/****************************************************************************** * * Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch * $Revision: 1.171 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2008, 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 __EVREGION_C__ #include "acpi.h" #include "acevents.h" #include "acnamesp.h" #include "acinterp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evregion") #define ACPI_NUM_DEFAULT_SPACES 4 static UINT8 AcpiGbl_DefaultAddressSpaces[ACPI_NUM_DEFAULT_SPACES] = { ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_ADR_SPACE_SYSTEM_IO, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_ADR_SPACE_DATA_TABLE }; /* Local prototypes */ static ACPI_STATUS AcpiEvRegRun ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue); static ACPI_STATUS AcpiEvInstallHandler ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue); /******************************************************************************* * * FUNCTION: AcpiEvInstallRegionHandlers * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Installs the core subsystem default address space handlers. * ******************************************************************************/ ACPI_STATUS AcpiEvInstallRegionHandlers ( void) { ACPI_STATUS Status; UINT32 i; ACPI_FUNCTION_TRACE (EvInstallRegionHandlers); Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * All address spaces (PCI Config, EC, SMBus) are scope dependent * and registration must occur for a specific device. * * In the case of the system memory and IO address spaces there is currently * no device associated with the address space. For these we use the root. * * We install the default PCI config space handler at the root so * that this space is immediately available even though the we have * not enumerated all the PCI Root Buses yet. This is to conform * to the ACPI specification which states that the PCI config * space must be always available -- even though we are nowhere * near ready to find the PCI root buses at this point. * * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler * has already been installed (via AcpiInstallAddressSpaceHandler). * Similar for AE_SAME_HANDLER. */ for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { Status = AcpiEvInstallSpaceHandler (AcpiGbl_RootNode, AcpiGbl_DefaultAddressSpaces[i], ACPI_DEFAULT_HANDLER, NULL, NULL); switch (Status) { case AE_OK: case AE_SAME_HANDLER: case AE_ALREADY_EXISTS: /* These exceptions are all OK */ Status = AE_OK; break; default: goto UnlockAndExit; } } UnlockAndExit: (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvInitializeOpRegions * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Execute _REG methods for all Operation Regions that have * an installed default region handler. * ******************************************************************************/ ACPI_STATUS AcpiEvInitializeOpRegions ( void) { ACPI_STATUS Status; UINT32 i; ACPI_FUNCTION_TRACE (EvInitializeOpRegions); Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * Run the _REG methods for OpRegions in each default address space */ for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { /* TBD: Make sure handler is the DEFAULT handler, otherwise * _REG will have already been run. */ Status = AcpiEvExecuteRegMethods (AcpiGbl_RootNode, AcpiGbl_DefaultAddressSpaces[i]); } (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvExecuteRegMethod * * PARAMETERS: RegionObj - Region object * Function - Passed to _REG: On (1) or Off (0) * * RETURN: Status * * DESCRIPTION: Execute _REG method for a region * ******************************************************************************/ ACPI_STATUS AcpiEvExecuteRegMethod ( ACPI_OPERAND_OBJECT *RegionObj, UINT32 Function) { ACPI_EVALUATE_INFO *Info; ACPI_OPERAND_OBJECT *Args[3]; ACPI_OPERAND_OBJECT *RegionObj2; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (EvExecuteRegMethod); RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); if (!RegionObj2) { return_ACPI_STATUS (AE_NOT_EXIST); } if (RegionObj2->Extra.Method_REG == NULL) { return_ACPI_STATUS (AE_OK); } /* Allocate and initialize the evaluation information block */ Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); if (!Info) { return_ACPI_STATUS (AE_NO_MEMORY); } Info->PrefixNode = RegionObj2->Extra.Method_REG; Info->Pathname = NULL; Info->Parameters = Args; Info->Flags = ACPI_IGNORE_RETURN_VALUE; /* * The _REG method has two arguments: * * Arg0 - Integer: * Operation region space ID Same value as RegionObj->Region.SpaceId * * Arg1 - Integer: * connection status 1 for connecting the handler, 0 for disconnecting * the handler (Passed as a parameter) */ Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); if (!Args[0]) { Status = AE_NO_MEMORY; goto