drivers/acpi/acpica/excreate.c

   1 /******************************************************************************
   2  *
   3  * Module Name: excreate - Named object creation
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2018, Intel Corp.
   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 "accommon.h"
  46 #include "acinterp.h"
  47 #include "amlcode.h"
  48 #include "acnamesp.h"
  49
  50 #define _COMPONENT          ACPI_EXECUTER
  51 ACPI_MODULE_NAME("excreate")
  52 #ifndef ACPI_NO_METHOD_EXECUTION
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_ex_create_alias
  56  *
  57  * PARAMETERS:  walk_state           - Current state, contains operands
  58  *
  59  * RETURN:      Status
  60  *
  61  * DESCRIPTION: Create a new named alias
  62  *
  63  ******************************************************************************/
  64 acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
  65 {
  66         struct acpi_namespace_node *target_node;
  67         struct acpi_namespace_node *alias_node;
  68         acpi_status status = AE_OK;
  69
  70         ACPI_FUNCTION_TRACE(ex_create_alias);
  71
  72         /* Get the source/alias operands (both namespace nodes) */
  73
  74         alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
  75         target_node = (struct acpi_namespace_node *)walk_state->operands[1];
  76
  77         if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
  78             (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
  79                 /*
  80                  * Dereference an existing alias so that we don't create a chain
  81                  * of aliases. With this code, we guarantee that an alias is
  82                  * always exactly one level of indirection away from the
  83                  * actual aliased name.
  84                  */
  85                 target_node =
  86                     ACPI_CAST_PTR(struct acpi_namespace_node,
  87                                   target_node->object);
  88         }
  89
  90         /* Ensure that the target node is valid */
  91
  92         if (!target_node) {
  93                 return_ACPI_STATUS(AE_NULL_OBJECT);
  94         }
  95
  96         /* Construct the alias object (a namespace node) */
  97
  98         switch (target_node->type) {
  99         case ACPI_TYPE_METHOD:
 100                 /*
 101                  * Control method aliases need to be differentiated with
 102                  * a special type
 103                  */
 104                 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
 105                 break;
 106
 107         default:
 108                 /*
 109                  * All other object types.
 110                  *
 111                  * The new alias has the type ALIAS and points to the original
 112                  * NS node, not the object itself.
 113                  */
 114                 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
 115                 alias_node->object =
 116                     ACPI_CAST_PTR(union acpi_operand_object, target_node);
 117                 break;
 118         }
 119
 120         /* Since both operands are Nodes, we don't need to delete them */
 121
 122         alias_node->object =
 123             ACPI_CAST_PTR(union acpi_operand_object, target_node);
 124         return_ACPI_STATUS(status);
 125 }
 126
 127 /*******************************************************************************
 128  *
 129  * FUNCTION:    acpi_ex_create_event
 130  *
 131  * PARAMETERS:  walk_state          - Current state
 132  *
 133  * RETURN:      Status
 134  *
 135  * DESCRIPTION: Create a new event object
 136  *
 137  ******************************************************************************/
 138
 139 acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
 140 {
 141         acpi_status status;
 142         union acpi_operand_object *obj_desc;
 143
 144         ACPI_FUNCTION_TRACE(ex_create_event);
 145
 146         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
 147         if (!obj_desc) {
 148                 status = AE_NO_MEMORY;
 149                 goto cleanup;
 150         }
 151
 152         /*
 153          * Create the actual OS semaphore, with zero initial units -- meaning
 154          * that the event is created in an unsignalled state
 155          */
 156         status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
 157                                           &obj_desc->event.os_semaphore);
 158         if (ACPI_FAILURE(status)) {
 159                 goto cleanup;
 160         }
 161
 162         /* Attach object to the Node */
 163
 164         status = acpi_ns_attach_object((struct acpi_namespace_node *)
 165                                        walk_state->operands[0], obj_desc,
 166                                        ACPI_TYPE_EVENT);
 167
 168 cleanup:
 169         /*
 170          * Remove local reference to the object (on error, will cause deletion
 171          * of both object and semaphore if present.)
 172          */
 173         acpi_ut_remove_reference(obj_desc);
 174         return_ACPI_STATUS(status);
 175 }
 176
 177 /*******************************************************************************
 178  *
 179  * FUNCTION:    acpi_ex_create_mutex
 180  *
 181  * PARAMETERS:  walk_state          - Current state
 182  *
 183  * RETURN:      Status
 184  *
 185  * DESCRIPTION: Create a new mutex object
 186  *
 187  *              Mutex (Name[0], sync_level[1])
 188  *
 189  ******************************************************************************/
 190
 191 acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
 192 {
 193         acpi_status status = AE_OK;
 194         union acpi_operand_object *obj_desc;
 195
 196         ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
 197
 198         /* Create the new mutex object */
 199
 200         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
 201         if (!obj_desc) {
 202                 status = AE_NO_MEMORY;
 203                 goto cleanup;
 204         }
 205
 206         /* Create the actual OS Mutex */
 207
 208         status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
 209         if (ACPI_FAILURE(status)) {
 210                 goto cleanup;
 211         }
 212
 213         /* Init object and attach to NS node */
 214
 215         obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value;
 216         obj_desc->mutex.node =
 217             (struct acpi_namespace_node *)walk_state->operands[0];
 218
 219         status =
 220             acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
 221                                   ACPI_TYPE_MUTEX);
 222
 223 cleanup:
 224         /*
 225          * Remove local reference to the object (on error, will cause deletion
 226          * of both object and semaphore if present.)
 227          */
 228         acpi_ut_remove_reference(obj_desc);
 229         return_ACPI_STATUS(status);
 230 }
 231
 232 /*******************************************************************************
 233  *
 234  * FUNCTION:    acpi_ex_create_region
 235  *
 236  * PARAMETERS:  aml_start           - Pointer to the region declaration AML
 237  *              aml_length          - Max length of the declaration AML
 238  *              space_id            - Address space ID for the region
 239  *              walk_state          - Current state
 240  *
 241  * RETURN:      Status
 242  *
 243  * DESCRIPTION: Create a new operation region object
 244  *
 245  ******************************************************************************/
 246
 247 acpi_status
 248 acpi_ex_create_region(u8 * aml_start,
 249                       u32 aml_length,
 250                       u8 space_id, struct acpi_walk_state *walk_state)
 251 {
 252         acpi_status status;
 253         union acpi_operand_object *obj_desc;
 254         struct acpi_namespace_node *node;
 255         union acpi_operand_object *region_obj2;
 256
 257         ACPI_FUNCTION_TRACE(ex_create_region);
 258
 259         /* Get the Namespace Node */
 260
 261         node = walk_state->op->common.node;
 262
 263         /*
 264          * If the region object is already attached to this node,
 265          * just return
 266          */
 267         if (acpi_ns_get_attached_object(node)) {
 268                 return_ACPI_STATUS(AE_OK);
 269         }
 270
 271         /*
 272          * Space ID must be one of the predefined IDs, or in the user-defined
 273          * range
 274          */
 275         if (!acpi_is_valid_space_id(space_id)) {
 276                 /*
 277                  * Print an error message, but continue. We don't want to abort
 278                  * a table load for this exception. Instead, if the region is
 279                  * actually used at runtime, abort the executing method.
 280                  */
 281                 ACPI_ERROR((AE_INFO,
 282                             "Invalid/unknown Address Space ID: 0x%2.2X",
 283                             space_id));
 284         }
 285
 286         ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
 287                           acpi_ut_get_region_name(space_id), space_id));
 288
 289         /* Create the region descriptor */
 290
 291         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
 292         if (!obj_desc) {
 293                 status = AE_NO_MEMORY;
 294                 goto cleanup;
 295         }
 296
 297         /*
 298          * Remember location in AML stream of address & length
 299          * operands since they need to be evaluated at run time.
 300          */
 301         region_obj2 = acpi_ns_get_secondary_object(obj_desc);
 302         region_obj2->extra.aml_start = aml_start;
 303         region_obj2->extra.aml_length = aml_length;
 304         region_obj2->extra.method_REG = NULL;
 305         if (walk_state->scope_info) {
 306                 region_obj2->extra.scope_node =
 307                     walk_state->scope_info->scope.node;
 308         } else {
 309                 region_obj2->extra.scope_node = node;
 310         }
 311
 312         /* Init the region from the operands */
 313
 314         obj_desc->region.space_id = space_id;
 315         obj_desc->region.address = 0;
 316         obj_desc->region.length = 0;
 317         obj_desc->region.node = node;
 318         obj_desc->region.handler = NULL;
 319         obj_desc->common.flags &=
 320             ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
 321               AOPOBJ_OBJECT_INITIALIZED);
 322
 323         /* Install the new region object in the parent Node */
 324
 325         status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
 326
 327 cleanup:
 328
 329         /* Remove local reference to the object */
 330
 331         acpi_ut_remove_reference(obj_desc);
 332         return_ACPI_STATUS(status);
 333 }
 334
 335 /*******************************************************************************
 336  *
 337  * FUNCTION:    acpi_ex_create_processor
 338  *
 339  * PARAMETERS:  walk_state          - Current state
 340  *
