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
  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 #ifdef ACPI_ASL_COMPILER
  54 #include <acpi/acdisasm.h>
  55 #endif
  56
  57 #define _COMPONENT          ACPI_DISPATCHER
  58          ACPI_MODULE_NAME    ("dswload")
  59
  60
  61 /*******************************************************************************
  62  *
  63  * FUNCTION:    acpi_ds_init_callbacks
  64  *
  65  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  66  *              pass_number     - 1, 2, or 3
  67  *
  68  * RETURN:      Status
  69  *
  70  * DESCRIPTION: Init walk state callbacks
  71  *
  72  ******************************************************************************/
  73
  74 acpi_status
  75 acpi_ds_init_callbacks (
  76         struct acpi_walk_state          *walk_state,
  77         u32                             pass_number)
  78 {
  79
  80         switch (pass_number) {
  81         case 1:
  82                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 |
  83                                    ACPI_PARSE_DELETE_TREE;
  84                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  85                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  86                 break;
  87
  88         case 2:
  89                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 |
  90                                    ACPI_PARSE_DELETE_TREE;
  91                 walk_state->descending_callback = acpi_ds_load2_begin_op;
  92                 walk_state->ascending_callback = acpi_ds_load2_end_op;
  93                 break;
  94
  95         case 3:
  96 #ifndef ACPI_NO_METHOD_EXECUTION
  97                 walk_state->parse_flags      |= ACPI_PARSE_EXECUTE  |
  98                                    ACPI_PARSE_DELETE_TREE;
  99                 walk_state->descending_callback = acpi_ds_exec_begin_op;
 100                 walk_state->ascending_callback = acpi_ds_exec_end_op;
 101 #endif
 102                 break;
 103
 104         default:
 105                 return (AE_BAD_PARAMETER);
 106         }
 107
 108         return (AE_OK);
 109 }
 110
 111
 112 /*******************************************************************************
 113  *
 114  * FUNCTION:    acpi_ds_load1_begin_op
 115  *
 116  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 117  *              out_op          - Where to return op if a new one is created
 118  *
 119  * RETURN:      Status
 120  *
 121  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 122  *
 123  ******************************************************************************/
 124
 125 acpi_status
 126 acpi_ds_load1_begin_op (
 127         struct acpi_walk_state          *walk_state,
 128         union acpi_parse_object         **out_op)
 129 {
 130         union acpi_parse_object         *op;
 131         struct acpi_namespace_node      *node;
 132         acpi_status                     status;
 133         acpi_object_type                object_type;
 134         char                            *path;
 135         u32                             flags;
 136
 137
 138         ACPI_FUNCTION_NAME ("ds_load1_begin_op");
 139
 140
 141         op = walk_state->op;
 142         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 143
 144         /* We are only interested in opcodes that have an associated name */
 145
 146         if (op) {
 147                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 148                         *out_op = op;
 149                         return (AE_OK);
 150                 }
 151
 152                 /* Check if this object has already been installed in the namespace */
 153
 154                 if (op->common.node) {
 155                         *out_op = op;
 156                         return (AE_OK);
 157                 }
 158         }
 159
 160         path = acpi_ps_get_next_namestring (&walk_state->parser_state);
 161
 162         /* Map the raw opcode into an internal object type */
 163
 164         object_type = walk_state->op_info->object_type;
 165
 166         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 167                 "State=%p Op=%p [%s]\n", walk_state, op, acpi_ut_get_type_name (object_type)));
 168
 169         switch (walk_state->opcode) {
 170         case AML_SCOPE_OP:
 171
 172                 /*
 173                  * The target name of the Scope() operator must exist at this point so
 174                  * that we can actually open the scope to enter new names underneath it.
 175                  * Allow search-to-root for single namesegs.
 176                  */
 177                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 178                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 179 #ifdef ACPI_ASL_COMPILER
 180                 if (status == AE_NOT_FOUND) {
 181                         /*
 182                          * Table disassembly:
 183                          * Target of Scope() not found.  Generate an External for it, and
 184                          * insert the name into the namespace.
