/****************************************************************************** * * Module Name: hwxface - Public ACPICA hardware interfaces * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2025, 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. * *****************************************************************************/ #define EXPORT_ACPI_INTERFACES #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #define _COMPONENT ACPI_HARDWARE ACPI_MODULE_NAME ("hwxface") /****************************************************************************** * * FUNCTION: AcpiReset * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Set reset register in memory or IO space. Note: Does not * support reset register in PCI config space, this must be * handled separately. * ******************************************************************************/ ACPI_STATUS AcpiReset ( void) { ACPI_GENERIC_ADDRESS *ResetReg; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiReset); ResetReg = &AcpiGbl_FADT.ResetRegister; /* Check if the reset register is supported */ if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || !ResetReg->Address) { return_ACPI_STATUS (AE_NOT_EXIST); } if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO) { /* * For I/O space, write directly to the OSL. This bypasses the port * validation mechanism, which may block a valid write to the reset * register. * * NOTE: * The ACPI spec requires the reset register width to be 8, so we * hardcode it here and ignore the FADT value. This maintains * compatibility with other ACPI implementations that have allowed * BIOS code with bad register width values to go unnoticed. */ Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address, AcpiGbl_FADT.ResetValue, ACPI_RESET_REGISTER_WIDTH); } else { /* Write the reset value to the reset register */ Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg); } return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiReset) /****************************************************************************** * * FUNCTION: AcpiRead * * PARAMETERS: Value - Where the value is returned * Reg - GAS register structure * * RETURN: Status * * DESCRIPTION: Read from either memory or IO space. * * LIMITATIONS: <These limitations also apply to AcpiWrite> * BitWidth must be exactly 8, 16, 32, or 64. * SpaceID must be SystemMemory or SystemIO. * BitOffset and AccessWidth are currently ignored, as there has * not been a need to implement these. * ******************************************************************************/ ACPI_STATUS AcpiRead ( UINT64 *ReturnValue, ACPI_GENERIC_ADDRESS *Reg) { ACPI_STATUS Status; ACPI_FUNCTION_NAME (AcpiRead); Status = AcpiHwRead (ReturnValue, Reg); return (Status); } ACPI_EXPORT_SYMBOL (AcpiRead) /****************************************************************************** * * FUNCTION: AcpiWrite * * PARAMETERS: Value - Value to be written * Reg - GAS register structure * * RETURN: Status * * DESCRIPTION: Write to either memory or IO space. * ******************************************************************************/ ACPI_STATUS AcpiWrite ( UINT64 Value, ACPI_GENERIC_ADDRESS *Reg) { ACPI_STATUS Status; ACPI_FUNCTION_NAME (AcpiWrite); Status = AcpiHwWrite (Value, Reg); return (Status); } ACPI_EXPORT_SYMBOL (AcpiWrite) #if (!ACPI_REDUCED_HARDWARE) /******************************************************************************* * * FUNCTION: AcpiReadBitRegister * * PARAMETERS: RegisterId - ID of ACPI Bit Register to access * ReturnValue - Value that was read from the register, * normalized to bit position zero. * * RETURN: Status and the value read from the specified Register. Value * returned is normalized to bit0 (is shifted all the way right) * * DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock. * * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and * PM2 Control. * * Note: The hardware lock is not required when reading the ACPI bit registers * since almost all of them are single bit and it does not matter that * the parent hardware register can be split across two physical * registers. The only multi-bit field is SLP_TYP in the PM1 control * register, but this field does not cross an 8-bit boundary (nor does * it make much sense to actually read this field.) * ******************************************************************************/ ACPI_STATUS AcpiReadBitRegister ( UINT32 RegisterId, UINT32 *ReturnValue) { ACPI_BIT_REGISTER_INFO *BitRegInfo; UINT32 RegisterValue; UINT32 Value; ACPI_STATUS Status; ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId); /* Get the info structure corresponding to the requested ACPI Register */ BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); if (!BitRegInfo) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Read the entire parent register */ Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, &RegisterValue); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Normalize the value that was read, mask off other bits */ Value = ((RegisterValue & BitRegInfo->AccessBitMask) >> BitRegInfo->BitPosition); ACPI_DEBUG_PRINT ((ACPI_DB_IO, "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n", RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value)); *ReturnValue = Value; return_ACPI_STATUS (AE_OK); } ACPI_EXPORT_SYMBOL (AcpiReadBitRegister) /******************************************************************************* * * FUNCTION: AcpiWriteBitRegister * * PARAMETERS: RegisterId - ID of ACPI Bit Register to access * Value - Value to write to the register, in bit * position zero. The bit is automatically * shifted to the correct position. * * RETURN: Status * * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock * since most operations require a read/modify/write sequence. * * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and * PM2 Control. * * Note that at this level, the fact that there may be