FreeBSD/Linux Kernel Cross Reference
sys/arm64/coresight/coresight_etm4x_acpi.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause
      *
      * Copyright (c) 2020 Ruslan Bukin <br@bsdpad.com>
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory (Department of Computer Science and
      * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
      * DARPA SSITH research programme.
     *
     * 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.
     */
    
    #include "opt_acpi.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/types.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/memdesc.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    #include <dev/acpica/acpivar.h>
    
    #include <arm64/coresight/coresight.h>
    #include <arm64/coresight/coresight_etm4x.h>
    
    static int
    etm_acpi_probe(device_t dev)
    {
            static char *etm_ids[] = { "ARMHC500", NULL };
            int error;
    
            error = ACPI_ID_PROBE(device_get_parent(dev), dev, etm_ids, NULL);
            if (error <= 0)
                    device_set_desc(dev, "ARM Embedded Trace Macrocell");
    
            return (error);
    }
    
    static int
    etm_acpi_attach(device_t dev)
    {
            struct etm_softc *sc;
    
            sc = device_get_softc(dev);
            sc->pdata = coresight_acpi_get_platform_data(dev);
    
            return (etm_attach(dev));
    }
    
    static device_method_t etm_acpi_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,                 etm_acpi_probe),
            DEVMETHOD(device_attach,                etm_acpi_attach),
    
            /* End */
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(etm, etm_acpi_driver, etm_acpi_methods,
        sizeof(struct etm_softc), etm_driver);
    
    EARLY_DRIVER_MODULE(etm, acpi, etm_acpi_driver, 0, 0,
        BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);

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