| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | /******************************************************************************* | |||
| 2 | * | |||
| 3 | * Module Name: nsaccess - Top-level functions for accessing ACPI namespace | |||
| 4 | * | |||
| 5 | ******************************************************************************/ | |||
| 6 | ||||
| 7 | /* | |||
| 8 | * Copyright (C) 2000 - 2006, 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 | #include <acpi/acpi.h> | |||
| 45 | #include <acpi/amlcode.h> | |||
| 46 | #include <acpi/acnamesp.h> | |||
| 47 | #include <acpi/acdispat.h> | |||
| 48 | ||||
| 49 | #define _COMPONENT ACPI_NAMESPACE | |||
| 50 | ACPI_MODULE_NAME("nsaccess") | |||
| 51 | ||||
| 52 | /******************************************************************************* | |||
| 53 | * | |||
| 54 | * FUNCTION: acpi_ns_root_initialize | |||
| 55 | * | |||
| 56 | * PARAMETERS: None | |||
| 57 | * | |||
| 58 | * RETURN: Status | |||
| 59 | * | |||
| 60 | * DESCRIPTION: Allocate and initialize the default root named objects | |||
| 61 | * | |||
| 62 | * MUTEX: Locks namespace for entire execution | |||
| 63 | * | |||
| 64 | ******************************************************************************/ | |||
| 6 | 0 | 65 | acpi_status acpi_ns_root_initialize(void) | |
| 66 | { | |||
| 67 | acpi_status status; | |||
| 68 | const struct acpi_predefined_names *init_val = NULL; | |||
| 69 | struct acpi_namespace_node *new_node; | |||
| 70 | union acpi_operand_object *obj_desc; | |||
| 71 | acpi_string val = NULL; | |||
| 72 | ||||
| 73 | ACPI_FUNCTION_TRACE("ns_root_initialize"); | |||
| 74 | ||||
| 75 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |||
| 0 | 6 | - | 76 | if (ACPI_FAILURE(status)) { |
| 0 | - | 77 | return_ACPI_STATUS(status); | |
| 78 | } | |||
| 79 | ||||
| 80 | /* | |||
| 81 | * The global root ptr is initially NULL, so a non-NULL value indicates | |||
| 82 | * that acpi_ns_root_initialize() has already been called; just return. | |||
| 83 | */ | |||
| 0 | 6 | - | 84 | if (acpi_gbl_root_node) { |
| 85 | status = AE_OK; | |||
| 0 | - | 86 | goto unlock_and_exit; | |
| 87 | } | |||
| 88 | ||||
| 89 | /* | |||
| 90 | * Tell the rest of the subsystem that the root is initialized | |||
| 91 | * (This is OK because the namespace is locked) | |||
| 92 | */ | |||
| 93 | acpi_gbl_root_node = &acpi_gbl_root_node_struct; | |||
| 94 | ||||
| 95 | /* Enter the pre-defined names in the name table */ | |||
| 96 | ||||
| 97 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |||
| 98 | "Entering predefined entries into namespace\n")); | |||
| 99 | ||||
| 54 | 6 | 100 | for (init_val = acpi_gbl_pre_defined_names; init_val->name; init_val++) { | |
| 101 | /* _OSI is optional for now, will be permanent later */ | |||
| 102 | ||||
| 103 | if (!ACPI_STRCMP(init_val->name, "_OSI") | |||
| 0 | 54 | - | 104 | && !acpi_gbl_create_osi_method) { |
| 0 | - | 104 | T && T | |
| 6 | 104 | T && F | ||
| 48 | 104 | F && _ | ||
| 0 | - | 105 | continue; | |
| 106 | } | |||
| 107 | ||||
| 108 | status = acpi_ns_lookup(NULL, init_val->name, init_val->type, | |||
