1 /****************************************************************************** 2 * 3 * Module Name: dswload - Dispatcher first pass namespace load callbacks 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #include <acpi/acpi.h> 45 #include "accommon.h" 46 #include "acparser.h" 47 #include "amlcode.h" 48 #include "acdispat.h" 49 #include "acinterp.h" 50 #include "acnamesp.h" 51 52 #ifdef ACPI_ASL_COMPILER 53 #include "acdisasm.h" 54 #endif 55 56 #define _COMPONENT ACPI_DISPATCHER 57 ACPI_MODULE_NAME("dswload") 58 59 /******************************************************************************* 60 * 61 * FUNCTION: acpi_ds_init_callbacks 62 * 63 * PARAMETERS: walk_state - Current state of the parse tree walk 64 * pass_number - 1, 2, or 3 65 * 66 * RETURN: Status 67 * 68 * DESCRIPTION: Init walk state callbacks 69 * 70 ******************************************************************************/ 71 acpi_status 72 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number) 73 { 74 75 switch (pass_number) { 76 case 0: 77 78 /* Parse only - caller will setup callbacks */ 79 80 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | 81 ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE; 82 walk_state->descending_callback = NULL; 83 walk_state->ascending_callback = NULL; 84 break; 85 86 case 1: 87 88 /* Load pass 1 */ 89 90 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | 91 ACPI_PARSE_DELETE_TREE; 92 walk_state->descending_callback = acpi_ds_load1_begin_op; 93 walk_state->ascending_callback = acpi_ds_load1_end_op; 94 break; 95 96 case 2: 97 98 /* Load pass 2 */ 99 100 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | 101 ACPI_PARSE_DELETE_TREE; 102 walk_state->descending_callback = acpi_ds_load2_begin_op; 103 walk_state->ascending_callback = acpi_ds_load2_end_op; 104 break; 105 106 case 3: 107 108 /* Execution pass */ 109 110 #ifndef ACPI_NO_METHOD_EXECUTION 111 walk_state->parse_flags |= ACPI_PARSE_EXECUTE | 112 ACPI_PARSE_DELETE_TREE; 113 walk_state->descending_callback = acpi_ds_exec_begin_op; 114 walk_state->ascending_callback = acpi_ds_exec_end_op; 115 #endif 116 break; 117 118 default: 119 120 return (AE_BAD_PARAMETER); 121 } 122 123 return (AE_OK); 124 } 125 126 /******************************************************************************* 127 * 128 * FUNCTION: acpi_ds_load1_begin_op 129 * 130 * PARAMETERS: walk_state - Current state of the parse tree walk 131 * out_op - Where to return op if a new one is created 132 * 133 * RETURN: Status 134 * 135 * DESCRIPTION: Descending callback used during the loading of ACPI tables. 136 * 137 ******************************************************************************/ 138 139 acpi_status 140 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state, 141 union acpi_parse_object ** out_op) 142 { 143 union acpi_parse_object *op; 144 struct acpi_namespace_node *node; 145 acpi_status status; 146 acpi_object_type object_type; 147 char *path; 148 u32 flags; 149 150 ACPI_FUNCTION_TRACE(ds_load1_begin_op); 151 152 op = walk_state->op; 153 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, 154 walk_state)); 155 156 /* We are only interested in opcodes that have an associated name */ 157 158 if (op) { 159 if (!(walk_state->op_info->flags & AML_NAMED)) { 160 *out_op = op; 161 return_ACPI_STATUS(AE_OK); 162 } 163 164 /* Check if this object has already been installed in the namespace */ 165 166 if (op->common.node) { 167 *out_op = op; 168 return_ACPI_STATUS(AE_OK); 169 } 170 } 171 172 path = acpi_ps_get_next_namestring(&walk_state->parser_state); 173 174 /* Map the raw opcode into an internal object type */ 175 176 object_type = walk_state->op_info->object_type; 177 178 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 179 "State=%p Op=%p [%s]\n", walk_state, op, 180 acpi_ut_get_type_name(object_type))); 181 182 switch (walk_state->opcode) { 183 case AML_SCOPE_OP: 184 /* 185 * The target name of the Scope() operator must exist at this point so 186 * that we can actually open the scope to enter new names underneath it. 187 * Allow search-to-root for single namesegs. 