drivers/acpi/dispatcher/dswload.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload - Dispatcher namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, R. Byron Moore
   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 <acpi/acparser.h>
  46 #include <acpi/amlcode.h>
  47 #include <acpi/acdispat.h>
  48 #include <acpi/acinterp.h>
  49 #include <acpi/acnamesp.h>
  50 #include <acpi/acevents.h>
  51
  52 #ifdef ACPI_ASL_COMPILER
  53 #include <acpi/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 1:
  77                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
  78                     ACPI_PARSE_DELETE_TREE;
  79                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  80                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  81                 break;
  82
  83         case 2:
  84                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
  85                     ACPI_PARSE_DELETE_TREE;
  86                 walk_state->descending_callback = acpi_ds_load2_begin_op;
  87                 walk_state->ascending_callback = acpi_ds_load2_end_op;
  88                 break;
  89
  90         case 3:
  91 #ifndef ACPI_NO_METHOD_EXECUTION
  92                 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
  93                     ACPI_PARSE_DELETE_TREE;
  94                 walk_state->descending_callback = acpi_ds_exec_begin_op;
  95                 walk_state->ascending_callback = acpi_ds_exec_end_op;
  96 #endif
  97                 break;
  98
  99         default:
 100                 return (AE_BAD_PARAMETER);
 101         }
 102
 103         return (AE_OK);
 104 }
 105
 106 /*******************************************************************************
 107  *
 108  * FUNCTION:    acpi_ds_load1_begin_op
 109  *
 110  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 111  *              out_op          - Where to return op if a new one is created
 112  *
 113  * RETURN:      Status
 114  *
 115  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 116  *
 117  ******************************************************************************/
 118
 119 acpi_status
 120 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
 121                        union acpi_parse_object ** out_op)
 122 {
 123         union acpi_parse_object *op;
 124         struct acpi_namespace_node *node;
 125         acpi_status status;
 126         acpi_object_type object_type;
 127         char *path;
 128         u32 flags;
 129
 130         ACPI_FUNCTION_NAME("ds_load1_begin_op");
 131
 132         op = walk_state->op;
 133         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 134                           walk_state));
 135
 136         /* We are only interested in opcodes that have an associated name */
 137
 138         if (op) {
 139                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 140                         *out_op = op;
 141                         return (AE_OK);
 142                 }
 143
 144                 /* Check if this object has already been installed in the namespace */
 145
 146                 if (op->common.node) {
 147                         *out_op = op;
 148                         return (AE_OK);
 149                 }
 150         }
 151
 152         path = acpi_ps_get_next_namestring(&walk_state->parser_state);
 153
 154         /* Map the raw opcode into an internal object type */
 155
 156         object_type = walk_state->op_info->object_type;
 157
 158         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 159                           "State=%p Op=%p [%s]\n", walk_state, op,
 160                           acpi_ut_get_type_name(object_type)));
 161
 162         switch (walk_state->opcode) {
 163         case AML_SCOPE_OP:
 164
 165                 /*
 166                  * The target name of the Scope() operator must exist at this point so
 167                  * that we can actually open the scope to enter new names underneath it.
 168                  * Allow search-to-root for single namesegs.
 169                  */
 170                 status =
 171                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
 172                                    ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 173                                    walk_state, &(node));
 174 #ifdef ACPI_ASL_COMPILER
 175                 if (status == AE_NOT_FOUND) {
 176                         /*
 177                          * Table disassembly:
 178                          * Target of Scope() not found.  Generate an External for it, and
 179                          * insert the name into the namespace.
