1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks 5 * 6 * Copyright (C) 2000 - 2019, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #include <acpi/acpi.h> 11 #include "accommon.h" 12 #include "acparser.h" 13 #include "amlcode.h" 14 #include "acdispat.h" 15 #include "acinterp.h" 16 #include "acnamesp.h" 17 #include "acevents.h" 18 19 #define _COMPONENT ACPI_DISPATCHER 20 ACPI_MODULE_NAME("dswload2") 21 22 /******************************************************************************* 23 * 24 * FUNCTION: acpi_ds_load2_begin_op 25 * 26 * PARAMETERS: walk_state - Current state of the parse tree walk 27 * out_op - Where to return op if a new one is created 28 * 29 * RETURN: Status 30 * 31 * DESCRIPTION: Descending callback used during the loading of ACPI tables. 32 * 33 ******************************************************************************/ 34 acpi_status 35 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, 36 union acpi_parse_object **out_op) 37 { 38 union acpi_parse_object *op; 39 struct acpi_namespace_node *node; 40 acpi_status status; 41 acpi_object_type object_type; 42 char *buffer_ptr; 43 u32 flags; 44 45 ACPI_FUNCTION_TRACE(ds_load2_begin_op); 46 47 op = walk_state->op; 48 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, 49 walk_state)); 50 51 if (op) { 52 if ((walk_state->control_state) && 53 (walk_state->control_state->common.state == 54 ACPI_CONTROL_CONDITIONAL_EXECUTING)) { 55 56 /* We are executing a while loop outside of a method */ 57 58 status = acpi_ds_exec_begin_op(walk_state, out_op); 59 return_ACPI_STATUS(status); 60 } 61 62 /* We only care about Namespace opcodes here */ 63 64 if ((!(walk_state->op_info->flags & AML_NSOPCODE) && 65 (walk_state->opcode != AML_INT_NAMEPATH_OP)) || 66 (!(walk_state->op_info->flags & AML_NAMED))) { 67 return_ACPI_STATUS(AE_OK); 68 } 69 70 /* Get the name we are going to enter or lookup in the namespace */ 71 72 if (walk_state->opcode == AML_INT_NAMEPATH_OP) { 73 74 /* For Namepath op, get the path string */ 75 76 buffer_ptr = op->common.value.string; 77 if (!buffer_ptr) { 78 79 /* No name, just exit */ 80 81 return_ACPI_STATUS(AE_OK); 82 } 83 } else { 84 /* Get name from the op */ 85 86 buffer_ptr = ACPI_CAST_PTR(char, &op->named.name); 87 } 88 } else { 89 /* Get the namestring from the raw AML */ 90 91 buffer_ptr = 92 acpi_ps_get_next_namestring(&walk_state->parser_state); 93 } 94 95 /* Map the opcode into an internal object type */ 96 97 object_type = walk_state->op_info->object_type; 98 99 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 100 "State=%p Op=%p Type=%X\n", walk_state, op, 101 object_type)); 102 103 switch (walk_state->opcode) { 104 case AML_FIELD_OP: 105 case AML_BANK_FIELD_OP: 106 case AML_INDEX_FIELD_OP: 107 108 node = NULL; 109 status = AE_OK; 110 break; 111 112 case AML_INT_NAMEPATH_OP: 113 /* 114 * The name_path is an object reference to an existing object. 115 * Don't enter the name into the namespace, but look it up 116 * for use later. 117 */ 118 status = 119 acpi_ns_lookup(walk_state->scope_info, buffer_ptr, 120 object_type, ACPI_IMODE_EXECUTE, 121 ACPI_NS_SEARCH_PARENT, walk_state, &(node)); 122 break; 123 124 case AML_SCOPE_OP: 125 126 /* Special case for Scope(\) -> refers to the Root node */ 127 128 if (op && (op->named.node == acpi_gbl_root_node)) { 129 node = op->named.node; 130 131 status = 132 acpi_ds_scope_stack_push(node, object_type, 133 walk_state); 134 if (ACPI_FAILURE(status)) { 135 return_ACPI_STATUS(status); 136 } 137 } else { 138 /* 139 * The Path is an object reference to an existing object. 