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), target_node->type);
 144                 break;
 145         }
 146
 147         /* Since both operands are Nodes, we don't need to delete them */
 148
 149         return_ACPI_STATUS (status);
 150 }
 151
 152
 153 /*******************************************************************************
 154  *
 155  * FUNCTION:    acpi_ex_create_event
 156  *
 157  * PARAMETERS:  walk_state          - Current state
 158  *
 159  * RETURN:      Status
 160  *
 161  * DESCRIPTION: Create a new event object
 162  *
 163  ******************************************************************************/
 164
 165 acpi_status
 166 acpi_ex_create_event (
 167         struct acpi_walk_state          *walk_state)
 168 {
 169         acpi_status                     status;
 170         union acpi_operand_object       *obj_desc;
 171
 172
 173         ACPI_FUNCTION_TRACE ("ex_create_event");
 174
 175
 176         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_EVENT);
 177         if (!obj_desc) {
 178                 status = AE_NO_MEMORY;
 179                 goto cleanup;
 180         }
 181
 182         /*
 183          * Create the actual OS semaphore, with zero initial units -- meaning
 184          * that the event is created in an unsignalled state
 185          */
 186         status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 0,
 187                          &obj_desc->event.semaphore);
 188         if (ACPI_FAILURE (status)) {
 189                 goto cleanup;
 190         }
 191
 192         /* Attach object to the Node */
 193
 194         status = acpi_ns_attach_object ((struct acpi_namespace_node *) walk_state->operands[0],
 195                          obj_desc, ACPI_TYPE_EVENT);
 196
 197 cleanup:
 198         /*
 199          * Remove local reference to the object (on error, will cause deletion
 200          * of both object and semaphore if present.)
 201          */
 202         acpi_ut_remove_reference (obj_desc);
 203         return_ACPI_STATUS (status);
 204 }
 205
 206
 207 /*******************************************************************************
 208  *
 209  * FUNCTION:    acpi_ex_create_mutex
 210  *
 211  * PARAMETERS:  walk_state          - Current state
 212  *
 213  * RETURN:      Status
 214  *
 215  * DESCRIPTION: Create a new mutex object
 216  *
 217  *              Mutex (Name[0], sync_level[1])
 218  *
 219  ******************************************************************************/
 220
 221 acpi_status
 222 acpi_ex_create_mutex (
 223         struct acpi_walk_state          *walk_state)
 224 {
 225         acpi_status                     status = AE_OK;
 226         union acpi_operand_object       *obj_desc;
 227
 228
 229         ACPI_FUNCTION_TRACE_PTR ("ex_create_mutex", ACPI_WALK_OPERANDS);
 230
 231
 232         /* Create the new mutex object */
 233
 234         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_MUTEX);
 235         if (!obj_desc) {
 236                 status = AE_NO_MEMORY;
 237                 goto cleanup;
 238         }
 239
 240         /*
 241          * Create the actual OS semaphore.
 242          * One unit max to make it a mutex, with one initial unit to allow
 243          * the mutex to be acquired.
 244          */
 245         status = acpi_os_create_semaphore (1, 1, &obj_desc->mutex.semaphore);
 246         if (ACPI_FAILURE (status)) {
 247                 goto cleanup;
 248         }
 249
 250         /* Init object and attach to NS node */
 251
 252         obj_desc->mutex.sync_level = (u8) walk_state->operands[1]->integer.value;
 253         obj_desc->mutex.node = (struct acpi_namespace_node *) walk_state->operands[0];
 254
 255         status = acpi_ns_attach_object (obj_desc->mutex.node,
 256                          obj_desc, ACPI_TYPE_MUTEX);
 257
 258
 259 cleanup:
 260         /*
 261          * Remove local reference to the object (on error, will cause deletion
 262          * of both object and semaphore if present.)
