1 /* $NetBSD: bootxx.c,v 1.12 2009/01/12 07:00:59 tsutsui 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 * 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 /* 33 * This is a generic "first-stage" boot program. 34 * 35 * Note that this program has absolutely no filesystem knowledge! 36 * 37 * Instead, this uses a table of disk block numbers that are 38 * filled in by the installboot program such that this program 39 * can load the "second-stage" boot program. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/bootblock.h> 44 #include <machine/mon.h> 45 46 #include <stand.h> 47 #include "libsa.h" 48 49 int copyboot(struct open_file *, char *); 50 51 /* 52 * This is the address where we load the second-stage boot loader. 53 */ 54 #define LOADADDR 0x4000 55 56 /* 57 * The contents of the sun68k_bbinfo below are set by installboot(8) 58 * to hold the filesystem data of the second-stage boot program 59 * (typically `/ufsboot'): filesystem block size, # of filesystem 60 * blocks and the block numbers themselves. 61 */ 62 struct shared_bbinfo bbinfo = { 63 { SUN68K_BBINFO_MAGIC }, 64 0, 65 SHARED_BBINFO_MAXBLOCKS, 66 { 0 } 67 }; 68 69 int 70 main(void) 71 { 72 struct open_file f; 73 void *entry; 74 char *addr; 75 int error; 76 77 #ifdef DEBUG 78 printf("bootxx: open...\n"); 79 #endif 80 f.f_flags = F_RAW; 81 if (devopen(&f, 0, &addr)) { 82 putstr("bootxx: devopen failed\n"); 83 return 1; 84 } 85 86 addr = (char*)LOADADDR; 87 error = copyboot(&f, addr); 88 f.f_dev->dv_close(&f); 89 if (!error) { 90 #ifdef DEBUG 91 printf("bootxx: start 0x%x\n", (long)addr); 92 #endif 93 entry = addr; 94 chain_to(entry); 95 } 96 /* copyboot had a problem... */ 97 return 0; 98 } 99 100 int 101 copyboot(struct open_file *fp, char *addr) 102 { 103 size_t n; 104 int i, blknum; 105 char *buf; 106 107 /* Need to use a buffer that can be mapped into DVMA space. */ 108 buf = alloc(bbinfo.bbi_block_size); 109 if (!buf) 110 panic("bootxx: alloc failed"); 111 112 for (i = 0; i < bbinfo.bbi_block_count; i++) { 113 114 if ((blknum = bbinfo.bbi_block_table[i]) == 0) 115 break; 116 117 #ifdef DEBUG 118 printf("bootxx: block # %d = %d\n", i, blknum); 119 #endif 120 if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, blknum, 121 bbinfo.bbi_block_size, buf, &n)) 122 { 123 putstr("bootxx: read failed\n"); 124 return -1; 125 } 126 if (n != bbinfo.bbi_block_size) { 127 putstr("bootxx: short read\n"); 128 return -1; 129 } 130 memcpy(addr, buf, bbinfo.bbi_block_size); 131 addr += bbinfo.bbi_block_size; 132 } 133 134 return 0; 135 } 136