140 * Don't enter the name into the namespace, but look it up 141 * for use later. 142 */ 143 status = 144 acpi_ns_lookup(walk_state->scope_info, buffer_ptr, 145 object_type, ACPI_IMODE_EXECUTE, 146 ACPI_NS_SEARCH_PARENT, walk_state, 147 &(node)); 148 if (ACPI_FAILURE(status)) { 149 #ifdef ACPI_ASL_COMPILER 150 if (status == AE_NOT_FOUND) { 151 status = AE_OK; 152 } else { 153 ACPI_ERROR_NAMESPACE(walk_state-> 154 scope_info, 155 buffer_ptr, 156 status); 157 } 158 #else 159 ACPI_ERROR_NAMESPACE(walk_state->scope_info, 160 buffer_ptr, status); 161 #endif 162 return_ACPI_STATUS(status); 163 } 164 } 165 166 /* 167 * We must check to make sure that the target is 168 * one of the opcodes that actually opens a scope 169 */ 170 switch (node->type) { 171 case ACPI_TYPE_ANY: 172 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ 173 case ACPI_TYPE_DEVICE: 174 case ACPI_TYPE_POWER: 175 case ACPI_TYPE_PROCESSOR: 176 case ACPI_TYPE_THERMAL: 177 178 /* These are acceptable types */ 179 break; 180 181 case ACPI_TYPE_INTEGER: 182 case ACPI_TYPE_STRING: 183 case ACPI_TYPE_BUFFER: 184 185 /* 186 * These types we will allow, but we will change the type. 187 * This enables some existing code of the form: 188 * 189 * Name (DEB, 0) 190 * Scope (DEB) { ... } 191 */ 192 ACPI_WARNING((AE_INFO, 193 "Type override - [%4.4s] had invalid type (%s) " 194 "for Scope operator, changed to type ANY", 195 acpi_ut_get_node_name(node), 196 acpi_ut_get_type_name(node->type))); 197 198 node->type = ACPI_TYPE_ANY; 199 walk_state->scope_info->common.value = ACPI_TYPE_ANY; 200 break; 201 202 case ACPI_TYPE_METHOD: 203 204 /* 205 * Allow scope change to root during execution of module-level 206 * code. Root is typed METHOD during this time. 207 */ 208 if ((node == acpi_gbl_root_node) && 209 (walk_state-> 210 parse_flags & ACPI_PARSE_MODULE_LEVEL)) { 211 break; 212 } 213 214 /*lint -fallthrough */ 215 216 default: 217 218 /* All other types are an error */ 219 220 ACPI_ERROR((AE_INFO, 221 "Invalid type (%s) for target of " 222 "Scope operator [%4.4s] (Cannot override)", 223 acpi_ut_get_type_name(node->type), 224 acpi_ut_get_node_name(node))); 225 226 return_ACPI_STATUS(AE_AML_OPERAND_TYPE); 227 } 228 break; 229 230 default: 231 232 /* All other opcodes */ 233 234 if (op && op->common.node) { 235 236 /* This op/node was previously entered into the namespace */ 237 238 node = op->common.node; 239 240 if (acpi_ns_opens_scope(object_type)) { 241 status = 242 acpi_ds_scope_stack_push(node, object_type, 243 walk_state); 244 if (ACPI_FAILURE(status)) { 245 return_ACPI_STATUS(status); 246 } 247 } 248 249 return_ACPI_STATUS(AE_OK); 250 } 251 252 /* 253 * Enter the named type into the internal namespace. We enter the name 254 * as we go downward in the parse tree. Any necessary subobjects that 255 * involve arguments to the opcode must be created as we go back up the 256 * parse tree later. 257 * 258 * Note: Name may already exist if we are executing a deferred opcode. 259 */ 260 if (walk_state->deferred_node) { 261 262 /* This name is already in the namespace, get the node */ 263 264 node = walk_state->deferred_node; 265 status = AE_OK; 266 break; 267 } 268 269 flags = ACPI_NS_NO_UPSEARCH; 270 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) { 271 272 /* Execution mode, node cannot already exist, node is temporary */ 273 274 flags |= ACPI_NS_ERROR_IF_FOUND; 275 276 if (! 