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bootinfo.c revision 1.1 
      1 /*	$NetBSD: bootinfo.c,v 1.1 1999/04/30 09:29:40 christos 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <machine/types.h>
     41 #include <lib/libsa/stand.h>
     42 #include <lib/libkern/libkern.h>
     43 
     44 #include "bootinfo.h"
     45 
     46 static char *bootinfo = NULL;
     47 static char *bi_next;
     48 static int bi_size;
     49 
     50 u_long
     51 bi_init(addr)
     52 	u_long addr;
     53 {
     54 	struct btinfo_common *bi;
     55 	struct btinfo_magic bi_magic;
     56 	u_long *endp;
     57 
     58 	endp = (u_long *)ALIGN(addr);
     59 	/*
     60 	 * For the first word we load our end address,
     61 	 * giving enough space for the bootinfo structure.
     62 	 */
     63 	endp[0] = (u_long)((char *)endp + BOOTINFO_SIZE);
     64 	bootinfo = (char *)ALIGN(&endp[2]);
     65 	endp[1] = (u_long)bootinfo;
     66 	bi = (struct btinfo_common *)bootinfo;
     67 	bi->next = bi->type = 0;
     68 	bi_next = bootinfo;
     69 	bi_size = 0;
     70 
     71 	bi_magic.magic = BOOTINFO_MAGIC;
     72 	bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
     73 	return (u_long) endp;
     74 }
     75 
     76 void
     77 bi_add(new, type, size)
     78 	void *new;
     79 	int type;
     80 	size_t size;
     81 {
     82 	struct btinfo_common *bi;
     83 
     84 	if (bi_size + size > BOOTINFO_SIZE)
     85 		return;				/* XXX error? */
     86 
     87 	bi = new;
     88 	bi->next = ALIGN(size);
     89 	bi->type = type;
     90 	memcpy(bi_next, new, size);
     91 	bi_next += ALIGN(size);
     92 
     93 	bi = (struct btinfo_common *)bi_next;
     94 	bi->next = bi->type = 0;
     95 }
     96