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| Current File : //usr/src/sys/contrib/dev/acpica/compiler/asltransform.c |
/******************************************************************************
*
* Module Name: asltransform - Parse tree transforms
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, 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 <contrib/dev/acpica/compiler/aslcompiler.h>
#include "aslcompiler.y.h"
#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);
/*******************************************************************************
*
* 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: TrAmlTransformWalk
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: None
*
* DESCRIPTION: Parse tree walk to generate both the AML opcodes and the AML
* operands.
*
******************************************************************************/
ACPI_STATUS
TrAmlTransformWalk (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
TrTransformSubtree (Op);
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)
{
if (Op->Asl.AmlOpcode == AML_RAW_DATA_BYTE)
{
return;
}
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_DEFINITIONBLOCK:
TrDoDefinitionBlock (Op);
break;
case PARSEOP_SWITCH:
TrDoSwitch (Op);
break;
case PARSEOP_METHOD:
/*
* TBD: Zero the tempname (_T_x) count. Probably shouldn't be a global,
* however
*/
Gbl_TempCount = 0;
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;
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_NAME (Next->Asl.Value.String, ACPI_SIG_DSDT))
{
Gbl_ReferenceOptimizationFlag = FALSE;
}
}
}
Gbl_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;
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, &Gbl_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)
{
if (CaseOp)
{
/* Add an ELSE to complete the previous CASE */
if (!Conditional)
{
return;
}
NewOp = TrCreateLeafNode (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(<size>){<data>},
* MEQ, _T_x, MTR, Zero, Zero), Ones))
*/
NewOp2 = TrCreateLeafNode (PARSEOP_MATCHTYPE_MEQ);
Predicate->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Conditional);
NewOp = NewOp2;
NewOp2 = TrCreateValuedLeafNode (PARSEOP_NAMESTRING,
(UINT64) ACPI_TO_INTEGER (PredicateValueName));
NewOp->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Predicate);
NewOp = NewOp2;
NewOp2 = TrCreateLeafNode (PARSEOP_MATCHTYPE_MTR);
NewOp->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Predicate);
NewOp = NewOp2;
NewOp2 = TrCreateLeafNode (PARSEOP_ZERO);
NewOp->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Predicate);
NewOp = NewOp2;
NewOp2 = TrCreateLeafNode (PARSEOP_ZERO);
NewOp->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Predicate);
NewOp2 = TrCreateLeafNode (PARSEOP_MATCH);
NewOp2->Asl.Child = Predicate; /* PARSEOP_PACKAGE */
TrAmlInitLineNumbers (NewOp2, Conditional);
TrAmlSetSubtreeParent (Predicate, NewOp2);
NewOp = NewOp2;
NewOp2 = TrCreateLeafNode (PARSEOP_ONES);
NewOp->Asl.Next = NewOp2;
TrAmlInitLineNumbers (NewOp2, Conditional);
NewOp2 = TrCreateLeafNode (PARSEOP_LEQUAL);
NewOp2->Asl.Child = NewOp;
NewOp->Asl.Parent = NewOp2;
TrAmlInitLineNumbers (NewOp2, Conditional);
TrAmlSetSubtreeParent (NewOp, NewOp2);
NewOp = NewOp2;
NewOp2 = TrCreateLeafNode (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 = TrCreateValuedLeafNode (PARSEOP_NAMESTRING,
(UINT64) ACPI_TO_INTEGER (PredicateValueName));
NewOp->Asl.Next = Predicate;
TrAmlInitLineNumbers (NewOp, Predicate);
NewOp2 = TrCreateLeafNode (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 */
if (!Conditional)
{
return;
}
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 = TrCreateLeafNode (PARSEOP_NAME);
/* Find the parent method */
Next = StartNode;
while ((Next->Asl.ParseOpcode != PARSEOP_METHOD) &&
(Next->Asl.ParseOpcode != PARSEOP_DEFINITIONBLOCK))
{
Next = Next->Asl.Parent;
}
MethodOp = Next;
NewOp->Asl.CompileFlags |= NODE_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 = TrCreateValuedLeafNode (PARSEOP_NAMESEG,
(UINT64) ACPI_TO_INTEGER (PredicateValueName));
NewOp2->Asl.CompileFlags |= NODE_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 = TrCreateValuedLeafNode (PARSEOP_ZERO,
(UINT64) 0);
break;
case ACPI_BTYPE_STRING:
NewOp2->Asl.Next = TrCreateValuedLeafNode (PARSEOP_STRING_LITERAL,
(UINT64) ACPI_TO_INTEGER (""));
break;
case ACPI_BTYPE_BUFFER:
(void) TrLinkPeerNode (NewOp2, TrCreateValuedLeafNode (PARSEOP_BUFFER,
(UINT64) 0));
Next = NewOp2->Asl.Next;
(void) TrLinkChildren (Next, 1, TrCreateValuedLeafNode (PARSEOP_ZERO,
(UINT64) 1));
(void) TrLinkPeerNode (Next->Asl.Child,
TrCreateValuedLeafNode (PARSEOP_DEFAULT_ARG, (UINT64) 0));
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 = TrCreateLeafNode (PARSEOP_ONE);
NewOp->Asl.Next = Predicate->Asl.Next;
NewOp->Asl.Parent = StartNode;
StartNode->Asl.Child = NewOp;
/* Create a Store() node */
StoreOp = TrCreateLeafNode (PARSEOP_STORE);
StoreOp->Asl.Parent = StartNode;
TrAmlInsertPeer (NewOp, StoreOp);
/* Complete the Store subtree */
StoreOp->Asl.Child = Predicate;
Predicate->Asl.Parent = StoreOp;
NewOp = TrCreateValuedLeafNode (PARSEOP_NAMESEG,
(UINT64) ACPI_TO_INTEGER (PredicateValueName));
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 = TrCreateLeafNode (PARSEOP_BREAK);
BreakOp->Asl.Parent = StartNode;
TrAmlInsertPeer (Conditional, BreakOp);
}