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 - 2005, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/acparser.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/acdispat.h>
  49 #include <acpi/acinterp.h>
  50 #include <acpi/acnamesp.h>
  51 #include <acpi/acevents.h>
  52
  53 #ifdef _ACPI_ASL_COMPILER
  54 #include <acpi/acdisasm.h>
  55 #endif
  56
  57 #define _COMPONENT          ACPI_DISPATCHER
  58          ACPI_MODULE_NAME    ("dswload")
  59
  60
  61 /*******************************************************************************
  62  *
  63  * FUNCTION:    acpi_ds_init_callbacks
  64  *
  65  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  66  *              pass_number     - 1, 2, or 3
  67  *
  68  * RETURN:      Status
  69  *
  70  * DESCRIPTION: Init walk state callbacks
  71  *
  72  ******************************************************************************/
  73
  74 acpi_status
  75 acpi_ds_init_callbacks (
  76         struct acpi_walk_state          *walk_state,
  77         u32                             pass_number)
  78 {
  79
  80         switch (pass_number) {
  81         case 1:
  82                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 |
  83                                    ACPI_PARSE_DELETE_TREE;
  84                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  85                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  86                 break;
  87
  88         case 2:
  89                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 |
  90                                    ACPI_PARSE_DELETE_TREE;
  91                 walk_state->descending_callback = acpi_ds_load2_begin_op;
  92                 walk_state->ascending_callback = acpi_ds_load2_end_op;
  93                 break;
  94
  95         case 3:
  96 #ifndef ACPI_NO_METHOD_EXECUTION
  97                 walk_state->parse_flags      |= ACPI_PARSE_EXECUTE  |
  98                                    ACPI_PARSE_DELETE_TREE;
  99                 walk_state->descending_callback = acpi_ds_exec_begin_op;
 100                 walk_state->ascending_callback = acpi_ds_exec_end_op;
 101 #endif
 102                 break;
 103
 104         default:
 105                 return (AE_BAD_PARAMETER);
 106         }
 107
 108         return (AE_OK);
 109 }
 110
 111
 112 /*******************************************************************************
 113  *
 114  * FUNCTION:    acpi_ds_load1_begin_op
 115  *
 116  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 117  *              out_op          - Where to return op if a new one is created
 118  *
 119  * RETURN:      Status
 120  *
 121  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 122  *
 123  ******************************************************************************/
 124
 125 acpi_status
 126 acpi_ds_load1_begin_op (
 127         struct acpi_walk_state          *walk_state,
 128         union acpi_parse_object         **out_op)
 129 {
 130         union acpi_parse_object         *op;
 131         struct acpi_namespace_node      *node;
 132         acpi_status                     status;
 133         acpi_object_type                object_type;
 134         char                            *path;
 135         u32                             flags;
 136
 137
 138         ACPI_FUNCTION_NAME ("ds_load1_begin_op");
 139
 140
 141         op = walk_state->op;
 142         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 143
 144         /* We are only interested in opcodes that have an associated name */
 145
 146         if (op) {
 147                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 148 #if 0
 149                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 150                                 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 151                                 acpi_os_printf ("\n\n***EXECUTABLE OPCODE %s***\n\n",
 152                                         walk_state->op_info->name);
 153                                 *out_op = op;
 154                                 return (AE_CTRL_SKIP);
 155                         }
 156 #endif
 157                         *out_op = op;
 158                         return (AE_OK);
 159                 }
 160
 161                 /* Check if this object has already been installed in the namespace */
 162
 163                 if (op->common.node) {
 164                         *out_op = op;
 165                         return (AE_OK);
 166                 }
 167         }
 168
 169         path = acpi_ps_get_next_namestring (&walk_state->parser_state);
 170
 171         /* Map the raw opcode into an internal object type */
 172
 173         object_type = walk_state->op_info->object_type;
 174
 175         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 176                 "State=%p Op=%p [%s]\n", walk_state, op, acpi_ut_get_type_name (object_type)));
 177
 178         switch (walk_state->opcode) {
 179         case AML_SCOPE_OP:
 180
 181                 /*
 182                  * The target name of the Scope() operator must exist at this point so
 183                  * that we can actually open the scope to enter new names underneath it.
