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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: pstree - Parser op tree manipulation/traversal/search | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
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/acparser.h> | |
46 | #include <acpi/amlcode.h> | |
47 | ||
48 | #define _COMPONENT ACPI_PARSER | |
4be44fcd | 49 | ACPI_MODULE_NAME("pstree") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
4be44fcd | 53 | union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op); |
44f6c012 RM |
54 | #endif |
55 | ||
1da177e4 LT |
56 | /******************************************************************************* |
57 | * | |
58 | * FUNCTION: acpi_ps_get_arg | |
59 | * | |
60 | * PARAMETERS: Op - Get an argument for this op | |
61 | * Argn - Nth argument to get | |
62 | * | |
44f6c012 | 63 | * RETURN: The argument (as an Op object). NULL if argument does not exist |
1da177e4 LT |
64 | * |
65 | * DESCRIPTION: Get the specified op's argument. | |
66 | * | |
67 | ******************************************************************************/ | |
68 | ||
4be44fcd | 69 | union acpi_parse_object *acpi_ps_get_arg(union acpi_parse_object *op, u32 argn) |
1da177e4 | 70 | { |
4be44fcd LB |
71 | union acpi_parse_object *arg = NULL; |
72 | const struct acpi_opcode_info *op_info; | |
1da177e4 | 73 | |
4be44fcd | 74 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
75 | |
76 | /* Get the info structure for this opcode */ | |
77 | ||
4be44fcd | 78 | op_info = acpi_ps_get_opcode_info(op->common.aml_opcode); |
1da177e4 | 79 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 80 | |
1da177e4 LT |
81 | /* Invalid opcode or ASCII character */ |
82 | ||
83 | return (NULL); | |
84 | } | |
85 | ||
86 | /* Check if this opcode requires argument sub-objects */ | |
87 | ||
88 | if (!(op_info->flags & AML_HAS_ARGS)) { | |
52fc0b02 | 89 | |
1da177e4 LT |
90 | /* Has no linked argument objects */ |
91 | ||
92 | return (NULL); | |
93 | } | |
94 | ||
95 | /* Get the requested argument object */ | |
96 | ||
97 | arg = op->common.value.arg; | |
98 | while (arg && argn) { | |
99 | argn--; | |
100 | arg = arg->common.next; | |
101 | } | |
102 | ||
103 | return (arg); | |
104 | } | |
105 | ||
1da177e4 LT |
106 | /******************************************************************************* |
107 | * | |
108 | * FUNCTION: acpi_ps_append_arg | |
109 | * | |
110 | * PARAMETERS: Op - Append an argument to this Op. | |
111 | * Arg - Argument Op to append | |
112 | * | |
113 | * RETURN: None. | |
114 | * | |
115 | * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK) | |
116 | * | |
117 | ******************************************************************************/ | |
118 | ||
119 | void | |
4be44fcd | 120 | acpi_ps_append_arg(union acpi_parse_object *op, union acpi_parse_object *arg) |
1da177e4 | 121 | { |
4be44fcd LB |
122 | union acpi_parse_object *prev_arg; |
123 | const struct acpi_opcode_info *op_info; | |
1da177e4 | 124 | |
4be44fcd | 125 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
126 | |
127 | if (!op) { | |
128 | return; | |
129 | } | |
130 | ||
131 | /* Get the info structure for this opcode */ | |
132 | ||
4be44fcd | 133 | op_info = acpi_ps_get_opcode_info(op->common.aml_opcode); |
1da177e4 | 134 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 135 | |
1da177e4 LT |
136 | /* Invalid opcode */ |
137 | ||
b8e4d893 BM |
138 | ACPI_ERROR((AE_INFO, "Invalid AML Opcode: 0x%2.2X", |
139 | op->common.aml_opcode)); | |
1da177e4 LT |
140 | return; |
141 | } | |
142 | ||
143 | /* Check if this opcode requires argument sub-objects */ | |
144 | ||
145 | if (!(op_info->flags & AML_HAS_ARGS)) { | |
52fc0b02 | 146 | |
1da177e4 LT |
147 | /* Has no linked argument objects */ |
148 | ||
149 | return; | |
150 | } | |
151 | ||
1da177e4 LT |
152 | /* Append the argument to the linked argument list */ |
153 | ||
154 | if (op->common.value.arg) { | |
52fc0b02 | 155 | |
1da177e4 LT |
156 | /* Append to existing argument list */ |
157 | ||
158 | prev_arg = op->common.value.arg; | |
159 | while (prev_arg->common.next) { | |
160 | prev_arg = prev_arg->common.next; | |
161 | } | |
162 | prev_arg->common.next = arg; | |
4be44fcd | 163 | } else { |
1da177e4 LT |
164 | /* No argument list, this will be the first argument */ |
165 | ||
166 | op->common.value.arg = arg; | |
167 | } | |
168 | ||
1da177e4 LT |
169 | /* Set the parent in this arg and any args linked after it */ |