 180                          */
 181                         acpi_dm_add_to_external_list(path);
 182                         status =
 183                             acpi_ns_lookup(walk_state->scope_info, path,
 184                                            object_type, ACPI_IMODE_LOAD_PASS1,
 185                                            ACPI_NS_SEARCH_PARENT, walk_state,
 186                                            &(node));
 187                 }
 188 #endif
 189                 if (ACPI_FAILURE(status)) {
 190                         ACPI_REPORT_NSERROR(path, status);
 191                         return (status);
 192                 }
 193
 194                 /*
 195                  * Check to make sure that the target is
 196                  * one of the opcodes that actually opens a scope
 197                  */
 198                 switch (node->type) {
 199                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope  */
 200                 case ACPI_TYPE_DEVICE:
 201                 case ACPI_TYPE_POWER:
 202                 case ACPI_TYPE_PROCESSOR:
 203                 case ACPI_TYPE_THERMAL:
 204
 205                         /* These are acceptable types */
 206                         break;
 207
 208                 case ACPI_TYPE_INTEGER:
 209                 case ACPI_TYPE_STRING:
 210                 case ACPI_TYPE_BUFFER:
 211
 212                         /*
 213                          * These types we will allow, but we will change the type.  This
 214                          * enables some existing code of the form:
 215                          *
 216                          *  Name (DEB, 0)
 217                          *  Scope (DEB) { ... }
 218                          *
 219                          * Note: silently change the type here.  On the second pass, we will report
 220                          * a warning
 221                          */
 222
 223                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 224                                           "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 225                                           path,
 226                                           acpi_ut_get_type_name(node->type)));
 227
 228                         node->type = ACPI_TYPE_ANY;
 229                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 230                         break;
 231
 232                 default:
 233
 234                         /* All other types are an error */
 235
 236                         ACPI_REPORT_ERROR(("Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n", acpi_ut_get_type_name(node->type), path));
 237
 238                         return (AE_AML_OPERAND_TYPE);
 239                 }
 240                 break;
 241
 242         default:
 243
 244                 /*
 245                  * For all other named opcodes, we will enter the name into
 246                  * the namespace.
 247                  *
 248                  * Setup the search flags.
 249                  * Since we are entering a name into the namespace, we do not want to
 250                  * enable the search-to-root upsearch.
 251                  *
 252                  * There are only two conditions where it is acceptable that the name
 253                  * already exists:
 254                  *    1) the Scope() operator can reopen a scoping object that was
 255                  *       previously defined (Scope, Method, Device, etc.)
 256                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 257                  *       buffer_field, or Package), the name of the object is already
 258                  *       in the namespace.
 259                  */
 260                 if (walk_state->deferred_node) {
 261                         /* This name is already in the namespace, get the node */
 262
 263                         node = walk_state->deferred_node;
 264                         status = AE_OK;
 265                         break;
 266                 }
 267
 268                 flags = ACPI_NS_NO_UPSEARCH;
 269                 if ((walk_state->opcode != AML_SCOPE_OP) &&
 270                     (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 271                         flags |= ACPI_NS_ERROR_IF_FOUND;
 272                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 273                                           "[%s] Cannot already exist\n",
 274                                           acpi_ut_get_type_name(object_type)));
 275                 } else {
 276                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 277                                           "[%s] Both Find or Create allowed\n",
 278                                           acpi_ut_get_type_name(object_type)));
 279                 }
 280
 281                 /*
 282                  * Enter the named type into the internal namespace.  We enter the name
 283                  * as we go downward in the parse tree.  Any necessary subobjects that
 284                  * involve arguments to the opcode must be created as we go back up the
 285                  * parse tree later.
 286                  */
 287                 status =
 288                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
 289                                    ACPI_IMODE_LOAD_PASS1, flags, walk_state,
 290                                    &(node));
 291                 if (ACPI_FAILURE(status)) {
 292                         ACPI_REPORT_NSERROR(path, status);
 293                         return (status);
 294                 }
 295                 break;
 296         }
 297
 298         /* Common exit */
 299
 300         if (!op) {
 301                 /* Create a new op */
 302
 303                 op = acpi_ps_alloc_op(walk_state->opcode);
 304                 if (!op) {
 305                         return (AE_NO_MEMORY);
 306                 }
 307         }
 308
 309         /* Initialize */
 310
 311         op->named.name = node->name.integer;
 312
 313 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 314         op->named.path = ACPI_CAST_PTR(u8, path);
 315 #endif
 316
 317         /*
 318          * Put the Node in the "op" object that the parser uses, so we
 319          * can get it again quickly when this scope is closed
 320          */
 321         op->common.node = node;
 322         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
 323                            op);
 324
 325         *out_op = op;
 326         return (status);
 327 }
 328
 329 /*******************************************************************************
 330  *
 331  * FUNCTION:    acpi_ds_load1_end_op
 332  *
 333  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 334  *
 335  * RETURN:      Status
 336  *
 337  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 338  *              both control methods and everything else.
