drivers/acpi/dispatcher/dswload.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload - Dispatcher namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2004, 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
  45 #include <acpi/acpi.h>
  46 #include <acpi/acparser.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/acdispat.h>
  49 #include <acpi/acinterp.h>
  50 #include <acpi/acnamesp.h>
  51 #include <acpi/acevents.h>
  52
  53
  54 #define _COMPONENT          ACPI_DISPATCHER
  55          ACPI_MODULE_NAME    ("dswload")
  56
  57
  58 /*******************************************************************************
  59  *
  60  * FUNCTION:    acpi_ds_init_callbacks
  61  *
  62  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  63  *              pass_number     - 1, 2, or 3
  64  *
  65  * RETURN:      Status
  66  *
  67  * DESCRIPTION: Init walk state callbacks
  68  *
  69  ******************************************************************************/
  70
  71 acpi_status
  72 acpi_ds_init_callbacks (
  73         struct acpi_walk_state          *walk_state,
  74         u32                             pass_number)
  75 {
  76
  77         switch (pass_number) {
  78         case 1:
  79                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE;
  80                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  81                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  82                 break;
  83
  84         case 2:
  85                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 | 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  | ACPI_PARSE_DELETE_TREE;
  93                 walk_state->descending_callback = acpi_ds_exec_begin_op;
  94                 walk_state->ascending_callback = acpi_ds_exec_end_op;
  95 #endif
  96                 break;
  97
  98         default:
  99                 return (AE_BAD_PARAMETER);
 100         }
 101
 102         return (AE_OK);
 103 }
 104
 105
 106 /*******************************************************************************
 107  *
 108  * FUNCTION:    acpi_ds_load1_begin_op
 109  *
 110  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 111  *              Op              - Op that has been just been reached in the
 112  *                                walk;  Arguments have not been evaluated yet.
 113  *
 114  * RETURN:      Status
 115  *
 116  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 117  *
 118  ******************************************************************************/
 119
 120 acpi_status
 121 acpi_ds_load1_begin_op (
 122         struct acpi_walk_state          *walk_state,
 123         union acpi_parse_object         **out_op)
 124 {
 125         union acpi_parse_object         *op;
 126         struct acpi_namespace_node      *node;
 127         acpi_status                     status;
 128         acpi_object_type                object_type;
 129         char                            *path;
 130         u32                             flags;
 131
 132
 133         ACPI_FUNCTION_NAME ("ds_load1_begin_op");
 134
 135
 136         op = walk_state->op;
 137         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 138
 139         /* We are only interested in opcodes that have an associated name */
 140
 141         if (op) {
 142                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 143 #if 0
 144                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 145                                 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 146                                 acpi_os_printf ("\n\n***EXECUTABLE OPCODE %s***\n\n", walk_state->op_info->name);
 147                                 *out_op = op;
 148                                 return (AE_CTRL_SKIP);
 149                         }
 150 #endif
 151                         *out_op = op;
 152                         return (AE_OK);
 153                 }
 154
 155                 /* Check if this object has already been installed in the namespace */
 156
 157                 if (op->common.node) {
 158                         *out_op = op;
 159                         return (AE_OK);
 160                 }
 161         }
 162
 163         path = acpi_ps_get_next_namestring (&walk_state->parser_state);
 164
 165         /* Map the raw opcode into an internal object type */
 166
 167         object_type = walk_state->op_info->object_type;
 168
 169         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 170                 "State=%p Op=%p [%s]\n", walk_state, op, acpi_ut_get_type_name (object_type)));
 171
 172         switch (walk_state->opcode) {
 173         case AML_SCOPE_OP:
 174
 175                 /*
 176                  * The target name of the Scope() operator must exist at this point so
 177                  * that we can actually open the scope to enter new names underneath it.
 178                  * Allow search-to-root for single namesegs.
