vendor/acpica/20120215

10 files changed, 4276 insertions, 0 deletions

diff --git a/source/components/hardware/hwacpi.c b/source/components/hardware/hwacpi.c
new file mode 100644
index 000000000000..d9f16ef9d767
--- /dev/null
+++ b/source/components/hardware/hwacpi.c
@@ -0,0 +1,209 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#define __HWACPI_C__
+
+#include "acpi.h"
+#include "accommon.h"
+
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwacpi")
+
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwSetMode
+ *
+ * PARAMETERS:  Mode            - SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transitions the system into the requested mode.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwSetMode (
+    UINT32                  Mode)
+{
+
+    ACPI_STATUS             Status;
+    UINT32                  Retry;
+
+
+    ACPI_FUNCTION_TRACE (HwSetMode);
+
+    /*
+     * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+     * system does not support mode transition.
+     */
+    if (!AcpiGbl_FADT.SmiCommand)
+    {
+        ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed"));
+        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+    }
+
+    /*
+     * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
+     * in FADT: If it is zero, enabling or disabling is not supported.
+     * As old systems may have used zero for mode transition,
+     * we make sure both the numbers are zero to determine these
+     * transitions are not supported.
+     */
+    if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable)
+    {
+        ACPI_ERROR ((AE_INFO,
+            "No ACPI mode transition supported in this system "
+            "(enable/disable both zero)"));
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    switch (Mode)
+    {
+    case ACPI_SYS_MODE_ACPI:
+
+        /* BIOS should have disabled ALL fixed and GP events */
+
+        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
+                        (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
+        break;
+
+    case ACPI_SYS_MODE_LEGACY:
+
+        /*
+         * BIOS should clear all fixed status bits and restore fixed event
+         * enable bits to default
+         */
+        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
+                    (UINT32) AcpiGbl_FADT.AcpiDisable, 8);
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                    "Attempting to enable Legacy (non-ACPI) mode\n"));
+        break;
+
+    default:
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Could not write ACPI mode change"));
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * Some hardware takes a LONG time to switch modes. Give them 3 sec to
+     * do so, but allow faster systems to proceed more quickly.
+     */
+    Retry = 3000;
+    while (Retry)
+    {
+        if (AcpiHwGetMode() == Mode)
+        {
+            ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n",
+                Mode));
+            return_ACPI_STATUS (AE_OK);
+        }
+        AcpiOsStall(1000);
+        Retry--;
+    }
+
+    ACPI_ERROR ((AE_INFO, "Hardware did not change modes"));
+    return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetMode
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * DESCRIPTION: Return current operating state of system.  Determined by
+ *              querying the SCI_EN bit.
+ *
+ ******************************************************************************/
+
+UINT32
+AcpiHwGetMode (
+    void)
+{
+    ACPI_STATUS             Status;
+    UINT32                  Value;
+
+
+    ACPI_FUNCTION_TRACE (HwGetMode);
+
+
+    /*
+     * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+     * system does not support mode transition.
+     */
+    if (!AcpiGbl_FADT.SmiCommand)
+    {
+        return_UINT32 (ACPI_SYS_MODE_ACPI);
+    }
+
+    Status = AcpiReadBitRegister (ACPI_BITREG_SCI_ENABLE, &Value);
+    if (ACPI_FAILURE (Status))
+    {
+        return_UINT32 (ACPI_SYS_MODE_LEGACY);
+    }
+
+    if (Value)
+    {
+        return_UINT32 (ACPI_SYS_MODE_ACPI);
+    }
+    else
+    {
+        return_UINT32 (ACPI_SYS_MODE_LEGACY);
+    }
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/source/components/hardware/hwesleep.c b/source/components/hardware/hwesleep.c
new file mode 100644
index 000000000000..e95647e5cd19
--- /dev/null
+++ b/source/components/hardware/hwesleep.c
@@ -0,0 +1,263 @@
+/******************************************************************************
+ *
+ * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ *                    extended FADT-V5 sleep registers.
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwesleep")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwExecuteSleepMethod
+ *
+ * PARAMETERS:  MethodName          - 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                    *MethodName,
+    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, MethodName, &ArgList, NULL);
+    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s",
+            MethodName));
+    }
+
+    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                   SleepTypeValue;
+    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 (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    AcpiGbl_SystemAwakeAndRunning = FALSE;
+
+    /* Execute the _GTS method (Going To Sleep) */
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__GTS, SleepState);
+
+    /* Flush caches, as per ACPI specification */
+
+    ACPI_FLUSH_CPU_CACHE ();
+
+    /*
+     * 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));
+
+    SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
+        ACPI_X_SLEEP_TYPE_MASK);
+
+    Status = AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE),
+        &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)
+{
+    ACPI_STATUS             Status;
+    UINT8                   SleepTypeValue;
+
+
+    ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
+
+
+    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
+                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
+    if (ACPI_SUCCESS (Status))
+    {
+        SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
+            ACPI_X_SLEEP_TYPE_MASK);
+
+        (void) AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE),
+            &AcpiGbl_FADT.SleepControl);
+    }
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__BFS, SleepState);
+    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_NAME__SST, ACPI_SST_WAKING);
+    AcpiHwExecuteSleepMethod (METHOD_NAME__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 (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
+    AcpiGbl_SystemAwakeAndRunning = TRUE;
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WORKING);
+    return_ACPI_STATUS (AE_OK);
+}
diff --git a/source/components/hardware/hwgpe.c b/source/components/hardware/hwgpe.c
new file mode 100644
index 000000000000..c94f17be260e
--- /dev/null
+++ b/source/components/hardware/hwgpe.c
@@ -0,0 +1,543 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwgpe - Low level GPE enable/disable/clear functions
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwgpe")
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+
+/* Local prototypes */
+
+static ACPI_STATUS
+AcpiHwEnableWakeupGpeBlock (
+    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
+    ACPI_GPE_BLOCK_INFO     *GpeBlock,
+    void                    *Context);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetGpeRegisterBit
+ *
+ * PARAMETERS:  GpeEventInfo        - Info block for the GPE
+ *              GpeRegisterInfo     - Info block for the GPE register
+ *
+ * RETURN:      Register mask with a one in the GPE bit position
+ *
+ * DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
+ *              correct position for the input GPE.
+ *
+ ******************************************************************************/
+
+UINT32
+AcpiHwGetGpeRegisterBit (
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
+    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo)
+{
+
+    return ((UINT32) 1 <<
+        (GpeEventInfo->GpeNumber - GpeRegisterInfo->BaseGpeNumber));
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwLowSetGpe
+ *
+ * PARAMETERS:  GpeEventInfo        - Info block for the GPE to be disabled
+ *              Action              - Enable or disable
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable or disable a single GPE in the parent enable register.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwLowSetGpe (
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
+    UINT32                  Action)
+{
+    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
+    ACPI_STATUS             Status;
+    UINT32                  EnableMask;
+    UINT32                  RegisterBit;
+
+
+    ACPI_FUNCTION_ENTRY ();
+
+
+    /* Get the info block for the entire GPE register */
+
+    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
+    if (!GpeRegisterInfo)
+    {
+        return (AE_NOT_EXIST);
+    }
+
+    /* Get current value of the enable register that contains this GPE */
+
+    Status = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /* Set or clear just the bit that corresponds to this GPE */
+
+    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
+    switch (Action)
+    {
+    case ACPI_GPE_CONDITIONAL_ENABLE:
+
+        /* Only enable if the EnableForRun bit is set */
+
+        if (!(RegisterBit & GpeRegisterInfo->EnableForRun))
+        {
+            return (AE_BAD_PARAMETER);
+        }
+
+        /*lint -fallthrough */
+
+    case ACPI_GPE_ENABLE:
+        ACPI_SET_BIT (EnableMask, RegisterBit);
+        break;
+
+    case ACPI_GPE_DISABLE:
+        ACPI_CLEAR_BIT (EnableMask, RegisterBit);
+        break;
+
+    default:
+        ACPI_ERROR ((AE_INFO, "Invalid GPE Action, %u\n", Action));
+        return (AE_BAD_PARAMETER);
+    }
+
+    /* Write the updated enable mask */
+
+    Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
+    return (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwClearGpe
+ *
+ * PARAMETERS:  GpeEventInfo        - Info block for the GPE to be cleared
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear the status bit for a single GPE.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwClearGpe (
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo)
+{
+    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
+    ACPI_STATUS             Status;
+    UINT32                  RegisterBit;
+
+
+    ACPI_FUNCTION_ENTRY ();
+
+    /* Get the info block for the entire GPE register */
+
+    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
+    if (!GpeRegisterInfo)
+    {
+        return (AE_NOT_EXIST);
+    }
+
+    /*
+     * Write a one to the appropriate bit in the status register to
+     * clear this GPE.
