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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: exoparg6 - AML execution - opcodes with 6 arguments | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
9 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
10 | * All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 LT |
45 | #include <acpi/acpi.h> |
46 | #include <acpi/acinterp.h> | |
47 | #include <acpi/acparser.h> | |
48 | #include <acpi/amlcode.h> | |
49 | ||
1da177e4 | 50 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 51 | ACPI_MODULE_NAME("exoparg6") |
1da177e4 LT |
52 | |
53 | /*! | |
54 | * Naming convention for AML interpreter execution routines. | |
55 | * | |
56 | * The routines that begin execution of AML opcodes are named with a common | |
57 | * convention based upon the number of arguments, the number of target operands, | |
58 | * and whether or not a value is returned: | |
59 | * | |
60 | * AcpiExOpcode_xA_yT_zR | |
61 | * | |
62 | * Where: | |
63 | * | |
64 | * xA - ARGUMENTS: The number of arguments (input operands) that are | |
65 | * required for this opcode type (1 through 6 args). | |
66 | * yT - TARGETS: The number of targets (output operands) that are required | |
67 | * for this opcode type (0, 1, or 2 targets). | |
68 | * zR - RETURN VALUE: Indicates whether this opcode type returns a value | |
69 | * as the function return (0 or 1). | |
70 | * | |
71 | * The AcpiExOpcode* functions are called via the Dispatcher component with | |
72 | * fully resolved operands. | |
73 | !*/ | |
44f6c012 | 74 | /* Local prototypes */ |
44f6c012 | 75 | static u8 |
4be44fcd LB |
76 | acpi_ex_do_match(u32 match_op, |
77 | union acpi_operand_object *package_obj, | |
78 | union acpi_operand_object *match_obj); | |
1da177e4 LT |
79 | |
80 | /******************************************************************************* | |
81 | * | |
82 | * FUNCTION: acpi_ex_do_match | |
83 | * | |
84 | * PARAMETERS: match_op - The AML match operand | |
85 | * package_obj - Object from the target package | |
86 | * match_obj - Object to be matched | |
87 | * | |
88 | * RETURN: TRUE if the match is successful, FALSE otherwise | |
89 | * | |
90 | * DESCRIPTION: Implements the low-level match for the ASL Match operator. | |
91 | * Package elements will be implicitly converted to the type of | |
92 | * the match object (Integer/Buffer/String). | |
93 | * | |
94 | ******************************************************************************/ | |
95 | ||
44f6c012 | 96 | static u8 |
4be44fcd LB |
97 | acpi_ex_do_match(u32 match_op, |
98 | union acpi_operand_object *package_obj, | |
99 | union acpi_operand_object *match_obj) | |
1da177e4 | 100 | { |
4be44fcd LB |
101 | u8 logical_result = TRUE; |
102 | acpi_status status; | |
1da177e4 LT |
103 | |
104 | /* | |
105 | * Note: Since the package_obj/match_obj ordering is opposite to that of | |
106 | * the standard logical operators, we have to reverse them when we call | |
107 | * do_logical_op in order to make the implicit conversion rules work | |
108 | * correctly. However, this means we have to flip the entire equation | |
109 | * also. A bit ugly perhaps, but overall, better than fussing the | |
110 | * parameters around at runtime, over and over again. | |
111 | * | |
112 | * Below, P[i] refers to the package element, M refers to the Match object. | |
113 | */ | |
114 | switch (match_op) { | |
115 | case MATCH_MTR: | |
116 | ||
117 | /* Always true */ | |
118 | ||
119 | break; | |
120 | ||
121 | case MATCH_MEQ: | |
122 | ||
123 | /* | |
124 | * True if equal: (P[i] == M) | |