 339  *
 340  ******************************************************************************/
 341
 342 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state * walk_state)
 343 {
 344         union acpi_parse_object *op;
 345         acpi_object_type object_type;
 346         acpi_status status = AE_OK;
 347
 348         ACPI_FUNCTION_NAME("ds_load1_end_op");
 349
 350         op = walk_state->op;
 351         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 352                           walk_state));
 353
 354         /* We are only interested in opcodes that have an associated name */
 355
 356         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 357                 return (AE_OK);
 358         }
 359
 360         /* Get the object type to determine if we should pop the scope */
 361
 362         object_type = walk_state->op_info->object_type;
 363
 364 #ifndef ACPI_NO_METHOD_EXECUTION
 365         if (walk_state->op_info->flags & AML_FIELD) {
 366                 if (walk_state->opcode == AML_FIELD_OP ||
 367                     walk_state->opcode == AML_BANK_FIELD_OP ||
 368                     walk_state->opcode == AML_INDEX_FIELD_OP) {
 369                         status = acpi_ds_init_field_objects(op, walk_state);
 370                 }
 371                 return (status);
 372         }
 373
 374         if (op->common.aml_opcode == AML_REGION_OP) {
 375                 status = acpi_ex_create_region(op->named.data, op->named.length,
 376                                                (acpi_adr_space_type)
 377                                                ((op->common.value.arg)->common.
 378                                                 value.integer), walk_state);
 379                 if (ACPI_FAILURE(status)) {
 380                         return (status);
 381                 }
 382         }
 383 #endif
 384
 385         if (op->common.aml_opcode == AML_NAME_OP) {
 386                 /* For Name opcode, get the object type from the argument */
 387
 388                 if (op->common.value.arg) {
 389                         object_type = (acpi_ps_get_opcode_info((op->common.
 390                                                                 value.arg)->
 391                                                                common.
 392                                                                aml_opcode))->
 393                             object_type;
 394                         op->common.node->type = (u8) object_type;
 395                 }
 396         }
 397
 398         if (op->common.aml_opcode == AML_METHOD_OP) {
 399                 /*
 400                  * method_op pkg_length name_string method_flags term_list
 401                  *
 402                  * Note: We must create the method node/object pair as soon as we
 403                  * see the method declaration.  This allows later pass1 parsing
 404                  * of invocations of the method (need to know the number of
 405                  * arguments.)
 406                  */
 407                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 408                                   "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 409                                   walk_state, op, op->named.node));
 410
 411                 if (!acpi_ns_get_attached_object(op->named.node)) {
 412                         walk_state->operands[0] = (void *)op->named.node;
 413                         walk_state->num_operands = 1;
 414
 415                         status =
 416                             acpi_ds_create_operands(walk_state,
 417                                                     op->common.value.arg);
 418                         if (ACPI_SUCCESS(status)) {
 419                                 status = acpi_ex_create_method(op->named.data,
 420                                                                op->named.length,
 421                                                                walk_state);
 422                         }
 423                         walk_state->operands[0] = NULL;
 424                         walk_state->num_operands = 0;
 425
 426                         if (ACPI_FAILURE(status)) {
 427                                 return (status);
 428                         }
 429                 }
 430         }
 431
 432         /* Pop the scope stack */
 433
 434         if (acpi_ns_opens_scope(object_type)) {
 435                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 436                                   "(%s): Popping scope for Op %p\n",
 437                                   acpi_ut_get_type_name(object_type), op));
 438
 439                 status = acpi_ds_scope_stack_pop(walk_state);
 440         }
 441
 442         return (status);
 443 }
 444
 445 /*******************************************************************************
 446  *
 447  * FUNCTION:    acpi_ds_load2_begin_op
 448  *
 449  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 450  *              out_op          - Wher to return op if a new one is created
 451  *
 452  * RETURN:      Status
 453  *
 454  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 455  *
 456  ******************************************************************************/
