ofwvar.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2005 Peter Grehan
    5  * Copyright (c) 2008 Nathan Whitehorn
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD$
   30  */
   31 
   32 #ifndef _DEV_OFW_OFWVAR_H_
   33 #define _DEV_OFW_OFWVAR_H_
   34 
   35 /*
   36  * An Open Firmware client implementation is declared with a kernel object and
   37  * an associated method table, similar to a device driver.
   38  *
   39  * e.g.
   40  *
   41  * static ofw_method_t fdt_methods[] = {
   42  *      OFWMETHOD(ofw_init,             fdt_init),
   43  *      OFWMETHOD(ofw_finddevice,       fdt_finddevice),
   44  *  ...
   45  *      OFWMETHOD(ofw_nextprop,         fdt_nextprop),
   46  *      { 0, 0 }
   47  * };
   48  *
   49  * static ofw_def_t ofw_fdt = {
   50  *      "ofw_fdt",
   51  *      fdt_methods,
   52  *      sizeof(fdt_softc),      // or 0 if no softc
   53  * };
   54  *
   55  * OFW_DEF(ofw_fdt);
   56  */
   57 
   58 #include <sys/kobj.h>
   59 
   60 struct ofw_kobj {
   61         /*
   62          * An OFW instance is a kernel object.
   63          */
   64         KOBJ_FIELDS;
   65 
   66         /*
   67          * Utility elements that an instance may use
   68          */
   69         struct mtx      ofw_mtx;        /* available for instance use */
   70         void            *ofw_iptr;      /* instance data pointer */
   71 
   72         /*
   73          * Opaque data that can be overlaid with an instance-private
   74          * structure.  OFW code can test that this is large enough at
   75          * compile time with a sizeof() test againt it's softc.  There
   76          * is also a run-time test when the MMU kernel object is
   77          * registered.
   78          */
   79 #define OFW_OPAQUESZ    64
   80         u_int           ofw_opaque[OFW_OPAQUESZ];
   81 };
   82 
   83 typedef struct ofw_kobj         *ofw_t;
   84 typedef struct kobj_class       ofw_def_t;
   85 
   86 #define ofw_method_t    kobj_method_t
   87 #define OFWMETHOD       KOBJMETHOD
   88 
   89 #define OFW_DEF(name)   DATA_SET(ofw_set, name)
   90 
   91 #endif /* _DEV_OFW_OFWVAR_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/ofw/ofwvar.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/ofwvar.h