err.no Git - linux-2.6/blob - drivers/acpi/utilities/utglobal.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utglobal - Global variables for the ACPI subsystem
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2007, 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 #define DEFINE_ACPI_GLOBALS
  45
  46 #include <acpi/acpi.h>
  47 #include <acpi/acnamesp.h>
  48
  49 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
  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 = ACPI_COMPONENT_DEFAULT | ACPI_ALL_DRIVERS;
  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         }
 130
 131         return (ACPI_CAST_PTR(const char, exception));
 132 }
 133
 134 ACPI_EXPORT_SYMBOL(acpi_format_exception)
 135
 136 /*******************************************************************************
 137  *
 138  * Namespace globals
 139  *
 140  ******************************************************************************/
 141 /*
 142  * Predefined ACPI Names (Built-in to the Interpreter)
 143  *
 144  * NOTES:
 145  * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
 146  *    during the initialization sequence.
 147  * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
 148  *    perform a Notify() operation on it.
 149  */
 150 const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
 151         {"_GPE", ACPI_TYPE_LOCAL_SCOPE, NULL},
 152         {"_PR_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 153         {"_SB_", ACPI_TYPE_DEVICE, NULL},
 154         {"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 155         {"_TZ_", ACPI_TYPE_THERMAL, NULL},
 156         {"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
 157         {"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
 158         {"_GL_", ACPI_TYPE_MUTEX, (char *)1},
 159
 160 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
 161         {"_OSI", ACPI_TYPE_METHOD, (char *)1},
 162 #endif
 163
 164         /* Table terminator */
 165
 166         {NULL, ACPI_TYPE_ANY, NULL}
 167 };
 168
 169 /*
 170  * Properties of the ACPI Object Types, both internal and external.
 171  * The table is indexed by values of acpi_object_type
 172  */
 173 const u8 acpi_gbl_ns_properties[] = {
 174         ACPI_NS_NORMAL,         /* 00 Any              */
 175         ACPI_NS_NORMAL,         /* 01 Number           */
 176         ACPI_NS_NORMAL,         /* 02 String           */
 177         ACPI_NS_NORMAL,         /* 03 Buffer           */
 178         ACPI_NS_NORMAL,         /* 04 Package          */
 179         ACPI_NS_NORMAL,         /* 05 field_unit       */
 180         ACPI_NS_NEWSCOPE,       /* 06 Device           */
 181         ACPI_NS_NORMAL,         /* 07 Event            */
 182         ACPI_NS_NEWSCOPE,       /* 08 Method           */
 183         ACPI_NS_NORMAL,         /* 09 Mutex            */
 184         ACPI_NS_NORMAL,         /* 10 Region           */
 185         ACPI_NS_NEWSCOPE,       /* 11 Power            */
 186         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
 187         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
 188         ACPI_NS_NORMAL,         /* 14 buffer_field     */
 189         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
 190         ACPI_NS_NORMAL,         /* 16 Debug Object     */
 191         ACPI_NS_NORMAL,         /* 17 def_field        */
 192         ACPI_NS_NORMAL,         /* 18 bank_field       */
 193         ACPI_NS_NORMAL,         /* 19 index_field      */
 194         ACPI_NS_NORMAL,         /* 20 Reference        */
 195         ACPI_NS_NORMAL,         /* 21 Alias            */
 196         ACPI_NS_NORMAL,         /* 22 method_alias     */
 197         ACPI_NS_NORMAL,         /* 23 Notify           */
 198         ACPI_NS_NORMAL,         /* 24 Address Handler  */
 199         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
 200         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
 201         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
 202         ACPI_NS_NORMAL,         /* 28 Extra            */
 203         ACPI_NS_NORMAL,         /* 29 Data             */
 204         ACPI_NS_NORMAL          /* 30 Invalid          */
 205 };
 206
 207 /* Hex to ASCII conversion table */
 208
 209 static const char acpi_gbl_hex_to_ascii[] = {
 210         '0', '1', '2', '3', '4', '5', '6', '7',
 211         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
 212 };
 213
 214 /*******************************************************************************
 215  *
 216  * FUNCTION:    acpi_ut_hex_to_ascii_char
 217  *
 218  * PARAMETERS:  Integer             - Contains the hex digit
 219  *              Position            - bit position of the digit within the
 220  *                                    integer (multiple of 4)
 221  *
