drivers/acpi/acpica/utdecode.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utdecode - Utility decoding routines (value-to-string)
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2011, 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 "acnamesp.h"
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utdecode")
  50
  51 /*******************************************************************************
  52  *
  53  * FUNCTION:    acpi_format_exception
  54  *
  55  * PARAMETERS:  Status       - The acpi_status code to be formatted
  56  *
  57  * RETURN:      A string containing the exception text. A valid pointer is
  58  *              always returned.
  59  *
  60  * DESCRIPTION: This function translates an ACPI exception into an ASCII string
  61  *              It is here instead of utxface.c so it is always present.
  62  *
  63  ******************************************************************************/
  64 const char *acpi_format_exception(acpi_status status)
  65 {
  66         const char *exception = NULL;
  67
  68         ACPI_FUNCTION_ENTRY();
  69
  70         exception = acpi_ut_validate_exception(status);
  71         if (!exception) {
  72
  73                 /* Exception code was not recognized */
  74
  75                 ACPI_ERROR((AE_INFO,
  76                             "Unknown exception code: 0x%8.8X", status));
  77
  78                 exception = "UNKNOWN_STATUS_CODE";
  79         }
  80
  81         return (ACPI_CAST_PTR(const char, exception));
  82 }
  83
  84 ACPI_EXPORT_SYMBOL(acpi_format_exception)
  85
  86 /*
  87  * Properties of the ACPI Object Types, both internal and external.
  88  * The table is indexed by values of acpi_object_type
  89  */
  90 const u8 acpi_gbl_ns_properties[ACPI_NUM_NS_TYPES] = {
  91         ACPI_NS_NORMAL,         /* 00 Any              */
  92         ACPI_NS_NORMAL,         /* 01 Number           */
  93         ACPI_NS_NORMAL,         /* 02 String           */
  94         ACPI_NS_NORMAL,         /* 03 Buffer           */
  95         ACPI_NS_NORMAL,         /* 04 Package          */
  96         ACPI_NS_NORMAL,         /* 05 field_unit       */
  97         ACPI_NS_NEWSCOPE,       /* 06 Device           */
  98         ACPI_NS_NORMAL,         /* 07 Event            */
  99         ACPI_NS_NEWSCOPE,       /* 08 Method           */
 100         ACPI_NS_NORMAL,         /* 09 Mutex            */
 101         ACPI_NS_NORMAL,         /* 10 Region           */
 102         ACPI_NS_NEWSCOPE,       /* 11 Power            */
 103         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
 104         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
 105         ACPI_NS_NORMAL,         /* 14 buffer_field     */
 106         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
 107         ACPI_NS_NORMAL,         /* 16 Debug Object     */
 108         ACPI_NS_NORMAL,         /* 17 def_field        */
 109         ACPI_NS_NORMAL,         /* 18 bank_field       */
 110         ACPI_NS_NORMAL,         /* 19 index_field      */
 111         ACPI_NS_NORMAL,         /* 20 Reference        */
 112         ACPI_NS_NORMAL,         /* 21 Alias            */
 113         ACPI_NS_NORMAL,         /* 22 method_alias     */
 114         ACPI_NS_NORMAL,         /* 23 Notify           */
 115         ACPI_NS_NORMAL,         /* 24 Address Handler  */
 116         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
 117         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
 118         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
 119         ACPI_NS_NORMAL,         /* 28 Extra            */
 120         ACPI_NS_NORMAL,         /* 29 Data             */
 121         ACPI_NS_NORMAL          /* 30 Invalid          */
 122 };
 123
 124 /*******************************************************************************
 125  *
 126  * FUNCTION:    acpi_ut_hex_to_ascii_char
 127  *
 128  * PARAMETERS:  Integer             - Contains the hex digit
 129  *              Position            - bit position of the digit within the
 130  *                                    integer (multiple of 4)
 131  *
 132  * RETURN:      The converted Ascii character
 133  *
 134  * DESCRIPTION: Convert a hex digit to an Ascii character
 135  *
 136  ******************************************************************************/
 137
 138 /* Hex to ASCII conversion table */
 139
 140 static const char acpi_gbl_hex_to_ascii[] = {
 141         '0', '1', '2', '3', '4', '5', '6', '7',
 142         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
 143 };
 144
 145 char acpi_ut_hex_to_ascii_char(u64 integer, u32 position)
 146 {
 147
 148         return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
 149 }
 150
 151 /*******************************************************************************
 152  *
 153  * FUNCTION:    acpi_ut_get_region_name
 154  *