 263          */
 264         acpi_ut_remove_reference (obj_desc);
 265         return_ACPI_STATUS (status);
 266 }
 267
 268
 269 /*******************************************************************************
 270  *
 271  * FUNCTION:    acpi_ex_create_region
 272  *
 273  * PARAMETERS:  aml_start           - Pointer to the region declaration AML
 274  *              aml_length          - Max length of the declaration AML
 275  *              region_space        - space_iD for the region
 276  *              walk_state          - Current state
 277  *
 278  * RETURN:      Status
 279  *
 280  * DESCRIPTION: Create a new operation region object
 281  *
 282  ******************************************************************************/
 283
 284 acpi_status
 285 acpi_ex_create_region (
 286         u8                              *aml_start,
 287         u32                             aml_length,
 288         u8                              region_space,
 289         struct acpi_walk_state          *walk_state)
 290 {
 291         acpi_status                     status;
 292         union acpi_operand_object       *obj_desc;
 293         struct acpi_namespace_node      *node;
 294         union acpi_operand_object       *region_obj2;
 295
 296
 297         ACPI_FUNCTION_TRACE ("ex_create_region");
 298
 299
 300         /* Get the Namespace Node */
 301
 302         node = walk_state->op->common.node;
 303
 304         /*
 305          * If the region object is already attached to this node,
 306          * just return
 307          */
 308         if (acpi_ns_get_attached_object (node)) {
 309                 return_ACPI_STATUS (AE_OK);
 310         }
 311
 312         /*
 313          * Space ID must be one of the predefined IDs, or in the user-defined
 314          * range
 315          */
 316         if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
 317                 (region_space < ACPI_USER_REGION_BEGIN)) {
 318                 ACPI_REPORT_ERROR (("Invalid address_space type %X\n", region_space));
 319                 return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
 320         }
 321
 322         ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
 323                 acpi_ut_get_region_name (region_space), region_space));
 324
 325         /* Create the region descriptor */
 326
 327         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
 328         if (!obj_desc) {
 329                 status = AE_NO_MEMORY;
 330                 goto cleanup;
 331         }
 332
 333         /*
 334          * Remember location in AML stream of address & length
 335          * operands since they need to be evaluated at run time.
 336          */
 337         region_obj2                 = obj_desc->common.next_object;
 338         region_obj2->extra.aml_start = aml_start;
 339         region_obj2->extra.aml_length = aml_length;
 340
 341         /* Init the region from the operands */
 342
 343         obj_desc->region.space_id = region_space;
 344         obj_desc->region.address = 0;
 345         obj_desc->region.length = 0;
 346         obj_desc->region.node   = node;
 347
 348         /* Install the new region object in the parent Node */
 349
 350         status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
 351
 352
 353 cleanup:
 354
 355         /* Remove local reference to the object */
 356
 357         acpi_ut_remove_reference (obj_desc);
 358         return_ACPI_STATUS (status);
 359 }
 360
 361
 362 /*******************************************************************************
 363  *
 364  * FUNCTION:    acpi_ex_create_table_region
 365  *
 366  * PARAMETERS:  walk_state          - Current state
 367  *
 368  * RETURN:      Status
 369  *
 370  * DESCRIPTION: Create a new data_table_region object
 371  *
 372  ******************************************************************************/
 373
 374 acpi_status
 375 acpi_ex_create_table_region (
 376         struct acpi_walk_state          *walk_state)
 377 {
 378         acpi_status                     status;
 379         union acpi_operand_object       **operand = &walk_state->operands[0];
 380         union acpi_operand_object       *obj_desc;
 381         struct acpi_namespace_node      *node;
 382         struct acpi_table_header        *table;
 383         union acpi_operand_object       *region_obj2;
 384
 385
 386         ACPI_FUNCTION_TRACE ("ex_create_table_region");
 387
 388
 389         /* Get the Node from the object stack  */
 390
 391         node = walk_state->op->common.node;
 392