 341  * RETURN:      Status
 342  *
 343  * DESCRIPTION: Create a new processor object and populate the fields
 344  *
 345  *              Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3])
 346  *
 347  ******************************************************************************/
 348
 349 acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
 350 {
 351         union acpi_operand_object **operand = &walk_state->operands[0];
 352         union acpi_operand_object *obj_desc;
 353         acpi_status status;
 354
 355         ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
 356
 357         /* Create the processor object */
 358
 359         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
 360         if (!obj_desc) {
 361                 return_ACPI_STATUS(AE_NO_MEMORY);
 362         }
 363
 364         /* Initialize the processor object from the operands */
 365
 366         obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
 367         obj_desc->processor.length = (u8) operand[3]->integer.value;
 368         obj_desc->processor.address =
 369             (acpi_io_address)operand[2]->integer.value;
 370
 371         /* Install the processor object in the parent Node */
 372
 373         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 374                                        obj_desc, ACPI_TYPE_PROCESSOR);
 375
 376         /* Remove local reference to the object */
 377
 378         acpi_ut_remove_reference(obj_desc);
 379         return_ACPI_STATUS(status);
 380 }
 381
 382 /*******************************************************************************
 383  *
 384  * FUNCTION:    acpi_ex_create_power_resource
 385  *
 386  * PARAMETERS:  walk_state          - Current state
 387  *
 388  * RETURN:      Status
 389  *
 390  * DESCRIPTION: Create a new power_resource object and populate the fields
 391  *
 392  *              power_resource (Name[0], system_level[1], resource_order[2])
 393  *
 394  ******************************************************************************/
 395
 396 acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
 397 {
 398         union acpi_operand_object **operand = &walk_state->operands[0];
 399         acpi_status status;
 400         union acpi_operand_object *obj_desc;
 401
 402         ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
 403
 404         /* Create the power resource object */
 405
 406         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
 407         if (!obj_desc) {
 408                 return_ACPI_STATUS(AE_NO_MEMORY);
 409         }
 410
 411         /* Initialize the power object from the operands */
 412
 413         obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
 414         obj_desc->power_resource.resource_order =
 415             (u16) operand[2]->integer.value;
 416
 417         /* Install the  power resource object in the parent Node */
 418
 419         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 420                                        obj_desc, ACPI_TYPE_POWER);
 421
 422         /* Remove local reference to the object */
 423
 424         acpi_ut_remove_reference(obj_desc);
 425         return_ACPI_STATUS(status);
 426 }
 427 #endif
 428
 429 /*******************************************************************************
 430  *
 431  * FUNCTION:    acpi_ex_create_method
 432  *
 433  * PARAMETERS:  aml_start       - First byte of the method's AML
 434  *              aml_length      - AML byte count for this method
 435  *              walk_state      - Current state
 436  *
 437  * RETURN:      Status
 438  *
 439  * DESCRIPTION: Create a new method object
 440  *
 441  ******************************************************************************/
 442
 443 acpi_status
 444 acpi_ex_create_method(u8 * aml_start,
 445                       u32 aml_length, struct acpi_walk_state *walk_state)
 446 {
 447         union acpi_operand_object **operand = &walk_state->operands[0];
 448         union acpi_operand_object *obj_desc;
 449         acpi_status status;
 450         u8 method_flags;
 451
 452         ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
 453
 454         /* Create a new method object */
 455
 456         obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
 457         if (!obj_desc) {
 458                 status = AE_NO_MEMORY;
 459                 goto exit;
 460         }
 461
 462         /* Save the method's AML pointer and length  */
 463
 464         obj_desc->method.aml_start = aml_start;
 465         obj_desc->method.aml_length = aml_length;
 466         obj_desc->method.node = operand[0];
 467
 468         /*
 469          * Disassemble the method flags. Split off the arg_count, Serialized
 470          * flag, and sync_level for efficiency.
 471          */
 472         method_flags = (u8)operand[1]->integer.value;
 473         obj_desc->method.param_count = (u8)
 474             (method_flags & AML_METHOD_ARG_COUNT);
 475
 476         /*
 477          * Get the sync_level. If method is serialized, a mutex will be
 478          * created for this method when it is parsed.
 479          */
 480         if (method_flags & AML_METHOD_SERIALIZED) {
 481                 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
 482
 483                 /*
 484                  * ACPI 1.0: sync_level = 0
 485                  * ACPI 2.0: sync_level = sync_level in method declaration
 486                  */
 487                 obj_desc->method.sync_level = (u8)
 488                     ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
 489         }
 490
 491         /* Attach the new object to the method Node */
 492
 493         status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
 494                                        obj_desc, ACPI_TYPE_METHOD);
 495
 496         /* Remove local reference to the object */
 497
 498         acpi_ut_remove_reference(obj_desc);
 499
 500 exit:
 501         /* Remove a reference to the operand */
 502
 503         acpi_ut_remove_reference(operand[1]);
 504         return_ACPI_STATUS(status);
 505 }