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73459f73 RM |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utstate - state object support procedures | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
73459f73 RM |
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 | ||
73459f73 RM |
44 | #include <acpi/acpi.h> |
45 | ||
46 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 47 | ACPI_MODULE_NAME("utstate") |
73459f73 RM |
48 | |
49 | /******************************************************************************* | |
50 | * | |
51 | * FUNCTION: acpi_ut_create_pkg_state_and_push | |
52 | * | |
53 | * PARAMETERS: Object - Object to be added to the new state | |
54 | * Action - Increment/Decrement | |
55 | * state_list - List the state will be added to | |
56 | * | |
57 | * RETURN: Status | |
58 | * | |
59 | * DESCRIPTION: Create a new state and push it | |
60 | * | |
61 | ******************************************************************************/ | |
73459f73 | 62 | acpi_status |
4be44fcd LB |
63 | acpi_ut_create_pkg_state_and_push(void *internal_object, |
64 | void *external_object, | |
65 | u16 index, | |
96db255c | 66 | union acpi_generic_state **state_list) |
73459f73 | 67 | { |
4be44fcd | 68 | union acpi_generic_state *state; |
73459f73 | 69 | |
4be44fcd | 70 | ACPI_FUNCTION_ENTRY(); |
73459f73 | 71 | |
4be44fcd LB |
72 | state = |
73 | acpi_ut_create_pkg_state(internal_object, external_object, index); | |
73459f73 RM |
74 | if (!state) { |
75 | return (AE_NO_MEMORY); | |
76 | } | |
77 | ||
4be44fcd | 78 | acpi_ut_push_generic_state(state_list, state); |
73459f73 RM |
79 | return (AE_OK); |
80 | } | |
81 | ||
73459f73 RM |
82 | /******************************************************************************* |
83 | * | |
84 | * FUNCTION: acpi_ut_push_generic_state | |
85 | * | |
86 | * PARAMETERS: list_head - Head of the state stack | |
87 | * State - State object to push | |
88 | * | |
89 | * RETURN: None | |
90 | * | |
91 | * DESCRIPTION: Push a state object onto a state stack | |
92 | * | |
93 | ******************************************************************************/ | |
94 | ||
95 | void | |
4be44fcd LB |
96 | acpi_ut_push_generic_state(union acpi_generic_state **list_head, |
97 | union acpi_generic_state *state) | |
73459f73 | 98 | { |
b229cf92 | 99 | ACPI_FUNCTION_TRACE(ut_push_generic_state); |
73459f73 RM |
100 | |
101 | /* Push the state object onto the front of the list (stack) */ | |
102 | ||
103 | state->common.next = *list_head; | |
104 | *list_head = state; | |
105 | ||
106 | return_VOID; | |
107 | } | |
108 | ||
73459f73 RM |
109 | /******************************************************************************* |
110 | * | |
111 | * FUNCTION: acpi_ut_pop_generic_state | |
112 | * | |
113 | * PARAMETERS: list_head - Head of the state stack | |
114 | * | |
115 | * RETURN: The popped state object | |
116 | * | |
117 | * DESCRIPTION: Pop a state object from a state stack | |
118 | * | |
119 | ******************************************************************************/ | |
120 | ||
4be44fcd LB |
121 | union acpi_generic_state *acpi_ut_pop_generic_state(union acpi_generic_state |
122 | **list_head) | |
73459f73 | 123 | { |
4be44fcd | 124 | union acpi_generic_state *state; |
73459f73 | 125 | |
b229cf92 | 126 | ACPI_FUNCTION_TRACE(ut_pop_generic_state); |
73459f73 RM |
127 | |
128 | /* Remove the state object at the head of the list (stack) */ | |
129 | ||
130 | state = *list_head; | |
131 | if (state) { | |
52fc0b02 | 132 | |
73459f73 RM |
133 | /* Update the list head */ |
134 | ||
135 | *list_head = state->common.next; | |
136 | } | |
137 | ||
4be44fcd | 138 | return_PTR(state); |
73459f73 RM |
139 | } |
140 | ||
73459f73 RM |
141 | /******************************************************************************* |
142 | * | |
143 | * FUNCTION: acpi_ut_create_generic_state | |