 184                  * Allow search-to-root for single namesegs.
 185                  */
 186                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 187                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 188 #ifdef _ACPI_ASL_COMPILER
 189                 if (status == AE_NOT_FOUND) {
 190                         /*
 191                          * Table disassembly:
 192                          * Target of Scope() not found.  Generate an External for it, and
 193                          * insert the name into the namespace.
 194                          */
 195                         acpi_dm_add_to_external_list (path);
 196                         status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 197                                            ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
 198                                            walk_state, &(node));
 199                 }
 200 #endif
 201                 if (ACPI_FAILURE (status)) {
 202                         ACPI_REPORT_NSERROR (path, status);
 203                         return (status);
 204                 }
 205
 206                 /*
 207                  * Check to make sure that the target is
 208                  * one of the opcodes that actually opens a scope
 209                  */
 210                 switch (node->type) {
 211                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
 212                 case ACPI_TYPE_DEVICE:
 213                 case ACPI_TYPE_POWER:
 214                 case ACPI_TYPE_PROCESSOR:
 215                 case ACPI_TYPE_THERMAL:
 216
 217                         /* These are acceptable types */
 218                         break;
 219
 220                 case ACPI_TYPE_INTEGER:
 221                 case ACPI_TYPE_STRING:
 222                 case ACPI_TYPE_BUFFER:
 223
 224                         /*
 225                          * These types we will allow, but we will change the type.  This
 226                          * enables some existing code of the form:
 227                          *
 228                          *  Name (DEB, 0)
 229                          *  Scope (DEB) { ... }
 230                          *
 231                          * Note: silently change the type here.  On the second pass, we will report
 232                          * a warning
 233                          */
 234
 235                         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 236                                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 237                                 path, acpi_ut_get_type_name (node->type)));
 238
 239                         node->type = ACPI_TYPE_ANY;
 240                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 241                         break;
 242
 243                 default:
 244
 245                         /* All other types are an error */
 246
 247                         ACPI_REPORT_ERROR ((
 248                                 "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n",
 249                                 acpi_ut_get_type_name (node->type), path));
 250
 251                         return (AE_AML_OPERAND_TYPE);
 252                 }
 253                 break;
 254
 255
 256         default:
 257
 258                 /*
 259                  * For all other named opcodes, we will enter the name into
 260                  * the namespace.
 261                  *
 262                  * Setup the search flags.
 263                  * Since we are entering a name into the namespace, we do not want to
 264                  * enable the search-to-root upsearch.
 265                  *
 266                  * There are only two conditions where it is acceptable that the name
 267                  * already exists:
 268                  *    1) the Scope() operator can reopen a scoping object that was
 269                  *       previously defined (Scope, Method, Device, etc.)
 270                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 271                  *       buffer_field, or Package), the name of the object is already
 272                  *       in the namespace.
 273                  */
 274                 if (walk_state->deferred_node) {
 275                         /* This name is already in the namespace, get the node */
 276
 277                         node = walk_state->deferred_node;
 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, "[%s] Cannot already exist\n",
 287                                         acpi_ut_get_type_name (object_type)));
 288                 }
 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 = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 302                                   ACPI_IMODE_LOAD_PASS1, flags, walk_state, &(node));
 303                 if (ACPI_FAILURE (status)) {
 304                         ACPI_REPORT_NSERROR (path, status);
 305                         return (status);
 306                 }
 307                 break;
 308         }
 309
 310
 311         /* Common exit */
 312
 313         if (!op) {
 314                 /* Create a new op */
 315
 316                 op = acpi_ps_alloc_op (walk_state->opcode);
 317                 if (!op) {
 318                         return (AE_NO_MEMORY);
 319                 }
 320         }
 321
 322         /* Initialize */
 323
 324         op->named.name = node->name.integer;
 325
 326 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 327         op->named.path = (u8 *) path;
 328 #endif
 329
 330
 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         acpi_ps_append_arg (acpi_ps_get_parent_scope (&walk_state->parser_state), op);
 337
 338         *out_op = op;
 339         return (status);
 340 }
 341
 342
 343 /*******************************************************************************
 344  *
 345  * FUNCTION:    acpi_ds_load1_end_op
 346  *
 347  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 348  *
 349  * RETURN:      Status
 350  *
 351  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 352  *              both control methods and everything else.
