drivers/bus/acpi/dispatcher/dswload.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload - Dispatcher namespace load callbacks
   4  *              $Revision$
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  *  Copyright (C) 2000, 2001 R. Byron Moore
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26
  27 #include "acpi.h"
  28 #include "acparser.h"
  29 #include "amlcode.h"
  30 #include "acdispat.h"
  31 #include "acinterp.h"
  32 #include "acnamesp.h"
  33 #include "acevents.h"
  34
  35
  36 #define _COMPONENT          ACPI_DISPATCHER
  37          MODULE_NAME         ("dswload")
  38
  39
  40 /*******************************************************************************
  41  *
  42  * FUNCTION:    Acpi_ds_load1_begin_op
  43  *
  44  * PARAMETERS:  Walk_state      - Current state of the parse tree walk
  45  *              Op              - Op that has been just been reached in the
  46  *                                walk;  Arguments have not been evaluated yet.
  47  *
  48  * RETURN:      Status
  49  *
  50  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
  51  *
  52  ******************************************************************************/
  53
  54 ACPI_STATUS
  55 acpi_ds_load1_begin_op (
  56         u16                     opcode,
  57         ACPI_PARSE_OBJECT       *op,
  58         ACPI_WALK_STATE         *walk_state,
  59         ACPI_PARSE_OBJECT       **out_op)
  60 {
  61         ACPI_NAMESPACE_NODE     *node;
  62         ACPI_STATUS             status;
  63         OBJECT_TYPE_INTERNAL    data_type;
  64         NATIVE_CHAR             *path;
  65
  66
  67         /* We are only interested in opcodes that have an associated name */
  68
  69         if (!acpi_ps_is_named_op (opcode)) {
  70                 *out_op = op;
  71                 return (AE_OK);
  72         }
  73
  74
  75         /* Check if this object has already been installed in the namespace */
  76
  77         if (op && op->node) {
  78                 *out_op = op;
  79                 return (AE_OK);
  80         }
  81
  82         path = acpi_ps_get_next_namestring (walk_state->parser_state);
  83
  84         /* Map the raw opcode into an internal object type */
  85
  86         data_type = acpi_ds_map_named_opcode_to_data_type (opcode);
  87
  88
  89
  90         /*
  91          * Enter the named type into the internal namespace.  We enter the name
  92          * as we go downward in the parse tree.  Any necessary subobjects that involve
  93          * arguments to the opcode must be created as we go back up the parse tree later.
  94          */
  95         status = acpi_ns_lookup (walk_state->scope_info, path,
  96                          data_type, IMODE_LOAD_PASS1,
  97                          NS_NO_UPSEARCH, walk_state, &(node));
  98
  99         if (ACPI_FAILURE (status)) {
 100                 return (status);
 101         }
 102
 103         if (!op) {
 104                 /* Create a new op */
 105
 106                 op = acpi_ps_alloc_op (opcode);
 107                 if (!op) {
 108                         return (AE_NO_MEMORY);
 109                 }
 110         }
 111
 112         /* Initialize */
 113
 114         ((ACPI_PARSE2_OBJECT *)op)->name = node->name;
 115
 116         /*
 117          * Put the Node in the "op" object that the parser uses, so we
 118          * can get it again quickly when this scope is closed
 119          */
 120         op->node = node;
 121
 122
 123         acpi_ps_append_arg (acpi_ps_get_parent_scope (walk_state->parser_state), op);
 124
 125         *out_op = op;
 126
 127         return (status);
 128 }
 129
 130
 131 /*******************************************************************************
 132  *
 133  * FUNCTION:    Acpi_ds_load1_end_op
 134  *
 135  * PARAMETERS:  Walk_state      - Current state of the parse tree walk
 136  *              Op              - Op that has been just been completed in the
 137  *                                walk;  Arguments have now been evaluated.
 138  *
 139  * RETURN:      Status
 140  *
 141  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 142  *              both control methods and everything else.
