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      1 /*	$NetBSD: bootinfo.h,v 1.1 2014/02/24 07:23:43 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jonathan Stone, Michael Hitch and Simon Burge.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <machine/bootinfo.h>
     33 
     34 #define BOOTINFO_MAXSIZE 1024
     35 #define BOOTINFO_DATASIZE (BOOTINFO_MAXSIZE - 2 * sizeof(int))
     36 
     37 /*
     38  * Structure that holds the information passed by the boot loader.
     39  */
     40 struct bootinfo {
     41 	int	bi_nentries;	/* Number of bootinfo_* entries in bi_data. */
     42 	int	bi_offset;	/* Offset into bi_data for next bootinfo_* */
     43 
     44 	/* Raw data of bootinfo entries.  The first one (if any) is
     45 	 * found at &bi_data[0] and can be cast to (bootinfo_common *).
     46 	 * Once this is done, the following entry is found at 'len'
     47 	 * offset as specified by the previous entry. */
     48 	char	bi_data[BOOTINFO_DATASIZE];
     49 };
     50 
     51 extern struct bootinfo bootinfo;
     52 
     53 #define	BI_ADD(x, type, size) bi_add((struct btinfo_common *)(x), type, size)
     54 
     55 void	bi_init(void);
     56 void	bi_add(struct btinfo_common *, int, size_t);
     57