 353  *
 354  ******************************************************************************/
 355
 356 acpi_status
 357 acpi_ds_load1_end_op (
 358         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
 365         ACPI_FUNCTION_NAME ("ds_load1_end_op");
 366
 367
 368         op = walk_state->op;
 369         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 370
 371         /* We are only interested in opcodes that have an associated name */
 372
 373         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 374                 return (AE_OK);
 375         }
 376
 377         /* Get the object type to determine if we should pop the scope */
 378
 379         object_type = walk_state->op_info->object_type;
 380
 381 #ifndef ACPI_NO_METHOD_EXECUTION
 382         if (walk_state->op_info->flags & AML_FIELD) {
 383                 if (walk_state->opcode == AML_FIELD_OP         ||
 384                         walk_state->opcode == AML_BANK_FIELD_OP    ||
 385                         walk_state->opcode == AML_INDEX_FIELD_OP) {
 386                         status = acpi_ds_init_field_objects (op, walk_state);
 387                 }
 388                 return (status);
 389         }
 390
 391
 392         if (op->common.aml_opcode == AML_REGION_OP) {
 393                 status = acpi_ex_create_region (op->named.data, op->named.length,
 394                                    (acpi_adr_space_type)
 395                                                  ((op->common.value.arg)->common.value.integer),
 396                                                  walk_state);
 397                 if (ACPI_FAILURE (status)) {
 398                         return (status);
 399                 }
 400         }
 401 #endif
 402
 403         if (op->common.aml_opcode == AML_NAME_OP) {
 404                 /* For Name opcode, get the object type from the argument */
 405
 406                 if (op->common.value.arg) {
 407                         object_type = (acpi_ps_get_opcode_info (
 408                                 (op->common.value.arg)->common.aml_opcode))->object_type;
 409                         op->common.node->type = (u8) object_type;
 410                 }
 411         }
 412
 413         if (op->common.aml_opcode == AML_METHOD_OP) {
 414                 /*
 415                  * method_op pkg_length name_string method_flags term_list
 416                  *
 417                  * Note: We must create the method node/object pair as soon as we
 418                  * see the method declaration.  This allows later pass1 parsing
 419                  * of invocations of the method (need to know the number of
 420                  * arguments.)
 421                  */
 422                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 423                         "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 424                         walk_state, op, op->named.node));
 425
 426                 if (!acpi_ns_get_attached_object (op->named.node)) {
 427                         walk_state->operands[0] = (void *) op->named.node;
 428                         walk_state->num_operands = 1;
 429
 430                         status = acpi_ds_create_operands (walk_state, op->common.value.arg);
 431                         if (ACPI_SUCCESS (status)) {
 432                                 status = acpi_ex_create_method (op->named.data,
 433                                                    op->named.length, walk_state);
 434                         }
 435                         walk_state->operands[0] = NULL;
 436                         walk_state->num_operands = 0;
 437
 438                         if (ACPI_FAILURE (status)) {
 439                                 return (status);
 440                         }
 441                 }
 442         }
 443
 444         /* Pop the scope stack */
 445
 446         if (acpi_ns_opens_scope (object_type)) {
 447                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
 448                         acpi_ut_get_type_name (object_type), op));
 449
 450                 status = acpi_ds_scope_stack_pop (walk_state);
 451         }
 452
 453         return (status);
 454 }
 455
 456
 457 /*******************************************************************************
 458  *
 459  * FUNCTION:    acpi_ds_load2_begin_op
 460  *
 461  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 462  *              out_op          - Wher to return op if a new one is created
 463  *
 464  * RETURN:      Status
 465  *
 466  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 467  *
 468  ******************************************************************************/
