1/*	$NetBSD: boot.c,v 1.19 2014/03/28 11:49:40 ozaki-r Exp $	*/
2
3/*-
4 * Copyright (c) 1999 Izumi Tsutsui.  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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27/*-
28 * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
29 *
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
32 * are met:
33 * 1. Redistributions of source code must retain the above copyright
34 *    notice, this list of conditions and the following disclaimer.
35 * 2. Redistributions in binary form must reproduce the above copyright
36 *    notice, this list of conditions and the following disclaimer in the
37 *    documentation and/or other materials provided with the distribution.
38 * 3. The name of the author may not be used to endorse or promote products
39 *    derived from this software without specific prior written permission.
40 *
41 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
42 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
44 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
45 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
47 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
48 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
49 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
50 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 */
52
53#include <lib/libkern/libkern.h>
54#include <lib/libsa/stand.h>
55#include <lib/libsa/loadfile.h>
56
57#include <machine/romcall.h>
58
59void boot(uint32_t, uint32_t, uint32_t, uint32_t);
60extern void ICIA(void);
61
62/* version strings in vers.c (generated by newvers.sh) */
63extern const char bootprog_name[];
64extern const char bootprog_rev[];
65extern const char bootprog_kernrev[];
66
67char *devs[] = { "hd", "fh", "fd", NULL, NULL, "rd", "st" };
68char *kernels[] = { "/netbsd", "/netbsd.gz", NULL };
69
70#ifdef BOOT_DEBUG
71# define DPRINTF printf
72#else
73# define DPRINTF while (0) printf
74#endif
75
76void
77boot(uint32_t d4, uint32_t d5, uint32_t d6, uint32_t d7)
78{
79	int fd, i;
80	int ctlr, unit, part, type;
81	uint32_t bootdev = d6;
82	char *netbsd = (char *)d5;
83	u_long marks[MARK_MAX];
84	static char devname[32], file[32];
85	void (*entry)(void);
86	int loadflag;
87
88	printf("%s Secondary Boot, Revision %s (from NetBSD %s)\n",
89	    bootprog_name, bootprog_rev, bootprog_kernrev);
90
91	/* bootname is "boot" by default. */
92	if (netbsd == NULL || strcmp(netbsd, "boot") == 0 ||
93			      strcmp(netbsd, "/boot") == 0)
94		netbsd = "";
95
96	DPRINTF("howto = 0x%x\n", d7);
97	DPRINTF("bootdev = 0x%x\n", bootdev);
98	DPRINTF("bootname = %s\n", netbsd);
99	DPRINTF("maxmem = 0x%x\n", d4);
100
101#define	SET_MAGIC(bootdev, magic) ((bootdev & 0x0fffffff)| (magic << 28))
102	/* PROM monitor passes 0xa, but NEWS-OS /boot passed 0x5... */
103	bootdev = SET_MAGIC(bootdev, 5);
104
105	ctlr = BOOTDEV_CTLR(bootdev);
106	unit = BOOTDEV_UNIT(bootdev);
107	part = BOOTDEV_PART(bootdev);
108	type = BOOTDEV_TYPE(bootdev);
109
110	marks[MARK_START] = 0;
111
112	if (devs[type] == NULL) {
113		printf("unknown bootdev (0x%x)\n", bootdev);
114		return;
115	}
116
117	snprintf(devname, sizeof(devname),
118	    "%s(%d,%d,%d)", devs[type], ctlr, unit, part);
119	printf("Booting %s%s\n", devname, netbsd);
120
121	/* use user specified kernel name if exists */
122	if (*netbsd) {
123		kernels[0] = netbsd;
124		kernels[1] = NULL;
125	}
126
127	loadflag = LOAD_KERNEL;
128	if (devname[0] == 'f')	/* XXX */
129		loadflag &= ~LOAD_BACKWARDS;
130
131	for (i = 0; kernels[i]; i++) {
132		snprintf(file, sizeof(file), "%s%s", devname, kernels[i]);
133		DPRINTF("trying %s...\n", file);
134		fd = loadfile(file, marks, loadflag);
135		if (fd != -1)
136			break;
137	}
138	if (kernels[i] == NULL) {
139#if 0 /* bootxx() may be overrided by loaded kernel */
140		return;
141#else
142		rom_halt();
143		/* NOTREACHED */
144#endif
145	}
146
147	DPRINTF("entry = 0x%x\n", (int)marks[MARK_ENTRY]);
148	DPRINTF("ssym = 0x%x\n", (int)marks[MARK_SYM]);
149	DPRINTF("esym = 0x%x\n", (int)marks[MARK_END]);
150
151	entry = (void *)marks[MARK_ENTRY];
152
153	printf("\n");
154
155	ICIA();
156	__asm volatile ("movl %0,%%d7" : : "m" (d7));
157	__asm volatile ("movl %0,%%d6" : : "m" (bootdev));
158	__asm volatile ("movl %0,%%d5" : : "m" (netbsd));
159	__asm volatile ("movl %0,%%d4" : : "m" (d4));
160	__asm volatile ("movl %0,%%d2" : : "m" (marks[MARK_END]));
161	(*entry)();
162}
163
164void
165_rtt(void)
166{
167
168	rom_halt();
169	for (;;)
170		;
171	/* NOTREACHED */
172}
173