| 109 | ACPI_IMODE_LOAD_PASS2, | |||
| 110 | ACPI_NS_NO_UPSEARCH, NULL, &new_node); | |||
| 111 | ||||
| 0 | 54 | - | 112 | if (ACPI_FAILURE(status) || (!new_node)) { /* Must be on same line for code converter */ |
| 0 | - | 112 | (T) || (_) | |
| 0 | - | 112 | (F) || (T) | |
| 54 | 112 | (F) || (F) | ||
| 113 | ACPI_EXCEPTION((AE_INFO, status, | |||
| 114 | "Could not create predefined name %s", | |||
| 115 | init_val->name)); | |||
| 116 | } | |||
| 117 | ||||
| 118 | /* | |||
| 119 | * Name entered successfully. | |||
| 120 | * If entry in pre_defined_names[] specifies an | |||
| 121 | * initial value, create the initial value. | |||
| 122 | */ | |||
| 24 | 30 | 123 | if (init_val->val) { | |
| 124 | status = acpi_os_predefined_override(init_val, &val); | |||
| 0 | 24 | - | 125 | if (ACPI_FAILURE(status)) { |
| 126 | ACPI_ERROR((AE_INFO, | |||
| 127 | "Could not override predefined %s", | |||
| 128 | init_val->name)); | |||
| 129 | } | |||
| 130 | ||||
| 24 | 0 | - | 131 | if (!val) { |
| 132 | val = init_val->val; | |||
| 133 | } | |||
| 134 | ||||
| 135 | /* | |||
| 136 | * Entry requests an initial value, allocate a | |||
| 137 | * descriptor for it. | |||
| 138 | */ | |||
| 139 | obj_desc = | |||
| 140 | acpi_ut_create_internal_object(init_val->type); | |||
| 0 | 24 | - | 141 | if (!obj_desc) { |
| 142 | status = AE_NO_MEMORY; | |||
| 0 | - | 143 | goto unlock_and_exit; | |
| 144 | } | |||
| 145 | ||||
| 146 | /* | |||
| 147 | * Convert value string from table entry to | |||
| 148 | * internal representation. Only types actually | |||
| 149 | * used for initial values are implemented here. | |||
| 150 | */ | |||
| 151 | switch (init_val->type) { | |||
| 6 | 152 | case ACPI_TYPE_METHOD: | ||
| 153 | obj_desc->method.param_count = | |||
| 154 | (u8) ACPI_TO_INTEGER(val); | |||
| 155 | obj_desc->common.flags |= AOPOBJ_DATA_VALID; | |||
| 156 | ||||
| 157 | #if defined (ACPI_ASL_COMPILER) | |||
| 158 | ||||
| 159 | /* save the parameter count for the i_aSL compiler */ | |||
| 160 | ||||
| 161 | new_node->value = obj_desc->method.param_count; | |||
| 162 | #else | |||
| 163 | /* Mark this as a very SPECIAL method */ | |||
| 164 | ||||
| 165 | obj_desc->method.method_flags = | |||
| 166 | AML_METHOD_INTERNAL_ONLY; | |||
| 167 | ||||
| 168 | #ifndef ACPI_DUMP_APP | |||
| 169 | obj_desc->method.implementation = | |||
| 170 | acpi_ut_osi_implementation; | |||
| 171 | #endif | |||
| 172 | #endif | |||
| 6 | 173 | break; | ||
| 174 | ||||
| 6 | 175 | case ACPI_TYPE_INTEGER: | ||
| 176 | ||||
| 177 | obj_desc->integer.value = ACPI_TO_INTEGER(val); | |||
| 6 | 178 | break; | ||
| 179 | ||||
| 6 | 180 | case ACPI_TYPE_STRING: | ||
| 181 | ||||
| 182 | /* | |||
| 183 | * Build an object around the static string | |||
| 184 | */ | |||
| 185 | obj_desc->string.length = | |||
| 186 | (u32) ACPI_STRLEN(val); | |||
| 187 | obj_desc->string.pointer = val; | |||
| 188 | obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; | |||
| 6 | 189 | break; | ||
| 190 | ||||
| 6 | 191 | case ACPI_TYPE_MUTEX: | ||
| 192 | ||||
| 193 | obj_desc->mutex.node = new_node; | |||