144 | * | |
145 | * PARAMETERS: None | |
146 | * | |
147 | * RETURN: The new state object. NULL on failure. | |
148 | * | |
149 | * DESCRIPTION: Create a generic state object. Attempt to obtain one from | |
150 | * the global state cache; If none available, create a new one. | |
151 | * | |
152 | ******************************************************************************/ | |
153 | ||
4be44fcd | 154 | union acpi_generic_state *acpi_ut_create_generic_state(void) |
73459f73 | 155 | { |
4be44fcd | 156 | union acpi_generic_state *state; |
73459f73 | 157 | |
4be44fcd | 158 | ACPI_FUNCTION_ENTRY(); |
73459f73 | 159 | |
4be44fcd | 160 | state = acpi_os_acquire_object(acpi_gbl_state_cache); |
73459f73 | 161 | if (state) { |
52fc0b02 | 162 | |
73459f73 RM |
163 | /* Initialize */ |
164 | memset(state, 0, sizeof(union acpi_generic_state)); | |
61686124 | 165 | state->common.descriptor_type = ACPI_DESC_TYPE_STATE; |
73459f73 RM |
166 | } |
167 | ||
168 | return (state); | |
169 | } | |
170 | ||
73459f73 RM |
171 | /******************************************************************************* |
172 | * | |
173 | * FUNCTION: acpi_ut_create_thread_state | |
174 | * | |
175 | * PARAMETERS: None | |
176 | * | |
177 | * RETURN: New Thread State. NULL on failure | |
178 | * | |
179 | * DESCRIPTION: Create a "Thread State" - a flavor of the generic state used | |
180 | * to track per-thread info during method execution | |
181 | * | |
182 | ******************************************************************************/ | |
183 | ||
4be44fcd | 184 | struct acpi_thread_state *acpi_ut_create_thread_state(void) |
73459f73 | 185 | { |
4be44fcd | 186 | union acpi_generic_state *state; |
73459f73 | 187 | |
b229cf92 | 188 | ACPI_FUNCTION_TRACE(ut_create_thread_state); |
73459f73 RM |
189 | |
190 | /* Create the generic state object */ | |
191 | ||
4be44fcd | 192 | state = acpi_ut_create_generic_state(); |
73459f73 | 193 | if (!state) { |
4be44fcd | 194 | return_PTR(NULL); |
73459f73 RM |
195 | } |
196 | ||
197 | /* Init fields specific to the update struct */ | |
198 | ||
61686124 | 199 | state->common.descriptor_type = ACPI_DESC_TYPE_STATE_THREAD; |
4be44fcd | 200 | state->thread.thread_id = acpi_os_get_thread_id(); |
73459f73 | 201 | |
4be44fcd | 202 | return_PTR((struct acpi_thread_state *)state); |
73459f73 RM |
203 | } |
204 | ||
73459f73 RM |
205 | /******************************************************************************* |
206 | * | |
207 | * FUNCTION: acpi_ut_create_update_state | |
208 | * | |
209 | * PARAMETERS: Object - Initial Object to be installed in the state | |
210 | * Action - Update action to be performed | |
211 | * | |
212 | * RETURN: New state object, null on failure | |
213 | * | |
214 | * DESCRIPTION: Create an "Update State" - a flavor of the generic state used | |
215 | * to update reference counts and delete complex objects such | |
216 | * as packages. | |
217 | * | |
218 | ******************************************************************************/ | |
219 | ||
4be44fcd LB |
220 | union acpi_generic_state *acpi_ut_create_update_state(union acpi_operand_object |
221 | *object, u16 action) | |
73459f73 | 222 | { |
4be44fcd | 223 | union acpi_generic_state *state; |
73459f73 | 224 | |
b229cf92 | 225 | ACPI_FUNCTION_TRACE_PTR(ut_create_update_state, object); |
73459f73 RM |
226 | |
227 | /* Create the generic state object */ | |
228 | ||
4be44fcd | 229 | state = acpi_ut_create_generic_state(); |
73459f73 | 230 | if (!state) { |
4be44fcd | 231 | return_PTR(NULL); |
73459f73 RM |
232 | } |
233 | ||
234 | /* Init fields specific to the update struct */ | |
235 | ||
61686124 | 236 | state->common.descriptor_type = ACPI_DESC_TYPE_STATE_UPDATE; |
73459f73 | 237 | state->update.object = object; |
4be44fcd | 238 | state->update.value = action; |
73459f73 | 239 | |
4be44fcd | 240 | return_PTR(state); |