188 */ 189 status = 190 acpi_ns_lookup(walk_state->scope_info, path, object_type, 191 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, 192 walk_state, &(node)); 193 #ifdef ACPI_ASL_COMPILER 194 if (status == AE_NOT_FOUND) { 195 /* 196 * Table disassembly: 197 * Target of Scope() not found. Generate an External for it, and 198 * insert the name into the namespace. 199 */ 200 acpi_dm_add_op_to_external_list(op, path, 201 ACPI_TYPE_DEVICE, 0, 0); 202 status = 203 acpi_ns_lookup(walk_state->scope_info, path, 204 object_type, ACPI_IMODE_LOAD_PASS1, 205 ACPI_NS_SEARCH_PARENT, walk_state, 206 &node); 207 } 208 #endif 209 if (ACPI_FAILURE(status)) { 210 ACPI_ERROR_NAMESPACE(path, status); 211 return_ACPI_STATUS(status); 212 } 213 214 /* 215 * Check to make sure that the target is 216 * one of the opcodes that actually opens a scope 217 */ 218 switch (node->type) { 219 case ACPI_TYPE_ANY: 220 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ 221 case ACPI_TYPE_DEVICE: 222 case ACPI_TYPE_POWER: 223 case ACPI_TYPE_PROCESSOR: 224 case ACPI_TYPE_THERMAL: 225 226 /* These are acceptable types */ 227 break; 228 229 case ACPI_TYPE_INTEGER: 230 case ACPI_TYPE_STRING: 231 case ACPI_TYPE_BUFFER: 232 /* 233 * These types we will allow, but we will change the type. 234 * This enables some existing code of the form: 235 * 236 * Name (DEB, 0) 237 * Scope (DEB) { ... } 238 * 239 * Note: silently change the type here. On the second pass, 240 * we will report a warning 241 */ 242 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 243 "Type override - [%4.4s] had invalid type (%s) " 244 "for Scope operator, changed to type ANY\n", 245 acpi_ut_get_node_name(node), 246 acpi_ut_get_type_name(node->type))); 247 248 node->type = ACPI_TYPE_ANY; 249 walk_state->scope_info->common.value = ACPI_TYPE_ANY; 250 break; 251 252 case ACPI_TYPE_METHOD: 253 /* 254 * Allow scope change to root during execution of module-level 255 * code. Root is typed METHOD during this time. 256 */ 257 if ((node == acpi_gbl_root_node) && 258 (walk_state-> 259 parse_flags & ACPI_PARSE_MODULE_LEVEL)) { 260 break; 261 } 262 263 /*lint -fallthrough */ 264 265 default: 266 267 /* All other types are an error */ 268 269 ACPI_ERROR((AE_INFO, 270 "Invalid type (%s) for target of " 271 "Scope operator [%4.4s] (Cannot override)", 272 acpi_ut_get_type_name(node->type), 273 acpi_ut_get_node_name(node))); 274 275 return_ACPI_STATUS(AE_AML_OPERAND_TYPE); 276 } 277 break; 278 279 default: 280 /* 281 * For all other named opcodes, we will enter the name into 282 * the namespace. 283 * 284 * Setup the search flags. 285 * Since we are entering a name into the namespace, we do not want to 286 * enable the search-to-root upsearch. 287 * 288 * There are only two conditions where it is acceptable that the name 289 * already exists: 290 * 1) the Scope() operator can reopen a scoping object that was 291 * previously defined (Scope, Method, Device, etc.) 292 * 2) Whenever we are parsing a deferred opcode (op_region, Buffer, 293 * buffer_field, or Package), the name of the object is already 294 * in the namespace. 