drivers/acpi/dispatcher/dswload.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload - Dispatcher namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2004, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/acparser.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/acdispat.h>
  49 #include <acpi/acinterp.h>
  50 #include <acpi/acnamesp.h>
  51 #include <acpi/acevents.h>
  52
  53 #ifdef _ACPI_ASL_COMPILER
  54 #include <acpi/acdisasm.h>
  55 #endif
  56
  57 #define _COMPONENT          ACPI_DISPATCHER
  58          ACPI_MODULE_NAME    ("dswload")
  59
  60
  61 /*******************************************************************************
  62  *
  63  * FUNCTION:    acpi_ds_init_callbacks
  64  *
  65  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  66  *              pass_number     - 1, 2, or 3
  67  *
  68  * RETURN:      Status
  69  *
  70  * DESCRIPTION: Init walk state callbacks
  71  *
  72  ******************************************************************************/
  73
  74 acpi_status
  75 acpi_ds_init_callbacks (
  76         struct acpi_walk_state          *walk_state,
  77         u32                             pass_number)
  78 {
  79
  80         switch (pass_number) {
  81         case 1:
  82                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE;
  83                 walk_state->descending_callback = acpi_ds_load1_begin_op;
  84                 walk_state->ascending_callback = acpi_ds_load1_end_op;
  85                 break;
  86
  87         case 2:
  88                 walk_state->parse_flags       = ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE;
  89                 walk_state->descending_callback = acpi_ds_load2_begin_op;
  90                 walk_state->ascending_callback = acpi_ds_load2_end_op;
  91                 break;
  92
  93         case 3:
  94 #ifndef ACPI_NO_METHOD_EXECUTION
  95                 walk_state->parse_flags      |= ACPI_PARSE_EXECUTE  | ACPI_PARSE_DELETE_TREE;
  96                 walk_state->descending_callback = acpi_ds_exec_begin_op;
  97                 walk_state->ascending_callback = acpi_ds_exec_end_op;
  98 #endif
  99                 break;
 100
 101         default:
 102                 return (AE_BAD_PARAMETER);
 103         }
 104
 105         return (AE_OK);
 106 }
 107
 108
 109 /*******************************************************************************
 110  *
 111  * FUNCTION:    acpi_ds_load1_begin_op
 112  *
 113  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 114  *              Op              - Op that has been just been reached in the
 115  *                                walk;  Arguments have not been evaluated yet.
 116  *
 117  * RETURN:      Status
 118  *
 119  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 120  *
 121  ******************************************************************************/
 122
 123 acpi_status
 124 acpi_ds_load1_begin_op (
 125         struct acpi_walk_state          *walk_state,
 126         union acpi_parse_object         **out_op)
 127 {
 128         union acpi_parse_object         *op;
 129         struct acpi_namespace_node      *node;
 130         acpi_status                     status;
 131         acpi_object_type                object_type;
 132         char                            *path;
 133         u32                             flags;
 134
 135
 136         ACPI_FUNCTION_NAME ("ds_load1_begin_op");
 137
 138
 139         op = walk_state->op;
 140         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 141
 142         /* We are only interested in opcodes that have an associated name */
 143
 144         if (op) {
 145                 if (!(walk_state->op_info->flags & AML_NAMED)) {
 146 #if 0
 147                         if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 148                                 (walk_state->op_info->class == AML_CLASS_CONTROL)) {
 149                                 acpi_os_printf ("\n\n***EXECUTABLE OPCODE %s***\n\n", walk_state->op_info->name);
 150                                 *out_op = op;
 151                                 return (AE_CTRL_SKIP);
 152                         }
 153 #endif
 154                         *out_op = op;
 155                         return (AE_OK);
 156                 }
 157
 158                 /* Check if this object has already been installed in the namespace */
 159
 160                 if (op->common.node) {
 161                         *out_op = op;
 162                         return (AE_OK);
 163                 }
 164         }
 165
 166         path = acpi_ps_get_next_namestring (&walk_state->parser_state);
 167
 168         /* Map the raw opcode into an internal object type */
 169
 170         object_type = walk_state->op_info->object_type;
 171
 172         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 173                 "State=%p Op=%p [%s]\n", walk_state, op, acpi_ut_get_type_name (object_type)));
 174
 175         switch (walk_state->opcode) {
 176         case AML_SCOPE_OP:
 177
 178                 /*
 179                  * The target name of the Scope() operator must exist at this point so
 180                  * that we can actually open the scope to enter new names underneath it.
