drivers/acpi/executer/excreate.c

   1 /******************************************************************************
   2  *
   3  * Module Name: excreate - Named object creation
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, 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 #include <acpi/acpi.h>
  45 #include <acpi/acinterp.h>
  46 #include <acpi/amlcode.h>
  47 #include <acpi/acnamesp.h>
  48 #include <acpi/acevents.h>
  49 #include <acpi/actables.h>
  50
  51 #define _COMPONENT          ACPI_EXECUTER
  52 ACPI_MODULE_NAME("excreate")
  53
  54 #ifndef ACPI_NO_METHOD_EXECUTION
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    acpi_ex_create_alias
  58  *
  59  * PARAMETERS:  walk_state           - Current state, contains operands
  60  *
  61  * RETURN:      Status
  62  *
  63  * DESCRIPTION: Create a new named alias
  64  *
  65  ******************************************************************************/
  66 acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
  67 {
  68         struct acpi_namespace_node *target_node;
  69         struct acpi_namespace_node *alias_node;
  70         acpi_status status = AE_OK;
  71
  72         ACPI_FUNCTION_TRACE(ex_create_alias);
  73
  74         /* Get the source/alias operands (both namespace nodes) */
  75
  76         alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
  77         target_node = (struct acpi_namespace_node *)walk_state->operands[1];
  78
  79         if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
  80             (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
  81                 /*
  82                  * Dereference an existing alias so that we don't create a chain
  83                  * of aliases.  With this code, we guarantee that an alias is
  84                  * always exactly one level of indirection away from the
  85                  * actual aliased name.
  86                  */
  87                 target_node =
  88                     ACPI_CAST_PTR(struct acpi_namespace_node,
  89                                   target_node->object);
  90         }
  91
  92         /*
  93          * For objects that can never change (i.e., the NS node will
  94          * permanently point to the same object), we can simply attach
  95          * the object to the new NS node.  For other objects (such as
  96          * Integers, buffers, etc.), we have to point the Alias node
  97          * to the original Node.
  98          */
  99         switch (target_node->type) {
 100         case ACPI_TYPE_INTEGER:
 101         case ACPI_TYPE_STRING:
 102         case ACPI_TYPE_BUFFER:
 103         case ACPI_TYPE_PACKAGE:
 104         case ACPI_TYPE_BUFFER_FIELD:
 105
 106                 /*
 107                  * The new alias has the type ALIAS and points to the original
 108                  * NS node, not the object itself.  This is because for these
 109                  * types, the object can change dynamically via a Store.
 110                  */
 111                 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
 112                 alias_node->object =
 113                     ACPI_CAST_PTR(union acpi_operand_object, target_node);
 114                 break;
 115
 116         case ACPI_TYPE_METHOD:
 117
 118                 /*
 119                  * The new alias has the type ALIAS and points to the original
 120                  * NS node, not the object itself.  This is because for these
 121                  * types, the object can change dynamically via a Store.
 122                  */
 123                 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
 124                 alias_node->object =
 125                     ACPI_CAST_PTR(union acpi_operand_object, target_node);
 126                 break;
 127
 128         default:
 129
 130                 /* Attach the original source object to the new Alias Node */
 131
 132                 /*
 133                  * The new alias assumes the type of the target, and it points
 134                  * to the same object.  The reference count of the object has an
 135                  * additional reference to prevent deletion out from under either the
 136                  * target node or the alias Node
 137                  */
 138                 status = acpi_ns_attach_object(alias_node,
 139                                                acpi_ns_get_attached_object
 140                                                (target_node),
 141                                                target_node->type);
 142                 break;
 143         }
 144
 145         /* Since both operands are Nodes, we don't need to delete them */
 146
 147         return_ACPI_STATUS(status);
 148 }
 149
 150 /*******************************************************************************
 151  *
 152  * FUNCTION:    acpi_ex_create_event
 153  *
 154  * PARAMETERS:  walk_state          - Current state
 155  *
 156  * RETURN:      Status
 157  *
 158  * DESCRIPTION: Create a new event object
 159  *
 160  ******************************************************************************/
 161
 162 acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
 163 {
 164         acpi_status status;
 165         union acpi_operand_object *obj_desc;
 166
 167         ACPI_FUNCTION_TRACE(ex_create_event);
 168
 169         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
 170         if (!obj_desc) {
 171                 status = AE_NO_MEMORY;
 172                 goto cleanup;
 173         }
 174
 175         /*
 176          * Create the actual OS semaphore, with zero initial units -- meaning
 177          * that the event is created in an unsignalled state
 178          */
 179         status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
 180                                           &obj_desc->event.semaphore);
 181         if (ACPI_FAILURE(status)) {
 182                 goto cleanup;
 183         }
 184
 185         /* Attach object to the Node */
 186
 187         status =
 188             acpi_ns_attach_object((struct acpi_namespace_node *)walk_state->
 189                                   operands[0], obj_desc, ACPI_TYPE_EVENT);
 190
 191       cleanup:
 192         /*
 193          * Remove local reference to the object (on error, will cause deletion
 194          * of both object and semaphore if present.)