+     */
+    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
+
+    Status = AcpiHwWrite (RegisterBit,
+                    &GpeRegisterInfo->StatusAddress);
+
+    return (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetGpeStatus
+ *
+ * PARAMETERS:  GpeEventInfo        - Info block for the GPE to queried
+ *              EventStatus         - Where the GPE status is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the status of a single GPE.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwGetGpeStatus (
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
+    ACPI_EVENT_STATUS       *EventStatus)
+{
+    UINT32                  InByte;
+    UINT32                  RegisterBit;
+    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
+    ACPI_EVENT_STATUS       LocalEventStatus = 0;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_ENTRY ();
+
+
+    if (!EventStatus)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /* Get the info block for the entire GPE register */
+
+    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
+
+    /* Get the register bitmask for this GPE */
+
+    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
+
+    /* GPE currently enabled? (enabled for runtime?) */
+
+    if (RegisterBit & GpeRegisterInfo->EnableForRun)
+    {
+        LocalEventStatus |= ACPI_EVENT_FLAG_ENABLED;
+    }
+
+    /* GPE enabled for wake? */
+
+    if (RegisterBit & GpeRegisterInfo->EnableForWake)
+    {
+        LocalEventStatus |= ACPI_EVENT_FLAG_WAKE_ENABLED;
+    }
+
+    /* GPE currently active (status bit == 1)? */
+
+    Status = AcpiHwRead (&InByte, &GpeRegisterInfo->StatusAddress);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    if (RegisterBit & InByte)
+    {
+        LocalEventStatus |= ACPI_EVENT_FLAG_SET;
+    }
+
+    /* Set return value */
+
+    (*EventStatus) = LocalEventStatus;
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwDisableGpeBlock
+ *
+ * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
+ *              GpeBlock            - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable all GPEs within a single GPE block
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwDisableGpeBlock (
+    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
+    ACPI_GPE_BLOCK_INFO     *GpeBlock,
+    void                    *Context)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+
+
+    /* Examine each GPE Register within the block */
+
+    for (i = 0; i < GpeBlock->RegisterCount; i++)
+    {
+        /* Disable all GPEs in this register */
+
+        Status = AcpiHwWrite (0x00, &GpeBlock->RegisterInfo[i].EnableAddress);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwClearGpeBlock
+ *
+ * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
+ *              GpeBlock            - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwClearGpeBlock (
+    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
+    ACPI_GPE_BLOCK_INFO     *GpeBlock,
+    void                    *Context)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+
+
+    /* Examine each GPE Register within the block */
+
+    for (i = 0; i < GpeBlock->RegisterCount; i++)
+    {
+        /* Clear status on all GPEs in this register */
+
+        Status = AcpiHwWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwEnableRuntimeGpeBlock
+ *
+ * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
+ *              GpeBlock            - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
+ *              combination wake/run GPEs.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwEnableRuntimeGpeBlock (
+    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
+    ACPI_GPE_BLOCK_INFO     *GpeBlock,
+    void                    *Context)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+
+
+    /* NOTE: assumes that all GPEs are currently disabled */
+
+    /* Examine each GPE Register within the block */
+
+    for (i = 0; i < GpeBlock->RegisterCount; i++)
+    {
+        if (!GpeBlock->RegisterInfo[i].EnableForRun)
+        {
+            continue;
+        }
+
+        /* Enable all "runtime" GPEs in this register */
+
+        Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForRun,
+                    &GpeBlock->RegisterInfo[i].EnableAddress);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwEnableWakeupGpeBlock
+ *
+ * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
+ *              GpeBlock            - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
+ *              combination wake/run GPEs.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwEnableWakeupGpeBlock (
+    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
+    ACPI_GPE_BLOCK_INFO     *GpeBlock,
+    void                    *Context)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+
+
+    /* Examine each GPE Register within the block */
+
+    for (i = 0; i < GpeBlock->RegisterCount; i++)
+    {
+        if (!GpeBlock->RegisterInfo[i].EnableForWake)
+        {
+            continue;
+        }
+
+        /* Enable all "wake" GPEs in this register */
+
+        Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForWake,
+                    &GpeBlock->RegisterInfo[i].EnableAddress);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwDisableAllGpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwDisableAllGpes (
+    void)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwDisableAllGpes);
+
+
+    Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
+    Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock, NULL);
+    return_ACPI_STATUS (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwEnableAllRuntimeGpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwEnableAllRuntimeGpes (
+    void)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwEnableAllRuntimeGpes);
+
+
+    Status = AcpiEvWalkGpeList (AcpiHwEnableRuntimeGpeBlock, NULL);
+    return_ACPI_STATUS (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwEnableAllWakeupGpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwEnableAllWakeupGpes (
+    void)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwEnableAllWakeupGpes);
+
+
+    Status = AcpiEvWalkGpeList (AcpiHwEnableWakeupGpeBlock, NULL);
+    return_ACPI_STATUS (Status);
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/source/components/hardware/hwpci.c b/source/components/hardware/hwpci.c
new file mode 100644
index 000000000000..065e42d95eb6
--- /dev/null
+++ b/source/components/hardware/hwpci.c
@@ -0,0 +1,459 @@
+/*******************************************************************************
+ *
+ * Module Name: hwpci - Obtain PCI bus, device, and function numbers
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#define __HWPCI_C__
+
+#include "acpi.h"
+#include "accommon.h"
+
+
+#define _COMPONENT          ACPI_NAMESPACE
+        ACPI_MODULE_NAME    ("hwpci")
+
+
+/* PCI configuration space values */
+
+#define PCI_CFG_HEADER_TYPE_REG             0x0E
+#define PCI_CFG_PRIMARY_BUS_NUMBER_REG      0x18
+#define PCI_CFG_SECONDARY_BUS_NUMBER_REG    0x19
+
+/* PCI header values */
+
+#define PCI_HEADER_TYPE_MASK                0x7F
+#define PCI_TYPE_BRIDGE                     0x01
+#define PCI_TYPE_CARDBUS_BRIDGE             0x02
+
+typedef struct acpi_pci_device
+{
+    ACPI_HANDLE             Device;
+    struct acpi_pci_device  *Next;
+
+} ACPI_PCI_DEVICE;
+
+
+/* Local prototypes */
+
+static ACPI_STATUS
+AcpiHwBuildPciList (
+    ACPI_HANDLE             RootPciDevice,
+    ACPI_HANDLE             PciRegion,
+    ACPI_PCI_DEVICE         **ReturnListHead);
+
+static ACPI_STATUS
+AcpiHwProcessPciList (
+    ACPI_PCI_ID             *PciId,
+    ACPI_PCI_DEVICE         *ListHead);
+
+static void
+AcpiHwDeletePciList (
+    ACPI_PCI_DEVICE         *ListHead);
+
+static ACPI_STATUS
+AcpiHwGetPciDeviceInfo (
+    ACPI_PCI_ID             *PciId,
+    ACPI_HANDLE             PciDevice,
+    UINT16                  *BusNumber,
+    BOOLEAN                 *IsBridge);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwDerivePciId
+ *
+ * PARAMETERS:  PciId               - Initial values for the PCI ID. May be
+ *                                    modified by this function.
+ *              RootPciDevice       - A handle to a PCI device object. This
+ *                                    object must be a PCI Root Bridge having a
+ *                                    _HID value of either PNP0A03 or PNP0A08
+ *              PciRegion           - A handle to a PCI configuration space
+ *                                    Operation Region being initialized
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function derives a full PCI ID for a PCI device,
+ *              consisting of a Segment number, Bus number, Device number,
+ *              and function code.
+ *
+ *              The PCI hardware dynamically configures PCI bus numbers
+ *              depending on the bus topology discovered during system
+ *              initialization. This function is invoked during configuration
+ *              of a PCI_Config Operation Region in order to (possibly) update
+ *              the Bus/Device/Function numbers in the PciId with the actual
+ *              values as determined by the hardware and operating system
+ *              configuration.
+ *
+ *              The PciId parameter is initially populated during the Operation
+ *              Region initialization. This function is then called, and is
+ *              will make any necessary modifications to the Bus, Device, or
+ *              Function number PCI ID subfields as appropriate for the
+ *              current hardware and OS configuration.
+ *
+ * NOTE:        Created 08/2010. Replaces the previous OSL AcpiOsDerivePciId
+ *              interface since this feature is OS-independent. This module
+ *              specifically avoids any use of recursion by building a local
+ *              temporary device list.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwDerivePciId (
+    ACPI_PCI_ID             *PciId,
+    ACPI_HANDLE             RootPciDevice,
+    ACPI_HANDLE             PciRegion)
+{
+    ACPI_STATUS             Status;
+    ACPI_PCI_DEVICE         *ListHead = NULL;
+
+
+    ACPI_FUNCTION_TRACE (HwDerivePciId);
+
+
+    if (!PciId)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    /* Build a list of PCI devices, from PciRegion up to RootPciDevice */
+
+    Status = AcpiHwBuildPciList (RootPciDevice, PciRegion, &ListHead);
+    if (ACPI_SUCCESS (Status))
+    {
+        /* Walk the list, updating the PCI device/function/bus numbers */
+
+        Status = AcpiHwProcessPciList (PciId, ListHead);
+    }
+
+    /* Always delete the list */
+
+    AcpiHwDeletePciList (ListHead);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwBuildPciList
+ *
+ * PARAMETERS:  RootPciDevice       - A handle to a PCI device object. This
+ *                                    object is guaranteed to be a PCI Root
+ *                                    Bridge having a _HID value of either
+ *                                    PNP0A03 or PNP0A08
+ *              PciRegion           - A handle to the PCI configuration space
+ *                                    Operation Region
+ *              ReturnListHead      - Where the PCI device list is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Builds a list of devices from the input PCI region up to the
+ *              Root PCI device for this namespace subtree.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwBuildPciList (
+    ACPI_HANDLE             RootPciDevice,
+    ACPI_HANDLE             PciRegion,
+    ACPI_PCI_DEVICE         **ReturnListHead)
+{
+    ACPI_HANDLE             CurrentDevice;
+    ACPI_HANDLE             ParentDevice;
+    ACPI_STATUS             Status;
+    ACPI_PCI_DEVICE         *ListElement;
+    ACPI_PCI_DEVICE         *ListHead = NULL;
+
+
+    /*
+     * Ascend namespace branch until the RootPciDevice is reached, building
+     * a list of device nodes. Loop will exit when either the PCI device is
+     * found, or the root of the namespace is reached.