 469
 470 acpi_status
 471 acpi_ds_load2_begin_op (
 472         struct acpi_walk_state          *walk_state,
 473         union acpi_parse_object         **out_op)
 474 {
 475         union acpi_parse_object         *op;
 476         struct acpi_namespace_node      *node;
 477         acpi_status                     status;
 478         acpi_object_type                object_type;
 479         char                            *buffer_ptr;
 480
 481
 482         ACPI_FUNCTION_TRACE ("ds_load2_begin_op");
 483
 484
 485         op = walk_state->op;
 486         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 487
 488         if (op) {
 489                 /* We only care about Namespace opcodes here */
 490
 491                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 492                           (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 493                         (!(walk_state->op_info->flags & AML_NAMED))) {
 494                         return_ACPI_STATUS (AE_OK);
 495                 }
 496
 497                 /* Get the name we are going to enter or lookup in the namespace */
 498
 499                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 500                         /* For Namepath op, get the path string */
 501
 502                         buffer_ptr = op->common.value.string;
 503                         if (!buffer_ptr) {
 504                                 /* No name, just exit */
 505
 506                                 return_ACPI_STATUS (AE_OK);
 507                         }
 508                 }
 509                 else {
 510                         /* Get name from the op */
 511
 512                         buffer_ptr = (char *) &op->named.name;
 513                 }
 514         }
 515         else {
 516                 /* Get the namestring from the raw AML */
 517
 518                 buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
 519         }
 520
 521         /* Map the opcode into an internal object type */
 522
 523         object_type = walk_state->op_info->object_type;
 524
 525         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 526                 "State=%p Op=%p Type=%X\n", walk_state, op, object_type));
 527
 528
 529         switch (walk_state->opcode) {
 530         case AML_FIELD_OP:
 531         case AML_BANK_FIELD_OP:
 532         case AML_INDEX_FIELD_OP:
 533
 534                 node = NULL;
 535                 status = AE_OK;
 536                 break;
 537
 538         case AML_INT_NAMEPATH_OP:
 539
 540                 /*
 541                  * The name_path is an object reference to an existing object.
 542                  * Don't enter the name into the namespace, but look it up
 543                  * for use later.
 544                  */
 545                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 546                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 547                                   walk_state, &(node));
 548                 break;
 549
 550         case AML_SCOPE_OP:
 551
 552                 /*
 553                  * The Path is an object reference to an existing object.
 554                  * Don't enter the name into the namespace, but look it up
 555                  * for use later.
 556                  */
 557                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 558                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 559                                   walk_state, &(node));
 560                 if (ACPI_FAILURE (status)) {
 561 #ifdef _ACPI_ASL_COMPILER
 562                         if (status == AE_NOT_FOUND) {
 563                                 status = AE_OK;
 564                         }
 565                         else {
 566                                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 567                         }
 568 #else
 569                         ACPI_REPORT_NSERROR (buffer_ptr, status);
 570 #endif
 571                         return_ACPI_STATUS (status);
 572                 }
 573                 /*
 574                  * We must check to make sure that the target is
 575                  * one of the opcodes that actually opens a scope
 576                  */
 577                 switch (node->type) {
 578                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 579                 case ACPI_TYPE_DEVICE:
 580                 case ACPI_TYPE_POWER:
 581                 case ACPI_TYPE_PROCESSOR:
 582                 case ACPI_TYPE_THERMAL:
 583
 584                         /* These are acceptable types */
