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+/******************************************************************************
+ *
+ * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acparser.h>
+#include <acpi/acinterp.h>
+#include <acpi/acevents.h>
+#include <acpi/amlcode.h>
+
+
+#define _COMPONENT ACPI_EXECUTER
+ ACPI_MODULE_NAME ("exoparg2")
+
+
+/*!
+ * 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.
+!*/
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_opcode_2A_0T_0R
+ *
+ * PARAMETERS: walk_state - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute opcode with two arguments, no target, and no return
+ * value.
+ *
+ * ALLOCATION: Deletes both operands
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_2A_0T_0R (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ struct acpi_namespace_node *node;
+ u32 value;
+ acpi_status status = AE_OK;
+
+
+ ACPI_FUNCTION_TRACE_STR ("ex_opcode_2A_0T_0R",
+ acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+ /* Examine the opcode */
+
+ switch (walk_state->opcode) {
+ case AML_NOTIFY_OP: /* Notify (notify_object, notify_value) */
+
+ /* The first operand is a namespace node */
+
+ node = (struct acpi_namespace_node *) operand[0];
+
+ /* Second value is the notify value */
+
+ value = (u32) operand[1]->integer.value;
+
+ /* Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object (node)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Unexpected notify object type [%s]\n",
+ acpi_ut_get_type_name (node->type)));
+
+ status = AE_AML_OPERAND_TYPE;
+ break;
+ }
+
+#ifdef ACPI_GPE_NOTIFY_CHECK
+ /*
+ * GPE method wake/notify check. Here, we want to ensure that we
+ * don't receive any "device_wake" Notifies from a GPE _Lxx or _Exx
+ * GPE method during system runtime. If we do, the GPE is marked
+ * as "wake-only" and disabled.
+ *
+ * 1) Is the Notify() value == device_wake?
+ * 2) Is this a GPE deferred method? (An _Lxx or _Exx method)
+ * 3) Did the original GPE happen at system runtime?
+ * (versus during wake)
+ *
+ * If all three cases are true, this is a wake-only GPE that should
+ * be disabled at runtime.
+ */
+ if (value == 2) /* device_wake */ {
+ status = acpi_ev_check_for_wake_only_gpe (walk_state->gpe_event_info);
+ if (ACPI_FAILURE (status)) {
+ /* AE_WAKE_ONLY_GPE only error, means ignore this notify */
+
+ return_ACPI_STATUS (AE_OK)
+ }
+ }
+#endif
+
+ /*
+ * Dispatch the notify to the appropriate handler
+ * NOTE: the request is queued for execution after this method
+ * completes. The notify handlers are NOT invoked synchronously
+ * from this thread -- because handlers may in turn run other
+ * control methods.
+ */
+ status = acpi_ev_queue_notify_request (node, value);
+ break;
+
+
+ default:
+
+ ACPI_REPORT_ERROR (("acpi_ex_opcode_2A_0T_0R: Unknown opcode %X\n",
+ walk_state->opcode));
+ status = AE_AML_BAD_OPCODE;
+ }
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_opcode_2A_2T_1R
+ *
+ * PARAMETERS: walk_state - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
+ * and one implicit return value.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_2A_2T_1R (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ union acpi_operand_object *return_desc1 = NULL;
+ union acpi_operand_object *return_desc2 = NULL;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE_STR ("ex_opcode_2A_2T_1R",
+ acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+ /*
+ * Execute the opcode
+ */
+ switch (walk_state->opcode) {
+ case AML_DIVIDE_OP: /* Divide (Dividend, Divisor, remainder_result quotient_result) */
+
+ return_desc1 = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!return_desc1) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ return_desc2 = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!return_desc2) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Quotient to return_desc1, remainder to return_desc2 */
+
+ status = acpi_ut_divide (operand[0]->integer.value,
+ operand[1]->integer.value,
+ &return_desc1->integer.value,
+ &return_desc2->integer.value);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+ break;
+
+
+ default:
+
+ ACPI_REPORT_ERROR (("acpi_ex_opcode_2A_2T_1R: Unknown opcode %X\n",
+ walk_state->opcode));
+ status = AE_AML_BAD_OPCODE;
+ goto cleanup;
+ }
+
+
+ /* Store the results to the target reference operands */
+
+ status = acpi_ex_store (return_desc2, operand[2], walk_state);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ status = acpi_ex_store (return_desc1, operand[3], walk_state);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ /* Return the remainder */
+
+ walk_state->result_obj = return_desc1;
+
+
+cleanup:
+ /*
+ * Since the remainder is not returned indirectly, remove a reference to
+ * it. Only the quotient is returned indirectly.
