bootmain.c revision 1.5
1 /* $NetBSD: bootmain.c,v 1.5 2020/08/14 02:51:48 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994 Takumi Nakamura. 5 * Copyright (c) 1999, 2000 Itoh Yasufumi. 6 * Copyright (c) 2001 Minoura Makoto. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Takumi Nakamura. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/types.h> 38 #include <machine/bootinfo.h> 39 #include <lib/libsa/stand.h> 40 #include <lib/libsa/loadfile.h> 41 42 #include "libx68k.h" 43 #include "iocs.h" 44 #include "exec_image.h" 45 46 #define EXSCSI_BDID ((void *)0x00ea0001) 47 #define BINF_ISFD(pbinf) (*((uint8_t *)(pbinf) + 1) == 0) 48 49 /* boot.S */ 50 extern int badbaddr(volatile void *); 51 extern unsigned int ID; /* target SCSI ID */ 52 extern unsigned int BOOT_INFO; /* result of IOCS(__BOOTINF) */ 53 extern struct { 54 struct fdfmt{ 55 uint8_t N; /* sector length 0: 128, ..., 3: 1K */ 56 uint8_t C; /* cylinder # */ 57 uint8_t H; /* head # */ 58 uint8_t R; /* sector # */ 59 } minsec, maxsec; 60 } FDSECMINMAX; /* FD format type of the first track */ 61 62 /* for debug */ 63 unsigned int startregs[16]; 64 65 static int get_scsi_host_adapter(char *); 66 void bootmain(void) __attribute__ ((__noreturn__)); 67 68 /* 69 * Check the type of SCSI interface 70 */ 71 static int 72 get_scsi_host_adapter(char *devstr) 73 { 74 uint8_t *bootrom; 75 int ha; 76 77 #ifdef XXBOOT_DEBUG 78 *(uint32_t *)(devstr + 0) = '/' << 24 | 's' << 16 | 'p' << 8 | 'c'; 79 #if defined(CDBOOT) 80 *(uint32_t *)(devstr + 4) = '@' << 24 | '0' << 16 | '/' << 8 | 'c'; 81 #else 82 *(uint32_t *)(devstr + 4) = '@' << 24 | '0' << 16 | '/' << 8 | 's'; 83 #endif 84 *(uint32_t *)(devstr + 8) = 'd' << 24 | '@' << 16 | '0' << 8 | ','; 85 *(uint32_t *)(devstr + 12) = '0' << 24 | ':' << 16 | 'a' << 8 | '\0'; 86 #endif 87 88 bootrom = (uint8_t *)(BOOT_INFO & 0x00ffffe0); 89 /* 90 * bootrom+0x24 "SCSIIN" ... Internal SCSI (spc@0) 91 * "SCSIEX" ... External SCSI (spc@1 or mha@0) 92 */ 93 if (*(uint16_t *)(bootrom + 0x24 + 4) == 0x494e) { /* "IN" */ 94 ha = (X68K_BOOT_SCSIIF_SPC << 4) | 0; 95 } else if (badbaddr(EXSCSI_BDID)) { 96 ha = (X68K_BOOT_SCSIIF_MHA << 4) | 0; 97 #ifdef XXBOOT_DEBUG 98 *(uint32_t *)devstr = '/' << 24 | 'm' << 16 | 'h' << 8 | 'a'; 99 #endif 100 } else { 101 ha = (X68K_BOOT_SCSIIF_SPC << 4) | 1; 102 #ifdef XXBOOT_DEBUG 103 devstr[5] = '1'; 104 #endif 105 } 106 107 return ha; 108 } 109 110 extern const char bootprog_name[], bootprog_rev[]; 111 112 void 113 bootmain(void) 114 { 115 int bootdev, ha, fd; 116 char bootdevstr[16]; 117 u_long marks[MARK_MAX]; 118 119 IOCS_B_PRINT(bootprog_name); 120 IOCS_B_PRINT(" rev."); 121 IOCS_B_PRINT(bootprog_rev); 122 IOCS_B_PRINT("\r\n"); 123 124 ha = get_scsi_host_adapter(bootdevstr); 125 #ifdef XXBOOT_DEBUG 126 bootdevstr[10] = '0' + (ID & 7); 127 bootdevstr[14] = 'a'; 128 #endif 129 130 #if defined(CDBOOT) 131 bootdev = X68K_MAKESCSIBOOTDEV(X68K_MAJOR_CD, ha >> 4, ha & 15, 132 ID & 7, 0, 0); 133 #elif defined(FDBOOT) || defined(SDBOOT) 134 if (BINF_ISFD(&BOOT_INFO)) { 135 /* floppy */ 136 #ifdef XXBOOT_DEBUG 137 *(uint32_t *)bootdevstr = 138 ('f' << 24) | ('d' << 16) | ('@' << 8) | 139 ('0' + (BOOT_INFO & 3)); 140 bootdevstr[4] = '\0'; 141 #endif 142 /* fdNa for 1024 bytes/sector, fdNc for 512 bytes/sector */ 143 bootdev = X68K_MAKEBOOTDEV(X68K_MAJOR_FD, BOOT_INFO & 3, 144 (FDSECMINMAX.minsec.N == 3) ? 0 : 2); 145 } else { 146 /* SCSI */ 147 bootdev = X68K_MAKESCSIBOOTDEV(X68K_MAJOR_SD, ha >> 4, ha & 15, 148 ID & 7, 0, 0 /* XXX: assume partition a */); 149 } 150 #else 151 bootdev = 0; 152 #endif 153 154 #ifdef XXBOOT_DEBUG 155 IOCS_B_PRINT("boot device: "); 156 IOCS_B_PRINT(bootdevstr); 157 #endif 158 IOCS_B_PRINT("\r\n"); 159 160 marks[MARK_START] = BOOT_TEXTADDR; 161 fd = loadfile("x68k/boot", marks, LOAD_TEXT|LOAD_DATA|LOAD_BSS); 162 if (fd < 0) 163 fd = loadfile("boot", marks, LOAD_TEXT|LOAD_DATA|LOAD_BSS); 164 if (fd >= 0) { 165 close(fd); 166 exec_image(BOOT_TEXTADDR, /* image loaded at */ 167 BOOT_TEXTADDR, /* image executed at */ 168 BOOT_TEXTADDR, /* XXX: entry point */ 169 0, /* XXX: image size */ 170 bootdev, 0); /* arguments */ 171 } 172 IOCS_B_PRINT("can't load the secondary bootstrap."); 173 exit(0); 174 } 175 176 int 177 devopen(struct open_file *f, const char *fname, char **file) 178 { 179 180 *file = __UNCONST(fname); 181 return xxopen(f); 182 } 183
Indexes created Sat Sep 27 22:09:54 GMT 2025