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357 lines
11 KiB
C
357 lines
11 KiB
C
/******************************************************************************
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*
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* Module Name: exoparg6 - AML execution - opcodes with 6 arguments
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "acparser.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exoparg6")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/* Local prototypes */
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static BOOLEAN
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AcpiExDoMatch (
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UINT32 MatchOp,
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ACPI_OPERAND_OBJECT *PackageObj,
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ACPI_OPERAND_OBJECT *MatchObj);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExDoMatch
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*
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* PARAMETERS: MatchOp - The AML match operand
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* PackageObj - Object from the target package
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* MatchObj - Object to be matched
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*
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* RETURN: TRUE if the match is successful, FALSE otherwise
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*
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* DESCRIPTION: Implements the low-level match for the ASL Match operator.
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* Package elements will be implicitly converted to the type of
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* the match object (Integer/Buffer/String).
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*
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******************************************************************************/
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static BOOLEAN
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AcpiExDoMatch (
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UINT32 MatchOp,
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ACPI_OPERAND_OBJECT *PackageObj,
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ACPI_OPERAND_OBJECT *MatchObj)
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{
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BOOLEAN LogicalResult = TRUE;
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ACPI_STATUS Status;
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/*
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* Note: Since the PackageObj/MatchObj ordering is opposite to that of
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* the standard logical operators, we have to reverse them when we call
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* DoLogicalOp in order to make the implicit conversion rules work
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* correctly. However, this means we have to flip the entire equation
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* also. A bit ugly perhaps, but overall, better than fussing the
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* parameters around at runtime, over and over again.
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*
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* Below, P[i] refers to the package element, M refers to the Match object.
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*/
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switch (MatchOp)
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{
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case MATCH_MTR:
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/* Always true */
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break;
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case MATCH_MEQ:
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/*
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* True if equal: (P[i] == M)
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* Change to: (M == P[i])
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*/
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Status = AcpiExDoLogicalOp (
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AML_LOGICAL_EQUAL_OP, MatchObj, PackageObj, &LogicalResult);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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break;
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case MATCH_MLE:
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/*
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* True if less than or equal: (P[i] <= M) (P[i] NotGreater than M)
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* Change to: (M >= P[i]) (M NotLess than P[i])
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*/
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Status = AcpiExDoLogicalOp (
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AML_LOGICAL_LESS_OP, MatchObj, PackageObj, &LogicalResult);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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LogicalResult = (BOOLEAN) !LogicalResult;
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break;
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case MATCH_MLT:
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/*
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* True if less than: (P[i] < M)
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* Change to: (M > P[i])
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*/
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Status = AcpiExDoLogicalOp (
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AML_LOGICAL_GREATER_OP, MatchObj, PackageObj, &LogicalResult);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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break;
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case MATCH_MGE:
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/*
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* True if greater than or equal: (P[i] >= M) (P[i] NotLess than M)
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* Change to: (M <= P[i]) (M NotGreater than P[i])
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*/
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Status = AcpiExDoLogicalOp (
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AML_LOGICAL_GREATER_OP, MatchObj, PackageObj, &LogicalResult);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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LogicalResult = (BOOLEAN)!LogicalResult;
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break;
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case MATCH_MGT:
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/*
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* True if greater than: (P[i] > M)
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* Change to: (M < P[i])
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*/
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Status = AcpiExDoLogicalOp (
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AML_LOGICAL_LESS_OP, MatchObj, PackageObj, &LogicalResult);
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if (ACPI_FAILURE (Status))
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{
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return (FALSE);
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}
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break;
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default:
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/* Undefined */
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return (FALSE);
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}
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return (LogicalResult);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExOpcode_6A_0T_1R
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*
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* PARAMETERS: WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExOpcode_6A_0T_1R (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
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ACPI_STATUS Status = AE_OK;
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UINT64 Index;
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ACPI_OPERAND_OBJECT *ThisElement;
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ACPI_FUNCTION_TRACE_STR (ExOpcode_6A_0T_1R,
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AcpiPsGetOpcodeName (WalkState->Opcode));
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switch (WalkState->Opcode)
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{
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case AML_MATCH_OP:
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/*
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* Match (SearchPkg[0], MatchOp1[1], MatchObj1[2],
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* MatchOp2[3], MatchObj2[4], StartIndex[5])
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*/
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/* Validate both Match Term Operators (MTR, MEQ, etc.) */
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if ((Operand[1]->Integer.Value > MAX_MATCH_OPERATOR) ||
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(Operand[3]->Integer.Value > MAX_MATCH_OPERATOR))
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{
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ACPI_ERROR ((AE_INFO, "Match operator out of range"));
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Status = AE_AML_OPERAND_VALUE;
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goto Cleanup;
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}
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/* Get the package StartIndex, validate against the package length */
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Index = Operand[5]->Integer.Value;
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if (Index >= Operand[0]->Package.Count)
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{
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ACPI_ERROR ((AE_INFO,
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"Index (0x%8.8X%8.8X) beyond package end (0x%X)",
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ACPI_FORMAT_UINT64 (Index), Operand[0]->Package.Count));
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Status = AE_AML_PACKAGE_LIMIT;
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goto Cleanup;
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}
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/* Create an integer for the return value */
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/* Default return value is ACPI_UINT64_MAX if no match found */
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ReturnDesc = AcpiUtCreateIntegerObject (ACPI_UINT64_MAX);
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if (!ReturnDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* Examine each element until a match is found. Both match conditions
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* must be satisfied for a match to occur. Within the loop,
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* "continue" signifies that the current element does not match
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* and the next should be examined.
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*
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* Upon finding a match, the loop will terminate via "break" at
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* the bottom. If it terminates "normally", MatchValue will be
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* ACPI_UINT64_MAX (Ones) (its initial value) indicating that no
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* match was found.
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*/
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for ( ; Index < Operand[0]->Package.Count; Index++)
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{
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/* Get the current package element */
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ThisElement = Operand[0]->Package.Elements[Index];
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/* Treat any uninitialized (NULL) elements as non-matching */
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if (!ThisElement)
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{
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continue;
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}
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/*
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* Both match conditions must be satisfied. Execution of a continue
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* (proceed to next iteration of enclosing for loop) signifies a
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* non-match.
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*/
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if (!AcpiExDoMatch ((UINT32) Operand[1]->Integer.Value,
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ThisElement, Operand[2]))
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{
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continue;
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}
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if (!AcpiExDoMatch ((UINT32) Operand[3]->Integer.Value,
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ThisElement, Operand[4]))
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{
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continue;
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}
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/* Match found: Index is the return value */
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ReturnDesc->Integer.Value = Index;
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break;
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}
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break;
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case AML_LOAD_TABLE_OP:
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Status = AcpiExLoadTableOp (WalkState, &ReturnDesc);
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
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WalkState->Opcode));
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Status = AE_AML_BAD_OPCODE;
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goto Cleanup;
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}
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Cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE (Status))
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{
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AcpiUtRemoveReference (ReturnDesc);
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}
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/* Save return object on success */
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else
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{
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WalkState->ResultObj = ReturnDesc;
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}
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return_ACPI_STATUS (Status);
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}
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