git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/dispatcher/dswload.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload - Dispatcher namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include <acpi/acparser.h>
  46 #include <acpi/amlcode.h>
  47 #include <acpi/acdispat.h>
  48 #include <acpi/acinterp.h>
  49 #include <acpi/acnamesp.h>
  50 #include <acpi/acevents.h>
  51
  52 #ifdef ACPI_ASL_COMPILER
  53 #include <acpi/acdisasm.h>
  54 #endif
  55
  56 #define _COMPONENT          ACPI_DISPATCHER
  57 ACPI_MODULE_NAME("dswload")
  58
  59 /*******************************************************************************
  60  *
  61  * FUNCTION:    acpi_ds_init_callbacks
  62  *
  63  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  64  *              pass_number     - 1, 2, or 3
  65  *
  66  * RETURN:      Status
  67  *
  68  * DESCRIPTION: Init walk state callbacks
  69  *
  70  ******************************************************************************/
  71 acpi_status
  72 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
  73 {
  74
  75         switch (pass_number) {
  76         case 1:
  77                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
  78                     ACPI_PARSE_DELETE_TREE;
  79                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  80                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  81                 break;
  82
  83         case 2:
  84                 walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
  85                     ACPI_PARSE_DELETE_TREE;
  86                 walk_state->descending_callback = acpi_ds_load2_begin_op;
  87                 walk_state->ascending_callback = acpi_ds_load2_end_op;
  88                 break;
  89
  90         case 3:
  91 #ifndef ACPI_NO_METHOD_EXECUTION
  92                 walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
  93                     ACPI_PARSE_DELETE_TREE;
  94                 walk_state->descending_callback = acpi_ds_exec_begin_op;
  95                 walk_state->ascending_callback = acpi_ds_exec_end_op;
  96 #endif
  97                 break;
  98
  99         default:
 100                 return (AE_BAD_PARAMETER);
 101         }
 102
 103         return (AE_OK);
 104 }
 105
 106 /*******************************************************************************
 107  *
 108  * FUNCTION:    acpi_ds_load1_begin_op
 109  *
 110  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 111  *              out_op          - Where to return op if a new one is created
 112  *
 113  * RETURN:      Status
 114  *
 115  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 116  *
 117  ******************************************************************************/
 118
 119 acpi_status
 120 acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
 121                        union acpi_parse_object ** out_op)
 122 {
 123         union acpi_parse_object *op;
 124         struct acpi_namespace_node *node;
 125         acpi_status status;
 126         acpi_object_type object_type;
 127         char *path;
 128         u32 flags;
 129
 130         ACPI_FUNCTION_TRACE("ds_load1_begin_op");
 131
 132         op = walk_state->op;
 133         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 134                           walk_state));
 135
 136         /* We are only interested in opcodes that have an associated name */
 137
 138         if (op) {
 139                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 140                         *out_op = op;
 141                         return_ACPI_STATUS(AE_OK);
 142                 }
 143
 144                 /* Check if this object has already been installed in the namespace */
 145
 146                 if (op->common.node) {
 147                         *out_op = op;
 148                         return_ACPI_STATUS(AE_OK);
 149                 }
 150         }
 151
 152         path = acpi_ps_get_next_namestring(&walk_state->parser_state);
 153
 154         /* Map the raw opcode into an internal object type */
 155
 156         object_type = walk_state->op_info->object_type;
 157
 158         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 159                           "State=%p Op=%p [%s]\n", walk_state, op,
 160                           acpi_ut_get_type_name(object_type)));
 161
 162         switch (walk_state->opcode) {
 163         case AML_SCOPE_OP:
 164
 165                 /*
 166                  * The target name of the Scope() operator must exist at this point so
 167                  * that we can actually open the scope to enter new names underneath it.
 168                  * Allow search-to-root for single namesegs.
 169                  */
 170                 status =
 171                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
 172                                    ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 173                                    walk_state, &(node));
 174 #ifdef ACPI_ASL_COMPILER
 175                 if (status == AE_NOT_FOUND) {
 176                         /*
 177                          * Table disassembly:
 178                          * Target of Scope() not found.  Generate an External for it, and
 179                          * insert the name into the namespace.
