drivers/acpi/executer/excreate.c

   1 /******************************************************************************
   2  *
   3  * Module Name: excreate - Named object creation
   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/acinterp.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/acnamesp.h>
  49 #include <acpi/acevents.h>
  50 #include <acpi/actables.h>
  51
  52
  53 #define _COMPONENT          ACPI_EXECUTER
  54          ACPI_MODULE_NAME    ("excreate")
  55
  56
  57 #ifndef ACPI_NO_METHOD_EXECUTION
  58 /*****************************************************************************
  59  *
  60  * FUNCTION:    acpi_ex_create_alias
  61  *
  62  * PARAMETERS:  walk_state           - Current state, contains operands
  63  *
  64  * RETURN:      Status
  65  *
  66  * DESCRIPTION: Create a new named alias
  67  *
  68  ****************************************************************************/
  69
  70 acpi_status
  71 acpi_ex_create_alias (
  72         struct acpi_walk_state          *walk_state)
  73 {
  74         struct acpi_namespace_node      *target_node;
  75         struct acpi_namespace_node      *alias_node;
  76         acpi_status                     status = AE_OK;
  77
  78
  79         ACPI_FUNCTION_TRACE ("ex_create_alias");
  80
  81
  82         /* Get the source/alias operands (both namespace nodes) */
  83
  84         alias_node = (struct acpi_namespace_node *) walk_state->operands[0];
  85         target_node = (struct acpi_namespace_node *) walk_state->operands[1];
  86
  87         if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
  88                 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
  89                 /*
  90                  * Dereference an existing alias so that we don't create a chain
  91                  * of aliases.  With this code, we guarantee that an alias is
  92                  * always exactly one level of indirection away from the
  93                  * actual aliased name.
  94                  */
  95                 target_node = ACPI_CAST_PTR (struct acpi_namespace_node, target_node->object);
  96         }
  97
  98         /*
  99          * For objects that can never change (i.e., the NS node will
 100          * permanently point to the same object), we can simply attach
 101          * the object to the new NS node.  For other objects (such as
 102          * Integers, buffers, etc.), we have to point the Alias node
 103          * to the original Node.
 104          */
 105         switch (target_node->type) {
 106         case ACPI_TYPE_INTEGER:
 107         case ACPI_TYPE_STRING:
 108         case ACPI_TYPE_BUFFER:
 109         case ACPI_TYPE_PACKAGE:
 110         case ACPI_TYPE_BUFFER_FIELD:
 111
 112                 /*
 113                  * The new alias has the type ALIAS and points to the original
 114                  * NS node, not the object itself.  This is because for these
 115                  * types, the object can change dynamically via a Store.
 116                  */
 117                 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
 118                 alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
 119                 break;
 120
 121         case ACPI_TYPE_METHOD:
 122
 123                 /*
 124                  * The new alias has the type ALIAS and points to the original
 125                  * NS node, not the object itself.  This is because for these
 126                  * types, the object can change dynamically via a Store.
