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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exoparg6 - AML execution - opcodes with 6 arguments | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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 "acinterp.h" | |
47 | #include "acparser.h" | |
48 | #include "amlcode.h" | |
1da177e4 | 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: | |
1da177e4 LT |
122 | /* |
123 | * True if equal: (P[i] == M) | |
124 | * Change to: (M == P[i]) | |
125 | */ | |
4be44fcd LB |
126 | status = |
127 | acpi_ex_do_logical_op(AML_LEQUAL_OP, match_obj, package_obj, | |
128 | &logical_result); | |
129 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
130 | return (FALSE); |
131 | } | |
132 | break; | |
133 | ||
134 | case MATCH_MLE: | |
1da177e4 LT |
135 | /* |
136 | * True if less than or equal: (P[i] <= M) (P[i] not_greater than M) | |
137 | * Change to: (M >= P[i]) (M not_less than P[i]) | |
138 | */ | |
4be44fcd LB |
139 | status = |
140 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
141 | &logical_result); | |
142 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
143 | return (FALSE); |
144 | } | |
4be44fcd | 145 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
146 | break; |
147 | ||
148 | case MATCH_MLT: | |
1da177e4 LT |
149 | /* |
150 | * True if less than: (P[i] < M) | |
151 | * Change to: (M > P[i]) | |
152 | */ | |
4be44fcd LB |
153 | status = |
154 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
155 | package_obj, &logical_result); | |
156 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
157 | return (FALSE); |
158 | } | |
159 | break; | |
160 | ||
161 | case MATCH_MGE: | |
1da177e4 LT |
162 | /* |
163 | * True if greater than or equal: (P[i] >= M) (P[i] not_less than M) | |
164 | * Change to: (M <= P[i]) (M not_greater than P[i]) | |
165 | */ | |
4be44fcd LB |
166 | status = |
167 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | |
168 | package_obj, &logical_result); | |
169 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
170 | return (FALSE); |
171 | } | |
4be44fcd | 172 | logical_result = (u8) ! logical_result; |
1da177e4 LT |
173 | break; |
174 | ||
175 | case MATCH_MGT: | |
1da177e4 LT |
176 | /* |
177 | * True if greater than: (P[i] > M) | |
178 | * Change to: (M < P[i]) | |
179 | */ | |
4be44fcd LB |
180 | status = |
181 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | |
182 | &logical_result); | |
183 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
184 | return (FALSE); |
185 | } | |
186 | break; | |
187 | ||
188 | default: | |
189 | ||
190 | /* Undefined */ | |
191 | ||
192 | return (FALSE); | |
193 | } | |
194 | ||
68aafc35 | 195 | return (logical_result); |
1da177e4 LT |
196 | } |
197 | ||
1da177e4 LT |
198 | /******************************************************************************* |
199 | * | |
200 | * FUNCTION: acpi_ex_opcode_6A_0T_1R | |
201 | * | |
202 | * PARAMETERS: walk_state - Current walk state | |
203 | * | |
204 | * RETURN: Status | |
205 | * | |
206 | * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value | |
207 | * | |
208 | ******************************************************************************/ | |
209 | ||
4be44fcd | 210 | acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) |
1da177e4 | 211 | { |
4be44fcd LB |
212 | union acpi_operand_object **operand = &walk_state->operands[0]; |
213 | union acpi_operand_object *return_desc = NULL; | |
214 | acpi_status status = AE_OK; | |
5df7e6cb | 215 | u64 index; |
4be44fcd | 216 | union acpi_operand_object *this_element; |
1da177e4 | 217 | |
b229cf92 | 218 | ACPI_FUNCTION_TRACE_STR(ex_opcode_6A_0T_1R, |
4be44fcd | 219 | acpi_ps_get_opcode_name(walk_state->opcode)); |
1da177e4 LT |
220 | |
221 | switch (walk_state->opcode) { | |
222 | case AML_MATCH_OP: | |
223 | /* | |
224 | * Match (search_pkg[0], match_op1[1], match_obj1[2], | |