 585                         break;
 586
 587                 case ACPI_TYPE_INTEGER:
 588                 case ACPI_TYPE_STRING:
 589                 case ACPI_TYPE_BUFFER:
 590
 591                         /*
 592                          * These types we will allow, but we will change the type.  This
 593                          * enables some existing code of the form:
 594                          *
 595                          *  Name (DEB, 0)
 596                          *  Scope (DEB) { ... }
 597                          */
 598
 599                         ACPI_REPORT_WARNING ((
 600                                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 601                                 buffer_ptr, acpi_ut_get_type_name (node->type)));
 602
 603                         node->type = ACPI_TYPE_ANY;
 604                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 605                         break;
 606
 607                 default:
 608
 609                         /* All other types are an error */
 610
 611                         ACPI_REPORT_ERROR ((
 612                                 "Invalid type (%s) for target of Scope operator [%4.4s]\n",
 613                                 acpi_ut_get_type_name (node->type), buffer_ptr));
 614
 615                         return (AE_AML_OPERAND_TYPE);
 616                 }
 617                 break;
 618
 619         default:
 620
 621                 /* All other opcodes */
 622
 623                 if (op && op->common.node) {
 624                         /* This op/node was previously entered into the namespace */
 625
 626                         node = op->common.node;
 627
 628                         if (acpi_ns_opens_scope (object_type)) {
 629                                 status = acpi_ds_scope_stack_push (node, object_type, walk_state);
 630                                 if (ACPI_FAILURE (status)) {
 631                                         return_ACPI_STATUS (status);
 632                                 }
 633
 634                         }
 635                         return_ACPI_STATUS (AE_OK);
 636                 }
 637
 638                 /*
 639                  * Enter the named type into the internal namespace.  We enter the name
 640                  * as we go downward in the parse tree.  Any necessary subobjects that
 641                  * involve arguments to the opcode must be created as we go back up the
 642                  * parse tree later.
 643                  *
 644                  * Note: Name may already exist if we are executing a deferred opcode.
 645                  */
 646                 if (walk_state->deferred_node) {
 647                         /* This name is already in the namespace, get the node */
 648
 649                         node = walk_state->deferred_node;
 650                         status = AE_OK;
 651                         break;
 652                 }
 653
 654                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 655                                   ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH,
 656                                   walk_state, &(node));
 657                 break;
 658         }
 659
 660         if (ACPI_FAILURE (status)) {
 661                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 662                 return_ACPI_STATUS (status);
 663         }
 664
 665
 666         if (!op) {
 667                 /* Create a new op */
 668
 669                 op = acpi_ps_alloc_op (walk_state->opcode);
 670                 if (!op) {
 671                         return_ACPI_STATUS (AE_NO_MEMORY);
 672                 }
 673
 674                 /* Initialize the new op */
 675
 676                 if (node) {
 677                         op->named.name = node->name.integer;
 678                 }
 679                 if (out_op) {
 680                         *out_op = op;
 681                 }
 682         }
 683
 684         /*
 685          * Put the Node in the "op" object that the parser uses, so we
 686          * can get it again quickly when this scope is closed
 687          */
 688         op->common.node = node;
 689
 690         return_ACPI_STATUS (status);
 691 }
 692
 693
 694 /*******************************************************************************
 695  *
 696  * FUNCTION:    acpi_ds_load2_end_op
 697  *
 698  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 699  *
 700  * RETURN:      Status
 701  *
 702  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 703  *              both control methods and everything else.
