: AcpiPsPopScope 278 * 279 * PARAMETERS: ParserState - Current parser state object 280 * Op - Where the popped op is returned 281 * ArgList - Where the popped "next argument" is 282 * returned 283 * ArgCount - Count of objects in ArgList 284 * 285 * RETURN: Status 286 * 287 * DESCRIPTION: Return to parsing a previous op 288 * 289 ******************************************************************************/ 290 291 void 292 AcpiPsPopScope ( 293 ACPI_PARSE_STATE *ParserState, 294 ACPI_PARSE_OBJECT **Op, 295 UINT32 *ArgList, 296 UINT32 *ArgCount) 297 { 298 ACPI_GENERIC_STATE *Scope = ParserState->Scope; 299 300 301 ACPI_FUNCTION_TRACE (PsPopScope); 302 303 304 /* Only pop the scope if there is in fact a next scope */ 305 306 if (Scope->Common.Next) 307 { 308 Scope = AcpiUtPopGenericState (&ParserState->Scope); 309 310 /* Return to parsing previous op */ 311 312 *Op = Scope->ParseScope.Op; 313 *ArgList = Scope->ParseScope.ArgList; 314 *ArgCount = Scope->ParseScope.ArgCount; 315 ParserState->PkgEnd = Scope->ParseScope.PkgEnd; 316 317 /* All done with this scope state structure */ 318 319 AcpiUtDeleteGenericState (Scope); 320 } 321 else 322 { 323 /* Empty parse stack, prepare to fetch next opcode */ 324 325 *Op = NULL; 326 *ArgList = 0; 327 *ArgCount = 0; 328 } 329 330 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 331 "Popped Op %p Args %X\n", *Op, *ArgCount)); 332 return_VOID; 333 } 334 335 336 /******************************************************************************* 337 * 338 * FUNCTION: AcpiPsCleanupScope 339 * 340 * PARAMETERS: ParserState - Current parser state object 341 * 342 * RETURN: None 343 * 344 * DESCRIPTION: Destroy available list, remaining stack levels, and return 345 * root scope 346 * 347 ******************************************************************************/ 348 349 void 350 AcpiPsCleanupScope ( 351 ACPI_PARSE_STATE *ParserState) 352 { 353 ACPI_GENERIC_STATE *Scope; 354 355 356 ACPI_FUNCTION_TRACE_PTR (PsCleanupScope, ParserState); 357 358 359 if (!ParserState) 360 { 361 return_VOID; 362 } 363 364 /* Delete anything on the scope stack */ 365 366 while (ParserState->Scope) 367 { 368 Scope = AcpiUtPopGenericState (&ParserState->Scope); 369 AcpiUtDeleteGenericState (Scope); 370 } 371 372 return_VOID; 373 } 374 375