Cleanup1; } Args[1] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); if (!Args[1]) { Status = AE_NO_MEMORY; goto Cleanup2; } /* Setup the parameter objects */ Args[0]->Integer.Value = RegionObj->Region.SpaceId; Args[1]->Integer.Value = Function; Args[2] = NULL; /* Execute the method, no return value */ ACPI_DEBUG_EXEC ( AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL)); Status = AcpiNsEvaluate (Info); AcpiUtRemoveReference (Args[1]); Cleanup2: AcpiUtRemoveReference (Args[0]); Cleanup1: ACPI_FREE (Info); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvAddressSpaceDispatch * * PARAMETERS: RegionObj - Internal region object * Function - Read or Write operation * Address - Where in the space to read or write * BitWidth - Field width in bits (8, 16, 32, or 64) * Value - Pointer to in or out value, must be * full 64-bit ACPI_INTEGER * * RETURN: Status * * DESCRIPTION: Dispatch an address space or operation region access to * a previously installed handler. * ******************************************************************************/ ACPI_STATUS AcpiEvAddressSpaceDispatch ( ACPI_OPERAND_OBJECT *RegionObj, UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 BitWidth, ACPI_INTEGER *Value) { ACPI_STATUS Status; ACPI_ADR_SPACE_HANDLER Handler; ACPI_ADR_SPACE_SETUP RegionSetup; ACPI_OPERAND_OBJECT *HandlerDesc; ACPI_OPERAND_OBJECT *RegionObj2; void *RegionContext = NULL; ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch); RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); if (!RegionObj2) { return_ACPI_STATUS (AE_NOT_EXIST); } /* Ensure that there is a handler associated with this region */ HandlerDesc = RegionObj->Region.Handler; if (!HandlerDesc) { ACPI_ERROR ((AE_INFO, "No handler for Region [%4.4s] (%p) [%s]", AcpiUtGetNodeName (RegionObj->Region.Node), RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); return_ACPI_STATUS (AE_NOT_EXIST); } /* * It may be the case that the region has never been initialized * Some types of regions require special init code */ if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)) { /* * This region has not been initialized yet, do it */ RegionSetup = HandlerDesc->AddressSpace.Setup; if (!RegionSetup) { /* No initialization routine, exit with error */ ACPI_ERROR ((AE_INFO, "No init routine for region(%p) [%s]", RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); return_ACPI_STATUS (AE_NOT_EXIST); } /* * We must exit the interpreter because the region * setup will potentially execute control methods * (e.g., _REG method for this region) */ AcpiExExitInterpreter (); Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE, HandlerDesc->AddressSpace.Context, &RegionContext); /* Re-enter the interpreter */ AcpiExEnterInterpreter (); /* Check for failure of the Region Setup */ if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "During region initialization: [%s]", AcpiUtGetRegionName (RegionObj->Region.SpaceId))); return_ACPI_STATUS (Status); } /* * Region initialization may have been completed by RegionSetup */ if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)) { RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE; if (RegionObj2->Extra.RegionContext) { /* The handler for this region was already installed */ ACPI_FREE (RegionContext); } else { /* * Save the returned context for use in all accesses to * this particular region */ RegionObj2->Extra.RegionContext = RegionContext; } } } /* We have everything we need, we can invoke the address space handler */ Handler = HandlerDesc->AddressSpace.Handler; ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", &RegionObj->Region.Handler->AddressSpace, Handler, ACPI_FORMAT_NATIVE_UINT (Address), AcpiUtGetRegionName (RegionObj->Region.SpaceId))); if (!(HandlerDesc->AddressSpace.HandlerFlags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * For handlers other than the default (supplied) handlers, we must * exit the interpreter because the handler *might* block -- we don't * know what it will do, so we can't hold the lock on the intepreter. */ AcpiExExitInterpreter(); } /* Call the handler */ Status = Handler (Function, Address, BitWidth, Value, HandlerDesc->AddressSpace.Context, RegionObj2->Extra.RegionContext); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Returned by Handler for [%s]", AcpiUtGetRegionName (RegionObj->Region.SpaceId))); } if (!