 222  * RETURN:      The converted Ascii character
 223  *
 224  * DESCRIPTION: Convert a hex digit to an Ascii character
 225  *
 226  ******************************************************************************/
 227
 228 char acpi_ut_hex_to_ascii_char(acpi_integer integer, u32 position)
 229 {
 230
 231         return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
 232 }
 233
 234 /******************************************************************************
 235  *
 236  * Event and Hardware globals
 237  *
 238  ******************************************************************************/
 239
 240 struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
 241         /* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */
 242
 243         /* ACPI_BITREG_TIMER_STATUS         */ {ACPI_REGISTER_PM1_STATUS,
 244                                                 ACPI_BITPOSITION_TIMER_STATUS,
 245                                                 ACPI_BITMASK_TIMER_STATUS},
 246         /* ACPI_BITREG_BUS_MASTER_STATUS    */ {ACPI_REGISTER_PM1_STATUS,
 247                                                 ACPI_BITPOSITION_BUS_MASTER_STATUS,
 248                                                 ACPI_BITMASK_BUS_MASTER_STATUS},
 249         /* ACPI_BITREG_GLOBAL_LOCK_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 250                                                 ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,
 251                                                 ACPI_BITMASK_GLOBAL_LOCK_STATUS},
 252         /* ACPI_BITREG_POWER_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 253                                                 ACPI_BITPOSITION_POWER_BUTTON_STATUS,
 254                                                 ACPI_BITMASK_POWER_BUTTON_STATUS},
 255         /* ACPI_BITREG_SLEEP_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
 256                                                 ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,
 257                                                 ACPI_BITMASK_SLEEP_BUTTON_STATUS},
 258         /* ACPI_BITREG_RT_CLOCK_STATUS      */ {ACPI_REGISTER_PM1_STATUS,
 259                                                 ACPI_BITPOSITION_RT_CLOCK_STATUS,
 260                                                 ACPI_BITMASK_RT_CLOCK_STATUS},
 261         /* ACPI_BITREG_WAKE_STATUS          */ {ACPI_REGISTER_PM1_STATUS,
 262                                                 ACPI_BITPOSITION_WAKE_STATUS,
 263                                                 ACPI_BITMASK_WAKE_STATUS},
 264         /* ACPI_BITREG_PCIEXP_WAKE_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
 265                                                 ACPI_BITPOSITION_PCIEXP_WAKE_STATUS,
 266                                                 ACPI_BITMASK_PCIEXP_WAKE_STATUS},
 267
 268         /* ACPI_BITREG_TIMER_ENABLE         */ {ACPI_REGISTER_PM1_ENABLE,
 269                                                 ACPI_BITPOSITION_TIMER_ENABLE,
 270                                                 ACPI_BITMASK_TIMER_ENABLE},
 271         /* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */ {ACPI_REGISTER_PM1_ENABLE,
 272                                                 ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,
 273                                                 ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 274         /* ACPI_BITREG_POWER_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 275                                                 ACPI_BITPOSITION_POWER_BUTTON_ENABLE,
 276                                                 ACPI_BITMASK_POWER_BUTTON_ENABLE},
 277         /* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
 278                                                 ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,
 279                                                 ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 280         /* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
 281                                                 ACPI_BITPOSITION_RT_CLOCK_ENABLE,
 282                                                 ACPI_BITMASK_RT_CLOCK_ENABLE},
 283         /* ACPI_BITREG_WAKE_ENABLE          */ {ACPI_REGISTER_PM1_ENABLE, 0, 0},
 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_A         */ {ACPI_REGISTER_PM1_CONTROL,
 298                                                 ACPI_BITPOSITION_SLEEP_TYPE_X,
 299                                                 ACPI_BITMASK_SLEEP_TYPE_X},
 300         /* ACPI_BITREG_SLEEP_TYPE_B         */ {ACPI_REGISTER_PM1_CONTROL,
 301                                                 ACPI_BITPOSITION_SLEEP_TYPE_X,
 302                                                 ACPI_BITMASK_SLEEP_TYPE_X},
