505 lines
16 KiB
C
505 lines
16 KiB
C
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/******************************************************************************
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*
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* Module Name: asllength - Tree walk to determine package and opcode lengths
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* $Revision: 31 $
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#include "aslcompiler.h"
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#include "aslcompiler.y.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_COMPILER
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ACPI_MODULE_NAME ("asllength")
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/*******************************************************************************
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*
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* FUNCTION: LnInitLengthsWalk
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*
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* PARAMETERS: ASL_WALK_CALLBACK
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk callback to initialize (and re-initialize) the node
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* subtree length(s) to zero. The Subtree lengths are bubbled
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* up to the root node in order to get a total AML length.
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*
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******************************************************************************/
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ACPI_STATUS
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LnInitLengthsWalk (
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ACPI_PARSE_OBJECT *Op,
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UINT32 Level,
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void *Context)
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{
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Op->Asl.AmlSubtreeLength = 0;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: LnPackageLengthWalk
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*
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* PARAMETERS: ASL_WALK_CALLBACK
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk callback to calculate the total AML length.
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* 1) Calculate the AML lengths (opcode, package length, etc.) for
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* THIS node.
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* 2) Bubbble up all of these lengths to the parent node by summing
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* them all into the parent subtree length.
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*
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* Note: The SubtreeLength represents the total AML length of all child nodes
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* in all subtrees under a given node. Therefore, once this walk is
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* complete, the Root Node subtree length is the AML length of the entire
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* tree (and thus, the entire ACPI table)
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*
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******************************************************************************/
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ACPI_STATUS
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LnPackageLengthWalk (
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ACPI_PARSE_OBJECT *Op,
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UINT32 Level,
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void *Context)
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{
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/* Generate the AML lengths for this node */
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CgGenerateAmlLengths (Op);
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/* Bubble up all lengths (this node and all below it) to the parent */
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if ((Op->Asl.Parent) &&
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(Op->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
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{
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Op->Asl.Parent->Asl.AmlSubtreeLength += (Op->Asl.AmlLength +
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Op->Asl.AmlOpcodeLength +
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Op->Asl.AmlPkgLenBytes +
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Op->Asl.AmlSubtreeLength);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: LnAdjustLengthToRoot
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*
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* PARAMETERS: Op - Node whose Length was changed
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*
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* RETURN: None.
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*
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* DESCRIPTION: Change the Subtree length of the given node, and bubble the
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* change all the way up to the root node. This allows for
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* last second changes to a package length (for example, if the
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* package length encoding gets shorter or longer.)
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*
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******************************************************************************/
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void
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LnAdjustLengthToRoot (
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ACPI_PARSE_OBJECT *SubtreeOp,
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UINT32 LengthDelta)
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{
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ACPI_PARSE_OBJECT *Op;
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/* Adjust all subtree lengths up to the root */
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Op = SubtreeOp->Asl.Parent;
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while (Op)
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{
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Op->Asl.AmlSubtreeLength -= LengthDelta;
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Op = Op->Asl.Parent;
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}
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/* Adjust the global table length */
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Gbl_TableLength -= LengthDelta;
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}
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/*******************************************************************************
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*
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* FUNCTION: CgGetPackageLenByteCount
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*
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* PARAMETERS: Op - Parse node
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* PackageLength - Length to be encoded
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*
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* RETURN: Required length of the package length encoding
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*
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* DESCRIPTION: Calculate the number of bytes required to encode the given
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* package length.
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*
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******************************************************************************/
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UINT8
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CgGetPackageLenByteCount (
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ACPI_PARSE_OBJECT *Op,
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UINT32 PackageLength)
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{
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/*
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* Determine the number of bytes required to encode the package length
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* Note: the package length includes the number of bytes used to encode
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* the package length, so we must account for this also.
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*/
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if (PackageLength <= (0x0000003F - 1))
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{
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return (1);
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}
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else if (PackageLength <= (0x00000FFF - 2))
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{
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return (2);
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}
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else if (PackageLength <= (0x000FFFFF - 3))
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{
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return (3);
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}
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else if (PackageLength <= (0x0FFFFFFF - 4))
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{
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return (4);
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}
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else
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{
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/* Fatal error - the package length is too large to encode */
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AslError (ASL_ERROR, ASL_MSG_ENCODING_LENGTH, Op, NULL);
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}
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return (0);
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}
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/*******************************************************************************
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*
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* FUNCTION: CgGenerateAmlOpcodeLength
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*
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* PARAMETERS: Op - Parse node whose AML opcode lengths will be
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* calculated
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*
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* RETURN: None.
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*
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* DESCRIPTION: Calculate the AmlOpcodeLength, AmlPkgLenBytes, and AmlLength
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* fields for this node.
