FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/platformvar.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2005 Peter Grehan
      * 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_PLATFORMVAR_H_
    #define _MACHINE_PLATFORMVAR_H_
    
    /*
     * A PowerPC platform implementation is declared with a kernel object and
     * an associated method table, similar to a device driver.
     *
     * e.g.
     *
     * static platform_method_t chrp_methods[] = {
     *      PLATFORMMETHOD(platform_probe,          chrp_probe),
     *      PLATFORMMETHOD(platform_mem_regions,    ofw_mem_regions),
     *  ...
     *      PLATFORMMETHOD(platform_smp_first_cpu,  chrp_smp_first_cpu),
     *      { 0, 0 }
     * };
     *
     * static platform_def_t chrp_platform = {
     *      "chrp",
     *      chrp_methods,
     *      sizeof(chrp_platform_softc),    // or 0 if no softc
     * };
     *
     * PLATFORM_DEF(chrp_platform);
     */
    
    #include <sys/kobj.h>
    
    struct platform_kobj {
            /*
             * A platform instance is a kernel object
             */
            KOBJ_FIELDS;
    
            /*
             * Utility elements that an instance may use
             */
            struct mtx      platform_mtx;   /* available for instance use */
            void            *platform_iptr; /* instance data pointer */
    
            /*
             * Opaque data that can be overlaid with an instance-private
             * structure. Platform code can test that this is large enough at
             * compile time with a sizeof() test againt it's softc. There
             * is also a run-time test when the platform kernel object is
             * registered.
             */
    #define PLATFORM_OPAQUESZ       64
            u_int           platform_opaque[PLATFORM_OPAQUESZ];
    };
    
    typedef struct platform_kobj    *platform_t;
    typedef struct kobj_class       platform_def_t;
    #define platform_method_t       kobj_method_t
    
    #define PLATFORMMETHOD          KOBJMETHOD
    #define PLATFORMMETHOD_END      KOBJMETHOD_END
    
    #define PLATFORM_DEF(name)      DATA_SET(platform_set, name)
    
    #endif /* _MACHINE_PLATFORMVAR_H_ */

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