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, ACPI_TYPE_DEVICE, 0);
 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                         if (status == AE_ALREADY_EXISTS) {
 307
 308                                 /* The name already exists in this scope */
 309
 310                                 if (node->flags & ANOBJ_IS_EXTERNAL) {
 311                                         /*
 312                                          * Allow one create on an object or segment that was
 313                                          * previously declared External
 314                                          */
 315                                         node->flags &= ~ANOBJ_IS_EXTERNAL;
 316                                         node->type = (u8) object_type;
 317
 318                                         /* Just retyped a node, probably will need to open a scope */
 319
 320                                         if (acpi_ns_opens_scope(object_type)) {
 321                                                 status =
 322                                                     acpi_ds_scope_stack_push
 323                                                     (node, object_type,
 324                                                      walk_state);
 325                                                 if (ACPI_FAILURE(status)) {
 326                                                         return_ACPI_STATUS
 327                                                             (status);
 328                                                 }
 329                                         }
 330                                         status = AE_OK;
 331                                 }
 332                         }
 333
 334                         if (ACPI_FAILURE(status)) {
 335
 336                                 ACPI_ERROR_NAMESPACE(path, status);
 337                                 return_ACPI_STATUS(status);
 338                         }
 339                 }
 340                 break;
 341         }
 342
 343         /* Common exit */
 344
 345         if (!op) {
 346
 347                 /* Create a new op */
 348
 349                 op = acpi_ps_alloc_op(walk_state->opcode);
 350                 if (!op) {
 351                         return_ACPI_STATUS(AE_NO_MEMORY);
 352                 }
 353         }
 354
 355         /* Initialize the op */
 356
 357 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 358         op->named.path = ACPI_CAST_PTR(u8, path);
 359 #endif
 360
 361         if (node) {
 362                 /*
 363                  * Put the Node in the "op" object that the parser uses, so we
 364                  * can get it again quickly when this scope is closed
 365                  */
 366                 op->common.node = node;
 367                 op->named.name = node->name.integer;
 368         }
 369
 370         acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
 371                            op);
 372         *out_op = op;
 373         return_ACPI_STATUS(status);
 374 }
 375
 376 /*******************************************************************************
 377  *
 378  * FUNCTION:    acpi_ds_load1_end_op
 379  *
 380  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 381  *
 382  * RETURN:      Status
 383  *
 384  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 385  *              both control methods and everything else.
 386  *
 387  ******************************************************************************/
 388
 389 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
 390 {
 391         union acpi_parse_object *op;
 392         acpi_object_type object_type;
 393         acpi_status status = AE_OK;
 394
 395         ACPI_FUNCTION_TRACE(ds_load1_end_op);
 396
 397         op = walk_state->op;
 398         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 399                           walk_state));
 400
 401         /* We are only interested in opcodes that have an associated name */
 402
 403         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 404                 return_ACPI_STATUS(AE_OK);
 405         }
 406
 407         /* Get the object type to determine if we should pop the scope */
 408
 409         object_type = walk_state->op_info->object_type;
 410
 411 #ifndef ACPI_NO_METHOD_EXECUTION
 412         if (walk_state->op_info->flags & AML_FIELD) {
 413                 /*
 414                  * If we are executing a method, do not create any namespace objects
 415                  * during the load phase, only during execution.
 416                  */
 417                 if (!walk_state->method_node) {
 418                         if (walk_state->opcode == AML_FIELD_OP ||
 419                             walk_state->opcode == AML_BANK_FIELD_OP ||
 420                             walk_state->opcode == AML_INDEX_FIELD_OP) {
 421                                 status =
 422                                     acpi_ds_init_field_objects(op, walk_state);
 423                         }
 424                 }
 425                 return_ACPI_STATUS(status);
 426         }
 427
 428         /*
 429          * If we are executing a method, do not create any namespace objects
 430          * during the load phase, only during execution.