 181                  * Allow search-to-root for single namesegs.
 182                  */
 183                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 184                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 185                 if (ACPI_FAILURE (status)) {
 186 #ifdef _ACPI_ASL_COMPILER
 187                         if (status == AE_NOT_FOUND) {
 188                                 acpi_dm_add_to_external_list (path);
 189                                 status = AE_OK;
 190                         }
 191                         else {
 192                                 ACPI_REPORT_NSERROR (path, status);
 193                         }
 194 #else
 195                         ACPI_REPORT_NSERROR (path, status);
 196 #endif
 197                         return (status);
 198                 }
 199
 200                 /*
 201                  * Check to make sure that the target is
 202                  * one of the opcodes that actually opens a scope
 203                  */
 204                 switch (node->type) {
 205                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
 206                 case ACPI_TYPE_DEVICE:
 207                 case ACPI_TYPE_POWER:
 208                 case ACPI_TYPE_PROCESSOR:
 209                 case ACPI_TYPE_THERMAL:
 210
 211                         /* These are acceptable types */
 212                         break;
 213
 214                 case ACPI_TYPE_INTEGER:
 215                 case ACPI_TYPE_STRING:
 216                 case ACPI_TYPE_BUFFER:
 217
 218                         /*
 219                          * These types we will allow, but we will change the type.  This
 220                          * enables some existing code of the form:
 221                          *
 222                          *  Name (DEB, 0)
 223                          *  Scope (DEB) { ... }
 224                          *
 225                          * Note: silently change the type here.  On the second pass, we will report a warning
 226                          */
 227
 228                         ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 229                                 path, acpi_ut_get_type_name (node->type)));
 230
 231                         node->type = ACPI_TYPE_ANY;
 232                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 233                         break;
 234
 235                 default:
 236
 237                         /* All other types are an error */
 238
 239                         ACPI_REPORT_ERROR (("Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n",
 240                                 acpi_ut_get_type_name (node->type), path));
 241
 242                         return (AE_AML_OPERAND_TYPE);
 243                 }
 244                 break;
 245
 246
 247         default:
 248
 249                 /*
 250                  * For all other named opcodes, we will enter the name into the namespace.
 251                  *
 252                  * Setup the search flags.
 253                  * Since we are entering a name into the namespace, we do not want to
 254                  * enable the search-to-root upsearch.
 255                  *
 256                  * There are only two conditions where it is acceptable that the name
 257                  * already exists:
 258                  *    1) the Scope() operator can reopen a scoping object that was
 259                  *       previously defined (Scope, Method, Device, etc.)
 260                  *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 261                  *       buffer_field, or Package), the name of the object is already
 262                  *       in the namespace.
 263                  */
 264                 if (walk_state->deferred_node) {
 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                 flags = ACPI_NS_NO_UPSEARCH;
 273                 if ((walk_state->opcode != AML_SCOPE_OP) &&
 274                         (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 275                         flags |= ACPI_NS_ERROR_IF_FOUND;
 276                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
 277                                         acpi_ut_get_type_name (object_type)));
 278                 }
 279                 else {
 280                         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Both Find or Create allowed\n",
 281                                         acpi_ut_get_type_name (object_type)));
 282                 }
 283
 284                 /*
 285                  * Enter the named type into the internal namespace.  We enter the name
 286                  * as we go downward in the parse tree.  Any necessary subobjects that involve
 287                  * arguments to the opcode must be created as we go back up the parse tree later.