 180                          */
 181                         acpi_dm_add_to_external_list(path);
 182                         status =
 183                             acpi_ns_lookup(walk_state->scope_info, path,
 184                                            object_type, ACPI_IMODE_LOAD_PASS1,
 185                                            ACPI_NS_SEARCH_PARENT, walk_state,
 186                                            &(node));
 187                 }
 188 #endif
 189                 if (ACPI_FAILURE(status)) {
 190                         ACPI_ERROR_NAMESPACE(path, status);
 191                         return_ACPI_STATUS(status);
 192                 }
 193
 194                 /*
 195                  * Check to make sure that the target is
 196                  * one of the opcodes that actually opens a scope
 197                  */
 198                 switch (node->type) {
 199                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope  */
 200                 case ACPI_TYPE_DEVICE:
 201                 case ACPI_TYPE_POWER:
 202                 case ACPI_TYPE_PROCESSOR:
 203                 case ACPI_TYPE_THERMAL:
 204
 205                         /* These are acceptable types */
 206                         break;
 207
 208                 case ACPI_TYPE_INTEGER:
 209                 case ACPI_TYPE_STRING:
 210                 case ACPI_TYPE_BUFFER:
 211
 212                         /*
 213                          * These types we will allow, but we will change the type.  This
 214                          * enables some existing code of the form:
 215                          *
 216                          *  Name (DEB, 0)
 217                          *  Scope (DEB) { ... }
 218                          *
 219                          * Note: silently change the type here.  On the second pass, we will report
 220                          * a warning
 221                          */
 222
 223                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 224                                           "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 225                                           path,
 226                                           acpi_ut_get_type_name(node->type)));
 227
 228                         node->type = ACPI_TYPE_ANY;
 229                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 230                         break;
 231
 232                 default:
 233
 234                         /* All other types are an error */
 235
 236                         ACPI_ERROR((AE_INFO,
 237                                     "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
 238                                     acpi_ut_get_type_name(node->type), path));
 239
 240                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 241                 }
 242                 break;
 243
 244         default:
 245
 246                 /*
 247                  * For all other named opcodes, we will enter the name into
 248                  * the namespace.
 249                  *
 250                  * Setup the search flags.
 251                  * Since we are entering a name into the namespace, we do not want to
 252                  * enable the search-to-root upsearch.
 253                  *
 254                  * There are only two conditions where it is acceptable that the name
 255                  * already exists:
 256                  *    1) the Scope() operator can reopen a scoping object that was
 257                  *       previously defined (Scope, Method, Device, etc.)
 258                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 259                  *       buffer_field, or Package), the name of the object is already
 260                  *       in the namespace.
 261                  */
 262
 263                 if (walk_state->deferred_node) {
 264
 265                         /* This name is already in the namespace, get the node */
 266
 267                         node = walk_state->deferred_node;
 268                         status = AE_OK;
 269                         break;
 270                 }
 271
 272                 /*
 273                  * If we are executing a method, do not create any namespace objects
 274                  * during the load phase, only during execution.
 275                  */
 276                 if (walk_state->method_node) {
 277                         node = NULL;
 278                         status = AE_OK;
 279                         break;
 280                 }
 281
 282                 flags = ACPI_NS_NO_UPSEARCH;
 283                 if ((walk_state->opcode != AML_SCOPE_OP) &&
 284                     (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 285                         flags |= ACPI_NS_ERROR_IF_FOUND;
 286                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 287                                           "[%s] Cannot already exist\n",
 288                                           acpi_ut_get_type_name(object_type)));
 289                 } else {
 290                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 291                                           "[%s] Both Find or Create allowed\n",
 292                                           acpi_ut_get_type_name(object_type)));
 293                 }
 294
 295                 /*
 296                  * Enter the named type into the internal namespace.  We enter the name
 297                  * as we go downward in the parse tree.  Any necessary subobjects that
 298                  * involve arguments to the opcode must be created as we go back up the
 299                  * parse tree later.