 143  *
 144  ******************************************************************************/
 145
 146 ACPI_STATUS
 147 acpi_ds_load1_end_op (
 148         ACPI_WALK_STATE         *walk_state,
 149         ACPI_PARSE_OBJECT       *op)
 150 {
 151         OBJECT_TYPE_INTERNAL    data_type;
 152
 153
 154         /* We are only interested in opcodes that have an associated name */
 155
 156         if (!acpi_ps_is_named_op (op->opcode)) {
 157                 return (AE_OK);
 158         }
 159
 160
 161         /* Get the type to determine if we should pop the scope */
 162
 163         data_type = acpi_ds_map_named_opcode_to_data_type (op->opcode);
 164
 165         if (op->opcode == AML_NAME_OP) {
 166                 /* For Name opcode, check the argument */
 167
 168                 if (op->value.arg) {
 169                         data_type = acpi_ds_map_opcode_to_data_type (
 170                                           (op->value.arg)->opcode, NULL);
 171                         ((ACPI_NAMESPACE_NODE *)op->node)->type =
 172                                           (u8) data_type;
 173                 }
 174         }
 175
 176
 177         /* Pop the scope stack */
 178
 179         if (acpi_ns_opens_scope (data_type)) {
 180
 181                 acpi_ds_scope_stack_pop (walk_state);
 182         }
 183
 184         return (AE_OK);
 185
 186 }
 187
 188
 189 /*******************************************************************************
 190  *
 191  * FUNCTION:    Acpi_ds_load2_begin_op
 192  *
 193  * PARAMETERS:  Walk_state      - Current state of the parse tree walk
 194  *              Op              - Op that has been just been reached in the
 195  *                                walk;  Arguments have not been evaluated yet.
 196  *
 197  * RETURN:      Status
 198  *
 199  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 200  *
 201  ******************************************************************************/
 202
 203 ACPI_STATUS
 204 acpi_ds_load2_begin_op (
 205         u16                     opcode,
 206         ACPI_PARSE_OBJECT       *op,
 207         ACPI_WALK_STATE         *walk_state,
 208         ACPI_PARSE_OBJECT       **out_op)
 209 {
 210         ACPI_NAMESPACE_NODE     *node;
 211         ACPI_STATUS             status;
 212         OBJECT_TYPE_INTERNAL    data_type;
 213         NATIVE_CHAR             *buffer_ptr;
 214         void                    *original = NULL;
 215
 216
 217         /* We only care about Namespace opcodes here */
 218
 219         if (!acpi_ps_is_namespace_op (opcode) &&
 220                 opcode != AML_NAMEPATH_OP) {
 221                 return (AE_OK);
 222         }
 223
 224
 225         /* Temp! same code as in psparse */
 226
 227         if (!acpi_ps_is_named_op (opcode)) {
 228                 return (AE_OK);
 229         }
 230
 231         if (op) {
 232                 /*
 233                  * Get the name we are going to enter or lookup in the namespace
 234                  */
 235                 if (opcode == AML_NAMEPATH_OP) {
 236                         /* For Namepath op, get the path string */
 237
 238                         buffer_ptr = op->value.string;
 239                         if (!buffer_ptr) {
 240                                 /* No name, just exit */
 241
 242                                 return (AE_OK);
 243                         }
 244                 }
 245
 246                 else {
 247                         /* Get name from the op */
 248
 249                         buffer_ptr = (NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)op)->name;
 250                 }
 251         }
 252
 253         else {
 254                 buffer_ptr = acpi_ps_get_next_namestring (walk_state->parser_state);
 255         }
 256
 257
 258         /* Map the raw opcode into an internal object type */
 259
 260         data_type = acpi_ds_map_named_opcode_to_data_type (opcode);
 261
 262
 263         if (opcode == AML_DEF_FIELD_OP      ||
 264                 opcode == AML_BANK_FIELD_OP     ||
 265                 opcode == AML_INDEX_FIELD_OP) {
 266                 node = NULL;
 267                 status = AE_OK;
 268         }
 269
 270         else if (opcode == AML_NAMEPATH_OP) {
 271                 /*
 272                  * The Name_path is an object reference to an existing object. Don't enter the
 273                  * name into the namespace, but look it up for use later
 274                  */
 275                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr,
 276                                  data_type, IMODE_EXECUTE,
 277                                  NS_SEARCH_PARENT, walk_state,
 278                                  &(node));
 279         }
 280
 281         else {
 282                 if (op && op->node) {
 283                         original = op->node;
 284                         node = op->node;
 285
 286                         if (acpi_ns_opens_scope (data_type)) {
 287                                 status = acpi_ds_scope_stack_push (node,
 288                                                    data_type,
 289                                                    walk_state);
 290                                 if (ACPI_FAILURE (status)) {
 291                                         return (status);
 292                                 }
 293
 294                         }
 295                         return (AE_OK);
 296                 }
 297
 298                 /*
 299                  * Enter the named type into the internal namespace.  We enter the name
 300                  * as we go downward in the parse tree.  Any necessary subobjects that involve
 301                  * arguments to the opcode must be created as we go back up the parse tree later.
