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Diffstat (limited to 'sys/contrib/dev/acpica/components/utilities/utcksum.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/utilities/utcksum.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/utilities/utcksum.c b/sys/contrib/dev/acpica/components/utilities/utcksum.c new file mode 100644 index 000000000000..50f8f80570ef --- /dev/null +++ b/sys/contrib/dev/acpica/components/utilities/utcksum.c @@ -0,0 +1,335 @@ +/****************************************************************************** + * + * Module Name: utcksum - Support generating table checksums + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2025, 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. + * + ***************************************************************************** + * + * Alternatively, you may choose to be licensed under the terms of the + * following license: + * + * 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. + * + * 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 MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * 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 DAMAGE. + * + * Alternatively, you may choose to be licensed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + *****************************************************************************/ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acdisasm.h> +#include <contrib/dev/acpica/include/acutils.h> + + +/* This module used for application-level code only */ + +#define _COMPONENT ACPI_CA_DISASSEMBLER + ACPI_MODULE_NAME ("utcksum") + + +/******************************************************************************* + * + * FUNCTION: AcpiUtVerifyChecksum + * + * PARAMETERS: Table - ACPI table to verify + * Length - Length of entire table + * + * RETURN: Status + * + * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns + * exception on bad checksum. + * Note: We don't have to check for a CDAT here, since CDAT is + * not in the RSDT/XSDT, and the CDAT table is never installed + * via ACPICA. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtVerifyChecksum ( + ACPI_TABLE_HEADER *Table, + UINT32 Length) +{ + UINT8 Checksum; + + + /* + * FACS/S3PT: + * They are the odd tables, have no standard ACPI header and no checksum + */ + if (ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_S3PT) || + ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_FACS)) + { + return (AE_OK); + } + + /* Compute the checksum on the table */ + + Length = Table->Length; + Checksum = AcpiUtGenerateChecksum (ACPI_CAST_PTR (UINT8, Table), Length, Table->Checksum); + + /* Computed checksum matches table? */ + + if (Checksum != Table->Checksum) + { + ACPI_BIOS_WARNING ((AE_INFO, + "Incorrect checksum in table [%4.4s] - 0x%2.2X, " + "should be 0x%2.2X", + Table->Signature, Table->Checksum, + Table->Checksum - Checksum)); + +#if (ACPI_CHECKSUM_ABORT) + return (AE_BAD_CHECKSUM); +#endif + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtVerifyCdatChecksum + * + * PARAMETERS: Table - CDAT ACPI table to verify + * Length - Length of entire table + * + * RETURN: Status + * + * DESCRIPTION: Verifies that the CDAT table checksums to zero. Optionally + * returns an exception on bad checksum. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtVerifyCdatChecksum ( + ACPI_TABLE_CDAT *CdatTable, + UINT32 Length) +{ + UINT8 Checksum; + + + /* Compute the checksum on the table */ + + Checksum = AcpiUtGenerateChecksum (ACPI_CAST_PTR (UINT8, CdatTable), + CdatTable->Length, CdatTable->Checksum); + + /* Computed checksum matches table? */ + + if (Checksum != CdatTable->Checksum) + { + ACPI_BIOS_WARNING ((AE_INFO, + "Incorrect checksum in table [%4.4s] - 0x%2.2X, " + "should be 0x%2.2X", + AcpiGbl_CDAT, CdatTable->Checksum, Checksum)); + +#if (ACPI_CHECKSUM_ABORT) + return (AE_BAD_CHECKSUM); +#endif + } + + CdatTable->Checksum = Checksum; + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtGenerateChecksum + * + * PARAMETERS: Table - Pointer to table to be checksummed + * Length - Length of the table + * OriginalChecksum - Value of the checksum field + * + * RETURN: 8 bit checksum of buffer + * + * DESCRIPTION: Computes an 8 bit checksum of the table. + * + ******************************************************************************/ + +UINT8 +AcpiUtGenerateChecksum ( + void *Table, + UINT32 Length, + UINT8 OriginalChecksum) +{ + UINT8 Checksum; + + + /* Sum the entire table as-is */ + + Checksum = AcpiUtChecksum ((UINT8 *) Table, Length); + + /* Subtract off the existing checksum value in the table */ + + Checksum = (UINT8) (Checksum - OriginalChecksum); + + /* Compute and return the final checksum */ + + Checksum = (UINT8) (0 - Checksum); + return (Checksum); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtChecksum + * + * PARAMETERS: Buffer - Pointer to memory region to be checked + * Length - Length of this memory region + * + * RETURN: Checksum (UINT8) + * + * DESCRIPTION: Calculates circular checksum of memory region. + * + ******************************************************************************/ + +UINT8 +AcpiUtChecksum ( + UINT8 *Buffer, + UINT32 Length) +{ + UINT8 Sum = 0; + UINT8 *End = Buffer + Length; + + + while (Buffer < End) + { + Sum = (UINT8) (Sum + *(Buffer++)); + } + + return (Sum); +} |