 300                  */
 301                 status =
 302                     acpi_ns_lookup(walk_state->scope_info, path, object_type,
 303                                    ACPI_IMODE_LOAD_PASS1, flags, walk_state,
 304                                    &(node));
 305                 if (ACPI_FAILURE(status)) {
 306                         ACPI_ERROR_NAMESPACE(path, status);
 307                         return_ACPI_STATUS(status);
 308                 }
 309                 break;
 310         }
 311
 312         /* Common exit */
 313
 314         if (!op) {
 315
 316                 /* Create a new op */
 317
 318                 op = acpi_ps_alloc_op(walk_state->opcode);
 319                 if (!op) {
 320                         return_ACPI_STATUS(AE_NO_MEMORY);
 321                 }
 322         }
 323
 324         /* Initialize the op */
 325
 326 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 327         op->named.path = ACPI_CAST_PTR(u8, path);
 328 #endif
 329
 330         if (node) {
 331                 /*
 332                  * Put the Node in the "op" object that the parser uses, so we
 333                  * can get it again quickly when this scope is closed
 334                  */
 335                 op->common.node = node;
 336                 op->named.name = node->name.integer;
 337         }
 338
 339         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
 340                            op);
 341         *out_op = op;
 342         return_ACPI_STATUS(status);
 343 }
 344
 345 /*******************************************************************************
 346  *
 347  * FUNCTION:    acpi_ds_load1_end_op
 348  *
 349  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 350  *
 351  * RETURN:      Status
 352  *
 353  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 354  *              both control methods and everything else.
 355  *
 356  ******************************************************************************/
 357
 358 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
 359 {
 360         union acpi_parse_object *op;
 361         acpi_object_type object_type;
 362         acpi_status status = AE_OK;
 363
 364         ACPI_FUNCTION_TRACE("ds_load1_end_op");
 365
 366         op = walk_state->op;
 367         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 368                           walk_state));
 369
 370         /* We are only interested in opcodes that have an associated name */
 371
 372         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 373                 return_ACPI_STATUS(AE_OK);
 374         }
 375
 376         /* Get the object type to determine if we should pop the scope */
 377
 378         object_type = walk_state->op_info->object_type;
 379
 380 #ifndef ACPI_NO_METHOD_EXECUTION
 381         if (walk_state->op_info->flags & AML_FIELD) {
 382                 /*
 383                  * If we are executing a method, do not create any namespace objects
 384                  * during the load phase, only during execution.
 385                  */
 386                 if (!walk_state->method_node) {
 387                         if (walk_state->opcode == AML_FIELD_OP ||
 388                             walk_state->opcode == AML_BANK_FIELD_OP ||
 389                             walk_state->opcode == AML_INDEX_FIELD_OP) {
 390                                 status =
 391                                     acpi_ds_init_field_objects(op, walk_state);
 392                         }
 393                 }
 394                 return_ACPI_STATUS(status);
 395         }
 396
 397         /*
 398          * If we are executing a method, do not create any namespace objects
 399          * during the load phase, only during execution.
 400          */
 401         if (!walk_state->method_node) {
 402                 if (op->common.aml_opcode == AML_REGION_OP) {
 403                         status =
 404                             acpi_ex_create_region(op->named.data,
 405                                                   op->named.length,
 406                                                   (acpi_adr_space_type)
 407                                                   ((op->common.value.arg)->
 408                                                    common.value.integer),
 409                                                   walk_state);
 410                         if (ACPI_FAILURE(status)) {
 411                                 return_ACPI_STATUS(status);
 412                         }
 413                 }
 414         }
 415 #endif
 416
 417         if (op->common.aml_opcode == AML_NAME_OP) {
 418
 419                 /* For Name opcode, get the object type from the argument */
 420
 421                 if (op->common.value.arg) {
 422                         object_type = (acpi_ps_get_opcode_info((op->common.
 423                                                                 value.arg)->
 424                                                                common.
 425                                                                aml_opcode))->
 426                             object_type;
 427
 428                         /* Set node type if we have a namespace node */
 429
 430                         if (op->common.node) {
 431                                 op->common.node->type = (u8) object_type;
 432                         }
 433                 }
 434         }
 435
 436         /*
 437          * If we are executing a method, do not create any namespace objects
 438          * during the load phase, only during execution.
 439          */
 440         if (!walk_state->method_node) {
 441                 if (op->common.aml_opcode == AML_METHOD_OP) {
 442                         /*
 443                          * method_op pkg_length name_string method_flags term_list
 444                          *
 445                          * Note: We must create the method node/object pair as soon as we
 446                          * see the method declaration.  This allows later pass1 parsing
 447                          * of invocations of the method (need to know the number of
 448                          * arguments.)
