/*      $NetBSD: boot.c,v 1.8 2016/06/11 06:49:46 dholland Exp $ */

/*-
* Copyright (c) 1982, 1986, 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)boot.c      8.1 (Berkeley) 6/10/93
*/

#include <sys/param.h>
#include <sys/reboot.h>
#include <machine/mon.h>

#include <stand.h>
#include <loadfile.h>
#include "libsa.h"

/*
* Default the name (really tape segment number).
* The defaults assume the following tape layout:
*   segment 0:  tapeboot
*   segment 1:  netbsd.sun3  (RAMDISK3)
*   segment 2:  netbsd.sun3x (RAMDISK3X)
*   segment 3:  miniroot image
*   segment 4:  netbsd.sun2  (RAMDISK)
* Therefore, the default name is "1" or "2" or "4"
* for sun3, sun3x, and sun2, respectively.
*/

char    defname[32] = "1";
char    line[80];

int
main(void)
{
       char *cp, *file;
       void *entry;
       u_long marks[MARK_MAX];
       u_long mark_start;
       int fd;

       printf(">> %s tapeboot [%s]\n", bootprog_name, bootprog_rev);
       prom_get_boot_info();

       /*
        * Can not hold open the tape device as is done
        * in the other boot programs because it does
        * its position-to-segment on open.
        */

       /* Assume the Sun3/Sun3x load start. */
       memset(marks, 0, sizeof(marks));
       mark_start = 0;

       /* If running on a Sun3X, use segment 2. */
       if (_is3x)
               defname[0] = '2';

       /*
        * If running on a Sun2, use segment 4 and
        * do the special MMU setup.
        */
       else if (_is2) {
               defname[0] = '4';
               mark_start = sun2_map_mem_load();
       }

       file = defname;

       cp = prom_bootfile;
       if (cp && *cp)
               file = cp;

       for (;;) {
               if (prom_boothow & RB_ASKNAME) {
                       printf("tapeboot: segment? [%s]: ", defname);
                       kgets(line, sizeof(line));
                       if (line[0])
                               file = line;
                       else
                               file = defname;
               } else
                       printf("tapeboot: loading segment %s\n", file);

               marks[MARK_START] = mark_start;
               if ((fd = loadfile(file, marks,
                   LOAD_KERNEL & ~LOAD_BACKWARDS)) != -1) {
                       break;
               }
               printf("tapeboot: segment %s: %s\n", file, strerror(errno));
               prom_boothow |= RB_ASKNAME;
       }
       close(fd);

       entry = (void *)marks[MARK_ENTRY];
       if (_is2) {
               printf("relocating program...");
               entry = sun2_map_mem_run(entry);
       }
       printf("Starting program at 0x%x\n", (u_int)entry);
       chain_to(entry);

       return 0;
}