drivers/acpi/acpica/utglobal.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utglobal - Global variables for the ACPI subsystem
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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 #define DEFINE_ACPI_GLOBALS
  45
  46 #include <acpi/acpi.h>
  47 #include "accommon.h"
  48 #include "acnamesp.h"
  49
  50 #define _COMPONENT          ACPI_UTILITIES
  51 ACPI_MODULE_NAME("utglobal")
  52
  53 /*******************************************************************************
  54  *
  55  * Static global variable initialization.
  56  *
  57  ******************************************************************************/
  58 /*
  59  * We want the debug switches statically initialized so they
  60  * are already set when the debugger is entered.
  61  */
  62 /* Debug switch - level and trace mask */
  63 u32 acpi_dbg_level = ACPI_DEBUG_DEFAULT;
  64
  65 /* Debug switch - layer (component) mask */
  66
  67 u32 acpi_dbg_layer = 0;
  68 u32 acpi_gbl_nesting_level = 0;
  69
  70 /* Debugger globals */
  71
  72 u8 acpi_gbl_db_terminate_threads = FALSE;
  73 u8 acpi_gbl_abort_method = FALSE;
  74 u8 acpi_gbl_method_executing = FALSE;
  75
  76 /* System flags */
  77
  78 u32 acpi_gbl_startup_flags = 0;
  79
  80 /* System starts uninitialized */
  81
  82 u8 acpi_gbl_shutdown = TRUE;
  83
  84 const char *acpi_gbl_sleep_state_names[ACPI_S_STATE_COUNT] = {
  85         "\\_S0_",
  86         "\\_S1_",
  87         "\\_S2_",
  88         "\\_S3_",
  89         "\\_S4_",
  90         "\\_S5_"
  91 };
  92
  93 const char *acpi_gbl_highest_dstate_names[4] = {
  94         "_S1D",
  95         "_S2D",
  96         "_S3D",
  97         "_S4D"
  98 };
  99
 100 /*******************************************************************************
 101  *
 102  * FUNCTION:    acpi_format_exception
 103  *
 104  * PARAMETERS:  Status       - The acpi_status code to be formatted
 105  *
 106  * RETURN:      A string containing the exception text. A valid pointer is
 107  *              always returned.
 108  *
 109  * DESCRIPTION: This function translates an ACPI exception into an ASCII string
 110  *              It is here instead of utxface.c so it is always present.
 111  *
 112  ******************************************************************************/
 113
 114 const char *acpi_format_exception(acpi_status status)
 115 {
 116         const char *exception = NULL;
 117
 118         ACPI_FUNCTION_ENTRY();
 119
 120         exception = acpi_ut_validate_exception(status);
 121         if (!exception) {
 122
 123                 /* Exception code was not recognized */
 124
 125                 ACPI_ERROR((AE_INFO,
 126                             "Unknown exception code: 0x%8.8X", status));
 127
 128                 exception = "UNKNOWN_STATUS_CODE";
 129                 dump_stack();
 130         }
 131
 132         return (ACPI_CAST_PTR(const char, exception));
 133 }
 134
 135 ACPI_EXPORT_SYMBOL(acpi_format_exception)
 136
 137 /*******************************************************************************
 138  *
 139  * Namespace globals
 140  *
 141  ******************************************************************************/
 142 /*
 143  * Predefined ACPI Names (Built-in to the Interpreter)
 144  *
 145  * NOTES:
 146  * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
 147  *    during the initialization sequence.
 148  * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
 149  *    perform a Notify() operation on it.
 150  */
 151 const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
 152         {"_GPE", ACPI_TYPE_LOCAL_SCOPE, NULL},
 153         {"_PR_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 154         {"_SB_", ACPI_TYPE_DEVICE, NULL},
 155         {"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 156         {"_TZ_", ACPI_TYPE_THERMAL, NULL},
 157         {"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
 158         {"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
 159         {"_GL_", ACPI_TYPE_MUTEX, (char *)1},
 160
 161 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
 162         {"_OSI", ACPI_TYPE_METHOD, (char *)1},
 163 #endif
 164
 165         /* Table terminator */
 166
 167         {NULL, ACPI_TYPE_ANY, NULL}
 168 };
 169
 170 /*
 171  * Properties of the ACPI Object Types, both internal and external.
