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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [utilities/] [utxface.c] - Blame information for rev 62

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1 62 marcus.erl
/******************************************************************************
2
 *
3
 * Module Name: utxface - External interfaces for "global" ACPI functions
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
#include <acpi/acpi.h>
45
#include <acpi/acevents.h>
46
#include <acpi/acnamesp.h>
47
#include <acpi/acdebug.h>
48
 
49
#define _COMPONENT          ACPI_UTILITIES
50
ACPI_MODULE_NAME("utxface")
51
 
52
/*******************************************************************************
53
 *
54
 * FUNCTION:    acpi_initialize_subsystem
55
 *
56
 * PARAMETERS:  None
57
 *
58
 * RETURN:      Status
59
 *
60
 * DESCRIPTION: Initializes all global variables.  This is the first function
61
 *              called, so any early initialization belongs here.
62
 *
63
 ******************************************************************************/
64
acpi_status __init acpi_initialize_subsystem(void)
65
{
66
        acpi_status status;
67
 
68
        ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
69
 
70
        acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
71
        ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
72
 
73
        /* Initialize the OS-Dependent layer */
74
 
75
        status = acpi_os_initialize();
76
        if (ACPI_FAILURE(status)) {
77
                ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
78
                return_ACPI_STATUS(status);
79
        }
80
 
81
        /* Initialize all globals used by the subsystem */
82
 
83
        acpi_ut_init_globals();
84
 
85
        /* Create the default mutex objects */
86
 
87
        status = acpi_ut_mutex_initialize();
88
        if (ACPI_FAILURE(status)) {
89
                ACPI_EXCEPTION((AE_INFO, status,
90
                                "During Global Mutex creation"));
91
                return_ACPI_STATUS(status);
92
        }
93
 
94
        /*
95
         * Initialize the namespace manager and
96
         * the root of the namespace tree
97
         */
98
        status = acpi_ns_root_initialize();
99
        if (ACPI_FAILURE(status)) {
100
                ACPI_EXCEPTION((AE_INFO, status,
101
                                "During Namespace initialization"));
102
                return_ACPI_STATUS(status);
103
        }
104
 
105
        /* If configured, initialize the AML debugger */
106
 
107
        ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
108
        return_ACPI_STATUS(status);
109
}
110
 
111
/*******************************************************************************
112
 *
113
 * FUNCTION:    acpi_enable_subsystem
114
 *
115
 * PARAMETERS:  Flags           - Init/enable Options
116
 *
117
 * RETURN:      Status
118
 *
119
 * DESCRIPTION: Completes the subsystem initialization including hardware.
120
 *              Puts system into ACPI mode if it isn't already.
121
 *
122
 ******************************************************************************/
123
acpi_status acpi_enable_subsystem(u32 flags)
124
{
125
        acpi_status status = AE_OK;
126
 
127
        ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
128
 
129
        /* Enable ACPI mode */
130
 
131
        if (!(flags & ACPI_NO_ACPI_ENABLE)) {
132
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
133
                                  "[Init] Going into ACPI mode\n"));
134
 
135
                acpi_gbl_original_mode = acpi_hw_get_mode();
136
 
137
                status = acpi_enable();
138
                if (ACPI_FAILURE(status)) {
139
                        ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
140
                        return_ACPI_STATUS(status);
141
                }
142
        }
143
 
144
        /*
145
         * Install the default op_region handlers. These are installed unless
146
         * other handlers have already been installed via the
147
         * install_address_space_handler interface.
148
         */
149
        if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
150
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
151
                                  "[Init] Installing default address space handlers\n"));
152
 
153
                status = acpi_ev_install_region_handlers();
154
                if (ACPI_FAILURE(status)) {
155
                        return_ACPI_STATUS(status);
156
                }
157
        }
158
 
159
        /*
160
         * Initialize ACPI Event handling (Fixed and General Purpose)
161
         *
162
         * Note1: We must have the hardware and events initialized before we can
163
         * execute any control methods safely. Any control method can require
164
         * ACPI hardware support, so the hardware must be fully initialized before
165
         * any method execution!
166
         *
167
         * Note2: Fixed events are initialized and enabled here. GPEs are
168
         * initialized, but cannot be enabled until after the hardware is
169
         * completely initialized (SCI and global_lock activated)
170
         */
171
        if (!(flags & ACPI_NO_EVENT_INIT)) {
172
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
173
                                  "[Init] Initializing ACPI events\n"));
174
 
175
                status = acpi_ev_initialize_events();
176
                if (ACPI_FAILURE(status)) {
177
                        return_ACPI_STATUS(status);
178
                }
179
        }
180
 
181
        /*
182
         * Install the SCI handler and Global Lock handler. This completes the
183
         * hardware initialization.
184
         */
185
        if (!(flags & ACPI_NO_HANDLER_INIT)) {
186
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
187
                                  "[Init] Installing SCI/GL handlers\n"));
188
 