 393         /*
 394          * If the region object is already attached to this node,
 395          * just return
 396          */
 397         if (acpi_ns_get_attached_object (node)) {
 398                 return_ACPI_STATUS (AE_OK);
 399         }
 400
 401         /* Find the ACPI table */
 402
 403         status = acpi_tb_find_table (operand[1]->string.pointer,
 404                            operand[2]->string.pointer,
 405                            operand[3]->string.pointer, &table);
 406         if (ACPI_FAILURE (status)) {
 407                 return_ACPI_STATUS (status);
 408         }
 409
 410         /* Create the region descriptor */
 411
 412         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_REGION);
 413         if (!obj_desc) {
 414                 return_ACPI_STATUS (AE_NO_MEMORY);
 415         }
 416
 417         region_obj2                     = obj_desc->common.next_object;
 418         region_obj2->extra.region_context = NULL;
 419
 420         /* Init the region from the operands */
 421
 422         obj_desc->region.space_id = REGION_DATA_TABLE;
 423         obj_desc->region.address = (acpi_physical_address) ACPI_TO_INTEGER (table);
 424         obj_desc->region.length = table->length;
 425         obj_desc->region.node   = node;
 426         obj_desc->region.flags  = AOPOBJ_DATA_VALID;
 427
 428         /* Install the new region object in the parent Node */
 429
 430         status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_REGION);
 431         if (ACPI_FAILURE (status)) {
 432                 goto cleanup;
 433         }
 434
 435         status = acpi_ev_initialize_region (obj_desc, FALSE);
 436         if (ACPI_FAILURE (status)) {
 437                 if (status == AE_NOT_EXIST) {
 438                         status = AE_OK;
 439                 }
 440                 else {
 441                         goto cleanup;
 442                 }
 443         }
 444
 445         obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;
 446
 447
 448 cleanup:
 449
 450         /* Remove local reference to the object */
 451
 452         acpi_ut_remove_reference (obj_desc);
 453         return_ACPI_STATUS (status);
 454 }
 455
 456
 457 /*******************************************************************************
 458  *
 459  * FUNCTION:    acpi_ex_create_processor
 460  *
 461  * PARAMETERS:  walk_state          - Current state
 462  *
 463  * RETURN:      Status
 464  *
 465  * DESCRIPTION: Create a new processor object and populate the fields
 466  *
 467  *              Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
 468  *
 469  ******************************************************************************/
 470
 471 acpi_status
 472 acpi_ex_create_processor (
 473         struct acpi_walk_state          *walk_state)
 474 {
 475         union acpi_operand_object       **operand = &walk_state->operands[0];
 476         union acpi_operand_object       *obj_desc;
 477         acpi_status                     status;
 478
 479
 480         ACPI_FUNCTION_TRACE_PTR ("ex_create_processor", walk_state);
 481
 482
 483         /* Create the processor object */
 484
 485         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PROCESSOR);
 486         if (!obj_desc) {
 487                 return_ACPI_STATUS (AE_NO_MEMORY);
 488         }
 489
 490         /* Initialize the processor object from the operands */
 491
 492         obj_desc->processor.proc_id = (u8)          operand[1]->integer.value;
 493         obj_desc->processor.address = (acpi_io_address) operand[2]->integer.value;
 494         obj_desc->processor.length = (u8)           operand[3]->integer.value;
 495
 496         /* Install the processor object in the parent Node */
 497
 498         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 499                           obj_desc, ACPI_TYPE_PROCESSOR);
 500
 501         /* Remove local reference to the object */
 502
 503         acpi_ut_remove_reference (obj_desc);
 504         return_ACPI_STATUS (status);
 505 }
 506
 507
 508 /*******************************************************************************
 509  *
 510  * FUNCTION:    acpi_ex_create_power_resource
 511  *
 512  * PARAMETERS:  walk_state          - Current state
 513  *
 514  * RETURN:      Status
 515  *
 516  * DESCRIPTION: Create a new power_resource object and populate the fields
 517  *
 518  *              power_resource (Name[0], system_level[1], resource_order[2])
 519  *
 520  ******************************************************************************/