 457
 458 acpi_status
 459 acpi_ds_load2_begin_op(struct acpi_walk_state * walk_state,
 460                        union acpi_parse_object ** out_op)
 461 {
 462         union acpi_parse_object *op;
 463         struct acpi_namespace_node *node;
 464         acpi_status status;
 465         acpi_object_type object_type;
 466         char *buffer_ptr;
 467
 468         ACPI_FUNCTION_TRACE("ds_load2_begin_op");
 469
 470         op = walk_state->op;
 471         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 472                           walk_state));
 473
 474         if (op) {
 475                 if ((walk_state->control_state) &&
 476                     (walk_state->control_state->common.state ==
 477                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 478                         /* We are executing a while loop outside of a method */
 479
 480                         status = acpi_ds_exec_begin_op(walk_state, out_op);
 481                         return_ACPI_STATUS(status);
 482                 }
 483
 484                 /* We only care about Namespace opcodes here */
 485
 486                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 487                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 488                     (!(walk_state->op_info->flags & AML_NAMED))) {
 489 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 490                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 491                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 492
 493                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 494                                                   "Begin/EXEC: %s (fl %8.8X)\n",
 495                                                   walk_state->op_info->name,
 496                                                   walk_state->op_info->flags));
 497
 498                                 /* Executing a type1 or type2 opcode outside of a method */
 499
 500                                 status =
 501                                     acpi_ds_exec_begin_op(walk_state, out_op);
 502                                 return_ACPI_STATUS(status);
 503                         }
 504 #endif
 505                         return_ACPI_STATUS(AE_OK);
 506                 }
 507
 508                 /* Get the name we are going to enter or lookup in the namespace */
 509
 510                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 511                         /* For Namepath op, get the path string */
 512
 513                         buffer_ptr = op->common.value.string;
 514                         if (!buffer_ptr) {
 515                                 /* No name, just exit */
 516
 517                                 return_ACPI_STATUS(AE_OK);
 518                         }
 519                 } else {
 520                         /* Get name from the op */
 521
 522                         buffer_ptr = (char *)&op->named.name;
 523                 }
 524         } else {
 525                 /* Get the namestring from the raw AML */
 526
 527                 buffer_ptr =
 528                     acpi_ps_get_next_namestring(&walk_state->parser_state);
 529         }
 530
 531         /* Map the opcode into an internal object type */
 532
 533         object_type = walk_state->op_info->object_type;
 534
 535         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 536                           "State=%p Op=%p Type=%X\n", walk_state, op,
 537                           object_type));
 538
 539         switch (walk_state->opcode) {
 540         case AML_FIELD_OP:
 541         case AML_BANK_FIELD_OP:
 542         case AML_INDEX_FIELD_OP:
 543
 544                 node = NULL;
 545                 status = AE_OK;
 546                 break;
 547
 548         case AML_INT_NAMEPATH_OP:
 549
 550                 /*
 551                  * The name_path is an object reference to an existing object.
 552                  * Don't enter the name into the namespace, but look it up
 553                  * for use later.
 554                  */
 555                 status =
 556                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 557                                    object_type, ACPI_IMODE_EXECUTE,
 558                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 559                 break;
 560
 561         case AML_SCOPE_OP:
 562
 563                 /*
 564                  * The Path is an object reference to an existing object.
 565                  * Don't enter the name into the namespace, but look it up
 566                  * for use later.
 567                  */
 568                 status =
 569                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 570                                    object_type, ACPI_IMODE_EXECUTE,
 571                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 572                 if (ACPI_FAILURE(status)) {
 573 #ifdef ACPI_ASL_COMPILER
 574                         if (status == AE_NOT_FOUND) {
 575                                 status = AE_OK;
 576                         } else {
 577                                 ACPI_REPORT_NSERROR(buffer_ptr, status);
 578                         }
 579 #else