 431          */
 432         if (!walk_state->method_node) {
 433                 if (op->common.aml_opcode == AML_REGION_OP) {
 434                         status =
 435                             acpi_ex_create_region(op->named.data,
 436                                                   op->named.length,
 437                                                   (acpi_adr_space_type)
 438                                                   ((op->common.value.arg)->
 439                                                    common.value.integer),
 440                                                   walk_state);
 441                         if (ACPI_FAILURE(status)) {
 442                                 return_ACPI_STATUS(status);
 443                         }
 444                 }
 445         }
 446 #endif
 447
 448         if (op->common.aml_opcode == AML_NAME_OP) {
 449
 450                 /* For Name opcode, get the object type from the argument */
 451
 452                 if (op->common.value.arg) {
 453                         object_type = (acpi_ps_get_opcode_info((op->common.
 454                                                                 value.arg)->
 455                                                                common.
 456                                                                aml_opcode))->
 457                             object_type;
 458
 459                         /* Set node type if we have a namespace node */
 460
 461                         if (op->common.node) {
 462                                 op->common.node->type = (u8) object_type;
 463                         }
 464                 }
 465         }
 466
 467         /*
 468          * If we are executing a method, do not create any namespace objects
 469          * during the load phase, only during execution.
 470          */
 471         if (!walk_state->method_node) {
 472                 if (op->common.aml_opcode == AML_METHOD_OP) {
 473                         /*
 474                          * method_op pkg_length name_string method_flags term_list
 475                          *
 476                          * Note: We must create the method node/object pair as soon as we
 477                          * see the method declaration.  This allows later pass1 parsing
 478                          * of invocations of the method (need to know the number of
 479                          * arguments.)
 480                          */
 481                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 482                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
 483                                           walk_state, op, op->named.node));
 484
 485                         if (!acpi_ns_get_attached_object(op->named.node)) {
 486                                 walk_state->operands[0] =
 487                                     ACPI_CAST_PTR(void, op->named.node);
 488                                 walk_state->num_operands = 1;
 489
 490                                 status =
 491                                     acpi_ds_create_operands(walk_state,
 492                                                             op->common.value.
 493                                                             arg);
 494                                 if (ACPI_SUCCESS(status)) {
 495                                         status =
 496                                             acpi_ex_create_method(op->named.
 497                                                                   data,
 498                                                                   op->named.
 499                                                                   length,
 500                                                                   walk_state);
 501                                 }
 502                                 walk_state->operands[0] = NULL;
 503                                 walk_state->num_operands = 0;
 504
 505                                 if (ACPI_FAILURE(status)) {
 506                                         return_ACPI_STATUS(status);
 507                                 }
 508                         }
 509                 }
 510         }
 511
 512         /* Pop the scope stack (only if loading a table) */
 513
 514         if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
 515                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 516                                   "(%s): Popping scope for Op %p\n",
 517                                   acpi_ut_get_type_name(object_type), op));
 518
 519                 status = acpi_ds_scope_stack_pop(walk_state);
 520         }
 521
 522         return_ACPI_STATUS(status);
 523 }
 524
 525 /*******************************************************************************
 526  *
 527  * FUNCTION:    acpi_ds_load2_begin_op
 528  *
