1 /****************************************************************************** 2 * 3 * Module Name: excreate - Named object creation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2013, 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 /* 91 * For objects that can never change (i.e., the NS node will 92 * permanently point to the same object), we can simply attach 93 * the object to the new NS node. For other objects (such as 94 * Integers, buffers, etc.), we have to point the Alias node 95 * to the original Node. 96 */ 97 switch (target_node->type) { 98 99 /* For these types, the sub-object can change dynamically via a Store */ 100 101 case ACPI_TYPE_INTEGER: 102 case ACPI_TYPE_STRING: 103 case ACPI_TYPE_BUFFER: 104 case ACPI_TYPE_PACKAGE: 105 case ACPI_TYPE_BUFFER_FIELD: 106 107 /* 108 * These types open a new scope, so we need the NS node in order to access 109 * any children. 110 */ 111 case ACPI_TYPE_DEVICE: 112 case ACPI_TYPE_POWER: 113 case ACPI_TYPE_PROCESSOR: 114 case ACPI_TYPE_THERMAL: 115 case ACPI_TYPE_LOCAL_SCOPE: 116 117 /* 118 * The new alias has the type ALIAS and points to the original 119 * NS node, not the object itself. 120 */ 121 alias_node->type = ACPI_TYPE_LOCAL_ALIAS; 122 alias_node->object = 123 ACPI_CAST_PTR(union acpi_operand_object, target_node); 124 break; 125 126 case ACPI_TYPE_METHOD: 127 128 /* 129 * Control method aliases need to be differentiated 130 */ 131 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS; 132 alias_node->object = 133 ACPI_CAST_PTR(union acpi_operand_object, target_node); 134 break; 135 136 default: 137 138 /* Attach the original source object to the new Alias Node */ 139 140 /* 141 * The new alias assumes the type of the target, and it points 142 * to the same object. The reference count of the object has an 143 * additional reference to prevent deletion out from under either the 144 * target node or the alias Node 145 */ 146 status = acpi_ns_attach_object(alias_node, 147 acpi_ns_get_attached_object 148 (target_node), 149 target_node->type); 150 break; 151 } 152 153 /* Since both operands are Nodes, we don't need to delete them */ 154 155 return_ACPI_STATUS(status); 156 } 157 158 /******************************************************************************* 159 * 160 * FUNCTION: acpi_ex_create_event 161 * 162 * PARAMETERS: walk_state - Current state 163 * 164 * RETURN: Status 165 * 166 * DESCRIPTION: Create a new event object 167 * 168 ******************************************************************************/ 169 170 acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state) 171 { 172 acpi_status status; 173 union acpi_operand_object *obj_desc; 174 175 ACPI_FUNCTION_TRACE(ex_create_event); 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.os_semaphore); 189 if (ACPI_FAILURE(status)) { 190 goto cleanup; 191 } 192 193 /* Attach object to the Node */ 194 195 status = 196 acpi_ns_attach_object((struct acpi_namespace_node *)walk_state-> 197 operands[0], obj_desc, ACPI_TYPE_EVENT); 198 199 cleanup: 200 /* 201 * Remove local reference to the object (on error, will cause deletion 202 * of both object and semaphore if present.) 203 */ 204 acpi_ut_remove_reference(obj_desc); 205 return_ACPI_STATUS(status); 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 acpi_ex_create_mutex(struct acpi_walk_state *walk_state) 223 { 224 acpi_status status = AE_OK; 225 union acpi_operand_object *obj_desc; 226 227 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS); 228 229 /* Create the new mutex object */ 230 231 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); 232 if (!obj_desc) { 233 status = AE_NO_MEMORY; 234 goto cleanup; 235 } 236 237 /* Create the actual OS Mutex */ 238 239 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex); 240 if (ACPI_FAILURE(status)) { 241 goto cleanup; 242 } 243 244 /* Init object and attach to NS node */ 245 246 obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value; 247 obj_desc->mutex.node = 248 (struct acpi_namespace_node *)walk_state->operands[0]; 249 250 status = 251 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc, 252 ACPI_TYPE_MUTEX); 253 254 cleanup: 255 /* 256 * Remove local reference to the object (on error, will cause deletion 257 * of both object and semaphore if present.) 258 */ 259 acpi_ut_remove_reference(obj_desc); 260 return_ACPI_STATUS(status); 261 } 262 263 /******************************************************************************* 264 * 265 * FUNCTION: acpi_ex_create_region 266 * 267 * PARAMETERS: aml_start - Pointer to the region declaration AML 268 * aml_length - Max length of the declaration AML 269 * space_id - Address space ID for the region 270 * walk_state - Current state 271 * 272 * RETURN: Status 273 * 274 * DESCRIPTION: Create a new operation region object 275 * 276 ******************************************************************************/ 277 278 acpi_status 279 acpi_ex_create_region(u8 * aml_start, 280 u32 aml_length, 281 u8 space_id, struct acpi_walk_state *walk_state) 282 { 283 acpi_status status; 284 union acpi_operand_object *obj_desc; 285 struct acpi_namespace_node *node; 286 union acpi_operand_object *region_obj2; 287 288 ACPI_FUNCTION_TRACE(ex_create_region); 289 290 /* Get the Namespace Node */ 291 292 node = walk_state->op->common.node; 293 294 /* 295 * If the region object is already attached to this node, 296 * just return 297 */ 298 if (acpi_ns_get_attached_object(node)) { 299 return_ACPI_STATUS(AE_OK); 300 } 301 302 /* 303 * Space ID must be one of the predefined IDs, or in the user-defined 304 * range 305 */ 306 if (!acpi_is_valid_space_id(space_id)) { 307 /* 308 * Print an error message, but continue. We don't want to abort 309 * a table load for this exception. Instead, if the region is 310 * actually used at runtime, abort the executing method. 