73459f73 RM |
241 | } |
242 | ||
73459f73 RM |
243 | /******************************************************************************* |
244 | * | |
245 | * FUNCTION: acpi_ut_create_pkg_state | |
246 | * | |
247 | * PARAMETERS: Object - Initial Object to be installed in the state | |
248 | * Action - Update action to be performed | |
249 | * | |
250 | * RETURN: New state object, null on failure | |
251 | * | |
252 | * DESCRIPTION: Create a "Package State" | |
253 | * | |
254 | ******************************************************************************/ | |
255 | ||
4be44fcd LB |
256 | union acpi_generic_state *acpi_ut_create_pkg_state(void *internal_object, |
257 | void *external_object, | |
258 | u16 index) | |
73459f73 | 259 | { |
4be44fcd | 260 | union acpi_generic_state *state; |
73459f73 | 261 | |
b229cf92 | 262 | ACPI_FUNCTION_TRACE_PTR(ut_create_pkg_state, internal_object); |
73459f73 RM |
263 | |
264 | /* Create the generic state object */ | |
265 | ||
4be44fcd | 266 | state = acpi_ut_create_generic_state(); |
73459f73 | 267 | if (!state) { |
4be44fcd | 268 | return_PTR(NULL); |
73459f73 RM |
269 | } |
270 | ||
271 | /* Init fields specific to the update struct */ | |
272 | ||
61686124 | 273 | state->common.descriptor_type = ACPI_DESC_TYPE_STATE_PACKAGE; |
4be44fcd LB |
274 | state->pkg.source_object = (union acpi_operand_object *)internal_object; |
275 | state->pkg.dest_object = external_object; | |
276 | state->pkg.index = index; | |
73459f73 RM |
277 | state->pkg.num_packages = 1; |
278 | ||
4be44fcd | 279 | return_PTR(state); |
73459f73 RM |
280 | } |
281 | ||
73459f73 RM |
282 | /******************************************************************************* |
283 | * | |
284 | * FUNCTION: acpi_ut_create_control_state | |
285 | * | |
286 | * PARAMETERS: None | |
287 | * | |
288 | * RETURN: New state object, null on failure | |
289 | * | |
290 | * DESCRIPTION: Create a "Control State" - a flavor of the generic state used | |
291 | * to support nested IF/WHILE constructs in the AML. | |
292 | * | |
293 | ******************************************************************************/ | |
294 | ||
4be44fcd | 295 | union acpi_generic_state *acpi_ut_create_control_state(void) |
73459f73 | 296 | { |
4be44fcd | 297 | union acpi_generic_state *state; |
73459f73 | 298 | |
b229cf92 | 299 | ACPI_FUNCTION_TRACE(ut_create_control_state); |
73459f73 RM |
300 | |
301 | /* Create the generic state object */ | |
302 | ||
4be44fcd | 303 | state = acpi_ut_create_generic_state(); |
73459f73 | 304 | if (!state) { |
4be44fcd | 305 | return_PTR(NULL); |
73459f73 RM |
306 | } |
307 | ||
308 | /* Init fields specific to the control struct */ | |
309 | ||
61686124 | 310 | state->common.descriptor_type = ACPI_DESC_TYPE_STATE_CONTROL; |
4be44fcd | 311 | state->common.state = ACPI_CONTROL_CONDITIONAL_EXECUTING; |
73459f73 | 312 | |
4be44fcd | 313 | return_PTR(state); |
73459f73 RM |
314 | } |
315 | ||
73459f73 RM |
316 | /******************************************************************************* |
317 | * | |
318 | * FUNCTION: acpi_ut_delete_generic_state | |
319 | * | |
320 | * PARAMETERS: State - The state object to be deleted | |
321 | * | |
322 | * RETURN: None | |
323 | * | |
793c2388 BM |
324 | * DESCRIPTION: Release a state object to the state cache. NULL state objects |
325 | * are ignored. | |
73459f73 RM |
326 | * |
327 | ******************************************************************************/ | |
328 | ||
4be44fcd | 329 | void acpi_ut_delete_generic_state(union acpi_generic_state *state) |
73459f73 | 330 | { |
b229cf92 | 331 | ACPI_FUNCTION_TRACE(ut_delete_generic_state); |
73459f73 | 332 | |
793c2388 BM |
333 | /* Ignore null state */ |
334 | ||
335 | if (state) { | |
336 | (void)acpi_os_release_object(acpi_gbl_state_cache, state); | |
337 | } | |
73459f73 RM |
338 | return_VOID; |
339 | } |