 449                          */
 450                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 451                                           "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 452                                           walk_state, op, op->named.node));
 453
 454                         if (!acpi_ns_get_attached_object(op->named.node)) {
 455                                 walk_state->operands[0] =
 456                                     ACPI_CAST_PTR(void, op->named.node);
 457                                 walk_state->num_operands = 1;
 458
 459                                 status =
 460                                     acpi_ds_create_operands(walk_state,
 461                                                             op->common.value.
 462                                                             arg);
 463                                 if (ACPI_SUCCESS(status)) {
 464                                         status =
 465                                             acpi_ex_create_method(op->named.
 466                                                                   data,
 467                                                                   op->named.
 468                                                                   length,
 469                                                                   walk_state);
 470                                 }
 471                                 walk_state->operands[0] = NULL;
 472                                 walk_state->num_operands = 0;
 473
 474                                 if (ACPI_FAILURE(status)) {
 475                                         return_ACPI_STATUS(status);
 476                                 }
 477                         }
 478                 }
 479         }
 480
 481         /* Pop the scope stack (only if loading a table) */
 482
 483         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
 484                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 485                                   "(%s): Popping scope for Op %p\n",
 486                                   acpi_ut_get_type_name(object_type), op));
 487
 488                 status = acpi_ds_scope_stack_pop(walk_state);
 489         }
 490
 491         return_ACPI_STATUS(status);
 492 }
 493
 494 /*******************************************************************************
 495  *
 496  * FUNCTION:    acpi_ds_load2_begin_op
 497  *
 498  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 499  *              out_op          - Wher to return op if a new one is created
 500  *
 501  * RETURN:      Status
 502  *
 503  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 504  *
 505  ******************************************************************************/
 506
 507 acpi_status
 508 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
 509                        union acpi_parse_object **out_op)
 510 {
 511         union acpi_parse_object *op;
 512         struct acpi_namespace_node *node;
 513         acpi_status status;
 514         acpi_object_type object_type;
 515         char *buffer_ptr;
 516
 517         ACPI_FUNCTION_TRACE("ds_load2_begin_op");
 518
 519         op = walk_state->op;
 520         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 521                           walk_state));
 522
 523         if (op) {
 524                 if ((walk_state->control_state) &&
 525                     (walk_state->control_state->common.state ==
 526                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 527
 528                         /* We are executing a while loop outside of a method */
 529
 530                         status = acpi_ds_exec_begin_op(walk_state, out_op);
 531                         return_ACPI_STATUS(status);
 532                 }
 533
 534                 /* We only care about Namespace opcodes here */
 535
 536                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 537                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 538                     (!(walk_state->op_info->flags & AML_NAMED))) {
 539 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 540                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 541                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 542
 543                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 544                                                   "Begin/EXEC: %s (fl %8.8X)\n",
 545                                                   walk_state->op_info->name,
 546                                                   walk_state->op_info->flags));
 547
 548                                 /* Executing a type1 or type2 opcode outside of a method */
 549
 550                                 status =
 551                                     acpi_ds_exec_begin_op(walk_state, out_op);
 552                                 return_ACPI_STATUS(status);
 553                         }
 554 #endif
 555                         return_ACPI_STATUS(AE_OK);
 556                 }
 557
 558                 /* Get the name we are going to enter or lookup in the namespace */
 559
 560                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 561
 562                         /* For Namepath op, get the path string */
 563
 564                         buffer_ptr = op->common.value.string;
 565                         if (!buffer_ptr) {
 566
 567                                 /* No name, just exit */
 568
 569                                 return_ACPI_STATUS(AE_OK);
 570                         }
 571                 } else {
 572                         /* Get name from the op */
 573
 574                         buffer_ptr = (char *)&op->named.name;
 575                 }
 576         } else {
 577                 /* Get the namestring from the raw AML */
 578
 579                 buffer_ptr =
 580                     acpi_ps_get_next_namestring(&walk_state->parser_state);
 581         }
 582
 583         /* Map the opcode into an internal object type */
 584
 585         object_type = walk_state->op_info->object_type;
 586
 587         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 588                           "State=%p Op=%p Type=%X\n", walk_state, op,
 589                           object_type));
 590
 591         switch (walk_state->opcode) {
 592         case AML_FIELD_OP:
 593         case AML_BANK_FIELD_OP:
 594         case AML_INDEX_FIELD_OP:
 595
 596                 node = NULL;
 597                 status = AE_OK;
 598                 break;
 599
 600         case AML_INT_NAMEPATH_OP:
 601
 602                 /*
 603                  * The name_path is an object reference to an existing object.
