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301 lines
8.5 KiB
C
301 lines
8.5 KiB
C
/******************************************************************************
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*
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* Module Name: psscope - Parser scope stack management routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psscope")
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsGetParentScope
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*
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* PARAMETERS: ParserState - Current parser state object
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*
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* RETURN: Pointer to an Op object
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*
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* DESCRIPTION: Get parent of current op being parsed
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*
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******************************************************************************/
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ACPI_PARSE_OBJECT *
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AcpiPsGetParentScope (
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ACPI_PARSE_STATE *ParserState)
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{
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return (ParserState->Scope->ParseScope.Op);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsHasCompletedScope
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*
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* PARAMETERS: ParserState - Current parser state object
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*
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* RETURN: Boolean, TRUE = scope completed.
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*
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* DESCRIPTION: Is parsing of current argument complete? Determined by
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* 1) AML pointer is at or beyond the end of the scope
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* 2) The scope argument count has reached zero.
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*
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******************************************************************************/
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BOOLEAN
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AcpiPsHasCompletedScope (
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ACPI_PARSE_STATE *ParserState)
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{
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return ((BOOLEAN)
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((ParserState->Aml >= ParserState->Scope->ParseScope.ArgEnd ||
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!ParserState->Scope->ParseScope.ArgCount)));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsInitScope
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*
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* PARAMETERS: ParserState - Current parser state object
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* Root - the Root Node of this new scope
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocate and init a new scope object
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsInitScope (
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ACPI_PARSE_STATE *ParserState,
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ACPI_PARSE_OBJECT *RootOp)
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{
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ACPI_GENERIC_STATE *Scope;
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ACPI_FUNCTION_TRACE_PTR (PsInitScope, RootOp);
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Scope = AcpiUtCreateGenericState ();
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if (!Scope)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_RPSCOPE;
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Scope->ParseScope.Op = RootOp;
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Scope->ParseScope.ArgCount = ACPI_VAR_ARGS;
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Scope->ParseScope.ArgEnd = ParserState->AmlEnd;
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Scope->ParseScope.PkgEnd = ParserState->AmlEnd;
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ParserState->Scope = Scope;
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ParserState->StartOp = RootOp;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsPushScope
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*
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* PARAMETERS: ParserState - Current parser state object
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* Op - Current op to be pushed
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* RemainingArgs - List of args remaining
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* ArgCount - Fixed or variable number of args
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push current op to begin parsing its argument
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiPsPushScope (
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ACPI_PARSE_STATE *ParserState,
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ACPI_PARSE_OBJECT *Op,
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UINT32 RemainingArgs,
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UINT32 ArgCount)
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{
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ACPI_GENERIC_STATE *Scope;
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ACPI_FUNCTION_TRACE_PTR (PsPushScope, Op);
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Scope = AcpiUtCreateGenericState ();
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if (!Scope)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Scope->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PSCOPE;
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Scope->ParseScope.Op = Op;
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Scope->ParseScope.ArgList = RemainingArgs;
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Scope->ParseScope.ArgCount = ArgCount;
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Scope->ParseScope.PkgEnd = ParserState->PkgEnd;
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/* Push onto scope stack */
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AcpiUtPushGenericState (&ParserState->Scope, Scope);
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if (ArgCount == ACPI_VAR_ARGS)
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{
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/* Multiple arguments */
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Scope->ParseScope.ArgEnd = ParserState->PkgEnd;
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}
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else
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{
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/* Single argument */
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Scope->ParseScope.ArgEnd = ACPI_TO_POINTER (ACPI_MAX_PTR);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsPopScope
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*
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* PARAMETERS: ParserState - Current parser state object
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* Op - Where the popped op is returned
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* ArgList - Where the popped "next argument" is
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* returned
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* ArgCount - Count of objects in ArgList
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return to parsing a previous op
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*
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******************************************************************************/
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void
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AcpiPsPopScope (
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ACPI_PARSE_STATE *ParserState,
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ACPI_PARSE_OBJECT **Op,
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UINT32 *ArgList,
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UINT32 *ArgCount)
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{
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ACPI_GENERIC_STATE *Scope = ParserState->Scope;
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ACPI_FUNCTION_TRACE (PsPopScope);
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/* Only pop the scope if there is in fact a next scope */
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if (Scope->Common.Next)
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{
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Scope = AcpiUtPopGenericState (&ParserState->Scope);
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/* Return to parsing previous op */
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*Op = Scope->ParseScope.Op;
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*ArgList = Scope->ParseScope.ArgList;
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*ArgCount = Scope->ParseScope.ArgCount;
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ParserState->PkgEnd = Scope->ParseScope.PkgEnd;
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/* All done with this scope state structure */
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AcpiUtDeleteGenericState (Scope);
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}
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else
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{
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/* Empty parse stack, prepare to fetch next opcode */
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*Op = NULL;
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*ArgList = 0;
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*ArgCount = 0;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
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"Popped Op %p Args %X\n", *Op, *ArgCount));
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsCleanupScope
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*
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* PARAMETERS: ParserState - Current parser state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Destroy available list, remaining stack levels, and return
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* root scope
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*
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******************************************************************************/
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void
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AcpiPsCleanupScope (
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ACPI_PARSE_STATE *ParserState)
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{
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ACPI_GENERIC_STATE *Scope;
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ACPI_FUNCTION_TRACE_PTR (PsCleanupScope, ParserState);
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if (!ParserState)
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{
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return_VOID;
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}
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/* Delete anything on the scope stack */
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while (ParserState->Scope)
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{
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Scope = AcpiUtPopGenericState (&ParserState->Scope);
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AcpiUtDeleteGenericState (Scope);
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}
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return_VOID;
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}
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