295 */ 296 if (walk_state->deferred_node) { 297 298 /* This name is already in the namespace, get the node */ 299 300 node = walk_state->deferred_node; 301 status = AE_OK; 302 break; 303 } 304 305 /* 306 * If we are executing a method, do not create any namespace objects 307 * during the load phase, only during execution. 308 */ 309 if (walk_state->method_node) { 310 node = NULL; 311 status = AE_OK; 312 break; 313 } 314 315 flags = ACPI_NS_NO_UPSEARCH; 316 if ((walk_state->opcode != AML_SCOPE_OP) && 317 (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) { 318 if (walk_state->namespace_override) { 319 flags |= ACPI_NS_OVERRIDE_IF_FOUND; 320 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 321 "[%s] Override allowed\n", 322 acpi_ut_get_type_name 323 (object_type))); 324 } else { 325 flags |= ACPI_NS_ERROR_IF_FOUND; 326 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 327 "[%s] Cannot already exist\n", 328 acpi_ut_get_type_name 329 (object_type))); 330 } 331 } else { 332 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 333 "[%s] Both Find or Create allowed\n", 334 acpi_ut_get_type_name(object_type))); 335 } 336 337 /* 338 * Enter the named type into the internal namespace. We enter the name 339 * as we go downward in the parse tree. Any necessary subobjects that 340 * involve arguments to the opcode must be created as we go back up the 341 * parse tree later. 342 */ 343 status = 344 acpi_ns_lookup(walk_state->scope_info, path, object_type, 345 ACPI_IMODE_LOAD_PASS1, flags, walk_state, 346 &node); 347 if (ACPI_FAILURE(status)) { 348 if (status == AE_ALREADY_EXISTS) { 349 350 /* The name already exists in this scope */ 351 352 if (node->flags & ANOBJ_IS_EXTERNAL) { 353 /* 354 * Allow one create on an object or segment that was 355 * previously declared External 356 */ 357 node->flags &= ~ANOBJ_IS_EXTERNAL; 358 node->type = (u8) object_type; 359 360 /* Just retyped a node, probably will need to open a scope */ 361 362 if (acpi_ns_opens_scope(object_type)) { 363 status = 364 acpi_ds_scope_stack_push 365 (node, object_type, 366 walk_state); 367 if (ACPI_FAILURE(status)) { 368 return_ACPI_STATUS 369 (status); 370 } 371 } 372 373 status = AE_OK; 374 } 375 } 376 377 if (ACPI_FAILURE(status)) { 378 ACPI_ERROR_NAMESPACE(path, status); 379 return_ACPI_STATUS(status); 380 } 381 } 382 break; 383 } 384 385 /* Common exit */ 386 387 if (!op) { 388 389 /* Create a new op */ 390 391 op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml); 392 if (!op) { 393 return_ACPI_STATUS(AE_NO_MEMORY); 394 } 395 } 396 397 /* Initialize the op */ 398 399 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)) 400 op->named.path = ACPI_CAST_PTR(u8, path); 401 #endif 402 403 if (node) { 404 /* 405 * Put the Node in the "op" object that the parser uses, so we 406 * can get it again quickly when this scope is closed 407 */ 408 op->common.node = node; 409 op->named.name = node->name.integer; 410 } 411 412 acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state), 413 op); 414 *out_op = op; 415 return_ACPI_STATUS(status); 416 } 417 418 /******************************************************************************* 419 * 420 * FUNCTION: acpi_ds_load1_end_op 421 * 422 * PARAMETERS: walk_state - Current state of the parse tree walk 423 * 424 * RETURN: Status 425 * 426 * DESCRIPTION: Ascending callback used during the loading of the namespace, 427 * both control methods and everything else. 428 * 429 ******************************************************************************/ 430 431 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) 432 { 433 union acpi_parse_object *op; 434 acpi_object_type object_type; 435 acpi_status status = AE_OK; 436 437 ACPI_FUNCTION_TRACE(ds_load1_end_op); 438 439 op = walk_state->op; 440 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, 