 580                         ACPI_REPORT_NSERROR(buffer_ptr, status);
 581 #endif
 582                         return_ACPI_STATUS(status);
 583                 }
 584                 /*
 585                  * We must check to make sure that the target is
 586                  * one of the opcodes that actually opens a scope
 587                  */
 588                 switch (node->type) {
 589                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
 590                 case ACPI_TYPE_DEVICE:
 591                 case ACPI_TYPE_POWER:
 592                 case ACPI_TYPE_PROCESSOR:
 593                 case ACPI_TYPE_THERMAL:
 594
 595                         /* These are acceptable types */
 596                         break;
 597
 598                 case ACPI_TYPE_INTEGER:
 599                 case ACPI_TYPE_STRING:
 600                 case ACPI_TYPE_BUFFER:
 601
 602                         /*
 603                          * These types we will allow, but we will change the type.  This
 604                          * enables some existing code of the form:
 605                          *
 606                          *  Name (DEB, 0)
 607                          *  Scope (DEB) { ... }
 608                          */
 609
 610                         ACPI_REPORT_WARNING(("Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n", buffer_ptr, acpi_ut_get_type_name(node->type)));
 611
 612                         node->type = ACPI_TYPE_ANY;
 613                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 614                         break;
 615
 616                 default:
 617
 618                         /* All other types are an error */
 619
 620                         ACPI_REPORT_ERROR(("Invalid type (%s) for target of Scope operator [%4.4s]\n", acpi_ut_get_type_name(node->type), buffer_ptr));
 621
 622                         return (AE_AML_OPERAND_TYPE);
 623                 }
 624                 break;
 625
 626         default:
 627
 628                 /* All other opcodes */
 629
 630                 if (op && op->common.node) {
 631                         /* This op/node was previously entered into the namespace */
 632
 633                         node = op->common.node;
 634
 635                         if (acpi_ns_opens_scope(object_type)) {
 636                                 status =
 637                                     acpi_ds_scope_stack_push(node, object_type,
 638                                                              walk_state);
 639                                 if (ACPI_FAILURE(status)) {
 640                                         return_ACPI_STATUS(status);
 641                                 }
 642
 643                         }
 644                         return_ACPI_STATUS(AE_OK);
 645                 }
 646
 647                 /*
 648                  * Enter the named type into the internal namespace.  We enter the name
 649                  * as we go downward in the parse tree.  Any necessary subobjects that
 650                  * involve arguments to the opcode must be created as we go back up the
 651                  * parse tree later.
 652                  *
 653                  * Note: Name may already exist if we are executing a deferred opcode.
 654                  */
 655                 if (walk_state->deferred_node) {
 656                         /* This name is already in the namespace, get the node */
 657
 658                         node = walk_state->deferred_node;
 659                         status = AE_OK;
 660                         break;
 661                 }
 662
 663                 /* Add new entry into namespace */
 664
 665                 status =
 666                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 667                                    object_type, ACPI_IMODE_LOAD_PASS2,
 668                                    ACPI_NS_NO_UPSEARCH, walk_state, &(node));
 669                 break;
 670         }
 671
 672         if (ACPI_FAILURE(status)) {
 673                 ACPI_REPORT_NSERROR(buffer_ptr, status);
 674                 return_ACPI_STATUS(status);
 675         }
 676
 677         if (!op) {
 678                 /* Create a new op */
 679
 680                 op = acpi_ps_alloc_op(walk_state->opcode);
 681                 if (!op) {
 682                         return_ACPI_STATUS(AE_NO_MEMORY);
 683                 }
 684
 685                 /* Initialize the new op */
 686
 687                 if (node) {
 688                         op->named.name = node->name.integer;
 689                 }
 690                 *out_op = op;
 691         }
 692
 693         /*
 694          * Put the Node in the "op" object that the parser uses, so we
 695          * can get it again quickly when this scope is closed
 696          */
 697         op->common.node = node;
 698
 699         return_ACPI_STATUS(status);
 700 }
 701
 702 /*******************************************************************************
 703  *
 704  * FUNCTION:    acpi_ds_load2_end_op
 705  *
 706  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 707  *
 708  * RETURN:      Status
 709  *
 710  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 711  *              both control methods and everything else.
