/****************************************************************************** * * Module Name: asltransform - Parse tree transforms * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include #include "aslcompiler.y.h" #include #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME ("asltransform") /* Local prototypes */ static void TrTransformSubtree ( ACPI_PARSE_OBJECT *Op); static char * TrAmlGetNextTempName ( ACPI_PARSE_OBJECT *Op, UINT8 *TempCount); static void TrAmlInitLineNumbers ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Neighbor); static void TrAmlInitNode ( ACPI_PARSE_OBJECT *Op, UINT16 ParseOpcode); static void TrAmlSetSubtreeParent ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Parent); static void TrAmlInsertPeer ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *NewPeer); static void TrDoDefinitionBlock ( ACPI_PARSE_OBJECT *Op); static void TrDoSwitch ( ACPI_PARSE_OBJECT *StartNode); static void TrCheckForDuplicateCase ( ACPI_PARSE_OBJECT *CaseOp, ACPI_PARSE_OBJECT *Predicate1); static BOOLEAN TrCheckForBufferMatch ( ACPI_PARSE_OBJECT *Next1, ACPI_PARSE_OBJECT *Next2); static void TrDoMethod ( ACPI_PARSE_OBJECT *Op); /******************************************************************************* * * FUNCTION: TrAmlGetNextTempName * * PARAMETERS: Op - Current parse op * TempCount - Current temporary counter. Was originally * per-module; Currently per method, could be * expanded to per-scope. * * RETURN: A pointer to name (allocated here). * * DESCRIPTION: Generate an ACPI name of the form _T_x. These names are * reserved for use by the ASL compiler. (_T_0 through _T_Z) * ******************************************************************************/ static char * TrAmlGetNextTempName ( ACPI_PARSE_OBJECT *Op, UINT8 *TempCount) { char *TempName; if (*TempCount >= (10 + 26)) /* 0-35 valid: 0-9 and A-Z for TempName[3] */ { /* Too many temps */ AslError (ASL_ERROR, ASL_MSG_TOO_MANY_TEMPS, Op, NULL); return (NULL); } TempName = UtLocalCalloc (5); if (*TempCount < 10) /* 0-9 */ { TempName[3] = (char) (*TempCount + '0'); } else /* 10-35: A-Z */ { TempName[3] = (char) (*TempCount + ('A' - 10)); } (*TempCount)++; /* First three characters are always "_T_" */ TempName[0] = '_'; TempName[1] = 'T'; TempName[2] = '_'; return (TempName); } /******************************************************************************* * * FUNCTION: TrAmlInitLineNumbers * * PARAMETERS: Op - Op to be initialized * Neighbor - Op used for initialization values * * RETURN: None * * DESCRIPTION: Initialized the various line numbers for a parse node. * ******************************************************************************/ static void TrAmlInitLineNumbers ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Neighbor) { Op->Asl.EndLine = Neighbor->Asl.EndLine; Op->Asl.EndLogicalLine = Neighbor->Asl.EndLogicalLine; Op->Asl.LineNumber = Neighbor->Asl.LineNumber; Op->Asl.LogicalByteOffset = Neighbor->Asl.LogicalByteOffset; Op->Asl.LogicalLineNumber = Neighbor->Asl.LogicalLineNumber; } /******************************************************************************* * * FUNCTION: TrAmlInitNode * * PARAMETERS: Op - Op to be initialized * ParseOpcode - Opcode for this node * * RETURN: None * * DESCRIPTION: Initialize a