1/* $NetBSD: mboot.c,v 1.9.8.1 2012/04/09 18:08:31 riz 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 Minoura Makoto. 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/types.h> 33#include <machine/disklabel.h> 34 35#include "iocs.h" 36 37int bootmain(int); 38 39#define PART_BOOTABLE 0 40#define PART_UNUSED 1 41#define PART_INUSE 2 42 43int 44bootmain(int scsiid) 45{ 46 struct iocs_readcap cap; 47 int size; 48 49 if (IOCS_BITSNS(0) & 1) /* ESC key */ 50 return 0; 51 52 if (IOCS_S_READCAP(scsiid, &cap) < 0) { 53 IOCS_B_PRINT(BOOT ": Error in reading.\r\n"); 54 return 0; 55 } 56 size = cap.size >> 9; 57 58 { 59 long *label = (void*) 0x3000; 60 if (IOCS_S_READ(0, 1, scsiid, size, label) < 0) { 61 IOCS_B_PRINT(BOOT ": Error in reading.\r\n"); 62 return 0; 63 } 64 if (label[0] != 0x58363853 || 65 label[1] != 0x43534931) { 66 IOCS_B_PRINT(BOOT ": Invalid disk.\r\n"); 67 return 0; 68 } 69 } 70 71 { 72 struct cpu_disklabel *label = (void*) 0x3000; 73 int i, firstinuse=-1; 74 unsigned char *t; 75 76 if (IOCS_S_READ(2<<(2-size), size?2:1, scsiid, size, label) < 0) { 77 IOCS_B_PRINT(BOOT ": Error in reading.\r\n"); 78 return 0; 79 } 80 t = label->dosparts[0].dp_typname; 81 if (t[0] != 'X' || t[1] != '6' || t[2] != '8' || t[3] != 'K') { 82 IOCS_B_PRINT(BOOT ": Invalid disk.\r\n"); 83 return 0; 84 } 85 86 for (i = 1; i < NDOSPART; i++) { 87 if (label->dosparts[i].dp_flag == PART_BOOTABLE) 88 break; 89 else if (label->dosparts[i].dp_flag == PART_INUSE) 90 firstinuse = i; 91 } 92 if (i >= NDOSPART && firstinuse >= 0) 93 i = firstinuse; 94 if (i < NDOSPART) { 95 unsigned int start = label->dosparts[i].dp_start; 96 unsigned int start1 = start << (2-size); 97 int r; 98 if ((start1 & 0x1fffff) == 0x1fffff) 99 r = IOCS_S_READ(start1, 100 8>>size, 101 scsiid, 102 size, 103 (void*) 0x2400); 104 else 105 r = IOCS_S_READEXT(start1, 106 8>>size, 107 scsiid, 108 size, 109 (void*) 0x2400); 110 if (r < 0) { 111 IOCS_B_PRINT(BOOT ": Error in reading.\r\n"); 112 return 0; 113 } 114 if (*((char*) 0x2400) != 0x60) { 115 IOCS_B_PRINT(BOOT ": Invalid disk.\r\n"); 116 return 0; 117 } 118 __asm volatile ("movl %0,%%d4\n\t" 119 "movl %1,%%d2\n\t" 120 "jsr 0x2400" 121 : 122 : "g" (scsiid), "g"(start) 123 : "d4"); 124 return 0; 125 } 126 IOCS_B_PRINT(BOOT ": No bootable partition.\r\n"); 127 return 0; 128 } 129 130 return 0; 131} 132