Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: psxface - Parser external interfaces | |
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 "acdispat.h" | |
48 | #include "acinterp.h" | |
69ec87ef | 49 | #include "actables.h" |
ab6c5733 | 50 | #include "acnamesp.h" |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_PARSER |
4be44fcd | 53 | ACPI_MODULE_NAME("psxface") |
1da177e4 | 54 | |
0c9938cc | 55 | /* Local Prototypes */ |
0c9938cc | 56 | static void |
4119532c | 57 | acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action); |
1da177e4 | 58 | |
50eca3eb BM |
59 | /******************************************************************************* |
60 | * | |
61 | * FUNCTION: acpi_debug_trace | |
62 | * | |
63 | * PARAMETERS: method_name - Valid ACPI name string | |
64 | * debug_level - Optional level mask. 0 to use default | |
65 | * debug_layer - Optional layer mask. 0 to use default | |
ba494bee | 66 | * flags - bit 1: one shot(1) or persistent(0) |
50eca3eb BM |
67 | * |
68 | * RETURN: Status | |
69 | * | |
70 | * DESCRIPTION: External interface to enable debug tracing during control | |
71 | * method execution | |
72 | * | |
73 | ******************************************************************************/ | |
74 | ||
75 | acpi_status | |
ab6c5733 | 76 | acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags) |
50eca3eb BM |
77 | { |
78 | acpi_status status; | |
79 | ||
80 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
81 | if (ACPI_FAILURE(status)) { | |
82 | return (status); | |
83 | } | |
84 | ||
ab6c5733 | 85 | acpi_gbl_trace_method_name = name; |
50eca3eb | 86 | acpi_gbl_trace_flags = flags; |
ab6c5733 LZ |
87 | acpi_gbl_trace_dbg_level = debug_level; |
88 | acpi_gbl_trace_dbg_layer = debug_layer; | |
89 | status = AE_OK; | |
50eca3eb BM |
90 | |
91 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
ab6c5733 | 92 | return (status); |
50eca3eb BM |
93 | } |
94 | ||
1da177e4 LT |
95 | /******************************************************************************* |
96 | * | |
0c9938cc | 97 | * FUNCTION: acpi_ps_execute_method |
1da177e4 | 98 | * |
ba494bee BM |
99 | * PARAMETERS: info - Method info block, contains: |
100 | * node - Method Node to execute | |
0c9938cc | 101 | * obj_desc - Method object |
ba494bee | 102 | * parameters - List of parameters to pass to the method, |
1da177e4 LT |
103 | * terminated by NULL. Params itself may be |
104 | * NULL if no parameters are being passed. | |
44f6c012 RM |
105 | * return_object - Where to put method's return value (if |
106 | * any). If NULL, no value is returned. | |
107 | * parameter_type - Type of Parameter list | |
108 | * return_object - Where to put method's return value (if | |
109 | * any). If NULL, no value is returned. | |
0c9938cc | 110 | * pass_number - Parse or execute pass |
1da177e4 LT |
111 | * |
112 | * RETURN: Status | |
113 | * | |
114 | * DESCRIPTION: Execute a control method | |
115 | * | |
116 | ******************************************************************************/ | |
117 | ||
f5c1e1c5 | 118 | acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) |
1da177e4 | 119 | { |
4be44fcd | 120 | acpi_status status; |
9bc75cff VP |
121 | union acpi_parse_object *op; |
122 | struct acpi_walk_state *walk_state; | |
1da177e4 | 123 | |
b229cf92 | 124 | ACPI_FUNCTION_TRACE(ps_execute_method); |
1da177e4 | 125 | |
729df0f8 LM |
126 | /* Quick validation of DSDT header */ |
127 | ||
128 | acpi_tb_check_dsdt_header(); | |
129 | ||
0c9938cc | 130 | /* Validate the Info and method Node */ |
1da177e4 | 131 | |
29a241cc | 132 | if (!info || !info->node) { |
4be44fcd | 133 | return_ACPI_STATUS(AE_NULL_ENTRY); |
1da177e4 LT |
134 | } |
135 | ||
1da177e4 LT |
136 | /* Init for new method, wait on concurrency semaphore */ |
137 | ||
4be44fcd | 138 | status = |
29a241cc | 139 | acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL); |
4be44fcd LB |
140 | if (ACPI_FAILURE(status)) { |
141 | return_ACPI_STATUS(status); | |
1da177e4 LT |
142 | } |
143 | ||
0c9938cc | 144 | /* |
9bc75cff | 145 | * The caller "owns" the parameters, so give each one an extra reference |
0c9938cc | 146 | */ |
4be44fcd | 147 | acpi_ps_update_parameter_list(info, REF_INCREMENT); |
1da177e4 | 148 | |
0c9938cc | 149 | /* |
9bc75cff | 150 | * Execute the method. Performs parse simultaneously |
0c9938cc | 151 | */ |
4be44fcd | 152 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
9bc75cff | 153 | "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n", |
29a241cc | 154 | info->node->name.ascii, info->node, info->obj_desc)); |
1da177e4 | 155 | |
9bc75cff VP |
156 | /* Create and init a Root Node */ |
157 | ||
62eb935b | 158 | op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start); |