 127                  */
 128                 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
 129                 alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
 130                 break;
 131
 132         default:
 133
 134                 /* Attach the original source object to the new Alias Node */
 135
 136                 /*
 137                  * The new alias assumes the type of the target, and it points
 138                  * to the same object.  The reference count of the object has an
 139                  * additional reference to prevent deletion out from under either the
 140                  * target node or the alias Node
 141                  */
 142                 status = acpi_ns_attach_object (alias_node,
 143                                  acpi_ns_get_attached_object (target_node),
 144                                  target_node->type);
 145                 break;
 146         }
 147
 148         /* Since both operands are Nodes, we don't need to delete them */
 149
 150         return_ACPI_STATUS (status);
 151 }
 152
 153
 154 /*****************************************************************************
 155  *
 156  * FUNCTION:    acpi_ex_create_event
 157  *
 158  * PARAMETERS:  walk_state          - Current state
 159  *
 160  * RETURN:      Status
 161  *
 162  * DESCRIPTION: Create a new event object
 163  *
 164  ****************************************************************************/
 165
 166 acpi_status
 167 acpi_ex_create_event (
 168         struct acpi_walk_state          *walk_state)
 169 {
 170         acpi_status                     status;
 171         union acpi_operand_object       *obj_desc;
 172
 173
 174         ACPI_FUNCTION_TRACE ("ex_create_event");
 175
 176
 177         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_EVENT);
 178         if (!obj_desc) {
 179                 status = AE_NO_MEMORY;
 180                 goto cleanup;
 181         }
 182
 183         /*
 184          * Create the actual OS semaphore, with zero initial units -- meaning
 185          * that the event is created in an unsignalled state
 186          */
 187         status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 0,
 188                            &obj_desc->event.semaphore);
 189         if (ACPI_FAILURE (status)) {
 190                 goto cleanup;
 191         }
 192
 193         /* Attach object to the Node */
 194
 195         status = acpi_ns_attach_object ((struct acpi_namespace_node *) walk_state->operands[0],
 196                            obj_desc, ACPI_TYPE_EVENT);
 197
 198 cleanup:
 199         /*
 200          * Remove local reference to the object (on error, will cause deletion
 201          * of both object and semaphore if present.)
 202          */
 203         acpi_ut_remove_reference (obj_desc);
 204         return_ACPI_STATUS (status);
 205 }
 206
 207
 208 /*****************************************************************************
 209  *
 210  * FUNCTION:    acpi_ex_create_mutex
 211  *
 212  * PARAMETERS:  walk_state          - Current state
 213  *
 214  * RETURN:      Status
 215  *
 216  * DESCRIPTION: Create a new mutex object
 217  *
 218  *              Mutex (Name[0], sync_level[1])
 219  *
 220  ****************************************************************************/
 221
 222 acpi_status
 223 acpi_ex_create_mutex (
 224         struct acpi_walk_state          *walk_state)
 225 {
 226         acpi_status                     status = AE_OK;
 227         union acpi_operand_object       *obj_desc;
 228
 229
 230         ACPI_FUNCTION_TRACE_PTR ("ex_create_mutex", ACPI_WALK_OPERANDS);
 231
 232
 233         /* Create the new mutex object */
 234
 235         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_MUTEX);
 236         if (!obj_desc) {
 237                 status = AE_NO_MEMORY;
 238                 goto cleanup;
 239         }
 240
 241         /*
 242          * Create the actual OS semaphore.
 243          * One unit max to make it a mutex, with one initial unit to allow
 244          * the mutex to be acquired.
 245          */
 246         status = acpi_os_create_semaphore (1, 1, &obj_desc->mutex.semaphore);
 247         if (ACPI_FAILURE (status)) {
 248                 goto cleanup;
 249         }
 250
 251         /* Init object and attach to NS node */
 252
 253         obj_desc->mutex.sync_level = (u8) walk_state->operands[1]->integer.value;
 254         obj_desc->mutex.node = (struct acpi_namespace_node *) walk_state->operands[0];
 255
 256         status = acpi_ns_attach_object (obj_desc->mutex.node,
 257                          obj_desc, ACPI_TYPE_MUTEX);
 258
 259
 260 cleanup:
 261         /*
 262          * Remove local reference to the object (on error, will cause deletion
 263          * of both object and semaphore if present.)
