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diff --git a/sys/contrib/dev/acpica/components/events/evevent.c b/sys/contrib/dev/acpica/components/events/evevent.c
new file mode 100644
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--- /dev/null
+++ b/sys/contrib/dev/acpica/components/events/evevent.c
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+/******************************************************************************
+ *
+ * Module Name: evevent - Fixed Event handling and dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * 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 <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <contrib/dev/acpica/include/acevents.h>
+
+#define _COMPONENT          ACPI_EVENTS
+        ACPI_MODULE_NAME    ("evevent")
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+
+/* Local prototypes */
+
+static ACPI_STATUS
+AcpiEvFixedEventInitialize (
+    void);
+
+static UINT32
+AcpiEvFixedEventDispatch (
+    UINT32                  Event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInitializeEvents
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvInitializeEvents (
+    void)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (EvInitializeEvents);
+
+
+    /* If Hardware Reduced flag is set, there are no fixed events */
+
+    if (AcpiGbl_ReducedHardware)
+    {
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /*
+     * Initialize the Fixed and General Purpose Events. This is done prior to
+     * enabling SCIs to prevent interrupts from occurring before the handlers
+     * are installed.
+     */
+    Status = AcpiEvFixedEventInitialize ();
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Unable to initialize fixed events"));
+        return_ACPI_STATUS (Status);
+    }
+
+    Status = AcpiEvGpeInitialize ();
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Unable to initialize general purpose events"));
+        return_ACPI_STATUS (Status);
+    }
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInstallXruptHandlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvInstallXruptHandlers (
+    void)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);
+
+
+    /* If Hardware Reduced flag is set, there is no ACPI h/w */
+
+    if (AcpiGbl_ReducedHardware)
+    {
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /* Install the SCI handler */
+
+    Status = AcpiEvInstallSciHandler ();
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Unable to install System Control Interrupt handler"));
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Install the handler for the Global Lock */
+
+    Status = AcpiEvInitGlobalLockHandler ();
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Unable to initialize Global Lock handler"));
+        return_ACPI_STATUS (Status);
+    }
+
+    AcpiGbl_EventsInitialized = TRUE;
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvFixedEventInitialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiEvFixedEventInitialize (
+    void)
+{
+    UINT32                  i;
+    ACPI_STATUS             Status;
+
+
+    /*
+     * Initialize the structure that keeps track of fixed event handlers and
+     * enable the fixed events.
+     */
+    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
+    {
+        AcpiGbl_FixedEventHandlers[i].Handler = NULL;
+        AcpiGbl_FixedEventHandlers[i].Context = NULL;
+
+        /* Disable the fixed event */
+
+        if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
+        {
+            Status = AcpiWriteBitRegister (
+                        AcpiGbl_FixedEventInfo[i].EnableRegisterId,
+                        ACPI_DISABLE_EVENT);
+            if (ACPI_FAILURE (Status))
+            {
+                return (Status);
+            }
+        }
+    }
+
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvFixedEventDetect
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Checks the PM status register for active fixed events
+ *
+ ******************************************************************************/
+
+UINT32
+AcpiEvFixedEventDetect (
+    void)
+{
+    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
+    UINT32                  FixedStatus;
+    UINT32                  FixedEnable;
+    UINT32                  i;
+
+
+    ACPI_FUNCTION_NAME (EvFixedEventDetect);
+
+
+    /*
+     * Read the fixed feature status and enable registers, as all the cases
+     * depend on their values. Ignore errors here.
+     */
+    (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
+    (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
+        "Fixed Event Block: Enable %08X Status %08X\n",
+        FixedEnable, FixedStatus));
+
+    /*
+     * Check for all possible Fixed Events and dispatch those that are active
+     */
+    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
+    {
+        /* Both the status and enable bits must be on for this event */
+
+        if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
+            (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
+        {
+            /*
+             * Found an active (signalled) event. Invoke global event
+             * handler if present.
+             */
+            AcpiFixedEventCount[i]++;
+            if (AcpiGbl_GlobalEventHandler)
+            {
+                AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,
+                     i, AcpiGbl_GlobalEventHandlerContext);
+            }
+
+            IntStatus |= AcpiEvFixedEventDispatch (i);
+        }
+    }
+
+    return (IntStatus);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvFixedEventDispatch
+ *
+ * PARAMETERS:  Event               - Event type
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Clears the status bit for the requested event, calls the
+ *              handler that previously registered for the event.
+ *
+ ******************************************************************************/
+
+static UINT32
+AcpiEvFixedEventDispatch (
+    UINT32                  Event)
+{
+
+    ACPI_FUNCTION_ENTRY ();
+
+
+    /* Clear the status bit */
+
+    (void) AcpiWriteBitRegister (
+            AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
+            ACPI_CLEAR_STATUS);
+
+    /*
+     * Make sure we've got a handler. If not, report an error. The event is
+     * disabled to prevent further interrupts.
+     */
+    if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
+    {
+        (void) AcpiWriteBitRegister (
+                AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
+                ACPI_DISABLE_EVENT);
+
+        ACPI_ERROR ((AE_INFO,
+            "No installed handler for fixed event [0x%08X]",
+            Event));
+
+        return (ACPI_INTERRUPT_NOT_HANDLED);
+    }
+
+    /* Invoke the Fixed Event handler */
+
+    return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
+                AcpiGbl_FixedEventHandlers[Event].Context));
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */
+
+