 155  * PARAMETERS:  Space ID            - ID for the region
 156  *
 157  * RETURN:      Decoded region space_id name
 158  *
 159  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 160  *
 161  ******************************************************************************/
 162
 163 /* Region type decoding */
 164
 165 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 166         "SystemMemory",
 167         "SystemIO",
 168         "PCI_Config",
 169         "EmbeddedControl",
 170         "SMBus",
 171         "SystemCMOS",
 172         "PCIBARTarget",
 173         "IPMI",
 174         "DataTable"
 175 };
 176
 177 char *acpi_ut_get_region_name(u8 space_id)
 178 {
 179
 180         if (space_id >= ACPI_USER_REGION_BEGIN) {
 181                 return ("UserDefinedRegion");
 182         } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
 183                 return ("FunctionalFixedHW");
 184         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
 185                 return ("InvalidSpaceId");
 186         }
 187
 188         return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
 189 }
 190
 191 /*******************************************************************************
 192  *
 193  * FUNCTION:    acpi_ut_get_event_name
 194  *
 195  * PARAMETERS:  event_id            - Fixed event ID
 196  *
 197  * RETURN:      Decoded event ID name
 198  *
 199  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 200  *
 201  ******************************************************************************/
 202
 203 /* Event type decoding */
 204
 205 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 206         "PM_Timer",
 207         "GlobalLock",
 208         "PowerButton",
 209         "SleepButton",
 210         "RealTimeClock",
 211 };
 212
 213 char *acpi_ut_get_event_name(u32 event_id)
 214 {
 215
 216         if (event_id > ACPI_EVENT_MAX) {
 217                 return ("InvalidEventID");
 218         }
 219
 220         return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
 221 }
 222
 223 /*******************************************************************************
 224  *
 225  * FUNCTION:    acpi_ut_get_type_name
 226  *
 227  * PARAMETERS:  Type                - An ACPI object type
 228  *
 229  * RETURN:      Decoded ACPI object type name
 230  *
 231  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 232  *
 233  ******************************************************************************/
 234
 235 /*
 236  * Elements of acpi_gbl_ns_type_names below must match
 237  * one-to-one with values of acpi_object_type
 238  *
 239  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 240  * when stored in a table it really means that we have thus far seen no
 241  * evidence to indicate what type is actually going to be stored for this entry.
 242  */
 243 static const char acpi_gbl_bad_type[] = "UNDEFINED";
 244
 245 /* Printable names of the ACPI object types */
 246
 247 static const char *acpi_gbl_ns_type_names[] = {
 248         /* 00 */ "Untyped",
 249         /* 01 */ "Integer",
 250         /* 02 */ "String",
 251         /* 03 */ "Buffer",
 252         /* 04 */ "Package",
 253         /* 05 */ "FieldUnit",
 254         /* 06 */ "Device",
 255         /* 07 */ "Event",
 256         /* 08 */ "Method",
 257         /* 09 */ "Mutex",
 258         /* 10 */ "Region",
 259         /* 11 */ "Power",
 260         /* 12 */ "Processor",
 261         /* 13 */ "Thermal",
 262         /* 14 */ "BufferField",
 263         /* 15 */ "DdbHandle",
 264         /* 16 */ "DebugObject",
 265         /* 17 */ "RegionField",
 266         /* 18 */ "BankField",
 267         /* 19 */ "IndexField",
 268         /* 20 */ "Reference",
 269         /* 21 */ "Alias",
 270         /* 22 */ "MethodAlias",
 271         /* 23 */ "Notify",
 272         /* 24 */ "AddrHandler",
 273         /* 25 */ "ResourceDesc",
 274         /* 26 */ "ResourceFld",
 275         /* 27 */ "Scope",
 276         /* 28 */ "Extra",
 277         /* 29 */ "Data",
 278         /* 30 */ "Invalid"
 279 };
 280
 281 char *acpi_ut_get_type_name(acpi_object_type type)
 282 {
 283
 284         if (type > ACPI_TYPE_INVALID) {
 285                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 286         }
 287
 288         return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
 289 }
 290
 291 char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 292 {
 293
 294         if (!obj_desc) {
 295                 return ("[NULL Object Descriptor]");
 296         }
 297
 298         return (acpi_ut_get_type_name(obj_desc->common.type));
 299 }
 300
 301 /*******************************************************************************
 302  *
 303  * FUNCTION:    acpi_ut_get_node_name
 304  *
 305  * PARAMETERS:  Object               - A namespace node
 306  *
 307  * RETURN:      ASCII name of the node
 308  *
 309  * DESCRIPTION: Validate the node and return the node's ACPI name.