 604                  * Don't enter the name into the namespace, but look it up
 605                  * for use later.
 606                  */
 607                 status =
 608                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 609                                    object_type, ACPI_IMODE_EXECUTE,
 610                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 611                 break;
 612
 613         case AML_SCOPE_OP:
 614
 615                 /*
 616                  * The Path is an object reference to an existing object.
 617                  * Don't enter the name into the namespace, but look it up
 618                  * for use later.
 619                  */
 620                 status =
 621                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 622                                    object_type, ACPI_IMODE_EXECUTE,
 623                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 624                 if (ACPI_FAILURE(status)) {
 625 #ifdef ACPI_ASL_COMPILER
 626                         if (status == AE_NOT_FOUND) {
 627                                 status = AE_OK;
 628                         } else {
 629                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 630                         }
 631 #else
 632                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 633 #endif
 634                         return_ACPI_STATUS(status);
 635                 }
 636                 /*
 637                  * We must check to make sure that the target is
 638                  * one of the opcodes that actually opens a scope
 639                  */
 640                 switch (node->type) {
 641                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
 642                 case ACPI_TYPE_DEVICE:
 643                 case ACPI_TYPE_POWER:
 644                 case ACPI_TYPE_PROCESSOR:
 645                 case ACPI_TYPE_THERMAL:
 646
 647                         /* These are acceptable types */
 648                         break;
 649
 650                 case ACPI_TYPE_INTEGER:
 651                 case ACPI_TYPE_STRING:
 652                 case ACPI_TYPE_BUFFER:
 653
 654                         /*
 655                          * These types we will allow, but we will change the type.  This
 656                          * enables some existing code of the form:
 657                          *
 658                          *  Name (DEB, 0)
 659                          *  Scope (DEB) { ... }
 660                          */
 661
 662                         ACPI_WARNING((AE_INFO,
 663                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
 664                                       buffer_ptr,
 665                                       acpi_ut_get_type_name(node->type)));
 666
 667                         node->type = ACPI_TYPE_ANY;
 668                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 669                         break;
 670
 671                 default:
 672
 673                         /* All other types are an error */
 674
 675                         ACPI_ERROR((AE_INFO,
 676                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
 677                                     acpi_ut_get_type_name(node->type),
 678                                     buffer_ptr));
 679
 680                         return (AE_AML_OPERAND_TYPE);
 681                 }
 682                 break;
 683
 684         default:
 685
 686                 /* All other opcodes */
 687
 688                 if (op && op->common.node) {
 689
 690                         /* This op/node was previously entered into the namespace */
 691
 692                         node = op->common.node;
 693
 694                         if (acpi_ns_opens_scope(object_type)) {
 695                                 status =
 696                                     acpi_ds_scope_stack_push(node, object_type,
 697                                                              walk_state);
 698                                 if (ACPI_FAILURE(status)) {
 699                                         return_ACPI_STATUS(status);
 700                                 }
 701
 702                         }
 703                         return_ACPI_STATUS(AE_OK);
 704                 }
 705
 706                 /*
 707                  * Enter the named type into the internal namespace.  We enter the name
 708                  * as we go downward in the parse tree.  Any necessary subobjects that
 709                  * involve arguments to the opcode must be created as we go back up the
 710                  * parse tree later.
 711                  *
 712                  * Note: Name may already exist if we are executing a deferred opcode.
