1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3 *
4 * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
5 *
6 * Copyright (C) 2000 - 2021, Intel Corp.
7 *
8 *****************************************************************************/
9
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acparser.h"
13 #include "acinterp.h"
14 #include "acevents.h"
15 #include "amlcode.h"
16
17 #define _COMPONENT ACPI_EXECUTER
18 ACPI_MODULE_NAME("exoparg2")
19
20 /*!
21 * Naming convention for AML interpreter execution routines.
22 *
23 * The routines that begin execution of AML opcodes are named with a common
24 * convention based upon the number of arguments, the number of target operands,
25 * and whether or not a value is returned:
26 *
27 * AcpiExOpcode_xA_yT_zR
28 *
29 * Where:
30 *
31 * xA - ARGUMENTS: The number of arguments (input operands) that are
32 * required for this opcode type (1 through 6 args).
33 * yT - TARGETS: The number of targets (output operands) that are required
34 * for this opcode type (0, 1, or 2 targets).
35 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
36 * as the function return (0 or 1).
37 *
38 * The AcpiExOpcode* functions are called via the Dispatcher component with
39 * fully resolved operands.
40 !*/
41 /*******************************************************************************
42 *
43 * FUNCTION: acpi_ex_opcode_2A_0T_0R
44 *
45 * PARAMETERS: walk_state - Current walk state
46 *
47 * RETURN: Status
48 *
49 * DESCRIPTION: Execute opcode with two arguments, no target, and no return
50 * value.
51 *
52 * ALLOCATION: Deletes both operands
53 *
54 ******************************************************************************/
acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state * walk_state)55 acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
56 {
57 union acpi_operand_object **operand = &walk_state->operands[0];
58 struct acpi_namespace_node *node;
59 u32 value;
60 acpi_status status = AE_OK;
61
62 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R,
63 acpi_ps_get_opcode_name(walk_state->opcode));
64
65 /* Examine the opcode */
66
67 switch (walk_state->opcode) {
68 case AML_NOTIFY_OP: /* Notify (notify_object, notify_value) */
69
70 /* The first operand is a namespace node */
71
72 node = (struct acpi_namespace_node *)operand[0];
73
74 /* Second value is the notify value */
75
76 value = (u32) operand[1]->integer.value;
77
78 /* Are notifies allowed on this object? */
79
80 if (!acpi_ev_is_notify_object(node)) {
81 ACPI_ERROR((AE_INFO,
82 "Unexpected notify object type [%s]",
83 acpi_ut_get_type_name(node->type)));
84
85 status = AE_AML_OPERAND_TYPE;
86 break;
87 }
88
89 /*
90 * Dispatch the notify to the appropriate handler
91 * NOTE: the request is queued for execution after this method
92 * completes. The notify handlers are NOT invoked synchronously
93 * from this thread -- because handlers may in turn run other
94 * control methods.
95 */
96 status = acpi_ev_queue_notify_request(node, value);
97 break;
98
99 default:
100
101 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
102 walk_state->opcode));
103 status = AE_AML_BAD_OPCODE;
104 }
105
106 return_ACPI_STATUS(status);
107 }
108
109 /*******************************************************************************
110 *
111 * FUNCTION: acpi_ex_opcode_2A_2T_1R
112 *
113 * PARAMETERS: walk_state - Current walk state
114 *
115 * RETURN: Status
116 *
117 * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
118 * and one implicit return value.