 529  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 530  *              out_op          - Wher to return op if a new one is created
 531  *
 532  * RETURN:      Status
 533  *
 534  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 535  *
 536  ******************************************************************************/
 537
 538 acpi_status
 539 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
 540                        union acpi_parse_object **out_op)
 541 {
 542         union acpi_parse_object *op;
 543         struct acpi_namespace_node *node;
 544         acpi_status status;
 545         acpi_object_type object_type;
 546         char *buffer_ptr;
 547
 548         ACPI_FUNCTION_TRACE(ds_load2_begin_op);
 549
 550         op = walk_state->op;
 551         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 552                           walk_state));
 553
 554         if (op) {
 555                 if ((walk_state->control_state) &&
 556                     (walk_state->control_state->common.state ==
 557                      ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 558
 559                         /* We are executing a while loop outside of a method */
 560
 561                         status = acpi_ds_exec_begin_op(walk_state, out_op);
 562                         return_ACPI_STATUS(status);
 563                 }
 564
 565                 /* We only care about Namespace opcodes here */
 566
 567                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 568                      (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 569                     (!(walk_state->op_info->flags & AML_NAMED))) {
 570 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 571                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 572                             (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 573
 574                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 575                                                   "Begin/EXEC: %s (fl %8.8X)\n",
 576                                                   walk_state->op_info->name,
 577                                                   walk_state->op_info->flags));
 578
 579                                 /* Executing a type1 or type2 opcode outside of a method */
 580
 581                                 status =
 582                                     acpi_ds_exec_begin_op(walk_state, out_op);
 583                                 return_ACPI_STATUS(status);
 584                         }
 585 #endif
 586                         return_ACPI_STATUS(AE_OK);
 587                 }
 588
 589                 /* Get the name we are going to enter or lookup in the namespace */
 590
 591                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 592
 593                         /* For Namepath op, get the path string */
 594
 595                         buffer_ptr = op->common.value.string;
 596                         if (!buffer_ptr) {
 597
 598                                 /* No name, just exit */
 599
 600                                 return_ACPI_STATUS(AE_OK);
 601                         }
 602                 } else {
 603                         /* Get name from the op */
 604
 605                         buffer_ptr = (char *)&op->named.name;
 606                 }
 607         } else {
 608                 /* Get the namestring from the raw AML */
 609
 610                 buffer_ptr =
 611                     acpi_ps_get_next_namestring(&walk_state->parser_state);
 612         }
 613
 614         /* Map the opcode into an internal object type */
 615
 616         object_type = walk_state->op_info->object_type;
 617
 618         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 619                           "State=%p Op=%p Type=%X\n", walk_state, op,
 620                           object_type));
 621
 622         switch (walk_state->opcode) {
 623         case AML_FIELD_OP:
 624         case AML_BANK_FIELD_OP:
 625         case AML_INDEX_FIELD_OP:
 626
 627                 node = NULL;
 628                 status = AE_OK;
 629                 break;
 630
 631         case AML_INT_NAMEPATH_OP:
 632
 633                 /*
 634                  * The name_path is an object reference to an existing object.
 635                  * Don't enter the name into the namespace, but look it up
 636                  * for use later.
 637                  */
 638                 status =
 639                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 640                                    object_type, ACPI_IMODE_EXECUTE,
 641                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 642                 break;
 643
 644         case AML_SCOPE_OP:
 645
 646                 /*
 647                  * The Path is an object reference to an existing object.
 648                  * Don't enter the name into the namespace, but look it up
 649                  * for use later.