 179                  */
 180                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 181                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 182                 if (ACPI_FAILURE (status)) {
 183                         ACPI_REPORT_NSERROR (path, status);
 184                         return (status);
 185                 }
 186
 187                 /*
 188                  * Check to make sure that the target is
 189                  * one of the opcodes that actually opens a scope
 190                  */
 191                 switch (node->type) {
 192                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
 193                 case ACPI_TYPE_DEVICE:
 194                 case ACPI_TYPE_POWER:
 195                 case ACPI_TYPE_PROCESSOR:
 196                 case ACPI_TYPE_THERMAL:
 197
 198                         /* These are acceptable types */
 199                         break;
 200
 201                 case ACPI_TYPE_INTEGER:
 202                 case ACPI_TYPE_STRING:
 203                 case ACPI_TYPE_BUFFER:
 204
 205                         /*
 206                          * These types we will allow, but we will change the type.  This
 207                          * enables some existing code of the form:
 208                          *
 209                          *  Name (DEB, 0)
 210                          *  Scope (DEB) { ... }
 211                          *
 212                          * Note: silently change the type here.  On the second pass, we will report a warning
 213                          */
 214
 215                         ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 216                                 path, acpi_ut_get_type_name (node->type)));
 217
 218                         node->type = ACPI_TYPE_ANY;
 219                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 220                         break;
 221
 222                 default:
 223
 224                         /* All other types are an error */
 225
 226                         ACPI_REPORT_ERROR (("Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n",
 227                                 acpi_ut_get_type_name (node->type), path));
 228
 229                         return (AE_AML_OPERAND_TYPE);
 230                 }
 231                 break;
 232
 233
 234         default:
 235
 236                 /*
 237                  * For all other named opcodes, we will enter the name into the namespace.
 238                  *
 239                  * Setup the search flags.
 240                  * Since we are entering a name into the namespace, we do not want to
 241                  * enable the search-to-root upsearch.
 242                  *
 243                  * There are only two conditions where it is acceptable that the name
 244                  * already exists:
 245                  *    1) the Scope() operator can reopen a scoping object that was
 246                  *       previously defined (Scope, Method, Device, etc.)
 247                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 248                  *       buffer_field, or Package), the name of the object is already
 249                  *       in the namespace.
 250                  */
 251                 if (walk_state->deferred_node) {
 252                         /* This name is already in the namespace, get the node */
 253
 254                         node = walk_state->deferred_node;
 255                         status = AE_OK;
 256                         break;
 257                 }
 258
 259                 flags = ACPI_NS_NO_UPSEARCH;
 260                 if ((walk_state->opcode != AML_SCOPE_OP) &&
 261                         (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 262                         flags |= ACPI_NS_ERROR_IF_FOUND;
 263                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
 264                                         acpi_ut_get_type_name (object_type)));
 265                 }
 266                 else {
 267                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Both Find or Create allowed\n",
 268                                         acpi_ut_get_type_name (object_type)));
 269                 }
 270
 271                 /*
 272                  * Enter the named type into the internal namespace.  We enter the name
 273                  * as we go downward in the parse tree.  Any necessary subobjects that involve
 274                  * arguments to the opcode must be created as we go back up the parse tree later.
 275                  */
 276                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 277                                   ACPI_IMODE_LOAD_PASS1, flags, walk_state, &(node));
 278                 if (ACPI_FAILURE (status)) {
 279                         ACPI_REPORT_NSERROR (path, status);
 280                         return (status);
 281                 }
 282                 break;
 283         }
 284
 285
 286         /* Common exit */
 287
 288         if (!op) {
 289                 /* Create a new op */
 290
 291                 op = acpi_ps_alloc_op (walk_state->opcode);
 292                 if (!op) {
 293                         return (AE_NO_MEMORY);
 294                 }
 295         }
 296
 297         /* Initialize */
 298
 299         op->named.name = node->name.integer;
 300
 301 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 302         op->named.path = (u8 *) path;
 303 #endif
 304
 305
 306         /*
 307          * Put the Node in the "op" object that the parser uses, so we
 308          * can get it again quickly when this scope is closed
 309          */
 310         op->common.node = node;
 311         acpi_ps_append_arg (acpi_ps_get_parent_scope (&walk_state->parser_state), op);
 312
 313         *out_op = op;
 314         return (status);
 315 }
 316
 317
 318 /*******************************************************************************
 319  *
 320  * FUNCTION:    acpi_ds_load1_end_op
 321  *
 322  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 323  *              Op              - Op that has been just been completed in the
 324  *                                walk;  Arguments have now been evaluated.