441 walk_state)); 442 443 /* We are only interested in opcodes that have an associated name */ 444 445 if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) { 446 return_ACPI_STATUS(AE_OK); 447 } 448 449 /* Get the object type to determine if we should pop the scope */ 450 451 object_type = walk_state->op_info->object_type; 452 453 #ifndef ACPI_NO_METHOD_EXECUTION 454 if (walk_state->op_info->flags & AML_FIELD) { 455 /* 456 * If we are executing a method, do not create any namespace objects 457 * during the load phase, only during execution. 458 */ 459 if (!walk_state->method_node) { 460 if (walk_state->opcode == AML_FIELD_OP || 461 walk_state->opcode == AML_BANK_FIELD_OP || 462 walk_state->opcode == AML_INDEX_FIELD_OP) { 463 status = 464 acpi_ds_init_field_objects(op, walk_state); 465 } 466 } 467 return_ACPI_STATUS(status); 468 } 469 470 /* 471 * If we are executing a method, do not create any namespace objects 472 * during the load phase, only during execution. 473 */ 474 if (!walk_state->method_node) { 475 if (op->common.aml_opcode == AML_REGION_OP) { 476 status = 477 acpi_ex_create_region(op->named.data, 478 op->named.length, 479 (acpi_adr_space_type) ((op-> 480 common. 481 value. 482 arg)-> 483 common. 484 value. 485 integer), 486 walk_state); 487 if (ACPI_FAILURE(status)) { 488 return_ACPI_STATUS(status); 489 } 490 } else if (op->common.aml_opcode == AML_DATA_REGION_OP) { 491 status = 492 acpi_ex_create_region(op->named.data, 493 op->named.length, 494 ACPI_ADR_SPACE_DATA_TABLE, 495 walk_state); 496 if (ACPI_FAILURE(status)) { 497 return_ACPI_STATUS(status); 498 } 499 } 500 } 501 #endif 502 503 if (op->common.aml_opcode == AML_NAME_OP) { 504 505 /* For Name opcode, get the object type from the argument */ 506 507 if (op->common.value.arg) { 508 object_type = (acpi_ps_get_opcode_info((op->common. 509 value.arg)-> 510 common. 511 aml_opcode))-> 512 object_type; 513 514 /* Set node type if we have a namespace node */ 515 516 if (op->common.node) { 517 op->common.node->type = (u8) object_type; 518 } 519 } 520 } 521 522 /* 523 * If we are executing a method, do not create any namespace objects 524 * during the load phase, only during execution. 525 */ 526 if (!walk_state->method_node) { 527 if (op->common.aml_opcode == AML_METHOD_OP) { 528 /* 529 * method_op pkg_length name_string method_flags term_list 530 * 531 * Note: We must create the method node/object pair as soon as we 532 * see the method declaration. This allows later pass1 parsing 533 * of invocations of the method (need to know the number of 534 * arguments.) 535 */ 536 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 537 "LOADING-Method: State=%p Op=%p NamedObj=%p\n", 538 walk_state, op, op->named.node)); 539 540 if (!acpi_ns_get_attached_object(op->named.node)) { 541 walk_state->operands[0] = 542 ACPI_CAST_PTR(void, op->named.node); 543 walk_state->num_operands = 1; 544 545 status = 546 acpi_ds_create_operands(walk_state, 547 op->common.value. 548 arg); 549 if (ACPI_SUCCESS(status)) { 550 status = 551 acpi_ex_create_method(op->named. 552 data, 553 op->named. 554 length, 555 walk_state); 556 } 557 558 walk_state->operands[0] = NULL; 559 walk_state->num_operands = 0; 560 561 if (ACPI_FAILURE(status)) { 562 return_ACPI_STATUS(status); 563 } 564 } 565 } 566 } 567 568 /* Pop the scope stack (only if loading a table) */ 569 570 if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) { 571 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 572 "(%s): Popping scope for Op %p\n", 573 acpi_ut_get_type_name(object_type), op)); 574 575 status = acpi_ds_scope_stack_pop(walk_state); 576 } 577 578 return_ACPI_STATUS(status); 579 } 580