 195          */
 196         acpi_ut_remove_reference(obj_desc);
 197         return_ACPI_STATUS(status);
 198 }
 199
 200 /*******************************************************************************
 201  *
 202  * FUNCTION:    acpi_ex_create_mutex
 203  *
 204  * PARAMETERS:  walk_state          - Current state
 205  *
 206  * RETURN:      Status
 207  *
 208  * DESCRIPTION: Create a new mutex object
 209  *
 210  *              Mutex (Name[0], sync_level[1])
 211  *
 212  ******************************************************************************/
 213
 214 acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
 215 {
 216         acpi_status status = AE_OK;
 217         union acpi_operand_object *obj_desc;
 218
 219         ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
 220
 221         /* Create the new mutex object */
 222
 223         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
 224         if (!obj_desc) {
 225                 status = AE_NO_MEMORY;
 226                 goto cleanup;
 227         }
 228
 229         /*
 230          * Create the actual OS semaphore.
 231          * One unit max to make it a mutex, with one initial unit to allow
 232          * the mutex to be acquired.
 233          */
 234         status = acpi_os_create_semaphore(1, 1, &obj_desc->mutex.semaphore);
 235         if (ACPI_FAILURE(status)) {
 236                 goto cleanup;
 237         }
 238
 239         /* Init object and attach to NS node */
 240
 241         obj_desc->mutex.sync_level =
 242             (u8) walk_state->operands[1]->integer.value;
 243         obj_desc->mutex.node =
 244             (struct acpi_namespace_node *)walk_state->operands[0];
 245
 246         status =
 247             acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
 248                                   ACPI_TYPE_MUTEX);
 249
 250       cleanup:
 251         /*
 252          * Remove local reference to the object (on error, will cause deletion
 253          * of both object and semaphore if present.)
 254          */
 255         acpi_ut_remove_reference(obj_desc);
 256         return_ACPI_STATUS(status);
 257 }
 258
 259 /*******************************************************************************
 260  *
 261  * FUNCTION:    acpi_ex_create_region
 262  *
 263  * PARAMETERS:  aml_start           - Pointer to the region declaration AML
 264  *              aml_length          - Max length of the declaration AML
 265  *              region_space        - space_iD for the region
 266  *              walk_state          - Current state
 267  *
 268  * RETURN:      Status
 269  *
 270  * DESCRIPTION: Create a new operation region object
 271  *
 272  ******************************************************************************/
 273
 274 acpi_status
 275 acpi_ex_create_region(u8 * aml_start,
 276                       u32 aml_length,
 277                       u8 region_space, struct acpi_walk_state *walk_state)
 278 {
 279         acpi_status status;
 280         union acpi_operand_object *obj_desc;
 281         struct acpi_namespace_node *node;
 282         union acpi_operand_object *region_obj2;
 283
 284         ACPI_FUNCTION_TRACE(ex_create_region);
 285
 286         /* Get the Namespace Node */
 287
 288         node = walk_state->op->common.node;
 289
 290         /*
 291          * If the region object is already attached to this node,
 292          * just return
 293          */
 294         if (acpi_ns_get_attached_object(node)) {
 295                 return_ACPI_STATUS(AE_OK);
 296         }
 297
 298         /*
 299          * Space ID must be one of the predefined IDs, or in the user-defined
 300          * range
 301          */
 302         if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
 303             (region_space < ACPI_USER_REGION_BEGIN)) {
 304                 ACPI_ERROR((AE_INFO, "Invalid AddressSpace type %X",
 305                             region_space));
 306                 return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
 307         }
 308
 309         ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
 310                           acpi_ut_get_region_name(region_space), region_space));
 311
 312         /* Create the region descriptor */
 313
 314         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
 315         if (!obj_desc) {
 316                 status = AE_NO_MEMORY;
 317                 goto cleanup;
 318         }
 319
 320         /*
 321          * Remember location in AML stream of address & length
 322          * operands since they need to be evaluated at run time.