| 194 | obj_desc->mutex.sync_level = | |||
| 195 | (u8) (ACPI_TO_INTEGER(val) - 1); | |||
| 196 | ||||
| 6 | 0 | - | 197 | if (ACPI_STRCMP(init_val->name, "_GL_") == 0) { |
| 198 | /* | |||
| 199 | * Create a counting semaphore for the | |||
| 200 | * global lock | |||
| 201 | */ | |||
| 202 | status = | |||
| 203 | acpi_os_create_semaphore | |||
| 204 | (ACPI_NO_UNIT_LIMIT, 1, | |||
| 205 | &obj_desc->mutex.semaphore); | |||
| 0 | 6 | - | 206 | if (ACPI_FAILURE(status)) { |
| 207 | acpi_ut_remove_reference | |||
| 208 | (obj_desc); | |||
| 0 | - | 209 | goto unlock_and_exit; | |
| 210 | } | |||
| 211 | ||||
| 212 | /* | |||
| 213 | * We just created the mutex for the | |||
| 214 | * global lock, save it | |||
| 215 | */ | |||
| 216 | acpi_gbl_global_lock_semaphore = | |||
| 217 | obj_desc->mutex.semaphore; | |||
| 218 | } else { | |||
| 219 | /* Create a mutex */ | |||
| 220 | ||||
| 221 | status = acpi_os_create_semaphore(1, 1, | |||
| 222 | &obj_desc-> | |||
| 223 | mutex. | |||
| 224 | semaphore); | |||
| 0 | 0 | - | 225 | if (ACPI_FAILURE(status)) { |
| 226 | acpi_ut_remove_reference | |||
| 227 | (obj_desc); | |||
| 0 | - | 228 | goto unlock_and_exit; | |
| 229 | } | |||
| 230 | } | |||
| 6 | 231 | break; | ||
| 232 | ||||
| 0 | - | 233 | default: | |
| 234 | ||||
| 235 | ACPI_ERROR((AE_INFO, | |||
| 236 | "Unsupported initial type value %X", | |||
| 237 | init_val->type)); | |||
| 238 | acpi_ut_remove_reference(obj_desc); | |||
| 239 | obj_desc = NULL; | |||
| 0 | - | 240 | continue; | |
| 241 | } | |||
| 242 | ||||
| 243 | /* Store pointer to value descriptor in the Node */ | |||
| 244 | ||||
| 245 | status = acpi_ns_attach_object(new_node, obj_desc, | |||
| 246 | ACPI_GET_OBJECT_TYPE | |||
| 247 | (obj_desc)); | |||
| 248 | ||||
| 249 | /* Remove local reference to the object */ | |||
| 250 | ||||
| 251 | acpi_ut_remove_reference(obj_desc); | |||
| 252 | } | |||
| 253 | } | |||
| 254 | ||||
| 255 | unlock_and_exit: | |||
| 256 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |||
| 257 | ||||
| 258 | /* Save a handle to "_GPE", it is always present */ | |||
| 259 | ||||
| 6 | 0 | - | 260 | if (ACPI_SUCCESS(status)) { |
| 261 | status = | |||
| 262 | acpi_ns_get_node_by_path("\\_GPE", NULL, | |||
| 263 | ACPI_NS_NO_UPSEARCH, | |||
| 264 | &acpi_gbl_fadt_gpe_device); | |||
| 265 | } | |||
| 266 | ||||
| 6 | 267 | return_ACPI_STATUS(status); | ||
| 268 | } | |||
| 269 | ||||
| 270 | /******************************************************************************* | |||
| 271 | * | |||
| 272 | * FUNCTION: acpi_ns_lookup | |||
| 273 | * | |||
| 274 | * PARAMETERS: scope_info - Current scope info block | |||
| 275 | * Pathname - Search pathname, in internal format | |||
| 276 | * (as represented in the AML stream) | |||
| 277 | * Type - Type associated with name | |||
| 278 | * interpreter_mode - IMODE_LOAD_PASS2 => add name if not found | |||
| 279 | * Flags - Flags describing the search restrictions | |||
| 280 | * walk_state - Current state of the walk | |||
| 281 | * return_node - Where the Node is placed (if found | |||
| 282 | * or created successfully) | |||