225 | * match_op2[3], match_obj2[4], start_index[5]) | |
226 | */ | |
227 | ||
228 | /* Validate both Match Term Operators (MTR, MEQ, etc.) */ | |
229 | ||
230 | if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) || | |
4be44fcd | 231 | (operand[3]->integer.value > MAX_MATCH_OPERATOR)) { |
b8e4d893 | 232 | ACPI_ERROR((AE_INFO, "Match operator out of range")); |
1da177e4 LT |
233 | status = AE_AML_OPERAND_VALUE; |
234 | goto cleanup; | |
235 | } | |
236 | ||
237 | /* Get the package start_index, validate against the package length */ | |
238 | ||
44f6c012 RM |
239 | index = operand[5]->integer.value; |
240 | if (index >= operand[0]->package.count) { | |
b8e4d893 | 241 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 242 | "Index (0x%8.8X%8.8X) beyond package end (0x%X)", |
b8e4d893 BM |
243 | ACPI_FORMAT_UINT64(index), |
244 | operand[0]->package.count)); | |
1da177e4 LT |
245 | status = AE_AML_PACKAGE_LIMIT; |
246 | goto cleanup; | |
247 | } | |
248 | ||
249 | /* Create an integer for the return value */ | |
5df7e6cb | 250 | /* Default return value is ACPI_UINT64_MAX if no match found */ |
1da177e4 | 251 | |
5df7e6cb | 252 | return_desc = acpi_ut_create_integer_object(ACPI_UINT64_MAX); |
1da177e4 LT |
253 | if (!return_desc) { |
254 | status = AE_NO_MEMORY; | |
255 | goto cleanup; | |
256 | ||
257 | } | |
258 | ||
1da177e4 LT |
259 | /* |
260 | * Examine each element until a match is found. Both match conditions | |
261 | * must be satisfied for a match to occur. Within the loop, | |
262 | * "continue" signifies that the current element does not match | |
263 | * and the next should be examined. | |
264 | * | |
265 | * Upon finding a match, the loop will terminate via "break" at | |
73a3090a | 266 | * the bottom. If it terminates "normally", match_value will be |
5df7e6cb | 267 | * ACPI_UINT64_MAX (Ones) (its initial value) indicating that no |
1da177e4 LT |
268 | * match was found. |
269 | */ | |
4be44fcd | 270 | for (; index < operand[0]->package.count; index++) { |
52fc0b02 | 271 | |
1da177e4 LT |
272 | /* Get the current package element */ |
273 | ||
274 | this_element = operand[0]->package.elements[index]; | |
275 | ||
276 | /* Treat any uninitialized (NULL) elements as non-matching */ | |
277 | ||
278 | if (!this_element) { | |
279 | continue; | |
280 | } | |
281 | ||
282 | /* | |
283 | * Both match conditions must be satisfied. Execution of a continue | |
284 | * (proceed to next iteration of enclosing for loop) signifies a | |
285 | * non-match. | |
286 | */ | |
4be44fcd LB |
287 | if (!acpi_ex_do_match((u32) operand[1]->integer.value, |
288 | this_element, operand[2])) { | |
1da177e4 LT |
289 | continue; |
290 | } | |
291 | ||
4be44fcd LB |
292 | if (!acpi_ex_do_match((u32) operand[3]->integer.value, |
293 | this_element, operand[4])) { | |
1da177e4 LT |
294 | continue; |
295 | } | |
296 | ||
297 | /* Match found: Index is the return value */ | |
298 | ||
299 | return_desc->integer.value = index; | |
300 | break; | |
301 | } | |
302 | break; | |
303 | ||
1da177e4 LT |
304 | case AML_LOAD_TABLE_OP: |
305 | ||
4be44fcd | 306 | status = acpi_ex_load_table_op(walk_state, &return_desc); |
1da177e4 LT |
307 | break; |
308 | ||
1da177e4 LT |
309 | default: |
310 | ||
f6a22b0b | 311 | ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", |
b8e4d893 | 312 | walk_state->opcode)); |
1da177e4 LT |
313 | status = AE_AML_BAD_OPCODE; |
314 | goto cleanup; | |
315 | } | |
316 | ||
4be44fcd | 317 | cleanup: |
1da177e4 LT |
318 | |
319 | /* Delete return object on error */ | |
320 | ||
4be44fcd LB |
321 | if (ACPI_FAILURE(status)) { |
322 | acpi_ut_remove_reference(return_desc); | |
1da177e4 LT |
323 | } |
324 | ||
4b6e16cf BM |
325 | /* Save return object on success */ |
326 | ||
327 | else { | |
328 | walk_state->result_obj = return_desc; | |
329 | } | |
330 | ||
4be44fcd | 331 | return_ACPI_STATUS(status); |
1da177e4 | 332 | } |