/****************************************************************************** * * Module Name: tbutils - ACPI Table utilities * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2018, 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 "acpi.h" #include "accommon.h" #include "actables.h" #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME ("tbutils") /* Local prototypes */ static ACPI_PHYSICAL_ADDRESS AcpiTbGetRootTableEntry ( UINT8 *TableEntry, UINT32 TableEntrySize); #if (!ACPI_REDUCED_HARDWARE) /******************************************************************************* * * FUNCTION: AcpiTbInitializeFacs * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global * for accessing the Global Lock and Firmware Waking Vector * ******************************************************************************/ ACPI_STATUS AcpiTbInitializeFacs ( void) { ACPI_TABLE_FACS *Facs; /* If Hardware Reduced flag is set, there is no FACS */ if (AcpiGbl_ReducedHardware) { AcpiGbl_FACS = NULL; return (AE_OK); } else if (AcpiGbl_FADT.XFacs && (!AcpiGbl_FADT.Facs || !AcpiGbl_Use32BitFacsAddresses)) { (void) AcpiGetTableByIndex (AcpiGbl_XFacsIndex, ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs)); AcpiGbl_FACS = Facs; } else if (AcpiGbl_FADT.Facs) { (void) AcpiGetTableByIndex (AcpiGbl_FacsIndex, ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs)); AcpiGbl_FACS = Facs; } /* If there is no FACS, just continue. There was already an error msg */ return (AE_OK); } #endif /* !ACPI_REDUCED_HARDWARE */ /******************************************************************************* * * FUNCTION: AcpiTbCheckDsdtHeader * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect * if the DSDT has been replaced from outside the OS and/or if * the DSDT header has been corrupted. * ******************************************************************************/ void AcpiTbCheckDsdtHeader ( void) { /* Compare original length and checksum to current values */ if (AcpiGbl_OriginalDsdtHeader.Length != AcpiGbl_DSDT->Length || AcpiGbl_OriginalDsdtHeader.Checksum != AcpiGbl_DSDT->Checksum) { ACPI_BIOS_ERROR ((AE_INFO, "The DSDT has been corrupted or replaced - " "old, new headers below")); AcpiTbPrintTableHeader (0, &AcpiGbl_OriginalDsdtHeader); AcpiTbPrintTableHeader (0, AcpiGbl_DSDT); /* Disable further error messages */ AcpiGbl_OriginalDsdtHeader.Length = AcpiGbl_DSDT->Length; AcpiGbl_OriginalDsdtHeader.Checksum = AcpiGbl_DSDT->Checksum; } } /******************************************************************************* * * FUNCTION: AcpiTbCopyDsdt * * PARAMETERS: TableIndex - Index of installed table to copy * * RETURN: The copied DSDT * * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory. * Some very bad BIOSs are known to either corrupt the DSDT or * install a new, bad DSDT. This copy works around the problem. * ******************************************************************************/ ACPI_TABLE_HEADER * AcpiTbCopyDsdt ( UINT32 TableIndex) { ACPI_TABLE_HEADER *NewTable; ACPI_TABLE_DESC *TableDesc; TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex]; NewTable = ACPI_ALLOCATE (TableDesc->Length); if (!NewTable) { ACPI_ERROR ((AE_INFO, "Could not copy DSDT of length 0x%X", TableDesc->Length)); return (NULL); } memcpy (NewTable, TableDesc->Pointer, TableDesc->Length); AcpiTbUninstallTable (TableDesc); AcpiTbInitTableDescriptor ( &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex], ACPI_PTR_TO_PHYSADDR (NewTable), ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, NewTable); ACPI_INFO (( "Forced DSDT copy: length 0x%05X copied locally, original unmapped", NewTable->Length)); return (NewTable); } /******************************************************************************* * * FUNCTION: AcpiTbGetRootTableEntry * * PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry * TableEntrySize - sizeof 32 or 64 (RSDT or XSDT) * * RETURN: Physical address extracted from the root table * * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on * both 32-bit and 64-bit platforms * * NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on * 64-bit platforms. * ******************************************************************************/ static ACPI_PHYSICAL_ADDRESS AcpiTbGetRootTableEntry ( UINT8 *TableEntry, UINT32 TableEntrySize) { UINT64 Address64; /* * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT */ if (TableEntrySize == ACPI_RSDT_ENTRY_SIZE) { /* * 32-bit platform, RSDT: Return 32-bit table entry * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return */ return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR ( UINT32, TableEntry))); } else { /* * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, * return 64-bit */ ACPI_MOVE_64_TO_64 (&Address64, TableEntry); #if ACPI_MACHINE_WIDTH == 32 if (Address64 > ACPI_UINT32_MAX) { /* Will truncate 64-bit address to 32 bits, issue warning */ ACPI_BIOS_WARNING ((AE_INFO, "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," " truncating", ACPI_FORMAT_UINT64 (Address64))); } #endif return ((ACPI_PHYSICAL_ADDRESS) (Address64)); } } /******************************************************************************* * * FUNCTION: AcpiTbParseRootTable * * PARAMETERS: RsdpAddress - Pointer to the RSDP * * RETURN: Status * * DESCRIPTION: This function is called to parse the Root System Description * Table (RSDT or XSDT) * * NOTE: Tables are mapped (not copied) for efficiency. The FACS must * be mapped and