277 (walk_state-> 278 parse_flags & ACPI_PARSE_MODULE_LEVEL)) { 279 flags |= ACPI_NS_TEMPORARY; 280 } 281 } 282 #ifdef ACPI_ASL_COMPILER 283 284 /* 285 * Do not open a scope for AML_EXTERNAL_OP 286 * acpi_ns_lookup can open a new scope based on the object type 287 * of this op. AML_EXTERNAL_OP is a declaration rather than a 288 * definition. In the case that this external is a method object, 289 * acpi_ns_lookup will open a new scope. However, an AML_EXTERNAL_OP 290 * associated with the ACPI_TYPE_METHOD is a declaration, rather than 291 * a definition. Flags is set to avoid opening a scope for any 292 * AML_EXTERNAL_OP. 293 */ 294 if (walk_state->opcode == AML_EXTERNAL_OP) { 295 flags |= ACPI_NS_DONT_OPEN_SCOPE; 296 } 297 #endif 298 299 /* 300 * For name creation opcodes, the full namepath prefix must 301 * exist, except for the final (new) nameseg. 302 */ 303 if (walk_state->op_info->flags & AML_NAMED) { 304 flags |= ACPI_NS_PREFIX_MUST_EXIST; 305 } 306 307 /* Add new entry or lookup existing entry */ 308 309 status = 310 acpi_ns_lookup(walk_state->scope_info, buffer_ptr, 311 object_type, ACPI_IMODE_LOAD_PASS2, flags, 312 walk_state, &node); 313 314 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) { 315 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 316 "***New Node [%4.4s] %p is temporary\n", 317 acpi_ut_get_node_name(node), node)); 318 } 319 break; 320 } 321 322 if (ACPI_FAILURE(status)) { 323 ACPI_ERROR_NAMESPACE(walk_state->scope_info, 324 buffer_ptr, status); 325 return_ACPI_STATUS(status); 326 } 327 328 if (!op) { 329 330 /* Create a new op */ 331 332 op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml); 333 if (!op) { 334 return_ACPI_STATUS(AE_NO_MEMORY); 335 } 336 337 /* Initialize the new op */ 338 339 if (node) { 340 op->named.name = node->name.integer; 341 } 342 *out_op = op; 343 } 344 345 /* 346 * Put the Node in the "op" object that the parser uses, so we 347 * can get it again quickly when this scope is closed 348 */ 349 op->common.node = node; 350 return_ACPI_STATUS(status); 351 } 352 353 /******************************************************************************* 354 * 355 * FUNCTION: acpi_ds_load2_end_op 356 * 357 * PARAMETERS: walk_state - Current state of the parse tree walk 358 * 359 * RETURN: Status 360 * 361 * DESCRIPTION: Ascending callback used during the loading of the namespace, 362 * both control methods and everything else. 363 * 364 ******************************************************************************/ 365 366 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state) 367 { 368 union acpi_parse_object *op; 369 acpi_status status = AE_OK; 370 acpi_object_type object_type; 371 struct acpi_namespace_node *node; 372 union acpi_parse_object *arg; 373 struct acpi_namespace_node *new_node; 374 u32 i; 375 u8 region_space; 376 377 ACPI_FUNCTION_TRACE(ds_load2_end_op); 378 379 op = walk_state->op; 380 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n", 381 walk_state->op_info->name, op, walk_state)); 382 383 /* Check if opcode had an associated namespace object */ 384 385 if (!(walk_state->op_info->flags & AML_NSOBJECT)) { 386 return_ACPI_STATUS(AE_OK); 387 } 388 389 if (op->common.aml_opcode == AML_SCOPE_OP) { 390 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 391 "Ending scope Op=%p State=%p\n", op, 392 walk_state)); 393 } 394 395 object_type = walk_state->op_info->object_type; 396 397 /* 398 * Get the Node/name from the earlier lookup 399 * (It was saved in the *op structure) 400 */ 401 node = op->common.node; 402 403 /* 404 * Put the Node on the object stack (Contains the ACPI Name of 405 * this object) 406 */ 407 walk_state->operands[0] = (void *)node; 