 264          */
 265         acpi_ut_remove_reference (obj_desc);
 266         return_ACPI_STATUS (status);
 267 }
 268
 269
 270 /*****************************************************************************
 271  *
 272  * FUNCTION:    acpi_ex_create_region
 273  *
 274  * PARAMETERS:  aml_start           - Pointer to the region declaration AML
 275  *              aml_length          - Max length of the declaration AML
 276  *              Operands            - List of operands for the opcode
 277  *              walk_state          - Current state
 278  *
 279  * RETURN:      Status
 280  *
 281  * DESCRIPTION: Create a new operation region object
 282  *
 283  ****************************************************************************/
 284
 285 acpi_status
 286 acpi_ex_create_region (
 287         u8                              *aml_start,
 288         u32                             aml_length,
 289         u8                              region_space,
 290         struct acpi_walk_state          *walk_state)
 291 {
 292         acpi_status                     status;
 293         union acpi_operand_object       *obj_desc;
 294         struct acpi_namespace_node      *node;
 295         union acpi_operand_object       *region_obj2;
 296
 297
 298         ACPI_FUNCTION_TRACE ("ex_create_region");
 299
 300
 301         /* Get the Namespace Node */
 302
 303         node = walk_state->op->common.node;
 304
 305         /*
 306          * If the region object is already attached to this node,
 307          * just return
 308          */
 309         if (acpi_ns_get_attached_object (node)) {
 310                 return_ACPI_STATUS (AE_OK);
 311         }
 312
 313         /*
 314          * Space ID must be one of the predefined IDs, or in the user-defined
 315          * range
 316          */
 317         if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
 318                 (region_space < ACPI_USER_REGION_BEGIN)) {
 319                 ACPI_REPORT_ERROR (("Invalid address_space type %X\n", region_space));
 320                 return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
 321         }
 322
 323         ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
 324                           acpi_ut_get_region_name (region_space), region_space));
 325
 326         /* Create the region descriptor */
 327
 328         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
 329         if (!obj_desc) {
 330                 status = AE_NO_MEMORY;
 331                 goto cleanup;
 332         }
 333
 334         /*
 335          * Remember location in AML stream of address & length
 336          * operands since they need to be evaluated at run time.
 337          */
 338         region_obj2                 = obj_desc->common.next_object;
 339         region_obj2->extra.aml_start = aml_start;
 340         region_obj2->extra.aml_length = aml_length;
 341
 342         /* Init the region from the operands */
 343
 344         obj_desc->region.space_id = region_space;
 345         obj_desc->region.address = 0;
 346         obj_desc->region.length = 0;
 347         obj_desc->region.node   = node;
 348
 349         /* Install the new region object in the parent Node */
 350
 351         status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
 352
 353
 354 cleanup:
 355
 356         /* Remove local reference to the object */
 357
 358         acpi_ut_remove_reference (obj_desc);
 359         return_ACPI_STATUS (status);
 360 }
 361
 362
 363 /*****************************************************************************
 364  *
 365  * FUNCTION:    acpi_ex_create_table_region
 366  *
 367  * PARAMETERS:  walk_state          - Current state
 368  *
 369  * RETURN:      Status
 370  *
 371  * DESCRIPTION: Create a new data_table_region object
 372  *
 373  ****************************************************************************/
 374
 375 acpi_status
 376 acpi_ex_create_table_region (
 377         struct acpi_walk_state          *walk_state)
 378 {
 379         acpi_status                     status;
 380         union acpi_operand_object       **operand = &walk_state->operands[0];
 381         union acpi_operand_object       *obj_desc;
 382         struct acpi_namespace_node      *node;
 383         struct acpi_table_header        *table;
 384         union acpi_operand_object       *region_obj2;
 385
 386
 387         ACPI_FUNCTION_TRACE ("ex_create_table_region");
 388
 389
 390         /* Get the Node from the object stack  */
 391
 392         node = walk_state->op->common.node;