 521
 522 acpi_status
 523 acpi_ex_create_power_resource (
 524         struct acpi_walk_state          *walk_state)
 525 {
 526         union acpi_operand_object       **operand = &walk_state->operands[0];
 527         acpi_status                     status;
 528         union acpi_operand_object       *obj_desc;
 529
 530
 531         ACPI_FUNCTION_TRACE_PTR ("ex_create_power_resource", walk_state);
 532
 533
 534         /* Create the power resource object */
 535
 536         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_POWER);
 537         if (!obj_desc) {
 538                 return_ACPI_STATUS (AE_NO_MEMORY);
 539         }
 540
 541         /* Initialize the power object from the operands */
 542
 543         obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
 544         obj_desc->power_resource.resource_order = (u16) operand[2]->integer.value;
 545
 546         /* Install the  power resource object in the parent Node */
 547
 548         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 549                           obj_desc, ACPI_TYPE_POWER);
 550
 551         /* Remove local reference to the object */
 552
 553         acpi_ut_remove_reference (obj_desc);
 554         return_ACPI_STATUS (status);
 555 }
 556 #endif
 557
 558
 559 /*******************************************************************************
 560  *
 561  * FUNCTION:    acpi_ex_create_method
 562  *
 563  * PARAMETERS:  aml_start       - First byte of the method's AML
 564  *              aml_length      - AML byte count for this method
 565  *              walk_state      - Current state
 566  *
 567  * RETURN:      Status
 568  *
 569  * DESCRIPTION: Create a new method object
 570  *
 571  ******************************************************************************/
 572
 573 acpi_status
 574 acpi_ex_create_method (
 575         u8                              *aml_start,
 576         u32                             aml_length,
 577         struct acpi_walk_state          *walk_state)
 578 {
 579         union acpi_operand_object       **operand = &walk_state->operands[0];
 580         union acpi_operand_object       *obj_desc;
 581         acpi_status                     status;
 582         u8                              method_flags;
 583
 584
 585         ACPI_FUNCTION_TRACE_PTR ("ex_create_method", walk_state);
 586
 587
 588         /* Create a new method object */
 589
 590         obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_METHOD);
 591         if (!obj_desc) {
 592            return_ACPI_STATUS (AE_NO_MEMORY);
 593         }
 594
 595         /* Save the method's AML pointer and length  */
 596
 597         obj_desc->method.aml_start = aml_start;
 598         obj_desc->method.aml_length = aml_length;
 599
 600         /*
 601          * Disassemble the method flags.  Split off the Arg Count
 602          * for efficiency
 603          */
 604         method_flags = (u8) operand[1]->integer.value;
 605
 606         obj_desc->method.method_flags = (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
 607         obj_desc->method.param_count = (u8) (method_flags & AML_METHOD_ARG_COUNT);
 608
 609         /*
 610          * Get the concurrency count.  If required, a semaphore will be
 611          * created for this method when it is parsed.
 612          */
 613         if (acpi_gbl_all_methods_serialized) {
 614                 obj_desc->method.concurrency = 1;
 615                 obj_desc->method.method_flags |= AML_METHOD_SERIALIZED;
 616         }
 617         else if (method_flags & AML_METHOD_SERIALIZED) {
 618                 /*
 619                  * ACPI 1.0: Concurrency = 1
 620                  * ACPI 2.0: Concurrency = (sync_level (in method declaration) + 1)
 621                  */
 622                 obj_desc->method.concurrency = (u8)
 623                                   (((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4) + 1);
 624         }
 625         else {
 626                 obj_desc->method.concurrency = ACPI_INFINITE_CONCURRENCY;
 627         }
 628
 629         /* Attach the new object to the method Node */
 630
 631         status = acpi_ns_attach_object ((struct acpi_namespace_node *) operand[0],
 632                           obj_desc, ACPI_TYPE_METHOD);
 633
 634         /* Remove local reference to the object */
 635
 636         acpi_ut_remove_reference (obj_desc);
 637
 638         /* Remove a reference to the operand */
 639
 640         acpi_ut_remove_reference (operand[1]);
 641         return_ACPI_STATUS (status);
 642 }
 643
 644