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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsparse - namespace interface to AML parser | |
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 "acnamesp.h" | |
47 | #include "acparser.h" | |
48 | #include "acdispat.h" | |
49 | #include "actables.h" | |
74f51b80 | 50 | #include "acinterp.h" |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_NAMESPACE |
4be44fcd | 53 | ACPI_MODULE_NAME("nsparse") |
1da177e4 | 54 | |
de56ba95 LZ |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: ns_execute_table | |
58 | * | |
59 | * PARAMETERS: table_desc - An ACPI table descriptor for table to parse | |
60 | * start_node - Where to enter the table into the namespace | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
64 | * DESCRIPTION: Load ACPI/AML table by executing the entire table as a | |
65 | * term_list. | |
66 | * | |
67 | ******************************************************************************/ | |
68 | acpi_status | |
69 | acpi_ns_execute_table(u32 table_index, struct acpi_namespace_node *start_node) | |
70 | { | |
71 | acpi_status status; | |
72 | struct acpi_table_header *table; | |
73 | acpi_owner_id owner_id; | |
74 | struct acpi_evaluate_info *info = NULL; | |
75 | u32 aml_length; | |
76 | u8 *aml_start; | |
77 | union acpi_operand_object *method_obj = NULL; | |
78 | ||
79 | ACPI_FUNCTION_TRACE(ns_execute_table); | |
80 | ||
81 | status = acpi_get_table_by_index(table_index, &table); | |
82 | if (ACPI_FAILURE(status)) { | |
83 | return_ACPI_STATUS(status); | |
84 | } | |
85 | ||
86 | /* Table must consist of at least a complete header */ | |
87 | ||
88 | if (table->length < sizeof(struct acpi_table_header)) { | |
89 | return_ACPI_STATUS(AE_BAD_HEADER); | |
90 | } | |
91 | ||
92 | aml_start = (u8 *)table + sizeof(struct acpi_table_header); | |
93 | aml_length = table->length - sizeof(struct acpi_table_header); | |
94 | ||
95 | status = acpi_tb_get_owner_id(table_index, &owner_id); | |
96 | if (ACPI_FAILURE(status)) { | |
97 | return_ACPI_STATUS(status); | |
98 | } | |
99 | ||
100 | /* Create, initialize, and link a new temporary method object */ | |
101 | ||
102 | method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); | |
103 | if (!method_obj) { | |
104 | return_ACPI_STATUS(AE_NO_MEMORY); | |
105 | } | |
106 | ||
107 | /* Allocate the evaluation information block */ | |
108 | ||
109 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
110 | if (!info) { | |
111 | status = AE_NO_MEMORY; | |
112 | goto cleanup; | |
113 | } | |
114 | ||
115 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, | |
116 | "Create table code block: %p\n", method_obj)); | |
117 | ||
118 | method_obj->method.aml_start = aml_start; | |
119 | method_obj->method.aml_length = aml_length; | |
120 | method_obj->method.owner_id = owner_id; | |
121 | method_obj->method.info_flags |= ACPI_METHOD_MODULE_LEVEL; | |
122 | ||
123 | info->pass_number = ACPI_IMODE_EXECUTE; | |
124 | info->node = start_node; | |
125 | info->obj_desc = method_obj; | |
126 | info->node_flags = info->node->flags; | |
127 | info->full_pathname = acpi_ns_get_normalized_pathname(info->node, TRUE); | |
128 | if (!info->full_pathname) { | |
129 | status = AE_NO_MEMORY; | |
130 | goto cleanup; | |
131 | } | |
132 | ||
133 | status = acpi_ps_execute_table(info); | |
134 | ||
135 | cleanup: | |
136 | if (info) { | |
137 | ACPI_FREE(info->full_pathname); | |
138 | info->full_pathname = NULL; | |
139 | } | |
140 | ACPI_FREE(info); | |
141 | acpi_ut_remove_reference(method_obj); | |
142 | return_ACPI_STATUS(status); | |
143 | } | |
144 | ||
1da177e4 LT |
145 | /******************************************************************************* |
146 | * | |
147 | * FUNCTION: ns_one_complete_parse | |
148 | * | |
149 | * PARAMETERS: pass_number - 1 or 2 | |
150 | * table_desc - The table to be parsed. | |
151 | * | |
152 | * RETURN: Status | |
153 | * | |
154 | * DESCRIPTION: Perform one complete parse of an ACPI/AML table. | |
155 | * | |
156 | ******************************************************************************/ | |
de56ba95 | 157 | |
1da177e4 | 158 | acpi_status |
67a119f9 BM |
159 | acpi_ns_one_complete_parse(u32 pass_number, |
160 | u32 table_index, | |
161 | struct acpi_namespace_node *start_node) | |
1da177e4 | 162 | { |
4be44fcd LB |
163 | union acpi_parse_object *parse_root; |
164 | acpi_status status; | |
eb87a052 | 165 | u32 aml_length; |
f3d2e786 | 166 | u8 *aml_start; |
4be44fcd | 167 | struct acpi_walk_state *walk_state; |
f3d2e786 BM |
168 | struct acpi_table_header *table; |
169 | acpi_owner_id owner_id; | |
1da177e4 | 170 | |
b229cf92 | 171 | ACPI_FUNCTION_TRACE(ns_one_complete_parse); |
1da177e4 | 172 | |
62eb935b LZ |
173 | status = acpi_get_table_by_index(table_index, &table); |
174 | if (ACPI_FAILURE(status)) { | |
175 | return_ACPI_STATUS(status); | |
176 | } | |
177 | ||
178 | /* Table must consist of at least a complete header */ | |
179 | ||
180 | if (table->length < sizeof(struct acpi_table_header)) { | |
181 | return_ACPI_STATUS(AE_BAD_HEADER); | |
182 | } | |
183 | ||
