274 lines
6.6 KiB
C
274 lines
6.6 KiB
C
/* $NetBSD: boot.c,v 1.4 1995/08/29 21:55:41 phil Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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#ifndef lint
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static char rcsid[] = "$NetBSD: boot.c,v 1.4 1995/08/29 21:55:41 phil Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <a.out.h>
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#include "stand.h"
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#include "samachdep.h"
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/*
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* Boot program... bits in `howto' determine whether boot stops to
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* ask for system name. Boot device is derived from ROM provided
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* information.
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*/
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extern unsigned opendev;
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extern int noconsole;
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extern int testing;
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char *ssym, *esym;
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char *name;
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char *names[] = {
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"/netbsd", "/onetbsd", "/netbsd.old",
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};
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#define NUMNAMES (sizeof(names)/sizeof(char *))
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static int bdev, bctlr, bunit, bpart;
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main()
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{
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int currname = 0;
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int io;
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cninit();
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scsiinit();
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printf("\n>> NetBSD BOOT pc532 [$Revision: 1.4 $]\n");
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bdev = B_TYPE(bootdev);
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bctlr = B_CONTROLLER(bootdev);
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bunit = B_UNIT(bootdev);
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bpart = B_PARTITION(bootdev);
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for (;;) {
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name = names[currname++];
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if (currname == NUMNAMES)
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currname = 0;
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if (!noconsole) {
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howto = 0;
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getbootdev(&howto);
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}
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else
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printf(": %s\n", name);
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io = open(name, 0);
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if (io >= 0) {
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copyunix(howto, opendev, io);
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close(io);
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}
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else
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printf("boot: %s\n", strerror(errno));
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}
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}
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/*ARGSUSED*/
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copyunix(howto, devtype, io)
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register int howto; /* boot flags */
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register u_int devtype; /* boot device */
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register int io;
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{
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struct exec x;
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int i;
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register char *load; /* load addr for unix */
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register char *addr;
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char *file;
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int dev, ctlr, unit, part;
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/* XXX use devtype? */
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dev = B_TYPE(opendev);
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ctlr = B_CONTROLLER(opendev);
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unit = B_UNIT(opendev);
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part = B_PARTITION(opendev);
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/* get the file name part of name */
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devparse(name, &i, &i, &i, &i, &i, &file);
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i = read(io, (char *)&x, sizeof(x));
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if (i != sizeof(x) || N_BADMAG(x)) {
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printf("Bad format\n");
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return;
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}
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load = addr = (char *)(x.a_entry & 0x00ffff00); /* XXX make less magical? */
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printf("Booting %s%d%c:%s @ 0x%x\n",
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devsw[dev].dv_name, unit + (8*ctlr), 'a' + part, file, addr);
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if (testing) {
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load = addr = alloc(2*1024*1024); /* XXX stat the file? */
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if (!addr) {
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printf("alloc failed\n");
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exit(1);
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}
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}
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/* Text */
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printf("%d", x.a_text);
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if (N_GETMAGIC(x) == ZMAGIC && lseek(io, 0, SEEK_SET) == -1)
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goto shread;
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if (read(io, (char *)addr, x.a_text) != x.a_text)
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goto shread;
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addr += x.a_text;
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if (N_GETMAGIC(x) == NMAGIC)
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while ((int)addr & CLOFSET)
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*addr++ = 0;
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/* Data */
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printf("+%d", x.a_data);
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if (read(io, addr, x.a_data) != x.a_data)
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goto shread;
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addr += x.a_data;
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/* Bss */
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printf("+%d", x.a_bss);
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bzero( addr, x.a_bss );
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addr += x.a_bss;
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/* Symbols */
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ssym = addr;
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bcopy(&x.a_syms, addr, sizeof(x.a_syms));
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addr += sizeof(x.a_syms);
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printf(" [%d+", x.a_syms);
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if (x.a_syms && read(io, addr, x.a_syms) != x.a_syms)
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goto shread;
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addr += x.a_syms;
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/* read size of string table */
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i = 0;
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if (x.a_syms && read(io, &i, sizeof(int)) != sizeof(int))
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goto shread;
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/* read strings */
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printf("%d]", i);
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bcopy(&i, addr, sizeof(int));
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if (i) {
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i -= sizeof(int);
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addr += sizeof(int);
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if (read(io, addr, i) != i)
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goto shread;
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addr += i;
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}
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#define round_to_size(x,t) \
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(((int)(x) + sizeof(t) - 1) & ~(sizeof(t) - 1))
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esym = (char *)round_to_size(addr - load,int);
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#undef round_to_size
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/* and note the end address of all this */
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printf(" total=0x%x", addr);
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x.a_entry &= 0xffffff;
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printf(" start 0x%x\n", x.a_entry);
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#ifdef DEBUG
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printf("ssym=0x%x esym=0x%x\n", ssym, esym);
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printf("\n\nReturn to boot...\n");
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getchar();
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#endif
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if (!testing) {
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#ifdef __GNUC__
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/* do NOT change order!!
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* the following are passed as args, and are in registers
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* clobbered by the last two movd's!!!
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*/
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asm(" movd %0,r5" : : "g" (load));
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asm(" movd %0,r6" : : "g" (devtype));
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asm(" movd %0,r7" : : "g" (howto));
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/* magic value for locore.s to look for (3253232532) */
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asm(" movd %0,r3" : : "i" (0xc1e86394));
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asm(" movd %0,r4" : : "g" (esym));
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#endif /* __GNUC__ */
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(*((int (*)()) x.a_entry))();
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}
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return;
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shread:
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printf("Short read\n");
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return;
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}
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char line[100];
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getbootdev(howto)
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int *howto;
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{
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char c, *ptr = line;
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printf("Boot: [[[%s%d%c:]%s][-abdrs]] :- ",
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devsw[bdev].dv_name, bunit + (8 * bctlr), 'a'+bpart, name);
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if (tgets(line)) {
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while (c = *ptr) {
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while (c == ' ')
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c = *++ptr;
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if (!c)
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return;
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if (c == '-')
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while ((c = *++ptr) && c != ' ')
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switch (c) {
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case 'a':
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*howto |= RB_ASKNAME;
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continue;
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case 'b':
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*howto |= RB_HALT;
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continue;
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case 'd':
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*howto |= RB_KDB;
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continue;
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case 'r':
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*howto |= RB_DFLTROOT;
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continue;
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case 's':
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*howto |= RB_SINGLE;
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continue;
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}
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else {
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name = ptr;
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while ((c = *++ptr) && c != ' ');
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if (c)
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*ptr++ = 0;
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}
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}
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} else
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printf("\n");
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}
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