1 /* $NetBSD: bootinfo.c,v 1.3 2009/03/14 15:36:14 dsl 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 <sys/param.h> 33 #include <machine/types.h> 34 #include <lib/libsa/stand.h> 35 #include <lib/libkern/libkern.h> 36 37 #include "bootinfo.h" 38 39 static char *bootinfo = NULL; 40 static char *bi_next; 41 static int bi_size; 42 43 u_long 44 bi_init(u_long addr) 45 { 46 struct btinfo_common *bi; 47 struct btinfo_magic bi_magic; 48 u_long *endp; 49 50 endp = (u_long *)ALIGN(addr); 51 /* 52 * For the first word we load our end address, 53 * giving enough space for the bootinfo structure. 54 */ 55 endp[0] = (u_long)((char *)endp + BOOTINFO_SIZE); 56 bootinfo = (char *)ALIGN(&endp[2]); 57 endp[1] = (u_long)bootinfo; 58 bi = (struct btinfo_common *)bootinfo; 59 bi->next = bi->type = 0; 60 bi_next = bootinfo; 61 bi_size = 0; 62 63 bi_magic.magic = BOOTINFO_MAGIC; 64 bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic)); 65 return (u_long) endp; 66 } 67 68 void 69 bi_add(void *new, int type, size_t size) 70 { 71 struct btinfo_common *bi; 72 73 if (bi_size + size > BOOTINFO_SIZE) 74 return; /* XXX error? */ 75 76 bi = new; 77 bi->next = ALIGN(size); 78 bi->type = type; 79 memcpy(bi_next, new, size); 80 bi_next += ALIGN(size); 81 82 bi = (struct btinfo_common *)bi_next; 83 bi->next = bi->type = 0; 84 } 85