 303         /* ACPI_BITREG_SLEEP_ENABLE         */ {ACPI_REGISTER_PM1_CONTROL,
 304                                                 ACPI_BITPOSITION_SLEEP_ENABLE,
 305                                                 ACPI_BITMASK_SLEEP_ENABLE},
 306
 307         /* ACPI_BITREG_ARB_DIS              */ {ACPI_REGISTER_PM2_CONTROL,
 308                                                 ACPI_BITPOSITION_ARB_DISABLE,
 309                                                 ACPI_BITMASK_ARB_DISABLE}
 310 };
 311
 312 struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] = {
 313         /* ACPI_EVENT_PMTIMER       */ {ACPI_BITREG_TIMER_STATUS,
 314                                         ACPI_BITREG_TIMER_ENABLE,
 315                                         ACPI_BITMASK_TIMER_STATUS,
 316                                         ACPI_BITMASK_TIMER_ENABLE},
 317         /* ACPI_EVENT_GLOBAL        */ {ACPI_BITREG_GLOBAL_LOCK_STATUS,
 318                                         ACPI_BITREG_GLOBAL_LOCK_ENABLE,
 319                                         ACPI_BITMASK_GLOBAL_LOCK_STATUS,
 320                                         ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
 321         /* ACPI_EVENT_POWER_BUTTON  */ {ACPI_BITREG_POWER_BUTTON_STATUS,
 322                                         ACPI_BITREG_POWER_BUTTON_ENABLE,
 323                                         ACPI_BITMASK_POWER_BUTTON_STATUS,
 324                                         ACPI_BITMASK_POWER_BUTTON_ENABLE},
 325         /* ACPI_EVENT_SLEEP_BUTTON  */ {ACPI_BITREG_SLEEP_BUTTON_STATUS,
 326                                         ACPI_BITREG_SLEEP_BUTTON_ENABLE,
 327                                         ACPI_BITMASK_SLEEP_BUTTON_STATUS,
 328                                         ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
 329         /* ACPI_EVENT_RTC           */ {ACPI_BITREG_RT_CLOCK_STATUS,
 330                                         ACPI_BITREG_RT_CLOCK_ENABLE,
 331                                         ACPI_BITMASK_RT_CLOCK_STATUS,
 332                                         ACPI_BITMASK_RT_CLOCK_ENABLE},
 333 };
 334
 335 /*******************************************************************************
 336  *
 337  * FUNCTION:    acpi_ut_get_region_name
 338  *
 339  * PARAMETERS:  None.
 340  *
 341  * RETURN:      Status
 342  *
 343  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 344  *
 345  ******************************************************************************/
 346
 347 /* Region type decoding */
 348
 349 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 350         "SystemMemory",
 351         "SystemIO",
 352         "PCI_Config",
 353         "EmbeddedControl",
 354         "SMBus",
 355         "CMOS",
 356         "PCIBARTarget",
 357         "DataTable"
 358 };
 359
 360 char *acpi_ut_get_region_name(u8 space_id)
 361 {
 362
 363         if (space_id >= ACPI_USER_REGION_BEGIN) {
 364                 return ("UserDefinedRegion");
 365         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
 366                 return ("InvalidSpaceId");
 367         }
 368
 369         return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
 370 }
 371
 372 /*******************************************************************************
 373  *
 374  * FUNCTION:    acpi_ut_get_event_name
 375  *
 376  * PARAMETERS:  None.
 377  *
 378  * RETURN:      Status
 379  *
 380  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 381  *
 382  ******************************************************************************/
 383
 384 /* Event type decoding */
 385
 386 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 387         "PM_Timer",
 388         "GlobalLock",
 389         "PowerButton",
 390         "SleepButton",
 391         "RealTimeClock",
 392 };
 393
 394 char *acpi_ut_get_event_name(u32 event_id)
 395 {
 396
 397         if (event_id > ACPI_EVENT_MAX) {
 398                 return ("InvalidEventID");
 399         }
 400
 401         return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
 402 }
 403
 404 /*******************************************************************************
 405  *
 406  * FUNCTION:    acpi_ut_get_type_name
 407  *
 408  * PARAMETERS:  None.
 409  *
 410  * RETURN:      Status
 411  *
 412  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 413  *
 414  ******************************************************************************/
 415
 416 /*
 417  * Elements of acpi_gbl_ns_type_names below must match
 418  * one-to-one with values of acpi_object_type
 419  *
 420  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 421  * when stored in a table it really means that we have thus far seen no
 422  * evidence to indicate what type is actually going to be stored for this entry.