+     */
+    CurrentDevice = PciRegion;
+    while (1)
+    {
+        Status = AcpiGetParent (CurrentDevice, &ParentDevice);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+
+        /* Finished when we reach the PCI root device (PNP0A03 or PNP0A08) */
+
+        if (ParentDevice == RootPciDevice)
+        {
+            *ReturnListHead = ListHead;
+            return (AE_OK);
+        }
+
+        ListElement = ACPI_ALLOCATE (sizeof (ACPI_PCI_DEVICE));
+        if (!ListElement)
+        {
+            return (AE_NO_MEMORY);
+        }
+
+        /* Put new element at the head of the list */
+
+        ListElement->Next = ListHead;
+        ListElement->Device = ParentDevice;
+        ListHead = ListElement;
+
+        CurrentDevice = ParentDevice;
+    }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwProcessPciList
+ *
+ * PARAMETERS:  PciId               - Initial values for the PCI ID. May be
+ *                                    modified by this function.
+ *              ListHead            - Device list created by
+ *                                    AcpiHwBuildPciList
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk downward through the PCI device list, getting the device
+ *              info for each, via the PCI configuration space and updating
+ *              the PCI ID as necessary. Deletes the list during traversal.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwProcessPciList (
+    ACPI_PCI_ID             *PciId,
+    ACPI_PCI_DEVICE         *ListHead)
+{
+    ACPI_STATUS             Status = AE_OK;
+    ACPI_PCI_DEVICE         *Info;
+    UINT16                  BusNumber;
+    BOOLEAN                 IsBridge = TRUE;
+
+
+    ACPI_FUNCTION_NAME (HwProcessPciList);
+
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Input PciId:  Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X\n",
+        PciId->Segment, PciId->Bus, PciId->Device, PciId->Function));
+
+    BusNumber = PciId->Bus;
+
+    /*
+     * Descend down the namespace tree, collecting PCI device, function,
+     * and bus numbers. BusNumber is only important for PCI bridges.
+     * Algorithm: As we descend the tree, use the last valid PCI device,
+     * function, and bus numbers that are discovered, and assign them
+     * to the PCI ID for the target device.
+     */
+    Info = ListHead;
+    while (Info)
+    {
+        Status = AcpiHwGetPciDeviceInfo (PciId, Info->Device,
+            &BusNumber, &IsBridge);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+        Info = Info->Next;
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Output PciId: Seg %4.4X Bus %4.4X Dev %4.4X Func %4.4X "
+        "Status %X BusNumber %X IsBridge %X\n",
+        PciId->Segment, PciId->Bus, PciId->Device, PciId->Function,
+        Status, BusNumber, IsBridge));
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwDeletePciList
+ *
+ * PARAMETERS:  ListHead            - Device list created by
+ *                                    AcpiHwBuildPciList
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Free the entire PCI list.
+ *
+ ******************************************************************************/
+
+static void
+AcpiHwDeletePciList (
+    ACPI_PCI_DEVICE         *ListHead)
+{
+    ACPI_PCI_DEVICE         *Next;
+    ACPI_PCI_DEVICE         *Previous;
+
+
+    Next = ListHead;
+    while (Next)
+    {
+        Previous = Next;
+        Next = Previous->Next;
+        ACPI_FREE (Previous);
+    }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetPciDeviceInfo
+ *
+ * PARAMETERS:  PciId               - Initial values for the PCI ID. May be
+ *                                    modified by this function.
+ *              PciDevice           - Handle for the PCI device object
+ *              BusNumber           - Where a PCI bridge bus number is returned
+ *              IsBridge            - Return value, indicates if this PCI
+ *                                    device is a PCI bridge
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get the device info for a single PCI device object. Get the
+ *              _ADR (contains PCI device and function numbers), and for PCI
+ *              bridge devices, get the bus number from PCI configuration
+ *              space.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwGetPciDeviceInfo (
+    ACPI_PCI_ID             *PciId,
+    ACPI_HANDLE             PciDevice,
+    UINT16                  *BusNumber,
+    BOOLEAN                 *IsBridge)
+{
+    ACPI_STATUS             Status;
+    ACPI_OBJECT_TYPE        ObjectType;
+    UINT64                  ReturnValue;
+    UINT64                  PciValue;
+
+
+    /* We only care about objects of type Device */
+
+    Status = AcpiGetType (PciDevice, &ObjectType);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    if (ObjectType != ACPI_TYPE_DEVICE)
+    {
+        return (AE_OK);
+    }
+
+    /* We need an _ADR. Ignore device if not present */
+
+    Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
+        PciDevice, &ReturnValue);
+    if (ACPI_FAILURE (Status))
+    {
+        return (AE_OK);
+    }
+
+    /*
+     * From _ADR, get the PCI Device and Function and
+     * update the PCI ID.
+     */
+    PciId->Device = ACPI_HIWORD (ACPI_LODWORD (ReturnValue));
+    PciId->Function = ACPI_LOWORD (ACPI_LODWORD (ReturnValue));
+
+    /*
+     * If the previous device was a bridge, use the previous
+     * device bus number
+     */
+    if (*IsBridge)
+    {
+        PciId->Bus = *BusNumber;
+    }
+
+    /*
+     * Get the bus numbers from PCI Config space:
+     *
+     * First, get the PCI HeaderType
+     */
+    *IsBridge = FALSE;
+    Status = AcpiOsReadPciConfiguration (PciId,
+        PCI_CFG_HEADER_TYPE_REG, &PciValue, 8);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /* We only care about bridges (1=PciBridge, 2=CardBusBridge) */
+
+    PciValue &= PCI_HEADER_TYPE_MASK;
+
+    if ((PciValue != PCI_TYPE_BRIDGE) &&
+        (PciValue != PCI_TYPE_CARDBUS_BRIDGE))
+    {
+        return (AE_OK);
+    }
+
+    /* Bridge: Get the Primary BusNumber */
+
+    Status = AcpiOsReadPciConfiguration (PciId,
+        PCI_CFG_PRIMARY_BUS_NUMBER_REG, &PciValue, 8);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    *IsBridge = TRUE;
+    PciId->Bus = (UINT16) PciValue;
+
+    /* Bridge: Get the Secondary BusNumber */
+
+    Status = AcpiOsReadPciConfiguration (PciId,
+        PCI_CFG_SECONDARY_BUS_NUMBER_REG, &PciValue, 8);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    *BusNumber = (UINT16) PciValue;
+    return (AE_OK);
+}
diff --git a/source/components/hardware/hwregs.c b/source/components/hardware/hwregs.c
new file mode 100644
index 000000000000..6d89883179f4
--- /dev/null
+++ b/source/components/hardware/hwregs.c
@@ -0,0 +1,741 @@
+
+/*******************************************************************************
+ *
+ * Module Name: hwregs - Read/write access functions for the various ACPI
+ *                       control and status registers.
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#define __HWREGS_C__
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwregs")
+
+
+#if (!ACPI_REDUCED_HARDWARE)
+
+/* Local Prototypes */
+
+static ACPI_STATUS
+AcpiHwReadMultiple (
+    UINT32                  *Value,
+    ACPI_GENERIC_ADDRESS    *RegisterA,
+    ACPI_GENERIC_ADDRESS    *RegisterB);
+
+static ACPI_STATUS
+AcpiHwWriteMultiple (
+    UINT32                  Value,
+    ACPI_GENERIC_ADDRESS    *RegisterA,
+    ACPI_GENERIC_ADDRESS    *RegisterB);
+
+#endif /* !ACPI_REDUCED_HARDWARE */
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwValidateRegister
+ *
+ * PARAMETERS:  Reg                 - GAS register structure
+ *              MaxBitWidth         - Max BitWidth supported (32 or 64)
+ *              Address             - Pointer to where the gas->address
+ *                                    is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validate the contents of a GAS register. Checks the GAS
+ *              pointer, Address, SpaceId, BitWidth, and BitOffset.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwValidateRegister (
+    ACPI_GENERIC_ADDRESS    *Reg,
+    UINT8                   MaxBitWidth,
+    UINT64                  *Address)
+{
+
+    /* Must have a valid pointer to a GAS structure */
+
+    if (!Reg)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /*
+     * Copy the target address. This handles possible alignment issues.
+     * Address must not be null. A null address also indicates an optional
+     * ACPI register that is not supported, so no error message.
+     */
+    ACPI_MOVE_64_TO_64 (Address, &Reg->Address);
+    if (!(*Address))
+    {
+        return (AE_BAD_ADDRESS);
+    }
+
+    /* Validate the SpaceID */
+
+    if ((Reg->SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
+        (Reg->SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Unsupported address space: 0x%X", Reg->SpaceId));
+        return (AE_SUPPORT);
+    }
+
+    /* Validate the BitWidth */
+
+    if ((Reg->BitWidth != 8) &&
+        (Reg->BitWidth != 16) &&
+        (Reg->BitWidth != 32) &&
+        (Reg->BitWidth != MaxBitWidth))
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Unsupported register bit width: 0x%X", Reg->BitWidth));
+        return (AE_SUPPORT);
+    }
+
+    /* Validate the BitOffset. Just a warning for now. */
+
+    if (Reg->BitOffset != 0)
+    {
+        ACPI_WARNING ((AE_INFO,
+            "Unsupported register bit offset: 0x%X", Reg->BitOffset));
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwRead
+ *
+ * PARAMETERS:  Value               - Where the value is returned
+ *              Reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read from either memory or IO space. This is a 32-bit max
+ *              version of AcpiRead, used internally since the overhead of
+ *              64-bit values is not needed.