 288                  */
 289                 status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
 290                                   ACPI_IMODE_LOAD_PASS1, flags, walk_state, &(node));
 291                 if (ACPI_FAILURE (status)) {
 292                         ACPI_REPORT_NSERROR (path, status);
 293                         return (status);
 294                 }
 295                 break;
 296         }
 297
 298
 299         /* Common exit */
 300
 301         if (!op) {
 302                 /* Create a new op */
 303
 304                 op = acpi_ps_alloc_op (walk_state->opcode);
 305                 if (!op) {
 306                         return (AE_NO_MEMORY);
 307                 }
 308         }
 309
 310         /* Initialize */
 311
 312         op->named.name = node->name.integer;
 313
 314 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
 315         op->named.path = (u8 *) path;
 316 #endif
 317
 318
 319         /*
 320          * Put the Node in the "op" object that the parser uses, so we
 321          * can get it again quickly when this scope is closed
 322          */
 323         op->common.node = node;
 324         acpi_ps_append_arg (acpi_ps_get_parent_scope (&walk_state->parser_state), op);
 325
 326         *out_op = op;
 327         return (status);
 328 }
 329
 330
 331 /*******************************************************************************
 332  *
 333  * FUNCTION:    acpi_ds_load1_end_op
 334  *
 335  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 336  *              Op              - Op that has been just been completed in the
 337  *                                walk;  Arguments have now been evaluated.
 338  *
 339  * RETURN:      Status
 340  *
 341  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 342  *              both control methods and everything else.
 343  *
 344  ******************************************************************************/
 345
 346 acpi_status
 347 acpi_ds_load1_end_op (
 348         struct acpi_walk_state          *walk_state)
 349 {
 350         union acpi_parse_object         *op;
 351         acpi_object_type                object_type;
 352         acpi_status                     status = AE_OK;
 353
 354
 355         ACPI_FUNCTION_NAME ("ds_load1_end_op");
 356
 357
 358         op = walk_state->op;
 359         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 360
 361         /* We are only interested in opcodes that have an associated name */
 362
 363         if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 364                 return (AE_OK);
 365         }
 366
 367         /* Get the object type to determine if we should pop the scope */
 368
 369         object_type = walk_state->op_info->object_type;
 370
 371 #ifndef ACPI_NO_METHOD_EXECUTION
 372         if (walk_state->op_info->flags & AML_FIELD) {
 373                 if (walk_state->opcode == AML_FIELD_OP         ||
 374                         walk_state->opcode == AML_BANK_FIELD_OP    ||
 375                         walk_state->opcode == AML_INDEX_FIELD_OP) {
 376                         status = acpi_ds_init_field_objects (op, walk_state);
 377                 }
 378                 return (status);
 379         }
 380
 381
 382         if (op->common.aml_opcode == AML_REGION_OP) {
 383                 status = acpi_ex_create_region (op->named.data, op->named.length,
 384                                    (acpi_adr_space_type) ((op->common.value.arg)->common.value.integer), walk_state);
 385                 if (ACPI_FAILURE (status)) {
 386                         return (status);
 387                 }
 388         }
 389 #endif
 390
 391         if (op->common.aml_opcode == AML_NAME_OP) {
 392                 /* For Name opcode, get the object type from the argument */
 393
 394                 if (op->common.value.arg) {
 395                         object_type = (acpi_ps_get_opcode_info ((op->common.value.arg)->common.aml_opcode))->object_type;
 396                         op->common.node->type = (u8) object_type;
 397                 }
 398         }
 399
 400         if (op->common.aml_opcode == AML_METHOD_OP) {
 401                 /*
 402                  * method_op pkg_length name_string method_flags term_list
 403                  *
 404                  * Note: We must create the method node/object pair as soon as we
 405                  * see the method declaration.  This allows later pass1 parsing
 406                  * of invocations of the method (need to know the number of
 407                  * arguments.)
