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Diffstat (limited to 'sys/contrib/dev/acpica/dsmethod.c')
| -rw-r--r-- | sys/contrib/dev/acpica/dsmethod.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/dsmethod.c b/sys/contrib/dev/acpica/dsmethod.c new file mode 100644 index 0000000..9676539 --- /dev/null +++ b/sys/contrib/dev/acpica/dsmethod.c @@ -0,0 +1,649 @@ +/****************************************************************************** + * + * Module Name: dsmethod - Parser/Interpreter interface - control method parsing + * $Revision: 89 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, 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 __DSMETHOD_C__ + +#include "acpi.h" +#include "acparser.h" +#include "amlcode.h" +#include "acdispat.h" +#include "acinterp.h" +#include "acnamesp.h" + + +#define _COMPONENT ACPI_DISPATCHER + ACPI_MODULE_NAME ("dsmethod") + + +/******************************************************************************* + * + * FUNCTION: AcpiDsParseMethod + * + * PARAMETERS: ObjHandle - Node of the method + * Level - Current nesting level + * Context - Points to a method counter + * ReturnValue - Not used + * + * RETURN: Status + * + * DESCRIPTION: Call the parser and parse the AML that is + * associated with the method. + * + * MUTEX: Assumes parser is locked + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsParseMethod ( + ACPI_HANDLE ObjHandle) +{ + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_PARSE_OBJECT *Op; + ACPI_NAMESPACE_NODE *Node; + ACPI_OWNER_ID OwnerId; + ACPI_WALK_STATE *WalkState; + + + ACPI_FUNCTION_TRACE_PTR ("DsParseMethod", ObjHandle); + + + /* Parameter Validation */ + + if (!ObjHandle) + { + return_ACPI_STATUS (AE_NULL_ENTRY); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** NamedObj=%p\n", + ((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Ascii, ObjHandle)); + + /* Extract the method object from the method Node */ + + Node = (ACPI_NAMESPACE_NODE *) ObjHandle; + ObjDesc = AcpiNsGetAttachedObject (Node); + if (!ObjDesc) + { + return_ACPI_STATUS (AE_NULL_OBJECT); + } + + /* Create a mutex for the method if there is a concurrency limit */ + + if ((ObjDesc->Method.Concurrency != INFINITE_CONCURRENCY) && + (!ObjDesc->Method.Semaphore)) + { + Status = AcpiOsCreateSemaphore (ObjDesc->Method.Concurrency, + ObjDesc->Method.Concurrency, + &ObjDesc->Method.Semaphore); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + } + + /* + * Allocate a new parser op to be the root of the parsed + * method tree + */ + Op = AcpiPsAllocOp (AML_METHOD_OP); + if (!Op) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Init new op with the method name and pointer back to the Node */ + + AcpiPsSetName (Op, Node->Name.Integer); + Op->Common.Node = Node; + + /* + * Get a new OwnerId for objects created by this method. Namespace + * objects (such as Operation Regions) can be created during the + * first pass parse. + */ + OwnerId = AcpiUtAllocateOwnerId (ACPI_OWNER_TYPE_METHOD); + ObjDesc->Method.OwningId = OwnerId; + + /* Create and initialize a new walk state */ + + WalkState = AcpiDsCreateWalkState (OwnerId, NULL, NULL, NULL); + if (!WalkState) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + Status = AcpiDsInitAmlWalk (WalkState, Op, Node, ObjDesc->Method.AmlStart, + ObjDesc->Method.AmlLength, NULL, NULL, 1); + if (ACPI_FAILURE (Status)) + { + AcpiDsDeleteWalkState (WalkState); + return_ACPI_STATUS (Status); + } + + /* + * Parse the method, first pass + * + * The first pass load is where newly declared named objects are + * added into the namespace. Actual evaluation of + * the named objects (what would be called a "second + * pass") happens during the actual execution of the + * method so that operands to the named objects can + * take on dynamic run-time values. + */ + Status = AcpiPsParseAml (WalkState); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, + "**** [%4.4s] Parsed **** NamedObj=%p Op=%p\n", + ((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Ascii, ObjHandle, Op)); + + AcpiPsDeleteParseTree (Op); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsBeginMethodExecution + * + * PARAMETERS: MethodNode - Node of the method + * ObjDesc - The method object + * CallingMethodNode - Caller of this method (if non-null) + * + * RETURN: Status + * + * DESCRIPTION: Prepare a method for execution. Parses the method if necessary, + * increments the thread count, and waits at the method semaphore + * for clearance to execute. + * + * MUTEX: Locks/unlocks parser. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsBeginMethodExecution ( + ACPI_NAMESPACE_NODE *MethodNode, + ACPI_OPERAND_OBJECT *ObjDesc, + ACPI_NAMESPACE_NODE *CallingMethodNode) +{ + ACPI_STATUS Status = AE_OK; + + + ACPI_FUNCTION_TRACE_PTR ("DsBeginMethodExecution", MethodNode); + + + if (!MethodNode) + { + return_ACPI_STATUS (AE_NULL_ENTRY); + } + + /* + * If there is a concurrency limit on this method, we need to + * obtain a unit from the method semaphore. + */ + if (ObjDesc->Method.Semaphore) + { + /* + * Allow recursive method calls, up to the reentrancy/concurrency + * limit imposed by the SERIALIZED rule and the SyncLevel method + * parameter. + * + * The point of this code is to avoid permanently blocking a + * thread that is making recursive method calls. + */ + if (MethodNode == CallingMethodNode) + { + if (ObjDesc->Method.ThreadCount >= ObjDesc->Method.Concurrency) + { + return_ACPI_STATUS (AE_AML_METHOD_LIMIT); + } + } + + /* + * Get a unit from the method semaphore. This releases the + * interpreter if we block + */ + Status = AcpiExSystemWaitSemaphore (ObjDesc->Method.Semaphore, + ACPI_WAIT_FOREVER); + } + + /* + * Increment the method parse tree thread count since it has been + * reentered one more time (even if it is the same thread) + */ + ObjDesc->Method.ThreadCount++; + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsCallControlMethod + * + * PARAMETERS: WalkState - Current state of the walk + * Op - Current Op to be walked + * + * RETURN: Status + * + * DESCRIPTION: Transfer execution to a called control method + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsCallControlMethod ( + ACPI_THREAD_STATE *Thread, + ACPI_WALK_STATE *ThisWalkState, + ACPI_PARSE_OBJECT *Op) +{ + ACPI_STATUS Status; + ACPI_NAMESPACE_NODE *MethodNode; + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_WALK_STATE *NextWalkState; + UINT32 i; + + + ACPI_FUNCTION_TRACE_PTR ("DsCallControlMethod", ThisWalkState); + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n", + ThisWalkState->PrevOp, ThisWalkState)); + + /* + * Get the namespace entry for the control method we are about to call + */ + MethodNode = ThisWalkState->MethodCallNode; + if (!MethodNode) + { + return_ACPI_STATUS (AE_NULL_ENTRY); + } + + ObjDesc = AcpiNsGetAttachedObject (MethodNode); + if (!ObjDesc) + { + return_ACPI_STATUS (AE_NULL_OBJECT); + } + + /* Init for new method, wait on concurrency semaphore */ + + Status = AcpiDsBeginMethodExecution (MethodNode, ObjDesc, + ThisWalkState->MethodNode); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* 1) Parse: Create a new walk state for the preempting walk */ + + NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwningId, + Op, ObjDesc, NULL); + if (!NextWalkState) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Create and init a Root Node */ + + Op = AcpiPsCreateScopeOp (); + if (!Op) + { + Status = AE_NO_MEMORY; + goto Cleanup; + } + + Status = AcpiDsInitAmlWalk (NextWalkState, Op, MethodNode, + ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength, + NULL, NULL, 1); + if (ACPI_FAILURE (Status)) + { + AcpiDsDeleteWalkState (NextWalkState); + goto Cleanup; + } + + /* Begin AML parse */ + + Status = AcpiPsParseAml (NextWalkState); + AcpiPsDeleteParseTree (Op); + + /* 2) Execute: Create a new state for the preempting walk */ + + NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwningId, + NULL, ObjDesc, Thread); + if (!NextWalkState) + { + Status = AE_NO_MEMORY; + goto Cleanup; + } + + /* + * The resolved arguments were put on the previous walk state's operand + * stack. Operands on the previous walk state stack always + * start at index 0. + * Null terminate the list of arguments + */ + ThisWalkState->Operands [ThisWalkState->NumOperands] = NULL; + + Status = AcpiDsInitAmlWalk (NextWalkState, NULL, MethodNode, + ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength, + &ThisWalkState->Operands[0], NULL, 3); + if (ACPI_FAILURE (Status)) + { + goto Cleanup; + } + + /* + * Delete the