actually two * hardware registers (A and B - and B may not exist) is abstracted. * ******************************************************************************/ ACPI_STATUS AcpiWriteBitRegister ( UINT32 RegisterId, UINT32 Value) { ACPI_BIT_REGISTER_INFO *BitRegInfo; ACPI_CPU_FLAGS LockFlags; UINT32 RegisterValue; ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId); /* Get the info structure corresponding to the requested ACPI Register */ BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); if (!BitRegInfo) { return_ACPI_STATUS (AE_BAD_PARAMETER); } LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock); /* * At this point, we know that the parent register is one of the * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control */ if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS) { /* * 1) Case for PM1 Enable, PM1 Control, and PM2 Control * * Perform a register read to preserve the bits that we are not * interested in */ Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, &RegisterValue); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } /* * Insert the input bit into the value that was just read * and write the register */ ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask, Value); Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister, RegisterValue); } else { /* * 2) Case for PM1 Status * * The Status register is different from the rest. Clear an event * by writing 1, writing 0 has no effect. So, the only relevant * information is the single bit we're interested in, all others * should be written as 0 so they will be left unchanged. */ RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value, BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); /* No need to write the register if value is all zeros */ if (RegisterValue) { Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS, RegisterValue); } } ACPI_DEBUG_PRINT ((ACPI_DB_IO, "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n", RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue)); UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister) #endif /* !ACPI_REDUCED_HARDWARE */ /******************************************************************************* * * FUNCTION: AcpiGetSleepTypeData * * PARAMETERS: SleepState - Numeric sleep state * *SleepTypeA - Where SLP_TYPa is returned * *SleepTypeB - Where SLP_TYPb is returned * * RETURN: Status * * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested * sleep state via the appropriate \_Sx object. * * The sleep state package returned from the corresponding \_Sx_ object * must contain at least one integer. * * March 2005: * Added support for a package that contains two integers. This * goes against the ACPI specification which defines this object as a * package with one encoded DWORD integer. However, existing practice * by many BIOS vendors is to return a package with 2 or more integer * elements, at least one per sleep type (A/B). * * January 2013: * Therefore, we must be prepared to accept a package with either a * single integer or multiple integers. * * The single integer DWORD format is as follows: * BYTE 0 - Value for the PM1A SLP_TYP register * BYTE 1 - Value for the PM1B SLP_TYP register * BYTE 2-3 - Reserved * * The dual integer format is as follows: * Integer 0 - Value for the PM1A SLP_TYP register * Integer 1 - Value for the PM1A SLP_TYP register * ******************************************************************************/ ACPI_STATUS AcpiGetSleepTypeData ( UINT8 SleepState, UINT8 *SleepTypeA, UINT8 *SleepTypeB) { ACPI_STATUS Status; ACPI_EVALUATE_INFO *Info; ACPI_OPERAND_OBJECT **Elements; ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData); /* Validate parameters */ if ((SleepState > ACPI_S_STATES_MAX) || !SleepTypeA || !SleepTypeB) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Allocate the evaluation information block */ Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); if (!Info) { return_ACPI_STATUS (AE_NO_MEMORY); } /* * Evaluate the \_Sx namespace object containing the register values * for this state */ Info->RelativePathname = AcpiGbl_SleepStateNames[SleepState]; Status = AcpiNsEvaluate (Info); if (ACPI_FAILURE (Status)) { if (Status == AE_NOT_FOUND) { /* The _Sx states are optional, ignore NOT_FOUND */ goto FinalCleanup; } goto WarningCleanup; } /* Must have a return object */ if (!Info->ReturnObject) { ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]", Info->RelativePathname)); Status = AE_AML_NO_RETURN_VALUE; goto WarningCleanup; } /* Return object must be of type Package */ if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) { ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package")); Status = AE_AML_OPERAND_TYPE; goto ReturnValueCleanup; } /* * Any warnings about the package length or the object types have * already been issued by the predefined name module -- there is no * need to repeat them here. */ Elements = Info->ReturnObject->Package.Elements; switch (Info->ReturnObject->Package.Count) { case 0: Status = AE_AML_PACKAGE_LIMIT; break; case 1: if (Elements[0]->Common.Type != ACPI_TYPE_INTEGER) { Status = AE_AML_OPERAND_TYPE; break; } /* A valid _Sx_ package with one integer */ *SleepTypeA = (UINT8) Elements[0]->Integer.Value; *SleepTypeB = (UINT8) (Elements[0]->Integer.Value >> 8); break; case 2: default: if ((Elements[0]->Common.Type != ACPI_TYPE_INTEGER) || (Elements[1]->Common.Type != ACPI_TYPE_INTEGER)) { Status = AE_AML_OPERAND_TYPE; break; } /* A valid _Sx_ package with two integers */ *SleepTypeA = (UINT8) Elements[0]->Integer.Value; *SleepTypeB = (UINT8) Elements[1]->Integer.Value; break; } ReturnValueCleanup: AcpiUtRemoveReference (Info->ReturnObject); WarningCleanup: if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "While evaluating Sleep State [%s]", Info->RelativePathname)); } FinalCleanup: ACPI_FREE (Info); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