 185                          */
 186                         acpi_dm_add_to_external_list (path);
 187                         status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 188                                            ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
 189                                            walk_state, &(node));
 190                 }
 191 #endif
 192                 if (ACPI_FAILURE (status)) {
 193                         ACPI_REPORT_NSERROR (path, status);
 194                         return (status);
 195                 }
 196
 197                 /*
 198                  * Check to make sure that the target is
 199                  * one of the opcodes that actually opens a scope
 200                  */
 201                 switch (node->type) {
 202                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
 203                 case ACPI_TYPE_DEVICE:
 204                 case ACPI_TYPE_POWER:
 205                 case ACPI_TYPE_PROCESSOR:
 206                 case ACPI_TYPE_THERMAL:
 207
 208                         /* These are acceptable types */
 209                         break;
 210
 211                 case ACPI_TYPE_INTEGER:
 212                 case ACPI_TYPE_STRING:
 213                 case ACPI_TYPE_BUFFER:
 214
 215                         /*
 216                          * These types we will allow, but we will change the type.  This
 217                          * enables some existing code of the form:
 218                          *
 219                          *  Name (DEB, 0)
 220                          *  Scope (DEB) { ... }
 221                          *
 222                          * Note: silently change the type here.  On the second pass, we will report
 223                          * a warning
 224                          */
 225
 226                         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 227                                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 228                                 path, acpi_ut_get_type_name (node->type)));
 229
 230                         node->type = ACPI_TYPE_ANY;
 231                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 232                         break;
 233
 234                 default:
 235
 236                         /* All other types are an error */
 237
 238                         ACPI_REPORT_ERROR ((
 239                                 "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n",
 240                                 acpi_ut_get_type_name (node->type), path));
 241
 242                         return (AE_AML_OPERAND_TYPE);
 243                 }
 244                 break;
 245
 246
 247         default:
 248
 249                 /*
 250                  * For all other named opcodes, we will enter the name into
 251                  * the namespace.
 252                  *
 253                  * Setup the search flags.
 254                  * Since we are entering a name into the namespace, we do not want to
 255                  * enable the search-to-root upsearch.
 256                  *
 257                  * There are only two conditions where it is acceptable that the name
 258                  * already exists:
 259                  *    1) the Scope() operator can reopen a scoping object that was
 260                  *       previously defined (Scope, Method, Device, etc.)
 261                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 262                  *       buffer_field, or Package), the name of the object is already
 263                  *       in the namespace.
 264                  */
 265                 if (walk_state->deferred_node) {
 266                         /* This name is already in the namespace, get the node */
 267
 268                         node = walk_state->deferred_node;
 269                         status = AE_OK;
 270                         break;
 271                 }
 272
 273                 flags = ACPI_NS_NO_UPSEARCH;
 274                 if ((walk_state->opcode != AML_SCOPE_OP) &&
 275                         (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 276                         flags |= ACPI_NS_ERROR_IF_FOUND;
 277                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
 278                                         acpi_ut_get_type_name (object_type)));
 279                 }
 280                 else {
 281                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 282                                 "[%s] Both Find or Create allowed\n",
 283                                         acpi_ut_get_type_name (object_type)));
 284                 }
 285
 286                 /*
 287                  * Enter the named type into the internal namespace.  We enter the name
 288                  * as we go downward in the parse tree.  Any necessary subobjects that
 289                  * involve arguments to the opcode must be created as we go back up the
 290                  * parse tree later.
 291                  */
 292                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 293                                   ACPI_IMODE_LOAD_PASS1, flags, walk_state, &(node));
 294                 if (ACPI_FAILURE (status)) {
 295                         ACPI_REPORT_NSERROR (path, status);
 296                         return (status);
 297                 }
 298                 break;
 299         }
 300
 301
 302         /* Common exit */
 303
 304         if (!op) {
 305                 /* Create a new op */
 306
 307                 op = acpi_ps_alloc_op (walk_state->opcode);
 308                 if (!op) {
 309                         return (AE_NO_MEMORY);
 310                 }
 311         }
 312
 313         /* Initialize */
 314
 315         op->named.name = node->name.integer;
 316
 317 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 318         op->named.path = (u8 *) path;
 319 #endif
 320
 321
 322         /*
 323          * Put the Node in the "op" object that the parser uses, so we
 324          * can get it again quickly when this scope is closed
 325          */
 326         op->common.node = node;
 327         acpi_ps_append_arg (acpi_ps_get_parent_scope (&walk_state->parser_state), op);
 328
 329         *out_op = op;
 330         return (status);
 331 }
 332
 333
 334 /*******************************************************************************
 335  *
 336  * FUNCTION:    acpi_ds_load1_end_op
 337  *
 338  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 339  *
 340  * RETURN:      Status
 341  *
 342  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 343  *              both control methods and everything else.