 704  *
 705  ******************************************************************************/
 706
 707 acpi_status
 708 acpi_ds_load2_end_op (
 709         struct acpi_walk_state          *walk_state)
 710 {
 711         union acpi_parse_object         *op;
 712         acpi_status                     status = AE_OK;
 713         acpi_object_type                object_type;
 714         struct acpi_namespace_node      *node;
 715         union acpi_parse_object         *arg;
 716         struct acpi_namespace_node      *new_node;
 717 #ifndef ACPI_NO_METHOD_EXECUTION
 718         u32                             i;
 719 #endif
 720
 721
 722         ACPI_FUNCTION_TRACE ("ds_load2_end_op");
 723
 724         op = walk_state->op;
 725         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 726                         walk_state->op_info->name, op, walk_state));
 727
 728         /* Only interested in opcodes that have namespace objects */
 729
 730         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 731                 return_ACPI_STATUS (AE_OK);
 732         }
 733
 734         if (op->common.aml_opcode == AML_SCOPE_OP) {
 735                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 736                         "Ending scope Op=%p State=%p\n", op, walk_state));
 737         }
 738
 739
 740         object_type = walk_state->op_info->object_type;
 741
 742         /*
 743          * Get the Node/name from the earlier lookup
 744          * (It was saved in the *op structure)
 745          */
 746         node = op->common.node;
 747
 748         /*
 749          * Put the Node on the object stack (Contains the ACPI Name of
 750          * this object)
 751          */
 752         walk_state->operands[0] = (void *) node;
 753         walk_state->num_operands = 1;
 754
 755         /* Pop the scope stack */
 756
 757         if (acpi_ns_opens_scope (object_type) &&
 758            (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 759                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 760                         acpi_ut_get_type_name (object_type), op));
 761
 762                 status = acpi_ds_scope_stack_pop (walk_state);
 763                 if (ACPI_FAILURE (status)) {
 764                         goto cleanup;
 765                 }
 766         }
 767
 768         /*
 769          * Named operations are as follows:
 770          *
 771          * AML_ALIAS
 772          * AML_BANKFIELD
 773          * AML_CREATEBITFIELD
 774          * AML_CREATEBYTEFIELD
 775          * AML_CREATEDWORDFIELD
 776          * AML_CREATEFIELD
 777          * AML_CREATEQWORDFIELD
 778          * AML_CREATEWORDFIELD
 779          * AML_DATA_REGION
 780          * AML_DEVICE
 781          * AML_EVENT
 782          * AML_FIELD
 783          * AML_INDEXFIELD
 784          * AML_METHOD
 785          * AML_METHODCALL
 786          * AML_MUTEX
 787          * AML_NAME
 788          * AML_NAMEDFIELD
 789          * AML_OPREGION
 790          * AML_POWERRES
 791          * AML_PROCESSOR
 792          * AML_SCOPE
 793          * AML_THERMALZONE
 794          */
 795
 796         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 797                 "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 798                 acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));
 799
 800         /* Decode the opcode */
 801
 802         arg = op->common.value.arg;
 803
 804         switch (walk_state->op_info->type) {
 805 #ifndef ACPI_NO_METHOD_EXECUTION
 806
 807         case AML_TYPE_CREATE_FIELD:
 808
 809                 /*
 810                  * Create the field object, but the field buffer and index must
 811                  * be evaluated later during the execution phase
 812                  */
 813                 status = acpi_ds_create_buffer_field (op, walk_state);
 814                 break;
 815
 816
 817          case AML_TYPE_NAMED_FIELD:
 818
 819                 switch (op->common.aml_opcode) {
 820                 case AML_INDEX_FIELD_OP:
 821
 822                         status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
 823                                          walk_state);
 824                         break;
 825
 826                 case AML_BANK_FIELD_OP:
 827
 828                         status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
 829                         break;
 830
 831                 case AML_FIELD_OP:
 832
 833                         status = acpi_ds_create_field (op, arg->common.node, walk_state);
 834                         break;
 835
 836                 default:
 837                         /* All NAMED_FIELD opcodes must be handled above */
 838                         break;
 839                 }
 840                 break;
 841
 842
 843          case AML_TYPE_NAMED_SIMPLE:
 844
 845                 status = acpi_ds_create_operands (walk_state, arg);
 846                 if (ACPI_FAILURE (status)) {
 847                         goto cleanup;
 848                 }
 849
 850                 switch (op->common.aml_opcode) {
 851                 case AML_PROCESSOR_OP:
 852
 853                         status = acpi_ex_create_processor (walk_state);
 854                         break;
 855
 856                 case AML_POWER_RES_OP:
 857
 858                         status = acpi_ex_create_power_resource (walk_state);
 859                         break;