 323          */
 324         region_obj2 = obj_desc->common.next_object;
 325         region_obj2->extra.aml_start = aml_start;
 326         region_obj2->extra.aml_length = aml_length;
 327
 328         /* Init the region from the operands */
 329
 330         obj_desc->region.space_id = region_space;
 331         obj_desc->region.address = 0;
 332         obj_desc->region.length = 0;
 333         obj_desc->region.node = node;
 334
 335         /* Install the new region object in the parent Node */
 336
 337         status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
 338
 339       cleanup:
 340
 341         /* Remove local reference to the object */
 342
 343         acpi_ut_remove_reference(obj_desc);
 344         return_ACPI_STATUS(status);
 345 }
 346
 347 /*******************************************************************************
 348  *
 349  * FUNCTION:    acpi_ex_create_table_region
 350  *
 351  * PARAMETERS:  walk_state          - Current state
 352  *
 353  * RETURN:      Status
 354  *
 355  * DESCRIPTION: Create a new data_table_region object
 356  *
 357  ******************************************************************************/
 358
 359 acpi_status acpi_ex_create_table_region(struct acpi_walk_state *walk_state)
 360 {
 361         acpi_status status;
 362         union acpi_operand_object **operand = &walk_state->operands[0];
 363         union acpi_operand_object *obj_desc;
 364         struct acpi_namespace_node *node;
 365         struct acpi_table_header *table;
 366         union acpi_operand_object *region_obj2;
 367
 368         ACPI_FUNCTION_TRACE(ex_create_table_region);
 369
 370         /* Get the Node from the object stack  */
 371
 372         node = walk_state->op->common.node;
 373
 374         /*
 375          * If the region object is already attached to this node,
 376          * just return
 377          */
 378         if (acpi_ns_get_attached_object(node)) {
 379                 return_ACPI_STATUS(AE_OK);
 380         }
 381
 382         /* Find the ACPI table */
 383
 384         status = acpi_tb_find_table(operand[1]->string.pointer,
 385                                     operand[2]->string.pointer,
 386                                     operand[3]->string.pointer, &table);
 387         if (ACPI_FAILURE(status)) {
 388                 return_ACPI_STATUS(status);
 389         }
 390
 391         /* Create the region descriptor */
 392
 393         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
 394         if (!obj_desc) {
 395                 return_ACPI_STATUS(AE_NO_MEMORY);
 396         }
 397
 398         region_obj2 = obj_desc->common.next_object;
 399         region_obj2->extra.region_context = NULL;
 400
 401         /* Init the region from the operands */
 402
 403         obj_desc->region.space_id = REGION_DATA_TABLE;
 404         obj_desc->region.address =
 405             (acpi_physical_address) ACPI_TO_INTEGER(table);
 406         obj_desc->region.length = table->length;
 407         obj_desc->region.node = node;
 408         obj_desc->region.flags = AOPOBJ_DATA_VALID;
 409
 410         /* Install the new region object in the parent Node */
 411
 412         status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
 413         if (ACPI_FAILURE(status)) {
 414                 goto cleanup;
 415         }
 416
 417         status = acpi_ev_initialize_region(obj_desc, FALSE);
 418         if (ACPI_FAILURE(status)) {
 419                 if (status == AE_NOT_EXIST) {
 420                         status = AE_OK;
 421                 } else {
 422                         goto cleanup;
 423                 }
 424         }
 425
 426         obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;
 427
 428       cleanup:
 429
 430         /* Remove local reference to the object */
 431
 432         acpi_ut_remove_reference(obj_desc);
 433         return_ACPI_STATUS(status);
 434 }
 435
 436 /*******************************************************************************
 437  *
 438  * FUNCTION:    acpi_ex_create_processor
 439  *
 440  * PARAMETERS:  walk_state          - Current state
 441  *
 442  * RETURN:      Status
 443  *
 444  * DESCRIPTION: Create a new processor object and populate the fields
 445  *
 446  *              Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
 447  *
 448  ******************************************************************************/
 449
 450 acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
 451 {
 452         union acpi_operand_object **operand = &walk_state->operands[0];
 453         union acpi_operand_object *obj_desc;
 454         acpi_status status;
 455
 456         ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
 457
 458         /* Create the processor object */
 459
 460         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
 461         if (!obj_desc) {
 462                 return_ACPI_STATUS(AE_NO_MEMORY);
 463         }
 464
 465         /* Initialize the processor object from the operands */
 466
 467         obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
 468         obj_desc->processor.length = (u8) operand[3]->integer.value;
 469         obj_desc->processor.address =