 344  *
 345  ******************************************************************************/
 346
 347 acpi_status
 348 acpi_ds_load1_end_op (
 349         struct acpi_walk_state          *walk_state)
 350 {
 351         union acpi_parse_object         *op;
 352         acpi_object_type                object_type;
 353         acpi_status                     status = AE_OK;
 354
 355
 356         ACPI_FUNCTION_NAME ("ds_load1_end_op");
 357
 358
 359         op = walk_state->op;
 360         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 361
 362         /* We are only interested in opcodes that have an associated name */
 363
 364         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 365                 return (AE_OK);
 366         }
 367
 368         /* Get the object type to determine if we should pop the scope */
 369
 370         object_type = walk_state->op_info->object_type;
 371
 372 #ifndef ACPI_NO_METHOD_EXECUTION
 373         if (walk_state->op_info->flags & AML_FIELD) {
 374                 if (walk_state->opcode == AML_FIELD_OP         ||
 375                         walk_state->opcode == AML_BANK_FIELD_OP    ||
 376                         walk_state->opcode == AML_INDEX_FIELD_OP) {
 377                         status = acpi_ds_init_field_objects (op, walk_state);
 378                 }
 379                 return (status);
 380         }
 381
 382
 383         if (op->common.aml_opcode == AML_REGION_OP) {
 384                 status = acpi_ex_create_region (op->named.data, op->named.length,
 385                                    (acpi_adr_space_type)
 386                                                  ((op->common.value.arg)->common.value.integer),
 387                                                  walk_state);
 388                 if (ACPI_FAILURE (status)) {
 389                         return (status);
 390                 }
 391         }
 392 #endif
 393
 394         if (op->common.aml_opcode == AML_NAME_OP) {
 395                 /* For Name opcode, get the object type from the argument */
 396
 397                 if (op->common.value.arg) {
 398                         object_type = (acpi_ps_get_opcode_info (
 399                                 (op->common.value.arg)->common.aml_opcode))->object_type;
 400                         op->common.node->type = (u8) object_type;
 401                 }
 402         }
 403
 404         if (op->common.aml_opcode == AML_METHOD_OP) {
 405                 /*
 406                  * method_op pkg_length name_string method_flags term_list
 407                  *
 408                  * Note: We must create the method node/object pair as soon as we
 409                  * see the method declaration.  This allows later pass1 parsing
 410                  * of invocations of the method (need to know the number of
 411                  * arguments.)
 412                  */
 413                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 414                         "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 415                         walk_state, op, op->named.node));
 416
 417                 if (!acpi_ns_get_attached_object (op->named.node)) {
 418                         walk_state->operands[0] = (void *) op->named.node;
 419                         walk_state->num_operands = 1;
 420
 421                         status = acpi_ds_create_operands (walk_state, op->common.value.arg);
 422                         if (ACPI_SUCCESS (status)) {
 423                                 status = acpi_ex_create_method (op->named.data,
 424                                                    op->named.length, walk_state);
 425                         }
 426                         walk_state->operands[0] = NULL;
 427                         walk_state->num_operands = 0;
 428
 429                         if (ACPI_FAILURE (status)) {
 430                                 return (status);
 431                         }
 432                 }
 433         }
 434
 435         /* Pop the scope stack */
 436
 437         if (acpi_ns_opens_scope (object_type)) {
 438                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
 439                         acpi_ut_get_type_name (object_type), op));
 440
 441                 status = acpi_ds_scope_stack_pop (walk_state);
 442         }
 443
 444         return (status);
 445 }
 446
 447
 448 /*******************************************************************************
 449  *
 450  * FUNCTION:    acpi_ds_load2_begin_op
 451  *
 452  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 453  *              out_op          - Wher to return op if a new one is created
 454  *
 455  * RETURN:      Status
 456  *
 457  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 458  *
 459  ******************************************************************************/
 460
 461 acpi_status
 462 acpi_ds_load2_begin_op (
 463         struct acpi_walk_state          *walk_state,
 464         union acpi_parse_object         **out_op)
 465 {
 466         union acpi_parse_object         *op;
 467         struct acpi_namespace_node      *node;
 468         acpi_status                     status;
 469         acpi_object_type                object_type;
 470         char                            *buffer_ptr;
 471
 472
 473         ACPI_FUNCTION_TRACE ("ds_load2_begin_op");
 474
 475
 476         op = walk_state->op;
 477         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 478
 479         if (op) {