 302                  */
 303                 status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr,
 304                                  data_type, IMODE_EXECUTE,
 305                                  NS_NO_UPSEARCH, walk_state,
 306                                  &(node));
 307         }
 308
 309         if (ACPI_SUCCESS (status)) {
 310                 if (!op) {
 311                         /* Create a new op */
 312
 313                         op = acpi_ps_alloc_op (opcode);
 314                         if (!op) {
 315                                 return (AE_NO_MEMORY);
 316                         }
 317
 318                         /* Initialize */
 319
 320                         ((ACPI_PARSE2_OBJECT *)op)->name = node->name;
 321                         *out_op = op;
 322                 }
 323
 324
 325                 /*
 326                  * Put the Node in the "op" object that the parser uses, so we
 327                  * can get it again quickly when this scope is closed
 328                  */
 329                 op->node = node;
 330
 331         }
 332
 333
 334         return (status);
 335 }
 336
 337
 338 /*******************************************************************************
 339  *
 340  * FUNCTION:    Acpi_ds_load2_end_op
 341  *
 342  * PARAMETERS:  Walk_state      - Current state of the parse tree walk
 343  *              Op              - Op that has been just been completed in the
 344  *                                walk;  Arguments have now been evaluated.
 345  *
 346  * RETURN:      Status
 347  *
 348  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 349  *              both control methods and everything else.
 350  *
 351  ******************************************************************************/
 352
 353 ACPI_STATUS
 354 acpi_ds_load2_end_op (
 355         ACPI_WALK_STATE         *walk_state,
 356         ACPI_PARSE_OBJECT       *op)
 357 {
 358         ACPI_STATUS             status = AE_OK;
 359         OBJECT_TYPE_INTERNAL    data_type;
 360         ACPI_NAMESPACE_NODE     *node;
 361         ACPI_PARSE_OBJECT       *arg;
 362         ACPI_NAMESPACE_NODE     *new_node;
 363
 364
 365         if (!acpi_ps_is_namespace_object_op (op->opcode)) {
 366                 return (AE_OK);
 367         }
 368
 369         if (op->opcode == AML_SCOPE_OP) {
 370                 if (((ACPI_PARSE2_OBJECT *)op)->name == -1) {
 371                         return (AE_OK);
 372                 }
 373         }
 374
 375
 376         data_type = acpi_ds_map_named_opcode_to_data_type (op->opcode);
 377
 378         /*
 379          * Get the Node/name from the earlier lookup
 380          * (It was saved in the *op structure)
 381          */
 382         node = op->node;
 383
 384         /*
 385          * Put the Node on the object stack (Contains the ACPI Name of
 386          * this object)
 387          */
 388
 389         walk_state->operands[0] = (void *) node;
 390         walk_state->num_operands = 1;
 391
 392         /* Pop the scope stack */
 393
 394         if (acpi_ns_opens_scope (data_type)) {
 395
 396                 acpi_ds_scope_stack_pop (walk_state);
 397         }
 398
 399
 400         /*
 401          * Named operations are as follows:
 402          *
 403          * AML_SCOPE
 404          * AML_DEVICE
 405          * AML_THERMALZONE
 406          * AML_METHOD
 407          * AML_POWERRES
 408          * AML_PROCESSOR
 409          * AML_FIELD
 410          * AML_INDEXFIELD
 411          * AML_BANKFIELD
 412          * AML_NAMEDFIELD
 413          * AML_NAME
 414          * AML_ALIAS
 415          * AML_MUTEX
 416          * AML_EVENT
 417          * AML_OPREGION
 418          * AML_CREATEFIELD
 419          * AML_CREATEBITFIELD
 420          * AML_CREATEBYTEFIELD
 421          * AML_CREATEWORDFIELD
 422          * AML_CREATEDWORDFIELD
 423          * AML_METHODCALL
 424          */
 425
 426
 427         /* Decode the opcode */
 428
 429         arg = op->value.arg;
 430
 431         switch (op->opcode) {
 432
 433         case AML_CREATE_FIELD_OP:
 434         case AML_BIT_FIELD_OP:
 435         case AML_BYTE_FIELD_OP:
 436         case AML_WORD_FIELD_OP:
 437         case AML_DWORD_FIELD_OP:
 438
 439                 /*