408 walk_state->num_operands = 1; 409 410 /* Pop the scope stack */ 411 412 if (acpi_ns_opens_scope(object_type) && 413 (op->common.aml_opcode != AML_INT_METHODCALL_OP)) { 414 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 415 "(%s) Popping scope for Op %p\n", 416 acpi_ut_get_type_name(object_type), op)); 417 418 status = acpi_ds_scope_stack_pop(walk_state); 419 if (ACPI_FAILURE(status)) { 420 goto cleanup; 421 } 422 } 423 424 /* 425 * Named operations are as follows: 426 * 427 * AML_ALIAS 428 * AML_BANKFIELD 429 * AML_CREATEBITFIELD 430 * AML_CREATEBYTEFIELD 431 * AML_CREATEDWORDFIELD 432 * AML_CREATEFIELD 433 * AML_CREATEQWORDFIELD 434 * AML_CREATEWORDFIELD 435 * AML_DATA_REGION 436 * AML_DEVICE 437 * AML_EVENT 438 * AML_FIELD 439 * AML_INDEXFIELD 440 * AML_METHOD 441 * AML_METHODCALL 442 * AML_MUTEX 443 * AML_NAME 444 * AML_NAMEDFIELD 445 * AML_OPREGION 446 * AML_POWERRES 447 * AML_PROCESSOR 448 * AML_SCOPE 449 * AML_THERMALZONE 450 */ 451 452 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 453 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n", 454 acpi_ps_get_opcode_name(op->common.aml_opcode), 455 walk_state, op, node)); 456 457 /* Decode the opcode */ 458 459 arg = op->common.value.arg; 460 461 switch (walk_state->op_info->type) { 462 463 case AML_TYPE_CREATE_FIELD: 464 /* 465 * Create the field object, but the field buffer and index must 466 * be evaluated later during the execution phase 467 */ 468 status = acpi_ds_create_buffer_field(op, walk_state); 469 break; 470 471 case AML_TYPE_NAMED_FIELD: 472 /* 473 * If we are executing a method, initialize the field 474 */ 475 if (walk_state->method_node) { 476 status = acpi_ds_init_field_objects(op, walk_state); 477 } 478 479 switch (op->common.aml_opcode) { 480 case AML_INDEX_FIELD_OP: 481 482 status = 483 acpi_ds_create_index_field(op, 484 (acpi_handle)arg->common. 485 node, walk_state); 486 break; 487 488 case AML_BANK_FIELD_OP: 489 490 status = 491 acpi_ds_create_bank_field(op, arg->common.node, 492 walk_state); 493 break; 494 495 case AML_FIELD_OP: 496 497 status = 498 acpi_ds_create_field(op, arg->common.node, 499 walk_state); 500 break; 501 502 default: 503 504 /* All NAMED_FIELD opcodes must be handled above */ 505 break; 506 } 507 break; 508 509 case AML_TYPE_NAMED_SIMPLE: 510 511 status = acpi_ds_create_operands(walk_state, arg); 512 if (ACPI_FAILURE(status)) { 513 goto cleanup; 514 } 515 516 switch (op->common.aml_opcode) { 517 case AML_PROCESSOR_OP: 518 519 status = acpi_ex_create_processor(walk_state); 520 break; 521 522 case AML_POWER_RESOURCE_OP: 523 524 status = acpi_ex_create_power_resource(walk_state); 525 break; 526 527 case AML_MUTEX_OP: 528 529 status = acpi_ex_create_mutex(walk_state); 530 break; 531 532 case AML_EVENT_OP: 533 534 status = acpi_ex_create_event(walk_state); 535 break; 536 537 case AML_ALIAS_OP: 538 539 status = acpi_ex_create_alias(walk_state); 540 break; 541 542 default: 543 544 /* Unknown opcode */ 545 546 status = AE_OK; 547 goto cleanup; 548 } 549 550 /* Delete operands */ 551 552 for (i = 1; i < walk_state->num_operands; i++) { 553 acpi_ut_remove_reference(walk_state->operands[i]); 554 walk_state->operands[i] = NULL; 555 } 556 557 break; 558 559 case AML_TYPE_NAMED_COMPLEX: 560 561 switch (op->common.aml_opcode) { 562 case AML_REGION_OP: 563 case AML_DATA_REGION_OP: 564 565 if (op->common.aml_opcode == AML_REGION_OP) { 566 region_space = (acpi_adr_space_type) 567 ((op->common.value.arg)->common.value. 