Annotation of sys/arch/sparc64/stand/ofwboot/boot.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: boot.c,v 1.14 2007/05/29 00:03:13 deraadt Exp $ */
! 2: /* $NetBSD: boot.c,v 1.3 2001/05/31 08:55:19 mrg Exp $ */
! 3: /*
! 4: * Copyright (c) 1997, 1999 Eduardo E. Horvath. All rights reserved.
! 5: * Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
! 6: * Copyright (C) 1995, 1996 Wolfgang Solfrank.
! 7: * Copyright (C) 1995, 1996 TooLs GmbH.
! 8: * All rights reserved.
! 9: *
! 10: * ELF support derived from NetBSD/alpha's boot loader, written
! 11: * by Christopher G. Demetriou.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. All advertising materials mentioning features or use of this software
! 22: * must display the following acknowledgement:
! 23: * This product includes software developed by TooLs GmbH.
! 24: * 4. The name of TooLs GmbH may not be used to endorse or promote products
! 25: * derived from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
! 28: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 29: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 30: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! 31: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 32: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 33: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 34: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 35: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 36: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 37: */
! 38:
! 39: /*
! 40: * First try for the boot code
! 41: *
! 42: * Input syntax is:
! 43: * [promdev[{:|,}partition]]/[filename] [flags]
! 44: */
! 45:
! 46: #define ELFSIZE 64
! 47:
! 48: #include <lib/libsa/stand.h>
! 49:
! 50: #include <sys/param.h>
! 51: #include <sys/exec.h>
! 52: #include <sys/exec_elf.h>
! 53: #include <sys/reboot.h>
! 54: #include <sys/disklabel.h>
! 55: #include <machine/boot_flag.h>
! 56:
! 57: #include <machine/cpu.h>
! 58:
! 59: #include "ofdev.h"
! 60: #include "openfirm.h"
! 61:
! 62: #define MEG (1024*1024)
! 63:
! 64: /*
! 65: * Boot device is derived from ROM provided information, or if there is none,
! 66: * this list is used in sequence, to find a kernel.
! 67: */
! 68: char *kernels[] = {
! 69: "bsd",
! 70: NULL
! 71: };
! 72:
! 73: char bootdev[128];
! 74: char bootfile[128];
! 75: int boothowto;
! 76: int debug;
! 77:
! 78:
! 79: #ifdef SPARC_BOOT_ELF
! 80: int elf64_exec(int, Elf64_Ehdr *, u_int64_t *, void **, void **);
! 81: #endif
! 82:
! 83: #if 0
! 84: static void
! 85: prom2boot(dev)
! 86: char *dev;
! 87: {
! 88: char *cp, *lp = 0;
! 89: int handle;
! 90: char devtype[16];
! 91:
! 92: for (cp = dev; *cp; cp++)
! 93: if (*cp == ':')
! 94: lp = cp;
! 95: if (!lp)
! 96: lp = cp;
! 97: *lp = 0;
! 98: }
! 99: #endif
! 100:
! 101: /*
! 102: * parse:
! 103: * [kernel-name] [-options]
! 104: * leave kernel-name in passed-in string
! 105: * put options into *howtop
! 106: * return -1 iff syntax error (no - before options)
! 107: */
! 108:
! 109: static int
! 110: parseargs(str, howtop)
! 111: char *str;
! 112: int *howtop;
! 113: {
! 114: char *cp;
! 115: int i;
! 116:
! 117: *howtop = 0;
! 118: cp = str;
! 119: while (*cp == ' ')
! 120: ++cp;
! 121: if (*cp != '-') {
! 122: while (*cp && *cp != ' ')
! 123: *str++ = *cp++;
! 124: while (*cp == ' ')
! 125: ++cp;
! 126: }
! 127: *str = 0;
! 128: switch(*cp) {
! 129: default:
! 130: printf ("boot options string <%s> must start with -\n", cp);
! 131: return -1;
! 132: case 0:
! 133: return 0;
! 134: case '-':
! 135: break;
! 136: }
! 137:
! 138: ++cp;
! 139: while (*cp) {
! 140: BOOT_FLAG(*cp, *howtop);
! 141: /* handle specialties */
! 142: switch (*cp++) {
! 143: case 'd':
! 144: if (!debug) debug = 1;
! 145: break;
! 146: case 'D':
! 147: debug = 2;
! 148: break;
! 149: }
! 150: }
! 151: return 0;
! 152: }
! 153:
! 154:
! 155: static void
! 156: chain(pentry, args, ssym, esym)
! 157: u_int64_t pentry;
! 158: char *args;
! 159: void *ssym;
! 160: void *esym;
! 161: {
! 162: extern char end[];
! 163: void (*entry)();
! 164: int l, machine_tag;
! 165: long newargs[3];
! 166:
! 167: entry = (void *)(long)pentry;
! 168:
! 169: freeall();
! 170: /*
! 171: * When we come in args consists of a pointer to the boot
! 172: * string. We need to fix it so it takes into account
! 173: * other params such as romp.
