evregion.c revision 91116
167754Smsmith/****************************************************************************** 267754Smsmith * 369450Smsmith * Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch 491116Smsmith * $Revision: 128 $ 567754Smsmith * 667754Smsmith *****************************************************************************/ 767754Smsmith 867754Smsmith/****************************************************************************** 967754Smsmith * 1067754Smsmith * 1. Copyright Notice 1167754Smsmith * 1291116Smsmith * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 1370243Smsmith * All rights reserved. 1467754Smsmith * 1567754Smsmith * 2. License 1667754Smsmith * 1767754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1867754Smsmith * rights. You may have additional license terms from the party that provided 1967754Smsmith * you this software, covering your right to use that party's intellectual 2067754Smsmith * property rights. 2167754Smsmith * 2267754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2367754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2467754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2567754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2667754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2767754Smsmith * Code in any form, with the right to sublicense such rights; and 2867754Smsmith * 2967754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3067754Smsmith * license (with the right to sublicense), under only those claims of Intel 3167754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3267754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3367754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3467754Smsmith * license, and in no event shall the patent license extend to any additions 3567754Smsmith * to or modifications of the Original Intel Code. No other license or right 3667754Smsmith * is granted directly or by implication, estoppel or otherwise; 3767754Smsmith * 3867754Smsmith * The above copyright and patent license is granted only if the following 3967754Smsmith * conditions are met: 4067754Smsmith * 4167754Smsmith * 3. Conditions 4267754Smsmith * 4367754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4467754Smsmith * Redistribution of source code of any substantial portion of the Covered 4567754Smsmith * Code or modification with rights to further distribute source must include 4667754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4767754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4867754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4967754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5067754Smsmith * Code and the date of any change. Licensee must include in that file the 5167754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5267754Smsmith * must include a prominent statement that the modification is derived, 5367754Smsmith * directly or indirectly, from Original Intel Code. 5467754Smsmith * 5567754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5667754Smsmith * Redistribution of source code of any substantial portion of the Covered 5767754Smsmith * Code or modification without rights to further distribute source must 5867754Smsmith * include the following Disclaimer and Export Compliance provision in the 5967754Smsmith * documentation and/or other materials provided with distribution. In 6067754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6167754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6267754Smsmith * license from Licensee to its licensee is limited to the intellectual 6367754Smsmith * property embodied in the software Licensee provides to its licensee, and 6467754Smsmith * not to intellectual property embodied in modifications its licensee may 6567754Smsmith * make. 6667754Smsmith * 6767754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6867754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6967754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7067754Smsmith * provision in the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7467754Smsmith * Intel Code. 7567754Smsmith * 7667754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7767754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7867754Smsmith * other dealings in products derived from or relating to the Covered Code 7967754Smsmith * without prior written authorization from Intel. 