1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: exoparg6 - AML execution - opcodes with 6 arguments
*
* Copyright (C) 2000 - 2020, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exoparg6")
/*!
* Naming convention for AML interpreter execution routines.
*
* The routines that begin execution of AML opcodes are named with a common
* convention based upon the number of arguments, the number of target operands,
* and whether or not a value is returned:
*
* AcpiExOpcode_xA_yT_zR
*
* Where:
*
* xA - ARGUMENTS: The number of arguments (input operands) that are
* required for this opcode type (1 through 6 args).
* yT - TARGETS: The number of targets (output operands) that are required
* for this opcode type (0, 1, or 2 targets).
* zR - RETURN VALUE: Indicates whether this opcode type returns a value
* as the function return (0 or 1).
*
* The AcpiExOpcode* functions are called via the Dispatcher component with
* fully resolved operands.
!*/
/* Local prototypes */
static u8
acpi_ex_do_match(u32 match_op,
union acpi_operand_object *package_obj,
union acpi_operand_object *match_obj);
/*******************************************************************************
*
* FUNCTION: acpi_ex_do_match
*
* PARAMETERS: match_op - The AML match operand
* package_obj - Object from the target package
* match_obj - Object to be matched
*
* RETURN: TRUE if the match is successful, FALSE otherwise
*
* DESCRIPTION: Implements the low-level match for the ASL Match operator.
* Package elements will be implicitly converted to the type of
* the match object (Integer/Buffer/String).
*
******************************************************************************/
static u8
acpi_ex_do_match(u32 match_op,
union acpi_operand_object *package_obj,
union acpi_operand_object *match_obj)
{
u8 logical_result = TRUE;
acpi_status status;
/*
* Note: Since the package_obj/match_obj ordering is opposite to that of
* the standard logical operators, we have to reverse them when we call
* do_logical_op in order to make the implicit conversion rules work
* correctly. However, this means we have to flip the entire equation
* also. A bit ugly perhaps, but overall, better than fussing the
* parameters around at runtime, over and over again.
*
* Below, P[i] refers to the package element, M refers to the Match object.
*/
switch (match_op) {
case MATCH_MTR:
/* Always true */
break;
case MATCH_MEQ:
/*
* True if equal: (P[i] == M)
* Change to: (M == P[i])
*/
status =
acpi_ex_do_logical_op(AML_LOGICAL_EQUAL_OP, match_obj,
package_obj, &logical_result);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
break;
case MATCH_MLE:
/*
* True if less than or equal: (P[i] <= M) (P[i] not_greater than M)
* Change to: (M >= P[i]) (M not_less than P[i])
*/
status =
acpi_ex_do_logical_op(AML_LOGICAL_LESS_OP, match_obj,
package_obj, &logical_result);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
logical_result = (u8) ! logical_result;
break;
case MATCH_MLT:
/*
* True if less than: (P[i] < M)
* Change to: (M > P[i])
*/
status =
acpi_ex_do_logical_op(AML_LOGICAL_GREATER_OP, match_obj,
package_obj, &logical_result);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
break;
case MATCH_MGE:
/*
* True if greater than or equal: (P[i] >= M) (P[i] not_less than M)
* Change to: (M <= P[i]) (M not_greater than P[i])
*/
status =
acpi_ex_do_logical_op(AML_LOGICAL_GREATER_OP, match_obj,
package_obj, &logical_result);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
logical_result = (u8) ! logical_result;
break;
case MATCH_MGT:
/*
* True if greater than: (P[i] > M)
* Change to: (M < P[i])
*/
status =
acpi_ex_do_logical_op(AML_LOGICAL_LESS_OP, match_obj,
package_obj, &logical_result);
if (ACPI_FAILURE(status)) {
return (FALSE);
}
break;
default:
/* Undefined */
return (FALSE);
}
return (logical_result);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_opcode_6A_0T_1R
*
* PARAMETERS: walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value
*
******************************************************************************/
acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state *walk_state)
{
union acpi_operand_object **operand = &walk_state->operands[0];
union acpi_operand_object *return_desc = NULL;
acpi_status status = AE_OK;
u64 index;
union acpi_operand_object *this_element;
ACPI_FUNCTION_TRACE_STR(ex_opcode_6A_0T_1R,
acpi_ps_get_opcode_name(walk_state->opcode));
switch (walk_state->opcode) {
case AML_MATCH_OP:
/*
* Match (search_pkg[0], match_op1[1], match_obj1[2],
* match_op2[3], match_obj2[4], start_index[5])
*/
/* Validate both Match Term Operators (MTR, MEQ, etc.) */
if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) ||
(operand[3]->integer.value > MAX_MATCH_OPERATOR)) {
ACPI_ERROR((AE_INFO, "Match operator out of range"));
status = AE_AML_OPERAND_VALUE;
goto cleanup;
}
/* Get the package start_index, validate against the package length */
index = operand[5]->integer.value;
if (index >= operand[0]->package.count) {
ACPI_ERROR((AE_INFO,
"Index (0x%8.8X%8.8X) beyond package end (0x%X)",
ACPI_FORMAT_UINT64(index),
operand[0]->package.count));
status = AE_AML_PACKAGE_LIMIT;
goto cleanup;
}
/* Create an integer for the return value */
/* Default return value is ACPI_UINT64_MAX if no match found */
return_desc = acpi_ut_create_integer_object(ACPI_UINT64_MAX);
if (!return_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/*
* Examine each element until a match is found. Both match conditions
* must be satisfied for a match to occur. Within the loop,
* "continue" signifies that the current element does not match
* and the next should be examined.
*
* Upon finding a match, the loop will terminate via "break" at
* the bottom. If it terminates "normally", match_value will be
* ACPI_UINT64_MAX (Ones) (its initial value) indicating that no
* match was found.
*/
for (; index < operand[0]->package.count; index++) {
/* Get the current package element */
this_element = operand[0]->package.elements[index];
/* Treat any uninitialized (NULL) elements as non-matching */
if (!this_element) {
continue;
}
/*
* Both match conditions must be satisfied. Execution of a continue
* (proceed to next iteration of enclosing for loop) signifies a
* non-match.
*/
if (!acpi_ex_do_match((u32) operand[1]->integer.value,
this_element, operand[2])) {
continue;
}
if (!acpi_ex_do_match((u32) operand[3]->integer.value,
this_element, operand[4])) {
continue;
}
/* Match found: Index is the return value */
return_desc->integer.value = index;
break;
}
break;
case AML_LOAD_TABLE_OP:
status = acpi_ex_load_table_op(walk_state, &return_desc);
break;
default:
ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
walk_state->opcode));
status = AE_AML_BAD_OPCODE;
goto cleanup;
}
cleanup:
/* Delete return object on error */
if (ACPI_FAILURE(status)) {
acpi_ut_remove_reference(return_desc);
}
/* Save return object on success */
else {
walk_state->result_obj = return_desc;
}
return_ACPI_STATUS(status);
}
|
