NetBSD-5.0.2/sys/dist/acpica/psscope.c
/******************************************************************************
*
* Module Name: psscope - Parser scope stack management routines
* $Revision: 1.4 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, 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 "acpi.h"
#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;
}