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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: pstree - Parser op tree manipulation/traversal/search | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acparser.h" | |
47 | #include "amlcode.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_PARSER | |
4be44fcd | 50 | ACPI_MODULE_NAME("pstree") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
4be44fcd | 54 | union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op); |
44f6c012 RM |
55 | #endif |
56 | ||
1da177e4 LT |
57 | /******************************************************************************* |
58 | * | |
59 | * FUNCTION: acpi_ps_get_arg | |
60 | * | |
ba494bee BM |
61 | * PARAMETERS: op - Get an argument for this op |
62 | * argn - Nth argument to get | |
1da177e4 | 63 | * |
44f6c012 | 64 | * RETURN: The argument (as an Op object). NULL if argument does not exist |
1da177e4 LT |
65 | * |
66 | * DESCRIPTION: Get the specified op's argument. | |
67 | * | |
68 | ******************************************************************************/ | |
69 | ||
4be44fcd | 70 | union acpi_parse_object *acpi_ps_get_arg(union acpi_parse_object *op, u32 argn) |
1da177e4 | 71 | { |
4be44fcd LB |
72 | union acpi_parse_object *arg = NULL; |
73 | const struct acpi_opcode_info *op_info; | |
1da177e4 | 74 | |
4be44fcd | 75 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 76 | |
9ce81784 BM |
77 | /* |
78 | if (Op->Common.aml_opcode == AML_INT_CONNECTION_OP) | |
79 | { | |
80 | return (Op->Common.Value.Arg); | |
81 | } | |
82 | */ | |
1da177e4 LT |
83 | /* Get the info structure for this opcode */ |
84 | ||
4be44fcd | 85 | op_info = acpi_ps_get_opcode_info(op->common.aml_opcode); |
1da177e4 | 86 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 87 | |
1da177e4 LT |
88 | /* Invalid opcode or ASCII character */ |
89 | ||
90 | return (NULL); | |
91 | } | |
92 | ||
93 | /* Check if this opcode requires argument sub-objects */ | |
94 | ||
95 | if (!(op_info->flags & AML_HAS_ARGS)) { | |
52fc0b02 | 96 | |
1da177e4 LT |
97 | /* Has no linked argument objects */ |
98 | ||
99 | return (NULL); | |
100 | } | |
101 | ||
102 | /* Get the requested argument object */ | |
103 | ||
104 | arg = op->common.value.arg; | |
105 | while (arg && argn) { | |
106 | argn--; | |
107 | arg = arg->common.next; | |
108 | } | |
109 | ||
110 | return (arg); | |
111 | } | |
112 | ||
1da177e4 LT |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_ps_append_arg | |
116 | * | |
ba494bee BM |
117 | * PARAMETERS: op - Append an argument to this Op. |
118 | * arg - Argument Op to append | |
1da177e4 LT |
119 | * |
120 | * RETURN: None. | |
121 | * | |
122 | * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK) | |
123 | * | |
124 | ******************************************************************************/ | |
125 | ||
126 | void | |
4be44fcd | 127 | acpi_ps_append_arg(union acpi_parse_object *op, union acpi_parse_object *arg) |
1da177e4 | 128 | { |
4be44fcd LB |
129 | union acpi_parse_object *prev_arg; |
130 | const struct acpi_opcode_info *op_info; | |
1da177e4 | 131 | |
4be44fcd | 132 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
133 | |
134 | if (!op) { | |
135 | return; | |
136 | } | |
137 | ||
138 | /* Get the info structure for this opcode */ | |
139 | ||
4be44fcd | 140 | op_info = acpi_ps_get_opcode_info(op->common.aml_opcode); |
1da177e4 | 141 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 142 | |
1da177e4 LT |
143 | /* Invalid opcode */ |
144 | ||
b8e4d893 BM |
145 | ACPI_ERROR((AE_INFO, "Invalid AML Opcode: 0x%2.2X", |
146 | op->common.aml_opcode)); | |
1da177e4 LT |
147 | return; |
148 | } | |
149 | ||
150 | /* Check if this opcode requires argument sub-objects */ | |
151 | ||
152 | if (!(op_info->flags & AML_HAS_ARGS)) { | |
52fc0b02 | 153 | |
1da177e4 LT |
154 | /* Has no linked argument objects */ |
155 | ||
156 | return; | |
157 | } | |
158 | ||
1da177e4 LT |
159 | /* Append the argument to the linked argument list */ |
160 | ||
161 | if (op->common.value.arg) { | |
52fc0b02 | 162 | |
1da177e4 LT |
163 | /* Append to existing argument list */ |
164 | ||
165 | prev_arg = op->common.value.arg; | |
166 | while (prev_arg->common.next) { | |
167 | prev_arg = prev_arg->common.next; | |
168 | } | |
169 | prev_arg->common.next = arg; | |
4be44fcd | 170 | } else { |
1da177e4 LT |
171 | /* No argument list, this will be the first argument */ |
172 | ||
173 | op->common.value.arg = arg; | |
174 | } | |
175 | ||
1da177e4 LT |