 440                  * Create the field object, but the field buffer and index must
 441                  * be evaluated later during the execution phase
 442                  */
 443
 444                 /* Get the Name_string argument */
 445
 446                 if (op->opcode == AML_CREATE_FIELD_OP) {
 447                         arg = acpi_ps_get_arg (op, 3);
 448                 }
 449                 else {
 450                         /* Create Bit/Byte/Word/Dword field */
 451
 452                         arg = acpi_ps_get_arg (op, 2);
 453                 }
 454
 455                 /*
 456                  * Enter the Name_string into the namespace
 457                  */
 458
 459                 status = acpi_ns_lookup (walk_state->scope_info,
 460                                  arg->value.string,
 461                                  INTERNAL_TYPE_DEF_ANY,
 462                                  IMODE_LOAD_PASS1,
 463                                  NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 464                                  walk_state, &(new_node));
 465
 466                 if (ACPI_SUCCESS (status)) {
 467                         /* We could put the returned object (Node) on the object stack for later, but
 468                          * for now, we will put it in the "op" object that the parser uses, so we
 469                          * can get it again at the end of this scope
 470                          */
 471                         op->node = new_node;
 472
 473                         /*
 474                          * If there is no object attached to the node, this node was just created and
 475                          * we need to create the field object.  Otherwise, this was a lookup of an
 476                          * existing node and we don't want to create the field object again.
 477                          */
 478                         if (!new_node->object) {
 479                                 /*
 480                                  * The Field definition is not fully parsed at this time.
 481                                  * (We must save the address of the AML for the buffer and index operands)
 482                                  */
 483                                 status = acpi_aml_exec_create_field (((ACPI_PARSE2_OBJECT *) op)->data,
 484                                                    ((ACPI_PARSE2_OBJECT *) op)->length,
 485                                                    new_node, walk_state);
 486                         }
 487                 }
 488
 489
 490                 break;
 491
 492
 493         case AML_METHODCALL_OP:
 494
 495                 /*
 496                  * Lookup the method name and save the Node
 497                  */
 498
 499                 status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
 500                                  ACPI_TYPE_ANY, IMODE_LOAD_PASS2,
 501                                  NS_SEARCH_PARENT | NS_DONT_OPEN_SCOPE,
 502                                  walk_state, &(new_node));
 503
 504                 if (ACPI_SUCCESS (status)) {
 505
 506 /* has name already been resolved by here ??*/
 507
 508                         /* TBD: [Restructure] Make sure that what we found is indeed a method! */
 509                         /* We didn't search for a method on purpose, to see if the name would resolve! */
 510
 511                         /* We could put the returned object (Node) on the object stack for later, but
 512                          * for now, we will put it in the "op" object that the parser uses, so we
 513                          * can get it again at the end of this scope
 514                          */
 515                         op->node = new_node;
 516                 }
 517
 518
 519                  break;
 520
 521
 522         case AML_PROCESSOR_OP:
 523
 524                 /* Nothing to do other than enter object into namespace */
 525
 526                 status = acpi_aml_exec_create_processor (op, (ACPI_HANDLE) node);
 527                 if (ACPI_FAILURE (status)) {
 528                         goto cleanup;
 529                 }
 530
 531                 break;
 532
 533
 534         case AML_POWER_RES_OP:
 535
 536                 /* Nothing to do other than enter object into namespace */