cannot be copied because it contains the actual * memory location of the ACPI Global Lock. * ******************************************************************************/ ACPI_STATUS ACPI_INIT_FUNCTION AcpiTbParseRootTable ( ACPI_PHYSICAL_ADDRESS RsdpAddress) { ACPI_TABLE_RSDP *Rsdp; UINT32 TableEntrySize; UINT32 i; UINT32 TableCount; ACPI_TABLE_HEADER *Table; ACPI_PHYSICAL_ADDRESS Address; UINT32 Length; UINT8 *TableEntry; ACPI_STATUS Status; UINT32 TableIndex; ACPI_FUNCTION_TRACE (TbParseRootTable); /* Map the entire RSDP and extract the address of the RSDT or XSDT */ Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP)); if (!Rsdp) { return_ACPI_STATUS (AE_NO_MEMORY); } AcpiTbPrintTableHeader (RsdpAddress, ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp)); /* Use XSDT if present and not overridden. Otherwise, use RSDT */ if ((Rsdp->Revision > 1) && Rsdp->XsdtPhysicalAddress && !AcpiGbl_DoNotUseXsdt) { /* * RSDP contains an XSDT (64-bit physical addresses). We must use * the XSDT if the revision is > 1 and the XSDT pointer is present, * as per the ACPI specification. */ Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress; TableEntrySize = ACPI_XSDT_ENTRY_SIZE; } else { /* Root table is an RSDT (32-bit physical addresses) */ Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress; TableEntrySize = ACPI_RSDT_ENTRY_SIZE; } /* * It is not possible to map more than one entry in some environments, * so unmap the RSDP here before mapping other tables */ AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP)); /* Map the RSDT/XSDT table header to get the full table length */ Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); if (!Table) { return_ACPI_STATUS (AE_NO_MEMORY); } AcpiTbPrintTableHeader (Address, Table); /* * Validate length of the table, and map entire table. * Minimum length table must contain at least one entry. */ Length = Table->Length; AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER)); if (Length < (sizeof (ACPI_TABLE_HEADER) + TableEntrySize)) { ACPI_BIOS_ERROR ((AE_INFO, "Invalid table length 0x%X in RSDT/XSDT", Length)); return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); } Table = AcpiOsMapMemory (Address, Length); if (!Table) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Validate the root table checksum */ Status = AcpiTbVerifyChecksum (Table, Length); if (ACPI_FAILURE (Status)) { AcpiOsUnmapMemory (Table, Length); return_ACPI_STATUS (Status); } /* Get the number of entries and pointer to first entry */ TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) / TableEntrySize); TableEntry = ACPI_ADD_PTR (UINT8, Table, sizeof (ACPI_TABLE_HEADER)); /* Initialize the root table array from the RSDT/XSDT */ for (i = 0; i < TableCount; i++) { /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ Address = AcpiTbGetRootTableEntry (TableEntry, TableEntrySize); /* Skip NULL entries in RSDT/XSDT */ if (!Address) { goto NextTable; } Status = AcpiTbInstallStandardTable (Address, ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &TableIndex); if (ACPI_SUCCESS (Status) && ACPI_COMPARE_NAME ( &AcpiGbl_RootTableList.Tables[TableIndex].Signature, ACPI_SIG_FADT)) { AcpiGbl_FadtIndex = TableIndex; AcpiTbParseFadt (); } NextTable: TableEntry += TableEntrySize; } AcpiOsUnmapMemory (Table, Length); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiTbGetTable * * PARAMETERS: TableDesc - Table descriptor * OutTable - Where the pointer to the table is returned * * RETURN: Status and pointer to the requested table * * DESCRIPTION: Increase a reference to a table descriptor and return the * validated table pointer. * If the table descriptor is an entry of the root table list, * this API must be invoked with ACPI_MTX_TABLES acquired. * ******************************************************************************/ ACPI_STATUS AcpiTbGetTable ( ACPI_TABLE_DESC *TableDesc, ACPI_TABLE_HEADER **OutTable) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiTbGetTable); if (TableDesc->ValidationCount == 0) { /* Table need to be "VALIDATED" */ Status = AcpiTbValidateTable (TableDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS) { TableDesc->ValidationCount++; /* * Detect ValidationCount overflows to ensure that the warning * message will only be printed once. */ if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS) { ACPI_WARNING((AE_INFO, "Table %p, Validation count overflows\n", TableDesc)); } } *OutTable = TableDesc->Pointer; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiTbPutTable * * PARAMETERS: TableDesc - Table descriptor * * RETURN: None * * DESCRIPTION: Decrease a reference to a table descriptor and release the * validated table pointer if no references. * If the table descriptor is an entry of the root table list, * this API must be invoked with ACPI_MTX_TABLES acquired. * ******************************************************************************/ void AcpiTbPutTable ( ACPI_TABLE_DESC *TableDesc) { ACPI_FUNCTION_TRACE (AcpiTbPutTable); if (TableDesc->ValidationCount < ACPI_MAX_TABLE_VALIDATIONS) { TableDesc->ValidationCount--; /* * Detect ValidationCount underflows to ensure that the warning * message will only be printed once. */ if (TableDesc->ValidationCount >= ACPI_MAX_TABLE_VALIDATIONS) { ACPI_WARNING ((AE_INFO, "Table %p, Validation count underflows\n", TableDesc)); return_VOID; } } if (TableDesc->ValidationCount == 0) { /* Table need to be "INVALIDATED" */ AcpiTbInvalidateTable (TableDesc); } return_VOID; }