 325  *
 326  * RETURN:      Status
 327  *
 328  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 329  *              both control methods and everything else.
 330  *
 331  ******************************************************************************/
 332
 333 acpi_status
 334 acpi_ds_load1_end_op (
 335         struct acpi_walk_state          *walk_state)
 336 {
 337         union acpi_parse_object         *op;
 338         acpi_object_type                object_type;
 339         acpi_status                     status = AE_OK;
 340
 341
 342         ACPI_FUNCTION_NAME ("ds_load1_end_op");
 343
 344
 345         op = walk_state->op;
 346         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 347
 348         /* We are only interested in opcodes that have an associated name */
 349
 350         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 351                 return (AE_OK);
 352         }
 353
 354         /* Get the object type to determine if we should pop the scope */
 355
 356         object_type = walk_state->op_info->object_type;
 357
 358 #ifndef ACPI_NO_METHOD_EXECUTION
 359         if (walk_state->op_info->flags & AML_FIELD) {
 360                 if (walk_state->opcode == AML_FIELD_OP         ||
 361                         walk_state->opcode == AML_BANK_FIELD_OP    ||
 362                         walk_state->opcode == AML_INDEX_FIELD_OP) {
 363                         status = acpi_ds_init_field_objects (op, walk_state);
 364                 }
 365                 return (status);
 366         }
 367
 368
 369         if (op->common.aml_opcode == AML_REGION_OP) {
 370                 status = acpi_ex_create_region (op->named.data, op->named.length,
 371                                    (acpi_adr_space_type) ((op->common.value.arg)->common.value.integer), walk_state);
 372                 if (ACPI_FAILURE (status)) {
 373                         return (status);
 374                 }
 375         }
 376 #endif
 377
 378         if (op->common.aml_opcode == AML_NAME_OP) {
 379                 /* For Name opcode, get the object type from the argument */
 380
 381                 if (op->common.value.arg) {
 382                         object_type = (acpi_ps_get_opcode_info ((op->common.value.arg)->common.aml_opcode))->object_type;
 383                         op->common.node->type = (u8) object_type;
 384                 }
 385         }
 386
 387         if (op->common.aml_opcode == AML_METHOD_OP) {
 388                 /*
 389                  * method_op pkg_length name_string method_flags term_list
 390                  *
 391                  * Note: We must create the method node/object pair as soon as we
 392                  * see the method declaration.  This allows later pass1 parsing
 393                  * of invocations of the method (need to know the number of
 394                  * arguments.)
 395                  */
 396                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 397                         "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 398                         walk_state, op, op->named.node));
 399
 400                 if (!acpi_ns_get_attached_object (op->named.node)) {
 401                         walk_state->operands[0] = (void *) op->named.node;
 402                         walk_state->num_operands = 1;
 403
 404                         status = acpi_ds_create_operands (walk_state, op->common.value.arg);
 405                         if (ACPI_SUCCESS (status)) {
 406                                 status = acpi_ex_create_method (op->named.data,
 407                                                    op->named.length, walk_state);
 408                         }
 409                         walk_state->operands[0] = NULL;
 410                         walk_state->num_operands = 0;
 411
 412                         if (ACPI_FAILURE (status)) {
 413                                 return (status);
 414                         }
 415                 }
 416         }
 417
 418         /* Pop the scope stack */
 419
 420         if (acpi_ns_opens_scope (object_type)) {
 421                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
 422                         acpi_ut_get_type_name (object_type), op));
 423
 424                 status = acpi_ds_scope_stack_pop (walk_state);
 425         }
 426
 427         return (status);
 428 }
 429
 430
 431 /*******************************************************************************
 432  *
 433  * FUNCTION:    acpi_ds_load2_begin_op
 434  *
 435  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 436  *              Op              - Op that has been just been reached in the
 437  *                                walk;  Arguments have not been evaluated yet.