+ *
+ * LIMITATIONS: <These limitations also apply to AcpiHwWrite>
+ *      BitWidth must be exactly 8, 16, or 32.
+ *      SpaceID must be SystemMemory or SystemIO.
+ *      BitOffset and AccessWidth are currently ignored, as there has
+ *          not been a need to implement these.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwRead (
+    UINT32                  *Value,
+    ACPI_GENERIC_ADDRESS    *Reg)
+{
+    UINT64                  Address;
+    UINT64                  Value64;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_NAME (HwRead);
+
+
+    /* Validate contents of the GAS register */
+
+    Status = AcpiHwValidateRegister (Reg, 32, &Address);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /* Initialize entire 32-bit return value to zero */
+
+    *Value = 0;
+
+    /*
+     * Two address spaces supported: Memory or IO. PCI_Config is
+     * not supported here because the GAS structure is insufficient
+     */
+    if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+    {
+        Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
+                    Address, &Value64, Reg->BitWidth);
+
+        *Value = (UINT32) Value64;
+    }
+    else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+    {
+        Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
+                    Address, Value, Reg->BitWidth);
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO,
+        "Read:  %8.8X width %2d from %8.8X%8.8X (%s)\n",
+        *Value, Reg->BitWidth, ACPI_FORMAT_UINT64 (Address),
+        AcpiUtGetRegionName (Reg->SpaceId)));
+
+    return (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwWrite
+ *
+ * PARAMETERS:  Value               - Value to be written
+ *              Reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write to either memory or IO space. This is a 32-bit max
+ *              version of AcpiWrite, used internally since the overhead of
+ *              64-bit values is not needed.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwWrite (
+    UINT32                  Value,
+    ACPI_GENERIC_ADDRESS    *Reg)
+{
+    UINT64                  Address;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_NAME (HwWrite);
+
+
+    /* Validate contents of the GAS register */
+
+    Status = AcpiHwValidateRegister (Reg, 32, &Address);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /*
+     * Two address spaces supported: Memory or IO. PCI_Config is
+     * not supported here because the GAS structure is insufficient
+     */
+    if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+    {
+        Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
+                    Address, (UINT64) Value, Reg->BitWidth);
+    }
+    else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+    {
+        Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
+                    Address, Value, Reg->BitWidth);
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO,
+        "Wrote: %8.8X width %2d   to %8.8X%8.8X (%s)\n",
+        Value, Reg->BitWidth, ACPI_FORMAT_UINT64 (Address),
+        AcpiUtGetRegionName (Reg->SpaceId)));
+
+    return (Status);
+}
+
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwClearAcpiStatus
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clears all fixed and general purpose status bits
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwClearAcpiStatus (
+    void)
+{
+    ACPI_STATUS             Status;
+    ACPI_CPU_FLAGS          LockFlags = 0;
+
+
+    ACPI_FUNCTION_TRACE (HwClearAcpiStatus);
+
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %8.8X%8.8X\n",
+        ACPI_BITMASK_ALL_FIXED_STATUS,
+        ACPI_FORMAT_UINT64 (AcpiGbl_XPm1aStatus.Address)));
+
+    LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
+
+    /* Clear the fixed events in PM1 A/B */
+
+    Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
+                ACPI_BITMASK_ALL_FIXED_STATUS);
+    if (ACPI_FAILURE (Status))
+    {
+        goto UnlockAndExit;
+    }
+
+    /* Clear the GPE Bits in all GPE registers in all GPE blocks */
+
+    Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock, NULL);
+
+UnlockAndExit:
+    AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetBitRegisterInfo
+ *
+ * PARAMETERS:  RegisterId          - Index of ACPI Register to access
+ *
+ * RETURN:      The bitmask to be used when accessing the register
+ *
+ * DESCRIPTION: Map RegisterId into a register bitmask.
+ *
+ ******************************************************************************/
+
+ACPI_BIT_REGISTER_INFO *
+AcpiHwGetBitRegisterInfo (
+    UINT32                  RegisterId)
+{
+    ACPI_FUNCTION_ENTRY ();
+
+
+    if (RegisterId > ACPI_BITREG_MAX)
+    {
+        ACPI_ERROR ((AE_INFO, "Invalid BitRegister ID: 0x%X", RegisterId));
+        return (NULL);
+    }
+
+    return (&AcpiGbl_BitRegisterInfo[RegisterId]);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwWritePm1Control
+ *
+ * PARAMETERS:  Pm1aControl         - Value to be written to PM1A control
+ *              Pm1bControl         - Value to be written to PM1B control
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write the PM1 A/B control registers. These registers are
+ *              different than than the PM1 A/B status and enable registers
+ *              in that different values can be written to the A/B registers.
+ *              Most notably, the SLP_TYP bits can be different, as per the
+ *              values returned from the _Sx predefined methods.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwWritePm1Control (
+    UINT32                  Pm1aControl,
+    UINT32                  Pm1bControl)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwWritePm1Control);
+
+
+    Status = AcpiHwWrite (Pm1aControl, &AcpiGbl_FADT.XPm1aControlBlock);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    if (AcpiGbl_FADT.XPm1bControlBlock.Address)
+    {
+        Status = AcpiHwWrite (Pm1bControl, &AcpiGbl_FADT.XPm1bControlBlock);
+    }
+    return_ACPI_STATUS (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwRegisterRead
+ *
+ * PARAMETERS:  RegisterId          - ACPI Register ID
+ *              ReturnValue         - Where the register value is returned
+ *
+ * RETURN:      Status and the value read.
+ *
+ * DESCRIPTION: Read from the specified ACPI register
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwRegisterRead (
+    UINT32                  RegisterId,
+    UINT32                  *ReturnValue)
+{
+    UINT32                  Value = 0;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwRegisterRead);
+
+
+    switch (RegisterId)
+    {
+    case ACPI_REGISTER_PM1_STATUS:           /* PM1 A/B: 16-bit access each */
+
+        Status = AcpiHwReadMultiple (&Value,
+                    &AcpiGbl_XPm1aStatus,
+                    &AcpiGbl_XPm1bStatus);
+        break;
+
+
+    case ACPI_REGISTER_PM1_ENABLE:           /* PM1 A/B: 16-bit access each */
+
+        Status = AcpiHwReadMultiple (&Value,
+                    &AcpiGbl_XPm1aEnable,
+                    &AcpiGbl_XPm1bEnable);
+        break;
+
+
+    case ACPI_REGISTER_PM1_CONTROL:          /* PM1 A/B: 16-bit access each */
+
+        Status = AcpiHwReadMultiple (&Value,
+                    &AcpiGbl_FADT.XPm1aControlBlock,
+                    &AcpiGbl_FADT.XPm1bControlBlock);
+
+        /*
+         * Zero the write-only bits. From the ACPI specification, "Hardware
+         * Write-Only Bits": "Upon reads to registers with write-only bits,
+         * software masks out all write-only bits."
+         */
+        Value &= ~ACPI_PM1_CONTROL_WRITEONLY_BITS;
+        break;
+
+
+    case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */
+
+        Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPm2ControlBlock);
+        break;
+
+
+    case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */
+
+        Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPmTimerBlock);
+        break;
+
+
+    case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */
+
+        Status = AcpiHwReadPort (AcpiGbl_FADT.SmiCommand, &Value, 8);
+        break;
+
+
+    default:
+        ACPI_ERROR ((AE_INFO, "Unknown Register ID: 0x%X",
+            RegisterId));
+        Status = AE_BAD_PARAMETER;
+        break;
+    }
+
+    if (ACPI_SUCCESS (Status))
+    {
+        *ReturnValue = Value;
+    }
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwRegisterWrite
+ *
+ * PARAMETERS:  RegisterId          - ACPI Register ID
+ *              Value               - The value to write
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write to the specified ACPI register
+ *
+ * NOTE: In accordance with the ACPI specification, this function automatically
+ * preserves the value of the following bits, meaning that these bits cannot be
+ * changed via this interface:
+ *
+ * PM1_CONTROL[0] = SCI_EN
+ * PM1_CONTROL[9]
+ * PM1_STATUS[11]
+ *
+ * ACPI References:
+ * 1) Hardware Ignored Bits: When software writes to a register with ignored
+ *      bit fields, it preserves the ignored bit fields
+ * 2) SCI_EN: OSPM always preserves this bit position
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwRegisterWrite (
+    UINT32                  RegisterId,
+    UINT32                  Value)
+{
+    ACPI_STATUS             Status;
+    UINT32                  ReadValue;
+
+
+    ACPI_FUNCTION_TRACE (HwRegisterWrite);
+
+
+    switch (RegisterId)
+    {
+    case ACPI_REGISTER_PM1_STATUS:           /* PM1 A/B: 16-bit access each */
+        /*
+         * Handle the "ignored" bit in PM1 Status. According to the ACPI
+         * specification, ignored bits are to be preserved when writing.
+         * Normally, this would mean a read/modify/write sequence. However,
+         * preserving a bit in the status register is different. Writing a
+         * one clears the status, and writing a zero preserves the status.
+         * Therefore, we must always write zero to the ignored bit.
+         *
+         * This behavior is clarified in the ACPI 4.0 specification.
