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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dswscope - Scope stack manipulation | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acdispat.h> | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_DISPATCHER |
4be44fcd | 48 | ACPI_MODULE_NAME("dswscope") |
1da177e4 | 49 | |
1da177e4 LT |
50 | /**************************************************************************** |
51 | * | |
52 | * FUNCTION: acpi_ds_scope_stack_clear | |
53 | * | |
44f6c012 RM |
54 | * PARAMETERS: walk_state - Current state |
55 | * | |
56 | * RETURN: None | |
1da177e4 LT |
57 | * |
58 | * DESCRIPTION: Pop (and free) everything on the scope stack except the | |
59 | * root scope object (which remains at the stack top.) | |
60 | * | |
61 | ***************************************************************************/ | |
4be44fcd | 62 | void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state) |
1da177e4 | 63 | { |
4be44fcd | 64 | union acpi_generic_state *scope_info; |
1da177e4 | 65 | |
4be44fcd | 66 | ACPI_FUNCTION_NAME("ds_scope_stack_clear"); |
1da177e4 LT |
67 | |
68 | while (walk_state->scope_info) { | |
69 | /* Pop a scope off the stack */ | |
70 | ||
71 | scope_info = walk_state->scope_info; | |
72 | walk_state->scope_info = scope_info->scope.next; | |
73 | ||
4be44fcd LB |
74 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
75 | "Popped object type (%s)\n", | |
76 | acpi_ut_get_type_name(scope_info->common. | |
77 | value))); | |
78 | acpi_ut_delete_generic_state(scope_info); | |
1da177e4 LT |
79 | } |
80 | } | |
81 | ||
1da177e4 LT |
82 | /**************************************************************************** |
83 | * | |
84 | * FUNCTION: acpi_ds_scope_stack_push | |
85 | * | |
44f6c012 RM |
86 | * PARAMETERS: Node - Name to be made current |
87 | * Type - Type of frame being pushed | |
88 | * walk_state - Current state | |
89 | * | |
90 | * RETURN: Status | |
1da177e4 LT |
91 | * |
92 | * DESCRIPTION: Push the current scope on the scope stack, and make the | |
93 | * passed Node current. | |
94 | * | |
95 | ***************************************************************************/ | |
96 | ||
97 | acpi_status | |
4be44fcd LB |
98 | acpi_ds_scope_stack_push(struct acpi_namespace_node *node, |
99 | acpi_object_type type, | |
100 | struct acpi_walk_state *walk_state) | |
1da177e4 | 101 | { |
4be44fcd LB |
102 | union acpi_generic_state *scope_info; |
103 | union acpi_generic_state *old_scope_info; | |
1da177e4 | 104 | |
4be44fcd | 105 | ACPI_FUNCTION_TRACE("ds_scope_stack_push"); |
1da177e4 LT |
106 | |
107 | if (!node) { | |
108 | /* Invalid scope */ | |
109 | ||
b8e4d893 | 110 | ACPI_ERROR((AE_INFO, "Null scope parameter")); |
4be44fcd | 111 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
112 | } |
113 | ||
114 | /* Make sure object type is valid */ | |
115 | ||
4be44fcd | 116 | if (!acpi_ut_valid_object_type(type)) { |
b8e4d893 | 117 | ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type)); |
1da177e4 LT |
118 | } |
119 | ||
120 | /* Allocate a new scope object */ | |
121 | ||
4be44fcd | 122 | scope_info = acpi_ut_create_generic_state(); |
1da177e4 | 123 | if (!scope_info) { |
4be44fcd | 124 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
125 | } |
126 | ||
127 | /* Init new scope object */ | |
128 | ||
129 | scope_info->common.data_type = ACPI_DESC_TYPE_STATE_WSCOPE; | |
4be44fcd LB |
130 | scope_info->scope.node = node; |
131 | scope_info->common.value = (u16) type; | |
1da177e4 LT |
132 | |
133 | walk_state->scope_depth++; | |
134 | ||
4be44fcd LB |
135 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
136 | "[%.2d] Pushed scope ", | |
137 | (u32) walk_state->scope_depth)); | |
1da177e4 LT |
138 | |
139 | old_scope_info = walk_state->scope_info; | |
140 | if (old_scope_info) { | |
4be44fcd LB |
141 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
142 | "[%4.4s] (%s)", | |
143 | acpi_ut_get_node_name(old_scope_info-> | |
144 | scope.node), | |
145 | acpi_ut_get_type_name(old_scope_info-> | |
146 | common.value))); | |
147 | } else { | |
148 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT")); | |
1da177e4 LT |
149 | } |
150 | ||
4be44fcd LB |
151 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
152 | ", New scope -> [%4.4s] (%s)\n", | |
153 | acpi_ut_get_node_name(scope_info->scope.node), | |
154 | acpi_ut_get_type_name(scope_info->common.value))); | |
1da177e4 LT |
155 | |
156 | /* Push new scope object onto stack */ | |
157 | ||
4be44fcd LB |
158 | acpi_ut_push_generic_state(&walk_state->scope_info, scope_info); |
159 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
160 | } |
161 | ||
1da177e4 LT |
162 | /**************************************************************************** |
163 | * | |
164 | * FUNCTION: acpi_ds_scope_stack_pop | |
165 | * | |
44f6c012 | 166 | * PARAMETERS: walk_state - Current state |
1da177e4 | 167 | * |
44f6c012 | 168 | * RETURN: Status |
1da177e4 | 169 | * |
44f6c012 | 170 | * DESCRIPTION: Pop the scope stack once. |
1da177e4 LT |
171 | * |
172 | ***************************************************************************/ | |
173 | ||
4be44fcd | 174 | acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state) |
1da177e4 | 175 | { |
4be44fcd LB |
176 | union acpi_generic_state *scope_info; |
177 | union acpi_generic_state *new_scope_info; | |
1da177e4 | 178 | |
4be44fcd | 179 | ACPI_FUNCTION_TRACE("ds_scope_stack_pop"); |
1da177e4 LT |
180 | |
181 | /* | |
182 | * Pop scope info object off the stack. | |
183 | */ | |
4be44fcd | 184 | scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info); |
1da177e4 | 185 | if (!scope_info) { |
4be44fcd | 186 | return_ACPI_STATUS(AE_STACK_UNDERFLOW); |
1da177e4 LT |
187 | } |
188 | ||
189 | walk_state->scope_depth--; | |
190 | ||
4be44fcd LB |
191 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
192 | "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", | |
193 | (u32) walk_state->scope_depth, | |
194 | acpi_ut_get_node_name(scope_info->scope.node), | |
195 | acpi_ut_get_type_name(scope_info->common.value))); | |
1da177e4 LT |
196 | |
197 | new_scope_info = walk_state->scope_info; | |
198 | if (new_scope_info) { | |
4be44fcd LB |
199 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
200 | "[%4.4s] (%s)\n", | |
201 | acpi_ut_get_node_name(new_scope_info-> | |
202 | scope.node), | |
203 | acpi_ut_get_type_name(new_scope_info-> | |
204 | common.value))); | |
205 | } else { | |
206 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n")); | |
1da177e4 LT |
207 | } |
208 | ||
4be44fcd LB |
209 | acpi_ut_delete_generic_state(scope_info); |
210 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 211 | } |