189
                status = acpi_ev_install_xrupt_handlers();
190
                if (ACPI_FAILURE(status)) {
191
                        return_ACPI_STATUS(status);
192
                }
193
        }
194
 
195
        /*
196
         * Complete the GPE initialization for the GPE blocks defined in the FADT
197
         * (GPE block 0 and 1).
198
         *
199
         * Note1: This is where the _PRW methods are executed for the GPEs. These
200
         * methods can only be executed after the SCI and Global Lock handlers are
201
         * installed and initialized.
202
         *
203
         * Note2: Currently, there seems to be no need to run the _REG methods
204
         * before execution of the _PRW methods and enabling of the GPEs.
205
         */
206
        if (!(flags & ACPI_NO_EVENT_INIT)) {
207
                status = acpi_ev_install_fadt_gpes();
208
                if (ACPI_FAILURE(status)) {
209
                        return (status);
210
                }
211
        }
212
 
213
        return_ACPI_STATUS(status);
214
}
215
 
216
ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
217
 
218
/*******************************************************************************
219
 *
220
 * FUNCTION:    acpi_initialize_objects
221
 *
222
 * PARAMETERS:  Flags           - Init/enable Options
223
 *
224
 * RETURN:      Status
225
 *
226
 * DESCRIPTION: Completes namespace initialization by initializing device
227
 *              objects and executing AML code for Regions, buffers, etc.
228
 *
229
 ******************************************************************************/
230
acpi_status acpi_initialize_objects(u32 flags)
231
{
232
        acpi_status status = AE_OK;
233
 
234
        ACPI_FUNCTION_TRACE(acpi_initialize_objects);
235
 
236
        /*
237
         * Run all _REG methods
238
         *
239
         * Note: Any objects accessed by the _REG methods will be automatically
240
         * initialized, even if they contain executable AML (see the call to
241
         * acpi_ns_initialize_objects below).
242
         */
243
        if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
244
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
245
                                  "[Init] Executing _REG OpRegion methods\n"));
246
 
247
                status = acpi_ev_initialize_op_regions();
248
                if (ACPI_FAILURE(status)) {
249
                        return_ACPI_STATUS(status);
250
                }
251
        }
252
 
253
        /*
254
         * Initialize the objects that remain uninitialized. This runs the
255
         * executable AML that may be part of the declaration of these objects:
256
         * operation_regions, buffer_fields, Buffers, and Packages.
257
         */
258
        if (!(flags & ACPI_NO_OBJECT_INIT)) {
259
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
260
                                  "[Init] Completing Initialization of ACPI Objects\n"));
261
 
262
                status = acpi_ns_initialize_objects();
263
                if (ACPI_FAILURE(status)) {
264
                        return_ACPI_STATUS(status);
265
                }
266
        }
267
 
268
        /*
269
         * Initialize all device objects in the namespace. This runs the device
270
         * _STA and _INI methods.
271
         */
272
        if (!(flags & ACPI_NO_DEVICE_INIT)) {
273
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
274
                                  "[Init] Initializing ACPI Devices\n"));
275
 
276
                status = acpi_ns_initialize_devices();
277
                if (ACPI_FAILURE(status)) {
278
                        return_ACPI_STATUS(status);
279
                }
280
        }
281
 
282
        /*
283
         * Empty the caches (delete the cached objects) on the assumption that
284
         * the table load filled them up more than they will be at runtime --
285
         * thus wasting non-paged memory.
286
         */
287
        status = acpi_purge_cached_objects();
288
 
289
        acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
290
        return_ACPI_STATUS(status);
291
}
292
 
293
ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
294
 
295
/*******************************************************************************
296
 *
297
 * FUNCTION:    acpi_terminate
298
 *
299
 * PARAMETERS:  None
300
 *
301
 * RETURN:      Status
302
 *
303
 * DESCRIPTION: Shutdown the ACPI subsystem.  Release all resources.
304
 *
305
 ******************************************************************************/
306
acpi_status acpi_terminate(void)
307
{
308
        acpi_status status;
309
 
310
        ACPI_FUNCTION_TRACE(acpi_terminate);
311
 
312
        /* Terminate the AML Debugger if present */
313
 
314
        ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
315
 
316
        /* Shutdown and free all resources */
317
 
318
        acpi_ut_subsystem_shutdown();
319
 
320
        /* Free the mutex objects */
321
 
322
        acpi_ut_mutex_terminate();
323
 
324
#ifdef ACPI_DEBUGGER
325
 
326
        /* Shut down the debugger */
327
 
328
        acpi_db_terminate();
329
#endif
330
 
331
        /* Now we can shutdown the OS-dependent layer */
332
 
333
        status = acpi_os_terminate();
334
        return_ACPI_STATUS(status);
335
}
336
 