! 174: */
! 175:
! 176: /*
! 177: * Stash pointer to end of symbol table after the argument
! 178: * strings.
! 179: */
! 180: l = strlen(args) + 1;
! 181: bcopy(&esym, args + l, sizeof(esym));
! 182: l += sizeof(esym);
! 183:
! 184: /*
! 185: * Tell the kernel we're an OpenFirmware system.
! 186: */
! 187: #define SPARC_MACHINE_OPENFIRMWARE 0x44444230
! 188: machine_tag = SPARC_MACHINE_OPENFIRMWARE;
! 189: bcopy(&machine_tag, args + l, sizeof(machine_tag));
! 190: l += sizeof(machine_tag);
! 191:
! 192: /*
! 193: * Since we don't need the boot string (we can get it from /chosen)
! 194: * we won't pass it in. Just pass in esym and magic #
! 195: */
! 196: newargs[0] = SPARC_MACHINE_OPENFIRMWARE;
! 197: newargs[1] = (long)esym;
! 198: newargs[2] = (long)ssym;
! 199: args = (char *)newargs;
! 200: l = sizeof(newargs);
! 201:
! 202: #ifdef DEBUG
! 203: printf("chain: calling OF_chain(%x, %x, %x, %x, %x)\n",
! 204: (void *)RELOC, end - (char *)RELOC, entry, args, l);
! 205: #endif
! 206: /* if -D is set then pause in the PROM. */
! 207: if (debug > 1) OF_enter();
! 208: OF_chain((void *)RELOC, ((end - (char *)RELOC)+NBPG)%NBPG, entry, args, l);
! 209: panic("chain");
! 210: }
! 211:
! 212: int
! 213: loadfile(fd, args)
! 214: int fd;
! 215: char *args;
! 216: {
! 217: union {
! 218: #ifdef SPARC_BOOT_ELF
! 219: Elf64_Ehdr elf64;
! 220: #endif
! 221: } hdr;
! 222: int rval;
! 223: u_int64_t entry = 0;
! 224: void *ssym;
! 225: void *esym;
! 226:
! 227: ssym = NULL;
! 228: esym = NULL;
! 229:
! 230: /* Load the header. */
! 231: #ifdef DEBUG
! 232: printf("loadfile: reading header\n");
! 233: #endif
! 234: if ((rval = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
! 235: if (rval == -1)
! 236: printf("read header: %s\n", strerror(errno));
! 237: else
! 238: printf("read header: short read (only %d of %d)\n",
! 239: rval, sizeof(hdr));
! 240: rval = 1;
! 241: goto err;
! 242: }
! 243:
! 244: /* Determine file type, load kernel. */
! 245: #ifdef SPARC_BOOT_ELF
! 246: if (bcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 &&
! 247: hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) {
! 248: rval = elf64_exec(fd, &hdr.elf64, &entry, &ssym, &esym);
! 249: } else
! 250: #endif
! 251: {
! 252: rval = 1;
! 253: printf("unknown executable format\n");
! 254: }
! 255:
! 256: if (rval)
! 257: goto err;
! 258:
! 259: printf(" start=0x%lx\n", (unsigned long)entry);
! 260:
! 261: close(fd);
! 262:
! 263: chain(entry, args, ssym, esym);
! 264: /* NOTREACHED */
! 265:
! 266: err:
! 267: close(fd);
! 268: return (rval);
! 269: }
! 270:
! 271: #ifdef SPARC_BOOT_ELF
! 272: #include "elfXX_exec.c"
! 273: #endif /* SPARC_BOOT_ELF */
! 274:
! 275: int
! 276: main()
! 277: {
