bootmain.c revision 1.2
1 /* $NetBSD: bootmain.c,v 1.2 2001/10/15 16:13:40 minoura 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/reboot.h> 38 #include <sys/types.h> 39 #include <sys/exec_aout.h> 40 #include <ufs/ufs/dinode.h> 41 #include <ufs/ffs/fs.h> 42 #include <ufs/ufs/dir.h> 43 #include <machine/bootinfo.h> 44 #ifdef SCSI_ADHOC_BOOTPART 45 #include <machine/disklabel.h> 46 #endif 47 48 #include "boot_ufs.h" 49 #include "readufs.h" 50 #include "exec_image.h" 51 #include "../../x68k/iodevice.h" 52 #define IODEVbase ((volatile struct IODEVICE *)PHYS_IODEV) 53 54 /* for debug; */ 55 unsigned int startregs[16]; 56 57 #ifdef SCSI_ADHOC_BOOTPART 58 static int get_scsi_part (void); 59 #endif 60 #ifdef BOOT_DEBUG 61 static int get_scsi_host_adapter (char *); 62 #else 63 static int get_scsi_host_adapter (void); 64 #endif 65 66 #ifdef BOOT_DEBUG 67 void print_hex (unsigned int, int); 68 #endif 69 70 static int load_file (const char*, unsigned int, struct exec *); 71 static int load_file_ino (ino_t, const char*, unsigned int, struct exec *); 72 73 void bootufs (void) __attribute__ ((__noreturn__)); 74 75 #ifdef BOOT_DEBUG 76 void 77 print_hex(x, l) 78 unsigned int x; /* */ 79 int l; /* */ 80 { 81 82 if (l > 0) { 83 print_hex(x >> 4, l - 1); 84 x &= 0x0F; 85 if (x > 9) 86 x += 7; 87 B_PUTC((unsigned int) '0' + x); 88 } 89 } 90 #endif 91 92 #ifdef SCSI_ADHOC_BOOTPART 93 /* 94 * get partition # from partition start position 95 */ 96 97 #define NPART 15 98 #define PARTTBL_TOP ((unsigned)4) /* pos of part inf in 512byte-blocks */ 99 #define MAXPART 6 100 const unsigned char partition_conv[MAXPART + 1] = { 0, 1, 3, 4, 5, 6, 7 }; 101 102 static int 103 get_scsi_part() 104 { 105 struct { 106 u_int32_t magic; /* 0x5836384B ("X68K") */ 107 u_int32_t parttotal; 108 u_int32_t diskblocks; 109 u_int32_t diskblocks2; /* backup? */ 110 struct dos_partition parttbl[NPART]; 111 unsigned char formatstr[256]; 112 unsigned char rest[512]; 113 } partbuf; 114 int i; 115 u_int32_t part_top; 116 117 #ifdef BOOT_DEBUG 118 B_PRINT("seclen: "); 119 print_hex(SCSI_BLKLEN, 8); /* 0: 256, 1: 512, 2: 1024 */ 120 B_PRINT(", topsec: "); 121 print_hex(SCSI_PARTTOP, 8); /* partition top in sector */ 122 #endif 123 /* 124 * read partition table 125 */ 126 RAW_READ0(&partbuf, PARTTBL_TOP, sizeof partbuf); 127 128 part_top = SCSI_PARTTOP >> (2 - SCSI_BLKLEN); 129 for (i = 0; i < MAXPART; i++) 130 if ((u_int32_t) partbuf.parttbl[i].dp_start == part_top) 131 goto found; 132 133 BOOT_ERROR("Can't boot from this partition"); 134 /* NOTREACHED */ 135 found: 136 #ifdef BOOT_DEBUG 137 B_PRINT("; sd"); 138 B_PUTC(ID + '0'); /* SCSI ID (not NetBSD unit #) */ 139 B_PUTC((unsigned int) partition_conv[i] + 'a'); 140 B_PRINT("\r\n"); 141 #endif 142 return