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      1 /*	$NetBSD: bootinfo.c,v 1.7 2010/01/10 09:34:45 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2000 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/types.h>
     33 #include <lib/libsa/stand.h>
     34 #include <lib/libkern/libkern.h>
     35 
     36 #include "boot.h"
     37 #include "bootinfo.h"
     38 
     39 static char *bootinfo = NULL;
     40 static char *bi_next;
     41 static int bi_size;
     42 
     43 char *
     44 bi_init(void)
     45 {
     46 	struct btinfo_common *bi;
     47 	struct btinfo_magic bi_magic;
     48 
     49 	if ((bootinfo = (char *)alloc(BOOTINFO_SIZE)) != NULL) {
     50 		bi = (struct btinfo_common *)bootinfo;
     51 		bi->next = bi->type = 0;
     52 		bi_next = bootinfo;
     53 		bi_size = 0;
     54 
     55 		bi_magic.magic = BOOTINFO_MAGIC;
     56 		bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
     57 	}
     58 
     59 	return bootinfo;
     60 }
     61 
     62 void bi_add(void *new, int type, int size)
     63 {
     64 	struct btinfo_common *bi;
     65 
     66 	if (bi_size + size > BOOTINFO_SIZE)
     67 		return;				/* XXX error? */
     68 
     69 	if (bootinfo != NULL) {
     70 		DPRINTF(("Adding %d of size %d @0x%lx\n",
     71 		    type, size, (u_long)bi_next));
     72 
     73 		bi = new;
     74 		bi->next = size;
     75 		bi->type = type;
     76 		memcpy(bi_next, new, size);
     77 		bi_next += size;
     78 
     79 		bi = (struct btinfo_common *)bi_next;
     80 		bi->next = bi->type = 0;
     81 
     82 		bi_size += size;
     83 	}
     84 }
     85