8067754Smsmith * 8167754Smsmith * 4. Disclaimer and Export Compliance 8267754Smsmith * 8367754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8467754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8567754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8667754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8767754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8867754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8967754Smsmith * PARTICULAR PURPOSE. 9067754Smsmith * 9167754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9267754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9367754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9467754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9567754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9667754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9767754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9867754Smsmith * LIMITED REMEDY. 9967754Smsmith * 10067754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10167754Smsmith * software or system incorporating such software without first obtaining any 10267754Smsmith * required license or other approval from the U. S. Department of Commerce or 10367754Smsmith * any other agency or department of the United States Government. In the 10467754Smsmith * event Licensee exports any such software from the United States or 10567754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10667754Smsmith * ensure that the distribution and export/re-export of the software is in 10767754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10867754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10967754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11067754Smsmith * software, or service, directly or indirectly, to any country for which the 11167754Smsmith * United States government or any agency thereof requires an export license, 11267754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11367754Smsmith * such license, approval or letter. 11467754Smsmith * 11567754Smsmith *****************************************************************************/ 11667754Smsmith 11767754Smsmith 11867754Smsmith#define __EVREGION_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "acevents.h" 12267754Smsmith#include "acnamesp.h" 12367754Smsmith#include "acinterp.h" 12467754Smsmith#include "amlcode.h" 12567754Smsmith 12677424Smsmith#define _COMPONENT ACPI_EVENTS 12791116Smsmith ACPI_MODULE_NAME ("evregion") 12867754Smsmith 12967754Smsmith 13077424Smsmith/******************************************************************************* 13167754Smsmith * 13267754Smsmith * FUNCTION: AcpiEvInstallDefaultAddressSpaceHandlers 13367754Smsmith * 13467754Smsmith * PARAMETERS: 13567754Smsmith * 13667754Smsmith * RETURN: Status 13767754Smsmith * 13867754Smsmith * DESCRIPTION: Installs the core subsystem address space handlers. 13967754Smsmith * 14077424Smsmith ******************************************************************************/ 14167754Smsmith 14267754SmsmithACPI_STATUS 14367754SmsmithAcpiEvInstallDefaultAddressSpaceHandlers ( 14467754Smsmith void) 14567754Smsmith{ 14667754Smsmith ACPI_STATUS Status; 14767754Smsmith 14867754Smsmith 14991116Smsmith ACPI_FUNCTION_TRACE ("EvInstallDefaultAddressSpaceHandlers"); 15067754Smsmith 15183174Smsmith 15267754Smsmith /* 15367754Smsmith * All address spaces (PCI Config, EC, SMBus) are scope dependent 15467754Smsmith * and registration must occur for a specific device. In the case 15567754Smsmith * system memory and IO address spaces there is currently no device 15667754Smsmith * associated with the address space. For these we use the root. 15767754Smsmith * We install the default PCI config space handler at the root so 15867754Smsmith * that this space is immediately available even though the we have 15967754Smsmith * not enumerated all the PCI Root Buses yet. This is to conform 16067754Smsmith * to the ACPI specification which states that the PCI config 16167754Smsmith * space must be always available -- even though we are nowhere 16267754Smsmith * near ready to find the PCI root buses at this point. 