node with the parse opcode and opcode name. * ******************************************************************************/ static void TrAmlInitNode ( ACPI_PARSE_OBJECT *Op, UINT16 ParseOpcode) { Op->Asl.ParseOpcode = ParseOpcode; UtSetParseOpName (Op); } /******************************************************************************* * * FUNCTION: TrAmlSetSubtreeParent * * PARAMETERS: Op - First node in a list of peer nodes * Parent - Parent of the subtree * * RETURN: None * * DESCRIPTION: Set the parent for all peer nodes in a subtree * ******************************************************************************/ static void TrAmlSetSubtreeParent ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Parent) { ACPI_PARSE_OBJECT *Next; Next = Op; while (Next) { Next->Asl.Parent = Parent; Next = Next->Asl.Next; } } /******************************************************************************* * * FUNCTION: TrAmlInsertPeer * * PARAMETERS: Op - First node in a list of peer nodes * NewPeer - Peer node to insert * * RETURN: None * * DESCRIPTION: Insert a new peer node into a list of peers. * ******************************************************************************/ static void TrAmlInsertPeer ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *NewPeer) { NewPeer->Asl.Next = Op->Asl.Next; Op->Asl.Next = NewPeer; } /******************************************************************************* * * FUNCTION: TrAmlTransformWalkBegin * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: None * * DESCRIPTION: Parse tree walk to generate both the AML opcodes and the AML * operands. * ******************************************************************************/ ACPI_STATUS TrAmlTransformWalkBegin ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { TrTransformSubtree (Op); return (AE_OK); } /******************************************************************************* * * FUNCTION: TrAmlTransformWalkEnd * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: None * * DESCRIPTION: Parse tree walk to generate both the AML opcodes and the AML * operands. * ******************************************************************************/ ACPI_STATUS TrAmlTransformWalkEnd ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { /* Save possible Externals list in the DefintionBlock Op */ if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK) { Op->Asl.Value.Arg = AslGbl_ExternalsListHead; AslGbl_ExternalsListHead = NULL; } return (AE_OK); } /******************************************************************************* * * FUNCTION: TrTransformSubtree * * PARAMETERS: Op - The parent parse node * * RETURN: None * * DESCRIPTION: Prepare nodes to be output as AML data and operands. The more * complex AML opcodes require processing of the child nodes * (arguments/operands). * ******************************************************************************/ static void TrTransformSubtree ( ACPI_PARSE_OBJECT *Op) { ACPI_PARSE_OBJECT *MethodOp; ACPI_NAMESTRING_INFO Info; if (Op->Asl.AmlOpcode == AML_RAW_DATA_BYTE) { return; } switch (Op->Asl.ParseOpcode) { case PARSEOP_DEFINITION_BLOCK: TrDoDefinitionBlock (Op); break; case PARSEOP_SWITCH: TrDoSwitch (Op); break; case PARSEOP_METHOD: TrDoMethod (Op); break; case PARSEOP_EXTERNAL: ExDoExternal (Op); break; case PARSEOP___METHOD__: /* Transform to a string op containing the parent method name */ Op->Asl.ParseOpcode = PARSEOP_STRING_LITERAL; UtSetParseOpName (Op); /* Find the parent control method op */ MethodOp = Op; while (MethodOp) { if (MethodOp->Asl.ParseOpcode == PARSEOP_METHOD) { /* First child contains the method name */ MethodOp = MethodOp->Asl.Child; Op->Asl.Value.String = MethodOp->Asl.Value.String; return; } MethodOp = MethodOp->Asl.Parent; } /* At the root, invocation not within a control method */ Op->Asl.Value.String = "\\"; break; case PARSEOP_NAMESTRING: /* * A NameString can be up to 255 (0xFF) individual NameSegs maximum * (with 254 dot separators) - as per the ACPI specification. Note: * Cannot check for NumSegments == 0 because things like * Scope(\) are legal and OK. */ Info.ExternalName = Op->Asl.Value.String; AcpiNsGetInternalNameLength (&Info); if (Info.NumSegments > 255) { AslError (ASL_ERROR, ASL_MSG_NAMESTRING_LENGTH, Op, NULL); } break; case PARSEOP_UNLOAD: AslError (ASL_WARNING, ASL_MSG_UNLOAD, Op, NULL); break; case PARSEOP_SLEEP: /* Remark for very long sleep values */ if (Op->Asl.Child->Asl.Value.Integer > 1000) { AslError (ASL_REMARK, ASL_MSG_LONG_SLEEP, Op, NULL); } break; case PARSEOP_PROCESSOR: AslError (ASL_WARNING, ASL_MSG_LEGACY_PROCESSOR_OP, Op, Op->Asl.ExternalName); break; case PARSEOP_OBJECTTYPE_DDB: AslError (ASL_WARNING, ASL_MSG_LEGACY_DDB_TYPE, Op, Op->Asl.ExternalName); break; default: /* Nothing to do here for other opcodes */ break; } } /******************************************************************************* * * FUNCTION: TrDoDefinitionBlock * * PARAMETERS: Op - Parse node * * RETURN: None * * DESCRIPTION: Find the end of the definition block and set a global to this * node. It is used by the compiler to insert compiler-generated * names at the root level of the namespace. * ******************************************************************************/ static void TrDoDefinitionBlock ( ACPI_PARSE_OBJECT *Op) { ACPI_PARSE_OBJECT *Next; UINT32 i; /* Reset external list when starting a definition block */ AslGbl_ExternalsListHead = NULL; Next = Op->Asl.Child; for (i = 0; i < 5; i++) { Next = Next->Asl.Next; if (i == 0) { /* * This is the table signature. Only the DSDT can be assumed * to be at the root of the namespace; Therefore, namepath * optimization can only be performed on the DSDT. */ if (!ACPI_COMPARE_NAMESEG (Next->Asl.Value.String, ACPI_SIG_DSDT)) { AslGbl_ReferenceOptimizationFlag = FALSE; } } } AslGbl_FirstLevelInsertionNode = Next; } /******************************************************************************* * * FUNCTION: TrDoSwitch * * PARAMETERS: StartNode - Parse node for SWITCH * * RETURN: None * * DESCRIPTION: Translate ASL SWITCH statement to if/else pairs. There is * no actual AML opcode for SWITCH -- it must be simulated. * ******************************************************************************/ static void TrDoSwitch ( ACPI_PARSE_OBJECT *StartNode) { ACPI_PARSE_OBJECT *Next; ACPI_PARSE_OBJECT *CaseOp = NULL; ACPI_PARSE_OBJECT *CaseBlock = NULL; ACPI_PARSE_OBJECT *DefaultOp = NULL; ACPI_PARSE_OBJECT *CurrentParentNode; ACPI_PARSE_OBJECT *Conditional = NULL; ACPI_PARSE_OBJECT *Predicate; ACPI_PARSE_OBJECT *Peer; ACPI_PARSE_OBJECT *NewOp; ACPI_PARSE_OBJECT *NewOp2; ACPI_PARSE_OBJECT *MethodOp; ACPI_PARSE_OBJECT *StoreOp; ACPI_PARSE_OBJECT *BreakOp; ACPI_PARSE_OBJECT *BufferOp; char *PredicateValueName; UINT16 Index; UINT32 Btype; /* Start node is the Switch() node */ CurrentParentNode = StartNode; /* Create a new temp name of the form _T_x */ PredicateValueName = TrAmlGetNextTempName (StartNode, &AslGbl_TempCount); if (!PredicateValueName) { return; } /* First child is the Switch() predicate */ Next = StartNode->Asl.Child; /* * Examine the return type of the Switch Value - * must be Integer/Buffer/String */ Index = (UINT16) (Next->Asl.ParseOpcode - ASL_PARSE_OPCODE_BASE); Btype = AslKeywordMapping[Index].AcpiBtype; if ((Btype != ACPI_BTYPE_INTEGER) && (Btype != ACPI_BTYPE_STRING) && (Btype != ACPI_BTYPE_BUFFER)) { AslError (ASL_WARNING, ASL_MSG_SWITCH_TYPE, Next, NULL); Btype = ACPI_BTYPE_INTEGER; } /* CASE statements start at next child */ Peer = Next->Asl.Next; while (Peer) { Next = Peer; Peer = Next->Asl.Next; if (Next->Asl.ParseOpcode == PARSEOP_CASE) { TrCheckForDuplicateCase (Next, Next->Asl.Child); if (CaseOp) { /* Add an ELSE to complete the previous CASE */ NewOp = TrCreateLeafOp (PARSEOP_ELSE); NewOp->Asl.Parent = Conditional->Asl.Parent; TrAmlInitLineNumbers (NewOp, NewOp->Asl.Parent); /* Link ELSE node as a peer to the previous IF */ TrAmlInsertPeer (Conditional, NewOp); CurrentParentNode = NewOp; } CaseOp = Next; Conditional = CaseOp; CaseBlock = CaseOp->Asl.Child->Asl.Next; Conditional->Asl.Child->Asl.Next = NULL; Predicate = CaseOp->Asl.Child; if ((Predicate->Asl.ParseOpcode == PARSEOP_PACKAGE) || (Predicate->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)) { /* * Convert the package declaration to this form: * * If (LNotEqual (Match (Package(){}, * MEQ, _T_x, MTR, Zero, Zero), Ones)) */ NewOp2 = TrCreateLeafOp (PARSEOP_MATCHTYPE_MEQ); Predicate->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Conditional); NewOp = NewOp2; NewOp2 = TrCreateValuedLeafOp (PARSEOP_NAMESTRING, (UINT64) ACPI_TO_INTEGER (PredicateValueName)); NewOp->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Predicate); NewOp = NewOp2; NewOp2 = TrCreateLeafOp (PARSEOP_MATCHTYPE_MTR); NewOp->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Predicate); NewOp = NewOp2; NewOp2 = TrCreateLeafOp (PARSEOP_ZERO); NewOp->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Predicate); NewOp = NewOp2; NewOp2 = TrCreateLeafOp (PARSEOP_ZERO); NewOp->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Predicate); NewOp2 = TrCreateLeafOp (PARSEOP_MATCH); NewOp2->Asl.Child = Predicate; /* PARSEOP_PACKAGE */ TrAmlInitLineNumbers (NewOp2, Conditional); TrAmlSetSubtreeParent (Predicate, NewOp2); NewOp = NewOp2; NewOp2 = TrCreateLeafOp (PARSEOP_ONES); NewOp->Asl.Next = NewOp2; TrAmlInitLineNumbers (NewOp2, Conditional); NewOp2 = TrCreateLeafOp (PARSEOP_LEQUAL); NewOp2->Asl.Child = NewOp; NewOp->Asl.Parent = NewOp2; TrAmlInitLineNumbers (NewOp2, Conditional); TrAmlSetSubtreeParent (NewOp, NewOp2); NewOp = NewOp2; NewOp2 = TrCreateLeafOp (PARSEOP_LNOT); NewOp2->Asl.Child = NewOp; NewOp2->Asl.Parent = Conditional; NewOp->Asl.Parent = NewOp2; TrAmlInitLineNumbers (NewOp2, Conditional); Conditional->Asl.Child = NewOp2; NewOp2->Asl.Next = CaseBlock; } else { /* * Integer and Buffer case. * * Change CaseOp() to: If (LEqual (SwitchValue, CaseValue)) {...