// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acinterp.h" #include "amlcode.h" #define _COMPONENT … ACPI_MODULE_NAME("exmisc") /******************************************************************************* * * FUNCTION: acpi_ex_get_object_reference * * PARAMETERS: obj_desc - Create a reference to this object * return_desc - Where to store the reference * walk_state - Current state * * RETURN: Status * * DESCRIPTION: Obtain and return a "reference" to the target object * Common code for the ref_of_op and the cond_ref_of_op. * ******************************************************************************/ acpi_status acpi_ex_get_object_reference(union acpi_operand_object *obj_desc, union acpi_operand_object **return_desc, struct acpi_walk_state *walk_state) { … } /******************************************************************************* * * FUNCTION: acpi_ex_do_math_op * * PARAMETERS: opcode - AML opcode * integer0 - Integer operand #0 * integer1 - Integer operand #1 * * RETURN: Integer result of the operation * * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the * math functions here is to prevent a lot of pointer dereferencing * to obtain the operands. * ******************************************************************************/ u64 acpi_ex_do_math_op(u16 opcode, u64 integer0, u64 integer1) { … } /******************************************************************************* * * FUNCTION: acpi_ex_do_logical_numeric_op * * PARAMETERS: opcode - AML opcode * integer0 - Integer operand #0 * integer1 - Integer operand #1 * logical_result - TRUE/FALSE result of the operation * * RETURN: Status * * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric * operators (LAnd and LOr), both operands must be integers. * * Note: cleanest machine code seems to be produced by the code * below, rather than using statements of the form: * Result = (Integer0 && Integer1); * ******************************************************************************/ acpi_status acpi_ex_do_logical_numeric_op(u16 opcode, u64 integer0, u64 integer1, u8 *logical_result) { … } /******************************************************************************* * * FUNCTION: acpi_ex_do_logical_op * * PARAMETERS: opcode - AML opcode * operand0 - operand #0 * operand1 - operand #1 * logical_result - TRUE/FALSE result of the operation * * RETURN: Status * * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the * functions here is to prevent a lot of pointer dereferencing * to obtain the operands and to simplify the generation of the * logical value. For the Numeric operators (LAnd and LOr), both * operands must be integers. For the other logical operators, * operands can be any combination of Integer/String/Buffer. The * first operand determines the type to which the second operand * will be converted. * * Note: cleanest machine code seems to be produced by the code * below, rather than using statements of the form: * Result = (Operand0 == Operand1); * ******************************************************************************/ acpi_status acpi_ex_do_logical_op(u16 opcode, union acpi_operand_object *operand0, union acpi_operand_object *operand1, u8 * logical_result) { … }
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