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Diffstat (limited to 'drivers/acpi/acpica/exoparg6.c')
-rw-r--r-- | drivers/acpi/acpica/exoparg6.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exoparg6.c b/drivers/acpi/acpica/exoparg6.c new file mode 100644 index 000000000000..bbbba504979f --- /dev/null +++ b/drivers/acpi/acpica/exoparg6.c | |||
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1 | |||
2 | /****************************************************************************** | ||
3 | * | ||
4 | * Module Name: exoparg6 - AML execution - opcodes with 6 arguments | ||
5 | * | ||
6 | *****************************************************************************/ | ||
7 | |||
8 | /* | ||
9 | * Copyright (C) 2000 - 2008, Intel Corp. | ||
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 | |||
45 | #include <acpi/acpi.h> | ||
46 | #include <acpi/accommon.h> | ||
47 | #include <acpi/acinterp.h> | ||
48 | #include <acpi/acparser.h> | ||
49 | #include <acpi/amlcode.h> | ||
50 | |||
51 | #define _COMPONENT ACPI_EXECUTER | ||
52 | ACPI_MODULE_NAME("exoparg6") | ||
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 | !*/ | ||
75 | /* Local prototypes */ | ||
76 | static u8 | ||
77 | acpi_ex_do_match(u32 match_op, | ||
78 | union acpi_operand_object *package_obj, | ||
79 | union acpi_operand_object *match_obj); | ||
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 | |||
97 | static u8 | ||
98 | acpi_ex_do_match(u32 match_op, | ||
99 | union acpi_operand_object *package_obj, | ||
100 | union acpi_operand_object *match_obj) | ||
101 | { | ||
102 | u8 logical_result = TRUE; | ||
103 | acpi_status status; | ||
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 | */ | ||
128 | status = | ||
129 | acpi_ex_do_logical_op(AML_LEQUAL_OP, match_obj, package_obj, | ||
130 | &logical_result); | ||
131 | if (ACPI_FAILURE(status)) { | ||
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 | */ | ||
142 | status = | ||
143 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | ||
144 | &logical_result); | ||
145 | if (ACPI_FAILURE(status)) { | ||
146 | return (FALSE); | ||
147 | } | ||
148 | logical_result = (u8) ! logical_result; | ||
149 | break; | ||
150 | |||
151 | case MATCH_MLT: | ||
152 | |||
153 | /* | ||
154 | * True if less than: (P[i] < M) | ||
155 | * Change to: (M > P[i]) | ||
156 | */ | ||
157 | status = | ||
158 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | ||
159 | package_obj, &logical_result); | ||
160 | if (ACPI_FAILURE(status)) { | ||
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 | */ | ||
171 | status = | ||
172 | acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj, | ||
173 | package_obj, &logical_result); | ||
174 | if (ACPI_FAILURE(status)) { | ||
175 | return (FALSE); | ||
176 | } | ||
177 | logical_result = (u8) ! logical_result; | ||
178 | break; | ||
179 | |||
180 | case MATCH_MGT: | ||
181 | |||
182 | /* | ||
183 | * True if greater than: (P[i] > M) | ||
184 | * Change to: (M < P[i]) | ||
185 | */ | ||
186 | status = | ||
187 | acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj, | ||
188 | &logical_result); | ||
189 | if (ACPI_FAILURE(status)) { | ||
190 | return (FALSE); | ||
191 | } | ||
192 | break; | ||
193 | |||
194 | default: | ||
195 | |||
196 | /* Undefined */ | ||
197 | |||
198 | return (FALSE); | ||
199 | } | ||
200 | |||
201 | return logical_result; | ||
202 | } | ||
203 | |||
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 | |||
216 | acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) | ||
217 | { | ||
218 | union acpi_operand_object **operand = &walk_state->operands[0]; | ||
219 | union acpi_operand_object *return_desc = NULL; | ||
220 | acpi_status status = AE_OK; | ||
221 | acpi_integer index; | ||
222 | union acpi_operand_object *this_element; | ||
223 | |||
224 | ACPI_FUNCTION_TRACE_STR(ex_opcode_6A_0T_1R, | ||
225 | acpi_ps_get_opcode_name(walk_state->opcode)); | ||
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) || | ||
237 | (operand[3]->integer.value > MAX_MATCH_OPERATOR)) { | ||
238 | ACPI_ERROR((AE_INFO, "Match operator out of range")); | ||
239 | status = AE_AML_OPERAND_VALUE; | ||
240 | goto cleanup; | ||
241 | } | ||
242 | |||
243 | /* Get the package start_index, validate against the package length */ | ||
244 | |||
245 | index = operand[5]->integer.value; | ||
246 | if (index >= operand[0]->package.count) { | ||
247 | ACPI_ERROR((AE_INFO, | ||
248 | "Index (%X%8.8X) beyond package end (%X)", | ||
249 | ACPI_FORMAT_UINT64(index), | ||
250 | operand[0]->package.count)); | ||
251 | status = AE_AML_PACKAGE_LIMIT; | ||
252 | goto cleanup; | ||
253 | } | ||
254 | |||
255 | /* Create an integer for the return value */ | ||
256 | |||
257 | return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); | ||
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 | */ | ||
279 | for (; index < operand[0]->package.count; index++) { | ||
280 | |||
281 | /* Get the current package element */ | ||
282 | |||
283 | this_element = operand[0]->package.elements[index]; | ||
284 | |||
285 | /* Treat any uninitialized (NULL) elements as non-matching */ | ||
286 | |||
287 | if (!this_element) { | ||
288 | continue; | ||
289 | } | ||
290 | |||
291 | /* | ||
292 | * Both match conditions must be satisfied. Execution of a continue | ||
293 | * (proceed to next iteration of enclosing for loop) signifies a | ||
294 | * non-match. | ||
295 | */ | ||
296 | if (!acpi_ex_do_match((u32) operand[1]->integer.value, | ||
297 | this_element, operand[2])) { | ||
298 | continue; | ||
299 | } | ||
300 | |||
301 | if (!acpi_ex_do_match((u32) operand[3]->integer.value, | ||
302 | this_element, operand[4])) { | ||
303 | continue; | ||
304 | } | ||
305 | |||
306 | /* Match found: Index is the return value */ | ||
307 | |||
308 | return_desc->integer.value = index; | ||
309 | break; | ||
310 | } | ||
311 | break; | ||
312 | |||
313 | case AML_LOAD_TABLE_OP: | ||
314 | |||
315 | status = acpi_ex_load_table_op(walk_state, &return_desc); | ||
316 | break; | ||
317 | |||
318 | default: | ||
319 | |||
320 | ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", | ||
321 | walk_state->opcode)); | ||
322 | status = AE_AML_BAD_OPCODE; | ||
323 | goto cleanup; | ||
324 | } | ||
325 | |||
326 | cleanup: | ||
327 | |||
328 | /* Delete return object on error */ | ||
329 | |||
330 | if (ACPI_FAILURE(status)) { | ||
331 | acpi_ut_remove_reference(return_desc); | ||
332 | } | ||
333 | |||
334 | /* Save return object on success */ | ||
335 | |||
336 | else { | ||
337 | walk_state->result_obj = return_desc; | ||
338 | } | ||
339 | |||
340 | return_ACPI_STATUS(status); | ||
341 | } | ||