+         */
+        Value &= ~ACPI_PM1_STATUS_PRESERVED_BITS;
+
+        Status = AcpiHwWriteMultiple (Value,
+                    &AcpiGbl_XPm1aStatus,
+                    &AcpiGbl_XPm1bStatus);
+        break;
+
+
+    case ACPI_REGISTER_PM1_ENABLE:           /* PM1 A/B: 16-bit access each */
+
+        Status = AcpiHwWriteMultiple (Value,
+                    &AcpiGbl_XPm1aEnable,
+                    &AcpiGbl_XPm1bEnable);
+        break;
+
+
+    case ACPI_REGISTER_PM1_CONTROL:          /* PM1 A/B: 16-bit access each */
+
+        /*
+         * Perform a read first to preserve certain bits (per ACPI spec)
+         * Note: This includes SCI_EN, we never want to change this bit
+         */
+        Status = AcpiHwReadMultiple (&ReadValue,
+                    &AcpiGbl_FADT.XPm1aControlBlock,
+                    &AcpiGbl_FADT.XPm1bControlBlock);
+        if (ACPI_FAILURE (Status))
+        {
+            goto Exit;
+        }
+
+        /* Insert the bits to be preserved */
+
+        ACPI_INSERT_BITS (Value, ACPI_PM1_CONTROL_PRESERVED_BITS, ReadValue);
+
+        /* Now we can write the data */
+
+        Status = AcpiHwWriteMultiple (Value,
+                    &AcpiGbl_FADT.XPm1aControlBlock,
+                    &AcpiGbl_FADT.XPm1bControlBlock);
+        break;
+
+
+    case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */
+
+        /*
+         * For control registers, all reserved bits must be preserved,
+         * as per the ACPI spec.
+         */
+        Status = AcpiHwRead (&ReadValue, &AcpiGbl_FADT.XPm2ControlBlock);
+        if (ACPI_FAILURE (Status))
+        {
+            goto Exit;
+        }
+
+        /* Insert the bits to be preserved */
+
+        ACPI_INSERT_BITS (Value, ACPI_PM2_CONTROL_PRESERVED_BITS, ReadValue);
+
+        Status = AcpiHwWrite (Value, &AcpiGbl_FADT.XPm2ControlBlock);
+        break;
+
+
+    case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */
+
+        Status = AcpiHwWrite (Value, &AcpiGbl_FADT.XPmTimerBlock);
+        break;
+
+
+    case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */
+
+        /* SMI_CMD is currently always in IO space */
+
+        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, Value, 8);
+        break;
+
+
+    default:
+        ACPI_ERROR ((AE_INFO, "Unknown Register ID: 0x%X",
+            RegisterId));
+        Status = AE_BAD_PARAMETER;
+        break;
+    }
+
+Exit:
+    return_ACPI_STATUS (Status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwReadMultiple
+ *
+ * PARAMETERS:  Value               - Where the register value is returned
+ *              RegisterA           - First ACPI register (required)
+ *              RegisterB           - Second ACPI register (optional)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read from the specified two-part ACPI register (such as PM1 A/B)
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwReadMultiple (
+    UINT32                  *Value,
+    ACPI_GENERIC_ADDRESS    *RegisterA,
+    ACPI_GENERIC_ADDRESS    *RegisterB)
+{
+    UINT32                  ValueA = 0;
+    UINT32                  ValueB = 0;
+    ACPI_STATUS             Status;
+
+
+    /* The first register is always required */
+
+    Status = AcpiHwRead (&ValueA, RegisterA);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /* Second register is optional */
+
+    if (RegisterB->Address)
+    {
+        Status = AcpiHwRead (&ValueB, RegisterB);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+
+    /*
+     * OR the two return values together. No shifting or masking is necessary,
+     * because of how the PM1 registers are defined in the ACPI specification:
+     *
+     * "Although the bits can be split between the two register blocks (each
+     * register block has a unique pointer within the FADT), the bit positions
+     * are maintained. The register block with unimplemented bits (that is,
+     * those implemented in the other register block) always returns zeros,
+     * and writes have no side effects"
+     */
+    *Value = (ValueA | ValueB);
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwWriteMultiple
+ *
+ * PARAMETERS:  Value               - The value to write
+ *              RegisterA           - First ACPI register (required)
+ *              RegisterB           - Second ACPI register (optional)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write to the specified two-part ACPI register (such as PM1 A/B)
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwWriteMultiple (
+    UINT32                  Value,
+    ACPI_GENERIC_ADDRESS    *RegisterA,
+    ACPI_GENERIC_ADDRESS    *RegisterB)
+{
+    ACPI_STATUS             Status;
+
+
+    /* The first register is always required */
+
+    Status = AcpiHwWrite (Value, RegisterA);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /*
+     * Second register is optional
+     *
+     * No bit shifting or clearing is necessary, because of how the PM1
+     * registers are defined in the ACPI specification:
+     *
+     * "Although the bits can be split between the two register blocks (each
+     * register block has a unique pointer within the FADT), the bit positions
+     * are maintained. The register block with unimplemented bits (that is,
+     * those implemented in the other register block) always returns zeros,
+     * and writes have no side effects"
+     */
+    if (RegisterB->Address)
+    {
+        Status = AcpiHwWrite (Value, RegisterB);
+    }
+
+    return (Status);
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/source/components/hardware/hwsleep.c b/source/components/hardware/hwsleep.c
new file mode 100644
index 000000000000..0d311435555a
--- /dev/null
+++ b/source/components/hardware/hwsleep.c
@@ -0,0 +1,384 @@
+/******************************************************************************
+ *
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ *                   original/legacy sleep/PM registers.
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwsleep")
+
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwLegacySleep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwLegacySleep (
+    UINT8                   SleepState)
+{
+    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
+    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
+    UINT32                  Pm1aControl;
+    UINT32                  Pm1bControl;
+    UINT32                  InValue;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwLegacySleep);
+
+
+    SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
+    SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
+
+    /* Clear wake status */
+
+    Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Clear all fixed and general purpose status bits */
+
+    Status = AcpiHwClearAcpiStatus ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    if (SleepState != ACPI_STATE_S5)
+    {
+        /*
+         * Disable BM arbitration. This feature is contained within an
+         * optional register (PM2 Control), so ignore a BAD_ADDRESS
+         * exception.
+         */
+        Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1);
+        if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS))
+        {
+            return_ACPI_STATUS (Status);
+        }
+    }
+
+    /*
+     * 1) Disable/Clear all GPEs
+     * 2) Enable all wakeup GPEs
+     */
+    Status = AcpiHwDisableAllGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+    AcpiGbl_SystemAwakeAndRunning = FALSE;
+
+    Status = AcpiHwEnableAllWakeupGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Execute the _GTS method (Going To Sleep) */
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__GTS, SleepState);
+
+    /* Get current value of PM1A control */
+
+    Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
+                &Pm1aControl);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+    ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
+        "Entering sleep state [S%u]\n", SleepState));
+
+    /* Clear the SLP_EN and SLP_TYP fields */
+
+    Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
+                     SleepEnableRegInfo->AccessBitMask);
+    Pm1bControl = Pm1aControl;
+
+    /* Insert the SLP_TYP bits */
+
+    Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
+    Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
+
+    /*
+     * We split the writes of SLP_TYP and SLP_EN to workaround
+     * poorly implemented hardware.
+     */
+
+    /* Write #1: write the SLP_TYP data to the PM1 Control registers */
+
+    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Insert the sleep enable (SLP_EN) bit */
+
+    Pm1aControl |= SleepEnableRegInfo->AccessBitMask;
+    Pm1bControl |= SleepEnableRegInfo->AccessBitMask;
+
+    /* Flush caches, as per ACPI specification */
+
+    ACPI_FLUSH_CPU_CACHE ();
+
+    /* Write #2: Write both SLP_TYP + SLP_EN */
+
+    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    if (SleepState > ACPI_STATE_S3)
+    {
+        /*
+         * We wanted to sleep > S3, but it didn't happen (by virtue of the
+         * fact that we are still executing!)
+         *
+         * Wait ten seconds, then try again. This is to get S4/S5 to work on
+         * all machines.
+         *
+         * We wait so long to allow chipsets that poll this reg very slowly
+         * to still read the right value. Ideally, this block would go
+         * away entirely.
+         */
+        AcpiOsStall (10000000);
+
+        Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL,
+                    SleepEnableRegInfo->AccessBitMask);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+    }
+
+    /* Wait for transition back to Working State */
+
+    do
+    {
+        Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+    } while (!InValue);
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwLegacyWakePrep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
+ *              sleep.
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwLegacyWakePrep (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
+    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
+    UINT32                  Pm1aControl;
+    UINT32                  Pm1bControl;
+
+
+    ACPI_FUNCTION_TRACE (HwLegacyWakePrep);
+
+    /*
+     * Set SLP_TYPE and SLP_EN to state S0.
+     * This is unclear from the ACPI Spec, but it is required
+     * by some machines.
+     */
+    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
+                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
+    if (ACPI_SUCCESS (Status))
+    {
+        SleepTypeRegInfo =
+            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
+        SleepEnableRegInfo =
+            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
+
+        /* Get current value of PM1A control */
+
+        Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
+                    &Pm1aControl);
+        if (ACPI_SUCCESS (Status))
+        {
+            /* Clear the SLP_EN and SLP_TYP fields */
+
+            Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
+                SleepEnableRegInfo->AccessBitMask);
+            Pm1bControl = Pm1aControl;
+
+            /* Insert the SLP_TYP bits */
+
+            Pm1aControl |= (AcpiGbl_SleepTypeA <<
+                SleepTypeRegInfo->BitPosition);
+            Pm1bControl |= (AcpiGbl_SleepTypeB <<
+                SleepTypeRegInfo->BitPosition);
+
+            /* Write the control registers and ignore any errors */
+
+            (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
+        }
+    }
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__BFS, SleepState);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwLegacyWake
+ *
+ * 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
+AcpiHwLegacyWake (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwLegacyWake);
+
+
+    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
+
+    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WAKING);
+
+    /*
+     * GPEs must be enabled before _WAK is called as GPEs
+     * might get fired there
+     *
+     * Restore the GPEs:
+     * 1) Disable/Clear all GPEs
+     * 2) Enable all runtime GPEs
+     */
+    Status = AcpiHwDisableAllGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    Status = AcpiHwEnableAllRuntimeGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * Now we can execute _WAK, etc. Some machines require that the GPEs
+     * are enabled before the wake methods are executed.
