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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dswscope - Scope stack manipulation | |
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/acdispat.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_DISPATCHER | |
50 | ACPI_MODULE_NAME ("dswscope") | |
51 | ||
52 | ||
1da177e4 LT |
53 | /**************************************************************************** |
54 | * | |
55 | * FUNCTION: acpi_ds_scope_stack_clear | |
56 | * | |
44f6c012 RM |
57 | * PARAMETERS: walk_state - Current state |
58 | * | |
59 | * RETURN: None | |
1da177e4 LT |
60 | * |
61 | * DESCRIPTION: Pop (and free) everything on the scope stack except the | |
62 | * root scope object (which remains at the stack top.) | |
63 | * | |
64 | ***************************************************************************/ | |
65 | ||
66 | void | |
67 | acpi_ds_scope_stack_clear ( | |
68 | struct acpi_walk_state *walk_state) | |
69 | { | |
70 | union acpi_generic_state *scope_info; | |
71 | ||
72 | ACPI_FUNCTION_NAME ("ds_scope_stack_clear"); | |
73 | ||
74 | ||
75 | while (walk_state->scope_info) { | |
76 | /* Pop a scope off the stack */ | |
77 | ||
78 | scope_info = walk_state->scope_info; | |
79 | walk_state->scope_info = scope_info->scope.next; | |
80 | ||
81 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, | |
44f6c012 RM |
82 | "Popped object type (%s)\n", |
83 | acpi_ut_get_type_name (scope_info->common.value))); | |
1da177e4 LT |
84 | acpi_ut_delete_generic_state (scope_info); |
85 | } | |
86 | } | |
87 | ||
88 | ||
89 | /**************************************************************************** | |
90 | * | |
91 | * FUNCTION: acpi_ds_scope_stack_push | |
92 | * | |
44f6c012 RM |
93 | * PARAMETERS: Node - Name to be made current |
94 | * Type - Type of frame being pushed | |
95 | * walk_state - Current state | |
96 | * | |
97 | * RETURN: Status | |
1da177e4 LT |
98 | * |
99 | * DESCRIPTION: Push the current scope on the scope stack, and make the | |
100 | * passed Node current. | |
101 | * | |
102 | ***************************************************************************/ | |
103 | ||
104 | acpi_status | |
105 | acpi_ds_scope_stack_push ( | |
106 | struct acpi_namespace_node *node, | |
107 | acpi_object_type type, | |
108 | struct acpi_walk_state *walk_state) | |
109 | { | |
110 | union acpi_generic_state *scope_info; | |
111 | union acpi_generic_state *old_scope_info; | |
112 | ||
113 | ||
114 | ACPI_FUNCTION_TRACE ("ds_scope_stack_push"); | |
115 | ||
116 | ||
117 | if (!node) { | |
118 | /* Invalid scope */ | |
119 | ||
120 | ACPI_REPORT_ERROR (("ds_scope_stack_push: null scope passed\n")); | |
121 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
122 | } | |
123 | ||
124 | /* Make sure object type is valid */ | |
125 | ||
126 | if (!acpi_ut_valid_object_type (type)) { | |
44f6c012 RM |
127 | ACPI_REPORT_WARNING (( |
128 | "ds_scope_stack_push: Invalid object type: 0x%X\n", type)); | |
1da177e4 LT |
129 | } |
130 | ||
131 | /* Allocate a new scope object */ | |
132 | ||
133 | scope_info = acpi_ut_create_generic_state (); | |
134 | if (!scope_info) { | |
135 | return_ACPI_STATUS (AE_NO_MEMORY); | |
136 | } | |
137 | ||
138 | /* Init new scope object */ | |
139 | ||
140 | scope_info->common.data_type = ACPI_DESC_TYPE_STATE_WSCOPE; | |
141 | scope_info->scope.node = node; | |
142 | scope_info->common.value = (u16) type; | |
143 | ||
144 | walk_state->scope_depth++; | |
145 | ||
146 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, | |
147 | "[%.2d] Pushed scope ", (u32) walk_state->scope_depth)); | |
148 | ||
149 | old_scope_info = walk_state->scope_info; | |
150 | if (old_scope_info) { | |
151 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, | |
152 | "[%4.4s] (%s)", | |
153 | acpi_ut_get_node_name (old_scope_info->scope.node), | |
154 | acpi_ut_get_type_name (old_scope_info->common.value))); | |
155 | } | |
156 | else { | |
157 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, | |
158 | "[\\___] (%s)", "ROOT")); | |
159 | } | |
160 | ||
161 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, | |
162 | ", New scope -> [%4.4s] (%s)\n", | |
163 | acpi_ut_get_node_name (scope_info->scope.node), | |
164 | acpi_ut_get_type_name (scope_info->common.value))); | |
165 | ||
166 | /* Push new scope object onto stack */ | |
167 | ||
168 | acpi_ut_push_generic_state (&walk_state->scope_info, scope_info); | |
169 | return_ACPI_STATUS (AE_OK); | |
170 | } | |
171 | ||
172 | ||
173 | /**************************************************************************** | |
174 | * | |
175 | * FUNCTION: acpi_ds_scope_stack_pop | |
176 | * | |
44f6c012 | 177 | * PARAMETERS: walk_state - Current state |
1da177e4 | 178 | * |
44f6c012 | 179 | * RETURN: Status |
1da177e4 | 180 | * |
44f6c012 | 181 | * DESCRIPTION: Pop the scope stack once. |
1da177e4 LT |
182 | * |
183 | ***************************************************************************/ | |
184 | ||
185 | acpi_status | |
186 | acpi_ds_scope_stack_pop ( | |
187 | struct acpi_walk_state *walk_state) | |
188 | { | |
189 | union acpi_generic_state *scope_info; | |
190 | union acpi_generic_state *new_scope_info; | |
191 | ||
192 | ||
193 | ACPI_FUNCTION_TRACE ("ds_scope_stack_pop"); | |
194 | ||
195 | ||
196 | /* | |
197 | * Pop scope info object off the stack. | |
198 | */ | |
199 | scope_info = acpi_ut_pop_generic_state (&walk_state->scope_info); | |
200 | if (!scope_info) { | |
201 | return_ACPI_STATUS (AE_STACK_UNDERFLOW); | |
202 | } | |
203 | ||
204 | walk_state->scope_depth--; | |
205 | ||
206 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, | |
207 | "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", | |
208 | (u32) walk_state->scope_depth, | |
209 | acpi_ut_get_node_name (scope_info->scope.node), | |
210 | acpi_ut_get_type_name (scope_info->common.value))); | |
211 | ||
212 | new_scope_info = walk_state->scope_info; | |
213 | if (new_scope_info) { | |
214 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, | |
215 | "[%4.4s] (%s)\n", | |
216 | acpi_ut_get_node_name (new_scope_info->scope.node), | |
217 | acpi_ut_get_type_name (new_scope_info->common.value))); | |
218 | } | |
219 | else { | |
220 | ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, | |
221 | "[\\___] (ROOT)\n")); | |
222 | } | |
223 | ||
224 | acpi_ut_delete_generic_state (scope_info); | |
225 | return_ACPI_STATUS (AE_OK); | |
226 | } | |
227 | ||
228 |