 470             (acpi_io_address) operand[2]->integer.value;
 471
 472         /* Install the processor object in the parent Node */
 473
 474         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 475                                        obj_desc, ACPI_TYPE_PROCESSOR);
 476
 477         /* Remove local reference to the object */
 478
 479         acpi_ut_remove_reference(obj_desc);
 480         return_ACPI_STATUS(status);
 481 }
 482
 483 /*******************************************************************************
 484  *
 485  * FUNCTION:    acpi_ex_create_power_resource
 486  *
 487  * PARAMETERS:  walk_state          - Current state
 488  *
 489  * RETURN:      Status
 490  *
 491  * DESCRIPTION: Create a new power_resource object and populate the fields
 492  *
 493  *              power_resource (Name[0], system_level[1], resource_order[2])
 494  *
 495  ******************************************************************************/
 496
 497 acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
 498 {
 499         union acpi_operand_object **operand = &walk_state->operands[0];
 500         acpi_status status;
 501         union acpi_operand_object *obj_desc;
 502
 503         ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
 504
 505         /* Create the power resource object */
 506
 507         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
 508         if (!obj_desc) {
 509                 return_ACPI_STATUS(AE_NO_MEMORY);
 510         }
 511
 512         /* Initialize the power object from the operands */
 513
 514         obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
 515         obj_desc->power_resource.resource_order =
 516             (u16) operand[2]->integer.value;
 517
 518         /* Install the  power resource object in the parent Node */
 519
 520         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 521                                        obj_desc, ACPI_TYPE_POWER);
 522
 523         /* Remove local reference to the object */
 524
 525         acpi_ut_remove_reference(obj_desc);
 526         return_ACPI_STATUS(status);
 527 }
 528 #endif
 529
 530 /*******************************************************************************
 531  *
 532  * FUNCTION:    acpi_ex_create_method
 533  *
 534  * PARAMETERS:  aml_start       - First byte of the method's AML
 535  *              aml_length      - AML byte count for this method
 536  *              walk_state      - Current state
 537  *
 538  * RETURN:      Status
 539  *
 540  * DESCRIPTION: Create a new method object
 541  *
 542  ******************************************************************************/
 543
 544 acpi_status
 545 acpi_ex_create_method(u8 * aml_start,
 546                       u32 aml_length, struct acpi_walk_state *walk_state)
 547 {
 548         union acpi_operand_object **operand = &walk_state->operands[0];
 549         union acpi_operand_object *obj_desc;
 550         acpi_status status;
 551         u8 method_flags;
 552
 553         ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
 554
 555         /* Create a new method object */
 556
 557         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
 558         if (!obj_desc) {
 559                 return_ACPI_STATUS(AE_NO_MEMORY);
 560         }
 561
 562         /* Save the method's AML pointer and length  */
 563
 564         obj_desc->method.aml_start = aml_start;
 565         obj_desc->method.aml_length = aml_length;
 566
 567         /*
 568          * Disassemble the method flags.  Split off the Arg Count
 569          * for efficiency
 570          */
 571         method_flags = (u8) operand[1]->integer.value;
 572
 573         obj_desc->method.method_flags =
 574             (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
 575         obj_desc->method.param_count =
 576             (u8) (method_flags & AML_METHOD_ARG_COUNT);
 577
 578         /*
 579          * Get the concurrency count.  If required, a semaphore will be
 580          * created for this method when it is parsed.
 581          */
 582         if (acpi_gbl_all_methods_serialized) {
 583                 obj_desc->method.concurrency = 1;
 584                 obj_desc->method.method_flags |= AML_METHOD_SERIALIZED;
 585         } else if (method_flags & AML_METHOD_SERIALIZED) {
 586                 /*
 587                  * ACPI 1.0: Concurrency = 1
 588                  * ACPI 2.0: Concurrency = (sync_level (in method declaration) + 1)
 589                  */
 590                 obj_desc->method.concurrency = (u8)
 591                     (((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1);
 592         } else {
 593                 obj_desc->method.concurrency = ACPI_INFINITE_CONCURRENCY;
 594         }
 595
 596         /* Attach the new object to the method Node */
 597
 598         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 599                                        obj_desc, ACPI_TYPE_METHOD);
 600
 601         /* Remove local reference to the object */
 602
 603         acpi_ut_remove_reference(obj_desc);
 604
 605         /* Remove a reference to the operand */
 606
 607         acpi_ut_remove_reference(operand[1]);
 608         return_ACPI_STATUS(status);
 609 }