184 | aml_start = (u8 *)table + sizeof(struct acpi_table_header); | |
185 | aml_length = table->length - sizeof(struct acpi_table_header); | |
186 | ||
f3d2e786 BM |
187 | status = acpi_tb_get_owner_id(table_index, &owner_id); |
188 | if (ACPI_FAILURE(status)) { | |
189 | return_ACPI_STATUS(status); | |
190 | } | |
191 | ||
1da177e4 LT |
192 | /* Create and init a Root Node */ |
193 | ||
62eb935b | 194 | parse_root = acpi_ps_create_scope_op(aml_start); |
1da177e4 | 195 | if (!parse_root) { |
4be44fcd | 196 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
197 | } |
198 | ||
199 | /* Create and initialize a new walk state */ | |
200 | ||
f3d2e786 | 201 | walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL); |
1da177e4 | 202 | if (!walk_state) { |
4be44fcd LB |
203 | acpi_ps_free_op(parse_root); |
204 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
205 | } |
206 | ||
62eb935b LZ |
207 | status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL, |
208 | aml_start, aml_length, NULL, | |
209 | (u8)pass_number); | |
f3d2e786 BM |
210 | if (ACPI_FAILURE(status)) { |
211 | acpi_ds_delete_walk_state(walk_state); | |
62eb935b | 212 | goto cleanup; |
f3d2e786 BM |
213 | } |
214 | ||
fe536995 BM |
215 | /* Found OSDT table, enable the namespace override feature */ |
216 | ||
217 | if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_OSDT) && | |
218 | pass_number == ACPI_IMODE_LOAD_PASS1) { | |
219 | walk_state->namespace_override = TRUE; | |
220 | } | |
221 | ||
7f4ac9f9 BM |
222 | /* start_node is the default location to load the table */ |
223 | ||
224 | if (start_node && start_node != acpi_gbl_root_node) { | |
1d18c058 BM |
225 | status = |
226 | acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD, | |
227 | walk_state); | |
228 | if (ACPI_FAILURE(status)) { | |
229 | acpi_ds_delete_walk_state(walk_state); | |
230 | goto cleanup; | |
231 | } | |
7f4ac9f9 BM |
232 | } |
233 | ||
1da177e4 LT |
234 | /* Parse the AML */ |
235 | ||
1fad8738 BM |
236 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
237 | "*PARSE* pass %u parse\n", pass_number)); | |
74f51b80 | 238 | acpi_ex_enter_interpreter(); |
4be44fcd | 239 | status = acpi_ps_parse_aml(walk_state); |
74f51b80 | 240 | acpi_ex_exit_interpreter(); |
1da177e4 | 241 | |
10622bf8 | 242 | cleanup: |
4be44fcd LB |
243 | acpi_ps_delete_parse_tree(parse_root); |
244 | return_ACPI_STATUS(status); | |
1da177e4 LT |
245 | } |
246 | ||
1da177e4 LT |
247 | /******************************************************************************* |
248 | * | |
249 | * FUNCTION: acpi_ns_parse_table | |
250 | * | |
251 | * PARAMETERS: table_desc - An ACPI table descriptor for table to parse | |
252 | * start_node - Where to enter the table into the namespace | |
253 | * | |
254 | * RETURN: Status | |
255 | * | |
256 | * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops | |
257 | * | |
258 | ******************************************************************************/ | |
259 | ||
260 | acpi_status | |
67a119f9 | 261 | acpi_ns_parse_table(u32 table_index, struct acpi_namespace_node *start_node) |
1da177e4 | 262 | { |
4be44fcd | 263 | acpi_status status; |
1da177e4 | 264 | |
b229cf92 | 265 | ACPI_FUNCTION_TRACE(ns_parse_table); |
1da177e4 | 266 | |
de56ba95 LZ |
267 | if (acpi_gbl_parse_table_as_term_list) { |
268 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start load pass\n")); | |
1da177e4 | 269 | |
de56ba95 LZ |
270 | status = acpi_ns_execute_table(table_index, start_node); |
271 | if (ACPI_FAILURE(status)) { | |
272 | return_ACPI_STATUS(status); | |
273 | } | |
274 | } else { | |
275 | /* | |
276 | * AML Parse, pass 1 | |
277 | * | |
278 | * In this pass, we load most of the namespace. Control methods | |
279 | * are not parsed until later. A parse tree is not created. | |
280 | * Instead, each Parser Op subtree is deleted when it is finished. | |
281 | * This saves a great deal of memory, and allows a small cache of | |
282 | * parse objects to service the entire parse. The second pass of | |
283 | * the parse then performs another complete parse of the AML. | |
284 | */ | |
285 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 1\n")); | |
286 | ||
287 | status = acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS1, | |
288 | table_index, start_node); | |
289 | if (ACPI_FAILURE(status)) { | |
290 | return_ACPI_STATUS(status); | |
291 | } | |
292 | ||
293 | /* | |
294 | * AML Parse, pass 2 | |
295 | * | |
296 | * In this pass, we resolve forward references and other things | |
297 | * that could not be completed during the first pass. | |
298 | * Another complete parse of the AML is performed, but the | |
299 | * overhead of this is compensated for by the fact that the | |
300 | * parse objects are all cached. | |
301 | */ | |
302 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 2\n")); | |
303 | status = acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS2, | |
304 | table_index, start_node); | |
305 | if (ACPI_FAILURE(status)) { | |
306 | return_ACPI_STATUS(status); | |
307 | } | |
1da177e4 LT |
308 | } |
309 | ||
4be44fcd | 310 | return_ACPI_STATUS(status); |
1da177e4 | 311 | } |