1 /* $NetBSD: bootxx.c,v 1.10 2005/12/11 12:19:29 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 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 /* 40 * This is a generic "first-stage" boot program. 41 * 42 * Note that this program has absolutely no filesystem knowledge! 43 * 44 * Instead, this uses a table of disk block numbers that are 45 * filled in by the installboot program such that this program 46 * can load the "second-stage" boot program. 47 */ 48 49 #include <sys/param.h> 50 #include <sys/bootblock.h> 51 #include <machine/mon.h> 52 53 #include <stand.h> 54 #include "libsa.h" 55 56 /* 57 * This is the address where we load the second-stage boot loader. 58 */ 59 #define LOADADDR 0x4000 60 61 /* 62 * The contents of the sun68k_bbinfo below are set by installboot(8) 63 * to hold the filesystem data of the second-stage boot program 64 * (typically `/ufsboot'): filesystem block size, # of filesystem 65 * blocks and the block numbers themselves. 66 */ 67 struct shared_bbinfo bbinfo = { 68 { SUN68K_BBINFO_MAGIC }, 69 0, 70 SHARED_BBINFO_MAXBLOCKS, 71 { 0 } 72 }; 73 74 int 75 main(void) 76 { 77 struct open_file f; 78 void *entry; 79 char *addr; 80 int n, error; 81 82 #ifdef DEBUG 83 printf("bootxx: open...\n"); 84 #endif 85 f.f_flags = F_RAW; 86 if (devopen(&f, 0, &addr)) { 87 putstr("bootxx: devopen failed\n"); 88 return; 89 } 90 91 addr = (char*)LOADADDR; 92 error = copyboot(&f, addr); 93 f.f_dev->dv_close(&f); 94 if (!error) { 95 #ifdef DEBUG 96 printf("bootxx: start 0x%x\n", (long)addr); 97 #endif 98 entry = addr; 99 chain_to(entry); 100 } 101 /* copyboot had a problem... */ 102 return; 103 } 104 105 int 106 copyboot(struct open_file *fp, char *addr) 107 { 108 int n, i, blknum; 109 char *buf; 110 111 /* Need to use a buffer that can be mapped into DVMA space. */ 112 buf = alloc(bbinfo.bbi_block_size); 113 if (!buf) 114 panic("bootxx: alloc failed"); 115 116 for (i = 0; i < bbinfo.bbi_block_count; i++) { 117 118 if ((blknum = bbinfo.bbi_block_table[i]) == 0) 119 break; 120 121 #ifdef DEBUG 122 printf("bootxx: block # %d = %d\n", i, blknum); 123 #endif 124 if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, blknum, 125 bbinfo.bbi_block_size, buf, &n)) 126 { 127 putstr("bootxx: read failed\n"); 128 return -1; 129 } 130 if (n != bbinfo.bbi_block_size) { 131 putstr("bootxx: short read\n"); 132 return -1; 133 } 134 memcpy(addr, buf, bbinfo.bbi_block_size); 135 addr += bbinfo.bbi_block_size; 136 } 137 138 return 0; 139 } 140