 172  * The table is indexed by values of acpi_object_type
 173  */
 174 const u8 acpi_gbl_ns_properties[] = {
 175         ACPI_NS_NORMAL,         /* 00 Any              */
 176         ACPI_NS_NORMAL,         /* 01 Number           */
 177         ACPI_NS_NORMAL,         /* 02 String           */
 178         ACPI_NS_NORMAL,         /* 03 Buffer           */
 179         ACPI_NS_NORMAL,         /* 04 Package          */
 180         ACPI_NS_NORMAL,         /* 05 field_unit       */
 181         ACPI_NS_NEWSCOPE,       /* 06 Device           */
 182         ACPI_NS_NORMAL,         /* 07 Event            */
 183         ACPI_NS_NEWSCOPE,       /* 08 Method           */
 184         ACPI_NS_NORMAL,         /* 09 Mutex            */
 185         ACPI_NS_NORMAL,         /* 10 Region           */
 186         ACPI_NS_NEWSCOPE,       /* 11 Power            */
 187         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
 188         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
 189         ACPI_NS_NORMAL,         /* 14 buffer_field     */
 190         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
 191         ACPI_NS_NORMAL,         /* 16 Debug Object     */
 192         ACPI_NS_NORMAL,         /* 17 def_field        */
 193         ACPI_NS_NORMAL,         /* 18 bank_field       */
 194         ACPI_NS_NORMAL,         /* 19 index_field      */
 195         ACPI_NS_NORMAL,         /* 20 Reference        */
 196         ACPI_NS_NORMAL,         /* 21 Alias            */
 197         ACPI_NS_NORMAL,         /* 22 method_alias     */
 198         ACPI_NS_NORMAL,         /* 23 Notify           */
 199         ACPI_NS_NORMAL,         /* 24 Address Handler  */
 200         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
 201         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
 202         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
 203         ACPI_NS_NORMAL,         /* 28 Extra            */
 204         ACPI_NS_NORMAL,         /* 29 Data             */
 205         ACPI_NS_NORMAL          /* 30 Invalid          */
 206 };
 207
 208 /* Hex to ASCII conversion table */
 209
 210 static const char acpi_gbl_hex_to_ascii[] = {
 211         '0', '1', '2', '3', '4', '5', '6', '7',
 212         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
 213 };
 214
 215 /*******************************************************************************
 216  *
 217  * FUNCTION:    acpi_ut_hex_to_ascii_char
 218  *
 219  * PARAMETERS:  Integer             - Contains the hex digit
 220  *              Position            - bit position of the digit within the
 221  *                                    integer (multiple of 4)
 222  *
 223  * RETURN:      The converted Ascii character
 224  *
 225  * DESCRIPTION: Convert a hex digit to an Ascii character
 226  *
 227  ******************************************************************************/
 228
 229 char acpi_ut_hex_to_ascii_char(acpi_integer integer, u32 position)
 230 {
 231
 232         return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
 233 }
 234
 235 /******************************************************************************
 236  *
 237  * Event and Hardware globals
 238  *
 239  ******************************************************************************/
 240
 241 struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
 242         /* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */
 243
 244         /* ACPI_BITREG_TIMER_STATUS         */ {ACPI_REGISTER_PM1_STATUS,
 245                                                 ACPI_BITPOSITION_TIMER_STATUS,
 246                                                 ACPI_BITMASK_TIMER_STATUS},
 247         /* ACPI_BITREG_BUS_MASTER_STATUS    */ {ACPI_REGISTER_PM1_STATUS,
 248                                                 ACPI_BITPOSITION_BUS_MASTER_STATUS,
 249                                                 ACPI_BITMASK_BUS_MASTER_STATUS},
 250         /* ACPI_BITREG_GLOBAL_LOCK_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 251                                                 ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,
 252                                                 ACPI_BITMASK_GLOBAL_LOCK_STATUS},
 253         /* ACPI_BITREG_POWER_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 254                                                 ACPI_BITPOSITION_POWER_BUTTON_STATUS,