 408                  */
 409                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 410                         "LOADING-Method: State=%p Op=%p named_obj=%p\n",
 411                         walk_state, op, op->named.node));
 412
 413                 if (!acpi_ns_get_attached_object (op->named.node)) {
 414                         walk_state->operands[0] = (void *) op->named.node;
 415                         walk_state->num_operands = 1;
 416
 417                         status = acpi_ds_create_operands (walk_state, op->common.value.arg);
 418                         if (ACPI_SUCCESS (status)) {
 419                                 status = acpi_ex_create_method (op->named.data,
 420                                                    op->named.length, walk_state);
 421                         }
 422                         walk_state->operands[0] = NULL;
 423                         walk_state->num_operands = 0;
 424
 425                         if (ACPI_FAILURE (status)) {
 426                                 return (status);
 427                         }
 428                 }
 429         }
 430
 431         /* Pop the scope stack */
 432
 433         if (acpi_ns_opens_scope (object_type)) {
 434                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
 435                         acpi_ut_get_type_name (object_type), op));
 436
 437                 status = acpi_ds_scope_stack_pop (walk_state);
 438         }
 439
 440         return (status);
 441 }
 442
 443
 444 /*******************************************************************************
 445  *
 446  * FUNCTION:    acpi_ds_load2_begin_op
 447  *
 448  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 449  *              Op              - Op that has been just been reached in the
 450  *                                walk;  Arguments have not been evaluated yet.
 451  *
 452  * RETURN:      Status
 453  *
 454  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 455  *
 456  ******************************************************************************/
 457
 458 acpi_status
 459 acpi_ds_load2_begin_op (
 460         struct acpi_walk_state          *walk_state,
 461         union acpi_parse_object         **out_op)
 462 {
 463         union acpi_parse_object         *op;
 464         struct acpi_namespace_node      *node;
 465         acpi_status                     status;
 466         acpi_object_type                object_type;
 467         char                            *buffer_ptr;
 468
 469
 470         ACPI_FUNCTION_TRACE ("ds_load2_begin_op");
 471
 472
 473         op = walk_state->op;
 474         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
 475
 476         if (op) {
 477                 /* We only care about Namespace opcodes here */
 478
 479                 if ((!(walk_state->op_info->flags & AML_NSOPCODE) && (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 480                         (!(walk_state->op_info->flags & AML_NAMED))) {
 481                         return_ACPI_STATUS (AE_OK);
 482                 }
 483
 484                 /*
 485                  * Get the name we are going to enter or lookup in the namespace
 486                  */
 487                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 488                         /* For Namepath op, get the path string */
 489
 490                         buffer_ptr = op->common.value.string;
 491                         if (!buffer_ptr) {
 492                                 /* No name, just exit */
 493
 494                                 return_ACPI_STATUS (AE_OK);
 495                         }
 496                 }
 497                 else {
 498                         /* Get name from the op */
 499
 500                         buffer_ptr = (char *) &op->named.name;
 501                 }
 502         }
 503         else {
 504                 /* Get the namestring from the raw AML */
 505
 506                 buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
 507         }
 508
 509         /* Map the opcode into an internal object type */
 510
 511         object_type = walk_state->op_info->object_type;
 512
 513         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 514                 "State=%p Op=%p Type=%X\n", walk_state, op, object_type));
 515
 516
 517         switch (walk_state->opcode) {
 518         case AML_FIELD_OP:
 519         case AML_BANK_FIELD_OP:
 520         case AML_INDEX_FIELD_OP:
 521
 522                 node = NULL;
 523                 status = AE_OK;
 524                 break;
 525
 526         case AML_INT_NAMEPATH_OP:
 527
 528                 /*
 529                  * The name_path is an object reference to an existing object. Don't enter the
 530                  * name into the namespace, but look it up for use later
 531                  */
 532                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 533                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 534                 break;
 535
 536         case AML_SCOPE_OP:
 537
 538                 /*
 539                  * The Path is an object reference to an existing object.  Don't enter the
 540                  * name into the namespace, but look it up for use later
 541                  */
 542                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 543                                   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
 544                 if (ACPI_FAILURE (status)) {
 545 #ifdef _ACPI_ASL_COMPILER
 546                         if (status == AE_NOT_FOUND) {