 393
 394         /*
 395          * If the region object is already attached to this node,
 396          * just return
 397          */
 398         if (acpi_ns_get_attached_object (node)) {
 399                 return_ACPI_STATUS (AE_OK);
 400         }
 401
 402         /* Find the ACPI table */
 403
 404         status = acpi_tb_find_table (operand[1]->string.pointer,
 405                            operand[2]->string.pointer,
 406                            operand[3]->string.pointer, &table);
 407         if (ACPI_FAILURE (status)) {
 408                 return_ACPI_STATUS (status);
 409         }
 410
 411         /* Create the region descriptor */
 412
 413         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
 414         if (!obj_desc) {
 415                 return_ACPI_STATUS (AE_NO_MEMORY);
 416         }
 417
 418         region_obj2                     = obj_desc->common.next_object;
 419         region_obj2->extra.region_context = NULL;
 420
 421         /* Init the region from the operands */
 422
 423         obj_desc->region.space_id = REGION_DATA_TABLE;
 424         obj_desc->region.address = (acpi_physical_address) ACPI_TO_INTEGER (table);
 425         obj_desc->region.length = table->length;
 426         obj_desc->region.node   = node;
 427         obj_desc->region.flags  = AOPOBJ_DATA_VALID;
 428
 429         /* Install the new region object in the parent Node */
 430
 431         status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
 432         if (ACPI_FAILURE (status)) {
 433                 goto cleanup;
 434         }
 435
 436         status = acpi_ev_initialize_region (obj_desc, FALSE);
 437         if (ACPI_FAILURE (status)) {
 438                 if (status == AE_NOT_EXIST) {
 439                         status = AE_OK;
 440                 }
 441                 else {
 442                         goto cleanup;
 443                 }
 444         }
 445
 446         obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;
 447
 448
 449 cleanup:
 450
 451         /* Remove local reference to the object */
 452
 453         acpi_ut_remove_reference (obj_desc);
 454         return_ACPI_STATUS (status);
 455 }
 456
 457
 458 /*****************************************************************************
 459  *
 460  * FUNCTION:    acpi_ex_create_processor
 461  *
 462  * PARAMETERS:  walk_state          - Current state
 463  *
 464  * RETURN:      Status
 465  *
 466  * DESCRIPTION: Create a new processor object and populate the fields
 467  *
 468  *              Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
 469  *
 470  ****************************************************************************/
 471
 472 acpi_status
 473 acpi_ex_create_processor (
 474         struct acpi_walk_state          *walk_state)
 475 {
 476         union acpi_operand_object       **operand = &walk_state->operands[0];
 477         union acpi_operand_object       *obj_desc;
 478         acpi_status                     status;
 479
 480
 481         ACPI_FUNCTION_TRACE_PTR ("ex_create_processor", walk_state);
 482
 483
 484         /* Create the processor object */
 485
 486         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PROCESSOR);
 487         if (!obj_desc) {
 488                 return_ACPI_STATUS (AE_NO_MEMORY);
 489         }
 490
 491         /*
 492          * Initialize the processor object from the operands
 493          */
 494         obj_desc->processor.proc_id = (u8)          operand[1]->integer.value;
 495         obj_desc->processor.address = (acpi_io_address) operand[2]->integer.value;
 496         obj_desc->processor.length = (u8)           operand[3]->integer.value;
 497
 498         /* Install the processor object in the parent Node */
 499
 500         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 501                           obj_desc, ACPI_TYPE_PROCESSOR);
 502
 503         /* Remove local reference to the object */
 504
 505         acpi_ut_remove_reference (obj_desc);
 506         return_ACPI_STATUS (status);
 507 }
 508
 509
 510 /*****************************************************************************
 511  *
 512  * FUNCTION:    acpi_ex_create_power_resource
 513  *
 514  * PARAMETERS:  walk_state          - Current state
 515  *
 516  * RETURN:      Status
 517  *
 518  * DESCRIPTION: Create a new power_resource object and populate the fields
 519  *
 520  *              power_resource (Name[0], system_level[1], resource_order[2])
 521  *
 522  ****************************************************************************/
