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                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 495                                 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 496                                 ACPI_REPORT_WARNING ((
 497                                         "Encountered executable code at module level, [%s]\n",
 498                                         acpi_ps_get_opcode_name (walk_state->opcode)));
 499                         }
 500                         return_ACPI_STATUS (AE_OK);
 501                 }
 502
 503                 /* Get the name we are going to enter or lookup in the namespace */
 504
 505                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 506                         /* For Namepath op, get the path string */
 507
 508                         buffer_ptr = op->common.value.string;
 509                         if (!buffer_ptr) {
 510                                 /* No name, just exit */
 511
 512                                 return_ACPI_STATUS (AE_OK);
 513                         }
 514                 }
 515                 else {
 516                         /* Get name from the op */
 517
 518                         buffer_ptr = (char *) &op->named.name;
 519                 }
 520         }
 521         else {
 522                 /* Get the namestring from the raw AML */
 523
 524                 buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
 525         }
 526
 527         /* Map the opcode into an internal object type */
 528
 529         object_type = walk_state->op_info->object_type;
 530
 531         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 532                 "State=%p Op=%p Type=%X\n", walk_state, op, object_type));
 533
 534
 535         switch (walk_state->opcode) {
 536         case AML_FIELD_OP:
 537         case AML_BANK_FIELD_OP:
 538         case AML_INDEX_FIELD_OP:
 539
 540                 node = NULL;
 541                 status = AE_OK;
 542                 break;
 543
 544         case AML_INT_NAMEPATH_OP:
 545
 546                 /*
 547                  * The name_path is an object reference to an existing object.
 548                  * Don't enter the name into the namespace, but look it up
 549                  * for use later.
 550                  */
 551                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 552                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 553                                   walk_state, &(node));
 554                 break;
 555
 556         case AML_SCOPE_OP:
 557
 558                 /*
 559                  * The Path is an object reference to an existing object.
 560                  * Don't enter the name into the namespace, but look it up
 561                  * for use later.
 562                  */
 563                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 564                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 565                                   walk_state, &(node));
 566                 if (ACPI_FAILURE (status)) {
 567 #ifdef _ACPI_ASL_COMPILER
 568                         if (status == AE_NOT_FOUND) {
 569                                 status = AE_OK;
 570                         }
 571                         else {
 572                                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 573                         }
 574 #else
 575                         ACPI_REPORT_NSERROR (buffer_ptr, status);
 576 #endif
 577                         return_ACPI_STATUS (status);
 578                 }
 579                 /*
 580                  * We must check to make sure that the target is
 581                  * one of the opcodes that actually opens a scope
 582                  */
 583                 switch (node->type) {
 584                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 585                 case ACPI_TYPE_DEVICE:
 586                 case ACPI_TYPE_POWER:
 587                 case ACPI_TYPE_PROCESSOR:
 588                 case ACPI_TYPE_THERMAL:
 589
 590                         /* These are acceptable types */
 591                         break;
 592
 593                 case ACPI_TYPE_INTEGER:
 594                 case ACPI_TYPE_STRING:
 595                 case ACPI_TYPE_BUFFER:
 596
 597                         /*
 598                          * These types we will allow, but we will change the type.  This
 599                          * enables some existing code of the form:
 600                          *
 601                          *  Name (DEB, 0)
 602                          *  Scope (DEB) { ... }
 603                          */
 604
 605                         ACPI_REPORT_WARNING ((
 606                                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 607                                 buffer_ptr, acpi_ut_get_type_name (node->type)));
 608
 609                         node->type = ACPI_TYPE_ANY;
 610                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 611                         break;
 612
 613                 default:
 614
 615                         /* All other types are an error */
 616
 617                         ACPI_REPORT_ERROR ((
 618                                 "Invalid type (%s) for target of Scope operator [%4.4s]\n",
 619                                 acpi_ut_get_type_name (node->type), buffer_ptr));
 620
 621                         return (AE_AML_OPERAND_TYPE);
 622                 }
 623                 break;
 624
 625         default:
 626
 627                 /* All other opcodes */
 628
 629                 if (op && op->common.node) {
 630                         /* This op/node was previously entered into the namespace */
 631
 632                         node = op->common.node;
 633
 634                         if (acpi_ns_opens_scope (object_type)) {
 635                                 status = acpi_ds_scope_stack_push (node, object_type, walk_state);
 636                                 if (ACPI_FAILURE (status)) {
 637                                         return_ACPI_STATUS (status);
 638                                 }
 639
 640                         }
 641                         return_ACPI_STATUS (AE_OK);
 642                 }
 643
 644                 /*
 645                  * Enter the named type into the internal namespace.  We enter the name
 646                  * as we go downward in the parse tree.  Any necessary subobjects that
 647                  * involve arguments to the opcode must be created as we go back up the
 648                  * parse tree later.
 649                  *
 650                  * Note: Name may already exist if we are executing a deferred opcode.