} * Note: SwitchValue is first to allow the CaseValue to be implicitly * converted to the type of SwitchValue if necessary. * * CaseOp->Child is the case value * CaseOp->Child->Peer is the beginning of the case block */ NewOp = TrCreateValuedLeafOp (PARSEOP_NAMESTRING, (UINT64) ACPI_TO_INTEGER (PredicateValueName)); NewOp->Asl.Next = Predicate; TrAmlInitLineNumbers (NewOp, Predicate); NewOp2 = TrCreateLeafOp (PARSEOP_LEQUAL); NewOp2->Asl.Parent = Conditional; NewOp2->Asl.Child = NewOp; TrAmlInitLineNumbers (NewOp2, Conditional); TrAmlSetSubtreeParent (NewOp, NewOp2); Predicate = NewOp2; Predicate->Asl.Next = CaseBlock; TrAmlSetSubtreeParent (Predicate, Conditional); Conditional->Asl.Child = Predicate; } /* Reinitialize the CASE node to an IF node */ TrAmlInitNode (Conditional, PARSEOP_IF); /* * The first CASE(IF) is not nested under an ELSE. * All other CASEs are children of a parent ELSE. */ if (CurrentParentNode == StartNode) { Conditional->Asl.Next = NULL; } else { /* * The IF is a child of previous IF/ELSE. It * is therefore without peer. */ CurrentParentNode->Asl.Child = Conditional; Conditional->Asl.Parent = CurrentParentNode; Conditional->Asl.Next = NULL; } } else if (Next->Asl.ParseOpcode == PARSEOP_DEFAULT) { if (DefaultOp) { /* * More than one Default * (Parser does not catch this, must check here) */ AslError (ASL_ERROR, ASL_MSG_MULTIPLE_DEFAULT, Next, NULL); } else { /* Save the DEFAULT node for later, after CASEs */ DefaultOp = Next; } } else { /* Unknown peer opcode */ AcpiOsPrintf ("Unknown parse opcode for switch statement: %s (%u)\n", Next->Asl.ParseOpName, Next->Asl.ParseOpcode); } } /* Add the default case at the end of the if/else construct */ if (DefaultOp) { /* If no CASE statements, this is an error - see below */ if (CaseOp) { /* Convert the DEFAULT node to an ELSE */ TrAmlInitNode (DefaultOp, PARSEOP_ELSE); DefaultOp->Asl.Parent = Conditional->Asl.Parent; /* Link ELSE node as a peer to the previous IF */ TrAmlInsertPeer (Conditional, DefaultOp); } } if (!CaseOp) { AslError (ASL_ERROR, ASL_MSG_NO_CASES, StartNode, NULL); } /* * Create a Name(_T_x, ...) statement. This statement must appear at the * method level, in case a loop surrounds the switch statement and could * cause the name to be created twice (error). */ /* Create the Name node */ Predicate = StartNode->Asl.Child; NewOp = TrCreateLeafOp (PARSEOP_NAME); TrAmlInitLineNumbers (NewOp, StartNode); /* Find the parent method */ Next = StartNode; while ((Next->Asl.ParseOpcode != PARSEOP_METHOD) && (Next->Asl.ParseOpcode != PARSEOP_DEFINITION_BLOCK)) { Next = Next->Asl.Parent; } MethodOp = Next; NewOp->Asl.CompileFlags |= OP_COMPILER_EMITTED; NewOp->Asl.Parent = Next; /* Insert name after the method name and arguments */ Next = Next->Asl.Child; /* Name */ Next = Next->Asl.Next; /* NumArgs */ Next = Next->Asl.Next; /* SerializeRule */ /* * If method is not Serialized, we must make is so, because of the way * that Switch() must be implemented -- we cannot allow multiple threads * to execute this method concurrently since we need to create local * temporary name(s). */ if (Next->Asl.ParseOpcode != PARSEOP_SERIALIZERULE_SERIAL) { AslError (ASL_REMARK, ASL_MSG_SERIALIZED, MethodOp, "Due to use of Switch operator"); Next->Asl.ParseOpcode = PARSEOP_SERIALIZERULE_SERIAL; } Next = Next->Asl.Next; /* SyncLevel */ Next = Next->Asl.Next; /* ReturnType */ Next = Next->Asl.Next; /* ParameterTypes */ TrAmlInsertPeer (Next, NewOp); TrAmlInitLineNumbers (NewOp, Next); /* Create the NameSeg child for the Name node */ NewOp2 = TrCreateValuedLeafOp (PARSEOP_NAMESEG, (UINT64) ACPI_TO_INTEGER (PredicateValueName)); TrAmlInitLineNumbers (NewOp2, NewOp); NewOp2->Asl.CompileFlags |= OP_IS_NAME_DECLARATION; NewOp->Asl.Child = NewOp2; /* Create the initial value for the Name. Btype was already validated above */ switch (Btype) { case ACPI_BTYPE_INTEGER: NewOp2->Asl.Next = TrCreateValuedLeafOp (PARSEOP_ZERO, (UINT64) 0); TrAmlInitLineNumbers (NewOp2->Asl.Next, NewOp); break; case ACPI_BTYPE_STRING: NewOp2->Asl.Next = TrCreateValuedLeafOp (PARSEOP_STRING_LITERAL, (UINT64) ACPI_TO_INTEGER ("")); TrAmlInitLineNumbers (NewOp2->Asl.Next, NewOp); break; case ACPI_BTYPE_BUFFER: (void) TrLinkPeerOp (NewOp2, TrCreateValuedLeafOp (PARSEOP_BUFFER, (UINT64) 0)); Next = NewOp2->Asl.Next; TrAmlInitLineNumbers (Next, NewOp2); (void) TrLinkOpChildren (Next, 1, TrCreateValuedLeafOp (PARSEOP_ZERO, (UINT64) 1)); TrAmlInitLineNumbers (Next->Asl.Child, Next); BufferOp = TrCreateValuedLeafOp (PARSEOP_DEFAULT_ARG, (UINT64) 0); TrAmlInitLineNumbers (BufferOp, Next->Asl.Child); (void) TrLinkPeerOp (Next->Asl.Child, BufferOp); TrAmlSetSubtreeParent (Next->Asl.Child, Next); break; default: break; } TrAmlSetSubtreeParent (NewOp2, NewOp); /* * Transform the Switch() into a While(One)-Break node. * And create a Store() node which will be used to save the * Switch() value. The store is of the form: Store (Value, _T_x) * where _T_x is the temp variable. */ TrAmlInitNode (StartNode, PARSEOP_WHILE); NewOp = TrCreateLeafOp (PARSEOP_ONE); TrAmlInitLineNumbers (NewOp, StartNode); NewOp->Asl.Next = Predicate->Asl.Next; NewOp->Asl.Parent = StartNode; StartNode->Asl.Child = NewOp; /* Create a Store() node */ StoreOp = TrCreateLeafOp (PARSEOP_STORE); TrAmlInitLineNumbers (StoreOp, NewOp); StoreOp->Asl.Parent = StartNode; TrAmlInsertPeer (NewOp, StoreOp); /* Complete the Store subtree */ StoreOp->Asl.Child = Predicate; Predicate->Asl.Parent = StoreOp; NewOp = TrCreateValuedLeafOp (PARSEOP_NAMESEG, (UINT64) ACPI_TO_INTEGER (PredicateValueName)); TrAmlInitLineNumbers (NewOp, StoreOp); NewOp->Asl.Parent = StoreOp; Predicate->Asl.Next = NewOp; /* Create a Break() node and insert it into the end of While() */ Conditional = StartNode->Asl.Child; while (Conditional->Asl.Next) { Conditional = Conditional->Asl.Next; } BreakOp = TrCreateLeafOp (PARSEOP_BREAK); TrAmlInitLineNumbers (BreakOp, NewOp); BreakOp->Asl.Parent = StartNode; TrAmlInsertPeer (Conditional, BreakOp); } /******************************************************************************* * * FUNCTION: TrCheckForDuplicateCase * * PARAMETERS: CaseOp - Parse node for first Case statement in list * Predicate1 - Case value for the input CaseOp * * RETURN: None * * DESCRIPTION: Check for duplicate case values. Currently, only handles * Integers, Strings and Buffers. No support for Package objects. * ******************************************************************************/ static void