/****************************************************************************** * * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the * extended FADT-V5 sleep registers. * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include #include #define _COMPONENT ACPI_HARDWARE ACPI_MODULE_NAME ("hwesleep") /******************************************************************************* * * FUNCTION: AcpiHwExecuteSleepMethod * * PARAMETERS: MethodPathname - Pathname of method to execute * IntegerArgument - Argument to pass to the method * * RETURN: None * * DESCRIPTION: Execute a sleep/wake related method with one integer argument * and no return value. * ******************************************************************************/ void AcpiHwExecuteSleepMethod ( char *MethodPathname, UINT32 IntegerArgument) { ACPI_OBJECT_LIST ArgList; ACPI_OBJECT Arg; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (HwExecuteSleepMethod); /* One argument, IntegerArgument; No return value expected */ ArgList.Count = 1; ArgList.Pointer = &Arg; Arg.Type = ACPI_TYPE_INTEGER; Arg.Integer.Value = (UINT64) IntegerArgument; Status = AcpiEvaluateObject (NULL, MethodPathname, &ArgList, NULL); if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) { ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s", MethodPathname)); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiHwExtendedSleep * * PARAMETERS: SleepState - Which sleep state to enter * * RETURN: Status * * DESCRIPTION: Enter a system sleep state via the extended FADT sleep * registers (V5 FADT). * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ ACPI_STATUS AcpiHwExtendedSleep ( UINT8 SleepState) { ACPI_STATUS Status; UINT8 SleepControl; UINT64 SleepStatus; ACPI_FUNCTION_TRACE (HwExtendedSleep); /* Extended sleep registers must be valid */ if (!AcpiGbl_FADT.SleepControl.Address || !AcpiGbl_FADT.SleepStatus.Address) { return_ACPI_STATUS (AE_NOT_EXIST); } /* Clear wake status (WAK_STS) */ Status = AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } AcpiGbl_SystemAwakeAndRunning = FALSE; /* * Set the SLP_TYP and SLP_EN bits. * * Note: We only use the first value returned by the \_Sx method * (AcpiGbl_SleepTypeA) - As per ACPI specification. */ ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Entering sleep state [S%u]\n", SleepState)); SleepControl = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) & ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE; /* Flush caches, as per ACPI specification */ ACPI_FLUSH_CPU_CACHE (); Status = AcpiOsEnterSleep (SleepState, SleepControl, 0); if (Status == AE_CTRL_TERMINATE) { return_ACPI_STATUS (AE_OK); } if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiWrite ((UINT64) SleepControl, &AcpiGbl_FADT.SleepControl); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Wait for transition back to Working State */ do { Status = AcpiRead (&SleepStatus, &AcpiGbl_FADT.SleepStatus); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } while (!(((UINT8) SleepStatus) & ACPI_X_WAKE_STATUS)); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiHwExtendedWakePrep * * PARAMETERS: SleepState - Which sleep state we just exited * * RETURN: Status * * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after * a sleep. Called with interrupts ENABLED. * ******************************************************************************/ ACPI_STATUS AcpiHwExtendedWakePrep ( UINT8 SleepState) { UINT8 SleepTypeValue; ACPI_FUNCTION_TRACE (HwExtendedWakePrep); if (AcpiGbl_SleepTypeAS0 != ACPI_SLEEP_TYPE_INVALID) { SleepTypeValue = ((AcpiGbl_SleepTypeAS0 << ACPI_X_SLEEP_TYPE_POSITION) & ACPI_X_SLEEP_TYPE_MASK); (void) AcpiWrite ((UINT64) (SleepTypeValue | ACPI_X_SLEEP_ENABLE), &AcpiGbl_FADT.SleepControl); } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiHwExtendedWake * * PARAMETERS: SleepState - Which sleep state we just exited * * RETURN: Status * * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep * Called with interrupts ENABLED. * ******************************************************************************/ ACPI_STATUS AcpiHwExtendedWake ( UINT8 SleepState) { ACPI_FUNCTION_TRACE (HwExtendedWake); /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; /* Execute the wake methods */ AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING); AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState); /* * Some BIOS code assumes that WAK_STS will be cleared on resume * and use it to determine whether the system is rebooting or * resuming. Clear WAK_STS for compatibility. */ (void) AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus); AcpiGbl_SystemAwakeAndRunning = TRUE; AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING); return_ACPI_STATUS (AE_OK); }