1 /******************************************************************************
3 * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2013, Intel Corp.
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44 #include <acpi/acpi.h>
51 #define _COMPONENT ACPI_EXECUTER
52 ACPI_MODULE_NAME("exoparg2")
55 * Naming convention for AML interpreter execution routines.
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:
61 * AcpiExOpcode_xA_yT_zR
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).
72 * The AcpiExOpcode* functions are called via the Dispatcher component with
73 * fully resolved operands.
75 /*******************************************************************************
77 * FUNCTION: acpi_ex_opcode_2A_0T_0R
79 * PARAMETERS: walk_state - Current walk state
83 * DESCRIPTION: Execute opcode with two arguments, no target, and no return
86 * ALLOCATION: Deletes both operands
88 ******************************************************************************/
89 acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
91 union acpi_operand_object **operand = &walk_state->operands[0];
92 struct acpi_namespace_node *node;
94 acpi_status status = AE_OK;
96 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R,
97 acpi_ps_get_opcode_name(walk_state->opcode));
99 /* Examine the opcode */
101 switch (walk_state->opcode) {
102 case AML_NOTIFY_OP: /* Notify (notify_object, notify_value) */
104 /* The first operand is a namespace node */
106 node = (struct acpi_namespace_node *)operand[0];
108 /* Second value is the notify value */
110 value = (u32) operand[1]->integer.value;
112 /* Are notifies allowed on this object? */
114 if (!acpi_ev_is_notify_object(node)) {
116 "Unexpected notify object type [%s]",
117 acpi_ut_get_type_name(node->type)));
119 status = AE_AML_OPERAND_TYPE;
124 * Dispatch the notify to the appropriate handler
125 * NOTE: the request is queued for execution after this method
126 * completes. The notify handlers are NOT invoked synchronously
127 * from this thread -- because handlers may in turn run other
130 status = acpi_ev_queue_notify_request(node, value);
135 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
136 walk_state->opcode));
137 status = AE_AML_BAD_OPCODE;
140 return_ACPI_STATUS(status);
143 /*******************************************************************************
145 * FUNCTION: acpi_ex_opcode_2A_2T_1R
147 * PARAMETERS: walk_state - Current walk state
151 * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
152 * and one implicit return value.
154 ******************************************************************************/
156 acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
158 union acpi_operand_object **operand = &walk_state->operands[0];
159 union acpi_operand_object *return_desc1 = NULL;
160 union acpi_operand_object *return_desc2 = NULL;
163 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R,
164 acpi_ps_get_opcode_name(walk_state->opcode));
166 /* Execute the opcode */
168 switch (walk_state->opcode) {
171 /* Divide (Dividend, Divisor, remainder_result quotient_result) */
174 acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
176 status = AE_NO_MEMORY;
181 acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
183 status = AE_NO_MEMORY;
187 /* Quotient to return_desc1, remainder to return_desc2 */
189 status = acpi_ut_divide(operand[0]->integer.value,
190 operand[1]->integer.value,
191 &return_desc1->integer.value,
192 &return_desc2->integer.value);
193 if (ACPI_FAILURE(status)) {
200 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
201 walk_state->opcode));
202 status = AE_AML_BAD_OPCODE;
206 /* Store the results to the target reference operands */
208 status = acpi_ex_store(return_desc2, operand[2], walk_state);
209 if (ACPI_FAILURE(status)) {
213 status = acpi_ex_store(return_desc1, operand[3], walk_state);
214 if (ACPI_FAILURE(status)) {
220 * Since the remainder is not returned indirectly, remove a reference to
221 * it. Only the quotient is returned indirectly.
223 acpi_ut_remove_reference(return_desc2);
225 if (ACPI_FAILURE(status)) {
227 /* Delete the return object */
229 acpi_ut_remove_reference(return_desc1);
232 /* Save return object (the remainder) on success */
235 walk_state->result_obj = return_desc1;
238 return_ACPI_STATUS(status);
241 /*******************************************************************************
243 * FUNCTION: acpi_ex_opcode_2A_1T_1R
245 * PARAMETERS: walk_state - Current walk state
249 * DESCRIPTION: Execute opcode with two arguments, one target, and a return
252 ******************************************************************************/
254 acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
256 union acpi_operand_object **operand = &walk_state->operands[0];
257 union acpi_operand_object *return_desc = NULL;
259 acpi_status status = AE_OK;
260 acpi_size length = 0;
262 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
263 acpi_ps_get_opcode_name(walk_state->opcode));
265 /* Execute the opcode */
267 if (walk_state->op_info->flags & AML_MATH) {
269 /* All simple math opcodes (add, etc.) */
271 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
273 status = AE_NO_MEMORY;
277 return_desc->integer.value =
278 acpi_ex_do_math_op(walk_state->opcode,
279 operand[0]->integer.value,
280 operand[1]->integer.value);
281 goto store_result_to_target;
284 switch (walk_state->opcode) {
285 case AML_MOD_OP: /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
287 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
289 status = AE_NO_MEMORY;
293 /* return_desc will contain the remainder */
295 status = acpi_ut_divide(operand[0]->integer.value,
296 operand[1]->integer.value,
297 NULL, &return_desc->integer.value);
300 case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */
302 status = acpi_ex_do_concatenate(operand[0], operand[1],
303 &return_desc, walk_state);
306 case AML_TO_STRING_OP: /* to_string (Buffer, Length, Result) (ACPI 2.0) */
309 * Input object is guaranteed to be a buffer at this point (it may have
310 * been converted.) Copy the raw buffer data to a new object of
315 * Get the length of the new string. It is the smallest of:
316 * 1) Length of the input buffer
317 * 2) Max length as specified in the to_string operator
318 * 3) Length of input buffer up to a zero byte (null terminator)
320 * NOTE: A length of zero is ok, and will create a zero-length, null
323 while ((length < operand[0]->buffer.length) &&
324 (length < operand[1]->integer.value) &&
325 (operand[0]->buffer.pointer[length])) {
329 /* Allocate a new string object */
331 return_desc = acpi_ut_create_string_object(length);
333 status = AE_NO_MEMORY;
338 * Copy the raw buffer data with no transform.
