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

     /*      $NetBSD: openfirmio.h,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
     
     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This software was developed by the Computer Systems Engineering group
     * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     * contributed to Berkeley.
     *
     * 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.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     *
     *      @(#)openpromio.h        8.1 (Berkeley) 6/11/93
     *
     * $FreeBSD$
     */
    
    #ifndef _DEV_OFW_OPENFIRMIO_H_
    #define _DEV_OFW_OPENFIRMIO_H_
    
    #include <dev/ofw/openfirm.h>
    
    struct ofiocdesc {
            phandle_t       of_nodeid;      /* passed or returned node id */
            int             of_namelen;     /* length of of_name */
            const char      *of_name;       /* pointer to field name */
            int             of_buflen;      /* length of of_buf (value-result) */
            char            *of_buf;        /* pointer to field value */
    };
    
    #define OFIOC_BASE      'O'
    
    /* Get openprom field. */
    #define OFIOCGET        _IOWR(OFIOC_BASE, 1, struct ofiocdesc)
    /* Set openprom field. */
    #define OFIOCSET        _IOWR(OFIOC_BASE, 2, struct ofiocdesc)
    /* Get next property. */
    #define OFIOCNEXTPROP   _IOWR(OFIOC_BASE, 3, struct ofiocdesc)
    /* Get options node. */
    #define OFIOCGETOPTNODE _IOR(OFIOC_BASE, 4, phandle_t)
    /* Get next node of node. */
    #define OFIOCGETNEXT    _IOWR(OFIOC_BASE, 5, phandle_t)
    /* Get first child of node. */
    #define OFIOCGETCHILD   _IOWR(OFIOC_BASE, 6, phandle_t)
    /* Find a specific device. */
    #define OFIOCFINDDEVICE _IOWR(OFIOC_BASE, 7, struct ofiocdesc)
    /* Retrieve the size of a property. */
    #define OFIOCGETPROPLEN _IOWR(OFIOC_BASE, 8, struct ofiocdesc)
    
    /* Maximum accepted name length. */
    #define OFIOCMAXNAME    8191
    /* Maximum accepted value length (maximum of nvramrc property). */
    #define OFIOCMAXVALUE   8192
    
    /*
     * While IEEE 1275-1994 states in 3.2.2.1.1 that property names are 1-31
     * printable characters, in practice, this limit has been ignored.
     * Noncompliant properties have been codified in standards such as LoPAPR.
     *
     * This is a suggested buffer length that should be large enough to hold
     * any property name currently seen in device trees, without being overly
     * wasteful of memory.
     *
     * If a future version of the Devicetree specification updates the property
     * names length requirement, this value will be updated to match.
     */
    #define OFIOCSUGGPROPNAMELEN    64
    
    #endif /* _DEV_OFW_OPENFIRMIO_H_ */

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