 438  *
 439  * RETURN:      Status
 440  *
 441  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 442  *
 443  ******************************************************************************/
 444
 445 acpi_status
 446 acpi_ds_load2_begin_op (
 447         struct acpi_walk_state          *walk_state,
 448         union acpi_parse_object         **out_op)
 449 {
 450         union acpi_parse_object         *op;
 451         struct acpi_namespace_node      *node;
 452         acpi_status                     status;
 453         acpi_object_type                object_type;
 454         char                            *buffer_ptr;
 455
 456
 457         ACPI_FUNCTION_TRACE ("ds_load2_begin_op");
 458
 459
 460         op = walk_state->op;
 461         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 462
 463         if (op) {
 464                 /* We only care about Namespace opcodes here */
 465
 466                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) && (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 467                         (!(walk_state->op_info->flags & AML_NAMED))) {
 468                         return_ACPI_STATUS (AE_OK);
 469                 }
 470
 471                 /*
 472                  * Get the name we are going to enter or lookup in the namespace
 473                  */
 474                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 475                         /* For Namepath op, get the path string */
 476
 477                         buffer_ptr = op->common.value.string;
 478                         if (!buffer_ptr) {
 479                                 /* No name, just exit */
 480
 481                                 return_ACPI_STATUS (AE_OK);
 482                         }
 483                 }
 484                 else {
 485                         /* Get name from the op */
 486
 487                         buffer_ptr = (char *) &op->named.name;
 488                 }
 489         }
 490         else {
 491                 /* Get the namestring from the raw AML */
 492
 493                 buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
 494         }
 495
 496         /* Map the opcode into an internal object type */
 497
 498         object_type = walk_state->op_info->object_type;
 499
 500         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 501                 "State=%p Op=%p Type=%X\n", walk_state, op, object_type));
 502
 503
 504         switch (walk_state->opcode) {
 505         case AML_FIELD_OP:
 506         case AML_BANK_FIELD_OP:
 507         case AML_INDEX_FIELD_OP:
 508
 509                 node = NULL;
 510                 status = AE_OK;
 511                 break;
 512
 513         case AML_INT_NAMEPATH_OP:
 514
 515                 /*
 516                  * The name_path is an object reference to an existing object. Don't enter the
 517                  * name into the namespace, but look it up for use later
 518                  */
 519                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 520                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 521                 break;
 522
 523         case AML_SCOPE_OP:
 524
 525                 /*
 526                  * The Path is an object reference to an existing object.  Don't enter the
 527                  * name into the namespace, but look it up for use later
 528                  */
 529                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 530                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 531                 if (ACPI_FAILURE (status)) {
 532                         ACPI_REPORT_NSERROR (buffer_ptr, status);
 533                         return_ACPI_STATUS (status);
 534                 }
 535                 /*
 536                  * We must check to make sure that the target is
 537                  * one of the opcodes that actually opens a scope
 538                  */
 539                 switch (node->type) {
 540                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 541                 case ACPI_TYPE_DEVICE:
 542                 case ACPI_TYPE_POWER:
 543                 case ACPI_TYPE_PROCESSOR:
 544                 case ACPI_TYPE_THERMAL:
 545
 546                         /* These are acceptable types */
 547                         break;
 548
 549                 case ACPI_TYPE_INTEGER:
 550                 case ACPI_TYPE_STRING:
 551                 case ACPI_TYPE_BUFFER:
 552
 553                         /*
 554                          * These types we will allow, but we will change the type.  This
 555                          * enables some existing code of the form:
 556                          *
 557                          *  Name (DEB, 0)
 558                          *  Scope (DEB) { ... }
 559                          */
 560
 561                         ACPI_REPORT_WARNING (("Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 562                                 buffer_ptr, acpi_ut_get_type_name (node->type)));
 563
 564                         node->type = ACPI_TYPE_ANY;
 565                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 566                         break;
 567
 568                 default:
 569
 570                         /* All other types are an error */
 571
 572                         ACPI_REPORT_ERROR (("Invalid type (%s) for target of Scope operator [%4.4s]\n",
 573                                 acpi_ut_get_type_name (node->type), buffer_ptr));
 574
 575                         return (AE_AML_OPERAND_TYPE);
 576                 }
 577                 break;
 578
 579         default:
 580
 581                 /* All other opcodes */
 582
 583                 if (op && op->common.node) {
 584                         /* This op/node was previously entered into the namespace */
 585
 586                         node = op->common.node;
 587
 588                         if (acpi_ns_opens_scope (object_type)) {
 589                                 status = acpi_ds_scope_stack_push (node, object_type, walk_state);
 590                                 if (ACPI_FAILURE (status)) {
 591                                         return_ACPI_STATUS (status);
 592                                 }
 593
 594                         }
 595                         return_ACPI_STATUS (AE_OK);
 596                 }
 597
 598                 /*
 599                  * Enter the named type into the internal namespace.  We enter the name
 600                  * as we go downward in the parse tree.  Any necessary subobjects that involve
 601                  * arguments to the opcode must be created as we go back up the parse tree later.
 602                  *
 603                  * Note: Name may already exist if we are executing a deferred opcode.
 604                  */
 605                 if (walk_state->deferred_node) {
 606                         /* This name is already in the namespace, get the node */
 607
 608                         node = walk_state->deferred_node;
 609                         status = AE_OK;
 610                         break;
 611                 }
 612
 613                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 614                                   ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, walk_state, &(node));
 615                 break;
 616         }
 617
 618         if (ACPI_FAILURE (status)) {
 619                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 620                 return_ACPI_STATUS (status);
 621         }
 622
 623
 624         if (!op) {
 625                 /* Create a new op */
 626
 627                 op = acpi_ps_alloc_op (walk_state->opcode);
 628                 if (!op) {
 629                         return_ACPI_STATUS (AE_NO_MEMORY);
 630                 }
 631
 632                 /* Initialize the new op */
 633
 634                 if (node) {
 635                         op->named.name = node->name.integer;
 636                 }
 637                 if (out_op) {
 638                         *out_op = op;
 639                 }
 640         }
 641
 642         /*
 643          * Put the Node in the "op" object that the parser uses, so we
 644          * can get it again quickly when this scope is closed
 645          */
 646         op->common.node = node;
 647
 648         return_ACPI_STATUS (status);
 649 }
 650
 651
 652 /*******************************************************************************
 653  *
 654  * FUNCTION:    acpi_ds_load2_end_op
 655  *
 656  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 657  *              Op              - Op that has been just been completed in the
 658  *                                walk;  Arguments have now been evaluated.
 659  *
 660  * RETURN:      Status
 661  *
 662  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 663  *              both control methods and everything else.