119 *
120 ******************************************************************************/
121
acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state * walk_state)122 acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
123 {
124 union acpi_operand_object **operand = &walk_state->operands[0];
125 union acpi_operand_object *return_desc1 = NULL;
126 union acpi_operand_object *return_desc2 = NULL;
127 acpi_status status;
128
129 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R,
130 acpi_ps_get_opcode_name(walk_state->opcode));
131
132 /* Execute the opcode */
133
134 switch (walk_state->opcode) {
135 case AML_DIVIDE_OP:
136
137 /* Divide (Dividend, Divisor, remainder_result quotient_result) */
138
139 return_desc1 =
140 acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
141 if (!return_desc1) {
142 status = AE_NO_MEMORY;
143 goto cleanup;
144 }
145
146 return_desc2 =
147 acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
148 if (!return_desc2) {
149 status = AE_NO_MEMORY;
150 goto cleanup;
151 }
152
153 /* Quotient to return_desc1, remainder to return_desc2 */
154
155 status = acpi_ut_divide(operand[0]->integer.value,
156 operand[1]->integer.value,
157 &return_desc1->integer.value,
158 &return_desc2->integer.value);
159 if (ACPI_FAILURE(status)) {
160 goto cleanup;
161 }
162 break;
163
164 default:
165
166 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
167 walk_state->opcode));
168
169 status = AE_AML_BAD_OPCODE;
170 goto cleanup;
171 }
172
173 /* Store the results to the target reference operands */
174
175 status = acpi_ex_store(return_desc2, operand[2], walk_state);
176 if (ACPI_FAILURE(status)) {
177 goto cleanup;
178 }
179
180 status = acpi_ex_store(return_desc1, operand[3], walk_state);
181 if (ACPI_FAILURE(status)) {
182 goto cleanup;
183 }
184
185 cleanup:
186 /*
187 * Since the remainder is not returned indirectly, remove a reference to
188 * it. Only the quotient is returned indirectly.
189 */
190 acpi_ut_remove_reference(return_desc2);
191
192 if (ACPI_FAILURE(status)) {
193
194 /* Delete the return object */
195
196 acpi_ut_remove_reference(return_desc1);
197 }
198
199 /* Save return object (the remainder) on success */
200
201 else {
202 walk_state->result_obj = return_desc1;
203 }
204
205 return_ACPI_STATUS(status);
206 }
207
208 /*******************************************************************************
209 *
210 * FUNCTION: acpi_ex_opcode_2A_1T_1R
211 *
212 * PARAMETERS: walk_state - Current walk state
213 *
214 * RETURN: Status
215 *
216 * DESCRIPTION: Execute opcode with two arguments, one target, and a return
217 * value.
218 *
219 ******************************************************************************/
220
acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state * walk_state)221 acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
222 {
223 union acpi_operand_object **operand = &walk_state->operands[0];
224 union acpi_operand_object *return_desc = NULL;
225 u64 index;
226 acpi_status status = AE_OK;
227 acpi_size length = 0;
228
229 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
230 acpi_ps_get_opcode_name(walk_state->opcode));
231
232 /* Execute the opcode */
233
234 if (walk_state->op_info->flags & AML_MATH) {
235
236 /* All simple math opcodes (add, etc.) */
237
238 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
239 if (!return_desc) {
240 status = AE_NO_MEMORY;
241 goto cleanup;
242 }
243
244 return_desc->integer.value =
245 acpi_ex_do_math_op(walk_state->opcode,
246 operand[0]->integer.value,
247 operand[1]->integer.value);
248 goto store_result_to_target;
249 }
250
251 switch (walk_state->opcode) {
252 case AML_MOD_OP: /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
253
254 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
255 if (!return_desc) {
256 status = AE_NO_MEMORY;
257 goto cleanup;
258 }
259
260 /* return_desc will contain the remainder */
261
262 status = acpi_ut_divide(operand[0]->integer.value,
263 operand[1]->integer.value,
264 NULL, &return_desc->integer.value);
265 break;
266
267 case AML_CONCATENATE_OP: /* Concatenate (Data1, Data2, Result) */
268
269 status =
270 acpi_ex_do_concatenate(operand[0], operand[1], &return_desc,
271 walk_state);
272 break;
273
274 case AML_TO_STRING_OP: /* to_string (Buffer, Length, Result) (ACPI 2.0) */
275 /*
276 * Input object is guaranteed to be a buffer at this point (it may have
277 * been converted.) Copy the raw buffer data to a new object of
278 * type String.
