hwxface.c revision 4cf02d40c1d09ad2a5a49f040d1c9fa191244416
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Module Name: hwxface - Public ACPICA hardware interfaces
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers *****************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 1. Copyright Notice
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * All rights reserved.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 2. License
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 2.1. This is your license from Intel Corp. under its intellectual property
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * rights. You may have additional license terms from the party that provided
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * you this software, covering your right to use that party's intellectual
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * property rights.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * copy of the source code appearing in this file ("Covered Code") an
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * irrevocable, perpetual, worldwide license under Intel's copyrights in the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * base code distributed originally by Intel ("Original Intel Code") to copy,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * make derivatives, distribute, use and display any portion of the Covered
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Code in any form, with the right to sublicense such rights; and
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * license (with the right to sublicense), under only those claims of Intel
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * patents that are infringed by the Original Intel Code, to make, use, sell,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * offer to sell, and import the Covered Code and derivative works thereof
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * solely to the minimum extent necessary to exercise the above copyright
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * license, and in no event shall the patent license extend to any additions
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * to or modifications of the Original Intel Code. No other license or right
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * is granted directly or by implication, estoppel or otherwise;
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * The above copyright and patent license is granted only if the following
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * conditions are met:
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3. Conditions
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3.1. Redistribution of Source with Rights to Further Distribute Source.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Redistribution of source code of any substantial portion of the Covered
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Code or modification with rights to further distribute source must include
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * the above Copyright Notice, the above License, this list of Conditions,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * and the following Disclaimer and Export Compliance provision. In addition,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Licensee must cause all Covered Code to which Licensee contributes to
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * contain a file documenting the changes Licensee made to create that Covered
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Code and the date of any change. Licensee must include in that file the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * documentation of any changes made by any predecessor Licensee. Licensee
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * must include a prominent statement that the modification is derived,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * directly or indirectly, from Original Intel Code.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Redistribution of source code of any substantial portion of the Covered
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Code or modification without rights to further distribute source must
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * include the following Disclaimer and Export Compliance provision in the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * documentation and/or other materials provided with distribution. In
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * addition, Licensee may not authorize further sublicense of source of any
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * portion of the Covered Code, and must include terms to the effect that the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * license from Licensee to its licensee is limited to the intellectual
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * property embodied in the software Licensee provides to its licensee, and
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * not to intellectual property embodied in modifications its licensee may
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3.3. Redistribution of Executable. Redistribution in executable form of any
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * substantial portion of the Covered Code or modification must reproduce the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * above Copyright Notice, and the following Disclaimer and Export Compliance
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * provision in the documentation and/or other materials provided with the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * distribution.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3.4. Intel retains all right, title, and interest in and to the Original
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Intel Code.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 3.5. Neither the name Intel nor any other trademark owned or controlled by
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Intel shall be used in advertising or otherwise to promote the sale, use or
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * other dealings in products derived from or relating to the Covered Code
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * without prior written authorization from Intel.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 4. Disclaimer and Export Compliance
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARTICULAR PURPOSE.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * LIMITED REMEDY.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 4.3. Licensee shall not export, either directly or indirectly, any of this
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * software or system incorporating such software without first obtaining any
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * required license or other approval from the U. S. Department of Commerce or
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * any other agency or department of the United States Government. In the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * event Licensee exports any such software from the United States or
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * re-exports any such software from a foreign destination, Licensee shall
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * ensure that the distribution and export/re-export of the software is in
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * compliance with all laws, regulations, orders, or other restrictions of the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * U.S. Export Administration Regulations. Licensee agrees that neither it nor
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * any of its subsidiaries will export/re-export any technical data, process,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * software, or service, directly or indirectly, to any country for which the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * United States government or any agency thereof requires an export license,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * other governmental approval, or letter of assurance, without first obtaining
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * such license, approval or letter.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers *****************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiReset
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: None
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: Set reset register in memory or IO space. Note: Does not
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * support reset register in PCI config space, this must be
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * handled separately.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Check if the reset register is supported */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO)
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra * For I/O space, write directly to the OSL. This bypasses the port
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra * validation mechanism, which may block a valid write to the reset
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra /* Write the reset value to the reset register */
4cf02d40c1d09ad2a5a49f040d1c9fa191244416Saurabh Misra Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiRead
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: Value - Where the value is returned
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Reg - GAS register structure
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: Read from either memory or IO space.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Must have a valid pointer to a GAS structure, and a non-zero address
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Get a local copy of the address. Handles possible alignment issues */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Supported widths are 8/16/32 */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers if ((Width != 8) && (Width != 16) && (Width != 32))
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Initialize entire 32-bit return value to zero */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Two address spaces supported: Memory or IO. PCI_Config is
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * not supported here because the GAS structure is insufficient
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address, Value, Width);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiWrite
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: Value - To be written
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Reg - GAS register structure
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: Write to either memory or IO space.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Must have a valid pointer to a GAS structure, and a non-zero address
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Get a local copy of the address. Handles possible alignment issues */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Supported widths are 8/16/32 */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers if ((Width != 8) && (Width != 16) && (Width != 32))
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Two address spaces supported: Memory or IO.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PCI_Config is not supported here because the GAS struct is insufficient
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/*******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiReadBitRegister
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: RegisterId - ID of ACPI Bit Register to access
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * ReturnValue - Value that was read from the register,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * normalized to bit position zero.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status and the value read from the specified Register. Value
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * returned is normalized to bit0 (is shifted all the way right)
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PM2 Control.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Note: The hardware lock is not required when reading the ACPI bit registers
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * since almost all of them are single bit and it does not matter that
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * the parent hardware register can be split across two physical
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * registers. The only multi-bit field is SLP_TYP in the PM1 control
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * register, but this field does not cross an 8-bit boundary (nor does
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * it make much sense to actually read this field.)
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Get the info structure corresponding to the requested ACPI Register */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Read the entire parent register */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Normalize the value that was read, mask off other bits */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Value = ((RegisterValue & BitRegInfo->AccessBitMask)
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/*******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiWriteBitRegister
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: RegisterId - ID of ACPI Bit Register to access
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Value - Value to write to the register, in bit
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * position zero. The bit is automaticallly
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * shifted to the correct position.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * since most operations require a read/modify/write sequence.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PM2 Control.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Note that at this level, the fact that there may be actually two
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * hardware registers (A and B - and B may not exist) is abstracted.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Get the info structure corresponding to the requested ACPI Register */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * At this point, we know that the parent register is one of the
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS)
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 1) Case for PM1 Enable, PM1 Control, and PM2 Control
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Perform a register read to preserve the bits that we are not
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * interested in
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * Insert the input bit into the value that was just read
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * and write the register
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * 2) Case for PM1 Status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * The Status register is different from the rest. Clear an event
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * by writing 1, writing 0 has no effect. So, the only relevant
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * information is the single bit we're interested in, all others
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * should be written as 0 so they will be left unchanged.
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* No need to write the register if value is all zeros */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers/*******************************************************************************
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * FUNCTION: AcpiGetSleepTypeData
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * PARAMETERS: SleepState - Numeric sleep state
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * *SleepTypeA - Where SLP_TYPa is returned
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * *SleepTypeB - Where SLP_TYPb is returned
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * RETURN: Status - ACPI status
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ******************************************************************************/
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Validate parameters */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Allocate the evaluation information block */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers Info->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]);
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Evaluate the namespace object containing the values for this state */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "%s while evaluating SleepState [%s]\n",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Must have a return object */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* It must be of type Package */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers else if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package"));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * The package must have at least two elements. NOTE (March 2005): This
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * goes against the current ACPI spec which defines this object as a
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * package with one encoded DWORD element. However, existing practice
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * by BIOS vendors seems to be to have 2 or more elements, at least
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers * one per sleep type (A/B).
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "Sleep State return package does not have at least two elements"));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* The first two elements must both be of type Integer */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers else if (((Info->ReturnObject->Package.Elements[0])->Common.Type
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers ((Info->ReturnObject->Package.Elements[1])->Common.Type
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "Sleep State return package elements are not both Integers "
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]),
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1])));
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers /* Valid _Sx_ package size, type, and value */
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers (Info->ReturnObject->Package.Elements[0])->Integer.Value;
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers (Info->ReturnObject->Package.Elements[1])->Integer.Value;
aa2aa9a662539940ddbc8610da5a3a874ebd7503Dana Myers "While evaluating SleepState [%s], bad Sleep object %p type %s",