 650                  */
 651                 status =
 652                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 653                                    object_type, ACPI_IMODE_EXECUTE,
 654                                    ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 655                 if (ACPI_FAILURE(status)) {
 656 #ifdef ACPI_ASL_COMPILER
 657                         if (status == AE_NOT_FOUND) {
 658                                 status = AE_OK;
 659                         } else {
 660                                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 661                         }
 662 #else
 663                         ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 664 #endif
 665                         return_ACPI_STATUS(status);
 666                 }
 667                 /*
 668                  * We must check to make sure that the target is
 669                  * one of the opcodes that actually opens a scope
 670                  */
 671                 switch (node->type) {
 672                 case ACPI_TYPE_LOCAL_SCOPE:     /* Scope */
 673                 case ACPI_TYPE_DEVICE:
 674                 case ACPI_TYPE_POWER:
 675                 case ACPI_TYPE_PROCESSOR:
 676                 case ACPI_TYPE_THERMAL:
 677
 678                         /* These are acceptable types */
 679                         break;
 680
 681                 case ACPI_TYPE_INTEGER:
 682                 case ACPI_TYPE_STRING:
 683                 case ACPI_TYPE_BUFFER:
 684
 685                         /*
 686                          * These types we will allow, but we will change the type.  This
 687                          * enables some existing code of the form:
 688                          *
 689                          *  Name (DEB, 0)
 690                          *  Scope (DEB) { ... }
 691                          */
 692
 693                         ACPI_WARNING((AE_INFO,
 694                                       "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
 695                                       buffer_ptr,
 696                                       acpi_ut_get_type_name(node->type)));
 697
 698                         node->type = ACPI_TYPE_ANY;
 699                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 700                         break;
 701
 702                 default:
 703
 704                         /* All other types are an error */
 705
 706                         ACPI_ERROR((AE_INFO,
 707                                     "Invalid type (%s) for target of Scope operator [%4.4s]",
 708                                     acpi_ut_get_type_name(node->type),
 709                                     buffer_ptr));
 710
 711                         return (AE_AML_OPERAND_TYPE);
 712                 }
 713                 break;
 714
 715         default:
 716
 717                 /* All other opcodes */
 718
 719                 if (op && op->common.node) {
 720
 721                         /* This op/node was previously entered into the namespace */
 722
 723                         node = op->common.node;
 724
 725                         if (acpi_ns_opens_scope(object_type)) {
 726                                 status =
 727                                     acpi_ds_scope_stack_push(node, object_type,
 728                                                              walk_state);
 729                                 if (ACPI_FAILURE(status)) {
 730                                         return_ACPI_STATUS(status);
 731                                 }
 732
 733                         }
 734                         return_ACPI_STATUS(AE_OK);
 735                 }
 736
 737                 /*
 738                  * Enter the named type into the internal namespace.  We enter the name
 739                  * as we go downward in the parse tree.  Any necessary subobjects that
 740                  * involve arguments to the opcode must be created as we go back up the
 741                  * parse tree later.
 742                  *
 743                  * Note: Name may already exist if we are executing a deferred opcode.
 744                  */
 745                 if (walk_state->deferred_node) {
 746
 747                         /* This name is already in the namespace, get the node */
 748
 749                         node = walk_state->deferred_node;
 750                         status = AE_OK;
 751                         break;
 752                 }
 753
 754                 /* Add new entry into namespace */
 755
 756                 status =
 757                     acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
 758                                    object_type, ACPI_IMODE_LOAD_PASS2,
 759                                    ACPI_NS_NO_UPSEARCH, walk_state, &(node));
 760                 break;
 761         }
 762
 763         if (ACPI_FAILURE(status)) {
 764                 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
 765                 return_ACPI_STATUS(status);
 766         }
 767
 768         if (!op) {
 769
 770                 /* Create a new op */
 771
 772                 op = acpi_ps_alloc_op(walk_state->opcode);
 773                 if (!op) {
 774                         return_ACPI_STATUS(AE_NO_MEMORY);
 775                 }
 776
 777                 /* Initialize the new op */
 778
 779                 if (node) {
 780                         op->named.name = node->name.integer;
 781                 }
 782                 *out_op = op;
 783         }
 784
 785         /*
 786          * Put the Node in the "op" object that the parser uses, so we
 787          * can get it again quickly when this scope is closed
 788          */
 789         op->common.node = node;
 790
 791         return_ACPI_STATUS(status);
 792 }
 793
 794 /*******************************************************************************
 795  *
 796  * FUNCTION:    acpi_ds_load2_end_op
 797  *
 798  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 799  *
 800  * RETURN:      Status
 801  *
 802  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 803  *              both control methods and everything else.