125 | * Change to: (M == P[i]) | |
126 | */ | |
4be44fcd LB |
127 | status = |
128 | acpi_ex_do_logical_op(AML_LEQUAL_OP, match_obj, package_obj, | |
129 | &logical_result); | |
130 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
131 | return (FALSE); |
132 | } | |
133 | break; | |
134 | ||
135 | case MATCH_MLE: | |
136 | ||
137 | /* | |
138 | * True if less than or equal: (P[i] <= M) (P[i] not_greater than M) | |
139 | * Change to: (M >= P[i]) (M not_less than P[i]) | |
140 | */ | |
4be44fcd LB |
141 | status = |
142 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
143 | &logical_result); | |
144 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
145 | return (FALSE); |
146 | } | |
4be44fcd | 147 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
148 | break; |
149 | ||
150 | case MATCH_MLT: | |
151 | ||
152 | /* | |
153 | * True if less than: (P[i] < M) | |
154 | * Change to: (M > P[i]) | |
155 | */ | |
4be44fcd LB |
156 | status = |
157 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
158 | package_obj, &logical_result); | |
159 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
160 | return (FALSE); |
161 | } | |
162 | break; | |
163 | ||
164 | case MATCH_MGE: | |
165 | ||
166 | /* | |
167 | * True if greater than or equal: (P[i] >= M) (P[i] not_less than M) | |
168 | * Change to: (M <= P[i]) (M not_greater than P[i]) | |
169 | */ | |
4be44fcd LB |
170 | status = |
171 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
172 | package_obj, &logical_result); | |
173 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
174 | return (FALSE); |
175 | } | |
4be44fcd | 176 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
177 | break; |
178 | ||
179 | case MATCH_MGT: | |
180 | ||
181 | /* | |
182 | * True if greater than: (P[i] > M) | |
183 | * Change to: (M < P[i]) | |
184 | */ | |
4be44fcd LB |
185 | status = |
186 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
187 | &logical_result); | |
188 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
189 | return (FALSE); |
190 | } | |
191 | break; | |
192 | ||
193 | default: | |
194 | ||
195 | /* Undefined */ | |
196 | ||
197 | return (FALSE); | |
198 | } | |
199 | ||
200 | return logical_result; | |
201 | } | |
202 | ||
1da177e4 LT |
203 | /******************************************************************************* |
204 | * | |
205 | * FUNCTION: acpi_ex_opcode_6A_0T_1R | |
206 | * | |
207 | * PARAMETERS: walk_state - Current walk state | |
208 | * | |
209 | * RETURN: Status | |
210 | * | |
211 | * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value | |
212 | * | |
213 | ******************************************************************************/ | |
214 | ||
4be44fcd | 215 | acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) |
1da177e4 | 216 | { |
4be44fcd LB |
217 | union acpi_operand_object **operand = &walk_state->operands[0]; |
218 | union acpi_operand_object *return_desc = NULL; | |
219 | acpi_status status = AE_OK; | |
220 | acpi_integer index; | |
221 | union acpi_operand_object *this_element; | |
1da177e4 | 222 | |
4be44fcd LB |
223 | ACPI_FUNCTION_TRACE_STR("ex_opcode_6A_0T_1R", |
224 | acpi_ps_get_opcode_name(walk_state->opcode)); | |
1da177e4 LT |
225 | |
226 | switch (walk_state->opcode) { | |
227 | case AML_MATCH_OP: | |
228 | /* | |
229 | * Match (search_pkg[0], match_op1[1], match_obj1[2], | |
230 | * match_op2[3], match_obj2[4], start_index[5]) | |
231 | */ | |
232 | ||
233 | /* Validate both Match Term Operators (MTR, MEQ, etc.) */ | |
234 | ||
235 | if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) || | |