 651                  */
 652                 if (walk_state->deferred_node) {
 653                         /* This name is already in the namespace, get the node */
 654
 655                         node = walk_state->deferred_node;
 656                         status = AE_OK;
 657                         break;
 658                 }
 659
 660                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 661                                   ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH,
 662                                   walk_state, &(node));
 663                 break;
 664         }
 665
 666         if (ACPI_FAILURE (status)) {
 667                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 668                 return_ACPI_STATUS (status);
 669         }
 670
 671
 672         if (!op) {
 673                 /* Create a new op */
 674
 675                 op = acpi_ps_alloc_op (walk_state->opcode);
 676                 if (!op) {
 677                         return_ACPI_STATUS (AE_NO_MEMORY);
 678                 }
 679
 680                 /* Initialize the new op */
 681
 682                 if (node) {
 683                         op->named.name = node->name.integer;
 684                 }
 685                 if (out_op) {
 686                         *out_op = op;
 687                 }
 688         }
 689
 690         /*
 691          * Put the Node in the "op" object that the parser uses, so we
 692          * can get it again quickly when this scope is closed
 693          */
 694         op->common.node = node;
 695
 696         return_ACPI_STATUS (status);
 697 }
 698
 699
 700 /*******************************************************************************
 701  *
 702  * FUNCTION:    acpi_ds_load2_end_op
 703  *
 704  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 705  *
 706  * RETURN:      Status
 707  *
 708  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 709  *              both control methods and everything else.
 710  *
 711  ******************************************************************************/
 712
 713 acpi_status
 714 acpi_ds_load2_end_op (
 715         struct acpi_walk_state          *walk_state)
 716 {
 717         union acpi_parse_object         *op;
 718         acpi_status                     status = AE_OK;
 719         acpi_object_type                object_type;
 720         struct acpi_namespace_node      *node;
 721         union acpi_parse_object         *arg;
 722         struct acpi_namespace_node      *new_node;
 723 #ifndef ACPI_NO_METHOD_EXECUTION
 724         u32                             i;
 725 #endif
 726
 727
 728         ACPI_FUNCTION_TRACE ("ds_load2_end_op");
 729
 730         op = walk_state->op;
 731         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 732                         walk_state->op_info->name, op, walk_state));
 733
 734         /* Only interested in opcodes that have namespace objects */
 735
 736         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 737                 return_ACPI_STATUS (AE_OK);
 738         }
 739
 740         if (op->common.aml_opcode == AML_SCOPE_OP) {
 741                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 742                         "Ending scope Op=%p State=%p\n", op, walk_state));
 743         }
 744
 745
 746         object_type = walk_state->op_info->object_type;
 747
 748         /*
 749          * Get the Node/name from the earlier lookup
 750          * (It was saved in the *op structure)
 751          */
 752         node = op->common.node;
 753
 754         /*
 755          * Put the Node on the object stack (Contains the ACPI Name of
 756          * this object)
 757          */
 758         walk_state->operands[0] = (void *) node;
 759         walk_state->num_operands = 1;
 760
 761         /* Pop the scope stack */
 762
 763         if (acpi_ns_opens_scope (object_type) &&
 764            (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 765                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 766                         acpi_ut_get_type_name (object_type), op));
 767
 768                 status = acpi_ds_scope_stack_pop (walk_state);
 769                 if (ACPI_FAILURE (status)) {
 770                         goto cleanup;
 771                 }
 772         }
 773
 774         /*
 775          * Named operations are as follows:
 776          *
 777          * AML_ALIAS
 778          * AML_BANKFIELD
 779          * AML_CREATEBITFIELD
 780          * AML_CREATEBYTEFIELD
 781          * AML_CREATEDWORDFIELD
 782          * AML_CREATEFIELD
 783          * AML_CREATEQWORDFIELD
 784          * AML_CREATEWORDFIELD
 785          * AML_DATA_REGION
 786          * AML_DEVICE
 787          * AML_EVENT
 788          * AML_FIELD
 789          * AML_INDEXFIELD
 790          * AML_METHOD
 791          * AML_METHODCALL
 792          * AML_MUTEX
 793          * AML_NAME
 794          * AML_NAMEDFIELD
 795          * AML_OPREGION
 796          * AML_POWERRES
 797          * AML_PROCESSOR
 798          * AML_SCOPE
 799          * AML_THERMALZONE
 800          */
 801
 802         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 803                 "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 804                 acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));
 805
 806         /* Decode the opcode */
 807
 808         arg = op->common.value.arg;
 809
 810         switch (walk_state->op_info->type) {
 811 #ifndef ACPI_NO_METHOD_EXECUTION
 812
 813         case AML_TYPE_CREATE_FIELD:
 814
 815                 /*
 816                  * Create the field object, but the field buffer and index must
 817                  * be evaluated later during the execution phase
 818                  */
 819                 status = acpi_ds_create_buffer_field (op, walk_state);
 820                 break;
 821
 822
 823          case AML_TYPE_NAMED_FIELD:
 824
 825                 switch (op->common.aml_opcode) {
 826                 case AML_INDEX_FIELD_OP:
 827
 828                         status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
 829                                          walk_state);
 830                         break;
 831
 832                 case AML_BANK_FIELD_OP:
 833
 834                         status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
 835                         break;
 836