 804  *
 805  ******************************************************************************/
 806
 807 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 808 {
 809         union acpi_parse_object *op;
 810         acpi_status status = AE_OK;
 811         acpi_object_type object_type;
 812         struct acpi_namespace_node *node;
 813         union acpi_parse_object *arg;
 814         struct acpi_namespace_node *new_node;
 815 #ifndef ACPI_NO_METHOD_EXECUTION
 816         u32 i;
 817 #endif
 818
 819         ACPI_FUNCTION_TRACE(ds_load2_end_op);
 820
 821         op = walk_state->op;
 822         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 823                           walk_state->op_info->name, op, walk_state));
 824
 825         /* Check if opcode had an associated namespace object */
 826
 827         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 828 #ifndef ACPI_NO_METHOD_EXECUTION
 829 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 830                 /* No namespace object. Executable opcode? */
 831
 832                 if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 833                     (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 834                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 835                                           "End/EXEC:   %s (fl %8.8X)\n",
 836                                           walk_state->op_info->name,
 837                                           walk_state->op_info->flags));
 838
 839                         /* Executing a type1 or type2 opcode outside of a method */
 840
 841                         status = acpi_ds_exec_end_op(walk_state);
 842                         return_ACPI_STATUS(status);
 843                 }
 844 #endif
 845 #endif
 846                 return_ACPI_STATUS(AE_OK);
 847         }
 848
 849         if (op->common.aml_opcode == AML_SCOPE_OP) {
 850                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 851                                   "Ending scope Op=%p State=%p\n", op,
 852                                   walk_state));
 853         }
 854
 855         object_type = walk_state->op_info->object_type;
 856
 857         /*
 858          * Get the Node/name from the earlier lookup
 859          * (It was saved in the *op structure)
 860          */
 861         node = op->common.node;
 862
 863         /*
 864          * Put the Node on the object stack (Contains the ACPI Name of
 865          * this object)
 866          */
 867         walk_state->operands[0] = (void *)node;
 868         walk_state->num_operands = 1;
 869
 870         /* Pop the scope stack */
 871
 872         if (acpi_ns_opens_scope(object_type) &&
 873             (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 874                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 875                                   "(%s) Popping scope for Op %p\n",
 876                                   acpi_ut_get_type_name(object_type), op));
 877
 878                 status = acpi_ds_scope_stack_pop(walk_state);
 879                 if (ACPI_FAILURE(status)) {
 880                         goto cleanup;
 881                 }
 882         }
 883
 884         /*
 885          * Named operations are as follows:
 886          *
 887          * AML_ALIAS
 888          * AML_BANKFIELD
 889          * AML_CREATEBITFIELD
 890          * AML_CREATEBYTEFIELD
 891          * AML_CREATEDWORDFIELD
 892          * AML_CREATEFIELD
 893          * AML_CREATEQWORDFIELD
 894          * AML_CREATEWORDFIELD
 895          * AML_DATA_REGION
 896          * AML_DEVICE
 897          * AML_EVENT
 898          * AML_FIELD
 899          * AML_INDEXFIELD
 900          * AML_METHOD
 901          * AML_METHODCALL
 902          * AML_MUTEX
 903          * AML_NAME
 904          * AML_NAMEDFIELD
 905          * AML_OPREGION
 906          * AML_POWERRES
 907          * AML_PROCESSOR
 908          * AML_SCOPE
 909          * AML_THERMALZONE
 910          */
 911
 912         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 913                           "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
 914                           acpi_ps_get_opcode_name(op->common.aml_opcode),
 915                           walk_state, op, node));
 916
 917         /* Decode the opcode */
 918
 919         arg = op->common.value.arg;
 920
 921         switch (walk_state->op_info->type) {
 922 #ifndef ACPI_NO_METHOD_EXECUTION
 923
 924         case AML_TYPE_CREATE_FIELD:
 925
 926                 /*
 927                  * Create the field object, but the field buffer and index must
 928                  * be evaluated later during the execution phase
 929                  */
 930                 status = acpi_ds_create_buffer_field(op, walk_state);
 931                 break;
 932
 933         case AML_TYPE_NAMED_FIELD:
 934
 935                 /*