 423  */
 424 static const char acpi_gbl_bad_type[] = "UNDEFINED";
 425
 426 /* Printable names of the ACPI object types */
 427
 428 static const char *acpi_gbl_ns_type_names[] = {
 429         /* 00 */ "Untyped",
 430         /* 01 */ "Integer",
 431         /* 02 */ "String",
 432         /* 03 */ "Buffer",
 433         /* 04 */ "Package",
 434         /* 05 */ "FieldUnit",
 435         /* 06 */ "Device",
 436         /* 07 */ "Event",
 437         /* 08 */ "Method",
 438         /* 09 */ "Mutex",
 439         /* 10 */ "Region",
 440         /* 11 */ "Power",
 441         /* 12 */ "Processor",
 442         /* 13 */ "Thermal",
 443         /* 14 */ "BufferField",
 444         /* 15 */ "DdbHandle",
 445         /* 16 */ "DebugObject",
 446         /* 17 */ "RegionField",
 447         /* 18 */ "BankField",
 448         /* 19 */ "IndexField",
 449         /* 20 */ "Reference",
 450         /* 21 */ "Alias",
 451         /* 22 */ "MethodAlias",
 452         /* 23 */ "Notify",
 453         /* 24 */ "AddrHandler",
 454         /* 25 */ "ResourceDesc",
 455         /* 26 */ "ResourceFld",
 456         /* 27 */ "Scope",
 457         /* 28 */ "Extra",
 458         /* 29 */ "Data",
 459         /* 30 */ "Invalid"
 460 };
 461
 462 char *acpi_ut_get_type_name(acpi_object_type type)
 463 {
 464
 465         if (type > ACPI_TYPE_INVALID) {
 466                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 467         }
 468
 469         return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
 470 }
 471
 472 char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 473 {
 474
 475         if (!obj_desc) {
 476                 return ("[NULL Object Descriptor]");
 477         }
 478
 479         return (acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE(obj_desc)));
 480 }
 481
 482 /*******************************************************************************
 483  *
 484  * FUNCTION:    acpi_ut_get_node_name
 485  *
 486  * PARAMETERS:  Object               - A namespace node
 487  *
 488  * RETURN:      Pointer to a string
 489  *
 490  * DESCRIPTION: Validate the node and return the node's ACPI name.
 491  *
 492  ******************************************************************************/
 493
 494 char *acpi_ut_get_node_name(void *object)
 495 {
 496         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 497
 498         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
 499
 500         if (!object) {
 501                 return ("NULL");
 502         }
 503
 504         /* Check for Root node */
 505
 506         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
 507                 return ("\"\\\" ");
 508         }
 509
 510         /* Descriptor must be a namespace node */
 511
 512         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
 513                 return ("####");
 514         }
 515
 516         /* Name must be a valid ACPI name */
 517
 518         if (!acpi_ut_valid_acpi_name(node->name.integer)) {
 519                 node->name.integer = acpi_ut_repair_name(node->name.ascii);
 520         }
 521
 522         /* Return the name */
 523
 524         return (node->name.ascii);
 525 }
 526
 527 /*******************************************************************************
 528  *
 529  * FUNCTION:    acpi_ut_get_descriptor_name
 530  *
 531  * PARAMETERS:  Object               - An ACPI object
 532  *
 533  * RETURN:      Pointer to a string
 534  *
 535  * DESCRIPTION: Validate object and return the descriptor type
 536  *
 537  ******************************************************************************/
 538
 539 /* Printable names of object descriptor types */
 540
 541 static const char *acpi_gbl_desc_type_names[] = {
 542         /* 00 */ "Invalid",
 543         /* 01 */ "Cached",
 544         /* 02 */ "State-Generic",
 545         /* 03 */ "State-Update",
 546         /* 04 */ "State-Package",
 547         /* 05 */ "State-Control",
 548         /* 06 */ "State-RootParseScope",
 549         /* 07 */ "State-ParseScope",
 550         /* 08 */ "State-WalkScope",
 551         /* 09 */ "State-Result",
 552         /* 10 */ "State-Notify",
 553         /* 11 */ "State-Thread",
 554         /* 12 */ "Walk",
 555         /* 13 */ "Parser",
 556         /* 14 */ "Operand",
 557         /* 15 */ "Node"
 558 };
 559
 560 char *acpi_ut_get_descriptor_name(void *object)
 561 {
 562
 563         if (!object) {
 564                 return ("NULL OBJECT");
 565         }
 566
 567         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
 568                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 569         }
 570
 571         return (ACPI_CAST_PTR(char,
 572                               acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
 573                                                        (object)]));
 574
 575 }
 576
 577 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 578 /*
 579  * Strings and procedures used for debug only
 580  */
 581
 582 /*******************************************************************************
 583  *
 584  * FUNCTION:    acpi_ut_get_mutex_name
 585  *
 586  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 587  *
 588  * RETURN:      String containing the name of the mutex. Always returns a valid
 589  *              pointer.
