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Diffstat (limited to 'sys/contrib/dev/acpica/compiler/asllength.c')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/asllength.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/asllength.c b/sys/contrib/dev/acpica/compiler/asllength.c new file mode 100644 index 0000000..056aaeb --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/asllength.c @@ -0,0 +1,531 @@ + +/****************************************************************************** + * + * Module Name: asllength - Tree walk to determine package and opcode lengths + * $Revision: 1.37 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, 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 <contrib/dev/acpica/compiler/aslcompiler.h> +#include "aslcompiler.y.h" +#include <contrib/dev/acpica/amlcode.h> + + +#define _COMPONENT ACPI_COMPILER + ACPI_MODULE_NAME ("asllength") + +/* Local prototypes */ + +static UINT8 +CgGetPackageLenByteCount ( + ACPI_PARSE_OBJECT *Op, + UINT32 PackageLength); + +static void +CgGenerateAmlOpcodeLength ( + ACPI_PARSE_OBJECT *Op); + + +#ifdef ACPI_OBSOLETE_FUNCTIONS +void +LnAdjustLengthToRoot ( + ACPI_PARSE_OBJECT *Op, + UINT32 LengthDelta); +#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. + * + ******************************************************************************/ + +ACPI_STATUS +LnInitLengthsWalk ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context) +{ + + Op->Asl.AmlSubtreeLength = 0; + 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) + * + ******************************************************************************/ + +ACPI_STATUS +LnPackageLengthWalk ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context) +{ + + /* Generate the AML lengths for this node */ + + CgGenerateAmlLengths (Op); + + /* Bubble up all lengths (this node and all below it) to the parent */ + + if ((Op->Asl.Parent) && + (Op->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)) + { + Op->Asl.Parent->Asl.AmlSubtreeLength += (Op->Asl.AmlLength + + Op->Asl.AmlOpcodeLength + + Op->Asl.AmlPkgLenBytes + + Op->Asl.AmlSubtreeLength); + } + 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 +CgGetPackageLenByteCount ( + ACPI_PARSE_OBJECT *Op, + UINT32 PackageLength) +{ + + /* + * 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. + */ + if (PackageLength <= (0x0000003F - 1)) + { + return (1); + } + else if (PackageLength <= (0x00000FFF - 2)) + { + return (2); + } + else if (PackageLength <= (0x000FFFFF - 3)) + { + return (3); + } + else if (PackageLength <= (0x0FFFFFFF - 4)) + { + return (4); + } + else + { + /* Fatal error - the package length is too large to encode */ + + AslError (ASL_ERROR, ASL_MSG_ENCODING_LENGTH, Op, NULL); + } + + 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 +CgGenerateAmlOpcodeLength ( + ACPI_PARSE_OBJECT *Op) +{ + + /* Check for two-byte opcode */ + + if (Op->Asl.AmlOpcode > 0x00FF) + { + Op->Asl.AmlOpcodeLength = 2; + } + else + { + Op->Asl.AmlOpcodeLength = 1; + } + + /* Does this opcode have an associated "PackageLength" field? */ + + Op->Asl.AmlPkgLenBytes = 0; + if (Op->Asl.CompileFlags & NODE_AML_PACKAGE) + { + Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount ( + Op, Op->Asl.AmlSubtreeLength); + } + + /* Data opcode lengths are easy */ + + switch (Op->Asl.AmlOpcode) + { + case AML_BYTE_OP: + + Op->Asl.AmlLength = 1; + break; + + case AML_WORD_OP: + + Op->Asl.AmlLength = 2; + break; + + case AML_DWORD_OP: + + Op->Asl.AmlLength = 4; + break; + + case AML_QWORD_OP: + + Op->Asl.AmlLength = 8; + 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 +CgGenerateAmlLengths ( + ACPI_PARSE_OBJECT *Op) +{ + char *Buffer; + ACPI_STATUS Status; + + + switch (Op->Asl.AmlOpcode) + { + case AML_RAW_DATA_BYTE: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlLength = 1; + return; + + case AML_RAW_DATA_WORD: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlLength = 2; + return; + + case AML_RAW_DATA_DWORD: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlLength = 4; + return; + + case AML_RAW_DATA_QWORD: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlLength = 8; + return; + + case AML_RAW_DATA_BUFFER: + + /* Aml length is/was set by creator */ + + Op->Asl.AmlOpcodeLength = 0; + return; + + case AML_RAW_DATA_CHAIN: + + /* Aml length is/was set by creator */ + + Op->Asl.AmlOpcodeLength = 0; + return; + + default: + break; + } + + switch (Op->Asl.ParseOpcode) + { + case PARSEOP_DEFINITIONBLOCK: + + Gbl_TableLength = sizeof (ACPI_TABLE_HEADER) + + Op->Asl.AmlSubtreeLength; + break; + + case PARSEOP_NAMESEG: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlLength = 4; + Op->Asl.ExternalName = Op->Asl.Value.String; + break; + + case PARSEOP_NAMESTRING: + case PARSEOP_METHODCALL: + + if (Op->Asl.CompileFlags & NODE_NAME_INTERNALIZED) + { + break; + } + + Op->Asl.AmlOpcodeLength = 0; + Status = UtInternalizeName (Op->Asl.Value.String, &Buffer); + if (ACPI_FAILURE (Status)) + { + DbgPrint (ASL_DEBUG_OUTPUT, + "Failure from internalize name %X\n", Status); + break; + } + + Op->Asl.ExternalName = Op->Asl.Value.String; + Op->Asl.Value.String = Buffer; + Op->Asl.CompileFlags |= NODE_NAME_INTERNALIZED; + + Op->Asl.AmlLength = strlen (Buffer); + + /* + * Check for single backslash reference to root, + * make it a null terminated string in the AML + */ + if (Op->Asl.AmlLength == 1) + { + Op->Asl.AmlLength = 2; + } + break; + + case PARSEOP_STRING_LITERAL: + + Op->Asl.AmlOpcodeLength = 1; + + /* Get null terminator */ + + Op->Asl.AmlLength = strlen (Op->Asl.Value.String) + 1; + break; + + case PARSEOP_PACKAGE_LENGTH: + + Op->Asl.AmlOpcodeLength = 0; + Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op, + (UINT32) Op->Asl.Value.Integer); + break; + + case PARSEOP_RAW_DATA: + + Op->Asl.AmlOpcodeLength = 0; + 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: + + CgGenerateAmlOpcodeLength (Op); + 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 +LnAdjustLengthToRoot ( + ACPI_PARSE_OBJECT *SubtreeOp, + UINT32 LengthDelta) +{ + ACPI_PARSE_OBJECT *Op; + + + /* Adjust all subtree lengths up to the root */ + + Op = SubtreeOp->Asl.Parent; + while (Op) + { + Op->Asl.AmlSubtreeLength -= LengthDelta; + Op = Op->Asl.Parent; + } + + /* Adjust the global table length */ + + Gbl_TableLength -= LengthDelta; +} +#endif + + |