 547                                 status = AE_OK;
 548                         }
 549                         else {
 550                                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 551                         }
 552 #else
 553                         ACPI_REPORT_NSERROR (buffer_ptr, status);
 554 #endif
 555                         return_ACPI_STATUS (status);
 556                 }
 557                 /*
 558                  * We must check to make sure that the target is
 559                  * one of the opcodes that actually opens a scope
 560                  */
 561                 switch (node->type) {
 562                 case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 563                 case ACPI_TYPE_DEVICE:
 564                 case ACPI_TYPE_POWER:
 565                 case ACPI_TYPE_PROCESSOR:
 566                 case ACPI_TYPE_THERMAL:
 567
 568                         /* These are acceptable types */
 569                         break;
 570
 571                 case ACPI_TYPE_INTEGER:
 572                 case ACPI_TYPE_STRING:
 573                 case ACPI_TYPE_BUFFER:
 574
 575                         /*
 576                          * These types we will allow, but we will change the type.  This
 577                          * enables some existing code of the form:
 578                          *
 579                          *  Name (DEB, 0)
 580                          *  Scope (DEB) { ... }
 581                          */
 582
 583                         ACPI_REPORT_WARNING (("Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
 584                                 buffer_ptr, acpi_ut_get_type_name (node->type)));
 585
 586                         node->type = ACPI_TYPE_ANY;
 587                         walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 588                         break;
 589
 590                 default:
 591
 592                         /* All other types are an error */
 593
 594                         ACPI_REPORT_ERROR (("Invalid type (%s) for target of Scope operator [%4.4s]\n",
 595                                 acpi_ut_get_type_name (node->type), buffer_ptr));
 596
 597                         return (AE_AML_OPERAND_TYPE);
 598                 }
 599                 break;
 600
 601         default:
 602
 603                 /* All other opcodes */
 604
 605                 if (op && op->common.node) {
 606                         /* This op/node was previously entered into the namespace */
 607
 608                         node = op->common.node;
 609
 610                         if (acpi_ns_opens_scope (object_type)) {
 611                                 status = acpi_ds_scope_stack_push (node, object_type, walk_state);
 612                                 if (ACPI_FAILURE (status)) {
 613                                         return_ACPI_STATUS (status);
 614                                 }
 615
 616                         }
 617                         return_ACPI_STATUS (AE_OK);
 618                 }
 619
 620                 /*
 621                  * Enter the named type into the internal namespace.  We enter the name
 622                  * as we go downward in the parse tree.  Any necessary subobjects that involve
 623                  * arguments to the opcode must be created as we go back up the parse tree later.
 624                  *
 625                  * Note: Name may already exist if we are executing a deferred opcode.
 626                  */
 627                 if (walk_state->deferred_node) {
 628                         /* This name is already in the namespace, get the node */
 629
 630                         node = walk_state->deferred_node;
 631                         status = AE_OK;
 632                         break;
 633                 }
 634
 635                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
 636                                   ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, walk_state, &(node));
 637                 break;
 638         }
 639
 640         if (ACPI_FAILURE (status)) {
 641                 ACPI_REPORT_NSERROR (buffer_ptr, status);
 642                 return_ACPI_STATUS (status);
 643         }
 644
 645
 646         if (!op) {
 647                 /* Create a new op */
 648
 649                 op = acpi_ps_alloc_op (walk_state->opcode);
 650                 if (!op) {
 651                         return_ACPI_STATUS (AE_NO_MEMORY);
 652                 }
 653
 654                 /* Initialize the new op */
 655
 656                 if (node) {
 657                         op->named.name = node->name.integer;
 658                 }
 659                 if (out_op) {
 660                         *out_op = op;
 661                 }
 662         }
 663
 664         /*
 665          * Put the Node in the "op" object that the parser uses, so we
 666          * can get it again quickly when this scope is closed
 667          */
 668         op->common.node = node;
 669
 670         return_ACPI_STATUS (status);
 671 }
 672
 673
 674 /*******************************************************************************
 675  *
 676  * FUNCTION:    acpi_ds_load2_end_op
 677  *
 678  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 679  *              Op              - Op that has been just been completed in the
 680  *                                walk;  Arguments have now been evaluated.
 681  *
 682  * RETURN:      Status
 683  *
 684  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 685  *              both control methods and everything else.