 255                                                 ACPI_BITMASK_POWER_BUTTON_STATUS},
 256         /* ACPI_BITREG_SLEEP_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 257                                                 ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,
 258                                                 ACPI_BITMASK_SLEEP_BUTTON_STATUS},
 259         /* ACPI_BITREG_RT_CLOCK_STATUS      */ {ACPI_REGISTER_PM1_STATUS,
 260                                                 ACPI_BITPOSITION_RT_CLOCK_STATUS,
 261                                                 ACPI_BITMASK_RT_CLOCK_STATUS},
 262         /* ACPI_BITREG_WAKE_STATUS          */ {ACPI_REGISTER_PM1_STATUS,
 263                                                 ACPI_BITPOSITION_WAKE_STATUS,
 264                                                 ACPI_BITMASK_WAKE_STATUS},
 265         /* ACPI_BITREG_PCIEXP_WAKE_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 266                                                 ACPI_BITPOSITION_PCIEXP_WAKE_STATUS,
 267                                                 ACPI_BITMASK_PCIEXP_WAKE_STATUS},
 268
 269         /* ACPI_BITREG_TIMER_ENABLE         */ {ACPI_REGISTER_PM1_ENABLE,
 270                                                 ACPI_BITPOSITION_TIMER_ENABLE,
 271                                                 ACPI_BITMASK_TIMER_ENABLE},
 272         /* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */ {ACPI_REGISTER_PM1_ENABLE,
 273                                                 ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,
 274                                                 ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 275         /* ACPI_BITREG_POWER_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 276                                                 ACPI_BITPOSITION_POWER_BUTTON_ENABLE,
 277                                                 ACPI_BITMASK_POWER_BUTTON_ENABLE},
 278         /* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 279                                                 ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,
 280                                                 ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 281         /* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
 282                                                 ACPI_BITPOSITION_RT_CLOCK_ENABLE,
 283                                                 ACPI_BITMASK_RT_CLOCK_ENABLE},
 284         /* ACPI_BITREG_PCIEXP_WAKE_DISABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 285                                                 ACPI_BITPOSITION_PCIEXP_WAKE_DISABLE,
 286                                                 ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
 287
 288         /* ACPI_BITREG_SCI_ENABLE           */ {ACPI_REGISTER_PM1_CONTROL,
 289                                                 ACPI_BITPOSITION_SCI_ENABLE,
 290                                                 ACPI_BITMASK_SCI_ENABLE},
 291         /* ACPI_BITREG_BUS_MASTER_RLD       */ {ACPI_REGISTER_PM1_CONTROL,
 292                                                 ACPI_BITPOSITION_BUS_MASTER_RLD,
 293                                                 ACPI_BITMASK_BUS_MASTER_RLD},
 294         /* ACPI_BITREG_GLOBAL_LOCK_RELEASE  */ {ACPI_REGISTER_PM1_CONTROL,
 295                                                 ACPI_BITPOSITION_GLOBAL_LOCK_RELEASE,
 296                                                 ACPI_BITMASK_GLOBAL_LOCK_RELEASE},
 297         /* ACPI_BITREG_SLEEP_TYPE           */ {ACPI_REGISTER_PM1_CONTROL,
 298                                                 ACPI_BITPOSITION_SLEEP_TYPE,
 299                                                 ACPI_BITMASK_SLEEP_TYPE},
 300         /* ACPI_BITREG_SLEEP_ENABLE         */ {ACPI_REGISTER_PM1_CONTROL,
 301                                                 ACPI_BITPOSITION_SLEEP_ENABLE,
 302                                                 ACPI_BITMASK_SLEEP_ENABLE},
 303
 304         /* ACPI_BITREG_ARB_DIS              */ {ACPI_REGISTER_PM2_CONTROL,
 305                                                 ACPI_BITPOSITION_ARB_DISABLE,
 306                                                 ACPI_BITMASK_ARB_DISABLE}
