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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: exoparg6 - AML execution - opcodes with 6 arguments | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
b4e104ea | 9 | * Copyright (C) 2000 - 2011, Intel Corp. |
1da177e4 LT |
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 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acinterp.h" | |
48 | #include "acparser.h" | |
49 | #include "amlcode.h" | |
1da177e4 | 50 | |
1da177e4 | 51 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 52 | ACPI_MODULE_NAME("exoparg6") |
1da177e4 LT |
53 | |
54 | /*! | |
55 | * Naming convention for AML interpreter execution routines. | |
56 | * | |
57 | * The routines that begin execution of AML opcodes are named with a common | |
58 | * convention based upon the number of arguments, the number of target operands, | |
59 | * and whether or not a value is returned: | |
60 | * | |
61 | * AcpiExOpcode_xA_yT_zR | |
62 | * | |
63 | * Where: | |
64 | * | |
65 | * xA - ARGUMENTS: The number of arguments (input operands) that are | |
66 | * required for this opcode type (1 through 6 args). | |
67 | * yT - TARGETS: The number of targets (output operands) that are required | |
68 | * for this opcode type (0, 1, or 2 targets). | |
69 | * zR - RETURN VALUE: Indicates whether this opcode type returns a value | |
70 | * as the function return (0 or 1). | |
71 | * | |
72 | * The AcpiExOpcode* functions are called via the Dispatcher component with | |
73 | * fully resolved operands. | |
74 | !*/ | |
44f6c012 | 75 | /* Local prototypes */ |
44f6c012 | 76 | static u8 |
4be44fcd LB |
77 | acpi_ex_do_match(u32 match_op, |
78 | union acpi_operand_object *package_obj, | |
79 | union acpi_operand_object *match_obj); | |
1da177e4 LT |
80 | |
81 | /******************************************************************************* | |
82 | * | |
83 | * FUNCTION: acpi_ex_do_match | |
84 | * | |
85 | * PARAMETERS: match_op - The AML match operand | |
86 | * package_obj - Object from the target package | |
87 | * match_obj - Object to be matched | |
88 | * | |
89 | * RETURN: TRUE if the match is successful, FALSE otherwise | |
90 | * | |
91 | * DESCRIPTION: Implements the low-level match for the ASL Match operator. | |
92 | * Package elements will be implicitly converted to the type of | |
93 | * the match object (Integer/Buffer/String). | |
94 | * | |
95 | ******************************************************************************/ | |
96 | ||
44f6c012 | 97 | static u8 |
4be44fcd LB |
98 | acpi_ex_do_match(u32 match_op, |
99 | union acpi_operand_object *package_obj, | |
100 | union acpi_operand_object *match_obj) | |
1da177e4 | 101 | { |
4be44fcd LB |
102 | u8 logical_result = TRUE; |
103 | acpi_status status; | |
1da177e4 LT |
104 | |
105 | /* | |
106 | * Note: Since the package_obj/match_obj ordering is opposite to that of | |
107 | * the standard logical operators, we have to reverse them when we call | |
108 | * do_logical_op in order to make the implicit conversion rules work | |
109 | * correctly. However, this means we have to flip the entire equation | |
110 | * also. A bit ugly perhaps, but overall, better than fussing the | |
111 | * parameters around at runtime, over and over again. | |
112 | * | |
113 | * Below, P[i] refers to the package element, M refers to the Match object. | |
114 | */ | |
115 | switch (match_op) { | |
116 | case MATCH_MTR: | |
117 | ||
118 | /* Always true */ | |
119 | ||
120 | break; | |
121 | ||
122 | case MATCH_MEQ: | |
123 | ||
124 | /* | |
125 | * True if equal: (P[i] == M) | |
126 | * Change to: (M == P[i]) | |
127 | */ | |
4be44fcd LB |
128 | status = |
129 | acpi_ex_do_logical_op(AML_LEQUAL_OP, match_obj, package_obj, | |
130 | &logical_result); | |
131 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
132 | return (FALSE); |
133 | } | |
134 | break; | |
135 | ||
136 | case MATCH_MLE: | |
137 | ||
138 | /* | |
139 | * True if less than or equal: (P[i] <= M) (P[i] not_greater than M) | |
140 | * Change to: (M >= P[i]) (M not_less than P[i]) | |
141 | */ | |
4be44fcd LB |
142 | status = |
143 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
144 | &logical_result); | |
145 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
146 | return (FALSE); |
147 | } | |
4be44fcd | 148 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
149 | break; |
150 | ||
151 | case MATCH_MLT: | |
152 | ||
153 | /* | |
154 | * True if less than: (P[i] < M) | |
155 | * Change to: (M > P[i]) | |
156 | */ | |
4be44fcd LB |
157 | status = |
158 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
159 | package_obj, &logical_result); | |
160 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
161 | return (FALSE); |
162 | } | |
163 | break; | |
164 | ||
165 | case MATCH_MGE: | |
166 | ||
167 | /* | |
168 | * True if greater than or equal: (P[i] >= M) (P[i] not_less than M) | |
169 | * Change to: (M <= P[i]) (M not_greater than P[i]) | |
170 | */ | |
4be44fcd LB |
171 | status = |
172 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
173 | package_obj, &logical_result); | |
174 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
175 | return (FALSE); |
176 | } | |