 837                 case AML_FIELD_OP:
 838
 839                         status = acpi_ds_create_field (op, arg->common.node, walk_state);
 840                         break;
 841
 842                 default:
 843                         /* All NAMED_FIELD opcodes must be handled above */
 844                         break;
 845                 }
 846                 break;
 847
 848
 849          case AML_TYPE_NAMED_SIMPLE:
 850
 851                 status = acpi_ds_create_operands (walk_state, arg);
 852                 if (ACPI_FAILURE (status)) {
 853                         goto cleanup;
 854                 }
 855
 856                 switch (op->common.aml_opcode) {
 857                 case AML_PROCESSOR_OP:
 858
 859                         status = acpi_ex_create_processor (walk_state);
 860                         break;
 861
 862                 case AML_POWER_RES_OP:
 863
 864                         status = acpi_ex_create_power_resource (walk_state);
 865                         break;
 866
 867                 case AML_MUTEX_OP:
 868
 869                         status = acpi_ex_create_mutex (walk_state);
 870                         break;
 871
 872                 case AML_EVENT_OP:
 873
 874                         status = acpi_ex_create_event (walk_state);
 875                         break;
 876
 877                 case AML_DATA_REGION_OP:
 878
 879                         status = acpi_ex_create_table_region (walk_state);
 880                         break;
 881
 882                 case AML_ALIAS_OP:
 883
 884                         status = acpi_ex_create_alias (walk_state);
 885                         break;
 886
 887                 default:
 888                         /* Unknown opcode */
 889
 890                         status = AE_OK;
 891                         goto cleanup;
 892                 }
 893
 894                 /* Delete operands */
 895
 896                 for (i = 1; i < walk_state->num_operands; i++) {
 897                         acpi_ut_remove_reference (walk_state->operands[i]);
 898                         walk_state->operands[i] = NULL;
 899                 }
 900
 901                 break;
 902 #endif /* ACPI_NO_METHOD_EXECUTION */
 903
 904         case AML_TYPE_NAMED_COMPLEX:
 905
 906                 switch (op->common.aml_opcode) {
 907 #ifndef ACPI_NO_METHOD_EXECUTION
 908                 case AML_REGION_OP:
 909                         /*
 910                          * The op_region is not fully parsed at this time. Only valid
 911                          * argument is the space_id. (We must save the address of the
 912                          * AML of the address and length operands)
 913                          */
 914                         /*
 915                          * If we have a valid region, initialize it
 916                          * Namespace is NOT locked at this point.
 917                          */
 918                         status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node),
 919                                          FALSE);
 920                         if (ACPI_FAILURE (status)) {
 921                                 /*
 922                                  *  If AE_NOT_EXIST is returned, it is not fatal
 923                                  *  because many regions get created before a handler
 924                                  *  is installed for said region.
 925                                  */
 926                                 if (AE_NOT_EXIST == status) {
 927                                         status = AE_OK;
 928                                 }
 929                         }
 930                         break;
 931
 932
 933                 case AML_NAME_OP:
 934
 935                         status = acpi_ds_create_node (walk_state, node, op);
 936                         break;
 937 #endif /* ACPI_NO_METHOD_EXECUTION */
 938
 939
 940                 default:
 941                         /* All NAMED_COMPLEX opcodes must be handled above */
 942                         /* Note: Method objects were already created in Pass 1 */
 943                         break;
 944                 }
 945                 break;
 946
 947
 948         case AML_CLASS_INTERNAL:
 949
 950                 /* case AML_INT_NAMEPATH_OP: */
 951                 break;
 952
 953
 954         case AML_CLASS_METHOD_CALL:
 955
 956                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 957                         "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 958                         walk_state, op, node));
 959
 960                 /*
 961                  * Lookup the method name and save the Node
 962                  */
 963                 status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
 964                                   ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 965                                   ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 966                                   walk_state, &(new_node));
 967                 if (ACPI_SUCCESS (status)) {
 968                         /*
 969                          * Make sure that what we found is indeed a method
 970                          * We didn't search for a method on purpose, to see if the name
 971                          * would resolve
 972                          */
 973                         if (new_node->type != ACPI_TYPE_METHOD) {
 974                                 status = AE_AML_OPERAND_TYPE;
 975                         }
 976
 977                         /* We could put the returned object (Node) on the object stack for
 978                          * later, but for now, we will put it in the "op" object that the
 979                          * parser uses, so we can get it again at the end of this scope
 980                          */
 981                         op->common.node = new_node;
 982                 }
 983                 else {
 984                         ACPI_REPORT_NSERROR (arg->common.value.string, status);
 985                 }
 986                 break;
 987
 988
 989         default:
 990                 break;
 991         }
 992
 993 cleanup:
 994
 995         /* Remove the Node pushed at the very beginning */
 996
 997         walk_state->operands[0] = NULL;
 998         walk_state->num_operands = 0;
 999         return_ACPI_STATUS (status);
1000 }
1001
1002