16367754Smsmith * 16487031Smsmith * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler 16587031Smsmith * has already been installed (via AcpiInstallAddressSpaceHandler) 16667754Smsmith */ 16791116Smsmith 16891116Smsmith Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode, 16977424Smsmith ACPI_ADR_SPACE_SYSTEM_MEMORY, 17067754Smsmith ACPI_DEFAULT_HANDLER, NULL, NULL); 17167754Smsmith if ((ACPI_FAILURE (Status)) && 17287031Smsmith (Status != AE_ALREADY_EXISTS)) 17367754Smsmith { 17467754Smsmith return_ACPI_STATUS (Status); 17567754Smsmith } 17667754Smsmith 17791116Smsmith Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode, 17877424Smsmith ACPI_ADR_SPACE_SYSTEM_IO, 17967754Smsmith ACPI_DEFAULT_HANDLER, NULL, NULL); 18067754Smsmith if ((ACPI_FAILURE (Status)) && 18187031Smsmith (Status != AE_ALREADY_EXISTS)) 18267754Smsmith { 18367754Smsmith return_ACPI_STATUS (Status); 18467754Smsmith } 18567754Smsmith 18691116Smsmith Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode, 18777424Smsmith ACPI_ADR_SPACE_PCI_CONFIG, 18867754Smsmith ACPI_DEFAULT_HANDLER, NULL, NULL); 18967754Smsmith if ((ACPI_FAILURE (Status)) && 19087031Smsmith (Status != AE_ALREADY_EXISTS)) 19167754Smsmith { 19267754Smsmith return_ACPI_STATUS (Status); 19367754Smsmith } 19467754Smsmith 19591116Smsmith Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode, 19691116Smsmith ACPI_ADR_SPACE_DATA_TABLE, 19791116Smsmith ACPI_DEFAULT_HANDLER, NULL, NULL); 19891116Smsmith if ((ACPI_FAILURE (Status)) && 19991116Smsmith (Status != AE_ALREADY_EXISTS)) 20091116Smsmith { 20191116Smsmith return_ACPI_STATUS (Status); 20291116Smsmith } 20367754Smsmith 20467754Smsmith return_ACPI_STATUS (AE_OK); 20567754Smsmith} 20667754Smsmith 20767754Smsmith 20877424Smsmith/******************************************************************************* 20967754Smsmith * 21067754Smsmith * FUNCTION: AcpiEvExecuteRegMethod 21167754Smsmith * 21267754Smsmith * PARAMETERS: RegionObj - Object structure 21367754Smsmith * Function - On (1) or Off (0) 21467754Smsmith * 21567754Smsmith * RETURN: Status 21667754Smsmith * 21767754Smsmith * DESCRIPTION: Execute _REG method for a region 21867754Smsmith * 21977424Smsmith ******************************************************************************/ 22067754Smsmith 22169450Smsmithstatic ACPI_STATUS 22267754SmsmithAcpiEvExecuteRegMethod ( 22367754Smsmith ACPI_OPERAND_OBJECT *RegionObj, 22467754Smsmith UINT32 Function) 22567754Smsmith{ 22667754Smsmith ACPI_OPERAND_OBJECT *Params[3]; 22787031Smsmith ACPI_OPERAND_OBJECT *RegionObj2; 22867754Smsmith ACPI_STATUS Status; 22967754Smsmith 23067754Smsmith 23191116Smsmith ACPI_FUNCTION_TRACE ("EvExecuteRegMethod"); 23267754Smsmith 23367754Smsmith 23487031Smsmith RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); 23587031Smsmith if (!RegionObj2) 23667754Smsmith { 23787031Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 23887031Smsmith } 23987031Smsmith 24087031Smsmith if (RegionObj2->Extra.Method_REG == NULL) 24187031Smsmith { 24267754Smsmith return_ACPI_STATUS (AE_OK); 24367754Smsmith } 24467754Smsmith 24567754Smsmith /* 24667754Smsmith * _REG method has two arguments 24767754Smsmith * Arg0: Integer: Operation region space ID 24867754Smsmith * Same value as RegionObj->Region.SpaceId 24967754Smsmith * Arg1: Integer: connection status 25067754Smsmith * 1 for connecting the handler, 25167754Smsmith * 0 for disconnecting the handler 25267754Smsmith * Passed as a parameter 25367754Smsmith */ 25484491Smsmith Params[0] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 25584491Smsmith if (!Params[0]) 25684491Smsmith { 25784491Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 25884491Smsmith } 25967754Smsmith 26084491Smsmith Params[1] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 26184491Smsmith if (!Params[1]) 26284491Smsmith { 26385756Smsmith Status = AE_NO_MEMORY; 