(HandlerDesc->AddressSpace.HandlerFlags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { /* * We just returned from a non-default handler, we must re-enter the * interpreter */ AcpiExEnterInterpreter (); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvDetachRegion * * PARAMETERS: RegionObj - Region Object * AcpiNsIsLocked - Namespace Region Already Locked? * * RETURN: None * * DESCRIPTION: Break the association between the handler and the region * this is a two way association. * ******************************************************************************/ void AcpiEvDetachRegion( ACPI_OPERAND_OBJECT *RegionObj, BOOLEAN AcpiNsIsLocked) { ACPI_OPERAND_OBJECT *HandlerObj; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_OPERAND_OBJECT **LastObjPtr; ACPI_ADR_SPACE_SETUP RegionSetup; void **RegionContext; ACPI_OPERAND_OBJECT *RegionObj2; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (EvDetachRegion); RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); if (!RegionObj2) { return_VOID; } RegionContext = &RegionObj2->Extra.RegionContext; /* Get the address handler from the region object */ HandlerObj = RegionObj->Region.Handler; if (!HandlerObj) { /* This region has no handler, all done */ return_VOID; } /* Find this region in the handler's list */ ObjDesc = HandlerObj->AddressSpace.RegionList; LastObjPtr = &HandlerObj->AddressSpace.RegionList; while (ObjDesc) { /* Is this the correct Region? */ if (ObjDesc == RegionObj) { ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Removing Region %p from address handler %p\n", RegionObj, HandlerObj)); /* This is it, remove it from the handler's list */ *LastObjPtr = ObjDesc->Region.Next; ObjDesc->Region.Next = NULL; /* Must clear field */ if (AcpiNsIsLocked) { Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_VOID; } } /* Now stop region accesses by executing the _REG method */ Status = AcpiEvExecuteRegMethod (RegionObj, 0); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]", AcpiUtGetRegionName (RegionObj->Region.SpaceId))); } if (AcpiNsIsLocked) { Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_VOID; } } /* * If the region has been activated, call the setup handler * with the deactivate notification */ if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) { RegionSetup = HandlerObj->AddressSpace.Setup; Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE, HandlerObj->AddressSpace.Context, RegionContext); /* Init routine may fail, Just ignore errors */ if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "from region handler - deactivate, [%s]", AcpiUtGetRegionName (RegionObj->Region.SpaceId))); } RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE); } /* * Remove handler reference in the region * * NOTE: this doesn't mean that the region goes away, the region * is just inaccessible as indicated to the _REG method * * If the region is on the handler's list, this must be the * region's handler */ RegionObj->Region.Handler = NULL; AcpiUtRemoveReference (HandlerObj); return_VOID; } /* Walk the linked list of handlers */ LastObjPtr = &ObjDesc->Region.Next; ObjDesc = ObjDesc->Region.Next; } /* If we get here, the region was not in the handler's region list */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Cannot remove region %p from address handler %p\n", RegionObj, HandlerObj)); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiEvAttachRegion * * PARAMETERS: HandlerObj - Handler Object * RegionObj - Region Object * AcpiNsIsLocked - Namespace Region Already Locked? * * RETURN: None * * DESCRIPTION: Create the association between the handler and the region * this is a two way association. * ******************************************************************************/ ACPI_STATUS AcpiEvAttachRegion ( ACPI_OPERAND_OBJECT *HandlerObj, ACPI_OPERAND_OBJECT *RegionObj, BOOLEAN AcpiNsIsLocked) { ACPI_FUNCTION_TRACE (EvAttachRegion); ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Adding Region [%4.4s] %p to address handler %p [%s]\n", AcpiUtGetNodeName (RegionObj->Region.Node), RegionObj, HandlerObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); /* Link this region to the front of the handler's list */ RegionObj->Region.Next = HandlerObj->AddressSpace.RegionList; HandlerObj->AddressSpace.RegionList = RegionObj; /* Install the region's handler */ if (RegionObj->Region.Handler) { return_ACPI_STATUS (AE_ALREADY_EXISTS); } RegionObj->Region.Handler = HandlerObj; AcpiUtAddReference (HandlerObj); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvInstallHandler * * PARAMETERS: WalkNamespace callback * * DESCRIPTION: This routine installs an address handler into objects that are * of type Region or Device. * * If the Object is a Device, and the device has a handler of * the same type then the search is terminated in that branch. * * This is because the existing handler is closer in proximity * to any more regions than the one we are trying to install. * ******************************************************************************/ static ACPI_STATUS AcpiEvInstallHandler ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue) { ACPI_OPERAND_OBJECT *HandlerObj; ACPI_OPERAND_OBJECT *NextHandlerObj; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_NAMESPACE_NODE *Node; ACPI_STATUS Status; ACPI_FUNCTION_NAME (EvInstallHandler); HandlerObj = (ACPI_OPERAND_OBJECT *) Context; /* Parameter validation */ if (!HandlerObj) { return (AE_OK); } /* Convert and validate the device handle */ Node = AcpiNsMapHandleToNode (ObjHandle); if (!Node) { return (AE_BAD_PARAMETER); } /* * We only care about regions.and objects * that are allowed to have address space handlers */ if ((Node->Type != ACPI_TYPE_DEVICE) && (Node->Type != ACPI_TYPE_REGION) && (Node != AcpiGbl_RootNode)) { return (AE_OK); } /* Check for an existing internal object */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { /* No object, just exit */ return (AE_OK); } /* Devices are handled different than regions */ if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_DEVICE) { /* Check if this Device already has a handler for this address space */ NextHandlerObj = ObjDesc->Device.Handler; while (NextHandlerObj) { /* Found a handler, is it for the same address space? */ if (NextHandlerObj->AddressSpace.SpaceId == HandlerObj->AddressSpace.SpaceId) { ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Found handler for region [%s] in device %p(%p) handler %p\n", AcpiUtGetRegionName (HandlerObj->AddressSpace.SpaceId), ObjDesc, NextHandlerObj, HandlerObj)); /* * Since the object we found it on was a device, then it * means that someone has already installed a handler for * the branch of the namespace from this device on. Just * bail out telling the walk routine to not traverse this * branch. This preserves the scoping rule for handlers. */ return (AE_CTRL_DEPTH); } /* Walk the linked list of handlers attached to this device */ NextHandlerObj = NextHandlerObj->AddressSpace.Next; } /* * As long as the device didn't have a handler for this * space we don't care about it. We just ignore it and * proceed. */ return (AE_OK); } /* Object is a Region */ if (ObjDesc->Region.SpaceId != HandlerObj->AddressSpace.SpaceId) { /* * This region is for a different address space * -- just ignore it */ return (AE_OK); } /* * Now we have a region and it is for the handler's address * space type. * * First disconnect region for any previous handler (if any) */ AcpiEvDetachRegion (ObjDesc, FALSE); /* Connect the region to the new handler */ Status = AcpiEvAttachRegion (HandlerObj, ObjDesc, FALSE); return (Status); } /******************************************************************************* * * FUNCTION: AcpiEvInstallSpaceHandler * * PARAMETERS: Node - Namespace node for the device * SpaceId - The address space ID * Handler - Address of the handler * Setup - Address of the setup function * Context - Value passed to the handler on each access * * RETURN: Status * * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. * Assumes namespace is locked * ******************************************************************************/ ACPI_STATUS AcpiEvInstallSpaceHandler ( ACPI_NAMESPACE_NODE *Node, ACPI_ADR_SPACE_TYPE SpaceId, ACPI_ADR_SPACE_HANDLER Handler, ACPI_ADR_SPACE_SETUP Setup, void *Context) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_OPERAND_OBJECT *HandlerObj; ACPI_STATUS Status; ACPI_OBJECT_TYPE Type; UINT8 Flags = 0; ACPI_FUNCTION_TRACE (EvInstallSpaceHandler); /* * This registration is valid for only the types below * and the root. This is where the default handlers * get placed. */ if ((Node->Type != ACPI_TYPE_DEVICE) && (Node->Type != ACPI_TYPE_PROCESSOR) && (Node->Type != ACPI_TYPE_THERMAL) && (Node != AcpiGbl_RootNode)) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } if (Handler == ACPI_DEFAULT_HANDLER) { Flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; switch (SpaceId) { case ACPI_ADR_SPACE_SYSTEM_MEMORY: Handler = AcpiExSystemMemorySpaceHandler; Setup = AcpiEvSystemMemoryRegionSetup; break; case ACPI_ADR_SPACE_SYSTEM_IO: Handler = AcpiExSystemIoSpaceHandler; Setup = AcpiEvIoSpaceRegionSetup; break; case ACPI_ADR_SPACE_PCI_CONFIG: Handler = AcpiExPciConfigSpaceHandler; Setup = AcpiEvPciConfigRegionSetup; break; case ACPI_ADR_SPACE_CMOS: Handler = AcpiExCmosSpaceHandler; Setup = AcpiEvCmosRegionSetup; break; case ACPI_ADR_SPACE_PCI_BAR_TARGET: Handler = AcpiExPciBarSpaceHandler; Setup = AcpiEvPciBarRegionSetup; break; case ACPI_ADR_SPACE_DATA_TABLE: Handler = AcpiExDataTableSpaceHandler; Setup = NULL; break; default: Status = AE_BAD_PARAMETER; goto UnlockAndExit; } } /* If the caller hasn't specified a setup routine, use the default */ if (!Setup) { Setup = AcpiEvDefaultRegionSetup; } /* Check for an existing internal object */ ObjDesc = AcpiNsGetAttachedObject (Node); if (ObjDesc) { /* * The attached device object already exists. * Make sure the handler is not already installed. */ HandlerObj = ObjDesc->Device.Handler; /* Walk