boot.c revision 1.12 
1/*	$NetBSD: boot.c,v 1.12 2016/06/11 06:35:00 dholland Exp $	*/
2/*
3 * Copyright (c) 1994 Rolf Grossmann
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *      This product includes software developed by Rolf Grossmann.
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33#include <sys/reboot.h>
34
35#include <lib/libsa/stand.h>
36#include <lib/libsa/loadfile.h>
37#include <lib/libkern/libkern.h>
38
39#include <machine/cpu.h>        /* for NEXT_RAMBASE */
40
41#include <next68k/next68k/nextrom.h>
42
43#define KERN_LOADADDR NEXT_RAMBASE
44
45extern int errno;
46
47extern char *mg;
48#define	MON(type, off) (*(type *)((u_int) (mg) + off))
49
50int devparse(const char *, int *, char *, char *, char *, char **);
51
52/* the PROM overwrites MG_boot_arg :-( */
53/* #define PROCESS_ARGS */
54
55/*
56 * Boot device is derived from PROM provided information.
57 */
58
59extern char bootprog_rev[];
60extern char bootprog_name[];
61extern int build;
62#define KNAMEN 100
63char kernel[KNAMEN];
64int entry_point;		/* return value filled in by machdep_start */
65int turbo;
66
67extern void rtc_init(void);
68
69extern int try_bootp;
70
71volatile int qq;
72
73int
74main(char *boot_arg)
75{
76	int fd;
77	u_long marks[MARK_MAX];
78	int dev;
79	char count, lun, part;
80	char machine;
81	char *file;
82#ifdef PROCESS_ARGS
83	char *kernel_args = MON(char *, MG_boot_dev);
84#endif
85
86	machine = MON(char, MG_machine_type);
87	if (machine == NeXT_TURBO_MONO || machine == NeXT_TURBO_COLOR)
88		turbo = 1;
89	else
90		turbo = 0;
91
92	memset(marks, 0, sizeof(marks));
93	printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
94	printf(">> type %d, %sturbo\n", machine, turbo ? "" : "non-");
95	rtc_init();
96
97	try_bootp = 1;
98
99#if 0
100	{
101		int i;
102		int *p = (int *)mg;
103		for (i = 0; i <= 896; ) {
104			printf ("%d: %x %x %x %x %x %x %x %x\n", i, p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
105			p = &p[8];
106			i += 8*4;
107		}
108	}
109	printf("Press return to continue.\n");
110	getchar();
111#endif
112
113	strcpy(kernel, boot_arg);
114	entry_point = 0;
115
116	for (;;) {
117		marks[MARK_START] = (u_long)KERN_LOADADDR;
118		fd = loadfile(kernel, marks, LOAD_KERNEL);
119		if (fd != -1) {
120			break;
121		}
122
123		printf("load of %s: %s\n", kernel, strerror(errno));
124		printf("boot: ");
125		kgets(kernel, sizeof(kernel));
126		if (kernel[0] == '\0')
127			return 0;
128
129#ifdef PROCESS_ARGS
130		kernel_args = strchr(kernel, ')');
131		if (kernel_args == NULL)
132			kernel_args = kernel;
133		kernel_args = strchr(kernel_args, ' ');
134		if (kernel_args)
135			*kernel_args++ = '\0';
136#endif
137	}
138
139	dev = 0;
140	count = lun = part = 0;
141	if (devparse(kernel, &dev, &count, &lun, &part, &file) == 0) {
142		char *p = (char *)marks[MARK_END];
143		strcpy (p, devsw[dev].dv_name);
144		MON(char *, MG_boot_dev) = p;
145		p += strlen (p) + 1;
146		snprintf (p, 1024, "(%d,%d,%d)", count, lun, part); /* XXX */
147		MON(char *, MG_boot_info) = p;
148		p += strlen (p) + 1;
149		snprintf (p, 1024, "%s", file); /* XXX */
150		MON(char *, MG_boot_file) = p;
151#ifdef PROCESS_ARGS
152		p += strlen (p) + 1;
153		if (kernel_args)
154			strcpy (p, kernel_args);
155		else
156			*p = 0;
157		MON(char *, MG_boot_arg) = p;
158#endif
159	}
160
161	*((u_long *)KERN_LOADADDR) = marks[MARK_END] - KERN_LOADADDR;
162	printf("entry 0x%lx esym 0x%lx\n",
163	       marks[MARK_ENTRY], marks[MARK_END] - KERN_LOADADDR);
164	return marks[MARK_ENTRY];
165}
166