26485756Smsmith goto Cleanup; 26584491Smsmith } 26667754Smsmith 26767754Smsmith /* 26867754Smsmith * Set up the parameter objects 26967754Smsmith */ 27084491Smsmith Params[0]->Integer.Value = RegionObj->Region.SpaceId; 27184491Smsmith Params[1]->Integer.Value = Function; 27285756Smsmith Params[2] = NULL; 27367754Smsmith 27467754Smsmith /* 27567754Smsmith * Execute the method, no return value 27667754Smsmith */ 27791116Smsmith ACPI_DEBUG_EXEC(AcpiUtDisplayInitPathname (RegionObj2->Extra.Method_REG, " [Method]")); 27887031Smsmith Status = AcpiNsEvaluateByHandle (RegionObj2->Extra.Method_REG, Params, NULL); 27984491Smsmith 28085756Smsmith AcpiUtRemoveReference (Params[1]); 28184491Smsmith 28285756SmsmithCleanup: 28384491Smsmith AcpiUtRemoveReference (Params[0]); 28484491Smsmith 28567754Smsmith return_ACPI_STATUS (Status); 28667754Smsmith} 28767754Smsmith 28867754Smsmith 28977424Smsmith/******************************************************************************* 29067754Smsmith * 29167754Smsmith * FUNCTION: AcpiEvAddressSpaceDispatch 29267754Smsmith * 29367754Smsmith * PARAMETERS: RegionObj - internal region object 29467754Smsmith * SpaceId - ID of the address space (0-255) 29567754Smsmith * Function - Read or Write operation 29667754Smsmith * Address - Where in the space to read or write 29787031Smsmith * BitWidth - Field width in bits (8, 16, 32, or 64) 29867754Smsmith * Value - Pointer to in or out value 29967754Smsmith * 30067754Smsmith * RETURN: Status 30167754Smsmith * 30267754Smsmith * DESCRIPTION: Dispatch an address space or operation region access to 30367754Smsmith * a previously installed handler. 30467754Smsmith * 30577424Smsmith ******************************************************************************/ 30667754Smsmith 30767754SmsmithACPI_STATUS 30867754SmsmithAcpiEvAddressSpaceDispatch ( 30967754Smsmith ACPI_OPERAND_OBJECT *RegionObj, 31067754Smsmith UINT32 Function, 31169450Smsmith ACPI_PHYSICAL_ADDRESS Address, 31267754Smsmith UINT32 BitWidth, 31387031Smsmith ACPI_INTEGER *Value) 31467754Smsmith{ 31567754Smsmith ACPI_STATUS Status; 31677424Smsmith ACPI_ADR_SPACE_HANDLER Handler; 31777424Smsmith ACPI_ADR_SPACE_SETUP RegionSetup; 31867754Smsmith ACPI_OPERAND_OBJECT *HandlerDesc; 31987031Smsmith ACPI_OPERAND_OBJECT *RegionObj2; 32067754Smsmith void *RegionContext = NULL; 32167754Smsmith 32267754Smsmith 32391116Smsmith ACPI_FUNCTION_TRACE ("EvAddressSpaceDispatch"); 32467754Smsmith 32567754Smsmith 32687031Smsmith RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); 32787031Smsmith if (!RegionObj2) 32887031Smsmith { 32987031Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 33087031Smsmith } 33187031Smsmith 33267754Smsmith /* 33377424Smsmith * Ensure that there is a handler associated with this region 33467754Smsmith */ 33567754Smsmith HandlerDesc = RegionObj->Region.AddrHandler; 33667754Smsmith if (!HandlerDesc) 33767754Smsmith { 33882367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "no handler for region(%p) [%s]\n", 33977424Smsmith RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); 34077424Smsmith 34187031Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 34267754Smsmith } 34367754Smsmith 34467754Smsmith /* 34577424Smsmith * It may be the case that the region has never been initialized 34677424Smsmith * Some types of regions require special init code 34767754Smsmith */ 34887031Smsmith if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)) 34967754Smsmith { 35067754Smsmith /* 35177424Smsmith * This region has not been initialized yet, do it 35267754Smsmith */ 35367754Smsmith RegionSetup = HandlerDesc->AddrHandler.Setup; 35467754Smsmith if (!RegionSetup) 35567754Smsmith { 35667754Smsmith /* 35767754Smsmith * Bad news, no init routine and not init'd 35867754Smsmith */ 35982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n", 36077424Smsmith RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); 36167754Smsmith return_ACPI_STATUS (AE_UNKNOWN_STATUS); 36267754Smsmith } 36367754Smsmith 36467754Smsmith /* 36567754Smsmith * We must exit the interpreter because the region setup will potentially 36667754Smsmith * execute