tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/******************************************************************************
2 *
3 * Module Name: utinit - Common ACPI subsystem initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2006, 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/acnamesp.h>
46#include <acpi/acevents.h>
47
48#define _COMPONENT ACPI_UTILITIES
49ACPI_MODULE_NAME("utinit")
50
51/* Local prototypes */
52static void
53acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset);
54
55static void acpi_ut_terminate(void);
56
57/*******************************************************************************
58 *
59 * FUNCTION: acpi_ut_fadt_register_error
60 *
61 * PARAMETERS: register_name - Pointer to string identifying register
62 * Value - Actual register contents value
63 * Offset - Byte offset in the FADT
64 *
65 * RETURN: AE_BAD_VALUE
66 *
67 * DESCRIPTION: Display failure message
68 *
69 ******************************************************************************/
70
71static void
72acpi_ut_fadt_register_error(char *register_name, u32 value, u8 offset)
73{
74
75 ACPI_WARNING((AE_INFO,
76 "Invalid FADT value %s=%X at offset %X FADT=%p",
77 register_name, value, offset, acpi_gbl_FADT));
78}
79
80/******************************************************************************
81 *
82 * FUNCTION: acpi_ut_validate_fadt
83 *
84 * PARAMETERS: None
85 *
86 * RETURN: Status
87 *
88 * DESCRIPTION: Validate various ACPI registers in the FADT
89 *
90 ******************************************************************************/
91
92acpi_status acpi_ut_validate_fadt(void)
93{
94
95 /*
96 * Verify Fixed ACPI Description Table fields,
97 * but don't abort on any problems, just display error
98 */
99 if (acpi_gbl_FADT->pm1_evt_len < 4) {
100 acpi_ut_fadt_register_error("PM1_EVT_LEN",
101 (u32) acpi_gbl_FADT->pm1_evt_len,
102 ACPI_FADT_OFFSET(pm1_evt_len));
103 }
104
105 if (!acpi_gbl_FADT->pm1_cnt_len) {
106 acpi_ut_fadt_register_error("PM1_CNT_LEN", 0,
107 ACPI_FADT_OFFSET(pm1_cnt_len));
108 }
109
110 if (!acpi_gbl_FADT->xpm1a_evt_blk.address) {
111 acpi_ut_fadt_register_error("X_PM1a_EVT_BLK", 0,
112 ACPI_FADT_OFFSET(xpm1a_evt_blk.
113 address));
114 }
115
116 if (!acpi_gbl_FADT->xpm1a_cnt_blk.address) {
117 acpi_ut_fadt_register_error("X_PM1a_CNT_BLK", 0,
118 ACPI_FADT_OFFSET(xpm1a_cnt_blk.
119 address));
120 }
121
122 if (!acpi_gbl_FADT->xpm_tmr_blk.address) {
123 acpi_ut_fadt_register_error("X_PM_TMR_BLK", 0,
124 ACPI_FADT_OFFSET(xpm_tmr_blk.
125 address));
126 }
127
128 if ((acpi_gbl_FADT->xpm2_cnt_blk.address &&
129 !acpi_gbl_FADT->pm2_cnt_len)) {
130 acpi_ut_fadt_register_error("PM2_CNT_LEN",
131 (u32) acpi_gbl_FADT->pm2_cnt_len,
132 ACPI_FADT_OFFSET(pm2_cnt_len));
133 }
134
135 if (acpi_gbl_FADT->pm_tm_len < 4) {
136 acpi_ut_fadt_register_error("PM_TM_LEN",
137 (u32) acpi_gbl_FADT->pm_tm_len,
138 ACPI_FADT_OFFSET(pm_tm_len));
139 }
140
141 /* Length of GPE blocks must be a multiple of 2 */
142
143 if (acpi_gbl_FADT->xgpe0_blk.address &&
144 (acpi_gbl_FADT->gpe0_blk_len & 1)) {
145 acpi_ut_fadt_register_error("(x)GPE0_BLK_LEN",
146 (u32) acpi_gbl_FADT->gpe0_blk_len,
147 ACPI_FADT_OFFSET(gpe0_blk_len));
148 }
149
150 if (acpi_gbl_FADT->xgpe1_blk.address &&
151 (acpi_gbl_FADT->gpe1_blk_len & 1)) {
152 acpi_ut_fadt_register_error("(x)GPE1_BLK_LEN",
153 (u32) acpi_gbl_FADT->gpe1_blk_len,
154 ACPI_FADT_OFFSET(gpe1_blk_len));
155 }
156
157 return (AE_OK);
158}
159
160/******************************************************************************
161 *
162 * FUNCTION: acpi_ut_terminate
163 *
164 * PARAMETERS: none
165 *
166 * RETURN: none
167 *
168 * DESCRIPTION: Free global memory
169 *
170 ******************************************************************************/
171
172static void acpi_ut_terminate(void)
173{
174 struct acpi_gpe_block_info *gpe_block;
175 struct acpi_gpe_block_info *next_gpe_block;
176 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
177 struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
178
179 ACPI_FUNCTION_TRACE(ut_terminate);
180
181 /* Free global tables, etc. */
182 /* Free global GPE blocks and related info structures */
183
184 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
185 while (gpe_xrupt_info) {
186 gpe_block = gpe_xrupt_info->gpe_block_list_head;
187 while (gpe_block) {
188 next_gpe_block = gpe_block->next;
189 ACPI_FREE(gpe_block->event_info);
190 ACPI_FREE(gpe_block->register_info);
191 ACPI_FREE(gpe_block);
192
193 gpe_block = next_gpe_block;
194 }
195 next_gpe_xrupt_info = gpe_xrupt_info->next;
196 ACPI_FREE(gpe_xrupt_info);
197 gpe_xrupt_info = next_gpe_xrupt_info;
198 }
199
200 return_VOID;
201}
202
203/*******************************************************************************
204 *
205 * FUNCTION: acpi_ut_subsystem_shutdown
206 *
207 * PARAMETERS: none
208 *
209 * RETURN: none
210 *
211 * DESCRIPTION: Shutdown the various subsystems. Don't delete the mutex
212 * objects here -- because the AML debugger may be still running.
213 *
214 ******************************************************************************/
215
216void acpi_ut_subsystem_shutdown(void)
217{
218
219 ACPI_FUNCTION_TRACE(ut_subsystem_shutdown);
220
221 /* Just exit if subsystem is already shutdown */
222
223 if (acpi_gbl_shutdown) {
224 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
225 return_VOID;
226 }
227
228 /* Subsystem appears active, go ahead and shut it down */
229
230 acpi_gbl_shutdown = TRUE;
231 acpi_gbl_startup_flags = 0;
232 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
233
234 /* Close the acpi_event Handling */
235
236 acpi_ev_terminate();
237
238 /* Close the Namespace */
239
240 acpi_ns_terminate();
241
242 /* Close the globals */
243
244 acpi_ut_terminate();
245
246 /* Purge the local caches */
247
248 (void)acpi_ut_delete_caches();
249 return_VOID;
250}