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      1 /*	$NetBSD: boot.c,v 1.8 2016/06/11 06:49:46 dholland Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1982, 1986, 1990, 1993
      5  *	The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
     32  */
     33 
     34 #include <sys/param.h>
     35 #include <sys/reboot.h>
     36 #include <machine/mon.h>
     37 
     38 #include <stand.h>
     39 #include <loadfile.h>
     40 #include "libsa.h"
     41 
     42 /*
     43  * Default the name (really tape segment number).
     44  * The defaults assume the following tape layout:
     45  *   segment 0:  tapeboot
     46  *   segment 1:  netbsd.sun3  (RAMDISK3)
     47  *   segment 2:  netbsd.sun3x (RAMDISK3X)
     48  *   segment 3:  miniroot image
     49  *   segment 4:  netbsd.sun2  (RAMDISK)
     50  * Therefore, the default name is "1" or "2" or "4"
     51  * for sun3, sun3x, and sun2, respectively.
     52  */
     53 
     54 char	defname[32] = "1";
     55 char	line[80];
     56 
     57 int
     58 main(void)
     59 {
     60 	char *cp, *file;
     61 	void *entry;
     62 	u_long marks[MARK_MAX];
     63 	u_long mark_start;
     64 	int fd;
     65 
     66 	printf(">> %s tapeboot [%s]\n", bootprog_name, bootprog_rev);
     67 	prom_get_boot_info();
     68 
     69 	/*
     70 	 * Can not hold open the tape device as is done
     71 	 * in the other boot programs because it does
     72 	 * its position-to-segment on open.
     73 	 */
     74 
     75 	/* Assume the Sun3/Sun3x load start. */
     76 	memset(marks, 0, sizeof(marks));
     77 	mark_start = 0;
     78 
     79 	/* If running on a Sun3X, use segment 2. */
     80 	if (_is3x)
     81 		defname[0] = '2';
     82 
     83 	/*
     84 	 * If running on a Sun2, use segment 4 and
     85 	 * do the special MMU setup.
     86 	 */
     87 	else if (_is2) {
     88 		defname[0] = '4';
     89 		mark_start = sun2_map_mem_load();
     90 	}
     91 
     92 	file = defname;
     93 
     94 	cp = prom_bootfile;
     95 	if (cp && *cp)
     96 		file = cp;
     97 
     98 	for (;;) {
     99 		if (prom_boothow & RB_ASKNAME) {
    100 			printf("tapeboot: segment? [%s]: ", defname);
    101 			kgets(line, sizeof(line));
    102 			if (line[0])
    103 				file = line;
    104 			else
    105 				file = defname;
    106 		} else
    107 			printf("tapeboot: loading segment %s\n", file);
    108 
    109 		marks[MARK_START] = mark_start;
    110 		if ((fd = loadfile(file, marks,
    111 		    LOAD_KERNEL & ~LOAD_BACKWARDS)) != -1) {
    112 			break;
    113 		}
    114 		printf("tapeboot: segment %s: %s\n", file, strerror(errno));
    115 		prom_boothow |= RB_ASKNAME;
    116 	}
    117 	close(fd);
    118 
    119 	entry = (void *)marks[MARK_ENTRY];
    120 	if (_is2) {
    121 		printf("relocating program...");
    122 		entry = sun2_map_mem_run(entry);
    123 	}
    124 	printf("Starting program at 0x%x\n", (u_int)entry);
    125 	chain_to(entry);
    126 
    127 	return 0;
    128 }
    129