 480                 if ((walk_state->control_state) &&
 481                         (walk_state->control_state->common.state ==
 482                                 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 483                         /* We are executing a while loop outside of a method */
 484
 485                         status = acpi_ds_exec_begin_op (walk_state, out_op);
 486                         return_ACPI_STATUS (status);
 487                 }
 488
 489                 /* We only care about Namespace opcodes here */
 490
 491                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 492                           (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 493                         (!(walk_state->op_info->flags & AML_NAMED))) {
 494                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 495                                 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 496                                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 497                                         "Begin/EXEC: %s (fl %8.8X)\n", walk_state->op_info->name,
 498                                         walk_state->op_info->flags));
 499
 500                                 /* Executing a type1 or type2 opcode outside of a method */
 501
 502                                 status = acpi_ds_exec_begin_op (walk_state, out_op);
 503                                 return_ACPI_STATUS (status);
 504                         }
 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                 }
 520                 else {
 521                         /* Get name from the op */
 522
 523                         buffer_ptr = (char *) &op->named.name;
 524                 }
 525         }
 526         else {
 527                 /* Get the namestring from the raw AML */
 528
 529                 buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
 530         }
 531
 532         /* Map the opcode into an internal object type */
 533
 534         object_type = walk_state->op_info->object_type;
 535
 536         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 537                 "State=%p Op=%p Type=%X\n", walk_state, op, object_type));
 538
 539
 540         switch (walk_state->opcode) {
 541         case AML_FIELD_OP:
 542         case AML_BANK_FIELD_OP:
 543         case AML_INDEX_FIELD_OP:
 544
 545                 node = NULL;
 546                 status = AE_OK;
 547                 break;
 548
 549         case AML_INT_NAMEPATH_OP:
 550
 551                 /*
 552                  * The name_path is an object reference to an existing object.
 553                  * Don't enter the name into the namespace, but look it up
 554                  * for use later.
 555                  */
 556                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 557                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 558                                   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 = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 569                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 570                                   walk_state, &(node));
 571                 if (ACPI_FAILURE (status)) {
 572 #ifdef ACPI_ASL_COMPILER
 573                         if (status == AE_NOT_FOUND) {
 574                                 status = AE_OK;
 575                         }
 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 ((
 611                                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 612                                 buffer_ptr, acpi_ut_get_type_name (node->type)));
 613
 614                         node->type = ACPI_TYPE_ANY;
 615                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 616                         break;
 617
 618                 default:
 619
 620                         /* All other types are an error */
 621
 622                         ACPI_REPORT_ERROR ((
 623                                 "Invalid type (%s) for target of Scope operator [%4.4s]\n",
 624                                 acpi_ut_get_type_name (node->type), buffer_ptr));
 625
 626                         return (AE_AML_OPERAND_TYPE);
 627                 }
 628                 break;
 629
 630         default:
 631
 632                 /* All other opcodes */
 633
 634                 if (op && op->common.node) {
 635                         /* This op/node was previously entered into the namespace */
 636
 637                         node = op->common.node;
 638
 639                         if (acpi_ns_opens_scope (object_type)) {
 640                                 status = acpi_ds_scope_stack_push (node, object_type, walk_state);
 641                                 if (ACPI_FAILURE (status)) {
 642                                         return_ACPI_STATUS (status);
 643                                 }
 644
 645                         }
 646                         return_ACPI_STATUS (AE_OK);
 647                 }
 648
 649                 /*
 650                  * Enter the named type into the internal namespace.  We enter the name
 651                  * as we go downward in the parse tree.  Any necessary subobjects that
 652                  * involve arguments to the opcode must be created as we go back up the
 653                  * parse tree later.
 654                  *
 655                  * Note: Name may already exist if we are executing a deferred opcode.