TrCheckForDuplicateCase ( ACPI_PARSE_OBJECT *CaseOp, ACPI_PARSE_OBJECT *Predicate1) { ACPI_PARSE_OBJECT *Next; ACPI_PARSE_OBJECT *Predicate2; /* Walk the list of CASE opcodes */ Next = CaseOp->Asl.Next; while (Next) { if (Next->Asl.ParseOpcode == PARSEOP_CASE) { /* Emit error only once */ if (Next->Asl.CompileFlags & OP_IS_DUPLICATE) { goto NextCase; } /* Check for a duplicate plain integer */ Predicate2 = Next->Asl.Child; if ((Predicate1->Asl.ParseOpcode == PARSEOP_INTEGER) && (Predicate2->Asl.ParseOpcode == PARSEOP_INTEGER)) { if (Predicate1->Asl.Value.Integer == Predicate2->Asl.Value.Integer) { goto FoundDuplicate; } } /* Check for pairs of the constants ZERO, ONE, ONES */ else if (((Predicate1->Asl.ParseOpcode == PARSEOP_ZERO) && (Predicate2->Asl.ParseOpcode == PARSEOP_ZERO)) || ((Predicate1->Asl.ParseOpcode == PARSEOP_ONE) && (Predicate2->Asl.ParseOpcode == PARSEOP_ONE)) || ((Predicate1->Asl.ParseOpcode == PARSEOP_ONES) && (Predicate2->Asl.ParseOpcode == PARSEOP_ONES))) { goto FoundDuplicate; } /* Check for a duplicate string constant (literal) */ else if ((Predicate1->Asl.ParseOpcode == PARSEOP_STRING_LITERAL) && (Predicate2->Asl.ParseOpcode == PARSEOP_STRING_LITERAL)) { if (!strcmp (Predicate1->Asl.Value.String, Predicate2->Asl.Value.String)) { goto FoundDuplicate; } } /* Check for a duplicate buffer constant */ else if ((Predicate1->Asl.ParseOpcode == PARSEOP_BUFFER) && (Predicate2->Asl.ParseOpcode == PARSEOP_BUFFER)) { if (TrCheckForBufferMatch (Predicate1->Asl.Child, Predicate2->Asl.Child)) { goto FoundDuplicate; } } } goto NextCase; FoundDuplicate: /* Emit error message only once */ Next->Asl.CompileFlags |= OP_IS_DUPLICATE; AslDualParseOpError (ASL_ERROR, ASL_MSG_DUPLICATE_CASE, Next, Next->Asl.Value.String, ASL_MSG_CASE_FOUND_HERE, CaseOp, CaseOp->Asl.ExternalName); NextCase: Next = Next->Asl.Next; } } /******************************************************************************* * * FUNCTION: TrBufferIsAllZero * * PARAMETERS: Op - Parse node for first opcode in buffer initializer * list * * RETURN: TRUE if buffer contains all zeros or a DEFAULT_ARG * * DESCRIPTION: Check for duplicate Buffer case values. * ******************************************************************************/ static BOOLEAN TrBufferIsAllZero ( ACPI_PARSE_OBJECT *Op) { while (Op) { if (Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) { return (TRUE); } else if (Op->Asl.Value.Integer != 0) { return (FALSE); } Op = Op->Asl.Next; } return (TRUE); } /******************************************************************************* * * FUNCTION: TrCheckForBufferMatch * * PARAMETERS: Next1 - Parse node for first opcode in first buffer list * (The DEFAULT_ARG or INTEGER node) * Next2 - Parse node for first opcode in second buffer list * (The DEFAULT_ARG or INTEGER node) * * RETURN: TRUE if buffers match, FALSE otherwise * * DESCRIPTION: Check for duplicate Buffer case values. * ******************************************************************************/ static BOOLEAN TrCheckForBufferMatch ( ACPI_PARSE_OBJECT *NextOp1, ACPI_PARSE_OBJECT *NextOp2) { /* * The buffer length can be a DEFAULT_ARG or INTEGER. If any of the nodes * are DEFAULT_ARG, it means that the length has yet to be computed. * However, the initializer list can be