 664  *
 665  ******************************************************************************/
 666
 667 acpi_status
 668 acpi_ds_load2_end_op (
 669         struct acpi_walk_state          *walk_state)
 670 {
 671         union acpi_parse_object         *op;
 672         acpi_status                     status = AE_OK;
 673         acpi_object_type                object_type;
 674         struct acpi_namespace_node      *node;
 675         union acpi_parse_object         *arg;
 676         struct acpi_namespace_node      *new_node;
 677 #ifndef ACPI_NO_METHOD_EXECUTION
 678         u32                             i;
 679 #endif
 680
 681
 682         ACPI_FUNCTION_TRACE ("ds_load2_end_op");
 683
 684         op = walk_state->op;
 685         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 686                         walk_state->op_info->name, op, walk_state));
 687
 688         /* Only interested in opcodes that have namespace objects */
 689
 690         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 691                 return_ACPI_STATUS (AE_OK);
 692         }
 693
 694         if (op->common.aml_opcode == AML_SCOPE_OP) {
 695                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 696                         "Ending scope Op=%p State=%p\n", op, walk_state));
 697         }
 698
 699
 700         object_type = walk_state->op_info->object_type;
 701
 702         /*
 703          * Get the Node/name from the earlier lookup
 704          * (It was saved in the *op structure)
 705          */
 706         node = op->common.node;
 707
 708         /*
 709          * Put the Node on the object stack (Contains the ACPI Name of
 710          * this object)
 711          */
 712         walk_state->operands[0] = (void *) node;
 713         walk_state->num_operands = 1;
 714
 715         /* Pop the scope stack */
 716
 717         if (acpi_ns_opens_scope (object_type) && (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 718                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 719                         acpi_ut_get_type_name (object_type), op));
 720
 721                 status = acpi_ds_scope_stack_pop (walk_state);
 722                 if (ACPI_FAILURE (status)) {
 723                         goto cleanup;
 724                 }
 725         }
 726
 727         /*
 728          * Named operations are as follows:
 729          *
 730          * AML_ALIAS
 731          * AML_BANKFIELD
 732          * AML_CREATEBITFIELD
 733          * AML_CREATEBYTEFIELD
 734          * AML_CREATEDWORDFIELD
 735          * AML_CREATEFIELD
 736          * AML_CREATEQWORDFIELD
 737          * AML_CREATEWORDFIELD
 738          * AML_DATA_REGION
 739          * AML_DEVICE
 740          * AML_EVENT
 741          * AML_FIELD
 742          * AML_INDEXFIELD
 743          * AML_METHOD
 744          * AML_METHODCALL
 745          * AML_MUTEX
 746          * AML_NAME
 747          * AML_NAMEDFIELD
 748          * AML_OPREGION
 749          * AML_POWERRES
 750          * AML_PROCESSOR
 751          * AML_SCOPE
 752          * AML_THERMALZONE
 753          */
 754
 755         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 756                 "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 757                 acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));
 758
 759         /* Decode the opcode */
 760
 761         arg = op->common.value.arg;
 762
 763         switch (walk_state->op_info->type) {
 764 #ifndef ACPI_NO_METHOD_EXECUTION
 765
 766         case AML_TYPE_CREATE_FIELD:
 767
 768                 /*
 769                  * Create the field object, but the field buffer and index must
 770                  * be evaluated later during the execution phase
 771                  */
 772                 status = acpi_ds_create_buffer_field (op, walk_state);
 773                 break;
 774
 775
 776          case AML_TYPE_NAMED_FIELD:
 777
 778                 switch (op->common.aml_opcode) {
 779                 case AML_INDEX_FIELD_OP:
 780
 781                         status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
 782                                            walk_state);
 783                         break;
 784
 785                 case AML_BANK_FIELD_OP:
 786
 787                         status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
 788                         break;
 789
 790                 case AML_FIELD_OP:
 791
 792                         status = acpi_ds_create_field (op, arg->common.node, walk_state);
 793                         break;
 794
 795                 default:
 796                         /* All NAMED_FIELD opcodes must be handled above */
 797                         break;
 798                 }
 799                 break;
 800
 801
 802          case AML_TYPE_NAMED_SIMPLE:
 803
 804                 status = acpi_ds_create_operands (walk_state, arg);
 805                 if (ACPI_FAILURE (status)) {
 806                         goto cleanup;
 807                 }
 808
 809                 switch (op->common.aml_opcode) {
 810                 case AML_PROCESSOR_OP:
 811
 812                         status = acpi_ex_create_processor (walk_state);
 813                         break;
 814
 815                 case AML_POWER_RES_OP:
 816
 817                         status = acpi_ex_create_power_resource (walk_state);