 307 };
 308
 309 struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] = {
 310         /* ACPI_EVENT_PMTIMER       */ {ACPI_BITREG_TIMER_STATUS,
 311                                         ACPI_BITREG_TIMER_ENABLE,
 312                                         ACPI_BITMASK_TIMER_STATUS,
 313                                         ACPI_BITMASK_TIMER_ENABLE},
 314         /* ACPI_EVENT_GLOBAL        */ {ACPI_BITREG_GLOBAL_LOCK_STATUS,
 315                                         ACPI_BITREG_GLOBAL_LOCK_ENABLE,
 316                                         ACPI_BITMASK_GLOBAL_LOCK_STATUS,
 317                                         ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 318         /* ACPI_EVENT_POWER_BUTTON  */ {ACPI_BITREG_POWER_BUTTON_STATUS,
 319                                         ACPI_BITREG_POWER_BUTTON_ENABLE,
 320                                         ACPI_BITMASK_POWER_BUTTON_STATUS,
 321                                         ACPI_BITMASK_POWER_BUTTON_ENABLE},
 322         /* ACPI_EVENT_SLEEP_BUTTON  */ {ACPI_BITREG_SLEEP_BUTTON_STATUS,
 323                                         ACPI_BITREG_SLEEP_BUTTON_ENABLE,
 324                                         ACPI_BITMASK_SLEEP_BUTTON_STATUS,
 325                                         ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 326         /* ACPI_EVENT_RTC           */ {ACPI_BITREG_RT_CLOCK_STATUS,
 327                                         ACPI_BITREG_RT_CLOCK_ENABLE,
 328                                         ACPI_BITMASK_RT_CLOCK_STATUS,
 329                                         ACPI_BITMASK_RT_CLOCK_ENABLE},
 330 };
 331
 332 /*******************************************************************************
 333  *
 334  * FUNCTION:    acpi_ut_get_region_name
 335  *
 336  * PARAMETERS:  None.
 337  *
 338  * RETURN:      Status
 339  *
 340  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 341  *
 342  ******************************************************************************/
 343
 344 /* Region type decoding */
 345
 346 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 347         "SystemMemory",
 348         "SystemIO",
 349         "PCI_Config",
 350         "EmbeddedControl",
 351         "SMBus",
 352         "SystemCMOS",
 353         "PCIBARTarget",
 354         "DataTable"
 355 };
 356
 357 char *acpi_ut_get_region_name(u8 space_id)
 358 {
 359
 360         if (space_id >= ACPI_USER_REGION_BEGIN) {
 361                 return ("UserDefinedRegion");
 362         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
 363                 return ("InvalidSpaceId");
 364         }
 365
 366         return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
 367 }
 368
 369 /*******************************************************************************
 370  *
 371  * FUNCTION:    acpi_ut_get_event_name
 372  *
 373  * PARAMETERS:  None.
 374  *
 375  * RETURN:      Status
 376  *
 377  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 378  *
 379  ******************************************************************************/
 380
 381 /* Event type decoding */
 382
 383 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 384         "PM_Timer",
 385         "GlobalLock",
 386         "PowerButton",
 387         "SleepButton",
 388         "RealTimeClock",
 389 };
 390
 391 char *acpi_ut_get_event_name(u32 event_id)
 392 {
 393
 394         if (event_id > ACPI_EVENT_MAX) {
 395                 return ("InvalidEventID");
 396         }
 397
 398         return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
 399 }
 400
 401 /*******************************************************************************
 402  *
 403  * FUNCTION:    acpi_ut_get_type_name
 404  *
 405  * PARAMETERS:  None.
 406  *
 407  * RETURN:      Status
 408  *
 409  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 410  *
 411  ******************************************************************************/
 412
 413 /*
 414  * Elements of acpi_gbl_ns_type_names below must match
 415  * one-to-one with values of acpi_object_type
 416  *
 417  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 418  * when stored in a table it really means that we have thus far seen no
 419  * evidence to indicate what type is actually going to be stored for this entry.
