xref: /netbsd/sys/arch/mipsco/stand/common/bootxx.c (revision 6550d01e)
1 /*	$NetBSD: bootxx.c,v 1.9 2009/03/14 21:04:12 dsl Exp $	*/
2 
3 /*-
4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Jonathan Stone, Michael Hitch, Simon Burge and Wayne Knowles.
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  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 /*
33  * Copyright (c) 1992, 1993
34  *	The Regents of the University of California.  All rights reserved.
35  *
36  * This code is derived from software contributed to Berkeley by
37  * Ralph Campbell.
38  *
39  * Redistribution and use in source and binary forms, with or without
40  * modification, are permitted provided that the following conditions
41  * are met:
42  * 1. Redistributions of source code must retain the above copyright
43  *    notice, this list of conditions and the following disclaimer.
44  * 2. Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in the
46  *    documentation and/or other materials provided with the distribution.
47  * 3. Neither the name of the University nor the names of its contributors
48  *    may be used to endorse or promote products derived from this software
49  *    without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61  * SUCH DAMAGE.
62  *
63  *	@(#)boot.c	8.1 (Berkeley) 6/10/93
64  */
65 
66 #include <sys/param.h>
67 #include <sys/exec_elf.h>
68 #include <lib/libsa/stand.h>
69 #include <machine/prom.h>
70 
71 typedef void (*entrypt)(int, char **, int, const void *);
72 
73 int main(int, char **);
74 entrypt loadfile(char *path, char *name);
75 
76 /*
77  * This gets arguments from the PROM, calls other routines to open
78  * and load the secondary boot loader called boot, and then transfers
79  * execution to that program.
80  */
81 int
82 main(int argc, char **argv)
83 {
84 	entrypt entry;
85 	char *cp;
86 	extern void prom_init(void);
87 
88 	prom_init();
89 
90 	cp = *argv;
91 
92         printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n");
93 
94 	entry = loadfile(cp, "/boot");
95 	if ((int)entry != -1)
96 		goto goodload;
97 
98 	entry = loadfile(cp, "/boot.mipsco");
99 	if ((int)entry != -1)
100 		goto goodload;
101 
102 	goto bad;
103 
104  goodload:
105 	MIPS_PROM(flushcache)();
106 	entry(argc, argv, 0, 0);
107 
108  bad:
109 	return (1);
110 }
111 
112 /*
113  * Open 'filename', read in program and return the entry point or -1 if error.
114  */
115 entrypt
116 loadfile(char *path, char *name)
117 {
118 	int fd, i;
119 	char *src, *dst, bootfname[64];
120 	Elf32_Ehdr ehdr;
121 	Elf32_Phdr phdr;
122 
123 	dst = bootfname;
124 	for (src = path; *src;/**/)
125 		if ((*dst++ = *src++) == ')')
126 			break;
127 	for (src = name; *src;/**/)
128 		*dst++ = *src++;
129 	*dst = (char) 0;
130 
131 	if ((fd = open(bootfname, 0)) < 0) {
132 		printf("open %s: %d\n", bootfname, errno);
133 		goto err;
134 	}
135 
136 	/* read the exec header */
137 	i = read(fd, (char *)&ehdr, sizeof(ehdr));
138 	if ((i != sizeof(ehdr)) ||
139 	    (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) ||
140 	    (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) {
141 		printf("%s: No ELF header\n", bootfname);
142 		goto cerr;
143 	}
144 
145 	for (i = 0; i < ehdr.e_phnum; i++) {
146 		if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0)
147 			goto cerr;
148 		if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr))
149 			goto cerr;
150 		if (phdr.p_type != PT_LOAD)
151 			continue;
152 		if (lseek(fd, (off_t)phdr.p_offset, 0) < 0)
153 			goto cerr;
154 		if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz)
155 			goto cerr;
156 	}
157 	return ((entrypt)ehdr.e_entry);
158 
159  cerr:
160 #ifndef LIBSA_NO_FS_CLOSE
161 	(void) close(fd);
162 #endif
163  err:
164 	printf("Can't load '%s'\n", bootfname);
165 	return ((entrypt)-1);
166 }
167