diff options
Diffstat (limited to 'sys/contrib/dev/acpica/compiler/aslfold.c')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/aslfold.c | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/aslfold.c b/sys/contrib/dev/acpica/compiler/aslfold.c new file mode 100644 index 0000000..d744021 --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/aslfold.c @@ -0,0 +1,564 @@ + +/****************************************************************************** + * + * Module Name: aslfold - Constant folding + * $Revision: 1.20 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, 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 <contrib/dev/acpica/compiler/aslcompiler.h> +#include "aslcompiler.y.h" +#include <contrib/dev/acpica/amlcode.h> + +#include <contrib/dev/acpica/acdispat.h> +#include <contrib/dev/acpica/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 (ACPI_GET_OBJECT_TYPE (ObjDesc)) + { + 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); +} + |