 420  */
 421 static const char acpi_gbl_bad_type[] = "UNDEFINED";
 422
 423 /* Printable names of the ACPI object types */
 424
 425 static const char *acpi_gbl_ns_type_names[] = {
 426         /* 00 */ "Untyped",
 427         /* 01 */ "Integer",
 428         /* 02 */ "String",
 429         /* 03 */ "Buffer",
 430         /* 04 */ "Package",
 431         /* 05 */ "FieldUnit",
 432         /* 06 */ "Device",
 433         /* 07 */ "Event",
 434         /* 08 */ "Method",
 435         /* 09 */ "Mutex",
 436         /* 10 */ "Region",
 437         /* 11 */ "Power",
 438         /* 12 */ "Processor",
 439         /* 13 */ "Thermal",
 440         /* 14 */ "BufferField",
 441         /* 15 */ "DdbHandle",
 442         /* 16 */ "DebugObject",
 443         /* 17 */ "RegionField",
 444         /* 18 */ "BankField",
 445         /* 19 */ "IndexField",
 446         /* 20 */ "Reference",
 447         /* 21 */ "Alias",
 448         /* 22 */ "MethodAlias",
 449         /* 23 */ "Notify",
 450         /* 24 */ "AddrHandler",
 451         /* 25 */ "ResourceDesc",
 452         /* 26 */ "ResourceFld",
 453         /* 27 */ "Scope",
 454         /* 28 */ "Extra",
 455         /* 29 */ "Data",
 456         /* 30 */ "Invalid"
 457 };
 458
 459 char *acpi_ut_get_type_name(acpi_object_type type)
 460 {
 461
 462         if (type > ACPI_TYPE_INVALID) {
 463                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 464         }
 465
 466         return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
 467 }
 468
 469 char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 470 {
 471
 472         if (!obj_desc) {
 473                 return ("[NULL Object Descriptor]");
 474         }
 475
 476         return (acpi_ut_get_type_name(obj_desc->common.type));
 477 }
 478
 479 /*******************************************************************************
 480  *
 481  * FUNCTION:    acpi_ut_get_node_name
 482  *
 483  * PARAMETERS:  Object               - A namespace node
 484  *
 485  * RETURN:      Pointer to a string
 486  *
 487  * DESCRIPTION: Validate the node and return the node's ACPI name.
 488  *
 489  ******************************************************************************/
 490
 491 char *acpi_ut_get_node_name(void *object)
 492 {
 493         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 494
 495         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
 496
 497         if (!object) {
 498                 return ("NULL");
 499         }
 500
 501         /* Check for Root node */
 502
 503         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
 504                 return ("\"\\\" ");
 505         }
 506
 507         /* Descriptor must be a namespace node */
 508
 509         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
 510                 return ("####");
 511         }
 512
 513         /* Name must be a valid ACPI name */
 514
 515         if (!acpi_ut_valid_acpi_name(node->name.integer)) {
 516                 node->name.integer = acpi_ut_repair_name(node->name.ascii);
 517         }
 518
 519         /* Return the name */
 520
 521         return (node->name.ascii);
 522 }
 523
 524 /*******************************************************************************
 525  *
 526  * FUNCTION:    acpi_ut_get_descriptor_name
 527  *
 528  * PARAMETERS:  Object               - An ACPI object
 529  *
 530  * RETURN:      Pointer to a string
 531  *
 532  * DESCRIPTION: Validate object and return the descriptor type
 533  *
 534  ******************************************************************************/
 535
 536 /* Printable names of object descriptor types */
 537
 538 static const char *acpi_gbl_desc_type_names[] = {
 539         /* 00 */ "Invalid",
 540         /* 01 */ "Cached",
 541         /* 02 */ "State-Generic",
 542         /* 03 */ "State-Update",
 543         /* 04 */ "State-Package",
 544         /* 05 */ "State-Control",
 545         /* 06 */ "State-RootParseScope",
 546         /* 07 */ "State-ParseScope",
 547         /* 08 */ "State-WalkScope",
 548         /* 09 */ "State-Result",
 549         /* 10 */ "State-Notify",
 550         /* 11 */ "State-Thread",
 551         /* 12 */ "Walk",
 552         /* 13 */ "Parser",
 553         /* 14 */ "Operand",
 554         /* 15 */ "Node"
 555 };
 556
 557 char *acpi_ut_get_descriptor_name(void *object)
 558 {
 559
 560         if (!object) {
 561                 return ("NULL OBJECT");
 562         }
 563
 564         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
 565                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 566         }
 567
 568         return (ACPI_CAST_PTR(char,
 569                               acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
 570                                                        (object)]));
 571
 572 }
 573
 574 /*******************************************************************************
 575  *
 576  * FUNCTION:    acpi_ut_get_reference_name
 577  *
 578  * PARAMETERS:  Object               - An ACPI reference object
 579  *
 580  * RETURN:      Pointer to a string
 581  *
 582  * DESCRIPTION: Decode a reference object sub-type to a string.