| 283 | * | |||
| 284 | * RETURN: Status | |||
| 285 | * | |||
| 286 | * DESCRIPTION: Find or enter the passed name in the name space. | |||
| 287 | * Log an error if name not found in Exec mode. | |||
| 288 | * | |||
| 289 | * MUTEX: Assumes namespace is locked. | |||
| 290 | * | |||
| 291 | ******************************************************************************/ | |||
| 292 | ||||
| 293 | acpi_status | |||
| 960285 | 0 | 294 | acpi_ns_lookup(union acpi_generic_state *scope_info, | |
| 295 | char *pathname, | |||
| 296 | acpi_object_type type, | |||
| 297 | acpi_interpreter_mode interpreter_mode, | |||
| 298 | u32 flags, | |||
| 299 | struct acpi_walk_state *walk_state, | |||
| 300 | struct acpi_namespace_node **return_node) | |||
| 301 | { | |||
| 302 | acpi_status status; | |||
| 303 | char *path = pathname; | |||
| 304 | struct acpi_namespace_node *prefix_node; | |||
| 305 | struct acpi_namespace_node *current_node = NULL; | |||
| 306 | struct acpi_namespace_node *this_node = NULL; | |||
| 307 | u32 num_segments; | |||
| 308 | u32 num_carats; | |||
| 309 | acpi_name simple_name; | |||
| 310 | acpi_object_type type_to_check_for; | |||
| 311 | acpi_object_type this_search_type; | |||
| 312 | u32 search_parent_flag = ACPI_NS_SEARCH_PARENT; | |||
| 313 | u32 local_flags = flags & ~(ACPI_NS_ERROR_IF_FOUND | | |||
| 314 | ACPI_NS_SEARCH_PARENT); | |||
| 315 | ||||
| 316 | ACPI_FUNCTION_TRACE("ns_lookup"); | |||
| 317 | ||||
| 0 | 960285 | - | 318 | if (!return_node) { |
| 0 | - | 319 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
| 320 | } | |||
| 321 | ||||
| 322 | acpi_gbl_ns_lookup_count++; | |||
| 323 | *return_node = ACPI_ENTRY_NOT_FOUND; | |||
| 324 | ||||
| 0 | 960285 | - | 325 | if (!acpi_gbl_root_node) { |
| 0 | - | 326 | return_ACPI_STATUS(AE_NO_NAMESPACE); | |
| 327 | } | |||
| 328 | ||||
| 329 | /* | |||
| 330 | * Get the prefix scope. | |||
| 331 | * A null scope means use the root scope | |||
| 332 | */ | |||
| 492 | 959793 | 333 | if ((!scope_info) || (!scope_info->scope.node)) { | |
| 396 | 333 | (T) || (_) | ||
| 96 | 333 | (F) || (T) | ||
| 959793 | 333 | (F) || (F) | ||
| 334 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 335 | "Null scope prefix, using root node (%p)\n", | |||
| 336 | acpi_gbl_root_node)); | |||
| 337 | ||||
| 338 | prefix_node = acpi_gbl_root_node; | |||
| 339 | } else { | |||
| 340 | prefix_node = scope_info->scope.node; | |||
| 341 | if (ACPI_GET_DESCRIPTOR_TYPE(prefix_node) != | |||
| 0 | 959793 | - | 342 | ACPI_DESC_TYPE_NAMED) { |
| 343 | ACPI_ERROR((AE_INFO, "%p is not a namespace node [%s]", | |||
| 344 | prefix_node, | |||
| 345 | acpi_ut_get_descriptor_name(prefix_node))); | |||
| 0 | - | 346 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
| 347 | } | |||
| 348 | ||||
| 349 | /* | |||
| 350 | * This node might not be a actual "scope" node (such as a | |||
| 351 | * Device/Method, etc.) It could be a Package or other object node. | |||
| 352 | * Backup up the tree to find the containing scope node. | |||
| 353 | */ | |||
| 354 | while (!acpi_ns_opens_scope(prefix_node->type) && | |||