compared to determine if these two * buffers match. */ if ((NextOp1->Asl.ParseOpcode == PARSEOP_INTEGER && NextOp2->Asl.ParseOpcode == PARSEOP_INTEGER) && NextOp1->Asl.Value.Integer != NextOp2->Asl.Value.Integer) { return (FALSE); } /* * Buffers that have explicit lengths but no initializer lists are * filled with zeros at runtime. This is equivalent to buffers that have the * same length that are filled with zeros. * * In other words, the following buffers are equivalent: * * Buffer(0x4) {} * Buffer() {0x0, 0x0, 0x0, 0x0} * * This statement checks for matches where one buffer does not have an * initializer list and another buffer contains all zeros. */ if (NextOp1->Asl.ParseOpcode != NextOp2->Asl.ParseOpcode && TrBufferIsAllZero (NextOp1->Asl.Next) && TrBufferIsAllZero (NextOp2->Asl.Next)) { return (TRUE); } /* Start at the BYTECONST initializer node list */ NextOp1 = NextOp1->Asl.Next; NextOp2 = NextOp2->Asl.Next; /* * Walk both lists until either a mismatch is found, or one or more * end-of-lists are found */ while (NextOp1 && NextOp2) { if ((NextOp1->Asl.ParseOpcode == PARSEOP_STRING_LITERAL) && (NextOp2->Asl.ParseOpcode == PARSEOP_STRING_LITERAL)) { if (!strcmp (NextOp1->Asl.Value.String, NextOp2->Asl.Value.String)) { return (TRUE); } else { return (FALSE); } } if ((UINT8) NextOp1->Asl.Value.Integer != (UINT8) NextOp2->Asl.Value.Integer) { return (FALSE); } NextOp1 = NextOp1->Asl.Next; NextOp2 = NextOp2->Asl.Next; } /* Not a match if one of the lists is not at end-of-list */ if (NextOp1 || NextOp2) { return (FALSE); } /* Otherwise, the buffers match */ return (TRUE); } /******************************************************************************* * * FUNCTION: TrDoMethod * * PARAMETERS: Op - Parse node for SWITCH * * RETURN: None * * DESCRIPTION: Determine that parameter count of an ASL method node by * translating the parameter count parse node from * PARSEOP_DEFAULT_ARG to PARSEOP_BYTECONST. * ******************************************************************************/ static void TrDoMethod ( ACPI_PARSE_OBJECT *Op) { ACPI_PARSE_OBJECT *ArgCountOp; UINT8 ArgCount; ACPI_PARSE_OBJECT *ParameterOp; /* * TBD: Zero the tempname (_T_x) count. Probably shouldn't be a global, * however */ AslGbl_TempCount = 0; ArgCountOp = Op->Asl.Child->Asl.Next; if (ArgCountOp->Asl.ParseOpcode == PARSEOP_BYTECONST) { /* * Parameter count for this method has already been recorded in the * method declaration. */ return; } /* * Parameter count has been omitted in the method declaration. * Count the amount of arguments here. */ ParameterOp = ArgCountOp->Asl.Next->Asl.Next->Asl.Next->Asl.Next; if (ParameterOp->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) { ArgCount = 0; ParameterOp = ParameterOp->Asl.Child; while (ParameterOp) { ParameterOp = ParameterOp->Asl.Next; ArgCount++; } ArgCountOp->Asl.Value.Integer = ArgCount; ArgCountOp->Asl.ParseOpcode = PARSEOP_BYTECONST; } else { /* * Method parameters can be counted by analyzing the Parameter type * list. If the Parameter list contains more than 1 parameter, it * is nested under PARSEOP_DEFAULT_ARG. When there is only 1 * parameter, the parse tree contains a single node representing * that type. */ ArgCountOp->Asl.Value.Integer = 1; ArgCountOp->Asl.ParseOpcode = PARSEOP_BYTECONST; } }