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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 | |
b229cf92 | 66 | ACPI_FUNCTION_NAME(ds_scope_stack_clear); |
1da177e4 LT |
67 | |
68 | while (walk_state->scope_info) { | |
52fc0b02 | 69 | |
1da177e4 LT |
70 | /* Pop a scope off the stack */ |
71 | ||
72 | scope_info = walk_state->scope_info; | |
73 | walk_state->scope_info = scope_info->scope.next; | |
74 | ||
4be44fcd LB |
75 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
76 | "Popped object type (%s)\n", | |
77 | acpi_ut_get_type_name(scope_info->common. | |
78 | value))); | |
79 | acpi_ut_delete_generic_state(scope_info); | |
1da177e4 LT |
80 | } |
81 | } | |
82 | ||
1da177e4 LT |
83 | /**************************************************************************** |
84 | * | |
85 | * FUNCTION: acpi_ds_scope_stack_push | |
86 | * | |
44f6c012 RM |
87 | * PARAMETERS: Node - Name to be made current |
88 | * Type - Type of frame being pushed | |
89 | * walk_state - Current state | |
90 | * | |
91 | * RETURN: Status | |
1da177e4 LT |
92 | * |
93 | * DESCRIPTION: Push the current scope on the scope stack, and make the | |
94 | * passed Node current. | |
95 | * | |
96 | ***************************************************************************/ | |
97 | ||
98 | acpi_status | |
4be44fcd LB |
99 | acpi_ds_scope_stack_push(struct acpi_namespace_node *node, |
100 | acpi_object_type type, | |
101 | struct acpi_walk_state *walk_state) | |
1da177e4 | 102 | { |
4be44fcd LB |
103 | union acpi_generic_state *scope_info; |
104 | union acpi_generic_state *old_scope_info; | |
1da177e4 | 105 | |
b229cf92 | 106 | ACPI_FUNCTION_TRACE(ds_scope_stack_push); |
1da177e4 LT |
107 | |
108 | if (!node) { | |
52fc0b02 | 109 | |
1da177e4 LT |
110 | /* Invalid scope */ |
111 | ||
b8e4d893 | 112 | ACPI_ERROR((AE_INFO, "Null scope parameter")); |
4be44fcd | 113 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
114 | } |
115 | ||
116 | /* Make sure object type is valid */ | |
117 | ||
4be44fcd | 118 | if (!acpi_ut_valid_object_type(type)) { |
b8e4d893 | 119 | ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type)); |
1da177e4 LT |
120 | } |
121 | ||
122 | /* Allocate a new scope object */ | |
123 | ||
4be44fcd | 124 | scope_info = acpi_ut_create_generic_state(); |
1da177e4 | 125 | if (!scope_info) { |
4be44fcd | 126 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
127 | } |
128 | ||
129 | /* Init new scope object */ | |
130 | ||
61686124 | 131 | scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE; |
4be44fcd LB |
132 | scope_info->scope.node = node; |
133 | scope_info->common.value = (u16) type; | |
1da177e4 LT |
134 | |
135 | walk_state->scope_depth++; | |
136 | ||
4be44fcd LB |
137 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
138 | "[%.2d] Pushed scope ", | |
139 | (u32) walk_state->scope_depth)); | |
1da177e4 LT |
140 | |
141 | old_scope_info = walk_state->scope_info; | |
142 | if (old_scope_info) { | |
4be44fcd LB |
143 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
144 | "[%4.4s] (%s)", | |
145 | acpi_ut_get_node_name(old_scope_info-> | |
146 | scope.node), | |
147 | acpi_ut_get_type_name(old_scope_info-> | |
148 | common.value))); | |
149 | } else { | |
150 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT")); | |
1da177e4 LT |
151 | } |
152 | ||
4be44fcd LB |
153 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
154 | ", New scope -> [%4.4s] (%s)\n", | |
155 | acpi_ut_get_node_name(scope_info->scope.node), | |
156 | acpi_ut_get_type_name(scope_info->common.value))); | |
1da177e4 LT |
157 | |
158 | /* Push new scope object onto stack */ | |
159 | ||
4be44fcd LB |
160 | acpi_ut_push_generic_state(&walk_state->scope_info, scope_info); |
161 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
162 | } |
163 | ||
1da177e4 LT |
164 | /**************************************************************************** |
165 | * | |
166 | * FUNCTION: acpi_ds_scope_stack_pop | |
167 | * | |
44f6c012 | 168 | * PARAMETERS: walk_state - Current state |
1da177e4 | 169 | * |
44f6c012 | 170 | * RETURN: Status |
1da177e4 | 171 | * |
44f6c012 | 172 | * DESCRIPTION: Pop the scope stack once. |
1da177e4 LT |
173 | * |
174 | ***************************************************************************/ | |
175 | ||
4be44fcd | 176 | acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state) |
1da177e4 | 177 | { |
4be44fcd LB |
178 | union acpi_generic_state *scope_info; |
179 | union acpi_generic_state *new_scope_info; | |
1da177e4 | 180 | |
b229cf92 | 181 | ACPI_FUNCTION_TRACE(ds_scope_stack_pop); |
1da177e4 LT |
182 | |
183 | /* | |
184 | * Pop scope info object off the stack. | |
185 | */ | |
4be44fcd | 186 | scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info); |
1da177e4 | 187 | if (!scope_info) { |
4be44fcd | 188 | return_ACPI_STATUS(AE_STACK_UNDERFLOW); |
1da177e4 LT |
189 | } |
190 | ||
191 | walk_state->scope_depth--; | |
192 | ||
4be44fcd LB |
193 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
194 | "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", | |
195 | (u32) walk_state->scope_depth, | |
196 | acpi_ut_get_node_name(scope_info->scope.node), | |
197 | acpi_ut_get_type_name(scope_info->common.value))); | |
1da177e4 LT |
198 | |
199 | new_scope_info = walk_state->scope_info; | |
200 | if (new_scope_info) { | |
4be44fcd LB |
201 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, |
202 | "[%4.4s] (%s)\n", | |
203 | acpi_ut_get_node_name(new_scope_info-> | |
204 | scope.node), | |
205 | acpi_ut_get_type_name(new_scope_info-> | |
206 | common.value))); | |
207 | } else { | |
208 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n")); | |
1da177e4 LT |
209 | } |
210 | ||
4be44fcd LB |
211 | acpi_ut_delete_generic_state(scope_info); |
212 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 213 | } |