 590  *
 591  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 592  *
 593  ******************************************************************************/
 594
 595 char *acpi_ut_get_mutex_name(u32 mutex_id)
 596 {
 597
 598         if (mutex_id > ACPI_MAX_MUTEX) {
 599                 return ("Invalid Mutex ID");
 600         }
 601
 602         return (acpi_gbl_mutex_names[mutex_id]);
 603 }
 604 #endif
 605
 606 /*******************************************************************************
 607  *
 608  * FUNCTION:    acpi_ut_valid_object_type
 609  *
 610  * PARAMETERS:  Type            - Object type to be validated
 611  *
 612  * RETURN:      TRUE if valid object type, FALSE otherwise
 613  *
 614  * DESCRIPTION: Validate an object type
 615  *
 616  ******************************************************************************/
 617
 618 u8 acpi_ut_valid_object_type(acpi_object_type type)
 619 {
 620
 621         if (type > ACPI_TYPE_LOCAL_MAX) {
 622
 623                 /* Note: Assumes all TYPEs are contiguous (external/local) */
 624
 625                 return (FALSE);
 626         }
 627
 628         return (TRUE);
 629 }
 630
 631 /*******************************************************************************
 632  *
 633  * FUNCTION:    acpi_ut_init_globals
 634  *
 635  * PARAMETERS:  None
 636  *
 637  * RETURN:      None
 638  *
 639  * DESCRIPTION: Init library globals.  All globals that require specific
 640  *              initialization should be initialized here!
 641  *
 642  ******************************************************************************/
 643
 644 void acpi_ut_init_globals(void)
 645 {
 646         acpi_status status;
 647         u32 i;
 648
 649         ACPI_FUNCTION_TRACE(ut_init_globals);
 650
 651         /* Create all memory caches */
 652
 653         status = acpi_ut_create_caches();
 654         if (ACPI_FAILURE(status)) {
 655                 return;
 656         }
 657
 658         /* Mutex locked flags */
 659
 660         for (i = 0; i < ACPI_NUM_MUTEX; i++) {
 661                 acpi_gbl_mutex_info[i].mutex = NULL;
 662                 acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 663                 acpi_gbl_mutex_info[i].use_count = 0;
 664         }
 665
 666         for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
 667                 acpi_gbl_owner_id_mask[i] = 0;
 668         }
 669         acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;        /* Last ID is never valid */
 670
 671         /* GPE support */
 672
 673         acpi_gpe_count = 0;
 674         acpi_gbl_gpe_xrupt_list_head = NULL;
 675         acpi_gbl_gpe_fadt_blocks[0] = NULL;
 676         acpi_gbl_gpe_fadt_blocks[1] = NULL;
 677
 678         /* Global notify handlers */
 679
 680         acpi_gbl_system_notify.handler = NULL;
 681         acpi_gbl_device_notify.handler = NULL;
 682         acpi_gbl_exception_handler = NULL;
 683         acpi_gbl_init_handler = NULL;
 684
 685         /* Global Lock support */
 686
 687         acpi_gbl_global_lock_semaphore = NULL;
 688         acpi_gbl_global_lock_mutex = NULL;
 689         acpi_gbl_global_lock_acquired = FALSE;
 690         acpi_gbl_global_lock_handle = 0;
 691
 692         /* Miscellaneous variables */
 693
 694         acpi_gbl_cm_single_step = FALSE;
 695         acpi_gbl_db_terminate_threads = FALSE;
 696         acpi_gbl_shutdown = FALSE;
 697         acpi_gbl_ns_lookup_count = 0;
 698         acpi_gbl_ps_find_count = 0;
 699         acpi_gbl_acpi_hardware_present = TRUE;
 700         acpi_gbl_last_owner_id_index = 0;
 701         acpi_gbl_next_owner_id_offset = 0;
 702         acpi_gbl_trace_method_name = 0;
 703         acpi_gbl_trace_dbg_level = 0;
 704         acpi_gbl_trace_dbg_layer = 0;
 705         acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
 706         acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
 707
 708         /* Hardware oriented */
 709
 710         acpi_gbl_events_initialized = FALSE;
 711         acpi_gbl_system_awake_and_running = TRUE;
 712
 713         /* Namespace */
 714
 715         acpi_gbl_root_node = NULL;
 716         acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
 717         acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
 718         acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
 719         acpi_gbl_root_node_struct.child = NULL;
 720         acpi_gbl_root_node_struct.peer = NULL;
 721         acpi_gbl_root_node_struct.object = NULL;
 722         acpi_gbl_root_node_struct.flags = ANOBJ_END_OF_PEER_LIST;
 723
 724 #ifdef ACPI_DEBUG_OUTPUT
 725         acpi_gbl_lowest_stack_pointer = ACPI_SIZE_MAX;
 726 #endif
 727
 728 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 729         acpi_gbl_display_final_mem_stats = FALSE;
 730 #endif
 731
 732         return_VOID;
 733 }
 734
 735 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
 736     ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
 737     ACPI_EXPORT_SYMBOL(acpi_gpe_count)