/****************************************************************************** * * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2009, 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 __EXCONFIG_C__ #include #include #include #include #include #include #include #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exconfig") /* Local prototypes */ static ACPI_STATUS AcpiExAddTable ( UINT32 TableIndex, ACPI_NAMESPACE_NODE *ParentNode, ACPI_OPERAND_OBJECT **DdbHandle); static ACPI_STATUS AcpiExRegionRead ( ACPI_OPERAND_OBJECT *ObjDesc, UINT32 Length, UINT8 *Buffer); /******************************************************************************* * * FUNCTION: AcpiExAddTable * * PARAMETERS: Table - Pointer to raw table * ParentNode - Where to load the table (scope) * DdbHandle - Where to return the table handle. * * RETURN: Status * * DESCRIPTION: Common function to Install and Load an ACPI table with a * returned table handle. * ******************************************************************************/ static ACPI_STATUS AcpiExAddTable ( UINT32 TableIndex, ACPI_NAMESPACE_NODE *ParentNode, ACPI_OPERAND_OBJECT **DdbHandle) { ACPI_STATUS Status; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_FUNCTION_TRACE (ExAddTable); /* Create an object to be the table handle */ ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); if (!ObjDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Init the table handle */ ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID; ObjDesc->Reference.Class = ACPI_REFCLASS_TABLE; *DdbHandle = ObjDesc; /* Install the new table into the local data structures */ ObjDesc->Reference.Value = TableIndex; /* Add the table to the namespace */ Status = AcpiNsLoadTable (TableIndex, ParentNode); if (ACPI_FAILURE (Status)) { AcpiUtRemoveReference (ObjDesc); *DdbHandle = NULL; } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExLoadTableOp * * PARAMETERS: WalkState - Current state with operands * ReturnDesc - Where to store the return object * * RETURN: Status * * DESCRIPTION: Load an ACPI table from the RSDT/XSDT * ******************************************************************************/ ACPI_STATUS AcpiExLoadTableOp ( ACPI_WALK_STATE *WalkState, ACPI_OPERAND_OBJECT **ReturnDesc) { ACPI_STATUS Status; ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; ACPI_NAMESPACE_NODE *ParentNode; ACPI_NAMESPACE_NODE *StartNode; ACPI_NAMESPACE_NODE *ParameterNode = NULL; ACPI_OPERAND_OBJECT *DdbHandle; ACPI_TABLE_HEADER *Table; UINT32 TableIndex; ACPI_FUNCTION_TRACE (ExLoadTableOp); /* Validate lengths for the SignatureString, OEMIDString, OEMTableID */ if ((Operand[0]->String.Length > ACPI_NAME_SIZE) || (Operand[1]->String.Length > ACPI_OEM_ID_SIZE) || (Operand[2]->String.Length > ACPI_OEM_TABLE_ID_SIZE)) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Find the ACPI table in the RSDT/XSDT */ Status = AcpiTbFindTable (Operand[0]->String.Pointer, Operand[1]->String.Pointer, Operand[2]->String.Pointer, &TableIndex); if (ACPI_FAILURE (Status)) { if (Status != AE_NOT_FOUND) { return_ACPI_STATUS (Status); } /* Table not found, return an Integer=0 and AE_OK */ DdbHandle = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); if (!DdbHandle) { return_ACPI_STATUS (AE_NO_MEMORY); } DdbHandle->Integer.Value = 0; *ReturnDesc = DdbHandle; return_ACPI_STATUS (AE_OK); } /* Default nodes */ StartNode = WalkState->ScopeInfo->Scope.Node; ParentNode = AcpiGbl_RootNode; /* RootPath (optional parameter) */ if (Operand[3]->String.Length > 0) { /* * Find the node referenced by the RootPathString. This is the * location within the namespace where the table will be loaded. */ Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer, ACPI_NS_SEARCH_PARENT, &ParentNode); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } /* ParameterPath (optional parameter) */ if (Operand[4]->String.Length > 0) { if ((Operand[4]->String.Pointer[0] != '\\') && (Operand[4]->String.Pointer[0] != '^')) { /* * Path is not absolute, so it will be relative to the node * referenced by the RootPathString (or the NS root if omitted) */ StartNode = ParentNode; } /* Find the node referenced by the ParameterPathString */ Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer, ACPI_NS_SEARCH_PARENT, &ParameterNode); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } /* Load the table into the namespace */ Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Parameter Data (optional) */ if (ParameterNode) { /* Store the parameter data into the optional parameter object */ Status = AcpiExStore (Operand[5], ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), WalkState); if (ACPI_FAILURE (Status)) { (void) AcpiExUnloadTable (DdbHandle); AcpiUtRemoveReference (DdbHandle); return_ACPI_STATUS (Status); } } Status = AcpiGetTableByIndex (TableIndex, &Table); if (ACPI_SUCCESS (Status)) { ACPI_INFO ((AE_INFO, "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]", Table->Signature, Table->OemId, Table->OemTableId)); } /* Invoke table handler if present */ if (AcpiGbl_TableHandler) { (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table, AcpiGbl_TableHandlerContext); } *ReturnDesc = DdbHandle; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExRegionRead * * PARAMETERS: ObjDesc - Region descriptor * Length - Number of bytes to read * Buffer - Pointer to where to put the data * * RETURN: Status * * DESCRIPTION: Read data from an operation region. The read starts from the * beginning of the region. * ******************************************************************************/ static ACPI_STATUS AcpiExRegionRead ( ACPI_OPERAND_OBJECT *ObjDesc, UINT32 Length, UINT8 *Buffer) { ACPI_STATUS Status; ACPI_INTEGER Value; UINT32 RegionOffset = 0; UINT32 i; /* Bytewise reads */ for (i = 0; i < Length; i++) { Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ, RegionOffset, 8, &Value); if (ACPI_FAILURE (Status)) { return (Status); } *Buffer = (UINT8) Value; Buffer++; RegionOffset++; } return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiExLoadOp * * PARAMETERS: ObjDesc - Region or Buffer/Field where the table will be * obtained * Target - Where a handle to the table will be stored * WalkState - Current state * * RETURN: Status * * DESCRIPTION: Load an ACPI table from a field or operation region * * NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer * objects before this code is reached. * * If source is an operation region, it must refer to SystemMemory, as * per the ACPI specification. * ******************************************************************************/ ACPI_STATUS AcpiExLoadOp ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT *Target, ACPI_WALK_STATE *WalkState) { ACPI_OPERAND_OBJECT *DdbHandle; ACPI_TABLE_HEADER *Table; ACPI_TABLE_DESC TableDesc; UINT32 TableIndex; ACPI_STATUS Status; UINT32 Length; ACPI_FUNCTION_TRACE (ExLoadOp); ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC)); /* Source Object can be either an OpRegion or a Buffer/Field */ switch (ObjDesc->Common.Type) { case ACPI_TYPE_REGION: ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load table from Region %p\n", ObjDesc)); /* Region must be SystemMemory (from ACPI spec) */ if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) { return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* * If the Region Address and Length have not been previously evaluated, * evaluate them now and save the results. */ if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetRegionArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } /* Get the table header first so we can get the table length */ Table = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER)); if (!Table) { return_ACPI_STATUS (AE_NO_MEMORY); } Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER), ACPI_CAST_PTR (UINT8, Table)); Length = Table->Length; ACPI_FREE (Table); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Must have at least an ACPI table header */ if (Length < sizeof (ACPI_TABLE_HEADER)) { return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); } /* * The original implementation simply mapped the table, with no copy. * However, the memory region is not guaranteed to remain stable and * we must copy the table to a local buffer. For example, the memory * region is corrupted after suspend on some machines. Dynamically * loaded tables are usually small, so this overhead is minimal. * * The latest implementation (5/2009) does not use a mapping at all. * We use the low-level operation region interface to read the table * instead of the obvious optimization of using a direct mapping. * This maintains a consistent use of operation regions across the * entire subsystem. This is important if additional processing must * be performed in the (possibly user-installed) operation region * handler. For example, AcpiExec and ASLTS depend on this. */ /* Allocate a buffer for the table */ TableDesc.Pointer = ACPI_ALLOCATE (Length); if (!TableDesc.Pointer) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Read the entire table */ Status = AcpiExRegionRead (ObjDesc, Length, ACPI_CAST_PTR (UINT8, TableDesc.Pointer)); if (ACPI_FAILURE (Status)) { ACPI_FREE (TableDesc.Pointer); return_ACPI_STATUS (Status); } TableDesc.Address = ObjDesc->Region.Address; break; case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load table from Buffer or Field %p\n", ObjDesc)); /* Must have at least an ACPI table header */ if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER)) { return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); } /* Get the actual table length from the table header */ Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer); Length = Table->Length; /* Table cannot extend beyond the buffer */ if (Length > ObjDesc->Buffer.Length) { return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); } if (Length < sizeof (ACPI_TABLE_HEADER)) { return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); } /* * Copy the table from the buffer because the buffer could be modified * or even deleted in the future */ TableDesc.Pointer = ACPI_ALLOCATE (Length); if (!TableDesc.Pointer) { return_ACPI_STATUS (AE_NO_MEMORY); } ACPI_MEMCPY (TableDesc.Pointer, Table, Length); TableDesc.Address = ACPI_TO_INTEGER (TableDesc.Pointer); break; default: return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* Validate table checksum (will not get validated in TbAddTable) */ Status = AcpiTbVerifyChecksum (TableDesc.Pointer, Length); if (ACPI_FAILURE (Status)) { ACPI_FREE (TableDesc.Pointer); return_ACPI_STATUS (Status); } /* Complete the table descriptor */ TableDesc.Length = Length; TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED; /* Install the new table into the local data structures */ Status = AcpiTbAddTable (&TableDesc, &TableIndex); if (ACPI_FAILURE (Status)) { goto Cleanup; } /* * Add the table to the namespace. * * Note: Load the table objects relative to the root of the namespace. * This appears to go against the ACPI specification, but we do it for * compatibility with other ACPI implementations. */ Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle); if (ACPI_FAILURE (Status)) { /* On error, TablePtr was deallocated above */ return_ACPI_STATUS (Status); } /* Store the DdbHandle into the Target operand */ Status = AcpiExStore (DdbHandle, Target, WalkState); if (ACPI_FAILURE (Status)) { (void) AcpiExUnloadTable (DdbHandle); /* TablePtr was deallocated above */ AcpiUtRemoveReference (DdbHandle); return_ACPI_STATUS (Status); } /* Remove the reference by added by AcpiExStore above */ AcpiUtRemoveReference (DdbHandle); /* Invoke table handler if present */ if (AcpiGbl_TableHandler) { (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, TableDesc.Pointer, AcpiGbl_TableHandlerContext); } Cleanup: if (ACPI_FAILURE (Status)) { /* Delete allocated table buffer */ AcpiTbDeleteTable (&TableDesc); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExUnloadTable * * PARAMETERS: DdbHandle - Handle to a previously loaded table * * RETURN: Status * * DESCRIPTION: Unload an ACPI table * ******************************************************************************/ ACPI_STATUS AcpiExUnloadTable ( ACPI_OPERAND_OBJECT *DdbHandle) { ACPI_STATUS Status = AE_OK; ACPI_OPERAND_OBJECT *TableDesc = DdbHandle; UINT32 TableIndex; ACPI_TABLE_HEADER *Table; ACPI_FUNCTION_TRACE (ExUnloadTable); /* * Validate the handle * Although the handle is partially validated in AcpiExReconfiguration() * when it calls AcpiExResolveOperands(), the handle is more completely * validated here. * * Handle must be a valid operand object of type reference. Also, the * DdbHandle must still be marked valid (table has not been previously * unloaded) */ if ((!DdbHandle) || (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) || (DdbHandle->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) || (!(DdbHandle->Common.Flags & AOPOBJ_DATA_VALID))) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Get the table index from the DdbHandle */ TableIndex = TableDesc->Reference.Value; /* Ensure the table is still loaded */ if (!AcpiTbIsTableLoaded (TableIndex)) { return_ACPI_STATUS (AE_NOT_EXIST); } /* Invoke table handler if present */ if (AcpiGbl_TableHandler) { Status = AcpiGetTableByIndex (TableIndex, &Table); if (ACPI_SUCCESS (Status)) { (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD, Table, AcpiGbl_TableHandlerContext); } } /* Delete the portion of the namespace owned by this table */ Status = AcpiTbDeleteNamespaceByOwner (TableIndex); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } (void) AcpiTbReleaseOwnerId (TableIndex); AcpiTbSetTableLoadedFlag (TableIndex, FALSE); /* * Invalidate the handle. We do this because the handle may be stored * in a named object and may not be actually deleted until much later. */ DdbHandle->Common.Flags &= ~AOPOBJ_DATA_VALID; return_ACPI_STATUS (AE_OK); }