 310  *
 311  ******************************************************************************/
 312
 313 char *acpi_ut_get_node_name(void *object)
 314 {
 315         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 316
 317         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
 318
 319         if (!object) {
 320                 return ("NULL");
 321         }
 322
 323         /* Check for Root node */
 324
 325         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
 326                 return ("\"\\\" ");
 327         }
 328
 329         /* Descriptor must be a namespace node */
 330
 331         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
 332                 return ("####");
 333         }
 334
 335         /*
 336          * Ensure name is valid. The name was validated/repaired when the node
 337          * was created, but make sure it has not been corrupted.
 338          */
 339         acpi_ut_repair_name(node->name.ascii);
 340
 341         /* Return the name */
 342
 343         return (node->name.ascii);
 344 }
 345
 346 /*******************************************************************************
 347  *
 348  * FUNCTION:    acpi_ut_get_descriptor_name
 349  *
 350  * PARAMETERS:  Object               - An ACPI object
 351  *
 352  * RETURN:      Decoded name of the descriptor type
 353  *
 354  * DESCRIPTION: Validate object and return the descriptor type
 355  *
 356  ******************************************************************************/
 357
 358 /* Printable names of object descriptor types */
 359
 360 static const char *acpi_gbl_desc_type_names[] = {
 361         /* 00 */ "Not a Descriptor",
 362         /* 01 */ "Cached",
 363         /* 02 */ "State-Generic",
 364         /* 03 */ "State-Update",
 365         /* 04 */ "State-Package",
 366         /* 05 */ "State-Control",
 367         /* 06 */ "State-RootParseScope",
 368         /* 07 */ "State-ParseScope",
 369         /* 08 */ "State-WalkScope",
 370         /* 09 */ "State-Result",
 371         /* 10 */ "State-Notify",
 372         /* 11 */ "State-Thread",
 373         /* 12 */ "Walk",
 374         /* 13 */ "Parser",
 375         /* 14 */ "Operand",
 376         /* 15 */ "Node"
 377 };
 378
 379 char *acpi_ut_get_descriptor_name(void *object)
 380 {
 381
 382         if (!object) {
 383                 return ("NULL OBJECT");
 384         }
 385
 386         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
 387                 return ("Not a Descriptor");
 388         }
 389
 390         return (ACPI_CAST_PTR(char,
 391                               acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
 392                                                        (object)]));
 393
 394 }
 395
 396 /*******************************************************************************
 397  *
 398  * FUNCTION:    acpi_ut_get_reference_name
 399  *
 400  * PARAMETERS:  Object               - An ACPI reference object
 401  *
 402  * RETURN:      Decoded name of the type of reference
 403  *
 404  * DESCRIPTION: Decode a reference object sub-type to a string.
