boot.c revision 1.13 
1/*	$NetBSD: boot.c,v 1.13 2001/08/23 14:17:27 tsubai Exp $	*/
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
41 * Copyright (C) 1995, 1996 TooLs GmbH.
42 * All rights reserved.
43 *
44 * ELF support derived from NetBSD/alpha's boot loader, written
45 * by Christopher G. Demetriou.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 *    notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 *    notice, this list of conditions and the following disclaimer in the
54 *    documentation and/or other materials provided with the distribution.
55 * 3. All advertising materials mentioning features or use of this software
56 *    must display the following acknowledgement:
57 *	This product includes software developed by TooLs GmbH.
58 * 4. The name of TooLs GmbH may not be used to endorse or promote products
59 *    derived from this software without specific prior written permission.
60 *
61 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
64 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
65 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
66 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
67 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
68 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
69 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
70 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
71 */
72
73/*
74 * First try for the boot code
75 *
76 * Input syntax is:
77 *	[promdev[{:|,}partition]]/[filename] [flags]
78 */
79
80#define	ELFSIZE		32		/* We use 32-bit ELF. */
81
82#include <sys/param.h>
83#include <sys/exec.h>
84#include <sys/exec_elf.h>
85#include <sys/reboot.h>
86#include <sys/disklabel.h>
87#include <sys/boot_flag.h>
88
89#include <lib/libsa/stand.h>
90#include <lib/libsa/loadfile.h>
91#include <lib/libkern/libkern.h>
92
93#include <machine/cpu.h>
94
95#include "ofdev.h"
96#include "openfirm.h"
97
98#ifdef DEBUG
99# define DPRINTF printf
100#else
101# define DPRINTF while (0) printf
102#endif
103
104char bootdev[128];
105char bootfile[128];
106int boothowto;
107int debug;
108
109static ofw_version = 0;
110static char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL };
111
112static void
113prom2boot(dev)
114	char *dev;
115{
116	char *cp;
117
118	cp = dev + strlen(dev) - 1;
119	for (; *cp; cp--) {
120		if (*cp == ':') {
121			if (ofw_version < 3) {
122				/* sd@0:0 -> sd@0 */
123				*cp = 0;
124				break;
125			} else {
126				/* disk@0:5,boot -> disk@0:0 */
127				strcpy(cp, ":0");
128				break;
129			}
130		}
131	}
132}
133
134static void
135parseargs(str, howtop)
136	char *str;
137	int *howtop;
138{
139	char *cp;
140
141	/* Allow user to drop back to the PROM. */
142	if (strcmp(str, "exit") == 0)
143		OF_exit();
144
145	*howtop = 0;
146
147	cp = str;
148	if (*cp == '-')
149		goto found;
150	for (cp = str; *cp; cp++)
151		if (*cp == ' ')
152			goto found;
153	return;
154
155found:
156	*cp++ = 0;
157	while (*cp)
158		BOOT_FLAG(*cp++, *howtop);
159}
160
161static void
162chain(entry, args, ssym, esym)
163	void (*entry)();
164	char *args;
165	void *ssym, *esym;
166{
167	extern char end[];
168	int l;
169
170	/*
171	 * Stash pointer to end of symbol table after the argument
172	 * strings.
173	 */
174	l = strlen(args) + 1;
175	memcpy(args + l, &ssym, sizeof(ssym));
176	l += sizeof(ssym);
177	memcpy(args + l, &esym, sizeof(esym));
178	l += sizeof(esym);
179	l += sizeof(int);	/* XXX */
180
181	OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l);
182	panic("chain");
183}
184
185__dead void
186_rtt()
187{
188
189	OF_exit();
190}
191
192void
193main()
194{
195	extern char bootprog_name[], bootprog_rev[],
196		    bootprog_maker[], bootprog_date[];
197	int chosen, options, openprom;
198	char bootline[512];		/* Should check size? */
199	char *cp;
200	u_long marks[MARK_MAX];
201	u_int32_t entry;
202	void *ssym, *esym;
203
204	printf("\n");
205	printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
206	printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
207
208	/*
209	 * Figure out what version of Open Firmware...
210	 */
211	if ((openprom = OF_finddevice("/openprom")) != -1) {
212		char model[32];
213
214		memset(model, 0, sizeof model);
215		OF_getprop(openprom, "model", model, sizeof model);
216		for (cp = model; *cp; cp++)
217			if (*cp >= '0' && *cp <= '9') {
218				ofw_version = *cp - '0';
219				break;
220			}
221#if 0
222		printf(">> Open Firmware version %d.x\n", ofw_version);
223#endif
224	}
225
226	/*
227	 * Get the boot arguments from Openfirmware
228	 */
229	if ((chosen = OF_finddevice("/chosen")) == -1 ||
230	    OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
231	    OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
232		printf("Invalid Openfirmware environment\n");
233		OF_exit();
234	}
235
236	/*
237	 * Some versions of Openfirmware sets bootpath to "".
238	 * We use boot-device instead if it occurs.
239	 */
240	if (bootdev[0] == 0) {
241		printf("Cannot use bootpath\n");
242		if ((options = OF_finddevice("/options")) == -1 ||
243		    OF_getprop(options, "boot-device", bootdev,
244			       sizeof bootdev) < 0) {
245			printf("Invalid Openfirmware environment\n");
246			OF_exit();
247		}
248		printf("Using boot-device instead\n");
249	}
250
251	prom2boot(bootdev);
252	parseargs(bootline, &boothowto);
253	DPRINTF("bootline=%s\n", bootline);
254
255	for (;;) {
256		int i;
257
258		if (boothowto & RB_ASKNAME) {
259			printf("Boot: ");
260			gets(bootline);
261			parseargs(bootline, &boothowto);
262		}
263
264		if (bootline[0]) {
265			kernels[0] = bootline;
266			kernels[1] = NULL;
267		}
268
269		for (i = 0; kernels[i]; i++) {
270			DPRINTF("Trying %s\n", kernels[i]);
271
272			marks[MARK_START] = 0;
273			if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0)
274				goto loaded;
275		}
276		boothowto |= RB_ASKNAME;
277	}
278loaded:
279
280#ifdef	__notyet__
281	OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1);
282	cp = bootline;
283#else
284	strcpy(bootline, opened_name);
285	cp = bootline + strlen(bootline);
286	*cp++ = ' ';
287#endif
288	*cp = '-';
289	if (boothowto & RB_ASKNAME)
290		*++cp = 'a';
291	if (boothowto & RB_SINGLE)
292		*++cp = 's';
293	if (boothowto & RB_KDB)
294		*++cp = 'd';
295	if (*cp == '-')
296#ifdef	__notyet__
297		*cp = 0;
298#else
299		*--cp = 0;
300#endif
301	else
302		*++cp = 0;
303#ifdef	__notyet__
304	OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1);
305#endif
306
307	entry = marks[MARK_ENTRY];
308	ssym = (void *)marks[MARK_SYM];
309	esym = (void *)marks[MARK_END];
310
311	printf(" start=0x%x\n", entry);
312	__syncicache((void *)entry, (u_int)ssym - (u_int)entry);
313	chain((void *)entry, bootline, ssym, esym);
314
315	OF_exit();
316}
317