source: rtems-libbsd/freebsd/sys/dev/ofw/ofwvar.h @ c1205ee

/*-
 * Copyright (c) 2005 Peter Grehan
 * Copyright (c) 2008 Nathan Whitehorn
 * 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 _DEV_OFW_OFWVAR_H_
#define _DEV_OFW_OFWVAR_H_

/*
 * An Open Firmware client implementation is declared with a kernel object and
 * an associated method table, similar to a device driver.
 *
 * e.g.
 *
 * static ofw_method_t fdt_methods[] = {
 *      OFWMETHOD(ofw_init,             fdt_init),
 *      OFWMETHOD(ofw_finddevice,       fdt_finddevice),
 *  ...
 *      OFWMETHOD(ofw_nextprop,         fdt_nextprop),
 *      { 0, 0 }
 * };
 *
 * static ofw_def_t ofw_fdt = {
 *      "ofw_fdt",
 *      fdt_methods,
 *      sizeof(fdt_softc),      // or 0 if no softc
 * };
 *
 * OFW_DEF(ofw_fdt);
 */

#include <sys/kobj.h>

struct ofw_kobj {
        /*
         * An OFW instance is a kernel object.
         */
        KOBJ_FIELDS;

        /*
         * Utility elements that an instance may use
         */
        struct mtx      ofw_mtx;        /* available for instance use */
        void            *ofw_iptr;      /* instance data pointer */

        /*
         * Opaque data that can be overlaid with an instance-private
         * structure.  OFW 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 MMU kernel object is
         * registered.
         */
#define OFW_OPAQUESZ    64
        u_int           ofw_opaque[OFW_OPAQUESZ];
};

typedef struct ofw_kobj         *ofw_t;
typedef struct kobj_class       ofw_def_t;
#ifdef __rtems__
extern ofw_def_t ofw_fdt;
#endif /* __rtems__ */

#define ofw_method_t    kobj_method_t
#define OFWMETHOD       KOBJMETHOD

#define OFW_DEF(name)   DATA_SET(ofw_set, name)

#endif /* _DEV_OFW_OFWVAR_H_ */