4be44fcd | 177 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
178 | break; |
179 | ||
180 | case MATCH_MGT: | |
181 | ||
182 | /* | |
183 | * True if greater than: (P[i] > M) | |
184 | * Change to: (M < P[i]) | |
185 | */ | |
4be44fcd LB |
186 | status = |
187 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
188 | &logical_result); | |
189 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
190 | return (FALSE); |
191 | } | |
192 | break; | |
193 | ||
194 | default: | |
195 | ||
196 | /* Undefined */ | |
197 | ||
198 | return (FALSE); | |
199 | } | |
200 | ||
201 | return logical_result; | |
202 | } | |
203 | ||
1da177e4 LT |
204 | /******************************************************************************* |
205 | * | |
206 | * FUNCTION: acpi_ex_opcode_6A_0T_1R | |
207 | * | |
208 | * PARAMETERS: walk_state - Current walk state | |
209 | * | |
210 | * RETURN: Status | |
211 | * | |
212 | * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value | |
213 | * | |
214 | ******************************************************************************/ | |
215 | ||
4be44fcd | 216 | acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) |
1da177e4 | 217 | { |
4be44fcd LB |
218 | union acpi_operand_object **operand = &walk_state->operands[0]; |
219 | union acpi_operand_object *return_desc = NULL; | |
220 | acpi_status status = AE_OK; | |
5df7e6cb | 221 | u64 index; |
4be44fcd | 222 | union acpi_operand_object *this_element; |
1da177e4 | 223 | |
b229cf92 | 224 | ACPI_FUNCTION_TRACE_STR(ex_opcode_6A_0T_1R, |
4be44fcd | 225 | acpi_ps_get_opcode_name(walk_state->opcode)); |
1da177e4 LT |
226 | |
227 | switch (walk_state->opcode) { | |
228 | case AML_MATCH_OP: | |
229 | /* | |
230 | * Match (search_pkg[0], match_op1[1], match_obj1[2], | |
231 | * match_op2[3], match_obj2[4], start_index[5]) | |
232 | */ | |
233 | ||
234 | /* Validate both Match Term Operators (MTR, MEQ, etc.) */ | |
235 | ||
236 | if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) || | |
4be44fcd | 237 | (operand[3]->integer.value > MAX_MATCH_OPERATOR)) { |
b8e4d893 | 238 | ACPI_ERROR((AE_INFO, "Match operator out of range")); |
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) { | |
b8e4d893 | 247 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 248 | "Index (0x%8.8X%8.8X) beyond package end (0x%X)", |
b8e4d893 BM |
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 */ | |
5df7e6cb | 256 | /* Default return value is ACPI_UINT64_MAX if no match found */ |
1da177e4 | 257 | |
5df7e6cb | 258 | return_desc = acpi_ut_create_integer_object(ACPI_UINT64_MAX); |
1da177e4 LT |
259 | if (!return_desc) { |
260 | status = AE_NO_MEMORY; | |
261 | goto cleanup; | |
262 | ||
263 | } | |
264 | ||
1da177e4 LT |
265 | /* |
266 | * Examine each element until a match is found. Both match conditions | |
267 | * must be satisfied for a match to occur. Within the loop, | |
268 | * "continue" signifies that the current element does not match | |
269 | * and the next should be examined. | |
270 | * | |
271 | * Upon finding a match, the loop will terminate via "break" at | |
272 | * the bottom. If it terminates "normally", match_value will be | |
5df7e6cb | 273 | * ACPI_UINT64_MAX (Ones) (its initial value) indicating that no |
1da177e4 LT |
274 | * match was found. |
275 | */ | |
4be44fcd | 276 | for (; index < operand[0]->package.count; index++) { |
52fc0b02 | 277 | |
1da177e4 LT |
278 | /* Get the current package element */ |
279 | ||
280 | this_element = operand[0]->package.elements[index]; | |
281 | ||
282 | /* Treat any uninitialized (NULL) elements as non-matching */ | |
283 | ||
284 | if (!this_element) { | |
285 | continue; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Both match conditions must be satisfied. Execution of a continue | |
290 | * (proceed to next iteration of enclosing for loop) signifies a | |
291 | * non-match. | |
292 | */ | |
4be44fcd LB |
293 | if (!acpi_ex_do_match((u32) operand[1]->integer.value, |
294 | this_element, operand[2])) { | |
1da177e4 LT |
295 | continue; |
296 | } | |
297 | ||
4be44fcd LB |
298 | if (!acpi_ex_do_match((u32) operand[3]->integer.value, |
299 | this_element, operand[4])) { | |
1da177e4 LT |
300 | continue; |
301 | } | |
302 | ||
303 | /* Match found: Index is the return value */ | |
304 | ||
305 | return_desc->integer.value = index; | |
306 | break; | |
307 | } | |
308 | break; | |
309 | ||
1da177e4 LT |
310 | case AML_LOAD_TABLE_OP: |
311 | ||
4be44fcd | 312 | status = acpi_ex_load_table_op(walk_state, &return_desc); |
1da177e4 LT |
313 | break; |
314 | ||
1da177e4 LT |
315 | default: |
316 | ||
f6a22b0b | 317 | ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", |
b8e4d893 | 318 | walk_state->opcode)); |
1da177e4 LT |
319 | status = AE_AML_BAD_OPCODE; |
320 | goto cleanup; | |
321 | } | |
322 | ||
4be44fcd | 323 | cleanup: |
1da177e4 LT |
324 | |
325 | /* Delete return object on error */ | |
326 | ||
4be44fcd LB |
327 | if (ACPI_FAILURE(status)) { |
328 | acpi_ut_remove_reference(return_desc); | |
1da177e4 LT |
329 | } |
330 | ||
4b6e16cf BM |
331 | /* Save return object on success */ |
332 | ||
333 | else { | |
334 | walk_state->result_obj = return_desc; | |
335 | } | |
336 | ||
4be44fcd | 337 | return_ACPI_STATUS(status); |
1da177e4 | 338 | } |