bootxx.c revision 1.2
1 /* $NetBSD: bootxx.c,v 1.2 1997/06/28 21:36:28 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Waldi Ravens. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Waldi Ravens. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 asm(" .text 34 .even 35 start: 36 bras _bootxx 37 "); 38 #define boot_BSD bsd_startup 39 40 #include <stand.h> 41 #include <atari_stand.h> 42 #include <string.h> 43 #include <libkern.h> 44 #include <kparamb.h> 45 #include <sys/exec.h> 46 #include <sys/reboot.h> 47 #include <machine/cpu.h> 48 49 #include "bootxx.h" 50 51 void boot_BSD __P((kparb *)__attribute__((noreturn))); 52 int load_BSD __P((osdsc *)); 53 int sys_info __P((osdsc *)); 54 int usr_info __P((osdsc *)); 55 56 int 57 bootxx(readsector, disklabel, autoboot) 58 void *readsector, 59 *disklabel; 60 int autoboot; 61 { 62 static osdsc os_desc; 63 extern char end[], edata[]; 64 osdsc *od = &os_desc; 65 66 bzero(edata, end - edata); 67 68 printf("\033v\nNetBSD/Atari boot loader ($Revision: 1.2 $)\n\n"); 69 70 if (init_dskio(readsector, disklabel, -1)) 71 return(-1); 72 73 if (sys_info(od)) 74 return(-2); 75 76 for (;;) { 77 od->rootfs = 0; /* partition a */ 78 od->osname = "/netbsd"; 79 od->ostype = &od->osname[1]; 80 od->boothowto = (RB_RDONLY); 81 82 if (!autoboot) { 83 int pref; 84 85 od->boothowto = (RB_RDONLY|RB_SINGLE); 86 pref = usr_info(od); 87 if (pref < 0) 88 continue; 89 if (pref > 0) 90 return(pref); 91 } 92 autoboot = 0; /* in case auto boot fails */ 93 94 if (init_dskio(readsector, disklabel, od->rootfs)) 95 continue; 96 97 if (load_BSD(od)) 98 continue; 99 100 boot_BSD(&od->kp); 101 } 102 /* NOTREACHED */ 103 } 104 105 int 106 sys_info(od) 107 osdsc *od; 108 { 109 long *jar; 110 int tos; 111 112 od->stmem_size = *ADDR_PHYSTOP; 113 114 if (*ADDR_CHKRAMTOP == RAMTOP_MAGIC) { 115 od->ttmem_size = *ADDR_RAMTOP; 116 if (od->ttmem_size > TTRAM_BASE) { 117 od->ttmem_size -= TTRAM_BASE; 118 od->ttmem_start = TTRAM_BASE; 119 } 120 } 121 122 tos = (*ADDR_SYSBASE)->os_version; 123 if ((tos > 0x300) && (tos < 0x306)) 124 od->cputype = ATARI_CLKBROKEN; 125 126 if ((jar = *ADDR_P_COOKIE)) { 127 while (jar[0]) { 128 if (jar[0] == 0x5f435055L) { /* _CPU */ 129 switch(jar[1]) { 130 case 0: 131 od->cputype |= ATARI_68000; 132 break; 133 case 10: 134 od->cputype |= ATARI_68010; 135 break; 136 case 20: 137 od->cputype |= ATARI_68020; 138 break; 139 case 30: 140 od->cputype |= ATARI_68030; 141 break; 142 case 40: 143 od->cputype |= ATARI_68040; 144 break; 145 } 146 } 147 jar += 2; 148 } 149 } 150 if (!(od->cputype & ATARI_ANYCPU)) { 151 printf("Unknown CPU-type.\n"); 152 return(-1); 153 } 154 155 return(0); 156 } 157 158 int 159 usr_info(od) 160 osdsc *od; 161 { 162 static char line[800]; 163 char c, *p = line; 164 165 printf("\nEnter os-type [.