FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/Osd/OsdInterrupt.c

     /*-
      * Copyright (c) 2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * 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.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * 6.5 : Interrupt handling
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
     
    #include <contrib/dev/acpica/acpi.h>
    #include <dev/acpica/acpivar.h>
    
    #define _COMPONENT      ACPI_OS_SERVICES
    ACPI_MODULE_NAME("INTERRUPT")
    
    static UINT32           InterruptOverride = 0;
    
    ACPI_STATUS
    AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
        ACPI_OSD_HANDLER ServiceRoutine, void *Context)
    {
        struct acpi_softc   *sc;
    
        ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
    
        if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
            panic("can't find ACPI device to register interrupt");
        if (sc->acpi_dev == NULL)
            panic("acpi softc has invalid device");
    
        if (InterruptNumber < 0 || InterruptNumber > 255)
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        if (ServiceRoutine == NULL)
            return_ACPI_STATUS (AE_BAD_PARAMETER);
    
        /*
         * If the MADT contained an interrupt override directive for the SCI,
         * we use that value instead of the one from the FADT.
         */
        if (InterruptOverride != 0) {
                device_printf(sc->acpi_dev,
                    "Overriding SCI Interrupt from IRQ %u to IRQ %u\n",
                    InterruptNumber, InterruptOverride);
                InterruptNumber = InterruptOverride;
        }
    
        /* Set up the interrupt resource. */
        sc->acpi_irq_rid = 0;
        bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1);
        sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
            &sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
        if (sc->acpi_irq == NULL) {
            device_printf(sc->acpi_dev, "could not allocate interrupt\n");
            goto error;
        }
        if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC|INTR_MPSAFE,
            NULL, (driver_intr_t *)ServiceRoutine, Context, &sc->acpi_irq_handle)) {
            device_printf(sc->acpi_dev, "could not set up interrupt\n");
            goto error;
        }
    
        return_ACPI_STATUS (AE_OK);
    
    error:
        if (sc->acpi_irq_handle)
            bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
        sc->acpi_irq_handle = NULL;
       if (sc->acpi_irq)
           bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
       sc->acpi_irq = NULL;
       bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
   
       return_ACPI_STATUS (AE_ALREADY_EXISTS);
   }
   
   ACPI_STATUS
   AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
   {
       struct acpi_softc   *sc;
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       if (InterruptNumber < 0 || InterruptNumber > 255)
           return_ACPI_STATUS (AE_BAD_PARAMETER);
       if (ServiceRoutine == NULL)
           return_ACPI_STATUS (AE_BAD_PARAMETER);
   
       if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
           panic("can't find ACPI device to deregister interrupt");
   
       if (sc->acpi_irq == NULL)
           return_ACPI_STATUS (AE_NOT_EXIST);
   
       bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
       bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
       bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
   
       sc->acpi_irq = NULL;
   
       return_ACPI_STATUS (AE_OK);
   }
   
   ACPI_STATUS
   acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
   {
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       if (InterruptOverride != 0)
           return_ACPI_STATUS (AE_ALREADY_EXISTS);
       InterruptOverride = InterruptNumber;
       return_ACPI_STATUS (AE_OK);
   }

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