1 /****************************************************************************** 2 * 3 * Module Name: excreate - Named object creation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2014, 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 * These types open a new scope, so we need the NS node in order to access 108 * any children. 109 */ 110 case ACPI_TYPE_DEVICE: 111 case ACPI_TYPE_POWER: 112 case ACPI_TYPE_PROCESSOR: 113 case ACPI_TYPE_THERMAL: 114 case ACPI_TYPE_LOCAL_SCOPE: 115 /* 116 * The new alias has the type ALIAS and points to the original 117 * NS node, not the object itself. 118 */ 119 alias_node->type = ACPI_TYPE_LOCAL_ALIAS; 120 alias_node->object = 121 ACPI_CAST_PTR(union acpi_operand_object, target_node); 122 break; 123 124 case ACPI_TYPE_METHOD: 125 /* 126 * Control method aliases need to be differentiated 127 */ 128 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS; 129 alias_node->object = 130 ACPI_CAST_PTR(union acpi_operand_object, target_node); 131 break; 132 133 default: 134 135 /* Attach the original source object to the new Alias Node */ 136 137 /* 138 * The new alias assumes the type of the target, and it points 139 * to the same object. The reference count of the object has an 140 * additional reference to prevent deletion out from under either the 141 * target node or the alias Node 142 */ 143 status = acpi_ns_attach_object(alias_node, 144 acpi_ns_get_attached_object 145 (target_node), 146 target_node->type); 147 break; 148 } 149 150 /* Since both operands are Nodes, we don't need to delete them */ 151 152 return_ACPI_STATUS(status); 153 } 154 155 /******************************************************************************* 156 * 157 * FUNCTION: acpi_ex_create_event 158 * 159 * PARAMETERS: walk_state - Current state 160 * 161 * RETURN: Status 162 * 163 * DESCRIPTION: Create a new event object 164 * 165 ******************************************************************************/ 166 167 acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state) 168 { 169 acpi_status status; 170 union acpi_operand_object *obj_desc; 171 172 ACPI_FUNCTION_TRACE(ex_create_event); 173 174 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT); 175 if (!obj_desc) { 176 status = AE_NO_MEMORY; 177 goto cleanup; 178 } 179 180 /* 181 * Create the actual OS semaphore, with zero initial units -- meaning 182 * that the event is created in an unsignalled state 183 */ 184 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, 185 &obj_desc->event.os_semaphore); 186 if (ACPI_FAILURE(status)) { 187 goto cleanup; 188 } 189 190 /* Attach object to the Node */ 191 192 status = 193 acpi_ns_attach_object((struct acpi_namespace_node *)walk_state-> 194 operands[0], obj_desc, ACPI_TYPE_EVENT); 195 196 cleanup: 197 /* 198 * Remove local reference to the object (on error, will cause deletion 199 * of both object and semaphore if present.) 200 */ 201 acpi_ut_remove_reference(obj_desc); 202 return_ACPI_STATUS(status); 203 } 204 205 /******************************************************************************* 206 * 207 * FUNCTION: acpi_ex_create_mutex 208 * 209 * PARAMETERS: walk_state - Current state 210 * 211 * RETURN: Status 212 * 213 * DESCRIPTION: Create a new mutex object 214 * 215 * Mutex (Name[0], sync_level[1]) 216 * 217 ******************************************************************************/ 218 219 acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state) 220 { 221 acpi_status status = AE_OK; 222 union acpi_operand_object *obj_desc; 223 224 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS); 225 226 /* Create the new mutex object */ 227 228 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); 229 if (!obj_desc) { 230 status = AE_NO_MEMORY; 231 goto cleanup; 232 } 233 234 /* Create the actual OS Mutex */ 235 236 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex); 237 if (ACPI_FAILURE(status)) { 238 goto cleanup; 239 } 240 241 /* Init object and attach to NS node */ 242 243 obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value; 244 obj_desc->mutex.node = 245 (struct acpi_namespace_node *)walk_state->operands[0]; 246 247 status = 248 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc, 249 ACPI_TYPE_MUTEX); 250 251 cleanup: 252 /* 253 * Remove local reference to the object (on error, will cause deletion 254 * of both object and semaphore if present.) 