279 */
280
281 /*
282 * Get the length of the new string. It is the smallest of:
283 * 1) Length of the input buffer
284 * 2) Max length as specified in the to_string operator
285 * 3) Length of input buffer up to a zero byte (null terminator)
286 *
287 * NOTE: A length of zero is ok, and will create a zero-length, null
288 * terminated string.
289 */
290 while ((length < operand[0]->buffer.length) && /* Length of input buffer */
291 (length < operand[1]->integer.value) && /* Length operand */
292 (operand[0]->buffer.pointer[length])) { /* Null terminator */
293 length++;
294 }
295
296 /* Allocate a new string object */
297
298 return_desc = acpi_ut_create_string_object(length);
299 if (!return_desc) {
300 status = AE_NO_MEMORY;
301 goto cleanup;
302 }
303
304 /*
305 * Copy the raw buffer data with no transform.
306 * (NULL terminated already)
307 */
308 memcpy(return_desc->string.pointer,
309 operand[0]->buffer.pointer, length);
310 break;
311
312 case AML_CONCATENATE_TEMPLATE_OP:
313
314 /* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
315
316 status =
317 acpi_ex_concat_template(operand[0], operand[1],
318 &return_desc, walk_state);
319 break;
320
321 case AML_INDEX_OP: /* Index (Source Index Result) */
322
323 /* Create the internal return object */
324
325 return_desc =
326 acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
327 if (!return_desc) {
328 status = AE_NO_MEMORY;
329 goto cleanup;
330 }
331
332 /* Initialize the Index reference object */
333
334 index = operand[1]->integer.value;
335 return_desc->reference.value = (u32) index;
336 return_desc->reference.class = ACPI_REFCLASS_INDEX;
337
338 /*
339 * At this point, the Source operand is a String, Buffer, or Package.
340 * Verify that the index is within range.
341 */
342 switch ((operand[0])->common.type) {
343 case ACPI_TYPE_STRING:
344
345 if (index >= operand[0]->string.length) {
346 length = operand[0]->string.length;
347 status = AE_AML_STRING_LIMIT;
348 }
349
350 return_desc->reference.target_type =
351 ACPI_TYPE_BUFFER_FIELD;
352 return_desc->reference.index_pointer =
353 &(operand[0]->buffer.pointer[index]);
354 break;
355
356 case ACPI_TYPE_BUFFER:
357
358 if (index >= operand[0]->buffer.length) {
359 length = operand[0]->buffer.length;
360 status = AE_AML_BUFFER_LIMIT;
361 }
362
363 return_desc->reference.target_type =
364 ACPI_TYPE_BUFFER_FIELD;
365 return_desc->reference.index_pointer =
366 &(operand[0]->buffer.pointer[index]);
367 break;
368
369 case ACPI_TYPE_PACKAGE:
370
371 if (index >= operand[0]->package.count) {
372 length = operand[0]->package.count;
373 status = AE_AML_PACKAGE_LIMIT;
374 }
375
376 return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
377 return_desc->reference.where =
378 &operand[0]->package.elements[index];
379 break;
380
381 default:
382
383 ACPI_ERROR((AE_INFO,
384 "Invalid object type: %X",
385 (operand[0])->common.type));
386 status = AE_AML_INTERNAL;
387 goto cleanup;
388 }
389
390 /* Failure means that the Index was beyond the end of the object */
391
392 if (ACPI_FAILURE(status)) {
393 ACPI_BIOS_EXCEPTION((AE_INFO, status,
394 "Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
395 ACPI_FORMAT_UINT64(index),
396 (u32)length));
397 goto cleanup;
398 }
399
400 /*
401 * Save the target object and add a reference to it for the life
402 * of the index
403 */
404 return_desc->reference.object = operand[0];
405 acpi_ut_add_reference(operand[0]);
406
407 /* Store the reference to the Target */
408
409 status = acpi_ex_store(return_desc, operand[2], walk_state);
410
411 /* Return the reference */
412
413 walk_state->result_obj = return_desc;
414 goto cleanup;
415
416 default:
417
418 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
419 walk_state->opcode));
420 status = AE_AML_BAD_OPCODE;
421 break;
422 }
423
424 store_result_to_target:
425
426 if (ACPI_SUCCESS(status)) {
427 /*
428 * Store the result of the operation (which is now in return_desc) into
429 * the Target descriptor.