 713                  */
 714                 if (walk_state->deferred_node) {
 715
 716                         /* This name is already in the namespace, get the node */
 717
 718                         node = walk_state->deferred_node;
 719                         status = AE_OK;
 720                         break;
 721                 }
 722
 723                 /* Add new entry into namespace */
 724
 725                 status =
 726                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 727                                    object_type, ACPI_IMODE_LOAD_PASS2,
 728                                    ACPI_NS_NO_UPSEARCH, walk_state, &(node));
 729                 break;
 730         }
 731
 732         if (ACPI_FAILURE(status)) {
 733                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 734                 return_ACPI_STATUS(status);
 735         }
 736
 737         if (!op) {
 738
 739                 /* Create a new op */
 740
 741                 op = acpi_ps_alloc_op(walk_state->opcode);
 742                 if (!op) {
 743                         return_ACPI_STATUS(AE_NO_MEMORY);
 744                 }
 745
 746                 /* Initialize the new op */
 747
 748                 if (node) {
 749                         op->named.name = node->name.integer;
 750                 }
 751                 *out_op = op;
 752         }
 753
 754         /*
 755          * Put the Node in the "op" object that the parser uses, so we
 756          * can get it again quickly when this scope is closed
 757          */
 758         op->common.node = node;
 759
 760         return_ACPI_STATUS(status);
 761 }
 762
 763 /*******************************************************************************
 764  *
 765  * FUNCTION:    acpi_ds_load2_end_op
 766  *
 767  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 768  *
 769  * RETURN:      Status
 770  *
 771  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 772  *              both control methods and everything else.
 773  *
 774  ******************************************************************************/
 775
 776 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 777 {
 778         union acpi_parse_object *op;
 779         acpi_status status = AE_OK;
 780         acpi_object_type object_type;
 781         struct acpi_namespace_node *node;
 782         union acpi_parse_object *arg;
 783         struct acpi_namespace_node *new_node;
 784 #ifndef ACPI_NO_METHOD_EXECUTION
 785         u32 i;
 786 #endif
 787
 788         ACPI_FUNCTION_TRACE("ds_load2_end_op");
 789
 790         op = walk_state->op;
 791         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 792                           walk_state->op_info->name, op, walk_state));
 793
 794         /* Check if opcode had an associated namespace object */
 795
 796         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 797 #ifndef ACPI_NO_METHOD_EXECUTION
 798 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 799                 /* No namespace object. Executable opcode? */
 800
 801                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 802                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 803                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 804                                           "End/EXEC:   %s (fl %8.8X)\n",
 805                                           walk_state->op_info->name,
 806                                           walk_state->op_info->flags));
 807
 808                         /* Executing a type1 or type2 opcode outside of a method */
 809
 810                         status = acpi_ds_exec_end_op(walk_state);
 811                         return_ACPI_STATUS(status);
 812                 }
 813 #endif
 814 #endif
 815                 return_ACPI_STATUS(AE_OK);
 816         }
 817
 818         if (op->common.aml_opcode == AML_SCOPE_OP) {
 819                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 820                                   "Ending scope Op=%p State=%p\n", op,
 821                                   walk_state));
 822         }
 823
 824         object_type = walk_state->op_info->object_type;
 825
 826         /*
 827          * Get the Node/name from the earlier lookup
 828          * (It was saved in the *op structure)
 829          */
 830         node = op->common.node;
 831
 832         /*
 833          * Put the Node on the object stack (Contains the ACPI Name of
 834          * this object)
 835          */
 836         walk_state->operands[0] = (void *)node;
 837         walk_state->num_operands = 1;
 838
 839         /* Pop the scope stack */
 840
 841         if (acpi_ns_opens_scope(object_type) &&
 842             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 843                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 844                                   "(%s) Popping scope for Op %p\n",
 845                                   acpi_ut_get_type_name(object_type), op));
 846
 847                 status = acpi_ds_scope_stack_pop(walk_state);
 848                 if (ACPI_FAILURE(status)) {
 849                         goto cleanup;
 850                 }
 851         }
 852
 853         /*
 854          * Named operations are as follows:
 855          *
 856          * AML_ALIAS
 857          * AML_BANKFIELD
 858          * AML_CREATEBITFIELD
 859          * AML_CREATEBYTEFIELD
 860          * AML_CREATEDWORDFIELD
 861          * AML_CREATEFIELD