 583  *
 584  ******************************************************************************/
 585
 586 /* Printable names of reference object sub-types */
 587
 588 static const char *acpi_gbl_ref_class_names[] = {
 589         /* 00 */ "Local",
 590         /* 01 */ "Argument",
 591         /* 02 */ "RefOf",
 592         /* 03 */ "Index",
 593         /* 04 */ "DdbHandle",
 594         /* 05 */ "Named Object",
 595         /* 06 */ "Debug"
 596 };
 597
 598 const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
 599 {
 600         if (!object)
 601                 return "NULL Object";
 602
 603         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND)
 604                 return "Not an Operand object";
 605
 606         if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE)
 607                 return "Not a Reference object";
 608
 609         if (object->reference.class > ACPI_REFCLASS_MAX)
 610                 return "Unknown Reference class";
 611
 612         return acpi_gbl_ref_class_names[object->reference.class];
 613 }
 614
 615 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 616 /*
 617  * Strings and procedures used for debug only
 618  */
 619
 620 /*******************************************************************************
 621  *
 622  * FUNCTION:    acpi_ut_get_mutex_name
 623  *
 624  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 625  *
 626  * RETURN:      String containing the name of the mutex. Always returns a valid
 627  *              pointer.
 628  *
 629  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 630  *
 631  ******************************************************************************/
 632
 633 char *acpi_ut_get_mutex_name(u32 mutex_id)
 634 {
 635
 636         if (mutex_id > ACPI_MAX_MUTEX) {
 637                 return ("Invalid Mutex ID");
 638         }
 639
 640         return (acpi_gbl_mutex_names[mutex_id]);
 641 }
 642
 643 /*******************************************************************************
 644  *
 645  * FUNCTION:    acpi_ut_get_notify_name
 646  *
 647  * PARAMETERS:  notify_value    - Value from the Notify() request
 648  *
 649  * RETURN:      String corresponding to the Notify Value.
 650  *
 651  * DESCRIPTION: Translate a Notify Value to a notify namestring.
 652  *
 653  ******************************************************************************/
 654
 655 /* Names for Notify() values, used for debug output */
 656
 657 static const char *acpi_gbl_notify_value_names[] = {
 658         "Bus Check",
 659         "Device Check",
 660         "Device Wake",
 661         "Eject Request",
 662         "Device Check Light",
 663         "Frequency Mismatch",
 664         "Bus Mode Mismatch",
 665         "Power Fault",
 666         "Capabilities Check",
 667         "Device PLD Check",
 668         "Reserved",
 669         "System Locality Update"
 670 };
 671
 672 const char *acpi_ut_get_notify_name(u32 notify_value)
 673 {
 674
 675         if (notify_value <= ACPI_NOTIFY_MAX) {
 676                 return (acpi_gbl_notify_value_names[notify_value]);
 677         } else if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
 678                 return ("Reserved");
 679         } else {                /* Greater or equal to 0x80 */
 680
 681                 return ("**Device Specific**");
 682         }
 683 }
 684 #endif
 685
 686 /*******************************************************************************
 687  *
 688  * FUNCTION:    acpi_ut_valid_object_type
 689  *
 690  * PARAMETERS:  Type            - Object type to be validated
 691  *
 692  * RETURN:      TRUE if valid object type, FALSE otherwise
 693  *
 694  * DESCRIPTION: Validate an object type
 695  *
 696  ******************************************************************************/
 697
 698 u8 acpi_ut_valid_object_type(acpi_object_type type)
 699 {
 700
 701         if (type > ACPI_TYPE_LOCAL_MAX) {
 702
 703                 /* Note: Assumes all TYPEs are contiguous (external/local) */
 704
 705                 return (FALSE);
 706         }
 707
 708         return (TRUE);
 709 }
 710
 711 /*******************************************************************************
 712  *
 713  * FUNCTION:    acpi_ut_init_globals
 714  *
 715  * PARAMETERS:  None
 716  *
 717  * RETURN:      Status
 718  *
 719  * DESCRIPTION: Init library globals.  All globals that require specific
 720  *              initialization should be initialized here!