 405  *
 406  ******************************************************************************/
 407
 408 /* Printable names of reference object sub-types */
 409
 410 static const char *acpi_gbl_ref_class_names[] = {
 411         /* 00 */ "Local",
 412         /* 01 */ "Argument",
 413         /* 02 */ "RefOf",
 414         /* 03 */ "Index",
 415         /* 04 */ "DdbHandle",
 416         /* 05 */ "Named Object",
 417         /* 06 */ "Debug"
 418 };
 419
 420 const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
 421 {
 422
 423         if (!object) {
 424                 return ("NULL Object");
 425         }
 426
 427         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
 428                 return ("Not an Operand object");
 429         }
 430
 431         if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
 432                 return ("Not a Reference object");
 433         }
 434
 435         if (object->reference.class > ACPI_REFCLASS_MAX) {
 436                 return ("Unknown Reference class");
 437         }
 438
 439         return (acpi_gbl_ref_class_names[object->reference.class]);
 440 }
 441
 442 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 443 /*
 444  * Strings and procedures used for debug only
 445  */
 446
 447 /*******************************************************************************
 448  *
 449  * FUNCTION:    acpi_ut_get_mutex_name
 450  *
 451  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 452  *
 453  * RETURN:      Decoded name of the internal mutex
 454  *
 455  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 456  *
 457  ******************************************************************************/
 458
 459 /* Names for internal mutex objects, used for debug output */
 460
 461 static char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
 462         "ACPI_MTX_Interpreter",
 463         "ACPI_MTX_Namespace",
 464         "ACPI_MTX_Tables",
 465         "ACPI_MTX_Events",
 466         "ACPI_MTX_Caches",
 467         "ACPI_MTX_Memory",
 468         "ACPI_MTX_CommandComplete",
 469         "ACPI_MTX_CommandReady"
 470 };
 471
 472 char *acpi_ut_get_mutex_name(u32 mutex_id)
 473 {
 474
 475         if (mutex_id > ACPI_MAX_MUTEX) {
 476                 return ("Invalid Mutex ID");
 477         }
 478
 479         return (acpi_gbl_mutex_names[mutex_id]);
 480 }
 481
 482 /*******************************************************************************
 483  *
 484  * FUNCTION:    acpi_ut_get_notify_name
 485  *
 486  * PARAMETERS:  notify_value    - Value from the Notify() request
 487  *
 488  * RETURN:      Decoded name for the notify value
 489  *
 490  * DESCRIPTION: Translate a Notify Value to a notify namestring.
 491  *
 492  ******************************************************************************/
 493
 494 /* Names for Notify() values, used for debug output */
 495
 496 static const char *acpi_gbl_notify_value_names[] = {
 497         "Bus Check",
 498         "Device Check",
 499         "Device Wake",
 500         "Eject Request",
 501         "Device Check Light",
 502         "Frequency Mismatch",
 503         "Bus Mode Mismatch",
 504         "Power Fault",
 505         "Capabilities Check",
 506         "Device PLD Check",
 507         "Reserved",
 508         "System Locality Update"
 509 };
 510
 511 const char *acpi_ut_get_notify_name(u32 notify_value)
 512 {
 513
 514         if (notify_value <= ACPI_NOTIFY_MAX) {
 515                 return (acpi_gbl_notify_value_names[notify_value]);
 516         } else if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
 517                 return ("Reserved");
 518         } else {                /* Greater or equal to 0x80 */
 519
 520                 return ("**Device Specific**");
 521         }
 522 }
 523 #endif
 524
 525 /*******************************************************************************
 526  *
 527  * FUNCTION:    acpi_ut_valid_object_type
 528  *
 529  * PARAMETERS:  Type            - Object type to be validated
 530  *
 531  * RETURN:      TRUE if valid object type, FALSE otherwise
 532  *
 533  * DESCRIPTION: Validate an object type
 534  *
 535  ******************************************************************************/
 536
 537 u8 acpi_ut_valid_object_type(acpi_object_type type)
 538 {
 539
 540         if (type > ACPI_TYPE_LOCAL_MAX) {
 541
 542                 /* Note: Assumes all TYPEs are contiguous (external/local) */
 543
 544                 return (FALSE);
 545         }
 546
 547         return (TRUE);
 548 }