 936                  * If we are executing a method, initialize the field
 937                  */
 938                 if (walk_state->method_node) {
 939                         status = acpi_ds_init_field_objects(op, walk_state);
 940                 }
 941
 942                 switch (op->common.aml_opcode) {
 943                 case AML_INDEX_FIELD_OP:
 944
 945                         status =
 946                             acpi_ds_create_index_field(op,
 947                                                        (acpi_handle) arg->
 948                                                        common.node, walk_state);
 949                         break;
 950
 951                 case AML_BANK_FIELD_OP:
 952
 953                         status =
 954                             acpi_ds_create_bank_field(op, arg->common.node,
 955                                                       walk_state);
 956                         break;
 957
 958                 case AML_FIELD_OP:
 959
 960                         status =
 961                             acpi_ds_create_field(op, arg->common.node,
 962                                                  walk_state);
 963                         break;
 964
 965                 default:
 966                         /* All NAMED_FIELD opcodes must be handled above */
 967                         break;
 968                 }
 969                 break;
 970
 971         case AML_TYPE_NAMED_SIMPLE:
 972
 973                 status = acpi_ds_create_operands(walk_state, arg);
 974                 if (ACPI_FAILURE(status)) {
 975                         goto cleanup;
 976                 }
 977
 978                 switch (op->common.aml_opcode) {
 979                 case AML_PROCESSOR_OP:
 980
 981                         status = acpi_ex_create_processor(walk_state);
 982                         break;
 983
 984                 case AML_POWER_RES_OP:
 985
 986                         status = acpi_ex_create_power_resource(walk_state);
 987                         break;
 988
 989                 case AML_MUTEX_OP:
 990
 991                         status = acpi_ex_create_mutex(walk_state);
 992                         break;
 993
 994                 case AML_EVENT_OP:
 995
 996                         status = acpi_ex_create_event(walk_state);
 997                         break;
 998
 999                 case AML_DATA_REGION_OP:
1000
1001                         status = acpi_ex_create_table_region(walk_state);
1002                         break;
1003
1004                 case AML_ALIAS_OP:
1005
1006                         status = acpi_ex_create_alias(walk_state);
1007                         break;
1008
1009                 default:
1010                         /* Unknown opcode */
1011
1012                         status = AE_OK;
1013                         goto cleanup;
1014                 }
1015
1016                 /* Delete operands */
1017
1018                 for (i = 1; i < walk_state->num_operands; i++) {
1019                         acpi_ut_remove_reference(walk_state->operands[i]);
1020                         walk_state->operands[i] = NULL;
1021                 }
1022
1023                 break;
1024 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1025
1026         case AML_TYPE_NAMED_COMPLEX:
1027
1028                 switch (op->common.aml_opcode) {
1029 #ifndef ACPI_NO_METHOD_EXECUTION
1030                 case AML_REGION_OP:
1031
1032                         /*
1033                          * If we are executing a method, initialize the region
1034                          */
1035                         if (walk_state->method_node) {
1036                                 status =
1037                                     acpi_ex_create_region(op->named.data,
1038                                                           op->named.length,
1039                                                           (acpi_adr_space_type)
1040                                                           ((op->common.value.
1041                                                             arg)->common.value.
1042                                                            integer),
1043                                                           walk_state);
1044                                 if (ACPI_FAILURE(status)) {
1045                                         return (status);
1046                                 }
1047                         }
1048
1049                         /*
1050                          * The op_region is not fully parsed at this time. Only valid
1051                          * argument is the space_id. (We must save the address of the
1052                          * AML of the address and length operands)
1053                          */
1054                         /*
1055                          * If we have a valid region, initialize it
1056                          * Namespace is NOT locked at this point.
