123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
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* fbsdboot.c Boot FreeBSD from DOS
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*
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* (C) 1994 by Christian Gusenbauer (cg@fimp01.fim.uni-linz.ac.at)
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* I ALLOW YOU USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. I DISCLAIM
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* ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
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* USE OF THIS SOFTWARE.
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*
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*/
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#include <dos.h>
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#include <stdio.h>
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#include <process.h>
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#include "reboot.h"
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#include "boot.h"
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#include "bootinfo.h"
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#include "dosboot.h"
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#include "protmod.h"
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#define MAV 1
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#define MIV 7
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#define ptr2pa(x) (((((long)(x))&0xffff0000l)>>12l)+(((long)(x))&0xffffl))
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static void usage(char *name)
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{
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fprintf(stderr, "FreeBSD boot Version %d.%d\n", MAV, MIV);
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fprintf(stderr, "(c) 1994, 1995 Christian Gusenbauer,\n cg@fimp01.fim.uni-linz.ac.at\n\n");
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fprintf(stderr, "usage: %s [ options ] [ kernelname ]\n", name);
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fprintf(stderr, "where options are:\n");
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fprintf(stderr, "\t-r ... use compiled-in rootdev\n");
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fprintf(stderr, "\t-s ... reboot to single user only\n");
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fprintf(stderr, "\t-a ... ask for file name to reboot from\n");
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fprintf(stderr, "\t-d ... give control to kernel debugger\n");
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fprintf(stderr, "\t-c ... invoke user configuration routing\n");
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fprintf(stderr, "\t-v ... print all potentially useful info\n");
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fprintf(stderr, "\t-C ... use cdrom as root\n");
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fprintf(stderr, "\t-D ... boot a kernel from a DOS medium\n");
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fprintf(stderr, "\t (default: c:\\kernel)\n");
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exit(1);
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}
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static unsigned int memsize(int x)
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{
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unsigned int rt=0;
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switch (x) {
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case 1:
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_asm {
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mov bl,1
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mov ah,88h
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int 15h
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mov rt,ax
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}
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break;
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default:
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_asm {
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int 12h
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mov rt,ax
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}
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break;
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}
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return rt;
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}
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int main(int argc, char *argv[])
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{
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char *kernel="/kernel", *ptr;
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int i, dos=0;
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long howto=0;
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extern unsigned long get_diskinfo(int);
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VCPIboot = 0;
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slice = 0;
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for (i = 1; i < argc; i++) { /* check arguments */
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if (argv[i][0] != '-') { /* kernel name */
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kernel = argv[i];
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break;
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}
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ptr = &argv[i][1];
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while (*ptr) { /* check options */
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switch(*ptr) {
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case 'r': howto |= RB_DFLTROOT; break;
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case 's': howto |= RB_SINGLE; break;
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case 'a': howto |= RB_ASKNAME; break;
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case 'c': howto |= RB_CONFIG; break;
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case 'd': howto |= RB_KDB; break;
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case 'v': howto |= RB_VERBOSE; break;
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case 'C': howto |= RB_CDROM; break;
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case 'D': dos = 1; kernel = "c:\\kernel"; break;
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case '?':
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default: usage(argv[0]);
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}
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ptr++;
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}
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}
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bootinfo.bi_version = BOOTINFO_VERSION;
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for (i = 0; i < N_BIOS_GEOM; i++)
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bootinfo.bi_bios_geom[i] = get_diskinfo(0x80+i);
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bootinfo.bi_basemem = memsize(0);
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bootinfo.bi_extmem = memsize(1);
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bootinfo.bi_memsizes_valid = 0; /* that is not yet valid!! */
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bootinfo.bi_kernelname = (char *) ptr2pa(kernel);
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bootinfo.bi_nfs_diskless = NULL;
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bootinfo.bi_size = sizeof(bootinfo);
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if (dos)
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dosboot(howto, kernel); /* boot given kernel from DOS partition */
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else
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bsdboot(0x80, howto, kernel); /* boot from FreeBSD partition */
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return 0;
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}
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