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