 523
 524 acpi_status
 525 acpi_ex_create_power_resource (
 526         struct acpi_walk_state          *walk_state)
 527 {
 528         union acpi_operand_object       **operand = &walk_state->operands[0];
 529         acpi_status                     status;
 530         union acpi_operand_object       *obj_desc;
 531
 532
 533         ACPI_FUNCTION_TRACE_PTR ("ex_create_power_resource", walk_state);
 534
 535
 536         /* Create the power resource object */
 537
 538         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_POWER);
 539         if (!obj_desc) {
 540                 return_ACPI_STATUS (AE_NO_MEMORY);
 541         }
 542
 543         /* Initialize the power object from the operands */
 544
 545         obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
 546         obj_desc->power_resource.resource_order = (u16) operand[2]->integer.value;
 547
 548         /* Install the  power resource object in the parent Node */
 549
 550         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 551                           obj_desc, ACPI_TYPE_POWER);
 552
 553         /* Remove local reference to the object */
 554
 555         acpi_ut_remove_reference (obj_desc);
 556         return_ACPI_STATUS (status);
 557 }
 558
 559 #endif
 560
 561 /*****************************************************************************
 562  *
 563  * FUNCTION:    acpi_ex_create_method
 564  *
 565  * PARAMETERS:  aml_start       - First byte of the method's AML
 566  *              aml_length      - AML byte count for this method
 567  *              walk_state      - Current state
 568  *
 569  * RETURN:      Status
 570  *
 571  * DESCRIPTION: Create a new method object
 572  *
 573  ****************************************************************************/
 574
 575 acpi_status
 576 acpi_ex_create_method (
 577         u8                              *aml_start,
 578         u32                             aml_length,
 579         struct acpi_walk_state          *walk_state)
 580 {
 581         union acpi_operand_object       **operand = &walk_state->operands[0];
 582         union acpi_operand_object       *obj_desc;
 583         acpi_status                     status;
 584         u8                              method_flags;
 585
 586
 587         ACPI_FUNCTION_TRACE_PTR ("ex_create_method", walk_state);
 588
 589
 590         /* Create a new method object */
 591
 592         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_METHOD);
 593         if (!obj_desc) {
 594            return_ACPI_STATUS (AE_NO_MEMORY);
 595         }
 596
 597         /* Save the method's AML pointer and length  */
 598
 599         obj_desc->method.aml_start = aml_start;
 600         obj_desc->method.aml_length = aml_length;
 601
 602         /*
 603          * Disassemble the method flags.  Split off the Arg Count
 604          * for efficiency
 605          */
 606         method_flags = (u8) operand[1]->integer.value;
 607
 608         obj_desc->method.method_flags = (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
 609         obj_desc->method.param_count = (u8) (method_flags & AML_METHOD_ARG_COUNT);
 610
 611         /*
 612          * Get the concurrency count.  If required, a semaphore will be
 613          * created for this method when it is parsed.
 614          */
 615         if (acpi_gbl_all_methods_serialized) {
 616                 obj_desc->method.concurrency = 1;
 617                 obj_desc->method.method_flags |= AML_METHOD_SERIALIZED;
 618         }
 619         else if (method_flags & AML_METHOD_SERIALIZED) {
 620                 /*
 621                  * ACPI 1.0: Concurrency = 1
 622                  * ACPI 2.0: Concurrency = (sync_level (in method declaration) + 1)
 623                  */
 624                 obj_desc->method.concurrency = (u8)
 625                                   (((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1);
 626         }
 627         else {
 628                 obj_desc->method.concurrency = ACPI_INFINITE_CONCURRENCY;
 629         }
 630
 631         /* Attach the new object to the method Node */
 632
 633         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 634                           obj_desc, ACPI_TYPE_METHOD);
 635
 636         /* Remove local reference to the object */
 637
 638         acpi_ut_remove_reference (obj_desc);
 639
 640         /* Remove a reference to the operand */
 641
 642         acpi_ut_remove_reference (operand[1]);
 643         return_ACPI_STATUS (status);
 644 }
 645
 646