176 | /* Set the parent in this arg and any args linked after it */ |
177 | ||
178 | while (arg) { | |
179 | arg->common.parent = op; | |
180 | arg = arg->common.next; | |
4e3156b1 BM |
181 | |
182 | op->common.arg_list_length++; | |
1da177e4 LT |
183 | } |
184 | } | |
185 | ||
1da177e4 LT |
186 | /******************************************************************************* |
187 | * | |
188 | * FUNCTION: acpi_ps_get_depth_next | |
189 | * | |
ba494bee BM |
190 | * PARAMETERS: origin - Root of subtree to search |
191 | * op - Last (previous) Op that was found | |
1da177e4 LT |
192 | * |
193 | * RETURN: Next Op found in the search. | |
194 | * | |
195 | * DESCRIPTION: Get next op in tree (walking the tree in depth-first order) | |
196 | * Return NULL when reaching "origin" or when walking up from root | |
197 | * | |
198 | ******************************************************************************/ | |
199 | ||
4be44fcd LB |
200 | union acpi_parse_object *acpi_ps_get_depth_next(union acpi_parse_object *origin, |
201 | union acpi_parse_object *op) | |
1da177e4 | 202 | { |
4be44fcd LB |
203 | union acpi_parse_object *next = NULL; |
204 | union acpi_parse_object *parent; | |
205 | union acpi_parse_object *arg; | |
1da177e4 | 206 | |
4be44fcd | 207 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
208 | |
209 | if (!op) { | |
210 | return (NULL); | |
211 | } | |
212 | ||
44f6c012 | 213 | /* Look for an argument or child */ |
1da177e4 | 214 | |
4be44fcd | 215 | next = acpi_ps_get_arg(op, 0); |
1da177e4 LT |
216 | if (next) { |
217 | return (next); | |
218 | } | |
219 | ||
44f6c012 | 220 | /* Look for a sibling */ |
1da177e4 LT |
221 | |
222 | next = op->common.next; | |
223 | if (next) { | |
224 | return (next); | |
225 | } | |
226 | ||
44f6c012 | 227 | /* Look for a sibling of parent */ |
1da177e4 LT |
228 | |
229 | parent = op->common.parent; | |
230 | ||
231 | while (parent) { | |
4be44fcd | 232 | arg = acpi_ps_get_arg(parent, 0); |
1da177e4 LT |
233 | while (arg && (arg != origin) && (arg != op)) { |
234 | arg = arg->common.next; | |
235 | } | |
236 | ||
237 | if (arg == origin) { | |
52fc0b02 | 238 | |
44f6c012 | 239 | /* Reached parent of origin, end search */ |
1da177e4 LT |
240 | |
241 | return (NULL); | |
242 | } | |
243 | ||
244 | if (parent->common.next) { | |
52fc0b02 | 245 | |
44f6c012 | 246 | /* Found sibling of parent */ |
1da177e4 LT |
247 | |
248 | return (parent->common.next); | |
249 | } | |
250 | ||
251 | op = parent; | |
252 | parent = parent->common.parent; | |
253 | } | |
254 | ||
255 | return (next); | |
256 | } | |
257 | ||
44f6c012 RM |
258 | #ifdef ACPI_OBSOLETE_FUNCTIONS |
259 | /******************************************************************************* | |
260 | * | |
261 | * FUNCTION: acpi_ps_get_child | |
262 | * | |
ba494bee | 263 | * PARAMETERS: op - Get the child of this Op |
44f6c012 RM |
264 | * |
265 | * RETURN: Child Op, Null if none is found. | |
266 | * | |
267 | * DESCRIPTION: Get op's children or NULL if none | |
268 | * | |
269 | ******************************************************************************/ | |
270 | ||
4be44fcd | 271 | union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op) |
44f6c012 | 272 | { |
4be44fcd | 273 | union acpi_parse_object *child = NULL; |
44f6c012 | 274 | |
4be44fcd | 275 | ACPI_FUNCTION_ENTRY(); |
44f6c012 RM |
276 | |
277 | switch (op->common.aml_opcode) { | |
278 | case AML_SCOPE_OP: | |
279 | case AML_ELSE_OP: | |
280 | case AML_DEVICE_OP: | |
281 | case AML_THERMAL_ZONE_OP: | |
282 | case AML_INT_METHODCALL_OP: | |
283 | ||
4be44fcd | 284 | child = acpi_ps_get_arg(op, 0); |
44f6c012 RM |
285 | break; |
286 | ||
44f6c012 RM |
287 | case AML_BUFFER_OP: |
288 | case AML_PACKAGE_OP: | |
289 | case AML_METHOD_OP: | |
290 | case AML_IF_OP: | |
291 | case AML_WHILE_OP: | |
292 | case AML_FIELD_OP: | |
293 | ||
4be44fcd | 294 | child = acpi_ps_get_arg(op, 1); |
44f6c012 RM |
295 | break; |
296 | ||
44f6c012 RM |
297 | case AML_POWER_RES_OP: |
298 | case AML_INDEX_FIELD_OP: | |
299 | ||
4be44fcd | 300 | child = acpi_ps_get_arg(op, 2); |
44f6c012 RM |
301 | break; |
302 | ||
44f6c012 RM |
303 | case AML_PROCESSOR_OP: |
304 | case AML_BANK_FIELD_OP: | |
305 | ||
4be44fcd | 306 | child = acpi_ps_get_arg(op, 3); |
44f6c012 RM |
307 | break; |
308 | ||
44f6c012 | 309 | default: |
1d1ea1b7 | 310 | |
44f6c012 | 311 | /* All others have no children */ |
1d1ea1b7 | 312 | |
44f6c012 RM |
313 | break; |
314 | } | |
315 | ||
316 | return (child); | |
317 | } | |
318 | #endif |