 686  *
 687  ******************************************************************************/
 688
 689 acpi_status
 690 acpi_ds_load2_end_op (
 691         struct acpi_walk_state          *walk_state)
 692 {
 693         union acpi_parse_object         *op;
 694         acpi_status                     status = AE_OK;
 695         acpi_object_type                object_type;
 696         struct acpi_namespace_node      *node;
 697         union acpi_parse_object         *arg;
 698         struct acpi_namespace_node      *new_node;
 699 #ifndef ACPI_NO_METHOD_EXECUTION
 700         u32                             i;
 701 #endif
 702
 703
 704         ACPI_FUNCTION_TRACE ("ds_load2_end_op");
 705
 706         op = walk_state->op;
 707         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 708                         walk_state->op_info->name, op, walk_state));
 709
 710         /* Only interested in opcodes that have namespace objects */
 711
 712         if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 713                 return_ACPI_STATUS (AE_OK);
 714         }
 715
 716         if (op->common.aml_opcode == AML_SCOPE_OP) {
 717                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 718                         "Ending scope Op=%p State=%p\n", op, walk_state));
 719         }
 720
 721
 722         object_type = walk_state->op_info->object_type;
 723
 724         /*
 725          * Get the Node/name from the earlier lookup
 726          * (It was saved in the *op structure)
 727          */
 728         node = op->common.node;
 729
 730         /*
 731          * Put the Node on the object stack (Contains the ACPI Name of
 732          * this object)
 733          */
 734         walk_state->operands[0] = (void *) node;
 735         walk_state->num_operands = 1;
 736
 737         /* Pop the scope stack */
 738
 739         if (acpi_ns_opens_scope (object_type) && (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
 740                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 741                         acpi_ut_get_type_name (object_type), op));
 742
 743                 status = acpi_ds_scope_stack_pop (walk_state);
 744                 if (ACPI_FAILURE (status)) {
 745                         goto cleanup;
 746                 }
 747         }
 748
 749         /*
 750          * Named operations are as follows:
 751          *
 752          * AML_ALIAS
 753          * AML_BANKFIELD
 754          * AML_CREATEBITFIELD
 755          * AML_CREATEBYTEFIELD
 756          * AML_CREATEDWORDFIELD
 757          * AML_CREATEFIELD
 758          * AML_CREATEQWORDFIELD
 759          * AML_CREATEWORDFIELD
 760          * AML_DATA_REGION
 761          * AML_DEVICE
 762          * AML_EVENT
 763          * AML_FIELD
 764          * AML_INDEXFIELD
 765          * AML_METHOD
 766          * AML_METHODCALL
 767          * AML_MUTEX
 768          * AML_NAME
 769          * AML_NAMEDFIELD
 770          * AML_OPREGION
 771          * AML_POWERRES
 772          * AML_PROCESSOR
 773          * AML_SCOPE
 774          * AML_THERMALZONE
 775          */
 776
 777         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 778                 "Create-Load [%s] State=%p Op=%p named_obj=%p\n",
 779                 acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));
 780
 781         /* Decode the opcode */
 782
 783         arg = op->common.value.arg;
 784
 785         switch (walk_state->op_info->type) {
 786 #ifndef ACPI_NO_METHOD_EXECUTION
 787
 788         case AML_TYPE_CREATE_FIELD:
 789
 790                 /*
 791                  * Create the field object, but the field buffer and index must
 792                  * be evaluated later during the execution phase
 793                  */
 794                 status = acpi_ds_create_buffer_field (op, walk_state);
 795                 break;
 796
 797
 798          case AML_TYPE_NAMED_FIELD:
 799
 800                 switch (op->common.aml_opcode) {
 801                 case AML_INDEX_FIELD_OP:
 802
 803                         status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
 804                                            walk_state);
 805                         break;
 806
 807                 case AML_BANK_FIELD_OP:
 808
 809                         status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
 810                         break;
 811
 812                 case AML_FIELD_OP:
 813
 814                         status = acpi_ds_create_field (op, arg->common.node, walk_state);
 815                         break;
 816
 817                 default:
 818                         /* All NAMED_FIELD opcodes must be handled above */
 819                         break;
 820                 }
 821                 break;
 822
 823
 824          case AML_TYPE_NAMED_SIMPLE:
 825
 826                 status = acpi_ds_create_operands (walk_state, arg);
 827                 if (ACPI_FAILURE (status)) {
 828                         goto cleanup;
 829                 }
 830
 831                 switch (op->common.aml_opcode) {
 832                 case AML_PROCESSOR_OP:
 833
 834                         status = acpi_ex_create_processor (walk_state);
 835                         break;
 836
 837                 case AML_POWER_RES_OP:
 838
 839                         status = acpi_ex_create_power_resource (walk_state);