! 278: extern char version[];
! 279: int chosen;
! 280: char bootline[512]; /* Should check size? */
! 281: char *cp;
! 282: int i, fd;
! 283: char **bootlp;
! 284: char *just_bootline[2];
! 285:
! 286: printf(">> OpenBSD BOOT %s\n", version);
! 287:
! 288: /*
! 289: * Get the boot arguments from Openfirmware
! 290: */
! 291: if ((chosen = OF_finddevice("/chosen")) == -1 ||
! 292: OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
! 293: OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
! 294: printf("Invalid Openfirmware environment\n");
! 295: exit();
! 296: }
! 297:
! 298: /*
! 299: * case 1: boot net -a
! 300: * -> gets loop
! 301: * case 2: boot net kernel [options]
! 302: * -> boot kernel, gets loop
! 303: * case 3: boot net [options]
! 304: * -> iterate boot list, gets loop
! 305: */
! 306:
! 307: bootlp = kernels;
! 308: if (parseargs(bootline, &boothowto) == -1 ||
! 309: (boothowto & RB_ASKNAME)) {
! 310: bootlp = 0;
! 311: } else if (*bootline) {
! 312: just_bootline[0] = bootline;
! 313: just_bootline[1] = 0;
! 314: bootlp = just_bootline;
! 315: }
! 316: for (;;) {
! 317: if (bootlp) {
! 318: cp = *bootlp++;
! 319: if (!cp) {
! 320: printf("\n");
! 321: bootlp = 0;
! 322: kernels[0] = 0; /* no more iteration */
! 323: } else if (cp != bootline) {
! 324: printf("Trying %s...\n", cp);
! 325: strlcpy(bootline, cp, sizeof bootline);
! 326: }
! 327: }
! 328: if (!bootlp) {
! 329: printf("Boot: ");
! 330: gets(bootline);
! 331: if (parseargs(bootline, &boothowto) == -1)
! 332: continue;
! 333: if (!*bootline) {
! 334: bootlp = kernels;
! 335: continue;
! 336: }
! 337: if (strcmp(bootline, "exit") == 0 ||
! 338: strcmp(bootline, "halt") == 0) {
! 339: _rtt();
! 340: }
! 341: }
! 342: if ((fd = open(bootline, 0)) < 0) {
! 343: printf("open %s: %s\n", opened_name, strerror(errno));
! 344: continue;
! 345: }
! 346: #ifdef __notyet__
! 347: OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1);
! 348: cp = bootline;
! 349: #else
! 350: strlcpy(bootline, opened_name, sizeof bootline);
! 351: cp = bootline + strlen(bootline);
! 352: *cp++ = ' ';
! 353: #endif
! 354: *cp = '-';
! 355: if (boothowto & RB_ASKNAME)
! 356: *++cp = 'a';
! 357: if (boothowto & RB_SINGLE)
! 358: *++cp = 's';
! 359: if (boothowto & RB_KDB)
! 360: *++cp = 'd';
! 361: if (*cp == '-')
! 362: *--cp = 0;
! 363: else
! 364: *++cp = 0;
! 365: #ifdef __notyet__
! 366: OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1);
! 367: #endif
! 368: /* XXX void, for now */
! 369: #ifdef DEBUG
! 370: if (debug)
! 371: printf("main: Calling loadfile(fd, %s)\n", bootline);
! 372: #endif
! 373: (void)loadfile(fd, bootline);
! 374: }
! 375: return 0;
! 376: }
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