/****************************************************************************** * * Module Name: exoparg6 - AML execution - opcodes with 6 arguments * *****************************************************************************/ /* * Copyright (C) 2000 - 2016, Intel Corp. * 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.h" #include "accommon.h" #include "acinterp.h" #include "acparser.h" #include "amlcode.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exoparg6") /*! * 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. !*/ /* Local prototypes */ static BOOLEAN AcpiExDoMatch ( UINT32 MatchOp, ACPI_OPERAND_OBJECT *PackageObj, ACPI_OPERAND_OBJECT *MatchObj); /******************************************************************************* * * FUNCTION: AcpiExDoMatch * * PARAMETERS: MatchOp - The AML match operand * PackageObj - Object from the target package * MatchObj - Object to be matched * * RETURN: TRUE if the match is successful, FALSE otherwise * * DESCRIPTION: Implements the low-level match for the ASL Match operator. * Package elements will be implicitly converted to the type of * the match object (Integer/Buffer/String). * ******************************************************************************/ static BOOLEAN AcpiExDoMatch ( UINT32 MatchOp, ACPI_OPERAND_OBJECT *PackageObj, ACPI_OPERAND_OBJECT *MatchObj) { BOOLEAN LogicalResult = TRUE; ACPI_STATUS Status; /* * Note: Since the PackageObj/MatchObj ordering is opposite to that of * the standard logical operators, we have to reverse them when we call * DoLogicalOp in order to make the implicit conversion rules work * correctly. However, this means we have to flip the entire equation * also. A bit ugly perhaps, but overall, better than fussing the * parameters around at runtime, over and over again. * * Below, P[i] refers to the package element, M refers to the Match object. */ switch (MatchOp) { case MATCH_MTR: /* Always true */ break; case MATCH_MEQ: /* * True if equal: (P[i] == M) * Change to: (M == P[i]) */ Status = AcpiExDoLogicalOp ( AML_LEQUAL_OP, MatchObj, PackageObj, &LogicalResult); if (ACPI_FAILURE (Status)) { return (FALSE); } break; case MATCH_MLE: /* * True if less than or equal: (P[i] <= M) (P[i] NotGreater than M) * Change to: (M >= P[i]) (M NotLess than P[i]) */ Status = AcpiExDoLogicalOp ( AML_LLESS_OP, MatchObj, PackageObj, &LogicalResult); if (ACPI_FAILURE (Status)) { return (FALSE); } LogicalResult = (BOOLEAN) !LogicalResult; break; case MATCH_MLT: /* * True if less than: (P[i] < M) * Change to: (M > P[i]) */ Status = AcpiExDoLogicalOp ( AML_LGREATER_OP, MatchObj, PackageObj, &LogicalResult); if (ACPI_FAILURE (Status)) { return (FALSE); } break; case MATCH_MGE: /* * True if greater than or equal: (P[i] >= M) (P[i] NotLess than M) * Change to: (M <= P[i]) (M NotGreater than P[i]) */ Status = AcpiExDoLogicalOp ( AML_LGREATER_OP, MatchObj, PackageObj, &LogicalResult); if (ACPI_FAILURE (Status)) { return (FALSE); } LogicalResult = (BOOLEAN)!LogicalResult; break; case MATCH_MGT: /* * True if greater than: (P[i] > M) * Change to: (M < P[i]) */ Status = AcpiExDoLogicalOp ( AML_LLESS_OP, MatchObj, PackageObj, &LogicalResult); if (ACPI_FAILURE (Status)) { return (FALSE); } break; default: /* Undefined */ return (FALSE); } return (LogicalResult); } /******************************************************************************* * * FUNCTION: AcpiExOpcode_6A_0T_1R * * PARAMETERS: WalkState - Current walk state * * RETURN: Status * * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value * ******************************************************************************/ ACPI_STATUS AcpiExOpcode_6A_0T_1R ( ACPI_WALK_STATE *WalkState) { ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; ACPI_OPERAND_OBJECT *ReturnDesc = NULL; ACPI_STATUS Status = AE_OK; UINT64 Index; ACPI_OPERAND_OBJECT *ThisElement; ACPI_FUNCTION_TRACE_STR (ExOpcode_6A_0T_1R, AcpiPsGetOpcodeName (WalkState->Opcode)); switch (WalkState->Opcode) { case AML_MATCH_OP: /* * Match (SearchPkg[0], MatchOp1[1], MatchObj1[2], * MatchOp2[3], MatchObj2[4], StartIndex[5]) */ /* Validate both Match Term Operators (MTR, MEQ, etc.) */ if ((Operand[1]->Integer.Value > MAX_MATCH_OPERATOR) || (Operand[3]->Integer.Value > MAX_MATCH_OPERATOR)) { ACPI_ERROR ((AE_INFO, "Match operator out of range")); Status = AE_AML_OPERAND_VALUE; goto Cleanup; } /* Get the package StartIndex, validate against the package length */ Index = Operand[5]->Integer.Value; if (Index >= Operand[0]->Package.Count) { ACPI_ERROR ((AE_INFO, "Index (0x%8.8X%8.8X) beyond package end (0x%X)", ACPI_FORMAT_UINT64 (Index), Operand[0]->Package.Count)); Status = AE_AML_PACKAGE_LIMIT; goto Cleanup; } /* Create an integer for the return value */ /* Default return value is ACPI_UINT64_MAX if no match found */ ReturnDesc = AcpiUtCreateIntegerObject (ACPI_UINT64_MAX); if (!ReturnDesc) { Status = AE_NO_MEMORY; goto Cleanup; } /* * Examine each element until a match is found. Both match conditions * must be satisfied for a match to occur. Within the loop, * "continue" signifies that the current element does not match * and the next should be examined. * * Upon finding a match, the loop will terminate via "break" at * the bottom. If it terminates "normally", MatchValue will be * ACPI_UINT64_MAX (Ones) (its initial value) indicating that no * match was found. */ for ( ; Index < Operand[0]->Package.Count; Index++) { /* Get the current package element */ ThisElement = Operand[0]->Package.Elements[Index]; /* Treat any uninitialized (NULL) elements as non-matching */ if (!ThisElement) { continue; } /* * Both match conditions must be satisfied. Execution of a continue * (proceed to next iteration of enclosing for loop) signifies a * non-match. */ if (!AcpiExDoMatch ((UINT32) Operand[1]->Integer.Value, ThisElement, Operand[2])) { continue; } if (!AcpiExDoMatch ((UINT32) Operand[3]->Integer.Value, ThisElement, Operand[4])) { continue; } /* Match found: Index is the return value */ ReturnDesc->Integer.Value = Index; break; } break; case AML_LOAD_TABLE_OP: Status = AcpiExLoadTableOp (WalkState, &ReturnDesc); break; default: ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", WalkState->Opcode)); Status = AE_AML_BAD_OPCODE; goto Cleanup; } Cleanup: /* Delete return object on error */ if (ACPI_FAILURE (Status)) { AcpiUtRemoveReference (ReturnDesc); } /* Save return object on success */ else { WalkState->ResultObj = ReturnDesc; } return_ACPI_STATUS (Status); }