+ */
+ acpi_ut_remove_reference (return_desc2);
+
+ if (ACPI_FAILURE (status)) {
+ /* Delete the return object */
+
+ acpi_ut_remove_reference (return_desc1);
+ }
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_opcode_2A_1T_1R
+ *
+ * PARAMETERS: walk_state - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute opcode with two arguments, one target, and a return
+ * value.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_2A_1T_1R (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object **operand = &walk_state->operands[0];
+ union acpi_operand_object *return_desc = NULL;
+ u32 index;
+ acpi_status status = AE_OK;
+ acpi_size length;
+
+
+ ACPI_FUNCTION_TRACE_STR ("ex_opcode_2A_1T_1R",
+ acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+ /*
+ * Execute the opcode
+ */
+ if (walk_state->op_info->flags & AML_MATH) {
+ /* All simple math opcodes (add, etc.) */
+
+ return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ return_desc->integer.value = acpi_ex_do_math_op (walk_state->opcode,
+ operand[0]->integer.value,
+ operand[1]->integer.value);
+ goto store_result_to_target;
+ }
+
+
+ switch (walk_state->opcode) {
+ case AML_MOD_OP: /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
+
+ return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* return_desc will contain the remainder */
+
+ status = acpi_ut_divide (operand[0]->integer.value,
+ operand[1]->integer.value,
+ NULL,
+ &return_desc->integer.value);
+ break;
+
+
+ case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */
+
+ status = acpi_ex_do_concatenate (operand[0], operand[1],
+ &return_desc, walk_state);
+ break;
+
+
+ case AML_TO_STRING_OP: /* to_string (Buffer, Length, Result) (ACPI 2.0) */
+
+ /*
+ * Input object is guaranteed to be a buffer at this point (it may have
+ * been converted.) Copy the raw buffer data to a new object of type String.
+ */
+
+ /*
+ * Get the length of the new string. It is the smallest of:
+ * 1) Length of the input buffer
+ * 2) Max length as specified in the to_string operator
+ * 3) Length of input buffer up to a zero byte (null terminator)
+ *
+ * NOTE: A length of zero is ok, and will create a zero-length, null
+ * terminated string.
+ */
+ length = 0;
+ while ((length < operand[0]->buffer.length) &&
+ (length < operand[1]->integer.value) &&
+ (operand[0]->buffer.pointer[length])) {
+ length++;
+ if (length > ACPI_MAX_STRING_CONVERSION) {
+ status = AE_AML_STRING_LIMIT;
+ goto cleanup;
+ }
+ }
+
+ /* Allocate a new string object */
+
+ return_desc = acpi_ut_create_string_object (length);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Copy the raw buffer data with no transform. NULL terminated already. */
+
+ ACPI_MEMCPY (return_desc->string.pointer,
+ operand[0]->buffer.pointer, length);
+ break;
+
+
+ case AML_CONCAT_RES_OP: /* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
+
+ status = acpi_ex_concat_template (operand[0], operand[1],
+ &return_desc, walk_state);
+ break;
+
+
+ case AML_INDEX_OP: /* Index (Source Index Result) */
+
+ /* Create the internal return object */
+
+ return_desc = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ index = (u32) operand[1]->integer.value;
+
+ /*
+ * At this point, the Source operand is a Package, Buffer, or String
+ */
+ if (ACPI_GET_OBJECT_TYPE (operand[0]) == ACPI_TYPE_PACKAGE) {
+ /* Object to be indexed is a Package */
+
+ if (index >= operand[0]->package.count) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Index value (%X) beyond package end (%X)\n",
+ index, operand[0]->package.count));
+ status = AE_AML_PACKAGE_LIMIT;
+ goto cleanup;
+ }
+
+ return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
+ return_desc->reference.object = operand[0];
+ return_desc->reference.where = &operand[0]->package.elements [index];
+ }
+ else {
+ /* Object to be indexed is a Buffer/String */
+
+ if (index >= operand[0]->buffer.length) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Index value (%X) beyond end of buffer (%X)\n",
+ index, operand[0]->buffer.length));
+ status = AE_AML_BUFFER_LIMIT;
+ goto cleanup;
+ }
+
+ return_desc->reference.target_type = ACPI_TYPE_BUFFER_FIELD;
+ return_desc->reference.object = operand[0];
+ }
+
+ /*
+ * Add a reference to the target package/buffer/string for the life
+ * of the index.