 537
 538                 status = acpi_aml_exec_create_power_resource (op, (ACPI_HANDLE) node);
 539                 if (ACPI_FAILURE (status)) {
 540                         goto cleanup;
 541                 }
 542
 543                 break;
 544
 545
 546         case AML_THERMAL_ZONE_OP:
 547
 548                 /* Nothing to do other than enter object into namespace */
 549
 550                 break;
 551
 552
 553         case AML_DEF_FIELD_OP:
 554
 555                 arg = op->value.arg;
 556
 557                 status = acpi_ds_create_field (op, arg->node, walk_state);
 558                 break;
 559
 560
 561         case AML_INDEX_FIELD_OP:
 562
 563                 arg = op->value.arg;
 564
 565                 status = acpi_ds_create_index_field (op, (ACPI_HANDLE) arg->node,
 566                                    walk_state);
 567                 break;
 568
 569
 570         case AML_BANK_FIELD_OP:
 571
 572                 arg = op->value.arg;
 573                 status = acpi_ds_create_bank_field (op, arg->node, walk_state);
 574                 break;
 575
 576
 577         /*
 578          * Method_op Pkg_length Names_string Method_flags Term_list
 579          */
 580         case AML_METHOD_OP:
 581
 582                 if (!node->object) {
 583                         status = acpi_aml_exec_create_method (((ACPI_PARSE2_OBJECT *) op)->data,
 584                                            ((ACPI_PARSE2_OBJECT *) op)->length,
 585                                            arg->value.integer, (ACPI_HANDLE) node);
 586                 }
 587
 588                 break;
 589
 590
 591         case AML_MUTEX_OP:
 592
 593                 status = acpi_ds_create_operands (walk_state, arg);
 594                 if (ACPI_FAILURE (status)) {
 595                         goto cleanup;
 596                 }
 597
 598                 status = acpi_aml_exec_create_mutex (walk_state);
 599                 break;
 600
 601
 602         case AML_EVENT_OP:
 603
 604                 status = acpi_ds_create_operands (walk_state, arg);
 605                 if (ACPI_FAILURE (status)) {
 606                         goto cleanup;
 607                 }
 608
 609                 status = acpi_aml_exec_create_event (walk_state);
 610                 break;
 611
 612
 613         case AML_REGION_OP:
 614
 615                 if (node->object) {
 616                         break;
 617                 }
 618
 619
 620                 /*
 621                  * The Op_region is not fully parsed at this time. Only valid argument is the Space_id.
 622                  * (We must save the address of the AML of the address and length operands)
 623                  */
 624
 625                 status = acpi_aml_exec_create_region (((ACPI_PARSE2_OBJECT *) op)->data,
 626                                    ((ACPI_PARSE2_OBJECT *) op)->length,
 627                                    (ACPI_ADDRESS_SPACE_TYPE) arg->value.integer,
 628                                    walk_state);
 629
 630                 break;
 631
 632
 633         /* Namespace Modifier Opcodes */
 634
 635         case AML_ALIAS_OP:
 636
 637                 status = acpi_ds_create_operands (walk_state, arg);
 638                 if (ACPI_FAILURE (status)) {
 639                         goto cleanup;
 640                 }
 641
 642                 status = acpi_aml_exec_create_alias (walk_state);
 643                 break;
 644
 645
 646         case AML_NAME_OP:
 647
 648                 /*
 649                  * Because of the execution pass through the non-control-method
 650                  * parts of the table, we can arrive here twice.  Only init
 651                  * the named object node the first time through
 652                  */
 653
 654                 if (!node->object) {
 655                         status = acpi_ds_create_node (walk_state, node, op);
 656                 }
 657
 658                 break;
 659
 660
 661         case AML_NAMEPATH_OP:
 662
 663                 break;
 664
 665
 666         default:
 667                 break;
 668         }
 669
 670
 671 cleanup:
 672
 673         /* Remove the Node pushed at the very beginning */
 674
 675         acpi_ds_obj_stack_pop (1, walk_state);
 676         return (status);
 677 }
 678
 679