1 /****************************************************************************** 2 * 3 * Module Name: excreate - Named object creation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2017, 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 } 506