+ */
+ acpi_ut_add_reference (operand[0]);
+
+ /* Complete the Index reference object */
+
+ return_desc->reference.opcode = AML_INDEX_OP;
+ return_desc->reference.offset = index;
+
+ /* Store the reference to the Target */
+
+ status = acpi_ex_store (return_desc, operand[2], walk_state);
+
+ /* Return the reference */
+
+ walk_state->result_obj = return_desc;
+ goto cleanup;
+
+
+ default:
+
+ ACPI_REPORT_ERROR (("acpi_ex_opcode_2A_1T_1R: Unknown opcode %X\n",
+ walk_state->opcode));
+ status = AE_AML_BAD_OPCODE;
+ break;
+ }
+
+
+store_result_to_target:
+
+ if (ACPI_SUCCESS (status)) {
+ /*
+ * Store the result of the operation (which is now in return_desc) into
+ * the Target descriptor.
+ */
+ status = acpi_ex_store (return_desc, operand[2], walk_state);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ if (!walk_state->result_obj) {
+ walk_state->result_obj = return_desc;
+ }
+ }
+
+
+cleanup:
+
+ /* Delete return object on error */
+
+ if (ACPI_FAILURE (status)) {
+ acpi_ut_remove_reference (return_desc);
+ }
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_opcode_2A_0T_1R
+ *
+ * PARAMETERS: walk_state - Current walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_2A_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;
+ u8 logical_result = FALSE;
+
+
+ ACPI_FUNCTION_TRACE_STR ("ex_opcode_2A_0T_1R",
+ acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+ /* Create the internal return object */
+
+ return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /*
+ * Execute the Opcode
+ */
+ if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) /* logical_op (Operand0, Operand1) */ {
+ status = acpi_ex_do_logical_numeric_op (walk_state->opcode,
+ operand[0]->integer.value, operand[1]->integer.value,
+ &logical_result);
+ goto store_logical_result;
+ }
+ else if (walk_state->op_info->flags & AML_LOGICAL) /* logical_op (Operand0, Operand1) */ {
+ status = acpi_ex_do_logical_op (walk_state->opcode, operand[0],
+ operand[1], &logical_result);
+ goto store_logical_result;
+ }
+
+
+ switch (walk_state->opcode) {
+ case AML_ACQUIRE_OP: /* Acquire (mutex_object, Timeout) */
+
+ status = acpi_ex_acquire_mutex (operand[1], operand[0], walk_state);
+ if (status == AE_TIME) {
+ logical_result = TRUE; /* TRUE = Acquire timed out */
+ status = AE_OK;
+ }
+ break;
+
+
+ case AML_WAIT_OP: /* Wait (event_object, Timeout) */
+
+ status = acpi_ex_system_wait_event (operand[1], operand[0]);
+ if (status == AE_TIME) {
+ logical_result = TRUE; /* TRUE, Wait timed out */
+ status = AE_OK;
+ }
+ break;
+
+
+ default:
+
+ ACPI_REPORT_ERROR (("acpi_ex_opcode_2A_0T_1R: Unknown opcode %X\n",
+ walk_state->opcode));
+ status = AE_AML_BAD_OPCODE;
+ goto cleanup;
+ }
+
+
+store_logical_result:
+ /*
+ * Set return value to according to logical_result. logical TRUE (all ones)
+ * Default is FALSE (zero)
+ */
+ if (logical_result) {
+ return_desc->integer.value = ACPI_INTEGER_MAX;
+ }
+
+ walk_state->result_obj = return_desc;
+
+
+cleanup:
+
+ /* Delete return object on error */
+
+ if (ACPI_FAILURE (status)) {
+ acpi_ut_remove_reference (return_desc);
+ }
+
+ return_ACPI_STATUS (status);
+}
+
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.