 840                         break;
 841
 842                 case AML_MUTEX_OP:
 843
 844                         status = acpi_ex_create_mutex (walk_state);
 845                         break;
 846
 847                 case AML_EVENT_OP:
 848
 849                         status = acpi_ex_create_event (walk_state);
 850                         break;
 851
 852                 case AML_DATA_REGION_OP:
 853
 854                         status = acpi_ex_create_table_region (walk_state);
 855                         break;
 856
 857                 case AML_ALIAS_OP:
 858
 859                         status = acpi_ex_create_alias (walk_state);
 860                         break;
 861
 862                 default:
 863                         /* Unknown opcode */
 864
 865                         status = AE_OK;
 866                         goto cleanup;
 867                 }
 868
 869                 /* Delete operands */
 870
 871                 for (i = 1; i < walk_state->num_operands; i++) {
 872                         acpi_ut_remove_reference (walk_state->operands[i]);
 873                         walk_state->operands[i] = NULL;
 874                 }
 875
 876                 break;
 877 #endif /* ACPI_NO_METHOD_EXECUTION */
 878
 879         case AML_TYPE_NAMED_COMPLEX:
 880
 881                 switch (op->common.aml_opcode) {
 882 #ifndef ACPI_NO_METHOD_EXECUTION
 883                 case AML_REGION_OP:
 884                         /*
 885                          * The op_region is not fully parsed at this time. Only valid argument is the space_id.
 886                          * (We must save the address of the AML of the address and length operands)
 887                          */
 888                         /*
 889                          * If we have a valid region, initialize it
 890                          * Namespace is NOT locked at this point.
 891                          */
 892                         status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node), FALSE);
 893                         if (ACPI_FAILURE (status)) {
 894                                 /*
 895                                  *  If AE_NOT_EXIST is returned, it is not fatal
 896                                  *  because many regions get created before a handler
 897                                  *  is installed for said region.
 898                                  */
 899                                 if (AE_NOT_EXIST == status) {
 900                                         status = AE_OK;
 901                                 }
 902                         }
 903                         break;
 904
 905
 906                 case AML_NAME_OP:
 907
 908                         status = acpi_ds_create_node (walk_state, node, op);
 909                         break;
 910 #endif /* ACPI_NO_METHOD_EXECUTION */
 911
 912
 913                 default:
 914                         /* All NAMED_COMPLEX opcodes must be handled above */
 915                         /* Note: Method objects were already created in Pass 1 */
 916                         break;
 917                 }
 918                 break;
 919
 920
 921         case AML_CLASS_INTERNAL:
 922
 923                 /* case AML_INT_NAMEPATH_OP: */
 924                 break;
 925
 926
 927         case AML_CLASS_METHOD_CALL:
 928
 929                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 930                         "RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
 931                         walk_state, op, node));
 932
 933                 /*
 934                  * Lookup the method name and save the Node
 935                  */
 936                 status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
 937                                   ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 938                                   ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 939                                   walk_state, &(new_node));
 940                 if (ACPI_SUCCESS (status)) {
 941                         /*
 942                          * Make sure that what we found is indeed a method
 943                          * We didn't search for a method on purpose, to see if the name would resolve
 944                          */
 945                         if (new_node->type != ACPI_TYPE_METHOD) {
 946                                 status = AE_AML_OPERAND_TYPE;
 947                         }
 948
 949                         /* We could put the returned object (Node) on the object stack for later, but
 950                          * for now, we will put it in the "op" object that the parser uses, so we
 951                          * can get it again at the end of this scope
 952                          */
 953                         op->common.node = new_node;
 954                 }
 955                 else {
 956                         ACPI_REPORT_NSERROR (arg->common.value.string, status);
 957                 }
 958                 break;
 959
 960
 961         default:
 962                 break;
 963         }
 964
 965 cleanup:
 966
 967         /* Remove the Node pushed at the very beginning */
 968
 969         walk_state->operands[0] = NULL;
 970         walk_state->num_operands = 0;
 971         return_ACPI_STATUS (status);
 972 }
 973
 974