/****************************************************************************** * * Module Name: exsystem - Interface to OS services * $Revision: 81 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2004, 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 __EXSYSTEM_C__ #include #include #include #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exsystem") /******************************************************************************* * * FUNCTION: AcpiExSystemWaitSemaphore * * PARAMETERS: Semaphore - OSD semaphore to wait on * Timeout - Max time to wait * * RETURN: Status * * DESCRIPTION: Implements a semaphore wait with a check to see if the * semaphore is available immediately. If it is not, the * interpreter is released. * ******************************************************************************/ ACPI_STATUS AcpiExSystemWaitSemaphore ( ACPI_HANDLE Semaphore, UINT16 Timeout) { ACPI_STATUS Status; ACPI_STATUS Status2; ACPI_FUNCTION_TRACE ("ExSystemWaitSemaphore"); Status = AcpiOsWaitSemaphore (Semaphore, 1, 0); if (ACPI_SUCCESS (Status)) { return_ACPI_STATUS (Status); } if (Status == AE_TIME) { /* We must wait, so unlock the interpreter */ AcpiExExitInterpreter (); Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout); ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "*** Thread awake after blocking, %s\n", AcpiFormatException (Status))); /* Reacquire the interpreter */ Status2 = AcpiExEnterInterpreter (); if (ACPI_FAILURE (Status2)) { /* Report fatal error, could not acquire interpreter */ return_ACPI_STATUS (Status2); } } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemDoStall * * PARAMETERS: HowLong - The amount of time to stall, * in microseconds * * RETURN: Status * * DESCRIPTION: Suspend running thread for specified amount of time. * Note: ACPI specification requires that Stall() does not * relinquish the processor, and delays longer than 100 usec * should use Sleep() instead. We allow stalls up to 255 usec * for compatibility with other interpreters and existing BIOSs. * ******************************************************************************/ ACPI_STATUS AcpiExSystemDoStall ( UINT32 HowLong) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_ENTRY (); if (HowLong > 255) /* 255 microseconds */ { /* * Longer than 255 usec, this is an error * * (ACPI specifies 100 usec as max, but this gives some slack in * order to support existing BIOSs) */ ACPI_REPORT_ERROR (("Stall: Time parameter is too large (%d)\n", HowLong)); Status = AE_AML_OPERAND_VALUE; } else { AcpiOsStall (HowLong); } return (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemDoSuspend * * PARAMETERS: HowLong - The amount of time to suspend, * in milliseconds * * RETURN: None * * DESCRIPTION: Suspend running thread for specified amount of time. * ******************************************************************************/ ACPI_STATUS AcpiExSystemDoSuspend ( ACPI_INTEGER HowLong) { ACPI_STATUS Status; ACPI_FUNCTION_ENTRY (); /* Since this thread will sleep, we must release the interpreter */ AcpiExExitInterpreter (); AcpiOsSleep (HowLong); /* And now we must get the interpreter again */ Status = AcpiExEnterInterpreter (); return (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemAcquireMutex * * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor * *ObjDesc - The object descriptor for this op * * RETURN: Status * * DESCRIPTION: Provides an access point to perform synchronization operations * within the AML. This function will cause a lock to be generated * for the Mutex pointed to by ObjDesc. * ******************************************************************************/ ACPI_STATUS AcpiExSystemAcquireMutex ( ACPI_OPERAND_OBJECT *TimeDesc, ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE_PTR ("ExSystemAcquireMutex", ObjDesc); if (!ObjDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * Support for the _GL_ Mutex object -- go get the global lock */ if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore) { Status = AcpiEvAcquireGlobalLock ((UINT16) TimeDesc->Integer.Value); return_ACPI_STATUS (Status); } Status = AcpiExSystemWaitSemaphore (ObjDesc->Mutex.Semaphore, (UINT16) TimeDesc->Integer.Value); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemReleaseMutex * * PARAMETERS: *ObjDesc - The object descriptor for this op * * RETURN: Status * * DESCRIPTION: Provides an access point to perform synchronization operations * within the AML. This operation is a request to release a * previously acquired Mutex. If the Mutex variable is set then * it will be decremented. * ******************************************************************************/ ACPI_STATUS AcpiExSystemReleaseMutex ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE ("ExSystemReleaseMutex"); if (!ObjDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * Support for the _GL_ Mutex object -- release the global lock */ if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore) { Status = AcpiEvReleaseGlobalLock (); return_ACPI_STATUS (Status); } Status = AcpiOsSignalSemaphore (ObjDesc->Mutex.Semaphore, 1); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemSignalEvent * * PARAMETERS: *ObjDesc - The object descriptor for this op * * RETURN: AE_OK * * DESCRIPTION: Provides an access point to perform synchronization operations * within the AML. * ******************************************************************************/ ACPI_STATUS AcpiExSystemSignalEvent ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE ("ExSystemSignalEvent"); if (ObjDesc) { Status = AcpiOsSignalSemaphore (ObjDesc->Event.Semaphore, 1); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemWaitEvent * * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor * *ObjDesc - The object descriptor for this op * * RETURN: Status * * DESCRIPTION: Provides an access point to perform synchronization operations * within the AML. This operation is a request to wait for an * event. * ******************************************************************************/ ACPI_STATUS AcpiExSystemWaitEvent ( ACPI_OPERAND_OBJECT *TimeDesc, ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE ("ExSystemWaitEvent"); if (ObjDesc) { Status = AcpiExSystemWaitSemaphore (ObjDesc->Event.Semaphore, (UINT16) TimeDesc->Integer.Value); } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExSystemResetEvent * * PARAMETERS: *ObjDesc - The object descriptor for this op * * RETURN: Status * * DESCRIPTION: Reset an event to a known state. * ******************************************************************************/ ACPI_STATUS AcpiExSystemResetEvent ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; void *TempSemaphore; ACPI_FUNCTION_ENTRY (); /* * We are going to simply delete the existing semaphore and * create a new one! */ Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore); if (ACPI_SUCCESS (Status)) { (void) AcpiOsDeleteSemaphore (ObjDesc->Event.Semaphore); ObjDesc->Event.Semaphore = TempSemaphore; } return (Status); }