Merge /pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / drivers / acpi / utilities / utinit.c
1 /******************************************************************************
2  *
3  * Module Name: utinit - Common ACPI subsystem initialization
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2005, 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
45 #include <acpi/acpi.h>
46 #include <acpi/acnamesp.h>
47 #include <acpi/acevents.h>
48
49 #define _COMPONENT          ACPI_UTILITIES
50          ACPI_MODULE_NAME    ("utinit")
51
52 /* Local prototypes */
53
54 static void
55 acpi_ut_fadt_register_error (
56         char                            *register_name,
57         u32                             value,
58         acpi_size                       offset);
59
60 static void acpi_ut_terminate (
61         void);
62
63
64 /*******************************************************************************
65  *
66  * FUNCTION:    acpi_ut_fadt_register_error
67  *
68  * PARAMETERS:  register_name           - Pointer to string identifying register
69  *              Value                   - Actual register contents value
70  *              Offset                  - Byte offset in the FADT
71  *
72  * RETURN:      AE_BAD_VALUE
73  *
74  * DESCRIPTION: Display failure message
75  *
76  ******************************************************************************/
77
78 static void
79 acpi_ut_fadt_register_error (
80         char                            *register_name,
81         u32                             value,
82         acpi_size                       offset)
83 {
84
85         ACPI_REPORT_WARNING (
86                 ("Invalid FADT value %s=%X at offset %X FADT=%p\n",
87                 register_name, value, (u32) offset, acpi_gbl_FADT));
88 }
89
90
91 /******************************************************************************
92  *
93  * FUNCTION:    acpi_ut_validate_fadt
94  *
95  * PARAMETERS:  None
96  *
97  * RETURN:      Status
98  *
99  * DESCRIPTION: Validate various ACPI registers in the FADT
100  *
101  ******************************************************************************/
102
103 acpi_status
104 acpi_ut_validate_fadt (
105         void)
106 {
107
108         /*
109          * Verify Fixed ACPI Description Table fields,
110          * but don't abort on any problems, just display error
111          */
112         if (acpi_gbl_FADT->pm1_evt_len < 4) {
113                 acpi_ut_fadt_register_error ("PM1_EVT_LEN",
114                                   (u32) acpi_gbl_FADT->pm1_evt_len,
115                                   ACPI_FADT_OFFSET (pm1_evt_len));
116         }
117
118         if (!acpi_gbl_FADT->pm1_cnt_len) {
119                 acpi_ut_fadt_register_error ("PM1_CNT_LEN", 0,
120                                   ACPI_FADT_OFFSET (pm1_cnt_len));
121         }
122
123         if (!acpi_gbl_FADT->xpm1a_evt_blk.address) {
124                 acpi_ut_fadt_register_error ("X_PM1a_EVT_BLK", 0,
125                                   ACPI_FADT_OFFSET (xpm1a_evt_blk.address));
126         }
127
128         if (!acpi_gbl_FADT->xpm1a_cnt_blk.address) {
129                 acpi_ut_fadt_register_error ("X_PM1a_CNT_BLK", 0,
130                                   ACPI_FADT_OFFSET (xpm1a_cnt_blk.address));
131         }
132
133         if (!acpi_gbl_FADT->xpm_tmr_blk.address) {
134                 acpi_ut_fadt_register_error ("X_PM_TMR_BLK", 0,
135                                   ACPI_FADT_OFFSET (xpm_tmr_blk.address));
136         }
137
138         if ((acpi_gbl_FADT->xpm2_cnt_blk.address &&
139                 !acpi_gbl_FADT->pm2_cnt_len)) {
140                 acpi_ut_fadt_register_error ("PM2_CNT_LEN",
141                                   (u32) acpi_gbl_FADT->pm2_cnt_len,
142                                   ACPI_FADT_OFFSET (pm2_cnt_len));
143         }
144
145         if (acpi_gbl_FADT->pm_tm_len < 4) {
146                 acpi_ut_fadt_register_error ("PM_TM_LEN",
147                                   (u32) acpi_gbl_FADT->pm_tm_len,
148                                   ACPI_FADT_OFFSET (pm_tm_len));
149         }
