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xxboot.c revision 1.2 
      1 /*	$NetBSD: xxboot.c,v 1.2 2001/12/15 23:02:34 fredette 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/reboot.h>
     40 #include <machine/mon.h>
     41 
     42 #include <stand.h>
     43 #include <loadfile.h>
     44 #include "libsa.h"
     45 
     46 /*
     47  * Note that extname is edited based on the running machine type
     48  * (sun3 vs sun3x).  EXTNAMEX is the position of the 'x'.
     49  */
     50 char	extname[] = "netbsd.sun3x";
     51 #define EXTNAMEX (sizeof(extname)-2)
     52 
     53 /*
     54  * If the PROM did not give us a specific kernel name to use,
     55  * and did not specify the -a flag (ask), then try the names
     56  * in the following list.
     57  */
     58 char *kernelnames[] = {
     59 	"netbsd",
     60 	"netbsd.old",
     61 	extname,
     62 	NULL
     63 };
     64 char	line[80];
     65 
     66 void
     67 xxboot_main(const char *boot_type)
     68 {
     69 	struct open_file	f;
     70 	char **npp;
     71 	char *file;
     72 	void *entry;
     73 	int fd;
     74 	u_long marks[MARK_MAX];
     75 
     76 	memset(marks, 0, sizeof(marks));
     77 	if (_is2)
     78 		marks[MARK_START] = sun2_map_mem_load();
     79 	printf(">> %s %s [%s]\n", bootprog_name, boot_type, bootprog_rev);
     80 	prom_get_boot_info();
     81 
     82 	/*
     83 	 * Hold the raw device open so it will not be
     84 	 * closed and reopened on every attempt to
     85 	 * load files that did not exist.
     86 	 */
     87 	f.f_flags = F_RAW;
     88 	if (devopen(&f, 0, &file)) {
     89 		printf("%s: devopen failed\n", boot_type);
     90 		return;
     91 	}
     92 
     93 	/*
     94 	 * Edit the "extended" kernel name based on
     95 	 * the type of machine we are running on.
     96 	 */
     97 	if (_is2)
     98 		extname[EXTNAMEX - 1] = '2';
     99 	if (_is3x == 0)
    100 		extname[EXTNAMEX] = 0;
    101 
    102 	/* If we got the "-a" flag, ask for the name. */
    103 	if (prom_boothow & RB_ASKNAME)
    104 		goto just_ask;
    105 
    106 	/*
    107 	 * If the PROM gave us a file name,
    108 	 * it means the user asked for that
    109 	 * kernel name explicitly.
    110 	 */
    111 	file = prom_bootfile;
    112 	if (file && *file) {
    113 		fd = loadfile(file, marks, LOAD_KERNEL);
    114 		if (fd == -1) {
    115 			goto err;
    116 		} else {
    117 			goto gotit;
    118 		}
    119 	}
    120 
    121 	/*
    122 	 * Try the default kernel names.
    123 	 */
    124 	for (npp = kernelnames; *npp; npp++) {
    125 		file = *npp;
    126 		printf("%s: trying %s\n", boot_type, file);
    127 		fd = loadfile(file, marks, LOAD_KERNEL);
    128 		if (fd != -1)
    129 			goto gotit;
    130 	}
    131 
    132 	/*
    133 	 * Ask what kernel name to load.
    134 	 */
    135 	for (;;) {
    136 
    137 	just_ask:
    138 		file = kernelnames[0];
    139 		printf("filename? [%s]: ", file);
    140 		gets(line);
    141 		if (line[0])
    142 			file = line;
    143 
    144 		fd = loadfile(file, marks, LOAD_KERNEL);
    145 		if (fd != -1)
    146 			break;
    147 
    148 	err:
    149 		printf("%s: %s: loadfile() failed.\n", boot_type, file);
    150 	}
    151 
    152 gotit:
    153 	entry = (void *)marks[MARK_ENTRY];
    154 	if (_is2) {
    155 		printf("relocating program...");
    156 		entry = sun2_map_mem_run(entry);
    157 	}
    158 	printf("starting program at 0x%x\n", entry);
    159 	chain_to(entry);
    160 }
    161