430 */
431 status = acpi_ex_store(return_desc, operand[2], walk_state);
432 if (ACPI_FAILURE(status)) {
433 goto cleanup;
434 }
435
436 if (!walk_state->result_obj) {
437 walk_state->result_obj = return_desc;
438 }
439 }
440
441 cleanup:
442
443 /* Delete return object on error */
444
445 if (ACPI_FAILURE(status)) {
446 acpi_ut_remove_reference(return_desc);
447 walk_state->result_obj = NULL;
448 }
449
450 return_ACPI_STATUS(status);
451 }
452
453 /*******************************************************************************
454 *
455 * FUNCTION: acpi_ex_opcode_2A_0T_1R
456 *
457 * PARAMETERS: walk_state - Current walk state
458 *
459 * RETURN: Status
460 *
461 * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
462 *
463 ******************************************************************************/
464
acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state * walk_state)465 acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
466 {
467 union acpi_operand_object **operand = &walk_state->operands[0];
468 union acpi_operand_object *return_desc = NULL;
469 acpi_status status = AE_OK;
470 u8 logical_result = FALSE;
471
472 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
473 acpi_ps_get_opcode_name(walk_state->opcode));
474
475 /* Create the internal return object */
476
477 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
478 if (!return_desc) {
479 status = AE_NO_MEMORY;
480 goto cleanup;
481 }
482
483 /* Execute the Opcode */
484
485 if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {
486
487 /* logical_op (Operand0, Operand1) */
488
489 status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
490 operand[0]->integer.
491 value,
492 operand[1]->integer.
493 value, &logical_result);
494 goto store_logical_result;
495 } else if (walk_state->op_info->flags & AML_LOGICAL) {
496
497 /* logical_op (Operand0, Operand1) */
498
499 status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
500 operand[1], &logical_result);
501 goto store_logical_result;
502 }
503
504 switch (walk_state->opcode) {
505 case AML_ACQUIRE_OP: /* Acquire (mutex_object, Timeout) */
506
507 status =
508 acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
509 if (status == AE_TIME) {
510 logical_result = TRUE; /* TRUE = Acquire timed out */
511 status = AE_OK;
512 }
513 break;
514
515 case AML_WAIT_OP: /* Wait (event_object, Timeout) */
516
517 status = acpi_ex_system_wait_event(operand[1], operand[0]);
518 if (status == AE_TIME) {
519 logical_result = TRUE; /* TRUE, Wait timed out */
520 status = AE_OK;
521 }
522 break;
523
524 default:
525
526 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
527 walk_state->opcode));
528
529 status = AE_AML_BAD_OPCODE;
530 goto cleanup;
531 }
532
533 store_logical_result:
534 /*
535 * Set return value to according to logical_result. logical TRUE (all ones)
536 * Default is FALSE (zero)
537 */
538 if (logical_result) {
539 return_desc->integer.value = ACPI_UINT64_MAX;
540 }
541
542 cleanup:
543
544 /* Delete return object on error */
545
546 if (ACPI_FAILURE(status)) {
547 acpi_ut_remove_reference(return_desc);
548 }
549
550 /* Save return object on success */
551
552 else {
553 walk_state->result_obj = return_desc;
554 }
555
556 return_ACPI_STATUS(status);
557 }
558