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      1 /*	$NetBSD: xxboot.c,v 1.7 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  * Note that extname is edited based on the running machine type
     44  * (sun3 vs sun3x).  EXTNAMEX is the position of the 'x'.
     45  */
     46 char	extname[] = "netbsd.sun3x";
     47 #define EXTNAMEX (sizeof(extname)-2)
     48 
     49 /*
     50  * If the PROM did not give us a specific kernel name to use,
     51  * and did not specify the -a flag (ask), then try the names
     52  * in the following list.
     53  */
     54 char *kernelnames[] = {
     55 	"netbsd",
     56 	"netbsd.old",
     57 	extname,
     58 	NULL
     59 };
     60 char	line[80];
     61 
     62 void
     63 xxboot_main(const char *boot_type)
     64 {
     65 	struct open_file f;
     66 	char **npp;
     67 	char *file;
     68 	void *entry;
     69 	int fd;
     70 	u_long marks[MARK_MAX];
     71 
     72 	memset(marks, 0, sizeof(marks));
     73 	if (_is2)
     74 		marks[MARK_START] = sun2_map_mem_load();
     75 	printf(">> %s %s [%s]\n", bootprog_name, boot_type, bootprog_rev);
     76 	prom_get_boot_info();
     77 
     78 	/*
     79 	 * Hold the raw device open so it will not be
     80 	 * closed and reopened on every attempt to
     81 	 * load files that did not exist.
     82 	 */
     83 	f.f_flags = F_RAW;
     84 	if (devopen(&f, 0, &file)) {
     85 		printf("%s: devopen failed\n", boot_type);
     86 		return;
     87 	}
     88 
     89 	/*
     90 	 * Edit the "extended" kernel name based on
     91 	 * the type of machine we are running on.
     92 	 */
     93 	if (_is2)
     94 		extname[EXTNAMEX - 1] = '2';
     95 	if (_is3x == 0)
     96 		extname[EXTNAMEX] = 0;
     97 
     98 	/* If we got the "-a" flag, ask for the name. */
     99 	if (prom_boothow & RB_ASKNAME)
    100 		goto just_ask;
    101 
    102 	/*
    103 	 * If the PROM gave us a file name,
    104 	 * it means the user asked for that
    105 	 * kernel name explicitly.
    106 	 */
    107 	file = prom_bootfile;
    108 	if (file && *file) {
    109 		fd = loadfile(file, marks, LOAD_KERNEL);
    110 		if (fd == -1) {
    111 			goto err;
    112 		} else {
    113 			goto gotit;
    114 		}
    115 	}
    116 
    117 	/*
    118 	 * Try the default kernel names.
    119 	 */
    120 	for (npp = kernelnames; *npp; npp++) {
    121 		file = *npp;
    122 		printf("%s: trying %s\n", boot_type, file);
    123 		fd = loadfile(file, marks, LOAD_KERNEL);
    124 		if (fd != -1)
    125 			goto gotit;
    126 	}
    127 
    128 	/*
    129 	 * Ask what kernel name to load.
    130 	 */
    131 	for (;;) {
    132 
    133 	just_ask:
    134 		file = kernelnames[0];
    135 		printf("filename? [%s]: ", file);
    136 		kgets(line, sizeof(line));
    137 		if (line[0])
    138 			file = line;
    139 
    140 		fd = loadfile(file, marks, LOAD_KERNEL);
    141 		if (fd != -1)
    142 			break;
    143 
    144 	err:
    145 		printf("%s: %s: loadfile() failed.\n", boot_type, file);
    146 	}
    147 
    148 gotit:
    149 	entry = (void *)marks[MARK_ENTRY];
    150 	if (_is2) {
    151 		printf("relocating program...");
    152 		entry = sun2_map_mem_run(entry);
    153 	}
    154 	printf("starting program at 0x%x\n", (u_int)entry);
    155 	chain_to(entry);
    156 }
    157