| 630 | 959793 | 355 | prefix_node->type != ACPI_TYPE_ANY) { | |
| 630 | 355 | T && T | ||
| 0 | - | 355 | T && F | |
| 959793 | 355 | F && _ | ||
| 356 | prefix_node = acpi_ns_get_parent_node(prefix_node); | |||
| 357 | } | |||
| 358 | } | |||
| 359 | ||||
| 360 | /* Save type TBD: may be no longer necessary */ | |||
| 361 | ||||
| 362 | type_to_check_for = type; | |||
| 363 | ||||
| 364 | /* | |||
| 365 | * Begin examination of the actual pathname | |||
| 366 | */ | |||
| 0 | 960285 | - | 367 | if (!pathname) { |
| 368 | /* A Null name_path is allowed and refers to the root */ | |||
| 369 | ||||
| 370 | num_segments = 0; | |||
| 371 | this_node = acpi_gbl_root_node; | |||
| 372 | path = ""; | |||
| 373 | ||||
| 374 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 375 | "Null Pathname (Zero segments), Flags=%X\n", | |||
| 376 | flags)); | |||
| 377 | } else { | |||
| 378 | /* | |||
| 379 | * Name pointer is valid (and must be in internal name format) | |||
| 380 | * | |||
| 381 | * Check for scope prefixes: | |||
| 382 | * | |||
| 383 | * As represented in the AML stream, a namepath consists of an | |||
| 384 | * optional scope prefix followed by a name segment part. | |||
| 385 | * | |||
| 386 | * If present, the scope prefix is either a Root Prefix (in | |||
| 387 | * which case the name is fully qualified), or one or more | |||
| 388 | * Parent Prefixes (in which case the name's scope is relative | |||
| 389 | * to the current scope). | |||
| 390 | */ | |||
| 128672 | 831613 | 391 | if (*path == (u8) AML_ROOT_PREFIX) { | |
| 392 | /* Pathname is fully qualified, start from the root */ | |||
| 393 | ||||
| 394 | this_node = acpi_gbl_root_node; | |||
| 395 | search_parent_flag = ACPI_NS_NO_UPSEARCH; | |||
| 396 | ||||
| 397 | /* Point to name segment part */ | |||
| 398 | ||||
| 399 | path++; | |||
| 400 | ||||
| 401 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 402 | "Path is absolute from root [%p]\n", | |||
| 403 | this_node)); | |||
| 404 | } else { | |||
| 405 | /* Pathname is relative to current scope, start there */ | |||
| 406 | ||||
| 407 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 408 | "Searching relative to prefix scope [%4.4s] (%p)\n", | |||
| 409 | acpi_ut_get_node_name(prefix_node), | |||
| 410 | prefix_node)); | |||
| 411 | ||||
| 412 | /* | |||
| 413 | * Handle multiple Parent Prefixes (carat) by just getting | |||
| 414 | * the parent node for each prefix instance. | |||
| 415 | */ | |||
| 416 | this_node = prefix_node; | |||
| 417 | num_carats = 0; | |||
| 270 | 831613 | 418 | while (*path == (u8) AML_PARENT_PREFIX) { | |
| 419 | /* Name is fully qualified, no search rules apply */ | |||
| 420 | ||||
| 421 | search_parent_flag = ACPI_NS_NO_UPSEARCH; | |||
| 422 | /* | |||
| 423 | * Point past this prefix to the name segment | |||
| 424 | * part or the next Parent Prefix | |||
| 425 | */ | |||
| 426 | path++; | |||
| 427 | ||||
| 428 | /* Backup to the parent node */ | |||
| 429 | ||||
| 430 | num_carats++; | |||
| 431 | this_node = acpi_ns_get_parent_node(this_node); | |||
| 0 | 270 | - | 432 | if (!this_node) { |