 862          * AML_CREATEQWORDFIELD
 863          * AML_CREATEWORDFIELD
 864          * AML_DATA_REGION
 865          * AML_DEVICE
 866          * AML_EVENT
 867          * AML_FIELD
 868          * AML_INDEXFIELD
 869          * AML_METHOD
 870          * AML_METHODCALL
 871          * AML_MUTEX
 872          * AML_NAME
 873          * AML_NAMEDFIELD
 874          * AML_OPREGION
 875          * AML_POWERRES
 876          * AML_PROCESSOR
 877          * AML_SCOPE
 878          * AML_THERMALZONE
 879          */
 880
 881         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 882                           "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 883                           acpi_ps_get_opcode_name(op->common.aml_opcode),
 884                           walk_state, op, node));
 885
 886         /* Decode the opcode */
 887
 888         arg = op->common.value.arg;
 889
 890         switch (walk_state->op_info->type) {
 891 #ifndef ACPI_NO_METHOD_EXECUTION
 892
 893         case AML_TYPE_CREATE_FIELD:
 894
 895                 /*
 896                  * Create the field object, but the field buffer and index must
 897                  * be evaluated later during the execution phase
 898                  */
 899                 status = acpi_ds_create_buffer_field(op, walk_state);
 900                 break;
 901
 902         case AML_TYPE_NAMED_FIELD:
 903
 904                 /*
 905                  * If we are executing a method, initialize the field
 906                  */
 907                 if (walk_state->method_node) {
 908                         status = acpi_ds_init_field_objects(op, walk_state);
 909                 }
 910
 911                 switch (op->common.aml_opcode) {
 912                 case AML_INDEX_FIELD_OP:
 913
 914                         status =
 915                             acpi_ds_create_index_field(op,
 916                                                        (acpi_handle) arg->
 917                                                        common.node, walk_state);
 918                         break;
 919
 920                 case AML_BANK_FIELD_OP:
 921
 922                         status =
 923                             acpi_ds_create_bank_field(op, arg->common.node,
 924                                                       walk_state);
 925                         break;
 926
 927                 case AML_FIELD_OP:
 928
 929                         status =
 930                             acpi_ds_create_field(op, arg->common.node,
 931                                                  walk_state);
 932                         break;
 933
 934                 default:
 935                         /* All NAMED_FIELD opcodes must be handled above */
 936                         break;
 937                 }
 938                 break;
 939
 940         case AML_TYPE_NAMED_SIMPLE:
 941
 942                 status = acpi_ds_create_operands(walk_state, arg);
 943                 if (ACPI_FAILURE(status)) {
 944                         goto cleanup;
 945                 }
 946
 947                 switch (op->common.aml_opcode) {
 948                 case AML_PROCESSOR_OP:
 949
 950                         status = acpi_ex_create_processor(walk_state);
 951                         break;
 952
 953                 case AML_POWER_RES_OP:
 954
 955                         status = acpi_ex_create_power_resource(walk_state);
 956                         break;
 957
 958                 case AML_MUTEX_OP:
 959
 960                         status = acpi_ex_create_mutex(walk_state);
 961                         break;
 962
 963                 case AML_EVENT_OP:
 964
 965                         status = acpi_ex_create_event(walk_state);
 966                         break;
 967
 968                 case AML_DATA_REGION_OP:
 969
 970                         status = acpi_ex_create_table_region(walk_state);
 971                         break;
 972
 973                 case AML_ALIAS_OP:
 974
 975                         status = acpi_ex_create_alias(walk_state);
 976                         break;
 977
 978                 default:
 979                         /* Unknown opcode */
 980
 981                         status = AE_OK;
 982                         goto cleanup;
 983                 }
 984
 985                 /* Delete operands */
 986
 987                 for (i = 1; i < walk_state->num_operands; i++) {
 988                         acpi_ut_remove_reference(walk_state->operands[i]);
 989                         walk_state->operands[i] = NULL;
 990                 }
 991
 992                 break;
 993 #endif                          /* ACPI_NO_METHOD_EXECUTION */
 994
 995         case AML_TYPE_NAMED_COMPLEX:
 996
 997                 switch (op->common.aml_opcode) {
 998 #ifndef ACPI_NO_METHOD_EXECUTION
 999                 case AML_REGION_OP:
1000
1001                         /*
1002                          * If we are executing a method, initialize the region
1003                          */
1004                         if (walk_state->method_node) {
1005                                 status =
1006                                     acpi_ex_create_region(op->named.data,
1007                                                           op->named.length,
1008                                                           (acpi_adr_space_type)
1009                                                           ((op->common.value.
1010                                                             arg)->common.value.