control methods 36767754Smsmith */ 36877424Smsmith AcpiExExitInterpreter (); 36967754Smsmith 37067754Smsmith Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE, 37177424Smsmith HandlerDesc->AddrHandler.Context, &RegionContext); 37267754Smsmith 37367754Smsmith /* Re-enter the interpreter */ 37467754Smsmith 37577424Smsmith AcpiExEnterInterpreter (); 37667754Smsmith 37767754Smsmith /* 37867754Smsmith * Init routine may fail 37967754Smsmith */ 38067754Smsmith if (ACPI_FAILURE (Status)) 38167754Smsmith { 38282367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n", 38380062Smsmith AcpiFormatException (Status), 38477424Smsmith AcpiUtGetRegionName (RegionObj->Region.SpaceId))); 38587031Smsmith return_ACPI_STATUS (Status); 38667754Smsmith } 38767754Smsmith 38887031Smsmith RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE; 38967754Smsmith 39067754Smsmith /* 39167754Smsmith * Save the returned context for use in all accesses to 39267754Smsmith * this particular region. 39367754Smsmith */ 39487031Smsmith RegionObj2->Extra.RegionContext = RegionContext; 39567754Smsmith } 39667754Smsmith 39767754Smsmith /* 39867754Smsmith * We have everything we need, begin the process 39967754Smsmith */ 40067754Smsmith Handler = HandlerDesc->AddrHandler.Handler; 40167754Smsmith 40282367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 40385756Smsmith "Addrhandler %p (%p), Address %8.8X%8.8X\n", 40491116Smsmith &RegionObj->Region.AddrHandler->AddrHandler, Handler, 40591116Smsmith ACPI_HIDWORD (Address), ACPI_LODWORD (Address))); 40667754Smsmith 40791116Smsmith if (!(HandlerDesc->AddrHandler.Flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) 40867754Smsmith { 40967754Smsmith /* 41067754Smsmith * For handlers other than the default (supplied) handlers, we must 41167754Smsmith * exit the interpreter because the handler *might* block -- we don't 41267754Smsmith * know what it will do, so we can't hold the lock on the intepreter. 41367754Smsmith */ 41477424Smsmith AcpiExExitInterpreter(); 41567754Smsmith } 41667754Smsmith 41767754Smsmith /* 41867754Smsmith * Invoke the handler. 41967754Smsmith */ 42067754Smsmith Status = Handler (Function, Address, BitWidth, Value, 42167754Smsmith HandlerDesc->AddrHandler.Context, 42287031Smsmith RegionObj2->Extra.RegionContext); 42367754Smsmith 42467754Smsmith if (ACPI_FAILURE (Status)) 42567754Smsmith { 42691116Smsmith ACPI_REPORT_ERROR (("Handler for [%s] returned %s\n", 42791116Smsmith AcpiUtGetRegionName (RegionObj->Region.SpaceId), 42891116Smsmith AcpiFormatException (Status))); 42967754Smsmith } 43067754Smsmith 43191116Smsmith if (!(HandlerDesc->AddrHandler.Flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) 43267754Smsmith { 43383174Smsmith /* 43483174Smsmith * We just returned from a non-default handler, we must re-enter the 43583174Smsmith * interpreter 43683174Smsmith */ 43777424Smsmith AcpiExEnterInterpreter (); 43867754Smsmith } 43967754Smsmith 44067754Smsmith return_ACPI_STATUS (Status); 44167754Smsmith} 44267754Smsmith 44377424Smsmith/******************************************************************************* 44467754Smsmith * 44567754Smsmith * FUNCTION: AcpiEvDisassociateRegionFromHandler 44667754Smsmith * 44770243Smsmith * PARAMETERS: RegionObj - Region Object 44870243Smsmith * AcpiNsIsLocked - Namespace Region Already Locked? 44967754Smsmith * 45067754Smsmith * RETURN: None 45167754Smsmith * 45267754Smsmith * DESCRIPTION: Break the association between the handler and the region 45367754Smsmith * this is a two way association. 