568 integer); 569 } else { 570 region_space = ACPI_ADR_SPACE_DATA_TABLE; 571 } 572 573 /* 574 * The op_region is not fully parsed at this time. The only valid 575 * argument is the space_id. (We must save the address of the 576 * AML of the address and length operands) 577 * 578 * If we have a valid region, initialize it. The namespace is 579 * unlocked at this point. 580 * 581 * Need to unlock interpreter if it is locked (if we are running 582 * a control method), in order to allow _REG methods to be run 583 * during acpi_ev_initialize_region. 584 */ 585 if (walk_state->method_node) { 586 /* 587 * Executing a method: initialize the region and unlock 588 * the interpreter 589 */ 590 status = acpi_ex_create_region(op->named.data, 591 op->named.length, 592 region_space, 593 walk_state); 594 if (ACPI_FAILURE(status)) { 595 return_ACPI_STATUS(status); 596 } 597 } 598 599 status = 600 acpi_ev_initialize_region 601 (acpi_ns_get_attached_object(node)); 602 break; 603 604 case AML_NAME_OP: 605 606 status = acpi_ds_create_node(walk_state, node, op); 607 break; 608 609 case AML_METHOD_OP: 610 /* 611 * method_op pkg_length name_string method_flags term_list 612 * 613 * Note: We must create the method node/object pair as soon as we 614 * see the method declaration. This allows later pass1 parsing 615 * of invocations of the method (need to know the number of 616 * arguments.) 617 */ 618 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 619 "LOADING-Method: State=%p Op=%p NamedObj=%p\n", 620 walk_state, op, op->named.node)); 621 622 if (!acpi_ns_get_attached_object(op->named.node)) { 623 walk_state->operands[0] = 624 ACPI_CAST_PTR(void, op->named.node); 625 walk_state->num_operands = 1; 626 627 status = 628 acpi_ds_create_operands(walk_state, 629 op->common.value. 630 arg); 631 if (ACPI_SUCCESS(status)) { 632 status = 633 acpi_ex_create_method(op->named. 634 data, 635 op->named. 636 length, 637 walk_state); 638 } 639 640 walk_state->operands[0] = NULL; 641 walk_state->num_operands = 0; 642 643 if (ACPI_FAILURE(status)) { 644 return_ACPI_STATUS(status); 645 } 646 } 647 break; 648 649 default: 650 651 /* All NAMED_COMPLEX opcodes must be handled above */ 652 break; 653 } 654 break; 655 656 case AML_CLASS_INTERNAL: 657 658 /* case AML_INT_NAMEPATH_OP: */ 659 break; 660 661 case AML_CLASS_METHOD_CALL: 662 663 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 664 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n", 665 walk_state, op, node)); 666 667 /* 668 * Lookup the method name and save the Node 669 */ 670 status = 671 acpi_ns_lookup(walk_state->scope_info, 672 arg->common.value.string, ACPI_TYPE_ANY, 673 ACPI_IMODE_LOAD_PASS2, 674 ACPI_NS_SEARCH_PARENT | 675 ACPI_NS_DONT_OPEN_SCOPE, walk_state, 676 &(new_node)); 677 if (ACPI_SUCCESS(status)) { 678 /* 679 * Make sure that what we found is indeed a method 680 * We didn't search for a method on purpose, to see if the name 681 * would resolve 682 */ 683 if (new_node->type != ACPI_TYPE_METHOD) { 684 status = AE_AML_OPERAND_TYPE; 685 } 686 687 /* We could put the returned object (Node) on the object stack for 688 * later, but for now, we will put it in the "op" object that the 689 * parser uses, so we can get it again at the end of this scope 690 */ 691 op->common.node = new_node; 692 } else { 693 ACPI_ERROR_NAMESPACE(walk_state->scope_info, 694 arg->common.value.string, status); 695 } 696 break; 697 698 default: 699 700 break; 701 } 702 703 cleanup: 704 705 /* Remove the Node pushed at the very beginning */ 706 707 walk_state->operands[0] = NULL; 708 walk_state->num_operands = 0; 709 return_ACPI_STATUS(status); 710 } 711