337
ACPI_EXPORT_SYMBOL(acpi_terminate)
338
#ifdef ACPI_FUTURE_USAGE
339
/*******************************************************************************
340
 *
341
 * FUNCTION:    acpi_subsystem_status
342
 *
343
 * PARAMETERS:  None
344
 *
345
 * RETURN:      Status of the ACPI subsystem
346
 *
347
 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
348
 *              before making any other calls, to ensure the subsystem
349
 *              initialized successfully.
350
 *
351
 ******************************************************************************/
352
acpi_status acpi_subsystem_status(void)
353
{
354
 
355
        if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
356
                return (AE_OK);
357
        } else {
358
                return (AE_ERROR);
359
        }
360
}
361
 
362
ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
363
 
364
/*******************************************************************************
365
 *
366
 * FUNCTION:    acpi_get_system_info
367
 *
368
 * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
369
 *                                device
370
 *
371
 * RETURN:      Status          - the status of the call
372
 *
373
 * DESCRIPTION: This function is called to get information about the current
374
 *              state of the ACPI subsystem.  It will return system information
375
 *              in the out_buffer.
376
 *
377
 *              If the function fails an appropriate status will be returned
378
 *              and the value of out_buffer is undefined.
379
 *
380
 ******************************************************************************/
381
acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
382
{
383
        struct acpi_system_info *info_ptr;
384
        acpi_status status;
385
 
386
        ACPI_FUNCTION_TRACE(acpi_get_system_info);
387
 
388
        /* Parameter validation */
389
 
390
        status = acpi_ut_validate_buffer(out_buffer);
391
        if (ACPI_FAILURE(status)) {
392
                return_ACPI_STATUS(status);
393
        }
394
 
395
        /* Validate/Allocate/Clear caller buffer */
396
 
397
        status =
398
            acpi_ut_initialize_buffer(out_buffer,
399
                                      sizeof(struct acpi_system_info));
400
        if (ACPI_FAILURE(status)) {
401
                return_ACPI_STATUS(status);
402
        }
403
 
404
        /*
405
         * Populate the return buffer
406
         */
407
        info_ptr = (struct acpi_system_info *)out_buffer->pointer;
408
 
409
        info_ptr->acpi_ca_version = ACPI_CA_VERSION;
410
 
411
        /* System flags (ACPI capabilities) */
412
 
413
        info_ptr->flags = ACPI_SYS_MODE_ACPI;
414
 
415
        /* Timer resolution - 24 or 32 bits  */
416
 
417
        if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
418
                info_ptr->timer_resolution = 24;
419
        } else {
420
                info_ptr->timer_resolution = 32;
421
        }
422
 
423
        /* Clear the reserved fields */
424
 
425
        info_ptr->reserved1 = 0;
426
        info_ptr->reserved2 = 0;
427
 
428
        /* Current debug levels */
429
 
430
        info_ptr->debug_layer = acpi_dbg_layer;
431
        info_ptr->debug_level = acpi_dbg_level;
432
 
433
        return_ACPI_STATUS(AE_OK);
434
}
435
 
436
ACPI_EXPORT_SYMBOL(acpi_get_system_info)
437
 
438
/*****************************************************************************
439
 *
440
 * FUNCTION:    acpi_install_initialization_handler
441
 *
442
 * PARAMETERS:  Handler             - Callback procedure
443
 *              Function            - Not (currently) used, see below
444
 *
445
 * RETURN:      Status
446
 *
447
 * DESCRIPTION: Install an initialization handler
448
 *
449
 * TBD: When a second function is added, must save the Function also.
450
 *
451
 ****************************************************************************/
452
acpi_status
453
acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
454
{
455
 
456
        if (!handler) {
457
                return (AE_BAD_PARAMETER);
458
        }
459
 
460
        if (acpi_gbl_init_handler) {
461
                return (AE_ALREADY_EXISTS);
462
        }
463
 
464
        acpi_gbl_init_handler = handler;
465
        return AE_OK;
466
}
467
 
468
ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
469
#endif                          /*  ACPI_FUTURE_USAGE  */
470
/*****************************************************************************
471
 *
472
 * FUNCTION:    acpi_purge_cached_objects
473
 *
474
 * PARAMETERS:  None
475
 *
476
 * RETURN:      Status
477
 *
478
 * DESCRIPTION: Empty all caches (delete the cached objects)
479
 *
480
 ****************************************************************************/
481
acpi_status acpi_purge_cached_objects(void)
482
{
483
        ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
484
 
485
        (void)acpi_os_purge_cache(acpi_gbl_state_cache);
486
        (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
487
        (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
488
        (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
489
        return_ACPI_STATUS(AE_OK);
490
}
491
 
492
ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)

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