45467754Smsmith * 45567754Smsmith ******************************************************************************/ 45667754Smsmith 45767754Smsmithvoid 45867754SmsmithAcpiEvDisassociateRegionFromHandler( 45970243Smsmith ACPI_OPERAND_OBJECT *RegionObj, 46070243Smsmith BOOLEAN AcpiNsIsLocked) 46167754Smsmith{ 46267754Smsmith ACPI_OPERAND_OBJECT *HandlerObj; 46367754Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 46467754Smsmith ACPI_OPERAND_OBJECT **LastObjPtr; 46577424Smsmith ACPI_ADR_SPACE_SETUP RegionSetup; 46667754Smsmith void *RegionContext; 46787031Smsmith ACPI_OPERAND_OBJECT *RegionObj2; 46867754Smsmith ACPI_STATUS Status; 46967754Smsmith 47067754Smsmith 47191116Smsmith ACPI_FUNCTION_TRACE ("EvDisassociateRegionFromHandler"); 47267754Smsmith 47383174Smsmith 47487031Smsmith RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); 47587031Smsmith if (!RegionObj2) 47687031Smsmith { 47787031Smsmith return; 47887031Smsmith } 47987031Smsmith RegionContext = RegionObj2->Extra.RegionContext; 48067754Smsmith 48167754Smsmith /* 48267754Smsmith * Get the address handler from the region object 48367754Smsmith */ 48467754Smsmith HandlerObj = RegionObj->Region.AddrHandler; 48567754Smsmith if (!HandlerObj) 48667754Smsmith { 48767754Smsmith /* 48867754Smsmith * This region has no handler, all done 48967754Smsmith */ 49067754Smsmith return_VOID; 49167754Smsmith } 49267754Smsmith 49367754Smsmith 49467754Smsmith /* 49567754Smsmith * Find this region in the handler's list 49667754Smsmith */ 49767754Smsmith ObjDesc = HandlerObj->AddrHandler.RegionList; 49867754Smsmith LastObjPtr = &HandlerObj->AddrHandler.RegionList; 49967754Smsmith 50067754Smsmith while (ObjDesc) 50167754Smsmith { 50267754Smsmith /* 50367754Smsmith * See if this is the one 50467754Smsmith */ 50567754Smsmith if (ObjDesc == RegionObj) 50667754Smsmith { 50782367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 50882367Smsmith "Removing Region %p from address handler %p\n", 50967754Smsmith RegionObj, HandlerObj)); 51067754Smsmith /* 51167754Smsmith * This is it, remove it from the handler's list 51267754Smsmith */ 51367754Smsmith *LastObjPtr = ObjDesc->Region.Next; 51467754Smsmith ObjDesc->Region.Next = NULL; /* Must clear field */ 51567754Smsmith 51670243Smsmith if (AcpiNsIsLocked) 51770243Smsmith { 51891116Smsmith Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 51991116Smsmith if (ACPI_FAILURE (Status)) 52091116Smsmith { 52191116Smsmith return_VOID; 52291116Smsmith } 52370243Smsmith } 52470243Smsmith 52567754Smsmith /* 52667754Smsmith * Now stop region accesses by executing the _REG method 52767754Smsmith */ 52867754Smsmith AcpiEvExecuteRegMethod (RegionObj, 0); 52967754Smsmith 53070243Smsmith if (AcpiNsIsLocked) 53170243Smsmith { 53291116Smsmith Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 53391116Smsmith if (ACPI_FAILURE (Status)) 53491116Smsmith { 53591116Smsmith return_VOID; 53691116Smsmith } 53770243Smsmith } 53870243Smsmith 53967754Smsmith /* 54067754Smsmith * Call the setup handler with the deactivate notification 54167754Smsmith */ 54267754Smsmith RegionSetup = HandlerObj->AddrHandler.Setup; 54367754Smsmith Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE, 54477424Smsmith HandlerObj->AddrHandler.Context, &RegionContext); 54567754Smsmith 54667754Smsmith /* 54767754Smsmith * Init routine may fail, Just ignore errors 54867754Smsmith */ 54967754Smsmith if (ACPI_FAILURE (Status)) 55067754Smsmith { 55182367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region init, [%s]\n", 55280062Smsmith AcpiFormatException (Status), 55377424Smsmith AcpiUtGetRegionName (RegionObj->Region.SpaceId))); 55467754Smsmith } 55567754Smsmith 55687031Smsmith RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE); 55767754Smsmith 55867754Smsmith /* 55967754Smsmith * Remove handler reference in the region 56067754Smsmith * 56167754Smsmith * NOTE: this doesn't mean that the region goes away 56267754Smsmith * The region is just inaccessible as indicated to 56367754Smsmith * the _REG method 56467754Smsmith * 56567754Smsmith * If the region is on the handler's list 56667754Smsmith * this better be the region's handler 56767754Smsmith */ 56867754Smsmith RegionObj->Region.AddrHandler = NULL; 56967754Smsmith 57067754Smsmith return_VOID; 57167754Smsmith 57267754Smsmith } /* found the right handler */ 57367754Smsmith 57467754Smsmith /* 57567754Smsmith * Move through the linked list of handlers 57667754Smsmith */ 57767754Smsmith LastObjPtr = &ObjDesc->Region.Next; 57867754Smsmith ObjDesc = ObjDesc->Region.Next; 57967754Smsmith } 58067754Smsmith 58167754Smsmith /* 58267754Smsmith * If we get here, the region was not in the handler's region list 58367754Smsmith */ 58482367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 58582367Smsmith "Cannot remove region %p from address handler %p\n", 58667754Smsmith RegionObj, HandlerObj)); 58767754Smsmith 58867754Smsmith return_VOID; 58967754Smsmith} 59067754Smsmith 59167754Smsmith 59277424Smsmith/******************************************************************************* 59367754Smsmith * 59467754Smsmith * FUNCTION: AcpiEvAssociateRegionAndHandler 59567754Smsmith * 59667754Smsmith * PARAMETERS: HandlerObj - Handler Object 59767754Smsmith * RegionObj - Region Object 59870243Smsmith * AcpiNsIsLocked - Namespace Region Already Locked? 