 712  *
 713  ******************************************************************************/
 714
 715 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 716 {
 717         union acpi_parse_object *op;
 718         acpi_status status = AE_OK;
 719         acpi_object_type object_type;
 720         struct acpi_namespace_node *node;
 721         union acpi_parse_object *arg;
 722         struct acpi_namespace_node *new_node;
 723 #ifndef ACPI_NO_METHOD_EXECUTION
 724         u32 i;
 725 #endif
 726
 727         ACPI_FUNCTION_TRACE("ds_load2_end_op");
 728
 729         op = walk_state->op;
 730         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 731                           walk_state->op_info->name, op, walk_state));
 732
 733         /* Check if opcode had an associated namespace object */
 734
 735         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 736 #ifndef ACPI_NO_METHOD_EXECUTION
 737 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 738                 /* No namespace object. Executable opcode? */
 739
 740                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 741                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 742                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 743                                           "End/EXEC:   %s (fl %8.8X)\n",
 744                                           walk_state->op_info->name,
 745                                           walk_state->op_info->flags));
 746
 747                         /* Executing a type1 or type2 opcode outside of a method */
 748
 749                         status = acpi_ds_exec_end_op(walk_state);
 750                         return_ACPI_STATUS(status);
 751                 }
 752 #endif
 753 #endif
 754                 return_ACPI_STATUS(AE_OK);
 755         }
 756
 757         if (op->common.aml_opcode == AML_SCOPE_OP) {
 758                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 759                                   "Ending scope Op=%p State=%p\n", op,
 760                                   walk_state));
 761         }
 762
 763         object_type = walk_state->op_info->object_type;
 764
 765         /*
 766          * Get the Node/name from the earlier lookup
 767          * (It was saved in the *op structure)
 768          */
 769         node = op->common.node;
 770
 771         /*
 772          * Put the Node on the object stack (Contains the ACPI Name of
 773          * this object)
 774          */
 775         walk_state->operands[0] = (void *)node;
 776         walk_state->num_operands = 1;
 777
 778         /* Pop the scope stack */
 779
 780         if (acpi_ns_opens_scope(object_type) &&
 781             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 782                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 783                                   "(%s) Popping scope for Op %p\n",
 784                                   acpi_ut_get_type_name(object_type), op));
 785
 786                 status = acpi_ds_scope_stack_pop(walk_state);
 787                 if (ACPI_FAILURE(status)) {
 788                         goto cleanup;
 789                 }
 790         }
 791
 792         /*
 793          * Named operations are as follows:
 794          *
 795          * AML_ALIAS
 796          * AML_BANKFIELD
 797          * AML_CREATEBITFIELD
 798          * AML_CREATEBYTEFIELD
 799          * AML_CREATEDWORDFIELD
 800          * AML_CREATEFIELD
 801          * AML_CREATEQWORDFIELD
 802          * AML_CREATEWORDFIELD
 803          * AML_DATA_REGION
 804          * AML_DEVICE
 805          * AML_EVENT
 806          * AML_FIELD
 807          * AML_INDEXFIELD
 808          * AML_METHOD
 809          * AML_METHODCALL
 810          * AML_MUTEX
 811          * AML_NAME
 812          * AML_NAMEDFIELD
 813          * AML_OPREGION
 814          * AML_POWERRES
 815          * AML_PROCESSOR
 816          * AML_SCOPE
 817          * AML_THERMALZONE
 818          */
 819
 820         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 821                           "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 822                           acpi_ps_get_opcode_name(op->common.aml_opcode),
 823                           walk_state, op, node));
 824
 825         /* Decode the opcode */
 826
 827         arg = op->common.value.arg;
 828
 829         switch (walk_state->op_info->type) {
 830 #ifndef ACPI_NO_METHOD_EXECUTION
 831
 832         case AML_TYPE_CREATE_FIELD:
 833
 834                 /*
 835                  * Create the field object, but the field buffer and index must
 836                  * be evaluated later during the execution phase
 837                  */
 838                 status = acpi_ds_create_buffer_field(op, walk_state);
 839                 break;
 840
 841         case AML_TYPE_NAMED_FIELD:
 842
 843                 switch (op->common.aml_opcode) {
 844                 case AML_INDEX_FIELD_OP:
 845
 846                         status =
 847                             acpi_ds_create_index_field(op,
 848                                                        (acpi_handle) arg->
 849                                                        common.node, walk_state);
 850                         break;
 851
 852                 case AML_BANK_FIELD_OP:
 853
 854                         status =
 855                             acpi_ds_create_bank_field(op, arg->common.node,
 856                                                       walk_state);
 857                         break;
 858
 859                 case AML_FIELD_OP:
 860
 861                         status =
 862                             acpi_ds_create_field(op, arg->common.node,
 863                                                  walk_state);
 864                         break;
 865
 866                 default:
 867                         /* All NAMED_FIELD opcodes must be handled above */
 868                         break;
 869                 }
 870                 break;
 871
 872         case AML_TYPE_NAMED_SIMPLE:
 873
