openfirmio.h (3773B) - Raw
1 /* $NetBSD: openfirmio.h,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)openpromio.h 8.1 (Berkeley) 6/11/93 38 */ 39 40 #ifndef _DEV_OFW_OPENFIRMIO_H_ 41 #define _DEV_OFW_OPENFIRMIO_H_ 42 43 #include <dev/ofw/openfirm.h> 44 45 struct ofiocdesc { 46 phandle_t of_nodeid; /* passed or returned node id */ 47 int of_namelen; /* length of of_name */ 48 const char *of_name; /* pointer to field name */ 49 int of_buflen; /* length of of_buf (value-result) */ 50 char *of_buf; /* pointer to field value */ 51 }; 52 53 #define OFIOC_BASE 'O' 54 55 /* Get openprom field. */ 56 #define OFIOCGET _IOWR(OFIOC_BASE, 1, struct ofiocdesc) 57 /* Set openprom field. */ 58 #define OFIOCSET _IOWR(OFIOC_BASE, 2, struct ofiocdesc) 59 /* Get next property. */ 60 #define OFIOCNEXTPROP _IOWR(OFIOC_BASE, 3, struct ofiocdesc) 61 /* Get options node. */ 62 #define OFIOCGETOPTNODE _IOR(OFIOC_BASE, 4, phandle_t) 63 /* Get next node of node. */ 64 #define OFIOCGETNEXT _IOWR(OFIOC_BASE, 5, phandle_t) 65 /* Get first child of node. */ 66 #define OFIOCGETCHILD _IOWR(OFIOC_BASE, 6, phandle_t) 67 /* Find a specific device. */ 68 #define OFIOCFINDDEVICE _IOWR(OFIOC_BASE, 7, struct ofiocdesc) 69 /* Retrieve the size of a property. */ 70 #define OFIOCGETPROPLEN _IOWR(OFIOC_BASE, 8, struct ofiocdesc) 71 72 /* Maximum accepted name length. */ 73 #define OFIOCMAXNAME 8191 74 /* Maximum accepted value length (maximum of nvramrc property). */ 75 #define OFIOCMAXVALUE 8192 76 77 /* 78 * While IEEE 1275-1994 states in 3.2.2.1.1 that property names are 1-31 79 * printable characters, in practice, this limit has been ignored. 80 * Noncompliant properties have been codified in standards such as LoPAPR. 81 * 82 * This is a suggested buffer length that should be large enough to hold 83 * any property name currently seen in device trees, without being overly 84 * wasteful of memory. 85 * 86 * If a future version of the Devicetree specification updates the property 87 * names length requirement, this value will be updated to match. 88 */ 89 #define OFIOCSUGGPROPNAMELEN 64 90 91 #endif /* _DEV_OFW_OPENFIRMIO_H_ */