%s] root-fs [:a] kernel [%s]" 166 " options [none]:\n\033e", od->ostype, od->osname); 167 gets(p); 168 printf("\033f"); 169 170 for (;;) { 171 while (isspace(*p)) 172 *p++ = '\0'; 173 174 switch (*p++) { 175 case '\0': 176 goto done; 177 case ':': 178 if ((c = *p) >= 'a' && c <= 'z') 179 od->rootfs = c - 'a'; 180 else if (c >= 'A' && c <= 'Z') 181 od->rootfs = c - ('A' - 27); 182 else return(-1); 183 184 if (!od->rootfs) 185 break; 186 *p = 'b'; 187 /* FALLTHROUGH */ 188 case '-': 189 if ((c = *p) == 'a') 190 od->boothowto &= ~RB_SINGLE; 191 else if (c == 'b') 192 od->boothowto |= RB_ASKNAME; 193 else if (c == 'd') 194 od->boothowto |= RB_KDB; 195 else return(-1); 196 break; 197 case '.': 198 od->ostype = p; 199 break; 200 case '/': 201 od->osname = --p; 202 break; 203 default: 204 return(-1); 205 } 206 207 while ((c = *p) && !isspace(c)) 208 p += 1; 209 } 210 211 done: 212 c = od->ostype[0]; 213 if (isupper(c)) 214 c = tolower(c); 215 216 switch (c) { 217 case 'n': /* NetBSD */ 218 return(0); 219 case 'l': /* Linux */ 220 return(0x10); 221 case 'a': /* ASV */ 222 return(0x40); 223 case 't': /* TOS */ 224 return(0x80); 225 default: 226 return(-1); 227 } 228 } 229 230 int 231 load_BSD(od) 232 osdsc *od; 233 { 234 struct exec hdr; 235 int err, fd; 236 u_int textsz, strsz; 237 238 /* 239 * Read kernel's exec-header. 240 */ 241 err = 1; 242 if ((fd = open(od->osname, 0)) < 0) 243 goto error; 244 err = 2; 245 if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) 246 goto error; 247 err = 3; 248 if (N_GETMAGIC(hdr) != NMAGIC) 249 goto error; 250 251 /* 252 * Extract sizes from kernel executable. 253 */ 254 textsz = (hdr.a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1); 255 od->ksize = textsz + hdr.a_data + hdr.a_bss; 256 od->kentry = hdr.a_entry; 257 od->kstart = NULL; 258 od->k_esym = 0; 259 260 if (hdr.a_syms) { 261 u_int x = sizeof(hdr) + hdr.a_text + hdr.a_data + hdr.a_syms; 262 err = 8; 263 if (lseek(fd, (off_t)x, SEEK_SET) != x) 264 goto error; 265 err = 9; 266 if (read(fd, &strsz, sizeof(strsz)) != sizeof(strsz)) 267 goto error; 268 err = 10; 269 if (lseek(fd, (off_t)sizeof(hdr), SEEK_SET) != sizeof(hdr)) 270 goto error; 271 od->ksize += sizeof(strsz) + hdr.a_syms + strsz; 272 } 273 274 /* 275 * Read text & data, clear bss 276 */ 277 err = 16; 278 if ((od->kstart = alloc(od->ksize)) == NULL) 279 goto error; 280 err = 17; 281 if (read(fd, od->kstart, hdr.a_text) != hdr.a_text) 282 goto error; 283 err = 18; 284 if (read(fd, od->kstart + textsz, hdr.a_data) != hdr.a_data) 285 goto error; 286 bzero(od->kstart + textsz + hdr.a_data, hdr.a_bss); 287 288 /* 289 * Read symbol and string table 290 */ 291 if (hdr.a_syms) { 292 char *p = od->kstart + textsz + hdr.a_data + hdr.a_bss; 293 *((u_int32_t *)p)++ = hdr.a_syms; 294 err = 24; 295 if (read(fd, p, hdr.a_syms) != hdr.a_syms) 296 goto error; 297 p += hdr.a_syms; 298 err = 25; 299 if (read(fd, p, strsz) != strsz) 300 goto error; 301 od->k_esym = (p - (char *)od->kstart) + strsz; 302 } 303 304 return(0); 305 306 error: 307 if (fd >= 0) { 308 if (od->kstart) 309 free(od->kstart, od->ksize); 310 close(fd); 311 } 312 printf("Error %d in load_BSD.\n", err); 313 return(-1); 314 } 315
Indexes created Thu Oct 02 14:10:14 GMT 2025