| 0,0 → 1,563 |
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| |
| /****************************************************************************** |
| * |
| * Module Name: aslfold - Constant folding |
| * |
| *****************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, 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. |
| * |
| *****************************************************************************/ |
| |
| |
| #include "aslcompiler.h" |
| #include "aslcompiler.y.h" |
| #include "amlcode.h" |
| |
| #include "acdispat.h" |
| #include "acparser.h" |
| |
| #define _COMPONENT ACPI_COMPILER |
| ACPI_MODULE_NAME ("aslfold") |
| |
| /* Local prototypes */ |
| |
| static ACPI_STATUS |
| OpcAmlEvaluationWalk1 ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context); |
| |
| static ACPI_STATUS |
| OpcAmlEvaluationWalk2 ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context); |
| |
| static ACPI_STATUS |
| OpcAmlCheckForConstant ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context); |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: OpcAmlEvaluationWalk1 |
| * |
| * PARAMETERS: ASL_WALK_CALLBACK |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Descending callback for AML execution of constant subtrees |
| * |
| ******************************************************************************/ |
| |
| static ACPI_STATUS |
| OpcAmlEvaluationWalk1 ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context) |
| { |
| ACPI_WALK_STATE *WalkState = Context; |
| ACPI_STATUS Status; |
| ACPI_PARSE_OBJECT *OutOp; |
| |
| |
| WalkState->Op = Op; |
| WalkState->Opcode = Op->Common.AmlOpcode; |
| WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); |
| |
| /* Copy child pointer to Arg for compatibility with Interpreter */ |
| |
| if (Op->Asl.Child) |
| { |
| Op->Common.Value.Arg = Op->Asl.Child; |
| } |
| |
| /* Call AML dispatcher */ |
| |
| Status = AcpiDsExecBeginOp (WalkState, &OutOp); |
| if (ACPI_FAILURE (Status)) |
| { |
| AcpiOsPrintf ("Constant interpretation failed - %s\n", |
| AcpiFormatException (Status)); |
| } |
| |
| return (Status); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: OpcAmlEvaluationWalk2 |
| * |
| * PARAMETERS: ASL_WALK_CALLBACK |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Ascending callback for AML execution of constant subtrees |
| * |
| ******************************************************************************/ |
| |
| static ACPI_STATUS |
| OpcAmlEvaluationWalk2 ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context) |
| { |
| ACPI_WALK_STATE *WalkState = Context; |
| ACPI_STATUS Status; |
| |
| |
| WalkState->Op = Op; |
| WalkState->Opcode = Op->Common.AmlOpcode; |
| WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); |
| |
| /* Copy child pointer to Arg for compatibility with Interpreter */ |
| |
| if (Op->Asl.Child) |
| { |
| Op->Common.Value.Arg = Op->Asl.Child; |
| } |
| |
| /* Call AML dispatcher */ |
| |
| Status = AcpiDsExecEndOp (WalkState); |
| if (ACPI_FAILURE (Status)) |
| { |
| AcpiOsPrintf ("Constant interpretation failed - %s\n", |
| AcpiFormatException (Status)); |
| } |
| |
| return (Status); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: OpcAmlCheckForConstant |
| * |
| * PARAMETERS: ASL_WALK_CALLBACK |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Check one Op for a type 3/4/5 AML opcode |
| * |
| ******************************************************************************/ |
| |
| static ACPI_STATUS |
| OpcAmlCheckForConstant ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context) |
| { |
| ACPI_WALK_STATE *WalkState = Context; |
| |
| |
| WalkState->Op = Op; |
| WalkState->Opcode = Op->Common.AmlOpcode; |
| WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); |
| |
| DbgPrint (ASL_PARSE_OUTPUT, "[%.4d] Opcode: %12.12s ", |
| Op->Asl.LogicalLineNumber, Op->Asl.ParseOpName); |
| |
| if (!(WalkState->OpInfo->Flags & AML_CONSTANT)) |
| { |
| /* The opcode is not a Type 3/4/5 opcode */ |
| |
| if (Op->Asl.CompileFlags & NODE_IS_TARGET) |
| { |
| DbgPrint (ASL_PARSE_OUTPUT, |
| "**** Valid Target, cannot reduce ****\n"); |
| } |
| else |
| { |
| DbgPrint (ASL_PARSE_OUTPUT, |
| "**** Not a Type 3/4/5 opcode ****\n"); |
| } |
| |
| if (WalkState->WalkType == ACPI_WALK_CONST_OPTIONAL) |
| { |
| /* |
| * We are looking at at normal expression to see if it can be |
| * reduced. It can't. No error |
| */ |
| return (AE_TYPE); |
| } |
| |
| /* |
| * This is an expression that MUST reduce to a constant, and it |
| * can't be reduced. This is an error |
| */ |
| if (Op->Asl.CompileFlags & NODE_IS_TARGET) |
| { |
| AslError (ASL_ERROR, ASL_MSG_INVALID_TARGET, Op, |
| Op->Asl.ParseOpName); |
| } |
| else |
| { |
| AslError (ASL_ERROR, ASL_MSG_INVALID_CONSTANT_OP, Op, |
| Op->Asl.ParseOpName); |
| } |
| |
| return (AE_TYPE); |
| } |
| |
| /* Debug output */ |
| |
| DbgPrint (ASL_PARSE_OUTPUT, "TYPE_345"); |
| |
| if (Op->Asl.CompileFlags & NODE_IS_TARGET) |
| { |
| DbgPrint (ASL_PARSE_OUTPUT, " TARGET"); |
| } |
| if (Op->Asl.CompileFlags & NODE_IS_TERM_ARG) |
| { |
| DbgPrint (ASL_PARSE_OUTPUT, " TERMARG"); |
| } |
| DbgPrint (ASL_PARSE_OUTPUT, "\n"); |
| |
| return (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: OpcAmlConstantWalk |
| * |
| * PARAMETERS: ASL_WALK_CALLBACK |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Reduce an Op and its subtree to a constant if possible |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| OpcAmlConstantWalk ( |
| ACPI_PARSE_OBJECT *Op, |
| UINT32 Level, |
| void *Context) |
| { |
| ACPI_WALK_STATE *WalkState; |
| ACPI_STATUS Status = AE_OK; |
| ACPI_OPERAND_OBJECT *ObjDesc; |
| ACPI_PARSE_OBJECT *RootOp; |
| ACPI_PARSE_OBJECT *OriginalParentOp; |
| UINT8 WalkType; |
| |
| |
| /* |
| * Only interested in subtrees that could possibly contain |
| * expressions that can be evaluated at this time |
| */ |
| if ((!(Op->Asl.CompileFlags & NODE_COMPILE_TIME_CONST)) || |
| (Op->Asl.CompileFlags & NODE_IS_TARGET)) |
| { |
| return (AE_OK); |
| } |
| |
| /* Set the walk type based on the reduction used for this op */ |
| |
| if (Op->Asl.CompileFlags & NODE_IS_TERM_ARG) |
| { |
| /* Op is a TermArg, constant folding is merely optional */ |
| |
| if (!Gbl_FoldConstants) |
| { |
| return (AE_CTRL_DEPTH); |
| } |
| |
| WalkType = ACPI_WALK_CONST_OPTIONAL; |
| } |
| else |
| { |
| /* Op is a DataObject, the expression MUST reduced to a constant */ |
| |
| WalkType = ACPI_WALK_CONST_REQUIRED; |
| } |
| |
| /* Create a new walk state */ |
| |
| WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); |
| if (!WalkState) |
| { |
| return AE_NO_MEMORY; |
| } |
| |
| WalkState->NextOp = NULL; |
| WalkState->Params = NULL; |
| WalkState->CallerReturnDesc = &ObjDesc; |
| WalkState->WalkType = WalkType; |
| |
| /* |
| * Examine the entire subtree -- all nodes must be constants |
| * or type 3/4/5 opcodes |
| */ |
| Status = TrWalkParseTree (Op, ASL_WALK_VISIT_DOWNWARD, |
| OpcAmlCheckForConstant, NULL, WalkState); |
| |
| /* |
| * Did we find an entire subtree that contains all constants and type 3/4/5 |
| * opcodes? (Only AE_OK or AE_TYPE returned from above) |
| */ |
| if (Status == AE_TYPE) |
| { |
| /* Subtree cannot be reduced to a constant */ |
| |
| if (WalkState->WalkType == ACPI_WALK_CONST_OPTIONAL) |
| { |
| AcpiDsDeleteWalkState (WalkState); |
| return (AE_OK); |
| } |
| |
| /* Don't descend any further, and use a default "constant" value */ |
| |
| Status = AE_CTRL_DEPTH; |
| } |
| else |
| { |
| /* Subtree can be reduced */ |
| |
| /* Allocate a new temporary root for this subtree */ |
| |
| RootOp = TrAllocateNode (PARSEOP_INTEGER); |
| if (!RootOp) |
| { |
| return (AE_NO_MEMORY); |
| } |
| |
| RootOp->Common.AmlOpcode = AML_INT_EVAL_SUBTREE_OP; |
| |
| OriginalParentOp = Op->Common.Parent; |
| Op->Common.Parent = RootOp; |
| |
| /* Hand off the subtree to the AML interpreter */ |
| |
| Status = TrWalkParseTree (Op, ASL_WALK_VISIT_TWICE, |
| OpcAmlEvaluationWalk1, OpcAmlEvaluationWalk2, WalkState); |
| Op->Common.Parent = OriginalParentOp; |
| |
| /* TBD: we really *should* release the RootOp node */ |
| |
| if (ACPI_SUCCESS (Status)) |
| { |
| TotalFolds++; |
| |
| /* Get the final result */ |
| |
| Status = AcpiDsResultPop (&ObjDesc, WalkState); |
| } |
| } |
| |
| if (ACPI_FAILURE (Status)) |
| { |
| /* We could not resolve the subtree for some reason */ |
| |
| AslCoreSubsystemError (Op, Status, |
| "Failure during constant evaluation", FALSE); |
| AslError (ASL_ERROR, ASL_MSG_CONSTANT_EVALUATION, Op, |
| Op->Asl.ParseOpName); |
| |
| /* Set the subtree value to ZERO anyway. Eliminates further errors */ |
| |
| Op->Asl.ParseOpcode = PARSEOP_INTEGER; |
| Op->Common.Value.Integer = 0; |
| OpcSetOptimalIntegerSize (Op); |
| } |
| else |
| { |
| AslError (ASL_OPTIMIZATION, ASL_MSG_CONSTANT_FOLDED, Op, |
| Op->Asl.ParseOpName); |
| |
| /* |
| * Because we know we executed type 3/4/5 opcodes above, we know that |
| * the result must be either an Integer, String, or Buffer. |
| */ |
| switch (ObjDesc->Common.Type) |
| { |
| case ACPI_TYPE_INTEGER: |
| |
| Op->Asl.ParseOpcode = PARSEOP_INTEGER; |
| Op->Common.Value.Integer = ObjDesc->Integer.Value; |
| OpcSetOptimalIntegerSize (Op); |
| |
| DbgPrint (ASL_PARSE_OUTPUT, |
| "Constant expression reduced to (INTEGER) %8.8X%8.8X\n", |
| ACPI_FORMAT_UINT64 (ObjDesc->Integer.Value)); |
| break; |
| |
| |
| case ACPI_TYPE_STRING: |
| |
| Op->Asl.ParseOpcode = PARSEOP_STRING_LITERAL; |
| Op->Common.AmlOpcode = AML_STRING_OP; |
| Op->Asl.AmlLength = ACPI_STRLEN (ObjDesc->String.Pointer) + 1; |
| Op->Common.Value.String = ObjDesc->String.Pointer; |
| |
| DbgPrint (ASL_PARSE_OUTPUT, |
| "Constant expression reduced to (STRING) %s\n", |
| Op->Common.Value.String); |
| |
| break; |
| |
| |
| case ACPI_TYPE_BUFFER: |
| |
| Op->Asl.ParseOpcode = PARSEOP_BUFFER; |
| Op->Common.AmlOpcode = AML_BUFFER_OP; |
| Op->Asl.CompileFlags = NODE_AML_PACKAGE; |
| UtSetParseOpName (Op); |
| |
| /* Child node is the buffer length */ |
| |
| RootOp = TrAllocateNode (PARSEOP_INTEGER); |
| |
| RootOp->Asl.AmlOpcode = AML_DWORD_OP; |
| RootOp->Asl.Value.Integer = ObjDesc->Buffer.Length; |
| RootOp->Asl.Parent = Op; |
| |
| (void) OpcSetOptimalIntegerSize (RootOp); |
| |
| Op->Asl.Child = RootOp; |
| Op = RootOp; |
| UtSetParseOpName (Op); |
| |
| /* Peer to the child is the raw buffer data */ |
| |
| RootOp = TrAllocateNode (PARSEOP_RAW_DATA); |
| RootOp->Asl.AmlOpcode = AML_RAW_DATA_BUFFER; |
| RootOp->Asl.AmlLength = ObjDesc->Buffer.Length; |
| RootOp->Asl.Value.String = (char *) ObjDesc->Buffer.Pointer; |
| RootOp->Asl.Parent = Op->Asl.Parent; |
| |
| Op->Asl.Next = RootOp; |
| Op = RootOp; |
| |
| DbgPrint (ASL_PARSE_OUTPUT, |
| "Constant expression reduced to (BUFFER) length %X\n", |
| ObjDesc->Buffer.Length); |
| break; |
| |
| |
| default: |
| printf ("Unsupported return type: %s\n", |
| AcpiUtGetObjectTypeName (ObjDesc)); |
| break; |
| } |
| } |
| |
| UtSetParseOpName (Op); |
| Op->Asl.Child = NULL; |
| |
| AcpiDsDeleteWalkState (WalkState); |
| |
| return (AE_CTRL_DEPTH); |
| } |
| |