| 433 | /* Current scope has no parent scope */ | |||
| 434 | ||||
| 435 | ACPI_ERROR((AE_INFO, | |||
| 436 | "ACPI path has too many parent prefixes (^) - reached beyond root node")); | |||
| 0 | - | 437 | return_ACPI_STATUS(AE_NOT_FOUND); | |
| 438 | } | |||
| 439 | } | |||
| 440 | ||||
| 270 | 831343 | 441 | if (search_parent_flag == ACPI_NS_NO_UPSEARCH) { | |
| 442 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 443 | "Search scope is [%4.4s], path has %d carat(s)\n", | |||
| 444 | acpi_ut_get_node_name | |||
| 445 | (this_node), num_carats)); | |||
| 446 | } | |||
| 447 | } | |||
| 448 | ||||
| 449 | /* | |||
| 450 | * Determine the number of ACPI name segments in this pathname. | |||
| 451 | * | |||
| 452 | * The segment part consists of either: | |||
| 453 | * - A Null name segment (0) | |||
| 454 | * - A dual_name_prefix followed by two 4-byte name segments | |||
| 455 | * - A multi_name_prefix followed by a byte indicating the | |||
| 456 | * number of segments and the segments themselves. | |||
| 457 | * - A single 4-byte name segment | |||
| 458 | * | |||
| 459 | * Examine the name prefix opcode, if any, to determine the number of | |||
| 460 | * segments. | |||
| 461 | */ | |||
| 462 | switch (*path) { | |||
| 0 | - | 463 | case 0: | |
| 464 | /* | |||
| 465 | * Null name after a root or parent prefixes. We already | |||
| 466 | * have the correct target node and there are no name segments. | |||
| 467 | */ | |||
| 468 | num_segments = 0; | |||
| 469 | type = this_node->type; | |||
| 470 | ||||
| 471 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 472 | "Prefix-only Pathname (Zero name segments), Flags=%X\n", | |||
| 473 | flags)); | |||
| 0 | - | 474 | break; | |
| 475 | ||||
| 32496 | 476 | case AML_DUAL_NAME_PREFIX: | ||
| 477 | ||||
| 478 | /* More than one name_seg, search rules do not apply */ | |||
| 479 | ||||
| 480 | search_parent_flag = ACPI_NS_NO_UPSEARCH; | |||
| 481 | ||||
| 482 | /* Two segments, point to first name segment */ | |||
| 483 | ||||
| 484 | num_segments = 2; | |||
| 485 | path++; | |||
| 486 | ||||
| 487 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 488 | "Dual Pathname (2 segments, Flags=%X)\n", | |||
| 489 | flags)); | |||
| 32496 | 490 | break; | ||
| 491 | ||||
| 95960 | 492 | case AML_MULTI_NAME_PREFIX_OP: | ||
| 493 | ||||
| 494 | /* More than one name_seg, search rules do not apply */ | |||
| 495 | ||||
| 496 | search_parent_flag = ACPI_NS_NO_UPSEARCH; | |||
| 497 | ||||
| 498 | /* Extract segment count, point to first name segment */ | |||
| 499 | ||||
| 500 | path++; | |||
| 501 | num_segments = (u32) (u8) * path; | |||
| 502 | path++; | |||
| 503 | ||||
| 504 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, | |||
| 505 | "Multi Pathname (%d Segments, Flags=%X)\n", | |||
| 506 | num_segments, flags)); | |||
| 95960 | 507 | break; | ||
| 508 | ||||
| 831829 | 509 | default: | ||
| 510 | /* | |||
| 511 | * Not a Null name, no Dual or Multi prefix, hence there is | |||
| 512 | * only one name segment and Pathname is already pointing to it. | |||
| 513 | */ | |||
| 514 | num_segments = 1; | |||
| 515 | ||||
| 516 | ||||