1011                                                            integer),
1012                                                           walk_state);
1013                                 if (ACPI_FAILURE(status)) {
1014                                         return (status);
1015                                 }
1016                         }
1017
1018                         /*
1019                          * The op_region is not fully parsed at this time. Only valid
1020                          * argument is the space_id. (We must save the address of the
1021                          * AML of the address and length operands)
1022                          */
1023                         /*
1024                          * If we have a valid region, initialize it
1025                          * Namespace is NOT locked at this point.
1026                          */
1027                         status =
1028                             acpi_ev_initialize_region
1029                             (acpi_ns_get_attached_object(node), FALSE);
1030                         if (ACPI_FAILURE(status)) {
1031                                 /*
1032                                  *  If AE_NOT_EXIST is returned, it is not fatal
1033                                  *  because many regions get created before a handler
1034                                  *  is installed for said region.
1035                                  */
1036                                 if (AE_NOT_EXIST == status) {
1037                                         status = AE_OK;
1038                                 }
1039                         }
1040                         break;
1041
1042                 case AML_NAME_OP:
1043
1044                         status = acpi_ds_create_node(walk_state, node, op);
1045                         break;
1046
1047                 case AML_METHOD_OP:
1048                         /*
1049                          * method_op pkg_length name_string method_flags term_list
1050                          *
1051                          * Note: We must create the method node/object pair as soon as we
1052                          * see the method declaration.  This allows later pass1 parsing
1053                          * of invocations of the method (need to know the number of
1054                          * arguments.)
1055                          */
1056                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1057                                           "LOADING-Method: State=%p Op=%p named_obj=%p\n",
1058                                           walk_state, op, op->named.node));
1059
1060                         if (!acpi_ns_get_attached_object(op->named.node)) {
1061                                 walk_state->operands[0] =
1062                                     ACPI_CAST_PTR(void, op->named.node);
1063                                 walk_state->num_operands = 1;
1064
1065                                 status =
1066                                     acpi_ds_create_operands(walk_state,
1067                                                             op->common.value.
1068                                                             arg);
1069                                 if (ACPI_SUCCESS(status)) {
1070                                         status =
1071                                             acpi_ex_create_method(op->named.
1072                                                                   data,
1073                                                                   op->named.
1074                                                                   length,
1075                                                                   walk_state);
1076                                 }
1077                                 walk_state->operands[0] = NULL;
1078                                 walk_state->num_operands = 0;
1079
1080                                 if (ACPI_FAILURE(status)) {
1081                                         return_ACPI_STATUS(status);
1082                                 }
1083                         }
1084                         break;
1085
1086 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1087
1088                 default:
1089                         /* All NAMED_COMPLEX opcodes must be handled above */
1090                         break;
1091                 }
1092                 break;
1093
1094         case AML_CLASS_INTERNAL:
1095
1096                 /* case AML_INT_NAMEPATH_OP: */
1097                 break;
1098
1099         case AML_CLASS_METHOD_CALL:
1100
1101                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1102                                   "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
1103                                   walk_state, op, node));
1104
1105                 /*
1106                  * Lookup the method name and save the Node
1107                  */
1108                 status =
1109                     acpi_ns_lookup(walk_state->scope_info,
1110                                    arg->common.value.string, ACPI_TYPE_ANY,
1111                                    ACPI_IMODE_LOAD_PASS2,
1112                                    ACPI_NS_SEARCH_PARENT |
1113                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1114                                    &(new_node));
1115                 if (ACPI_SUCCESS(status)) {
1116
1117                         /*
1118                          * Make sure that what we found is indeed a method
1119                          * We didn't search for a method on purpose, to see if the name
1120                          * would resolve
1121                          */
1122                         if (new_node->type != ACPI_TYPE_METHOD) {
1123                                 status = AE_AML_OPERAND_TYPE;
1124                         }
1125
1126                         /* We could put the returned object (Node) on the object stack for
1127                          * later, but for now, we will put it in the "op" object that the
1128                          * parser uses, so we can get it again at the end of this scope
1129                          */
1130                         op->common.node = new_node;
1131                 } else {
1132                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1133                 }
1134                 break;
1135
1136         default:
1137                 break;
1138         }
1139
1140       cleanup:
1141
1142         /* Remove the Node pushed at the very beginning */
1143
1144         walk_state->operands[0] = NULL;
1145         walk_state->num_operands = 0;
1146         return_ACPI_STATUS(status);
1147 }