59967754Smsmith * 60067754Smsmith * RETURN: None 60167754Smsmith * 60267754Smsmith * DESCRIPTION: Create the association between the handler and the region 60367754Smsmith * this is a two way association. 60467754Smsmith * 60567754Smsmith ******************************************************************************/ 60667754Smsmith 60767754SmsmithACPI_STATUS 60867754SmsmithAcpiEvAssociateRegionAndHandler ( 60967754Smsmith ACPI_OPERAND_OBJECT *HandlerObj, 61067754Smsmith ACPI_OPERAND_OBJECT *RegionObj, 61167754Smsmith BOOLEAN AcpiNsIsLocked) 61267754Smsmith{ 61367754Smsmith ACPI_STATUS Status; 61467754Smsmith 61567754Smsmith 61691116Smsmith ACPI_FUNCTION_TRACE ("EvAssociateRegionAndHandler"); 61767754Smsmith 61867754Smsmith 61983174Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 62082367Smsmith "Adding Region %p to address handler %p [%s]\n", 62177424Smsmith RegionObj, HandlerObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId))); 62267754Smsmith 62367754Smsmith 62467754Smsmith /* 62587031Smsmith * Link this region to the front of the handler's list 62667754Smsmith */ 62767754Smsmith RegionObj->Region.Next = HandlerObj->AddrHandler.RegionList; 62867754Smsmith HandlerObj->AddrHandler.RegionList = RegionObj; 62967754Smsmith 63067754Smsmith /* 63187031Smsmith * Set the region's handler 63267754Smsmith */ 63367754Smsmith RegionObj->Region.AddrHandler = HandlerObj; 63467754Smsmith 63567754Smsmith /* 63687031Smsmith * Tell all users that this region is usable by running the _REG 63787031Smsmith * method 63867754Smsmith */ 63967754Smsmith if (AcpiNsIsLocked) 64067754Smsmith { 64177424Smsmith AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 64267754Smsmith } 64367754Smsmith 64467754Smsmith Status = AcpiEvExecuteRegMethod (RegionObj, 1); 64567754Smsmith 64667754Smsmith if (AcpiNsIsLocked) 64767754Smsmith { 64891116Smsmith (void) AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 64967754Smsmith } 65067754Smsmith 65167754Smsmith return_ACPI_STATUS (Status); 65267754Smsmith} 65367754Smsmith 65467754Smsmith 65577424Smsmith/******************************************************************************* 65667754Smsmith * 65767754Smsmith * FUNCTION: AcpiEvAddrHandlerHelper 65867754Smsmith * 65967754Smsmith * PARAMETERS: Handle - Node to be dumped 66067754Smsmith * Level - Nesting level of the handle 66167754Smsmith * Context - Passed into AcpiNsWalkNamespace 66267754Smsmith * 66387031Smsmith * DESCRIPTION: This routine installs an address handler into objects that are 66487031Smsmith * of type Region. 66567754Smsmith * 66667754Smsmith * If the Object is a Device, and the device has a handler of 66767754Smsmith * the same type then the search is terminated in that branch. 66867754Smsmith * 66967754Smsmith * This is because the existing handler is closer in proximity 67067754Smsmith * to any more regions than the one we are trying to install. 67167754Smsmith * 67277424Smsmith ******************************************************************************/ 67367754Smsmith 67467754SmsmithACPI_STATUS 67567754SmsmithAcpiEvAddrHandlerHelper ( 67667754Smsmith ACPI_HANDLE ObjHandle, 67767754Smsmith UINT32 Level, 67867754Smsmith void *Context, 67967754Smsmith void **ReturnValue) 68067754Smsmith{ 68167754Smsmith ACPI_OPERAND_OBJECT *HandlerObj; 68267754Smsmith ACPI_OPERAND_OBJECT *TmpObj; 68367754Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 68467754Smsmith ACPI_NAMESPACE_NODE *Node; 68567754Smsmith ACPI_STATUS Status; 68667754Smsmith 68767754Smsmith 68891116Smsmith ACPI_FUNCTION_NAME ("EvAddrHandlerHelper"); 68977424Smsmith 69077424Smsmith 69167754Smsmith HandlerObj = (ACPI_OPERAND_OBJECT *) Context; 69267754Smsmith 69367754Smsmith /* Parameter validation */ 69467754Smsmith 69567754Smsmith if (!HandlerObj) 69667754Smsmith { 69767754Smsmith return (AE_OK); 69867754Smsmith } 69967754Smsmith 70067754Smsmith /* Convert and validate the device handle */ 70167754Smsmith 70285756Smsmith Node = AcpiNsMapHandleToNode (ObjHandle); 70367754Smsmith if (!Node) 70467754Smsmith { 70567754Smsmith return (AE_BAD_PARAMETER); 70667754Smsmith } 70767754Smsmith 70867754Smsmith /* 70967754Smsmith * We only care about regions.and objects 71067754Smsmith * that can have address handlers 71167754Smsmith */ 71267754Smsmith if ((Node->Type != ACPI_TYPE_DEVICE) && 71367754Smsmith (Node->Type != ACPI_TYPE_REGION) && 71467754Smsmith (Node != AcpiGbl_RootNode)) 71567754Smsmith { 71667754Smsmith return (AE_OK); 71767754Smsmith } 71867754Smsmith 71967754Smsmith /* Check for an existing internal object */ 72067754Smsmith 72177424Smsmith ObjDesc = AcpiNsGetAttachedObject (Node); 72267754Smsmith if (!ObjDesc) 72367754Smsmith { 72467754Smsmith /* 72567754Smsmith * The object DNE, we don't care about it 72667754Smsmith */ 72767754Smsmith return (AE_OK); 72867754Smsmith } 72967754Smsmith 73067754Smsmith /* 73167754Smsmith * Devices are handled different than regions 73267754Smsmith */ 73391116Smsmith if (ObjDesc->Common.Type == ACPI_TYPE_DEVICE) 73467754Smsmith { 73567754Smsmith /* 73667754Smsmith * See if this guy has any handlers 73767754Smsmith */ 73867754Smsmith TmpObj = ObjDesc->Device.AddrHandler; 73967754Smsmith while (TmpObj) 74067754Smsmith { 74167754Smsmith /* 74267754Smsmith * Now let's see if it's for the same address space. 74367754Smsmith */ 74467754Smsmith if (TmpObj->AddrHandler.SpaceId == HandlerObj->AddrHandler.SpaceId) 74567754Smsmith { 74667754Smsmith /* 74767754Smsmith * It's for the same address space 74867754Smsmith */ 74982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 75082367Smsmith "Found handler for region [%s] in device %p(%p) handler %p\n", 75177424Smsmith AcpiUtGetRegionName (HandlerObj->AddrHandler.SpaceId), 75277424Smsmith ObjDesc, TmpObj, HandlerObj)); 75367754Smsmith 75467754Smsmith /* 75567754Smsmith * Since the object we found it on was a device, then it 75667754Smsmith * means that someone has already installed a handler for 75767754Smsmith * the branch of the namespace from this device on. Just 75867754Smsmith * bail out telling the walk routine to not traverse this 75967754Smsmith * branch. This preserves the scoping rule for handlers. 76067754Smsmith */ 76167754Smsmith return (AE_CTRL_DEPTH); 76267754Smsmith } 76367754Smsmith 76467754Smsmith /* 76567754Smsmith * Move through the linked list of handlers 76667754Smsmith */ 76767754Smsmith TmpObj = TmpObj->AddrHandler.Next; 76867754Smsmith } 76967754Smsmith 77067754Smsmith /* 77167754Smsmith * As long as the device didn't have a handler for this 77267754Smsmith * space we don't care about it. We just ignore it and 77367754Smsmith * proceed. 77467754Smsmith */ 77567754Smsmith return (AE_OK); 77667754Smsmith } 77767754Smsmith 77867754Smsmith /* 77967754Smsmith * Only here if it was a region 78067754Smsmith */ 78167754Smsmith if (ObjDesc->Region.SpaceId != HandlerObj->AddrHandler.SpaceId) 78267754Smsmith { 78367754Smsmith /* 78467754Smsmith * This region is for a different address space 78567754Smsmith * ignore it 78667754Smsmith */ 78767754Smsmith return (AE_OK); 78867754Smsmith } 78967754Smsmith 79067754Smsmith /* 79167754Smsmith * Now we have a region and it is for the handler's address 79267754Smsmith * space type. 79367754Smsmith * 79467754Smsmith * First disconnect region for any previous handler (if any) 79567754Smsmith */ 79670243Smsmith AcpiEvDisassociateRegionFromHandler (ObjDesc, FALSE); 79767754Smsmith 79867754Smsmith /* 79967754Smsmith * Then connect the region to the new handler 80067754Smsmith */ 80167754Smsmith Status = AcpiEvAssociateRegionAndHandler (HandlerObj, ObjDesc, FALSE); 80267754Smsmith 80367754Smsmith return (Status); 80467754Smsmith} 80567754Smsmith 80667754Smsmith 807