+     */
+    AcpiHwExecuteSleepMethod (METHOD_NAME__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) AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
+    AcpiGbl_SystemAwakeAndRunning = TRUE;
+
+    /* Enable power button */
+
+    (void) AcpiWriteBitRegister(
+            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId,
+            ACPI_ENABLE_EVENT);
+
+    (void) AcpiWriteBitRegister(
+            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId,
+            ACPI_CLEAR_STATUS);
+
+    /*
+     * Enable BM arbitration. This feature is contained within an
+     * optional register (PM2 Control), so ignore a BAD_ADDRESS
+     * exception.
+     */
+    Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0);
+    if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WORKING);
+    return_ACPI_STATUS (Status);
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/source/components/hardware/hwtimer.c b/source/components/hardware/hwtimer.c
new file mode 100644
index 000000000000..15dc58f0bffe
--- /dev/null
+++ b/source/components/hardware/hwtimer.c
@@ -0,0 +1,218 @@
+
+/******************************************************************************
+ *
+ * Name: hwtimer.c - ACPI Power Management Timer Interface
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwtimer")
+
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiGetTimerResolution
+ *
+ * PARAMETERS:  Resolution          - Where the resolution is returned
+ *
+ * RETURN:      Status and timer resolution
+ *
+ * DESCRIPTION: Obtains resolution of the ACPI PM Timer (24 or 32 bits).
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiGetTimerResolution (
+    UINT32                  *Resolution)
+{
+    ACPI_FUNCTION_TRACE (AcpiGetTimerResolution);
+
+
+    if (!Resolution)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    if ((AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
+    {
+        *Resolution = 24;
+    }
+    else
+    {
+        *Resolution = 32;
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiGetTimerResolution)
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiGetTimer
+ *
+ * PARAMETERS:  Ticks               - Where the timer value is returned
+ *
+ * RETURN:      Status and current timer value (ticks)
+ *
+ * DESCRIPTION: Obtains current value of ACPI PM Timer (in ticks).
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiGetTimer (
+    UINT32                  *Ticks)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiGetTimer);
+
+
+    if (!Ticks)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiHwRead (Ticks, &AcpiGbl_FADT.XPmTimerBlock);
+
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiGetTimer)
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiGetTimerDuration
+ *
+ * PARAMETERS:  StartTicks          - Starting timestamp
+ *              EndTicks            - End timestamp
+ *              TimeElapsed         - Where the elapsed time is returned
+ *
+ * RETURN:      Status and TimeElapsed
+ *
+ * DESCRIPTION: Computes the time elapsed (in microseconds) between two
+ *              PM Timer time stamps, taking into account the possibility of
+ *              rollovers, the timer resolution, and timer frequency.
+ *
+ *              The PM Timer's clock ticks at roughly 3.6 times per
+ *              _microsecond_, and its clock continues through Cx state
+ *              transitions (unlike many CPU timestamp counters) -- making it
+ *              a versatile and accurate timer.
+ *
+ *              Note that this function accommodates only a single timer
+ *              rollover.  Thus for 24-bit timers, this function should only
+ *              be used for calculating durations less than ~4.6 seconds
+ *              (~20 minutes for 32-bit timers) -- calculations below:
+ *
+ *              2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec
+ *              2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiGetTimerDuration (
+    UINT32                  StartTicks,
+    UINT32                  EndTicks,
+    UINT32                  *TimeElapsed)
+{
+    ACPI_STATUS             Status;
+    UINT32                  DeltaTicks;
+    UINT64                  Quotient;
+
+
+    ACPI_FUNCTION_TRACE (AcpiGetTimerDuration);
+
+
+    if (!TimeElapsed)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    /*
+     * Compute Tick Delta:
+     * Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
+     */
+    if (StartTicks < EndTicks)
+    {
+        DeltaTicks = EndTicks - StartTicks;
+    }
+    else if (StartTicks > EndTicks)
+    {
+        if ((AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
+        {
+            /* 24-bit Timer */
+
+            DeltaTicks = (((0x00FFFFFF - StartTicks) + EndTicks) & 0x00FFFFFF);
+        }
+        else
+        {
+            /* 32-bit Timer */
+
+            DeltaTicks = (0xFFFFFFFF - StartTicks) + EndTicks;
+        }
+    }
+    else /* StartTicks == EndTicks */
+    {
+        *TimeElapsed = 0;
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /*
+     * Compute Duration (Requires a 64-bit multiply and divide):
+     *
+     * TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY;
+     */
+    Status = AcpiUtShortDivide (((UINT64) DeltaTicks) * 1000000,
+                PM_TIMER_FREQUENCY, &Quotient, NULL);
+
+    *TimeElapsed = (UINT32) Quotient;
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiGetTimerDuration)
+
+#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/source/components/hardware/hwvalid.c b/source/components/hardware/hwvalid.c
new file mode 100644
index 000000000000..4462434bbfe6
--- /dev/null
+++ b/source/components/hardware/hwvalid.c
@@ -0,0 +1,368 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwvalid - I/O request validation
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#define __HWVALID_C__
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwvalid")
+
+/* Local prototypes */
+
+static ACPI_STATUS
+AcpiHwValidateIoRequest (
+    ACPI_IO_ADDRESS         Address,
+    UINT32                  BitWidth);
+
+
+/*
+ * Protected I/O ports. Some ports are always illegal, and some are
+ * conditionally illegal. This table must remain ordered by port address.
+ *
+ * The table is used to implement the Microsoft port access rules that
+ * first appeared in Windows XP. Some ports are always illegal, and some
+ * ports are only illegal if the BIOS calls _OSI with a WinXP string or
+ * later (meaning that the BIOS itelf is post-XP.)
+ *
+ * This provides ACPICA with the desired port protections and
+ * Microsoft compatibility.
+ *
+ * Description of port entries:
+ *  DMA:   DMA controller
+ *  PIC0:  Programmable Interrupt Controller (8259A)
+ *  PIT1:  System Timer 1
+ *  PIT2:  System Timer 2 failsafe
+ *  RTC:   Real-time clock
+ *  CMOS:  Extended CMOS
+ *  DMA1:  DMA 1 page registers
+ *  DMA1L: DMA 1 Ch 0 low page
+ *  DMA2:  DMA 2 page registers
+ *  DMA2L: DMA 2 low page refresh
+ *  ARBC:  Arbitration control
+ *  SETUP: Reserved system board setup
+ *  POS:   POS channel select
+ *  PIC1:  Cascaded PIC
+ *  IDMA:  ISA DMA
+ *  ELCR:  PIC edge/level registers
+ *  PCI:   PCI configuration space
+ */
+static const ACPI_PORT_INFO     AcpiProtectedPorts[] =
+{
+    {"DMA",     0x0000, 0x000F, ACPI_OSI_WIN_XP},
+    {"PIC0",    0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
+    {"PIT1",    0x0040, 0x0043, ACPI_OSI_WIN_XP},
+    {"PIT2",    0x0048, 0x004B, ACPI_OSI_WIN_XP},
+    {"RTC",     0x0070, 0x0071, ACPI_OSI_WIN_XP},
+    {"CMOS",    0x0074, 0x0076, ACPI_OSI_WIN_XP},
+    {"DMA1",    0x0081, 0x0083, ACPI_OSI_WIN_XP},
+    {"DMA1L",   0x0087, 0x0087, ACPI_OSI_WIN_XP},
+    {"DMA2",    0x0089, 0x008B, ACPI_OSI_WIN_XP},
+    {"DMA2L",   0x008F, 0x008F, ACPI_OSI_WIN_XP},
+    {"ARBC",    0x0090, 0x0091, ACPI_OSI_WIN_XP},
+    {"SETUP",   0x0093, 0x0094, ACPI_OSI_WIN_XP},
+    {"POS",     0x0096, 0x0097, ACPI_OSI_WIN_XP},
+    {"PIC1",    0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
+    {"IDMA",    0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
+    {"ELCR",    0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
+    {"PCI",     0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP}
+};
+
+#define ACPI_PORT_INFO_ENTRIES  ACPI_ARRAY_LENGTH (AcpiProtectedPorts)
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwValidateIoRequest
+ *
+ * PARAMETERS:  Address             Address of I/O port/register
+ *              BitWidth            Number of bits (8,16,32)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validates an I/O request (address/length). Certain ports are
+ *              always illegal and some ports are only illegal depending on
+ *              the requests the BIOS AML code makes to the predefined
+ *              _OSI method.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwValidateIoRequest (
+    ACPI_IO_ADDRESS         Address,
+    UINT32                  BitWidth)
+{
+    UINT32                  i;
+    UINT32                  ByteWidth;
+    ACPI_IO_ADDRESS         LastAddress;
+    const ACPI_PORT_INFO    *PortInfo;
+
+
+    ACPI_FUNCTION_TRACE (HwValidateIoRequest);
+
+
+    /* Supported widths are 8/16/32 */
+
+    if ((BitWidth != 8) &&
+        (BitWidth != 16) &&
+        (BitWidth != 32))
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Bad BitWidth parameter: %8.8X", BitWidth));
+        return (AE_BAD_PARAMETER);
+    }
+
+    PortInfo = AcpiProtectedPorts;
+    ByteWidth = ACPI_DIV_8 (BitWidth);
+    LastAddress = Address + ByteWidth - 1;
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %p LastAddress %p Length %X",
+        ACPI_CAST_PTR (void, Address), ACPI_CAST_PTR (void, LastAddress),
+        ByteWidth));
+
+    /* Maximum 16-bit address in I/O space */
+
+    if (LastAddress > ACPI_UINT16_MAX)
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Illegal I/O port address/length above 64K: %p/0x%X",
+            ACPI_CAST_PTR (void, Address), ByteWidth));
+        return_ACPI_STATUS (AE_LIMIT);
+    }
+
+    /* Exit if requested address is not within the protected port table */
+
+    if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End)
+    {
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /* Check request against the list of protected I/O ports */
+
+    for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++)
+    {
+        /*
+         * Check if the requested address range will write to a reserved
+         * port. Four cases to consider:
+         *
+         * 1) Address range is contained completely in the port address range
+         * 2) Address range overlaps port range at the port range start
+         * 3) Address range overlaps port range at the port range end
+         * 4) Address range completely encompasses the port range
+         */
+        if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start))
+        {
+            /* Port illegality may depend on the _OSI calls made by the BIOS */
+
+            if (AcpiGbl_OsiData >= PortInfo->OsiDependency)
+            {
+                ACPI_DEBUG_PRINT ((ACPI_DB_IO,
+                    "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
+                    ACPI_CAST_PTR (void, Address), ByteWidth, PortInfo->Name,
+                    PortInfo->Start, PortInfo->End));
+
+                return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS);
+            }
+        }
+
+        /* Finished if address range ends before the end of this port */
+
+        if (LastAddress <= PortInfo->End)
+        {
+            break;
+        }
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwReadPort
+ *
+ * PARAMETERS:  Address             Address of I/O port/register to read
+ *              Value               Where value is placed
+ *              Width               Number of bits
+ *
+ * RETURN:      Status and value read from port
+ *
+ * DESCRIPTION: Read data from an I/O port or register. This is a front-end
+ *              to AcpiOsReadPort that performs validation on both the port
+ *              address and the length.