operands on the previous walkstate operand stack + * (they were copied to new objects) + */ + for (i = 0; i < ObjDesc->Method.ParamCount; i++) + { + AcpiUtRemoveReference (ThisWalkState->Operands [i]); + ThisWalkState->Operands [i] = NULL; + } + + /* Clear the operand stack */ + + ThisWalkState->NumOperands = 0; + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "Starting nested execution, newstate=%p\n", NextWalkState)); + + return_ACPI_STATUS (AE_OK); + + + /* On error, we must delete the new walk state */ + +Cleanup: + (void) AcpiDsTerminateControlMethod (NextWalkState); + AcpiDsDeleteWalkState (NextWalkState); + return_ACPI_STATUS (Status); + +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsRestartControlMethod + * + * PARAMETERS: WalkState - State of the method when it was preempted + * Op - Pointer to new current op + * + * RETURN: Status + * + * DESCRIPTION: Restart a method that was preempted + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsRestartControlMethod ( + ACPI_WALK_STATE *WalkState, + ACPI_OPERAND_OBJECT *ReturnDesc) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE_PTR ("DsRestartControlMethod", WalkState); + + + if (ReturnDesc) + { + if (WalkState->ReturnUsed) + { + /* + * Get the return value (if any) from the previous method. + * NULL if no return value + */ + Status = AcpiDsResultPush (ReturnDesc, WalkState); + if (ACPI_FAILURE (Status)) + { + AcpiUtRemoveReference (ReturnDesc); + return_ACPI_STATUS (Status); + } + } + else + { + /* + * Delete the return value if it will not be used by the + * calling method + */ + AcpiUtRemoveReference (ReturnDesc); + } + } + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "Method=%p Return=%p ReturnUsed?=%X ResStack=%p State=%p\n", + WalkState->MethodCallOp, ReturnDesc, WalkState->ReturnUsed, + WalkState->Results, WalkState)); + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsTerminateControlMethod + * + * PARAMETERS: WalkState - State of the method + * + * RETURN: Status + * + * DESCRIPTION: Terminate a control method. Delete everything that the method + * created, delete all locals and arguments, and delete the parse + * tree if requested. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsTerminateControlMethod ( + ACPI_WALK_STATE *WalkState) +{ + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_NAMESPACE_NODE *MethodNode; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE_PTR ("DsTerminateControlMethod", WalkState); + + + if (!WalkState) + { + return (AE_BAD_PARAMETER); + } + + /* The current method object was saved in the walk state */ + + ObjDesc = WalkState->MethodDesc; + if (!ObjDesc) + { + return_ACPI_STATUS (AE_OK); + } + + /* Delete all arguments and locals */ + + AcpiDsMethodDataDeleteAll (WalkState); + + /* + * Lock the parser while we terminate this method. + * If this is the last thread executing the method, + * we have additional cleanup to perform + */ + Status = AcpiUtAcquireMutex (ACPI_MTX_PARSER); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Signal completion of the execution of this method if necessary */ + + if (WalkState->MethodDesc->Method.Semaphore) + { + Status = AcpiOsSignalSemaphore ( + WalkState->MethodDesc->Method.Semaphore, 1); + if (ACPI_FAILURE (Status)) + { + ACPI_REPORT_ERROR (("Could not signal method semaphore\n")); + Status = AE_OK; + + /* Ignore error and continue cleanup */ + } + } + + /* Decrement the thread count on the method parse tree */ + + WalkState->MethodDesc->Method.ThreadCount--; + if (!WalkState->MethodDesc->Method.ThreadCount) + { + /* + * There are no more threads executing this method. Perform + * additional cleanup. + * + * The method Node is stored in the walk state + */ + MethodNode = WalkState->MethodNode; + + /* + * Delete any namespace entries created immediately underneath + * the method + */ + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + if (MethodNode->Child) + { + AcpiNsDeleteNamespaceSubtree (MethodNode); + } + + /* + * Delete any namespace entries created anywhere else within + * the namespace + */ + AcpiNsDeleteNamespaceByOwner (WalkState->MethodDesc->Method.OwningId); + Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + } + + Status = AcpiUtReleaseMutex (ACPI_MTX_PARSER); + return_ACPI_STATUS (Status); +} + + |