1057                          */
1058                         status =
1059                             acpi_ev_initialize_region
1060                             (acpi_ns_get_attached_object(node), FALSE);
1061                         if (ACPI_FAILURE(status)) {
1062                                 /*
1063                                  *  If AE_NOT_EXIST is returned, it is not fatal
1064                                  *  because many regions get created before a handler
1065                                  *  is installed for said region.
1066                                  */
1067                                 if (AE_NOT_EXIST == status) {
1068                                         status = AE_OK;
1069                                 }
1070                         }
1071                         break;
1072
1073                 case AML_NAME_OP:
1074
1075                         status = acpi_ds_create_node(walk_state, node, op);
1076                         break;
1077
1078                 case AML_METHOD_OP:
1079                         /*
1080                          * method_op pkg_length name_string method_flags term_list
1081                          *
1082                          * Note: We must create the method node/object pair as soon as we
1083                          * see the method declaration.  This allows later pass1 parsing
1084                          * of invocations of the method (need to know the number of
1085                          * arguments.)
1086                          */
1087                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1088                                           "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
1089                                           walk_state, op, op->named.node));
1090
1091                         if (!acpi_ns_get_attached_object(op->named.node)) {
1092                                 walk_state->operands[0] =
1093                                     ACPI_CAST_PTR(void, op->named.node);
1094                                 walk_state->num_operands = 1;
1095
1096                                 status =
1097                                     acpi_ds_create_operands(walk_state,
1098                                                             op->common.value.
1099                                                             arg);
1100                                 if (ACPI_SUCCESS(status)) {
1101                                         status =
1102                                             acpi_ex_create_method(op->named.
1103                                                                   data,
1104                                                                   op->named.
1105                                                                   length,
1106                                                                   walk_state);
1107                                 }
1108                                 walk_state->operands[0] = NULL;
1109                                 walk_state->num_operands = 0;
1110
1111                                 if (ACPI_FAILURE(status)) {
1112                                         return_ACPI_STATUS(status);
1113                                 }
1114                         }
1115                         break;
1116
1117 #endif                          /* ACPI_NO_METHOD_EXECUTION */
1118
1119                 default:
1120                         /* All NAMED_COMPLEX opcodes must be handled above */
1121                         break;
1122                 }
1123                 break;
1124
1125         case AML_CLASS_INTERNAL:
1126
1127                 /* case AML_INT_NAMEPATH_OP: */
1128                 break;
1129
1130         case AML_CLASS_METHOD_CALL:
1131
1132                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1133                                   "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
1134                                   walk_state, op, node));
1135
1136                 /*
1137                  * Lookup the method name and save the Node
1138                  */
1139                 status =
1140                     acpi_ns_lookup(walk_state->scope_info,
1141                                    arg->common.value.string, ACPI_TYPE_ANY,
1142                                    ACPI_IMODE_LOAD_PASS2,
1143                                    ACPI_NS_SEARCH_PARENT |
1144                                    ACPI_NS_DONT_OPEN_SCOPE, walk_state,
1145                                    &(new_node));
1146                 if (ACPI_SUCCESS(status)) {
1147                         /*
1148                          * Make sure that what we found is indeed a method
1149                          * We didn't search for a method on purpose, to see if the name
1150                          * would resolve
1151                          */
1152                         if (new_node->type != ACPI_TYPE_METHOD) {
1153                                 status = AE_AML_OPERAND_TYPE;
1154                         }
1155
1156                         /* We could put the returned object (Node) on the object stack for
1157                          * later, but for now, we will put it in the "op" object that the
1158                          * parser uses, so we can get it again at the end of this scope
1159                          */
1160                         op->common.node = new_node;
1161                 } else {
1162                         ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
1163                 }
1164                 break;
1165
1166         default:
1167                 break;
1168         }
1169
1170       cleanup:
1171
1172         /* Remove the Node pushed at the very beginning */
1173
1174         walk_state->operands[0] = NULL;
1175         walk_state->num_operands = 0;
1176         return_ACPI_STATUS(status);
1177 }