170 | ||
171 | while (arg) { | |
172 | arg->common.parent = op; | |
173 | arg = arg->common.next; | |
4e3156b1 BM |
174 | |
175 | op->common.arg_list_length++; | |
1da177e4 LT |
176 | } |
177 | } | |
178 | ||
1da177e4 | 179 | #ifdef ACPI_FUTURE_USAGE |
1da177e4 LT |
180 | /******************************************************************************* |
181 | * | |
182 | * FUNCTION: acpi_ps_get_depth_next | |
183 | * | |
184 | * PARAMETERS: Origin - Root of subtree to search | |
185 | * Op - Last (previous) Op that was found | |
186 | * | |
187 | * RETURN: Next Op found in the search. | |
188 | * | |
189 | * DESCRIPTION: Get next op in tree (walking the tree in depth-first order) | |
190 | * Return NULL when reaching "origin" or when walking up from root | |
191 | * | |
192 | ******************************************************************************/ | |
193 | ||
4be44fcd LB |
194 | union acpi_parse_object *acpi_ps_get_depth_next(union acpi_parse_object *origin, |
195 | union acpi_parse_object *op) | |
1da177e4 | 196 | { |
4be44fcd LB |
197 | union acpi_parse_object *next = NULL; |
198 | union acpi_parse_object *parent; | |
199 | union acpi_parse_object *arg; | |
1da177e4 | 200 | |
4be44fcd | 201 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
202 | |
203 | if (!op) { | |
204 | return (NULL); | |
205 | } | |
206 | ||
44f6c012 | 207 | /* Look for an argument or child */ |
1da177e4 | 208 | |
4be44fcd | 209 | next = acpi_ps_get_arg(op, 0); |
1da177e4 LT |
210 | if (next) { |
211 | return (next); | |
212 | } | |
213 | ||
44f6c012 | 214 | /* Look for a sibling */ |
1da177e4 LT |
215 | |
216 | next = op->common.next; | |
217 | if (next) { | |
218 | return (next); | |
219 | } | |
220 | ||
44f6c012 | 221 | /* Look for a sibling of parent */ |
1da177e4 LT |
222 | |
223 | parent = op->common.parent; | |
224 | ||
225 | while (parent) { | |
4be44fcd | 226 | arg = acpi_ps_get_arg(parent, 0); |
1da177e4 LT |
227 | while (arg && (arg != origin) && (arg != op)) { |
228 | arg = arg->common.next; | |
229 | } | |
230 | ||
231 | if (arg == origin) { | |
52fc0b02 | 232 | |
44f6c012 | 233 | /* Reached parent of origin, end search */ |
1da177e4 LT |
234 | |
235 | return (NULL); | |
236 | } | |
237 | ||
238 | if (parent->common.next) { | |
52fc0b02 | 239 | |
44f6c012 | 240 | /* Found sibling of parent */ |
1da177e4 LT |
241 | |
242 | return (parent->common.next); | |
243 | } | |
244 | ||
245 | op = parent; | |
246 | parent = parent->common.parent; | |
247 | } | |
248 | ||
249 | return (next); | |
250 | } | |
251 | ||
44f6c012 RM |
252 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
253 | /******************************************************************************* | |
254 | * | |
255 | * FUNCTION: acpi_ps_get_child | |
256 | * | |
257 | * PARAMETERS: Op - Get the child of this Op | |
258 | * | |
259 | * RETURN: Child Op, Null if none is found. | |
260 | * | |
261 | * DESCRIPTION: Get op's children or NULL if none | |
262 | * | |
263 | ******************************************************************************/ | |
264 | ||
4be44fcd | 265 | union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op) |
44f6c012 | 266 | { |
4be44fcd | 267 | union acpi_parse_object *child = NULL; |
44f6c012 | 268 | |
4be44fcd | 269 | ACPI_FUNCTION_ENTRY(); |
44f6c012 RM |
270 | |
271 | switch (op->common.aml_opcode) { | |
272 | case AML_SCOPE_OP: | |
273 | case AML_ELSE_OP: | |
274 | case AML_DEVICE_OP: | |
275 | case AML_THERMAL_ZONE_OP: | |
276 | case AML_INT_METHODCALL_OP: | |
277 | ||
4be44fcd | 278 | child = acpi_ps_get_arg(op, 0); |
44f6c012 RM |
279 | break; |
280 | ||
44f6c012 RM |
281 | case AML_BUFFER_OP: |
282 | case AML_PACKAGE_OP: | |
283 | case AML_METHOD_OP: | |
284 | case AML_IF_OP: | |
285 | case AML_WHILE_OP: | |
286 | case AML_FIELD_OP: | |
287 | ||
4be44fcd | 288 | child = acpi_ps_get_arg(op, 1); |
44f6c012 RM |
289 | break; |
290 | ||
44f6c012 RM |
291 | case AML_POWER_RES_OP: |
292 | case AML_INDEX_FIELD_OP: | |
293 | ||
4be44fcd | 294 | child = acpi_ps_get_arg(op, 2); |
44f6c012 RM |
295 | break; |
296 | ||
44f6c012 RM |
297 | case AML_PROCESSOR_OP: |
298 | case AML_BANK_FIELD_OP: | |
299 | ||
4be44fcd | 300 | child = acpi_ps_get_arg(op, 3); |
44f6c012 RM |
301 | break; |
302 | ||
44f6c012 RM |
303 | default: |
304 | /* All others have no children */ | |
305 | break; | |
306 | } | |
307 | ||
308 | return (child); | |
309 | } | |
310 | #endif | |
4be44fcd | 311 | #endif /* ACPI_FUTURE_USAGE */ |