+ *
+ *****************************************************************************/
+
+ACPI_STATUS
+AcpiHwReadPort (
+    ACPI_IO_ADDRESS         Address,
+    UINT32                  *Value,
+    UINT32                  Width)
+{
+    ACPI_STATUS             Status;
+    UINT32                  OneByte;
+    UINT32                  i;
+
+
+    /* Truncate address to 16 bits if requested */
+
+    if (AcpiGbl_TruncateIoAddresses)
+    {
+        Address &= ACPI_UINT16_MAX;
+    }
+
+    /* Validate the entire request and perform the I/O */
+
+    Status = AcpiHwValidateIoRequest (Address, Width);
+    if (ACPI_SUCCESS (Status))
+    {
+        Status = AcpiOsReadPort (Address, Value, Width);
+        return (Status);
+    }
+
+    if (Status != AE_AML_ILLEGAL_ADDRESS)
+    {
+        return (Status);
+    }
+
+    /*
+     * There has been a protection violation within the request. Fall
+     * back to byte granularity port I/O and ignore the failing bytes.
+     * This provides Windows compatibility.
+     */
+    for (i = 0, *Value = 0; i < Width; i += 8)
+    {
+        /* Validate and read one byte */
+
+        if (AcpiHwValidateIoRequest (Address, 8) == AE_OK)
+        {
+            Status = AcpiOsReadPort (Address, &OneByte, 8);
+            if (ACPI_FAILURE (Status))
+            {
+                return (Status);
+            }
+
+            *Value |= (OneByte << i);
+        }
+
+        Address++;
+    }
+
+    return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwWritePort
+ *
+ * PARAMETERS:  Address             Address of I/O port/register to write
+ *              Value               Value to write
+ *              Width               Number of bits
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write data to an I/O port or register. This is a front-end
+ *              to AcpiOsWritePort that performs validation on both the port
+ *              address and the length.
+ *
+ *****************************************************************************/
+
+ACPI_STATUS
+AcpiHwWritePort (
+    ACPI_IO_ADDRESS         Address,
+    UINT32                  Value,
+    UINT32                  Width)
+{
+    ACPI_STATUS             Status;
+    UINT32                  i;
+
+
+    /* Truncate address to 16 bits if requested */
+
+    if (AcpiGbl_TruncateIoAddresses)
+    {
+        Address &= ACPI_UINT16_MAX;
+    }
+
+    /* Validate the entire request and perform the I/O */
+
+    Status = AcpiHwValidateIoRequest (Address, Width);
+    if (ACPI_SUCCESS (Status))
+    {
+        Status = AcpiOsWritePort (Address, Value, Width);
+        return (Status);
+    }
+
+    if (Status != AE_AML_ILLEGAL_ADDRESS)
+    {
+        return (Status);
+    }
+
+    /*
+     * There has been a protection violation within the request. Fall
+     * back to byte granularity port I/O and ignore the failing bytes.
+     * This provides Windows compatibility.
+     */
+    for (i = 0; i < Width; i += 8)
+    {
+        /* Validate and write one byte */
+
+        if (AcpiHwValidateIoRequest (Address, 8) == AE_OK)
+        {
+            Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8);
+            if (ACPI_FAILURE (Status))
+            {
+                return (Status);
+            }
+        }
+
+        Address++;
+    }
+
+    return (AE_OK);
+}
+
+
diff --git a/source/components/hardware/hwxface.c b/source/components/hardware/hwxface.c
new file mode 100644
index 000000000000..3fec9b566f05
--- /dev/null
+++ b/source/components/hardware/hwxface.c
@@ -0,0 +1,617 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwxface - Public ACPICA hardware interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#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.
+         */
+        Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
+                    AcpiGbl_FADT.ResetValue, ResetReg->BitWidth);
+    }
+    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)
+{
+    UINT32                  Value;
+    UINT32                  Width;
+    UINT64                  Address;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_NAME (AcpiRead);
+
+
+    if (!ReturnValue)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /* Validate contents of the GAS register. Allow 64-bit transfers */
+
+    Status = AcpiHwValidateRegister (Reg, 64, &Address);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /* Initialize entire 64-bit return value to zero */
+
+    *ReturnValue = 0;
+    Value = 0;
+
+    /*
+     * Two address spaces supported: Memory or IO. PCI_Config is
+     * not supported here because the GAS structure is insufficient
+     */
+    if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+    {
+        Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
+                    Address, ReturnValue, Reg->BitWidth);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+    else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+    {
+        Width = Reg->BitWidth;
+        if (Width == 64)
+        {
+            Width = 32; /* Break into two 32-bit transfers */
+        }
+
+        Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
+                    Address, &Value, Width);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+        *ReturnValue = Value;
+
+        if (Reg->BitWidth == 64)
+        {
+            /* Read the top 32 bits */
+
+            Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
+                        (Address + 4), &Value, 32);
+            if (ACPI_FAILURE (Status))
+            {
+                return (Status);
+            }
+            *ReturnValue |= ((UINT64) Value << 32);
+        }
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO,
+        "Read:  %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
+        ACPI_FORMAT_UINT64 (*ReturnValue), Reg->BitWidth,
+        ACPI_FORMAT_UINT64 (Address),
+        AcpiUtGetRegionName (Reg->SpaceId)));
+
+    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)
+{
+    UINT32                  Width;
+    UINT64                  Address;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_NAME (AcpiWrite);
+
+
+    /* Validate contents of the GAS register. Allow 64-bit transfers */
+
+    Status = AcpiHwValidateRegister (Reg, 64, &Address);
+    if (ACPI_FAILURE (Status))
+    {
+        return (Status);
+    }
+
+    /*
+     * Two address spaces supported: Memory or IO. PCI_Config is
+     * not supported here because the GAS structure is insufficient
+     */
+    if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+    {
+        Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
+                    Address, Value, Reg->BitWidth);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+    }
+    else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+    {
+        Width = Reg->BitWidth;
+        if (Width == 64)
+        {
+            Width = 32; /* Break into two 32-bit transfers */
+        }
+
+        Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
+                    Address, ACPI_LODWORD (Value), Width);
+        if (ACPI_FAILURE (Status))
+        {
+            return (Status);
+        }
+
+        if (Reg->BitWidth == 64)
+        {
+            Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
+                        (Address + 4), ACPI_HIDWORD (Value), 32);
+            if (ACPI_FAILURE (Status))
+            {
+                return (Status);
+            }
+        }
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_IO,
+        "Wrote: %8.8X%8.8X width %2d   to %8.8X%8.8X (%s)\n",
+        ACPI_FORMAT_UINT64 (Value), Reg->BitWidth,
+        ACPI_FORMAT_UINT64 (Address),
+        AcpiUtGetRegionName (Reg->SpaceId)));
+
+    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 automaticallly
+ *                                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 - ACPI status
+ *
+ * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
+ *              state.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiGetSleepTypeData (
+    UINT8                   SleepState,
+    UINT8                   *SleepTypeA,
+    UINT8                   *SleepTypeB)
+{
+    ACPI_STATUS             Status = AE_OK;
+    ACPI_EVALUATE_INFO      *Info;
+
+
+    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);
+    }
+
+    Info->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]);
+
+    /* Evaluate the namespace object containing the values for this state */
+
+    Status = AcpiNsEvaluate (Info);
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+            "%s while evaluating SleepState [%s]\n",
+            AcpiFormatException (Status), Info->Pathname));
+
+        goto Cleanup;
+    }
+
+    /* Must have a return object */
+
+    if (!Info->ReturnObject)
+    {
+        ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
+            Info->Pathname));
+        Status = AE_NOT_EXIST;
+    }
+
+    /* It must be of type Package */
+
+    else 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;
+    }
+
+    /*
+     * The package must have at least two elements. NOTE (March 2005): This
+     * goes against the current ACPI spec which defines this object as a
+     * package with one encoded DWORD element. However, existing practice
+     * by BIOS vendors seems to be to have 2 or more elements, at least
+     * one per sleep type (A/B).
