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/******************************************************************************
*
* Module Name: psscope - Parser scope stack management routines
*
*****************************************************************************/
/*
* 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/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acparser.h>
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME ("psscope")
/*******************************************************************************
*
* FUNCTION: AcpiPsGetParentScope
*
* PARAMETERS: ParserState - Current parser state object
*
* RETURN: Pointer to an Op object
*
* DESCRIPTION: Get parent of current op being parsed
*
******************************************************************************/
ACPI_PARSE_OBJECT *
AcpiPsGetParentScope (
ACPI_PARSE_STATE *ParserState)
{
return (ParserState->Scope->ParseScope.Op);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsHasCompletedScope
*
* PARAMETERS: ParserState - Current parser state object
*
* RETURN: Boolean, TRUE = scope completed.
*
* DESCRIPTION: Is parsing of current argument complete? Determined by
* 1) AML pointer is at or beyond the end of the scope
* 2) The scope argument count has reached zero.
*
******************************************************************************/
BOOLEAN
AcpiPsHasCompletedScope (
ACPI_PARSE_STATE *ParserState)
{
return ((BOOLEAN)
((ParserState->Aml >= ParserState->Scope->ParseScope.ArgEnd ||
!ParserState->Scope->ParseScope.ArgCount)));
}
/*******************************************************************************
*
* FUNCTION: AcpiPsInitScope
*
* PARAMETERS: ParserState - Current parser state object
* Root - the Root Node of this new scope
*
* RETURN: Status
*
* DESCRIPTION: Allocate and init a new scope object
*
******************************************************************************/
ACPI_STATUS
AcpiPsInitScope (
ACPI_PARSE_STATE *ParserState,
ACPI_PARSE_OBJECT *RootOp)
{
ACPI_GENERIC_STATE *Scope;
ACPI_FUNCTION_TRACE_PTR (PsInitScope, RootOp);
Scope = AcpiUtCreateGenericState ();
if (!Scope)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RPSCOPE;
Scope->ParseScope.Op = RootOp;
Scope->ParseScope.ArgCount = ACPI_VAR_ARGS;
Scope->ParseScope.ArgEnd = ParserState->AmlEnd;
Scope->ParseScope.PkgEnd = ParserState->AmlEnd;
ParserState->Scope = Scope;
ParserState->StartOp = RootOp;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsPushScope
*
* PARAMETERS: ParserState - Current parser state object
* Op - Current op to be pushed
* RemainingArgs - List of args remaining
* ArgCount - Fixed or variable number of args
*
* RETURN: Status
*
* DESCRIPTION: Push current op to begin parsing its argument
*
******************************************************************************/
ACPI_STATUS
AcpiPsPushScope (
ACPI_PARSE_STATE *ParserState,
ACPI_PARSE_OBJECT *Op,
UINT32 RemainingArgs,
UINT32 ArgCount)
{
ACPI_GENERIC_STATE *Scope;
ACPI_FUNCTION_TRACE_PTR (PsPushScope, Op);
Scope = AcpiUtCreateGenericState ();
if (!Scope)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PSCOPE;
Scope->ParseScope.Op = Op;
Scope->ParseScope.ArgList = RemainingArgs;
Scope->ParseScope.ArgCount = ArgCount;
Scope->ParseScope.PkgEnd = ParserState->PkgEnd;
/* Push onto scope stack */
AcpiUtPushGenericState (&ParserState->Scope, Scope);
if (ArgCount == ACPI_VAR_ARGS)
{
/* Multiple arguments */
Scope->ParseScope.ArgEnd = ParserState->PkgEnd;
}
else
{
/* Single argument */
Scope->ParseScope.ArgEnd = ACPI_TO_POINTER (ACPI_MAX_PTR);
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsPopScope
*
* PARAMETERS: ParserState - Current parser state object
* Op - Where the popped op is returned
* ArgList - Where the popped "next argument" is
* returned
* ArgCount - Count of objects in ArgList
*
* RETURN: Status
*
* DESCRIPTION: Return to parsing a previous op
*
******************************************************************************/
void
AcpiPsPopScope (
ACPI_PARSE_STATE *ParserState,
ACPI_PARSE_OBJECT **Op,
UINT32 *ArgList,
UINT32 *ArgCount)
{
ACPI_GENERIC_STATE *Scope = ParserState->Scope;
ACPI_FUNCTION_TRACE (PsPopScope);
/* Only pop the scope if there is in fact a next scope */
if (Scope->Common.Next)
{
Scope = AcpiUtPopGenericState (&ParserState->Scope);
/* Return to parsing previous op */
*Op = Scope->ParseScope.Op;
*ArgList = Scope->ParseScope.ArgList;
*ArgCount = Scope->ParseScope.ArgCount;
ParserState->PkgEnd = Scope->ParseScope.PkgEnd;
/* All done with this scope state structure */
AcpiUtDeleteGenericState (Scope);
}
else
{
/* Empty parse stack, prepare to fetch next opcode */
*Op = NULL;
*ArgList = 0;
*ArgCount = 0;
}
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
"Popped Op %p Args %X\n", *Op, *ArgCount));
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiPsCleanupScope
*
* PARAMETERS: ParserState - Current parser state object
*
* RETURN: None
*
* DESCRIPTION: Destroy available list, remaining stack levels, and return
* root scope
*
******************************************************************************/
void
AcpiPsCleanupScope (
ACPI_PARSE_STATE *ParserState)
{
ACPI_GENERIC_STATE *Scope;
ACPI_FUNCTION_TRACE_PTR (PsCleanupScope, ParserState);
if (!ParserState)
{
return_VOID;
}
/* Delete anything on the scope stack */
while (ParserState->Scope)
{
Scope = AcpiUtPopGenericState (&ParserState->Scope);
AcpiUtDeleteGenericState (Scope);
}
return_VOID;
}