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Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2/******************************************************************************
3 *
4 * Module Name: exoparg6 - AML execution - opcodes with 6 arguments
5 *
6 *****************************************************************************/
7
8/*
Bob Moore6c9deb72007-02-02 19:48:24 +03009 * Copyright (C) 2000 - 2007, R. Byron Moore
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <acpi/acpi.h>
46#include <acpi/acinterp.h>
47#include <acpi/acparser.h>
48#include <acpi/amlcode.h>
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040051ACPI_MODULE_NAME("exoparg6")
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
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!*/
Robert Moore44f6c012005-04-18 22:49:35 -040074/* Local prototypes */
Robert Moore44f6c012005-04-18 22:49:35 -040075static u8
Len Brown4be44fc2005-08-05 00:44:28 -040076acpi_ex_do_match(u32 match_op,
77 union acpi_operand_object *package_obj,
78 union acpi_operand_object *match_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
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
Robert Moore44f6c012005-04-18 22:49:35 -040096static u8
Len Brown4be44fc2005-08-05 00:44:28 -040097acpi_ex_do_match(u32 match_op,
98 union acpi_operand_object *package_obj,
99 union acpi_operand_object *match_obj)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
Len Brown4be44fc2005-08-05 00:44:28 -0400101 u8 logical_result = TRUE;
102 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400127 status =
128 acpi_ex_do_logical_op(AML_LEQUAL_OP, match_obj, package_obj,
129 &logical_result);
130 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400141 status =
142 acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj,
143 &logical_result);
144 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 return (FALSE);
146 }
Len Brown4be44fc2005-08-05 00:44:28 -0400147 logical_result = (u8) ! logical_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 break;
149
150 case MATCH_MLT:
151
152 /*
153 * True if less than: (P[i] < M)
154 * Change to: (M > P[i])
155 */
Len Brown4be44fc2005-08-05 00:44:28 -0400156 status =
157 acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj,
158 package_obj, &logical_result);
159 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400170 status =
171 acpi_ex_do_logical_op(AML_LGREATER_OP, match_obj,
172 package_obj, &logical_result);
173 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return (FALSE);
175 }
Len Brown4be44fc2005-08-05 00:44:28 -0400176 logical_result = (u8) ! logical_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 break;
178
179 case MATCH_MGT:
180
181 /*
182 * True if greater than: (P[i] > M)
183 * Change to: (M < P[i])
184 */
Len Brown4be44fc2005-08-05 00:44:28 -0400185 status =
186 acpi_ex_do_logical_op(AML_LLESS_OP, match_obj, package_obj,
187 &logical_result);
188 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 return (FALSE);
190 }
191 break;
192
193 default:
194
195 /* Undefined */
196
197 return (FALSE);
198 }
199
200 return logical_result;
201}
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203/*******************************************************************************
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
Len Brown4be44fc2005-08-05 00:44:28 -0400215acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Len Brown4be44fc2005-08-05 00:44:28 -0400217 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Bob Mooreb229cf92006-04-21 17:15:00 -0400223 ACPI_FUNCTION_TRACE_STR(ex_opcode_6A_0T_1R,
Len Brown4be44fc2005-08-05 00:44:28 -0400224 acpi_ps_get_opcode_name(walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
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) ||
Len Brown4be44fc2005-08-05 00:44:28 -0400236 (operand[3]->integer.value > MAX_MATCH_OPERATOR)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500237 ACPI_ERROR((AE_INFO, "Match operator out of range"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 status = AE_AML_OPERAND_VALUE;
239 goto cleanup;
240 }
241
242 /* Get the package start_index, validate against the package length */
243
Robert Moore44f6c012005-04-18 22:49:35 -0400244 index = operand[5]->integer.value;
245 if (index >= operand[0]->package.count) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500246 ACPI_ERROR((AE_INFO,
247 "Index (%X%8.8X) beyond package end (%X)",
248 ACPI_FORMAT_UINT64(index),
249 operand[0]->package.count));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 status = AE_AML_PACKAGE_LIMIT;
251 goto cleanup;
252 }
253
254 /* Create an integer for the return value */
255
Len Brown4be44fc2005-08-05 00:44:28 -0400256 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (!return_desc) {
258 status = AE_NO_MEMORY;
259 goto cleanup;
260
261 }
262
263 /* Default return value if no match found */
264
265 return_desc->integer.value = ACPI_INTEGER_MAX;
266
267 /*
268 * Examine each element until a match is found. Both match conditions
269 * must be satisfied for a match to occur. Within the loop,
270 * "continue" signifies that the current element does not match
271 * and the next should be examined.
272 *
273 * Upon finding a match, the loop will terminate via "break" at
274 * the bottom. If it terminates "normally", match_value will be
275 * ACPI_INTEGER_MAX (Ones) (its initial value) indicating that no
276 * match was found.
277 */
Len Brown4be44fc2005-08-05 00:44:28 -0400278 for (; index < operand[0]->package.count; index++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 /* 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400295 if (!acpi_ex_do_match((u32) operand[1]->integer.value,
296 this_element, operand[2])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 continue;
298 }
299
Len Brown4be44fc2005-08-05 00:44:28 -0400300 if (!acpi_ex_do_match((u32) operand[3]->integer.value,
301 this_element, operand[4])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 continue;
303 }
304
305 /* Match found: Index is the return value */
306
307 return_desc->integer.value = index;
308 break;
309 }
310 break;
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 case AML_LOAD_TABLE_OP:
313
Len Brown4be44fc2005-08-05 00:44:28 -0400314 status = acpi_ex_load_table_op(walk_state, &return_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 break;
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 default:
318
Bob Mooreb8e4d892006-01-27 16:43:00 -0500319 ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
320 walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 status = AE_AML_BAD_OPCODE;
322 goto cleanup;
323 }
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 walk_state->result_obj = return_desc;
326
Len Brown4be44fc2005-08-05 00:44:28 -0400327 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 /* Delete return object on error */
330
Len Brown4be44fc2005-08-05 00:44:28 -0400331 if (ACPI_FAILURE(status)) {
332 acpi_ut_remove_reference(return_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 }
334
Len Brown4be44fc2005-08-05 00:44:28 -0400335 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}