psutils.c revision 138287
1/****************************************************************************** 2 * 3 * Module Name: psutils - Parser miscellaneous utilities (Parser only) 4 * $Revision: 58 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, 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#include "amlcode.h" 121#include "acnamesp.h" 122 123#define _COMPONENT ACPI_PARSER 124 ACPI_MODULE_NAME ("psutils") 125 126 127/******************************************************************************* 128 * 129 * FUNCTION: AcpiPsCreateScopeOp 130 * 131 * PARAMETERS: None 132 * 133 * RETURN: ScopeOp 134 * 135 * DESCRIPTION: Create a Scope and associated namepath op with the root name 136 * 137 ******************************************************************************/ 138 139ACPI_PARSE_OBJECT * 140AcpiPsCreateScopeOp ( 141 void) 142{ 143 ACPI_PARSE_OBJECT *ScopeOp; 144 145 146 ScopeOp = AcpiPsAllocOp (AML_SCOPE_OP); 147 if (!ScopeOp) 148 { 149 return (NULL); 150 } 151 152 153 ScopeOp->Named.Name = ACPI_ROOT_NAME; 154 return (ScopeOp); 155} 156 157 158/******************************************************************************* 159 * 160 * FUNCTION: AcpiPsInitOp 161 * 162 * PARAMETERS: Op - A newly allocated Op object 163 * Opcode - Opcode to store in the Op 164 * 165 * RETURN: Status 166 * 167 * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on 168 * opcode 169 * 170 ******************************************************************************/ 171 172void 173AcpiPsInitOp ( 174 ACPI_PARSE_OBJECT *Op, 175 UINT16 Opcode) 176{ 177 ACPI_FUNCTION_ENTRY (); 178 179 180 Op->Common.DataType = ACPI_DESC_TYPE_PARSER; 181 Op->Common.AmlOpcode = Opcode; 182 183 ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (Op->Common.AmlOpName, 184 (AcpiPsGetOpcodeInfo (Opcode))->Name, sizeof (Op->Common.AmlOpName))); 185} 186 187 188/******************************************************************************* 189 * 190 * FUNCTION: AcpiPsAllocOp 191 * 192 * PARAMETERS: Opcode - Opcode that will be stored in the new Op 193 * 194 * RETURN: Pointer to the new Op. 195 * 196 * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on 197 * opcode. A cache of opcodes is available for the pure 198 * GENERIC_OP, since this is by far the most commonly used. 199 * 200 ******************************************************************************/ 201 202ACPI_PARSE_OBJECT* 203AcpiPsAllocOp ( 204 UINT16 Opcode) 205{ 206 ACPI_PARSE_OBJECT *Op; 207 const ACPI_OPCODE_INFO *OpInfo; 208 UINT8 Flags = ACPI_PARSEOP_GENERIC; 209 210 211 ACPI_FUNCTION_ENTRY (); 212 213 214 OpInfo = AcpiPsGetOpcodeInfo (Opcode); 215 216 /* Determine type of ParseOp required */ 217 218 if (OpInfo->Flags & AML_DEFER) 219 { 220 Flags = ACPI_PARSEOP_DEFERRED; 221 } 222 else if (OpInfo->Flags & AML_NAMED) 223 { 224 Flags = ACPI_PARSEOP_NAMED; 225 } 226 else if (Opcode == AML_INT_BYTELIST_OP) 227 { 228 Flags = ACPI_PARSEOP_BYTELIST; 229 } 230 231 /* Allocate the minimum required size object */ 232 233 if (Flags == ACPI_PARSEOP_GENERIC) 234 { 235 /* The generic op (default) is by far the most common (16 to 1) */ 236 237 Op = AcpiUtAcquireFromCache (ACPI_MEM_LIST_PSNODE); 238 } 239 else 240 { 241 /* Extended parseop */ 242 243 Op = AcpiUtAcquireFromCache (ACPI_MEM_LIST_PSNODE_EXT); 244 } 245 246 /* Initialize the Op */ 247 248 if (Op) 249 { 250 AcpiPsInitOp (Op, Opcode); 251 Op->Common.Flags = Flags; 252 } 253 254 return (Op); 255} 256 257 258/******************************************************************************* 259 * 260 * FUNCTION: AcpiPsFreeOp 261 * 262 * PARAMETERS: Op - Op to be freed 263 * 264 * RETURN: None. 265 * 266 * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list 267 * or actually free it. 268 * 269 ******************************************************************************/ 270 271void 272AcpiPsFreeOp ( 273 ACPI_PARSE_OBJECT *Op) 274{ 275 ACPI_FUNCTION_NAME ("PsFreeOp"); 276 277 278 if (Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP) 279 { 280 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", Op)); 281 } 282 283 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC) 284 { 285 AcpiUtReleaseToCache (ACPI_MEM_LIST_PSNODE, Op); 286 } 287 else 288 { 289 AcpiUtReleaseToCache (ACPI_MEM_LIST_PSNODE_EXT, Op); 290 } 291} 292 293 294/******************************************************************************* 295 * 296 * FUNCTION: AcpiPsDeleteParseCache 297 * 298 * PARAMETERS: None 299 * 300 * RETURN: None 301 * 302 * DESCRIPTION: Free all objects that are on the parse cache list. 303 * 304 ******************************************************************************/ 305 306void 307AcpiPsDeleteParseCache ( 308 void) 309{ 310 ACPI_FUNCTION_TRACE ("PsDeleteParseCache"); 311 312 313 AcpiUtDeleteGenericCache (ACPI_MEM_LIST_PSNODE); 314 AcpiUtDeleteGenericCache (ACPI_MEM_LIST_PSNODE_EXT); 315 return_VOID; 316} 317 318 319/******************************************************************************* 320 * 321 * FUNCTION: Utility functions 322 * 323 * DESCRIPTION: Low level character and object functions 324 * 325 ******************************************************************************/ 326 327 328/* 329 * Is "c" a namestring lead character? 330 */ 331BOOLEAN 332AcpiPsIsLeadingChar ( 333 UINT32 c) 334{ 335 return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z'))); 336} 337 338 339/* 340 * Is "c" a namestring prefix character? 341 */ 342BOOLEAN 343AcpiPsIsPrefixChar ( 344 UINT32 c) 345{ 346 return ((BOOLEAN) (c == '\\' || c == '^')); 347} 348 349 350/* 351 * Get op's name (4-byte name segment) or 0 if unnamed 352 */ 353UINT32 354AcpiPsGetName ( 355 ACPI_PARSE_OBJECT *Op) 356{ 357 358 359 /* The "generic" object has no name associated with it */ 360 361 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC) 362 { 363 return (0); 364 } 365 366 /* Only the "Extended" parse objects have a name */ 367 368 return (Op->Named.Name); 369} 370 371 372/* 373 * Set op's name 374 */ 375void 376AcpiPsSetName ( 377 ACPI_PARSE_OBJECT *Op, 378 UINT32 name) 379{ 380 381 /* The "generic" object has no name associated with it */ 382 383 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC) 384 { 385 return; 386 } 387 388 Op->Named.Name = name; 389} 390 391