partition_conv[i]; 143 } 144 #endif /* SCSI_ADHOC_BOOTPART */ 145 146 /* 147 * Check the type of SCSI interface 148 */ 149 #ifdef BOOT_DEBUG 150 static int 151 get_scsi_host_adapter(devstr) 152 char *devstr; 153 #else 154 static int 155 get_scsi_host_adapter(void) 156 #endif 157 { 158 char *bootrom; 159 int ha; 160 161 #ifdef BOOT_DEBUG 162 B_PRINT(" at "); 163 *(int *)devstr = '/' << 24 | 's' << 16 | 'p' << 8 | 'c'; 164 *(int *)(devstr + 4) = '@' << 24 | '0' << 16 | '/' << 8 | 's'; 165 *(int *)(devstr + 8) = 'd' << 24 | '@' << 16 | '0' << 8 | ','; 166 *(int *)(devstr + 12) = '0' << 24 | ':' << 16 | 'a' << 8 | '\0'; 167 #endif 168 169 bootrom = (char *) (BOOT_INFO & 0x00ffffe0); 170 /* 171 * bootrom+0x24 "SCSIIN" ... Internal SCSI (spc@0) 172 * "SCSIEX" ... External SCSI (spc@1 or mha@0) 173 */ 174 if (*(u_short *)(bootrom + 0x24 + 4) == 0x494e) { /* "IN" */ 175 #ifdef BOOT_DEBUG 176 B_PRINT("spc0"); 177 #endif 178 ha = (X68K_BOOT_SCSIIF_SPC << 4) | 0; 179 } else if (badbaddr(&IODEVbase->io_exspc.bdid)) { 180 #ifdef BOOT_DEBUG 181 B_PRINT("mha0"); 182 #endif 183 ha = (X68K_BOOT_SCSIIF_MHA << 4) | 0; 184 #ifdef BOOT_DEBUG 185 *(int *)devstr = '/' << 24 | 'm' << 16 | 'h' << 8 | 'a'; 186 #endif 187 } else { 188 #ifdef BOOT_DEBUG 189 B_PRINT("spc1"); 190 #endif 191 ha = (X68K_BOOT_SCSIIF_SPC << 4) | 1; 192 #ifdef BOOT_DEBUG 193 devstr[5] = '1'; 194 #endif 195 } 196 197 return ha; 198 } 199 200 static int 201 load_file(path, addr, header) 202 const char *path; 203 unsigned int addr; 204 struct exec *header; 205 { 206 207 return load_file_ino(ufs_lookup_path(path), path, addr, header); 208 } 209 210 static int 211 load_file_ino(ino, fn, addr, header) 212 ino_t ino; 213 const char *fn; /* for message only */ 214 unsigned int addr; 215 struct exec *header; 216 { 217 struct dinode dinode; 218 219 /* look-up the file */ 220 if (ino == 0 || ufs_get_inode(ino, &dinode)) { 221 B_PRINT(fn); 222 B_PRINT(": not found\r\n"); 223 return 0; 224 } 225 226 ufs_read(&dinode, (void *)addr, 0, sizeof(struct exec)); 227 memcpy(header, (void *)addr, sizeof(struct exec)); 228 229 if ((N_GETMAGIC(*header) != OMAGIC) || 230 (N_GETMID(*header) != MID_M68K)) { 231 B_PRINT(fn); 232 B_PRINT(": inappropriate format"); 233 return 0; 234 } 235 236 /* read text and data */ 237 ufs_read(&dinode, ((char *)addr)-sizeof(struct exec), 0,/* XXX */ 238 header->a_text+header->a_data); 239 240 /* clear out bss */ 241 memset((char*) addr + header->a_text+header->a_data, 242 0, header->a_bss); 243 244 /* PLANNED: fallback NMAGIC loader for the kernel. */ 245 246 /* return the image size. */ 247 return header->a_text+header->a_data+header->a_bss; 248 } 249 250 251 void 252 bootufs(void) 253 { 254 int bootdev; 255 #ifdef BOOT_DEBUG 256 int i; 257 char