Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6
[linux-2.6] / 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
750         /* Last owner_iD is never valid */
751
752         acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;
753
754         /* GPE support */
755
756         acpi_gbl_gpe_xrupt_list_head = NULL;
757         acpi_gbl_gpe_fadt_blocks[0] = NULL;
758         acpi_gbl_gpe_fadt_blocks[1] = NULL;
759         acpi_current_gpe_count = 0;
760
761         /* Global handlers */
762
763         acpi_gbl_system_notify.handler = NULL;
764         acpi_gbl_device_notify.handler = NULL;
765         acpi_gbl_exception_handler = NULL;
766         acpi_gbl_init_handler = NULL;
767         acpi_gbl_table_handler = NULL;
768
769         /* Global Lock support */
770
771         acpi_gbl_global_lock_semaphore = NULL;
772         acpi_gbl_global_lock_mutex = NULL;
773         acpi_gbl_global_lock_acquired = FALSE;
774         acpi_gbl_global_lock_handle = 0;
775         acpi_gbl_global_lock_present = FALSE;
776
777         /* Miscellaneous variables */
778
779         acpi_gbl_cm_single_step = FALSE;
780         acpi_gbl_db_terminate_threads = FALSE;
781         acpi_gbl_shutdown = FALSE;
782         acpi_gbl_ns_lookup_count = 0;
783         acpi_gbl_ps_find_count = 0;
784         acpi_gbl_acpi_hardware_present = TRUE;
785         acpi_gbl_last_owner_id_index = 0;
786         acpi_gbl_next_owner_id_offset = 0;
787         acpi_gbl_trace_method_name = 0;
788         acpi_gbl_trace_dbg_level = 0;
789         acpi_gbl_trace_dbg_layer = 0;
790         acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
791         acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
792         acpi_gbl_osi_data = 0;
793
794         /* Hardware oriented */
795
796         acpi_gbl_events_initialized = FALSE;
797         acpi_gbl_system_awake_and_running = TRUE;
798
799         /* Namespace */
800
801         acpi_gbl_root_node = NULL;
802         acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
803         acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
804         acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
805         acpi_gbl_root_node_struct.child = NULL;
806         acpi_gbl_root_node_struct.peer = NULL;
807         acpi_gbl_root_node_struct.object = NULL;
808         acpi_gbl_root_node_struct.flags = ANOBJ_END_OF_PEER_LIST;
809
810 #ifdef ACPI_DEBUG_OUTPUT
811         acpi_gbl_lowest_stack_pointer = ACPI_CAST_PTR(acpi_size, ACPI_SIZE_MAX);
812 #endif
813
814 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
815         acpi_gbl_display_final_mem_stats = FALSE;
816 #endif
817
818         return_ACPI_STATUS(AE_OK);
819 }
820
821 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
822 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
823 ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
824 ACPI_EXPORT_SYMBOL(acpi_current_gpe_count)