255 */ 256 acpi_ut_remove_reference(obj_desc); 257 return_ACPI_STATUS(status); 258 } 259 260 /******************************************************************************* 261 * 262 * FUNCTION: acpi_ex_create_region 263 * 264 * PARAMETERS: aml_start - Pointer to the region declaration AML 265 * aml_length - Max length of the declaration AML 266 * space_id - Address space ID for the region 267 * walk_state - Current state 268 * 269 * RETURN: Status 270 * 271 * DESCRIPTION: Create a new operation region object 272 * 273 ******************************************************************************/ 274 275 acpi_status 276 acpi_ex_create_region(u8 * aml_start, 277 u32 aml_length, 278 u8 space_id, struct acpi_walk_state *walk_state) 279 { 280 acpi_status status; 281 union acpi_operand_object *obj_desc; 282 struct acpi_namespace_node *node; 283 union acpi_operand_object *region_obj2; 284 285 ACPI_FUNCTION_TRACE(ex_create_region); 286 287 /* Get the Namespace Node */ 288 289 node = walk_state->op->common.node; 290 291 /* 292 * If the region object is already attached to this node, 293 * just return 294 */ 295 if (acpi_ns_get_attached_object(node)) { 296 return_ACPI_STATUS(AE_OK); 297 } 298 299 /* 300 * Space ID must be one of the predefined IDs, or in the user-defined 301 * range 302 */ 303 if (!acpi_is_valid_space_id(space_id)) { 304 /* 305 * Print an error message, but continue. We don't want to abort 306 * a table load for this exception. Instead, if the region is 307 * actually used at runtime, abort the executing method. 308 */ 309 ACPI_ERROR((AE_INFO, 310 "Invalid/unknown Address Space ID: 0x%2.2X", 311 space_id)); 312 } 313 314 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", 315 acpi_ut_get_region_name(space_id), space_id)); 316 317 /* Create the region descriptor */ 318 319 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION); 320 if (!obj_desc) { 321 status = AE_NO_MEMORY; 322 goto cleanup; 323 } 324 325 /* 326 * Remember location in AML stream of address & length 327 * operands since they need to be evaluated at run time. 328 */ 329 region_obj2 = obj_desc->common.next_object; 330 region_obj2->extra.aml_start = aml_start; 331 region_obj2->extra.aml_length = aml_length; 332 if (walk_state->scope_info) { 333 region_obj2->extra.scope_node = 334 walk_state->scope_info->scope.node; 335 } else { 336 region_obj2->extra.scope_node = node; 337 } 338 339 /* Init the region from the operands */ 340 341 obj_desc->region.space_id = space_id; 342 obj_desc->region.address = 0; 343 obj_desc->region.length = 0; 344 obj_desc->region.node = node; 345 346 /* Install the new region object in the parent Node */ 347 348 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION); 349 350 cleanup: 351 352 /* Remove local reference to the object */ 353 354 acpi_ut_remove_reference(obj_desc); 355 return_ACPI_STATUS(status); 356 } 357 358 /******************************************************************************* 359 * 360 * FUNCTION: acpi_ex_create_processor 361 * 362 * PARAMETERS: walk_state - Current state 363 * 364 * RETURN: Status 365 * 366 * DESCRIPTION: Create a new processor object and populate the fields 367 * 368 * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3]) 369 * 370 ******************************************************************************/ 371 372 acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state) 373 { 374 union acpi_operand_object **operand = &walk_state->operands[0]; 375 union acpi_operand_object *obj_desc; 376 acpi_status status; 377 378 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state); 379 380 /* Create the processor object */ 381 382 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR); 383 if (!obj_desc) { 384 return_ACPI_STATUS(AE_NO_MEMORY); 385 } 386 387 /* Initialize the processor object from the operands */ 388 389 obj_desc->processor.proc_id = (u8) operand[1]->integer.value; 