339 * (NULL terminated already)
341 ACPI_MEMCPY(return_desc->string.pointer,
342 operand[0]->buffer.pointer, length);
345 case AML_CONCAT_RES_OP:
347 /* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
349 status = acpi_ex_concat_template(operand[0], operand[1],
350 &return_desc, walk_state);
353 case AML_INDEX_OP: /* Index (Source Index Result) */
355 /* Create the internal return object */
358 acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
360 status = AE_NO_MEMORY;
364 /* Initialize the Index reference object */
366 index = operand[1]->integer.value;
367 return_desc->reference.value = (u32) index;
368 return_desc->reference.class = ACPI_REFCLASS_INDEX;
371 * At this point, the Source operand is a String, Buffer, or Package.
372 * Verify that the index is within range.
374 switch ((operand[0])->common.type) {
375 case ACPI_TYPE_STRING:
377 if (index >= operand[0]->string.length) {
378 length = operand[0]->string.length;
379 status = AE_AML_STRING_LIMIT;
382 return_desc->reference.target_type =
383 ACPI_TYPE_BUFFER_FIELD;
386 case ACPI_TYPE_BUFFER:
388 if (index >= operand[0]->buffer.length) {
389 length = operand[0]->buffer.length;
390 status = AE_AML_BUFFER_LIMIT;
393 return_desc->reference.target_type =
394 ACPI_TYPE_BUFFER_FIELD;
397 case ACPI_TYPE_PACKAGE:
399 if (index >= operand[0]->package.count) {
400 length = operand[0]->package.count;
401 status = AE_AML_PACKAGE_LIMIT;
404 return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
405 return_desc->reference.where =
406 &operand[0]->package.elements[index];
411 status = AE_AML_INTERNAL;
415 /* Failure means that the Index was beyond the end of the object */
417 if (ACPI_FAILURE(status)) {
418 ACPI_EXCEPTION((AE_INFO, status,
419 "Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
420 ACPI_FORMAT_UINT64(index),
426 * Save the target object and add a reference to it for the life
429 return_desc->reference.object = operand[0];
430 acpi_ut_add_reference(operand[0]);
432 /* Store the reference to the Target */
434 status = acpi_ex_store(return_desc, operand[2], walk_state);
436 /* Return the reference */
438 walk_state->result_obj = return_desc;
443 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
444 walk_state->opcode));
445 status = AE_AML_BAD_OPCODE;
449 store_result_to_target:
451 if (ACPI_SUCCESS(status)) {
453 * Store the result of the operation (which is now in return_desc) into
454 * the Target descriptor.
456 status = acpi_ex_store(return_desc, operand[2], walk_state);
457 if (ACPI_FAILURE(status)) {
461 if (!walk_state->result_obj) {
462 walk_state->result_obj = return_desc;
468 /* Delete return object on error */
470 if (ACPI_FAILURE(status)) {
471 acpi_ut_remove_reference(return_desc);
472 walk_state->result_obj = NULL;
475 return_ACPI_STATUS(status);
478 /*******************************************************************************
480 * FUNCTION: acpi_ex_opcode_2A_0T_1R
482 * PARAMETERS: walk_state - Current walk state
486 * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
488 ******************************************************************************/
490 acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
492 union acpi_operand_object **operand = &walk_state->operands[0];
493 union acpi_operand_object *return_desc = NULL;
494 acpi_status status = AE_OK;
495 u8 logical_result = FALSE;
497 ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
498 acpi_ps_get_opcode_name(walk_state->opcode));
500 /* Create the internal return object */
502 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
504 status = AE_NO_MEMORY;
508 /* Execute the Opcode */
510 if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {
512 /* logical_op (Operand0, Operand1) */
514 status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
518 value, &logical_result);
519 goto store_logical_result;
520 } else if (walk_state->op_info->flags & AML_LOGICAL) {
522 /* logical_op (Operand0, Operand1) */
524 status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
525 operand[1], &logical_result);
526 goto store_logical_result;
529 switch (walk_state->opcode) {
530 case AML_ACQUIRE_OP: /* Acquire (mutex_object, Timeout) */
533 acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
534 if (status == AE_TIME) {
535 logical_result = TRUE; /* TRUE = Acquire timed out */
540 case AML_WAIT_OP: /* Wait (event_object, Timeout) */
542 status = acpi_ex_system_wait_event(operand[1], operand[0]);
543 if (status == AE_TIME) {
544 logical_result = TRUE; /* TRUE, Wait timed out */
551 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
552 walk_state->opcode));
553 status = AE_AML_BAD_OPCODE;
557 store_logical_result:
559 * Set return value to according to logical_result. logical TRUE (all ones)
560 * Default is FALSE (zero)
562 if (logical_result) {
563 return_desc->integer.value = ACPI_UINT64_MAX;
568 /* Delete return object on error */
570 if (ACPI_FAILURE(status)) {
571 acpi_ut_remove_reference(return_desc);
574 /* Save return object on success */
577 walk_state->result_obj = return_desc;
580 return_ACPI_STATUS(status);