the handler list for this device */ while (HandlerObj) { /* Same SpaceId indicates a handler already installed */ if (HandlerObj->AddressSpace.SpaceId == SpaceId) { if (HandlerObj->AddressSpace.Handler == Handler) { /* * It is (relatively) OK to attempt to install the SAME * handler twice. This can easily happen * with PCI_Config space. */ Status = AE_SAME_HANDLER; goto UnlockAndExit; } else { /* A handler is already installed */ Status = AE_ALREADY_EXISTS; } goto UnlockAndExit; } /* Walk the linked list of handlers */ HandlerObj = HandlerObj->AddressSpace.Next; } } else { ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Creating object on Device %p while installing handler\n", Node)); /* ObjDesc does not exist, create one */ if (Node->Type == ACPI_TYPE_ANY) { Type = ACPI_TYPE_DEVICE; } else { Type = Node->Type; } ObjDesc = AcpiUtCreateInternalObject (Type); if (!ObjDesc) { Status = AE_NO_MEMORY; goto UnlockAndExit; } /* Init new descriptor */ ObjDesc->Common.Type = (UINT8) Type; /* Attach the new object to the Node */ Status = AcpiNsAttachObject (Node, ObjDesc, Type); /* Remove local reference to the object */ AcpiUtRemoveReference (ObjDesc); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } } ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", AcpiUtGetRegionName (SpaceId), SpaceId, AcpiUtGetNodeName (Node), Node, ObjDesc)); /* * Install the handler * * At this point there is no existing handler. * Just allocate the object for the handler and link it * into the list. */ HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_ADDRESS_HANDLER); if (!HandlerObj) { Status = AE_NO_MEMORY; goto UnlockAndExit; } /* Init handler obj */ HandlerObj->AddressSpace.SpaceId = (UINT8) SpaceId; HandlerObj->AddressSpace.HandlerFlags = Flags; HandlerObj->AddressSpace.RegionList = NULL; HandlerObj->AddressSpace.Node = Node; HandlerObj->AddressSpace.Handler = Handler; HandlerObj->AddressSpace.Context = Context; HandlerObj->AddressSpace.Setup = Setup; /* Install at head of Device.AddressSpace list */ HandlerObj->AddressSpace.Next = ObjDesc->Device.Handler; /* * The Device object is the first reference on the HandlerObj. * Each region that uses the handler adds a reference. */ ObjDesc->Device.Handler = HandlerObj; /* * Walk the namespace finding all of the regions this * handler will manage. * * Start at the device and search the branch toward * the leaf nodes until either the leaf is encountered or * a device is detected that has an address handler of the * same type. * * In either case, back up and search down the remainder * of the branch */ Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, AcpiEvInstallHandler, HandlerObj, NULL); UnlockAndExit: return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvExecuteRegMethods * * PARAMETERS: Node - Namespace node for the device * SpaceId - The address space ID * * RETURN: Status * * DESCRIPTION: Run all _REG methods for the input Space ID; * Note: assumes namespace is locked, or system init time. * ******************************************************************************/ ACPI_STATUS AcpiEvExecuteRegMethods ( ACPI_NAMESPACE_NODE *Node, ACPI_ADR_SPACE_TYPE SpaceId) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (EvExecuteRegMethods); /* * Run all _REG methods for all Operation Regions for this * space ID. This is a separate walk in order to handle any * interdependencies between regions and _REG methods. (i.e. handlers * must be installed for all regions of this Space ID before we * can run any _REG methods) */ Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, AcpiEvRegRun, &SpaceId, NULL); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiEvRegRun * * PARAMETERS: WalkNamespace callback * * DESCRIPTION: Run _REG method for region objects of the requested spaceID * ******************************************************************************/ static ACPI_STATUS AcpiEvRegRun ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_NAMESPACE_NODE *Node; ACPI_ADR_SPACE_TYPE SpaceId; ACPI_STATUS Status; SpaceId = *ACPI_CAST_PTR (ACPI_ADR_SPACE_TYPE, Context); /* Convert and validate the device handle */ Node = AcpiNsMapHandleToNode (ObjHandle); if (!Node) { return (AE_BAD_PARAMETER); } /* * We only care about regions.and objects * that are allowed to have address space handlers */ if ((Node->Type != ACPI_TYPE_REGION) && (Node != AcpiGbl_RootNode)) { return (AE_OK); } /* Check for an existing internal object */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { /* No object, just exit */ return (AE_OK); } /* Object is a Region */ if (ObjDesc->Region.SpaceId != SpaceId) { /* * This region is for a different address space * -- just ignore it */ return (AE_OK); } Status = AcpiEvExecuteRegMethod (ObjDesc, 1); return (Status); }