390 obj_desc->processor.length = (u8) operand[3]->integer.value; 391 obj_desc->processor.address = 392 (acpi_io_address) operand[2]->integer.value; 393 394 /* Install the processor object in the parent Node */ 395 396 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 397 obj_desc, ACPI_TYPE_PROCESSOR); 398 399 /* Remove local reference to the object */ 400 401 acpi_ut_remove_reference(obj_desc); 402 return_ACPI_STATUS(status); 403 } 404 405 /******************************************************************************* 406 * 407 * FUNCTION: acpi_ex_create_power_resource 408 * 409 * PARAMETERS: walk_state - Current state 410 * 411 * RETURN: Status 412 * 413 * DESCRIPTION: Create a new power_resource object and populate the fields 414 * 415 * power_resource (Name[0], system_level[1], resource_order[2]) 416 * 417 ******************************************************************************/ 418 419 acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state) 420 { 421 union acpi_operand_object **operand = &walk_state->operands[0]; 422 acpi_status status; 423 union acpi_operand_object *obj_desc; 424 425 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state); 426 427 /* Create the power resource object */ 428 429 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER); 430 if (!obj_desc) { 431 return_ACPI_STATUS(AE_NO_MEMORY); 432 } 433 434 /* Initialize the power object from the operands */ 435 436 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value; 437 obj_desc->power_resource.resource_order = 438 (u16) operand[2]->integer.value; 439 440 /* Install the power resource object in the parent Node */ 441 442 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 443 obj_desc, ACPI_TYPE_POWER); 444 445 /* Remove local reference to the object */ 446 447 acpi_ut_remove_reference(obj_desc); 448 return_ACPI_STATUS(status); 449 } 450 #endif 451 452 /******************************************************************************* 453 * 454 * FUNCTION: acpi_ex_create_method 455 * 456 * PARAMETERS: aml_start - First byte of the method's AML 457 * aml_length - AML byte count for this method 458 * walk_state - Current state 459 * 460 * RETURN: Status 461 * 462 * DESCRIPTION: Create a new method object 463 * 464 ******************************************************************************/ 465 466 acpi_status 467 acpi_ex_create_method(u8 * aml_start, 468 u32 aml_length, struct acpi_walk_state *walk_state) 469 { 470 union acpi_operand_object **operand = &walk_state->operands[0]; 471 union acpi_operand_object *obj_desc; 472 acpi_status status; 473 u8 method_flags; 474 475 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state); 476 477 /* Create a new method object */ 478 479 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); 480 if (!obj_desc) { 481 status = AE_NO_MEMORY; 482 goto exit; 483 } 484 485 /* Save the method's AML pointer and length */ 486 487 obj_desc->method.aml_start = aml_start; 488 obj_desc->method.aml_length = aml_length; 489 490 /* 491 * Disassemble the method flags. Split off the arg_count, Serialized 492 * flag, and sync_level for efficiency. 493 */ 494 method_flags = (u8) operand[1]->integer.value; 495 496 obj_desc->method.param_count = 497 (u8) (method_flags & AML_METHOD_ARG_COUNT); 498 499 /* 500 * Get the sync_level. If method is serialized, a mutex will be 501 * created for this method when it is parsed. 502 */ 503 if (method_flags & AML_METHOD_SERIALIZED) { 504 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED; 505 506 /* 507 * ACPI 1.0: sync_level = 0 508 * ACPI 2.0: sync_level = sync_level in method declaration 509 */ 510 obj_desc->method.sync_level = (u8) 511 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4); 512 } 513 514 /* Attach the new object to the method Node */ 515 516 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], 517 obj_desc, ACPI_TYPE_METHOD); 518 519 /* Remove local reference to the object */ 520 521 acpi_ut_remove_reference(obj_desc); 522 523 exit: 524 /* Remove a reference to the operand */ 525 526 acpi_ut_remove_reference(operand[1]); 527 return_ACPI_STATUS(status); 528 } 529