bootdevstr[16]; 258 #endif 259 struct exec header; 260 int size; 261 262 #ifdef BOOT_DEBUG 263 /* for debug; */ 264 for (i = 0; i < 16; i++) { 265 print_hex(startregs[i], 8); 266 B_PRINT((i & 7) == 7 ? "\r\n" : " "); 267 } 268 #endif 269 270 /* 271 * get boot device 272 */ 273 if (BINF_ISFD(&BOOT_INFO)) { 274 /* floppy */ 275 #ifdef BOOT_DEBUG 276 *(int *)bootdevstr = ('f' << 24 | 'd' << 16 | '@' << 8 | '0') + 277 (BOOT_INFO & 3); 278 bootdevstr[4] = '\0'; 279 #endif 280 bootdev = X68K_MAKEBOOTDEV(X68K_MAJOR_FD, BOOT_INFO & 3, 281 (FDSECMINMAX.minsec.N == 3) ? 0 : 2); 282 } else { 283 /* SCSI */ 284 int part, ha; 285 286 #ifdef SCSI_ADHOC_BOOTPART 287 part = get_scsi_part(); 288 #else 289 part = 0; /* sd?a only */ 290 #endif 291 #ifndef BOOT_DEBUG 292 ha = get_scsi_host_adapter(); 293 #else 294 ha = get_scsi_host_adapter(bootdevstr); 295 bootdevstr[10] = '0' + (ID & 7); 296 bootdevstr[14] = 'a' + part; 297 #endif 298 bootdev = X68K_MAKESCSIBOOTDEV(X68K_MAJOR_SD, ha >> 4, ha & 15, 299 ID & 7, 0, part); 300 } 301 #ifdef BOOT_DEBUG 302 B_PRINT("boot device: "); 303 B_PRINT(bootdevstr); 304 #endif 305 B_PRINT("\r\n"); 306 307 /* initialize filesystem code */ 308 if (ufs_init()) { 309 BOOT_ERROR("bogus super block: " 310 ""); 311 /* NOTREACHED */ 312 } 313 #if defined(BOOT_DEBUG) && defined(USE_FFS) && defined(USE_LFS) 314 B_PRINT("file system: "); 315 B_PUTC(ufs_info.fstype == UFSTYPE_FFS ? 316 (unsigned int) 'F' : (unsigned int) 'L'); 317 B_PRINT("FS\r\n"); 318 #endif 319 320 #ifdef BOOT_DEBUG 321 B_PRINT("\r\nlooking up secondary boot... "); 322 #endif 323 324 /* 325 * Look for the 2nd stage boot. 326 */ 327 328 /* Try "boot" first */ 329 size = load_file("boot", BOOT_TEXTADDR, &header); 330 #ifdef BOOT_DEBUG 331 B_PRINT("done.\r\n"); 332 #endif 333 if (size > 0) 334 exec_image(BOOT_TEXTADDR, /* image loaded at */ 335 BOOT_TEXTADDR, /* image executed at */ 336 header.a_entry, /* entry point */ 337 size, /* image size */ 338 bootdev, RB_SINGLE); /* arguments */ 339 340 B_PRINT("can't load the secondary bootstrap.;" 341 "trying /netbsd...\r\n"); 342 343 /* fallback to /netbsd. */ 344 /* always fails since NMAGIC loader is not yet implemented. */ 345 346 size = load_file("netbsd", 0x6000, &header); 347 if (size > 0) { 348 if (*((short *)(0x6000 + header.a_entry - 2)) != 0) { 349 B_PRINT("boot interface of /netbsd is too new!\r\n"); 350 goto fail; 351 } 352 exec_image(0x6000, /* image loaded at */ 353 0, /* image executed at */ 354 header.a_entry, /* entry point */ 355 size, /* image size */ 356 bootdev, RB_SINGLE); /* arguments */ 357 /* NOTREACHED */ 358 } 359 360 fail: 361 BOOT_ERROR("can't load the secondary bootstrap nor the kernel."); 362 /* NOTREACHED */ 363 } 364
Indexes created Fri Sep 26 20:09:58 GMT 2025