diff options
Diffstat (limited to 'sys/contrib/dev/acpica/tbutils.c')
| -rw-r--r-- | sys/contrib/dev/acpica/tbutils.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/tbutils.c b/sys/contrib/dev/acpica/tbutils.c new file mode 100644 index 0000000..773bd19 --- /dev/null +++ b/sys/contrib/dev/acpica/tbutils.c @@ -0,0 +1,323 @@ +/****************************************************************************** + * + * Module Name: tbutils - Table manipulation utilities + * $Revision: 57 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, 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. + * + *****************************************************************************/ + +#define __TBUTILS_C__ + +#include "acpi.h" +#include "actables.h" + + +#define _COMPONENT ACPI_TABLES + ACPI_MODULE_NAME ("tbutils") + + +/******************************************************************************* + * + * FUNCTION: AcpiTbHandleToObject + * + * PARAMETERS: TableId - Id for which the function is searching + * TableDesc - Pointer to return the matching table + * descriptor. + * + * RETURN: Search the tables to find one with a matching TableId and + * return a pointer to that table descriptor. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiTbHandleToObject ( + UINT16 TableId, + ACPI_TABLE_DESC **TableDesc) +{ + UINT32 i; + ACPI_TABLE_DESC *ListHead; + + + ACPI_FUNCTION_NAME ("TbHandleToObject"); + + + for (i = 0; i < ACPI_TABLE_MAX; i++) + { + ListHead = &AcpiGbl_AcpiTables[i]; + do + { + if (ListHead->TableId == TableId) + { + *TableDesc = ListHead; + return (AE_OK); + } + + ListHead = ListHead->Next; + + } while (ListHead != &AcpiGbl_AcpiTables[i]); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "TableId=%X does not exist\n", TableId)); + return (AE_BAD_PARAMETER); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbValidateTableHeader + * + * PARAMETERS: TableHeader - Logical pointer to the table + * + * RETURN: Status + * + * DESCRIPTION: Check an ACPI table header for validity + * + * NOTE: Table pointers are validated as follows: + * 1) Table pointer must point to valid physical memory + * 2) Signature must be 4 ASCII chars, even if we don't recognize the + * name + * 3) Table must be readable for length specified in the header + * 4) Table checksum must be valid (with the exception of the FACS + * which has no checksum because it contains variable fields) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiTbValidateTableHeader ( + ACPI_TABLE_HEADER *TableHeader) +{ + ACPI_NAME Signature; + + + ACPI_FUNCTION_NAME ("TbValidateTableHeader"); + + + /* Verify that this is a valid address */ + + if (!AcpiOsReadable (TableHeader, sizeof (ACPI_TABLE_HEADER))) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Cannot read table header at %p\n", TableHeader)); + return (AE_BAD_ADDRESS); + } + + /* Ensure that the signature is 4 ASCII characters */ + + ACPI_MOVE_UNALIGNED32_TO_32 (&Signature, TableHeader->Signature); + if (!AcpiUtValidAcpiName (Signature)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Table signature at %p [%p] has invalid characters\n", + TableHeader, &Signature)); + + ACPI_REPORT_WARNING (("Invalid table signature found: [%4.4s]\n", + (char *) &Signature)); + ACPI_DUMP_BUFFER (TableHeader, sizeof (ACPI_TABLE_HEADER)); + return (AE_BAD_SIGNATURE); + } + + /* Validate the table length */ + + if (TableHeader->Length < sizeof (ACPI_TABLE_HEADER)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Invalid length in table header %p name %4.4s\n", + TableHeader, (char *) &Signature)); + + ACPI_REPORT_WARNING (("Invalid table header length (0x%X) found\n", + (UINT32) TableHeader->Length)); + ACPI_DUMP_BUFFER (TableHeader, sizeof (ACPI_TABLE_HEADER)); + return (AE_BAD_HEADER); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbVerifyTableChecksum + * + * PARAMETERS: *TableHeader - ACPI table to verify + * + * RETURN: 8 bit checksum of table + * + * DESCRIPTION: Does an 8 bit checksum of table and returns status. A correct + * table should have a checksum of 0. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiTbVerifyTableChecksum ( + ACPI_TABLE_HEADER *TableHeader) +{ + UINT8 Checksum; + ACPI_STATUS Status = AE_OK; + + + ACPI_FUNCTION_TRACE ("TbVerifyTableChecksum"); + + + /* Compute the checksum on the table */ + + Checksum = AcpiTbChecksum (TableHeader, TableHeader->Length); + + /* Return the appropriate exception */ + + if (Checksum) + { + ACPI_REPORT_WARNING (("Invalid checksum in table [%4.4s] (%02X, sum %02X is not zero)\n", + TableHeader->Signature, (UINT32) TableHeader->Checksum, (UINT32) Checksum)); + + Status = AE_BAD_CHECKSUM; + } + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbChecksum + * + * PARAMETERS: Buffer - Buffer to checksum + * Length - Size of the buffer + * + * RETURNS 8 bit checksum of buffer + * + * DESCRIPTION: Computes an 8 bit checksum of the buffer(length) and returns it. + * + ******************************************************************************/ + +UINT8 +AcpiTbChecksum ( + void *Buffer, + UINT32 Length) +{ + const UINT8 *limit; + const UINT8 *rover; + UINT8 sum = 0; + + + if (Buffer && Length) + { + /* Buffer and Length are valid */ + + limit = (UINT8 *) Buffer + Length; + + for (rover = Buffer; rover < limit; rover++) + { + sum = (UINT8) (sum + *rover); + } + } + return (sum); +} + + |
