asllength.c revision 199767f8919635c4928607450d9e0abb932109ce
/******************************************************************************
*
* Module Name: asllength - Tree walk to determine package and opcode lengths
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, 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 "aslcompiler.y.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("asllength")
/* Local prototypes */
static UINT8
static void
#ifdef ACPI_OBSOLETE_FUNCTIONS
void
#endif
/*******************************************************************************
*
* FUNCTION: LnInitLengthsWalk
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Walk callback to initialize (and re-initialize) the node
* subtree length(s) to zero. The Subtree lengths are bubbled
* up to the root node in order to get a total AML length.
*
******************************************************************************/
void *Context)
{
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: LnPackageLengthWalk
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Walk callback to calculate the total AML length.
* 1) Calculate the AML lengths (opcode, package length, etc.) for
* THIS node.
* 2) Bubbble up all of these lengths to the parent node by summing
* them all into the parent subtree length.
*
* Note: The SubtreeLength represents the total AML length of all child nodes
* in all subtrees under a given node. Therefore, once this walk is
* complete, the Root Node subtree length is the AML length of the entire
* tree (and thus, the entire ACPI table)
*
******************************************************************************/
void *Context)
{
/* Generate the AML lengths for this node */
/* Bubble up all lengths (this node and all below it) to the parent */
{
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: CgGetPackageLenByteCount
*
* PARAMETERS: Op - Parse node
* PackageLength - Length to be encoded
*
* RETURN: Required length of the package length encoding
*
* DESCRIPTION: Calculate the number of bytes required to encode the given
* package length.
*
******************************************************************************/
static UINT8
{
/*
* Determine the number of bytes required to encode the package length
* Note: the package length includes the number of bytes used to encode
* the package length, so we must account for this also.
*/
{
return (1);
}
{
return (2);
}
{
return (3);
}
{
return (4);
}
else
{
/* Fatal error - the package length is too large to encode */
}
return (0);
}
/*******************************************************************************
*
* FUNCTION: CgGenerateAmlOpcodeLength
*
* PARAMETERS: Op - Parse node whose AML opcode lengths will be
* calculated
*
* RETURN: None.
*
* DESCRIPTION: Calculate the AmlOpcodeLength, AmlPkgLenBytes, and AmlLength
* fields for this node.
*
******************************************************************************/
static void
{
/* Check for two-byte opcode */
{
}
else
{
}
/* Does this opcode have an associated "PackageLength" field? */
{
}
/* Data opcode lengths are easy */
{
case AML_BYTE_OP:
break;
case AML_WORD_OP:
break;
case AML_DWORD_OP:
break;
case AML_QWORD_OP:
break;
default:
/* All data opcodes must be above */
break;
}
}
/*******************************************************************************
*
* FUNCTION: CgGenerateAmlLengths
*
* PARAMETERS: Op - Parse node
*
* RETURN: None.
*
* DESCRIPTION: Generate internal length fields based on the AML opcode or
* parse opcode.
*
******************************************************************************/
void
{
char *Buffer;
{
case AML_RAW_DATA_BYTE:
return;
case AML_RAW_DATA_WORD:
return;
case AML_RAW_DATA_DWORD:
return;
case AML_RAW_DATA_QWORD:
return;
case AML_RAW_DATA_BUFFER:
return;
case AML_RAW_DATA_CHAIN:
return;
default:
break;
}
{
case PARSEOP_DEFINITIONBLOCK:
Gbl_TableLength = sizeof (ACPI_TABLE_HEADER) +
break;
case PARSEOP_NAMESEG:
break;
case PARSEOP_NAMESTRING:
case PARSEOP_METHODCALL:
{
break;
}
if (ACPI_FAILURE (Status))
{
"Failure from internalize name %X\n", Status);
break;
}
/*
* Check for single backslash reference to root,
* make it a null terminated string in the AML
*/
{
}
break;
case PARSEOP_STRING_LITERAL:
/* Get null terminator */
break;
case PARSEOP_PACKAGE_LENGTH:
break;
case PARSEOP_RAW_DATA:
break;
case PARSEOP_DEFAULT_ARG:
case PARSEOP_EXTERNAL:
case PARSEOP_INCLUDE:
case PARSEOP_INCLUDE_END:
/* Ignore the "default arg" nodes, they are extraneous at this point */
break;
default:
break;
}
}
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: LnAdjustLengthToRoot
*
* PARAMETERS: Op - Node whose Length was changed
*
* RETURN: None.
*
* DESCRIPTION: Change the Subtree length of the given node, and bubble the
* change all the way up to the root node. This allows for
* last second changes to a package length (for example, if the
* package length encoding gets shorter or longer.)
*
******************************************************************************/
void
{
/* Adjust all subtree lengths up to the root */
while (Op)
{
}
/* Adjust the global table length */
}
#endif