 860
 861                 case AML_MUTEX_OP:
 862
 863                         status = acpi_ex_create_mutex (walk_state);
 864                         break;
 865
 866                 case AML_EVENT_OP:
 867
 868                         status = acpi_ex_create_event (walk_state);
 869                         break;
 870
 871                 case AML_DATA_REGION_OP:
 872
 873                         status = acpi_ex_create_table_region (walk_state);
 874                         break;
 875
 876                 case AML_ALIAS_OP:
 877
 878                         status = acpi_ex_create_alias (walk_state);
 879                         break;
 880
 881                 default:
 882                         /* Unknown opcode */
 883
 884                         status = AE_OK;
 885                         goto cleanup;
 886                 }
 887
 888                 /* Delete operands */
 889
 890                 for (i = 1; i < walk_state->num_operands; i++) {
 891                         acpi_ut_remove_reference (walk_state->operands[i]);
 892                         walk_state->operands[i] = NULL;
 893                 }
 894
 895                 break;
 896 #endif /* ACPI_NO_METHOD_EXECUTION */
 897
 898         case AML_TYPE_NAMED_COMPLEX:
 899
 900                 switch (op->common.aml_opcode) {
 901 #ifndef ACPI_NO_METHOD_EXECUTION
 902                 case AML_REGION_OP:
 903                         /*
 904                          * The op_region is not fully parsed at this time. Only valid
 905                          * argument is the space_id. (We must save the address of the
 906                          * AML of the address and length operands)
 907                          */
 908                         /*
 909                          * If we have a valid region, initialize it
 910                          * Namespace is NOT locked at this point.
 911                          */
 912                         status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node),
 913                                          FALSE);
 914                         if (ACPI_FAILURE (status)) {
 915                                 /*
 916                                  *  If AE_NOT_EXIST is returned, it is not fatal
 917                                  *  because many regions get created before a handler
 918                                  *  is installed for said region.
 919                                  */
 920                                 if (AE_NOT_EXIST == status) {
 921                                         status = AE_OK;
 922                                 }
 923                         }
 924                         break;
 925
 926
 927                 case AML_NAME_OP:
 928
 929                         status = acpi_ds_create_node (walk_state, node, op);
 930                         break;
 931 #endif /* ACPI_NO_METHOD_EXECUTION */
 932
 933
 934                 default:
 935                         /* All NAMED_COMPLEX opcodes must be handled above */
 936                         /* Note: Method objects were already created in Pass 1 */
 937                         break;
 938                 }
 939                 break;
 940
 941
 942         case AML_CLASS_INTERNAL:
 943
 944                 /* case AML_INT_NAMEPATH_OP: */
 945                 break;
 946
 947
 948         case AML_CLASS_METHOD_CALL:
 949
 950                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 951                         "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 952                         walk_state, op, node));
 953
 954                 /*
 955                  * Lookup the method name and save the Node
 956                  */
 957                 status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
 958                                   ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 959                                   ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 960                                   walk_state, &(new_node));
 961                 if (ACPI_SUCCESS (status)) {
 962                         /*
 963                          * Make sure that what we found is indeed a method
 964                          * We didn't search for a method on purpose, to see if the name
 965                          * would resolve
 966                          */
 967                         if (new_node->type != ACPI_TYPE_METHOD) {
 968                                 status = AE_AML_OPERAND_TYPE;
 969                         }
 970
 971                         /* We could put the returned object (Node) on the object stack for
 972                          * later, but for now, we will put it in the "op" object that the
 973                          * parser uses, so we can get it again at the end of this scope
 974                          */
 975                         op->common.node = new_node;
 976                 }
 977                 else {
 978                         ACPI_REPORT_NSERROR (arg->common.value.string, status);
 979                 }
 980                 break;
 981
 982
 983         default:
 984                 break;
 985         }
 986
 987 cleanup:
 988
 989         /* Remove the Node pushed at the very beginning */
 990
 991         walk_state->operands[0] = NULL;
 992         walk_state->num_operands = 0;
 993         return_ACPI_STATUS (status);
 994 }
 995
 996