+     */
+    else if (Info->ReturnObject->Package.Count < 2)
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Sleep State return package does not have at least two elements"));
+        Status = AE_AML_NO_OPERAND;
+    }
+
+    /* The first two elements must both be of type Integer */
+
+    else if (((Info->ReturnObject->Package.Elements[0])->Common.Type
+                != ACPI_TYPE_INTEGER) ||
+             ((Info->ReturnObject->Package.Elements[1])->Common.Type
+                != ACPI_TYPE_INTEGER))
+    {
+        ACPI_ERROR ((AE_INFO,
+            "Sleep State return package elements are not both Integers "
+            "(%s, %s)",
+            AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]),
+            AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1])));
+        Status = AE_AML_OPERAND_TYPE;
+    }
+    else
+    {
+        /* Valid _Sx_ package size, type, and value */
+
+        *SleepTypeA = (UINT8)
+            (Info->ReturnObject->Package.Elements[0])->Integer.Value;
+        *SleepTypeB = (UINT8)
+            (Info->ReturnObject->Package.Elements[1])->Integer.Value;
+    }
+
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "While evaluating SleepState [%s], bad Sleep object %p type %s",
+            Info->Pathname, Info->ReturnObject,
+            AcpiUtGetObjectTypeName (Info->ReturnObject)));
+    }
+
+    AcpiUtRemoveReference (Info->ReturnObject);
+
+Cleanup:
+    ACPI_FREE (Info);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
diff --git a/source/components/hardware/hwxfsleep.c b/source/components/hardware/hwxfsleep.c
new file mode 100644
index 000000000000..39bf122a072e
--- /dev/null
+++ b/source/components/hardware/hwxfsleep.c
@@ -0,0 +1,474 @@
+/******************************************************************************
+ *
+ * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * 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 MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwxfsleep")
+
+/* Local prototypes */
+
+static ACPI_STATUS
+AcpiHwSleepDispatch (
+    UINT8                   SleepState,
+    UINT32                  FunctionId);
+
+/*
+ * Dispatch table used to efficiently branch to the various sleep
+ * functions.
+ */
+#define ACPI_SLEEP_FUNCTION_ID          0
+#define ACPI_WAKE_PREP_FUNCTION_ID      1
+#define ACPI_WAKE_FUNCTION_ID           2
+
+/* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
+
+static ACPI_SLEEP_FUNCTIONS         AcpiSleepDispatch[] =
+{
+    {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacySleep),    AcpiHwExtendedSleep},
+    {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWakePrep), AcpiHwExtendedWakePrep},
+    {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWake),     AcpiHwExtendedWake}
+};
+
+
+/*
+ * These functions are removed for the ACPI_REDUCED_HARDWARE case:
+ *      AcpiSetFirmwareWakingVector
+ *      AcpiSetFirmwareWakingVector64
+ *      AcpiEnterSleepStateS4bios
+ */
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiSetFirmwareWakingVector
+ *
+ * PARAMETERS:  PhysicalAddress     - 32-bit physical address of ACPI real mode
+ *                                    entry point.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiSetFirmwareWakingVector (
+    UINT32                  PhysicalAddress)
+{
+    ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector);
+
+
+    /* Set the 32-bit vector */
+
+    AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress;
+
+    /* Clear the 64-bit vector if it exists */
+
+    if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1))
+    {
+        AcpiGbl_FACS->XFirmwareWakingVector = 0;
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector)
+
+
+#if ACPI_MACHINE_WIDTH == 64
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiSetFirmwareWakingVector64
+ *
+ * PARAMETERS:  PhysicalAddress     - 64-bit physical address of ACPI protected
+ *                                    mode entry point.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if
+ *              it exists in the table. This function is intended for use with
+ *              64-bit host operating systems.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiSetFirmwareWakingVector64 (
+    UINT64                  PhysicalAddress)
+{
+    ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64);
+
+
+    /* Determine if the 64-bit vector actually exists */
+
+    if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1))
+    {
+        return_ACPI_STATUS (AE_NOT_EXIST);
+    }
+
+    /* Clear 32-bit vector, set the 64-bit X_ vector */
+
+    AcpiGbl_FACS->FirmwareWakingVector = 0;
+    AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress;
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64)
+#endif
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEnterSleepStateS4bios
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform a S4 bios request.
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEnterSleepStateS4bios (
+    void)
+{
+    UINT32                  InValue;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios);
+
+
+    /* Clear the wake status bit (PM1) */
+
+    Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    Status = AcpiHwClearAcpiStatus ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * 1) Disable/Clear all GPEs
+     * 2) Enable all wakeup GPEs
+     */
+    Status = AcpiHwDisableAllGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+    AcpiGbl_SystemAwakeAndRunning = FALSE;
+
+    Status = AcpiHwEnableAllWakeupGpes ();
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    ACPI_FLUSH_CPU_CACHE ();
+
+    Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
+                (UINT32) AcpiGbl_FADT.S4BiosRequest, 8);
+
+    do {
+        AcpiOsStall(1000);
+        Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+    } while (!InValue);
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios)
+
+#endif /* !ACPI_REDUCED_HARDWARE */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwSleepDispatch
+ *
+ * PARAMETERS:  SleepState          - Which sleep state to enter/exit
+ *              FunctionId          - Sleep, WakePrep, or Wake
+ *
+ * RETURN:      Status from the invoked sleep handling function.
+ *
+ * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
+ *              function.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiHwSleepDispatch (
+    UINT8                   SleepState,
+    UINT32                  FunctionId)
+{
+    ACPI_STATUS             Status;
+    ACPI_SLEEP_FUNCTIONS    *SleepFunctions = &AcpiSleepDispatch[FunctionId];
+
+
+#if (!ACPI_REDUCED_HARDWARE)
+
+    /*
+     * If the Hardware Reduced flag is set (from the FADT), we must
+     * use the extended sleep registers
+     */
+    if (AcpiGbl_ReducedHardware ||
+        AcpiGbl_FADT.SleepControl.Address)
+    {
+        Status = SleepFunctions->ExtendedFunction (SleepState);
+    }
+    else
+    {
+        /* Legacy sleep */
+
+        Status = SleepFunctions->LegacyFunction (SleepState);
+    }
+
+    return (Status);
+
+#else
+    /*
+     * For the case where reduced-hardware-only code is being generated,
+     * we know that only the extended sleep registers are available
+     */
+    Status = SleepFunctions->ExtendedFunction (SleepState);
+    return (Status);
+
+#endif /* !ACPI_REDUCED_HARDWARE */
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEnterSleepStatePrep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Prepare to enter a system sleep state.
+ *              This function must execute with interrupts enabled.
+ *              We break sleeping into 2 stages so that OSPM can handle
+ *              various OS-specific tasks between the two steps.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEnterSleepStatePrep (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+    ACPI_OBJECT_LIST        ArgList;
+    ACPI_OBJECT             Arg;
+    UINT32                  SstValue;
+
+
+    ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);
+
+
+    /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
+
+    Status = AcpiGetSleepTypeData (SleepState,
+                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Execute the _PTS method (Prepare To Sleep) */
+
+    ArgList.Count = 1;
+    ArgList.Pointer = &Arg;
+    Arg.Type = ACPI_TYPE_INTEGER;
+    Arg.Integer.Value = SleepState;
+
+    Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL);
+    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Setup the argument to the _SST method (System STatus) */
+
+    switch (SleepState)
+    {
+    case ACPI_STATE_S0:
+        SstValue = ACPI_SST_WORKING;
+        break;
+
+    case ACPI_STATE_S1:
+    case ACPI_STATE_S2:
+    case ACPI_STATE_S3:
+        SstValue = ACPI_SST_SLEEPING;
+        break;
+
+    case ACPI_STATE_S4:
+        SstValue = ACPI_SST_SLEEP_CONTEXT;
+        break;
+
+    default:
+        SstValue = ACPI_SST_INDICATOR_OFF; /* Default is off */
+        break;
+    }
+
+    /*
+     * Set the system indicators to show the desired sleep state.
+     * _SST is an optional method (return no error if not found)
+     */
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, SstValue);
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEnterSleepState
+ *
+ * PARAMETERS:  SleepState          - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEnterSleepState (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiEnterSleepState);
+
+
+    if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
+        (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
+    {
+        ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
+            AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
+        return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
+    }
+
+    Status = AcpiHwSleepDispatch (SleepState, ACPI_SLEEP_FUNCTION_ID);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiEnterSleepState)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiLeaveSleepStatePrep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state we are exiting
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
+ *              sleep. Called with interrupts DISABLED.
+ *              We break wake/resume into 2 stages so that OSPM can handle
+ *              various OS-specific tasks between the two steps.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiLeaveSleepStatePrep (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiLeaveSleepStatePrep);
+
+
+    Status = AcpiHwSleepDispatch (SleepState, ACPI_WAKE_PREP_FUNCTION_ID);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiLeaveSleepStatePrep)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiLeaveSleepState
+ *
+ * PARAMETERS:  SleepState          - Which sleep state we are exiting
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiLeaveSleepState (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);
+
+
+    Status = AcpiHwSleepDispatch (SleepState, ACPI_WAKE_FUNCTION_ID);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState)