blob: a2484556a6b5736c6cdacebcaa6477488fdd80cd (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
*
* Module Name: utstate - state object support procedures
*
******************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utstate")
/*******************************************************************************
*
* FUNCTION: acpi_ut_push_generic_state
*
* PARAMETERS: list_head - Head of the state stack
* state - State object to push
*
* RETURN: None
*
* DESCRIPTION: Push a state object onto a state stack
*
******************************************************************************/
void
acpi_ut_push_generic_state(union acpi_generic_state **list_head,
union acpi_generic_state *state)
{
ACPI_FUNCTION_ENTRY();
/* Push the state object onto the front of the list (stack) */
state->common.next = *list_head;
*list_head = state;
return;
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_pop_generic_state
*
* PARAMETERS: list_head - Head of the state stack
*
* RETURN: The popped state object
*
* DESCRIPTION: Pop a state object from a state stack
*
******************************************************************************/
union acpi_generic_state *acpi_ut_pop_generic_state(union acpi_generic_state
**list_head)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
/* Remove the state object at the head of the list (stack) */
state = *list_head;
if (state) {
/* Update the list head */
*list_head = state->common.next;
}
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_generic_state
*
* PARAMETERS: None
*
* RETURN: The new state object. NULL on failure.
*
* DESCRIPTION: Create a generic state object. Attempt to obtain one from
* the global state cache; If none available, create a new one.
*
******************************************************************************/
union acpi_generic_state *acpi_ut_create_generic_state(void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
state = acpi_os_acquire_object(acpi_gbl_state_cache);
if (state) {
/* Initialize */
state->common.descriptor_type = ACPI_DESC_TYPE_STATE;
}
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_thread_state
*
* PARAMETERS: None
*
* RETURN: New Thread State. NULL on failure
*
* DESCRIPTION: Create a "Thread State" - a flavor of the generic state used
* to track per-thread info during method execution
*
******************************************************************************/
struct acpi_thread_state *acpi_ut_create_thread_state(void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
/* Create the generic state object */
state = acpi_ut_create_generic_state();
if (!state) {
return (NULL);
}
/* Init fields specific to the update struct */
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_THREAD;
state->thread.thread_id = acpi_os_get_thread_id();
/* Check for invalid thread ID - zero is very bad, it will break things */
if (!state->thread.thread_id) {
ACPI_ERROR((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId"));
state->thread.thread_id = (acpi_thread_id) 1;
}
return ((struct acpi_thread_state *)state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_update_state
*
* PARAMETERS: object - Initial Object to be installed in the state
* action - Update action to be performed
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create an "Update State" - a flavor of the generic state used
* to update reference counts and delete complex objects such
* as packages.
*
******************************************************************************/
union acpi_generic_state *acpi_ut_create_update_state(union acpi_operand_object
*object, u16 action)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
/* Create the generic state object */
state = acpi_ut_create_generic_state();
if (!state) {
return (NULL);
}
/* Init fields specific to the update struct */
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_UPDATE;
state->update.object = object;
state->update.value = action;
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_pkg_state
*
* PARAMETERS: object - Initial Object to be installed in the state
* action - Update action to be performed
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create a "Package State"
*
******************************************************************************/
union acpi_generic_state *acpi_ut_create_pkg_state(void *internal_object,
void *external_object,
u32 index)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
/* Create the generic state object */
state = acpi_ut_create_generic_state();
if (!state) {
return (NULL);
}
/* Init fields specific to the update struct */
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_PACKAGE;
state->pkg.source_object = (union acpi_operand_object *)internal_object;
state->pkg.dest_object = external_object;
state->pkg.index = index;
state->pkg.num_packages = 1;
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_control_state
*
* PARAMETERS: None
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create a "Control State" - a flavor of the generic state used
* to support nested IF/WHILE constructs in the AML.
*
******************************************************************************/
union acpi_generic_state *acpi_ut_create_control_state(void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY();
/* Create the generic state object */
state = acpi_ut_create_generic_state();
if (!state) {
return (NULL);
}
/* Init fields specific to the control struct */
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_CONTROL;
state->common.state = ACPI_CONTROL_CONDITIONAL_EXECUTING;
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_delete_generic_state
*
* PARAMETERS: state - The state object to be deleted
*
* RETURN: None
*
* DESCRIPTION: Release a state object to the state cache. NULL state objects
* are ignored.
*
******************************************************************************/
void acpi_ut_delete_generic_state(union acpi_generic_state *state)
{
ACPI_FUNCTION_ENTRY();
/* Ignore null state */
if (state) {
(void)acpi_os_release_object(acpi_gbl_state_cache, state);
}
return;
}
|