150
151         /* Length of GPE blocks must be a multiple of 2 */
152
153         if (acpi_gbl_FADT->xgpe0_blk.address &&
154                 (acpi_gbl_FADT->gpe0_blk_len & 1)) {
155                 acpi_ut_fadt_register_error ("(x)GPE0_BLK_LEN",
156                                   (u32) acpi_gbl_FADT->gpe0_blk_len,
157                                   ACPI_FADT_OFFSET (gpe0_blk_len));
158         }
159
160         if (acpi_gbl_FADT->xgpe1_blk.address &&
161                 (acpi_gbl_FADT->gpe1_blk_len & 1)) {
162                 acpi_ut_fadt_register_error ("(x)GPE1_BLK_LEN",
163                                   (u32) acpi_gbl_FADT->gpe1_blk_len,
164                                   ACPI_FADT_OFFSET (gpe1_blk_len));
165         }
166
167         return (AE_OK);
168 }
169
170
171 /******************************************************************************
172  *
173  * FUNCTION:    acpi_ut_terminate
174  *
175  * PARAMETERS:  none
176  *
177  * RETURN:      none
178  *
179  * DESCRIPTION: Free global memory
180  *
181  ******************************************************************************/
182
183 static void
184 acpi_ut_terminate (
185         void)
186 {
187         struct acpi_gpe_block_info      *gpe_block;
188         struct acpi_gpe_block_info      *next_gpe_block;
189         struct acpi_gpe_xrupt_info      *gpe_xrupt_info;
190         struct acpi_gpe_xrupt_info      *next_gpe_xrupt_info;
191
192
193         ACPI_FUNCTION_TRACE ("ut_terminate");
194
195
196         /* Free global tables, etc. */
197         /* Free global GPE blocks and related info structures */
198
199         gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
200         while (gpe_xrupt_info) {
201                 gpe_block = gpe_xrupt_info->gpe_block_list_head;
202                 while (gpe_block) {
203                         next_gpe_block = gpe_block->next;
204                         ACPI_MEM_FREE (gpe_block->event_info);
205                         ACPI_MEM_FREE (gpe_block->register_info);
206                         ACPI_MEM_FREE (gpe_block);
207
208                         gpe_block = next_gpe_block;
209                 }
210                 next_gpe_xrupt_info = gpe_xrupt_info->next;
211                 ACPI_MEM_FREE (gpe_xrupt_info);
212                 gpe_xrupt_info = next_gpe_xrupt_info;
213         }
214
215         return_VOID;
216 }
217
218
219 /*******************************************************************************
220  *
221  * FUNCTION:    acpi_ut_subsystem_shutdown
222  *
223  * PARAMETERS:  none
224  *
225  * RETURN:      none
226  *
227  * DESCRIPTION: Shutdown the various subsystems.  Don't delete the mutex
228  *              objects here -- because the AML debugger may be still running.
229  *
230  ******************************************************************************/
231
232 void
233 acpi_ut_subsystem_shutdown (
234         void)
235 {
236
237         ACPI_FUNCTION_TRACE ("ut_subsystem_shutdown");
238
239         /* Just exit if subsystem is already shutdown */
240
241         if (acpi_gbl_shutdown) {
242                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
243                         "ACPI Subsystem is already terminated\n"));
244                 return_VOID;
245         }
246
247         /* Subsystem appears active, go ahead and shut it down */
248
249         acpi_gbl_shutdown = TRUE;
250         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
251                 "Shutting down ACPI Subsystem...\n"));
252
253         /* Close the acpi_event Handling */
254
255         acpi_ev_terminate ();
256
257         /* Close the Namespace */
258
259         acpi_ns_terminate ();
260
261         /* Close the globals */
262
263         acpi_ut_terminate ();
264
265         /* Purge the local caches */
266
267         (void) acpi_purge_cached_objects ();
268
269         /* Debug only - display leftover memory allocation, if any */
270
271 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
272         acpi_ut_dump_allocations (ACPI_UINT32_MAX, NULL);
273 #endif
274
275         return_VOID;
276 }
277
278