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*
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******************************************************************************/
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void
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CgGenerateAmlOpcodeLength (
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ACPI_PARSE_OBJECT *Op)
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{
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/* Check for two-byte opcode */
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if (Op->Asl.AmlOpcode > 0x00FF)
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{
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Op->Asl.AmlOpcodeLength = 2;
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}
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else
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{
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Op->Asl.AmlOpcodeLength = 1;
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}
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/* Does this opcode have an associated "PackageLength" field? */
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Op->Asl.AmlPkgLenBytes = 0;
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if (Op->Asl.CompileFlags & NODE_AML_PACKAGE)
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{
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Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op, Op->Asl.AmlSubtreeLength);
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}
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/* Data opcode lengths are easy */
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switch (Op->Asl.AmlOpcode)
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{
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case AML_BYTE_OP:
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Op->Asl.AmlLength = 1;
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break;
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case AML_WORD_OP:
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Op->Asl.AmlLength = 2;
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break;
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case AML_DWORD_OP:
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Op->Asl.AmlLength = 4;
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break;
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case AML_QWORD_OP:
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Op->Asl.AmlLength = 8;
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break;
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default:
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/* All data opcodes must be above */
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break;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: CgGenerateAmlLengths
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*
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* PARAMETERS: Op - Parse node
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*
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* RETURN: None.
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*
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* DESCRIPTION: Generate internal length fields based on the AML opcode or
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* parse opcode.
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*
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******************************************************************************/
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void
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CgGenerateAmlLengths (
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ACPI_PARSE_OBJECT *Op)
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{
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char *Buffer;
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ACPI_STATUS Status;
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switch (Op->Asl.AmlOpcode)
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{
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case AML_RAW_DATA_BYTE:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlLength = 1;
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return;
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case AML_RAW_DATA_WORD:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlLength = 2;
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return;
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case AML_RAW_DATA_DWORD:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlLength = 4;
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return;
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case AML_RAW_DATA_QWORD:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlLength = 8;
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return;
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case AML_RAW_DATA_BUFFER:
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/* Aml length is/was set by creator */
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Op->Asl.AmlOpcodeLength = 0;
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return;
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case AML_RAW_DATA_CHAIN:
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/* Aml length is/was set by creator */
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Op->Asl.AmlOpcodeLength = 0;
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return;
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default:
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break;
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}
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switch (Op->Asl.ParseOpcode)
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{
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case PARSEOP_DEFINITIONBLOCK:
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Gbl_TableLength = sizeof (ACPI_TABLE_HEADER) + Op->Asl.AmlSubtreeLength;
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break;
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case PARSEOP_NAMESEG:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlLength = 4;
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Op->Asl.ExternalName = Op->Asl.Value.String;
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break;
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case PARSEOP_NAMESTRING:
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case PARSEOP_METHODCALL:
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if (Op->Asl.CompileFlags & NODE_NAME_INTERNALIZED)
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{
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break;
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}
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Op->Asl.AmlOpcodeLength = 0;
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Status = UtInternalizeName (Op->Asl.Value.String, &Buffer);
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if (ACPI_FAILURE (Status))
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{
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DbgPrint (ASL_DEBUG_OUTPUT,
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"Failure from internalize name %X\n", Status);
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break;
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}
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Op->Asl.ExternalName = Op->Asl.Value.String;
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Op->Asl.Value.String = Buffer;
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Op->Asl.CompileFlags |= NODE_NAME_INTERNALIZED;
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Op->Asl.AmlLength = strlen (Buffer);
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/*
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* Check for single backslash reference to root,
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* make it a null terminated string in the AML
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*/
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if (Op->Asl.AmlLength == 1)
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{
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Op->Asl.AmlLength = 2;
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}
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break;
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case PARSEOP_STRING_LITERAL:
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Op->Asl.AmlOpcodeLength = 1;
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Op->Asl.AmlLength = strlen (Op->Asl.Value.String) + 1; /* Get null terminator */
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break;
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case PARSEOP_PACKAGE_LENGTH:
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Op->Asl.AmlOpcodeLength = 0;
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Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op, (UINT32) Op->Asl.Value.Integer);
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break;
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case PARSEOP_RAW_DATA:
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Op->Asl.AmlOpcodeLength = 0;
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break;
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case PARSEOP_DEFAULT_ARG:
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case PARSEOP_EXTERNAL:
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case PARSEOP_INCLUDE:
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case PARSEOP_INCLUDE_END:
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/* Ignore the "default arg" nodes, they are extraneous at this point */
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break;
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default:
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CgGenerateAmlOpcodeLength (Op);
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break;
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}
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}
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