/****************************************************************************** * * Module Name: tbxfload - Table load/unload external interfaces * *****************************************************************************/ /* * Copyright (C) 2000 - 2016, Intel Corp. * All rights reserved. * * 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. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * 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 MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. */ #define EXPORT_ACPI_INTERFACES #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #include "actables.h" #include "acevents.h" #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME ("tbxfload") /******************************************************************************* * * FUNCTION: AcpiLoadTables * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT * ******************************************************************************/ ACPI_STATUS ACPI_INIT_FUNCTION AcpiLoadTables ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiLoadTables); /* * Install the default operation region handlers. These are the * handlers that are defined by the ACPI specification to be * "always accessible" -- namely, SystemMemory, SystemIO, and * PCI_Config. This also means that no _REG methods need to be * run for these address spaces. We need to have these handlers * installed before any AML code can be executed, especially any * module-level code (11/2015). * Note that we allow OSPMs to install their own region handlers * between AcpiInitializeSubsystem() and AcpiLoadTables() to use * their customized default region handlers. */ Status = AcpiEvInstallRegionHandlers (); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization")); return_ACPI_STATUS (Status); } /* Load the namespace from the tables */ Status = AcpiTbLoadNamespace (); /* Don't let single failures abort the load */ if (Status == AE_CTRL_TERMINATE) { Status = AE_OK; } if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "While loading namespace from ACPI tables")); } if (AcpiGbl_ParseTableAsTermList || !AcpiGbl_GroupModuleLevelCode) { /* * Initialize the objects that remain uninitialized. This * runs the executable AML that may be part of the * declaration of these objects: * OperationRegions, BufferFields, Buffers, and Packages. */ Status = AcpiNsInitializeObjects (); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } AcpiGbl_NamespaceInitialized = TRUE; return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables) /******************************************************************************* * * FUNCTION: AcpiTbLoadNamespace * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in * the RSDT/XSDT. * ******************************************************************************/ ACPI_STATUS AcpiTbLoadNamespace ( void) { ACPI_STATUS Status; UINT32 i; ACPI_TABLE_HEADER *NewDsdt; ACPI_TABLE_DESC *Table; UINT32 TablesLoaded = 0; UINT32 TablesFailed = 0; ACPI_FUNCTION_TRACE (TbLoadNamespace); (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); /* * Load the namespace. The DSDT is required, but any SSDT and * PSDT tables are optional. Verify the DSDT. */ Table = &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex]; if (!AcpiGbl_RootTableList.CurrentTableCount || !ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_DSDT) || ACPI_FAILURE (AcpiTbValidateTable (Table))) { Status = AE_NO_ACPI_TABLES; goto UnlockAndExit; } /* * Save the DSDT pointer for simple access. This is the mapped memory * address. We must take care here because the address of the .Tables * array can change dynamically as tables are loaded at run-time. Note: * .Pointer field is not validated until after call to AcpiTbValidateTable. */ AcpiGbl_DSDT = Table->Pointer; /* * Optionally copy the entire DSDT to local memory (instead of simply * mapping it.) There are some BIOSs that corrupt or replace the original * DSDT, creating the need for this option. Default is FALSE, do not copy * the DSDT. */ if (AcpiGbl_CopyDsdtLocally) { NewDsdt = AcpiTbCopyDsdt (AcpiGbl_DsdtIndex); if (NewDsdt) { AcpiGbl_DSDT = NewDsdt; } } /* * Save the original DSDT header for detection of table corruption * and/or replacement of the DSDT from outside the OS. */ memcpy (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT, sizeof (ACPI_TABLE_HEADER)); /* Load and parse tables */ (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); Status = AcpiNsLoadTable (AcpiGbl_DsdtIndex, AcpiGbl_RootNode); (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "[DSDT] table load failed")); TablesFailed++; } else { TablesLoaded++; } /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) { Table = &AcpiGbl_RootTableList.Tables[i]; if (!AcpiGbl_RootTableList.Tables[i].Address || (!ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_SSDT) && !ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_PSDT) && !ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_OSDT)) || ACPI_FAILURE (AcpiTbValidateTable (Table))) { continue; } /* Ignore errors while loading tables, get as many as possible */ (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); Status = AcpiNsLoadTable (i, AcpiGbl_RootNode); (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "(%4.4s:%8.8s) while loading table", Table->Signature.Ascii, Table->Pointer->OemTableId)); TablesFailed++; ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n", Table->Signature.Ascii, Table->Pointer->OemTableId)); } else { TablesLoaded++; } } if (!TablesFailed) { ACPI_INFO (( "%u ACPI AML tables successfully acquired and loaded", TablesLoaded)); } else { ACPI_ERROR ((AE_INFO, "%u table load failures, %u successful", TablesFailed, TablesLoaded)); /* Indicate at least one failure */ Status = AE_CTRL_TERMINATE; } #ifdef ACPI_APPLICATION ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "\n")); #endif UnlockAndExit: (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiInstallTable * * PARAMETERS: Address - Address of the ACPI table to be installed. * Physical - Whether the address is a physical table * address or not * * RETURN: Status * * DESCRIPTION: Dynamically install an ACPI table. * Note: This function should only be invoked after * AcpiInitializeTables() and before AcpiLoadTables(). * ******************************************************************************/ ACPI_STATUS ACPI_INIT_FUNCTION AcpiInstallTable ( ACPI_PHYSICAL_ADDRESS Address, BOOLEAN Physical) { ACPI_STATUS Status; UINT8 Flags; UINT32 TableIndex; ACPI_FUNCTION_TRACE (AcpiInstallTable); if (Physical) { Flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL; } else { Flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL; } Status = AcpiTbInstallStandardTable (Address, Flags, FALSE, FALSE, &TableIndex); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable) /******************************************************************************* * * FUNCTION: AcpiLoadTable * * PARAMETERS: Table - Pointer to a buffer containing the ACPI * table to be loaded. * * RETURN: Status * * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must * be a valid ACPI table with a valid ACPI table header. * Note1: Mainly intended to support hotplug addition of SSDTs. * Note2: Does not copy the incoming table. User is responsible * to ensure that the table is not deleted or unmapped. * ******************************************************************************/ ACPI_STATUS AcpiLoadTable ( ACPI_TABLE_HEADER *Table) { ACPI_STATUS Status; UINT32 TableIndex; ACPI_FUNCTION_TRACE (AcpiLoadTable); /* Parameter validation */ if (!Table) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Install the table and load it into the namespace */ ACPI_INFO (("Host-directed Dynamic ACPI Table Load:")); Status = AcpiTbInstallAndLoadTable (ACPI_PTR_TO_PHYSADDR (Table), ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, FALSE, &TableIndex); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiLoadTable) /******************************************************************************* * * FUNCTION: AcpiUnloadParentTable * * PARAMETERS: Object - Handle to any namespace object owned by * the table to be unloaded * * RETURN: Status * * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads * the table and deletes all namespace objects associated with * that table. Unloading of the DSDT is not allowed. * Note: Mainly intended to support hotplug removal of SSDTs. * ******************************************************************************/ ACPI_STATUS AcpiUnloadParentTable ( ACPI_HANDLE Object) { ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object); ACPI_STATUS Status = AE_NOT_EXIST; ACPI_OWNER_ID OwnerId; UINT32 i; ACPI_FUNCTION_TRACE (AcpiUnloadParentTable); /* Parameter validation */ if (!Object) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * The node OwnerId is currently the same as the parent table ID. * However, this could change in the future. */ OwnerId = Node->OwnerId; if (!OwnerId) { /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */ return_ACPI_STATUS (AE_TYPE); } /* Must acquire the table lock during this operation */ Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Find the table in the global table list */ for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++) { if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId) { continue; } /* * Allow unload of SSDT and OEMx tables only. Do not allow unload * of the DSDT. No other types of tables should get here, since * only these types can contain AML and thus are the only types * that can create namespace objects. */ if (ACPI_COMPARE_NAME ( AcpiGbl_RootTableList.Tables[i].Signature.Ascii, ACPI_SIG_DSDT)) { Status = AE_TYPE; break; } (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); Status = AcpiTbUnloadTable (i); (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); break; } (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)