311 */ 312 ACPI_ERROR((AE_INFO, 313 "Invalid/unknown Address Space ID: 0x%2.2X", 314 space_id)); 315 } 316 317 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", 318 acpi_ut_get_region_name(space_id), space_id)); 319 320 /* Create the region descriptor */ 321 322 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION); 323 if (!obj_desc) { 324 status = AE_NO_MEMORY; 325 goto cleanup; 326 } 327 328 /* 329 * Remember location in AML stream of address & length 330 * operands since they need to be evaluated at run time. 331 */ 332 region_obj2 = obj_desc->common.next_object; 333 region_obj2->extra.aml_start = aml_start; 334 region_obj2->extra.aml_length = aml_length; 335 if (walk_state->scope_info) { 336 region_obj2->extra.scope_node = 337 walk_state->scope_info->scope.node; 338 } else { 339 region_obj2->extra.scope_node = node; 340 } 341 342 /* Init the region from the operands */ 343 344 obj_desc->region.space_id = space_id; 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 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 * FUNCTION: acpi_ex_create_processor 364 * 365 * PARAMETERS: walk_state - Current state 366 * 367 * RETURN: Status 368 * 369 * DESCRIPTION: Create a new processor object and populate the fields 370 * 371 * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3]) 372 * 373 ******************************************************************************/ 374 375 acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state) 376 { 377 union acpi_operand_object **operand = &walk_state->operands[0]; 378 union acpi_operand_object *obj_desc; 379 acpi_status status; 380 381 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state); 382 383 /* Create the processor object */ 384 385 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR); 386 if (!obj_desc) { 387 return_ACPI_STATUS(AE_NO_MEMORY); 388 } 389 390 /* Initialize the processor object from the operands */ 391 392 obj_desc->processor.proc_id = (u8) operand[1]->integer.value; 393 obj_desc->processor.length = (u8) operand[3]->integer.value; 394 obj_desc->processor.address = 395 (acpi_io_address) operand[2]->integer.value; 396 397 /* Install the processor object in the parent Node */ 398 399 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 400 obj_desc, ACPI_TYPE_PROCESSOR); 401 402 /* Remove local reference to the object */ 403 404 acpi_ut_remove_reference(obj_desc); 405 return_ACPI_STATUS(status); 406 } 407 408 /******************************************************************************* 409 * 410 * FUNCTION: acpi_ex_create_power_resource 411 * 412 * PARAMETERS: walk_state - Current state 413 * 414 * RETURN: Status 415 * 416 * DESCRIPTION: Create a new power_resource object and populate the fields 417 * 418 * power_resource (Name[0], system_level[1], resource_order[2]) 419 * 420 ******************************************************************************/ 421 422 acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state) 423 { 424 union acpi_operand_object **operand = &walk_state->operands[0]; 425 acpi_status status; 426 union acpi_operand_object *obj_desc; 427 428 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state); 429 430 /* Create the power resource object */ 431 432 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER); 433 if (!obj_desc) { 434 return_ACPI_STATUS(AE_NO_MEMORY); 435 } 436 437 /* Initialize the power object from the operands */ 438 439 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value; 440 obj_desc->power_resource.resource_order = 441 (u16) operand[2]->integer.value; 442 443 /* Install the power resource object in the parent Node */ 444 445 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 446 obj_desc, ACPI_TYPE_POWER); 447 448 /* Remove local reference to the object */ 449 450 acpi_ut_remove_reference(obj_desc); 451 return_ACPI_STATUS(status); 452 } 453 #endif 454 455 /******************************************************************************* 456 * 457 * FUNCTION: acpi_ex_create_method 458 * 459 * PARAMETERS: aml_start - First byte of the method's AML 460 * aml_length - AML byte count for this method 461 * walk_state - Current state 462 * 463 * RETURN: Status 464 * 465 * DESCRIPTION: Create a new method object 466 * 467 ******************************************************************************/ 468 469 acpi_status 470 acpi_ex_create_method(u8 * aml_start, 471 u32 aml_length, struct acpi_walk_state *walk_state) 472 { 473 union acpi_operand_object **operand = &walk_state->operands[0]; 474 union acpi_operand_object *obj_desc; 475 acpi_status status; 476 u8 method_flags; 477 478 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state); 479 480 /* Create a new method object */ 481 482 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); 483 if (!obj_desc) { 484 status = AE_NO_MEMORY; 485 goto exit; 486 } 487 488 /* Save the method's AML pointer and length */ 489 490 obj_desc->method.aml_start = aml_start; 491 obj_desc->method.aml_length = aml_length; 492 493 /* 494 * Disassemble the method flags. Split off the arg_count, Serialized 495 * flag, and sync_level for efficiency. 496 */ 497 method_flags = (u8) operand[1]->integer.value; 498 499 obj_desc->method.param_count = 500 (u8) (method_flags & AML_METHOD_ARG_COUNT); 501 502 /* 503 * Get the sync_level. If method is serialized, a mutex will be 504 * created for this method when it is parsed. 505 */ 506 if (method_flags & AML_METHOD_SERIALIZED) { 507 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED; 508 509 /* 510 * ACPI 1.0: sync_level = 0 511 * ACPI 2.0: sync_level = sync_level in method declaration 512 */ 513 obj_desc->method.sync_level = (u8) 514 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4); 515 } 516 517 /* Attach the new object to the method Node */ 518 519 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 520 obj_desc, ACPI_TYPE_METHOD); 521 522 /* Remove local reference to the object */ 523 524 acpi_ut_remove_reference(obj_desc); 525 526 exit: 527 /* Remove a reference to the operand */ 528 529 acpi_ut_remove_reference(operand[1]); 530 return_ACPI_STATUS(status); 531 } 532