 874                 status = acpi_ds_create_operands(walk_state, arg);
 875                 if (ACPI_FAILURE(status)) {
 876                         goto cleanup;
 877                 }
 878
 879                 switch (op->common.aml_opcode) {
 880                 case AML_PROCESSOR_OP:
 881
 882                         status = acpi_ex_create_processor(walk_state);
 883                         break;
 884
 885                 case AML_POWER_RES_OP:
 886
 887                         status = acpi_ex_create_power_resource(walk_state);
 888                         break;
 889
 890                 case AML_MUTEX_OP:
 891
 892                         status = acpi_ex_create_mutex(walk_state);
 893                         break;
 894
 895                 case AML_EVENT_OP:
 896
 897                         status = acpi_ex_create_event(walk_state);
 898                         break;
 899
 900                 case AML_DATA_REGION_OP:
 901
 902                         status = acpi_ex_create_table_region(walk_state);
 903                         break;
 904
 905                 case AML_ALIAS_OP:
 906
 907                         status = acpi_ex_create_alias(walk_state);
 908                         break;
 909
 910                 default:
 911                         /* Unknown opcode */
 912
 913                         status = AE_OK;
 914                         goto cleanup;
 915                 }
 916
 917                 /* Delete operands */
 918
 919                 for (i = 1; i < walk_state->num_operands; i++) {
 920                         acpi_ut_remove_reference(walk_state->operands[i]);
 921                         walk_state->operands[i] = NULL;
 922                 }
 923
 924                 break;
 925 #endif                          /* ACPI_NO_METHOD_EXECUTION */
 926
 927         case AML_TYPE_NAMED_COMPLEX:
 928
 929                 switch (op->common.aml_opcode) {
 930 #ifndef ACPI_NO_METHOD_EXECUTION
 931                 case AML_REGION_OP:
 932                         /*
 933                          * The op_region is not fully parsed at this time. Only valid
 934                          * argument is the space_id. (We must save the address of the
 935                          * AML of the address and length operands)
 936                          */
 937                         /*
 938                          * If we have a valid region, initialize it
 939                          * Namespace is NOT locked at this point.
 940                          */
 941                         status =
 942                             acpi_ev_initialize_region
 943                             (acpi_ns_get_attached_object(node), FALSE);
 944                         if (ACPI_FAILURE(status)) {
 945                                 /*
 946                                  *  If AE_NOT_EXIST is returned, it is not fatal
 947                                  *  because many regions get created before a handler
 948                                  *  is installed for said region.
 949                                  */
 950                                 if (AE_NOT_EXIST == status) {
 951                                         status = AE_OK;
 952                                 }
 953                         }
 954                         break;
 955
 956                 case AML_NAME_OP:
 957
 958                         status = acpi_ds_create_node(walk_state, node, op);
 959                         break;
 960 #endif                          /* ACPI_NO_METHOD_EXECUTION */
 961
 962                 default:
 963                         /* All NAMED_COMPLEX opcodes must be handled above */
 964                         /* Note: Method objects were already created in Pass 1 */
 965                         break;
 966                 }
 967                 break;
 968
 969         case AML_CLASS_INTERNAL:
 970
 971                 /* case AML_INT_NAMEPATH_OP: */
 972                 break;
 973
 974         case AML_CLASS_METHOD_CALL:
 975
 976                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 977                                   "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 978                                   walk_state, op, node));
 979
 980                 /*
 981                  * Lookup the method name and save the Node
 982                  */
 983                 status =
 984                     acpi_ns_lookup(walk_state->scope_info,
 985                                    arg->common.value.string, ACPI_TYPE_ANY,
 986                                    ACPI_IMODE_LOAD_PASS2,
 987                                    ACPI_NS_SEARCH_PARENT |
 988                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
 989                                    &(new_node));
 990                 if (ACPI_SUCCESS(status)) {
 991
 992                         /*
 993                          * Make sure that what we found is indeed a method
 994                          * We didn't search for a method on purpose, to see if the name
 995                          * would resolve
 996                          */
 997                         if (new_node->type != ACPI_TYPE_METHOD) {
 998                                 status = AE_AML_OPERAND_TYPE;
 999                         }
1000
1001                         /* We could put the returned object (Node) on the object stack for
1002                          * later, but for now, we will put it in the "op" object that the
1003                          * parser uses, so we can get it again at the end of this scope
1004                          */
1005                         op->common.node = new_node;
1006                 } else {
1007                         ACPI_REPORT_NSERROR(arg->common.value.string, status);
1008                 }
1009                 break;
1010
1011         default:
1012                 break;
1013         }
1014
1015       cleanup:
1016
1017         /* Remove the Node pushed at the very beginning */
1018
1019         walk_state->operands[0] = NULL;
1020         walk_state->num_operands = 0;
1021         return_ACPI_STATUS(status);
1022 }