4be44fcd LB |
236 | (operand[3]->integer.value > MAX_MATCH_OPERATOR)) { |
237 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
238 | "Match operator out of range\n")); | |
1da177e4 LT |
239 | status = AE_AML_OPERAND_VALUE; |
240 | goto cleanup; | |
241 | } | |
242 | ||
243 | /* Get the package start_index, validate against the package length */ | |
244 | ||
44f6c012 RM |
245 | index = operand[5]->integer.value; |
246 | if (index >= operand[0]->package.count) { | |
4be44fcd LB |
247 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
248 | "Index (%X%8.8X) beyond package end (%X)\n", | |
249 | ACPI_FORMAT_UINT64(index), | |
250 | operand[0]->package.count)); | |
1da177e4 LT |
251 | status = AE_AML_PACKAGE_LIMIT; |
252 | goto cleanup; | |
253 | } | |
254 | ||
255 | /* Create an integer for the return value */ | |
256 | ||
4be44fcd | 257 | return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 LT |
258 | if (!return_desc) { |
259 | status = AE_NO_MEMORY; | |
260 | goto cleanup; | |
261 | ||
262 | } | |
263 | ||
264 | /* Default return value if no match found */ | |
265 | ||
266 | return_desc->integer.value = ACPI_INTEGER_MAX; | |
267 | ||
268 | /* | |
269 | * Examine each element until a match is found. Both match conditions | |
270 | * must be satisfied for a match to occur. Within the loop, | |
271 | * "continue" signifies that the current element does not match | |
272 | * and the next should be examined. | |
273 | * | |
274 | * Upon finding a match, the loop will terminate via "break" at | |
275 | * the bottom. If it terminates "normally", match_value will be | |
276 | * ACPI_INTEGER_MAX (Ones) (its initial value) indicating that no | |
277 | * match was found. | |
278 | */ | |
4be44fcd | 279 | for (; index < operand[0]->package.count; index++) { |
1da177e4 LT |
280 | /* Get the current package element */ |
281 | ||
282 | this_element = operand[0]->package.elements[index]; | |
283 | ||
284 | /* Treat any uninitialized (NULL) elements as non-matching */ | |
285 | ||
286 | if (!this_element) { | |
287 | continue; | |
288 | } | |
289 | ||
290 | /* | |
291 | * Both match conditions must be satisfied. Execution of a continue | |
292 | * (proceed to next iteration of enclosing for loop) signifies a | |
293 | * non-match. | |
294 | */ | |
4be44fcd LB |
295 | if (!acpi_ex_do_match((u32) operand[1]->integer.value, |
296 | this_element, operand[2])) { | |
1da177e4 LT |
297 | continue; |
298 | } | |
299 | ||
4be44fcd LB |
300 | if (!acpi_ex_do_match((u32) operand[3]->integer.value, |
301 | this_element, operand[4])) { | |
1da177e4 LT |
302 | continue; |
303 | } | |
304 | ||
305 | /* Match found: Index is the return value */ | |
306 | ||
307 | return_desc->integer.value = index; | |
308 | break; | |
309 | } | |
310 | break; | |
311 | ||
1da177e4 LT |
312 | case AML_LOAD_TABLE_OP: |
313 | ||
4be44fcd | 314 | status = acpi_ex_load_table_op(walk_state, &return_desc); |
1da177e4 LT |
315 | break; |
316 | ||
1da177e4 LT |
317 | default: |
318 | ||
4be44fcd | 319 | ACPI_REPORT_ERROR(("acpi_ex_opcode_6A_0T_1R: Unknown opcode %X\n", walk_state->opcode)); |
1da177e4 LT |
320 | status = AE_AML_BAD_OPCODE; |
321 | goto cleanup; | |
322 | } | |
323 | ||
1da177e4 LT |
324 | walk_state->result_obj = return_desc; |
325 | ||
4be44fcd | 326 | cleanup: |
1da177e4 LT |
327 | |
328 | /* Delete return object on error */ | |
329 | ||
4be44fcd LB |
330 | if (ACPI_FAILURE(status)) { |
331 | acpi_ut_remove_reference(return_desc); | |
1da177e4 LT |
332 | } |
333 | ||
4be44fcd | 334 | return_ACPI_STATUS(status); |
1da177e4 | 335 | } |