380 lines
9.4 KiB
C
380 lines
9.4 KiB
C
/******************************************************************************
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*
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* Module Name: dtsubtable.c - handling of subtables within ACPI tables
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, 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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#define __DTSUBTABLE_C__
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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#define _COMPONENT DT_COMPILER
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ACPI_MODULE_NAME ("dtsubtable")
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/******************************************************************************
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*
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* FUNCTION: DtCreateSubtable
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*
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* PARAMETERS: Buffer - Input buffer
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* Length - Buffer length
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* RetSubtable - Returned newly created subtable
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*
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* RETURN: None
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*
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* DESCRIPTION: Create a subtable that is not listed with ACPI_DMTABLE_INFO
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* For example, FACS has 24 bytes reserved at the end
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* and it's not listed at AcpiDmTableInfoFacs
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*
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*****************************************************************************/
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void
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DtCreateSubtable (
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UINT8 *Buffer,
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UINT32 Length,
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DT_SUBTABLE **RetSubtable)
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{
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DT_SUBTABLE *Subtable;
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Subtable = UtLocalCalloc (sizeof (DT_SUBTABLE));
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/* Create a new buffer for the subtable data */
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Subtable->Buffer = UtLocalCalloc (Length);
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ACPI_MEMCPY (Subtable->Buffer, Buffer, Length);
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Subtable->Length = Length;
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Subtable->TotalLength = Length;
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*RetSubtable = Subtable;
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}
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/******************************************************************************
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*
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* FUNCTION: DtInsertSubtable
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*
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* PARAMETERS: ParentTable - The Parent of the new subtable
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* Subtable - The new subtable to insert
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*
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* RETURN: None
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*
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* DESCRIPTION: Insert the new subtable to the parent table
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*
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*****************************************************************************/
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void
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DtInsertSubtable (
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DT_SUBTABLE *ParentTable,
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DT_SUBTABLE *Subtable)
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{
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DT_SUBTABLE *ChildTable;
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Subtable->Peer = NULL;
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Subtable->Parent = ParentTable;
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Subtable->Depth = ParentTable->Depth + 1;
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/* Link the new entry into the child list */
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if (!ParentTable->Child)
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{
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ParentTable->Child = Subtable;
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}
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else
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{
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/* Walk to the end of the child list */
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ChildTable = ParentTable->Child;
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while (ChildTable->Peer)
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{
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ChildTable = ChildTable->Peer;
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}
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/* Add new subtable at the end of the child list */
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ChildTable->Peer = Subtable;
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}
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}
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/******************************************************************************
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*
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* FUNCTION: DtPushSubtable
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*
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* PARAMETERS: Subtable - Subtable to push
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*
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* RETURN: None
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*
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* DESCRIPTION: Push a subtable onto a subtable stack
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*
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*****************************************************************************/
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void
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DtPushSubtable (
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DT_SUBTABLE *Subtable)
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{
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Subtable->StackTop = Gbl_SubtableStack;
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Gbl_SubtableStack = Subtable;
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}
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/******************************************************************************
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*
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* FUNCTION: DtPopSubtable
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Pop a subtable from a subtable stack. Uses global SubtableStack
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*
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*****************************************************************************/
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void
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DtPopSubtable (
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void)
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{
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DT_SUBTABLE *Subtable;
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Subtable = Gbl_SubtableStack;
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if (Subtable)
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{
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Gbl_SubtableStack = Subtable->StackTop;
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}
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}
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/******************************************************************************
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*
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* FUNCTION: DtPeekSubtable
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*
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* PARAMETERS: None
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*
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* RETURN: The subtable on top of stack
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*
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* DESCRIPTION: Get the subtable on top of stack
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*
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*****************************************************************************/
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DT_SUBTABLE *
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DtPeekSubtable (
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void)
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{
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return (Gbl_SubtableStack);
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}
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/******************************************************************************
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*
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* FUNCTION: DtGetNextSubtable
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*
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* PARAMETERS: ParentTable - Parent table whose children we are
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* getting
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* ChildTable - Previous child that was found.
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* The NEXT child will be returned
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*
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* RETURN: Pointer to the NEXT child or NULL if none is found.
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*
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* DESCRIPTION: Return the next peer subtable within the tree.
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*
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*****************************************************************************/
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DT_SUBTABLE *
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DtGetNextSubtable (
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DT_SUBTABLE *ParentTable,
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DT_SUBTABLE *ChildTable)
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{
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ACPI_FUNCTION_ENTRY ();
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if (!ChildTable)
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{
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/* It's really the parent's _scope_ that we want */
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return (ParentTable->Child);
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}
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/* Otherwise just return the next peer (NULL if at end-of-list) */
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return (ChildTable->Peer);
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}
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/******************************************************************************
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*
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* FUNCTION: DtGetParentSubtable
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*
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* PARAMETERS: Subtable - Current subtable
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*
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* RETURN: Parent of the given subtable
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*
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* DESCRIPTION: Get the parent of the given subtable in the tree
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*
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*****************************************************************************/
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DT_SUBTABLE *
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DtGetParentSubtable (
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DT_SUBTABLE *Subtable)
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{
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if (!Subtable)
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{
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return (NULL);
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}
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return (Subtable->Parent);
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}
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/******************************************************************************
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*
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* FUNCTION: DtGetSubtableLength
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*
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* PARAMETERS: Field - Current field list pointer
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* Info - Data table info
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*
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* RETURN: Subtable length
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*
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* DESCRIPTION: Get length of bytes needed to compile the subtable
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*
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*****************************************************************************/
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UINT32
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DtGetSubtableLength (
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DT_FIELD *Field,
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ACPI_DMTABLE_INFO *Info)
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{
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UINT32 ByteLength = 0;
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UINT8 Step;
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UINT8 i;
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/* Walk entire Info table; Null name terminates */
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for (; Info->Name; Info++)
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{
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if (Info->Opcode == ACPI_DMT_EXTRA_TEXT)
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{
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continue;
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}
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if (!Field)
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{
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goto Error;
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}
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ByteLength += DtGetFieldLength (Field, Info);
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switch (Info->Opcode)
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{
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case ACPI_DMT_GAS:
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Step = 5;
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break;
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case ACPI_DMT_HESTNTFY:
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Step = 9;
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break;
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default:
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Step = 1;
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break;
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}
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for (i = 0; i < Step; i++)
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{
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if (!Field)
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{
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goto Error;
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}
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Field = Field->Next;
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}
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}
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return (ByteLength);
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Error:
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if (!Field)
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{
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sprintf (MsgBuffer, "Found NULL field - Field name \"%s\" needed",
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Info->Name);
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DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, MsgBuffer);
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}
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return (ASL_EOF);
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}
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/******************************************************************************
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*
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* FUNCTION: DtSetSubtableLength
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*
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* PARAMETERS: Subtable - Subtable
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*
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* RETURN: None
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*
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* DESCRIPTION: Set length of the subtable into its length field
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*
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*****************************************************************************/
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void
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DtSetSubtableLength (
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DT_SUBTABLE *Subtable)
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{
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if (!Subtable->LengthField)
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{
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return;
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}
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ACPI_MEMCPY (Subtable->LengthField, &Subtable->TotalLength,
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Subtable->SizeOfLengthField);
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}
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