 818                         break;
 819
 820                 case AML_MUTEX_OP:
 821
 822                         status = acpi_ex_create_mutex (walk_state);
 823                         break;
 824
 825                 case AML_EVENT_OP:
 826
 827                         status = acpi_ex_create_event (walk_state);
 828                         break;
 829
 830                 case AML_DATA_REGION_OP:
 831
 832                         status = acpi_ex_create_table_region (walk_state);
 833                         break;
 834
 835                 case AML_ALIAS_OP:
 836
 837                         status = acpi_ex_create_alias (walk_state);
 838                         break;
 839
 840                 default:
 841                         /* Unknown opcode */
 842
 843                         status = AE_OK;
 844                         goto cleanup;
 845                 }
 846
 847                 /* Delete operands */
 848
 849                 for (i = 1; i < walk_state->num_operands; i++) {
 850                         acpi_ut_remove_reference (walk_state->operands[i]);
 851                         walk_state->operands[i] = NULL;
 852                 }
 853
 854                 break;
 855 #endif /* ACPI_NO_METHOD_EXECUTION */
 856
 857         case AML_TYPE_NAMED_COMPLEX:
 858
 859                 switch (op->common.aml_opcode) {
 860 #ifndef ACPI_NO_METHOD_EXECUTION
 861                 case AML_REGION_OP:
 862                         /*
 863                          * The op_region is not fully parsed at this time. Only valid argument is the space_id.
 864                          * (We must save the address of the AML of the address and length operands)
 865                          */
 866                         /*
 867                          * If we have a valid region, initialize it
 868                          * Namespace is NOT locked at this point.
 869                          */
 870                         status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node), FALSE);
 871                         if (ACPI_FAILURE (status)) {
 872                                 /*
 873                                  *  If AE_NOT_EXIST is returned, it is not fatal
 874                                  *  because many regions get created before a handler
 875                                  *  is installed for said region.
 876                                  */
 877                                 if (AE_NOT_EXIST == status) {
 878                                         status = AE_OK;
 879                                 }
 880                         }
 881                         break;
 882
 883
 884                 case AML_NAME_OP:
 885
 886                         status = acpi_ds_create_node (walk_state, node, op);
 887                         break;
 888 #endif /* ACPI_NO_METHOD_EXECUTION */
 889
 890
 891                 default:
 892                         /* All NAMED_COMPLEX opcodes must be handled above */
 893                         /* Note: Method objects were already created in Pass 1 */
 894                         break;
 895                 }
 896                 break;
 897
 898
 899         case AML_CLASS_INTERNAL:
 900
 901                 /* case AML_INT_NAMEPATH_OP: */
 902                 break;
 903
 904
 905         case AML_CLASS_METHOD_CALL:
 906
 907                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 908                         "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 909                         walk_state, op, node));
 910
 911                 /*
 912                  * Lookup the method name and save the Node
 913                  */
 914                 status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
 915                                   ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 916                                   ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 917                                   walk_state, &(new_node));
 918                 if (ACPI_SUCCESS (status)) {
 919                         /*
 920                          * Make sure that what we found is indeed a method
 921                          * We didn't search for a method on purpose, to see if the name would resolve
 922                          */
 923                         if (new_node->type != ACPI_TYPE_METHOD) {
 924                                 status = AE_AML_OPERAND_TYPE;
 925                         }
 926
 927                         /* We could put the returned object (Node) on the object stack for later, but
 928                          * for now, we will put it in the "op" object that the parser uses, so we
 929                          * can get it again at the end of this scope
 930                          */
 931                         op->common.node = new_node;
 932                 }
 933                 else {
 934                         ACPI_REPORT_NSERROR (arg->common.value.string, status);
 935                 }
 936                 break;
 937
 938
 939         default:
 940                 break;
 941         }
 942
 943 cleanup:
 944
 945         /* Remove the Node pushed at the very beginning */
 946
 947         walk_state->operands[0] = NULL;
 948         walk_state->num_operands = 0;
 949         return_ACPI_STATUS (status);
 950 }
 951
 952