 656                  */
 657                 if (walk_state->deferred_node) {
 658                         /* This name is already in the namespace, get the node */
 659
 660                         node = walk_state->deferred_node;
 661                         status = AE_OK;
 662                         break;
 663                 }
 664
 665                 /* Add new entry into namespace */
 666
 667                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 668                                   ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH,
 669                                   walk_state, &(node));
 670                 break;
 671         }
 672
 673         if (ACPI_FAILURE (status)) {
 674                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 675                 return_ACPI_STATUS (status);
 676         }
 677
 678         if (!op) {
 679                 /* Create a new op */
 680
 681                 op = acpi_ps_alloc_op (walk_state->opcode);
 682                 if (!op) {
 683                         return_ACPI_STATUS (AE_NO_MEMORY);
 684                 }
 685
 686                 /* Initialize the new op */
 687
 688                 if (node) {
 689                         op->named.name = node->name.integer;
 690                 }
 691                 *out_op = op;
 692         }
 693
 694         /*
 695          * Put the Node in the "op" object that the parser uses, so we
 696          * can get it again quickly when this scope is closed
 697          */
 698         op->common.node = node;
 699
 700         return_ACPI_STATUS (status);
 701 }
 702
 703
 704 /*******************************************************************************
 705  *
 706  * FUNCTION:    acpi_ds_load2_end_op
 707  *
 708  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 709  *
 710  * RETURN:      Status
 711  *
 712  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 713  *              both control methods and everything else.
 714  *
 715  ******************************************************************************/
 716
 717 acpi_status
 718 acpi_ds_load2_end_op (
 719         struct acpi_walk_state          *walk_state)
 720 {
 721         union acpi_parse_object         *op;
 722         acpi_status                     status = AE_OK;
 723         acpi_object_type                object_type;
 724         struct acpi_namespace_node      *node;
 725         union acpi_parse_object         *arg;
 726         struct acpi_namespace_node      *new_node;
 727 #ifndef ACPI_NO_METHOD_EXECUTION
 728         u32                             i;
 729 #endif
 730
 731
 732         ACPI_FUNCTION_TRACE ("ds_load2_end_op");
 733
 734         op = walk_state->op;
 735         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 736                         walk_state->op_info->name, op, walk_state));
 737
 738         /* Check if opcode had an associated namespace object */
 739
 740         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 741 #ifndef ACPI_NO_METHOD_EXECUTION
 742                 /* No namespace object. Executable opcode? */
 743
 744                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 745                         (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 746                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 747                                 "End/EXEC:   %s (fl %8.8X)\n", walk_state->op_info->name,
 748                                 walk_state->op_info->flags));
 749
 750                         /* Executing a type1 or type2 opcode outside of a method */
 751
 752                         status = acpi_ds_exec_end_op (walk_state);
 753                         return_ACPI_STATUS (status);
 754                 }
 755 #endif
 756                 return_ACPI_STATUS (AE_OK);
 757         }
 758
 759         if (op->common.aml_opcode == AML_SCOPE_OP) {
 760                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 761                         "Ending scope Op=%p State=%p\n", op, walk_state));
 762         }
 763
 764         object_type = walk_state->op_info->object_type;
 765
 766         /*
 767          * Get the Node/name from the earlier lookup
 768          * (It was saved in the *op structure)
 769          */
 770         node = op->common.node;
 771
 772         /*
 773          * Put the Node on the object stack (Contains the ACPI Name of
 774          * this object)
 775          */
 776         walk_state->operands[0] = (void *) node;
 777         walk_state->num_operands = 1;
 778
 779         /* Pop the scope stack */
 780
 781         if (acpi_ns_opens_scope (object_type) &&
 782            (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 783                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%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), walk_state, op, node));
 823
 824         /* Decode the opcode */
 825
 826         arg = op->common.value.arg;
 827
 828         switch (walk_state->op_info->type) {
 829 #ifndef ACPI_NO_METHOD_EXECUTION
 830
 831         case AML_TYPE_CREATE_FIELD:
 832
 833                 /*
 834                  * Create the field object, but the field buffer and index must
 835                  * be evaluated later during the execution phase
 836                  */
 837                 status = acpi_ds_create_buffer_field (op, walk_state);
 838                 break;
 839
 840
 841          case AML_TYPE_NAMED_FIELD:
 842
 843                 switch (op->common.aml_opcode) {
 844                 case AML_INDEX_FIELD_OP:
 845
 846                         status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
 847                                          walk_state);
 848                         break;
 849
 850                 case AML_BANK_FIELD_OP:
 851
 852                         status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
 853                         break;
 854
 855                 case AML_FIELD_OP:
 856
 857                         status = acpi_ds_create_field (op, arg->common.node, walk_state);
 858                         break;
 859
 860                 default:
 861                         /* All NAMED_FIELD opcodes must be handled above */
 862                         break;
 863                 }
 864                 break;
 865
 866
 867          case AML_TYPE_NAMED_SIMPLE:
 868
 869                 status = acpi_ds_create_operands (walk_state, arg);
 870                 if (ACPI_FAILURE (status)) {
 871                         goto cleanup;
 872                 }
 873
 874                 switch (op->common.aml_opcode) {
 875                 case AML_PROCESSOR_OP:
 876
 877                         status = acpi_ex_create_processor (walk_state);
 878                         break;
 879
 880                 case AML_POWER_RES_OP:
 881
 882                         status = acpi_ex_create_power_resource (walk_state);
 883                         break;
 884
 885                 case AML_MUTEX_OP:
 886
 887                         status = acpi_ex_create_mutex (walk_state);
 888                         break;
 889
 890                 case AML_EVENT_OP:
 891
 892                         status = acpi_ex_create_event (walk_state);
 893                         break;
 894
 895                 case AML_DATA_REGION_OP:
 896
 897                         status = acpi_ex_create_table_region (walk_state);
 898                         break;
 899
 900                 case AML_ALIAS_OP:
 901
 902                         status = acpi_ex_create_alias (walk_state);
 903                         break;
 904
 905                 default:
 906                         /* Unknown opcode */
 907
 908                         status = AE_OK;
 909                         goto cleanup;
 910                 }
 911
 912                 /* Delete operands */
 913
 914                 for (i = 1; i < walk_state->num_operands; i++) {
 915                         acpi_ut_remove_reference (walk_state->operands[i]);
 916                         walk_state->operands[i] = NULL;
 917                 }
 918
 919                 break;
 920 #endif /* ACPI_NO_METHOD_EXECUTION */
 921
 922         case AML_TYPE_NAMED_COMPLEX:
 923
 924                 switch (op->common.aml_opcode) {
 925 #ifndef ACPI_NO_METHOD_EXECUTION
 926                 case AML_REGION_OP:
 927                         /*
 928                          * The op_region is not fully parsed at this time. Only valid
 929                          * argument is the space_id. (We must save the address of the
 930                          * AML of the address and length operands)
 931                          */
 932                         /*
 933                          * If we have a valid region, initialize it
 934                          * Namespace is NOT locked at this point.
 935                          */
 936                         status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node),
 937                                          FALSE);
 938                         if (ACPI_FAILURE (status)) {
 939                                 /*
 940                                  *  If AE_NOT_EXIST is returned, it is not fatal
 941                                  *  because many regions get created before a handler
 942                                  *  is installed for said region.
 943                                  */
 944                                 if (AE_NOT_EXIST == status) {
 945                                         status = AE_OK;
 946                                 }
 947                         }
 948                         break;
 949
 950
 951                 case AML_NAME_OP:
 952
 953                         status = acpi_ds_create_node (walk_state, node, op);
 954                         break;
 955 #endif /* ACPI_NO_METHOD_EXECUTION */
 956
 957
 958                 default:
 959                         /* All NAMED_COMPLEX opcodes must be handled above */
 960                         /* Note: Method objects were already created in Pass 1 */
 961                         break;
 962                 }
 963                 break;
 964
 965
 966         case AML_CLASS_INTERNAL:
 967
 968                 /* case AML_INT_NAMEPATH_OP: */
 969                 break;
 970
 971
 972         case AML_CLASS_METHOD_CALL:
 973
 974                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 975                         "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 976                         walk_state, op, node));
 977
 978                 /*
 979                  * Lookup the method name and save the Node
 980                  */
 981                 status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
 982                                   ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 983                                   ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 984                                   walk_state, &(new_node));
 985                 if (ACPI_SUCCESS (status)) {
 986
 987                         /*
 988                          * Make sure that what we found is indeed a method
 989                          * We didn't search for a method on purpose, to see if the name
 990                          * would resolve
 991                          */
 992                         if (new_node->type != ACPI_TYPE_METHOD) {
 993                                 status = AE_AML_OPERAND_TYPE;
 994                         }
 995
 996                         /* We could put the returned object (Node) on the object stack for
 997                          * later, but for now, we will put it in the "op" object that the
 998                          * parser uses, so we can get it again at the end of this scope
 999                          */
1000                         op->common.node = new_node;
1001                 }
1002                 else {
1003                         ACPI_REPORT_NSERROR (arg->common.value.string, status);
1004                 }
1005                 break;
1006
1007
1008         default:
1009                 break;
1010         }
1011
1012 cleanup:
1013
1014         /* Remove the Node pushed at the very beginning */
1015
1016         walk_state->operands[0] = NULL;
1017         walk_state->num_operands = 0;
1018         return_ACPI_STATUS (status);
1019 }
1020
1021