 721  *
 722  ******************************************************************************/
 723
 724 acpi_status acpi_ut_init_globals(void)
 725 {
 726         acpi_status status;
 727         u32 i;
 728
 729         ACPI_FUNCTION_TRACE(ut_init_globals);
 730
 731         /* Create all memory caches */
 732
 733         status = acpi_ut_create_caches();
 734         if (ACPI_FAILURE(status)) {
 735                 return_ACPI_STATUS(status);
 736         }
 737
 738         /* Mutex locked flags */
 739
 740         for (i = 0; i < ACPI_NUM_MUTEX; i++) {
 741                 acpi_gbl_mutex_info[i].mutex = NULL;
 742                 acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 743                 acpi_gbl_mutex_info[i].use_count = 0;
 744         }
 745
 746         for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
 747                 acpi_gbl_owner_id_mask[i] = 0;
 748         }
 749         acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;        /* Last ID is never valid */
 750
 751         /* GPE support */
 752
 753         acpi_gbl_gpe_xrupt_list_head = NULL;
 754         acpi_gbl_gpe_fadt_blocks[0] = NULL;
 755         acpi_gbl_gpe_fadt_blocks[1] = NULL;
 756         acpi_current_gpe_count = 0;
 757
 758         /* Global handlers */
 759
 760         acpi_gbl_system_notify.handler = NULL;
 761         acpi_gbl_device_notify.handler = NULL;
 762         acpi_gbl_exception_handler = NULL;
 763         acpi_gbl_init_handler = NULL;
 764         acpi_gbl_table_handler = NULL;
 765
 766         /* Global Lock support */
 767
 768         acpi_gbl_global_lock_semaphore = NULL;
 769         acpi_gbl_global_lock_mutex = NULL;
 770         acpi_gbl_global_lock_acquired = FALSE;
 771         acpi_gbl_global_lock_handle = 0;
 772         acpi_gbl_global_lock_present = FALSE;
 773
 774         /* Miscellaneous variables */
 775
 776         acpi_gbl_cm_single_step = FALSE;
 777         acpi_gbl_db_terminate_threads = FALSE;
 778         acpi_gbl_shutdown = FALSE;
 779         acpi_gbl_ns_lookup_count = 0;
 780         acpi_gbl_ps_find_count = 0;
 781         acpi_gbl_acpi_hardware_present = TRUE;
 782         acpi_gbl_last_owner_id_index = 0;
 783         acpi_gbl_next_owner_id_offset = 0;
 784         acpi_gbl_trace_method_name = 0;
 785         acpi_gbl_trace_dbg_level = 0;
 786         acpi_gbl_trace_dbg_layer = 0;
 787         acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
 788         acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
 789
 790         /* Hardware oriented */
 791
 792         acpi_gbl_events_initialized = FALSE;
 793         acpi_gbl_system_awake_and_running = TRUE;
 794
 795         /* Namespace */
 796
 797         acpi_gbl_root_node = NULL;
 798         acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
 799         acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
 800         acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
 801         acpi_gbl_root_node_struct.child = NULL;
 802         acpi_gbl_root_node_struct.peer = NULL;
 803         acpi_gbl_root_node_struct.object = NULL;
 804         acpi_gbl_root_node_struct.flags = ANOBJ_END_OF_PEER_LIST;
 805
 806 #ifdef ACPI_DEBUG_OUTPUT
 807         acpi_gbl_lowest_stack_pointer = ACPI_CAST_PTR(acpi_size, ACPI_SIZE_MAX);
 808 #endif
 809
 810 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 811         acpi_gbl_display_final_mem_stats = FALSE;
 812 #endif
 813
 814         return_ACPI_STATUS(AE_OK);
 815 }
 816
 817 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
 818 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
 819 ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
 820 ACPI_EXPORT_SYMBOL(acpi_current_gpe_count)