9bc75cff VP |
159 | if (!op) { |
160 | status = AE_NO_MEMORY; | |
0c9938cc | 161 | goto cleanup; |
1da177e4 LT |
162 | } |
163 | ||
9bc75cff | 164 | /* Create and initialize a new walk state */ |
1da177e4 | 165 | |
ec3153fb | 166 | info->pass_number = ACPI_IMODE_EXECUTE; |
9bc75cff VP |
167 | walk_state = |
168 | acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, | |
169 | NULL, NULL); | |
170 | if (!walk_state) { | |
171 | status = AE_NO_MEMORY; | |
172 | goto cleanup; | |
173 | } | |
174 | ||
29a241cc | 175 | status = acpi_ds_init_aml_walk(walk_state, op, info->node, |
9bc75cff VP |
176 | info->obj_desc->method.aml_start, |
177 | info->obj_desc->method.aml_length, info, | |
178 | info->pass_number); | |
179 | if (ACPI_FAILURE(status)) { | |
180 | acpi_ds_delete_walk_state(walk_state); | |
181 | goto cleanup; | |
182 | } | |
183 | ||
26294842 | 184 | if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) { |
7f0c826a LM |
185 | walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL; |
186 | } | |
187 | ||
a8fadc92 BM |
188 | /* Invoke an internal method if necessary */ |
189 | ||
26294842 | 190 | if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) { |
e31c32cf | 191 | status = |
26294842 | 192 | info->obj_desc->method.dispatch.implementation(walk_state); |
a8fadc92 BM |
193 | info->return_object = walk_state->return_desc; |
194 | ||
195 | /* Cleanup states */ | |
196 | ||
197 | acpi_ds_scope_stack_clear(walk_state); | |
198 | acpi_ps_cleanup_scope(&walk_state->parser_state); | |
199 | acpi_ds_terminate_control_method(walk_state->method_desc, | |
200 | walk_state); | |
201 | acpi_ds_delete_walk_state(walk_state); | |
202 | goto cleanup; | |
203 | } | |
204 | ||
7a4b8131 LM |
205 | /* |
206 | * Start method evaluation with an implicit return of zero. | |
207 | * This is done for Windows compatibility. | |
208 | */ | |
209 | if (acpi_gbl_enable_interpreter_slack) { | |
210 | walk_state->implicit_return_obj = | |
dc95a270 | 211 | acpi_ut_create_integer_object((u64) 0); |
7a4b8131 LM |
212 | if (!walk_state->implicit_return_obj) { |
213 | status = AE_NO_MEMORY; | |
214 | acpi_ds_delete_walk_state(walk_state); | |
215 | goto cleanup; | |
216 | } | |
7a4b8131 LM |
217 | } |
218 | ||
9bc75cff VP |
219 | /* Parse the AML */ |
220 | ||
221 | status = acpi_ps_parse_aml(walk_state); | |
222 | ||
223 | /* walk_state was deleted by parse_aml */ | |
0c9938cc | 224 | |
10622bf8 | 225 | cleanup: |
9bc75cff VP |
226 | acpi_ps_delete_parse_tree(op); |
227 | ||
0c9938cc | 228 | /* Take away the extra reference that we gave the parameters above */ |
1da177e4 | 229 | |
4be44fcd | 230 | acpi_ps_update_parameter_list(info, REF_DECREMENT); |
1da177e4 | 231 | |
0c9938cc | 232 | /* Exit now if error above */ |
1da177e4 | 233 | |
4be44fcd LB |
234 | if (ACPI_FAILURE(status)) { |
235 | return_ACPI_STATUS(status); | |
1da177e4 LT |
236 | } |
237 | ||
0c9938cc RM |
238 | /* |
239 | * If the method has returned an object, signal this to the caller with | |
240 | * a control exception code | |
241 | */ | |
242 | if (info->return_object) { | |
b229cf92 | 243 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n", |
4be44fcd LB |
244 | info->return_object)); |
245 | ACPI_DUMP_STACK_ENTRY(info->return_object); | |
0c9938cc RM |
246 | |
247 | status = AE_CTRL_RETURN_VALUE; | |
1da177e4 LT |
248 | } |
249 | ||
4be44fcd | 250 | return_ACPI_STATUS(status); |
0c9938cc | 251 | } |
44f6c012 | 252 | |
0c9938cc RM |
253 | /******************************************************************************* |
254 | * | |
255 | * FUNCTION: acpi_ps_update_parameter_list | |
256 | * | |
ba494bee | 257 | * PARAMETERS: info - See struct acpi_evaluate_info |
0c9938cc | 258 | * (Used: parameter_type and Parameters) |
ba494bee | 259 | * action - Add or Remove reference |
0c9938cc RM |
260 | * |
261 | * RETURN: Status | |
262 | * | |
263 | * DESCRIPTION: Update reference count on all method parameter objects | |
264 | * | |
265 | ******************************************************************************/ | |
1da177e4 | 266 | |
0c9938cc | 267 | static void |
4119532c | 268 | acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action) |
0c9938cc | 269 | { |
67a119f9 | 270 | u32 i; |
1da177e4 | 271 | |
c91d924e | 272 | if (info->parameters) { |
52fc0b02 | 273 | |
0c9938cc | 274 | /* Update reference count for each parameter */ |
1da177e4 LT |
275 | |
276 | for (i = 0; info->parameters[i]; i++) { | |
52fc0b02 | 277 | |
1da177e4 LT |
278 | /* Ignore errors, just do them all */ |
279 | ||
4be44fcd LB |
280 | (void)acpi_ut_update_object_reference(info-> |
281 | parameters[i], | |
282 | action); | |
1da177e4 LT |
283 | } |
284 | } | |
0c9938cc | 285 | } |