Annotation of sys/arch/mvme88k/stand/bootxx/bootxx.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bootxx.c,v 1.6 2006/05/16 22:52:09 miod Exp $ */
2:
3: /*
4: * Copyright (c) 1994 Paul Kranenburg
5: * 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 Paul Kranenburg.
18: * 4. The name of the author may not be used to endorse or promote products
19: * derived from this software without specific prior written permission
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: /*
34: * This is a generic "first-stage" boot program.
35: *
36: * Note that this program has absolutely no filesystem knowledge!
37: *
38: * Instead, this uses a table of disk block numbers that are
39: * filled in by the installboot program such that this program
40: * can load the "second-stage" boot program.
41: */
42:
43: #include <sys/param.h>
44: #include <sys/time.h>
45: #include <sys/exec.h>
46: #include <machine/prom.h>
47:
48: #include "stand.h"
49: #include "libsa.h"
50:
51: /*
52: * Boot device is derived from ROM provided information.
53: */
54:
55: /* This determines the largest boot program we can load. */
56: #define MAXBLOCKNUM 64
57:
58: /*
59: * These three names are known by installboot.
60: * The block_table contains starting block numbers,
61: * in terms of 512-byte blocks. Each non-zero value
62: * will result in a read of block_size bytes.
63: */
64: size_t block_size = 512; /* default */
65: int block_count = MAXBLOCKNUM; /* length of table */
66: daddr_t block_table[MAXBLOCKNUM] = { 0 };
67:
68: extern char *version;
69:
70: int copyboot(struct open_file *, char *);
71:
72: int
73: main()
74: {
75: struct open_file f;
76: char *addr;
77: int error;
78:
79: printf("\nbootxx: first level bootstrap program [%s]\n", version);
80: #ifdef DEBUG
81: printf("boot device: ctrl=%d, dev=%d\n",
82: bugargs.ctrl_lun, bugargs.dev_lun);
83: #endif
84:
85: f.f_flags = F_RAW;
86: if (devopen(&f, 0, &addr)) {
87: printf("bootxx: open failed\n");
88: _rtt();
89: }
90:
91: addr = (char *)STAGE2_RELOC;
92: error = copyboot(&f, addr);
93: f.f_dev->dv_close(&f);
94: if (!error) {
95: bugexec((void (*)())addr + 8);
96: }
97: /* copyboot had a problem... */
98: _rtt();
99: return (0);
100: }
101:
102: int
103: copyboot(struct open_file *fp, char *addr)
104: {
105: size_t n;
106: int i, blknum;
107: struct exec *x;
108:
109: addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
110: x = (struct exec *)addr;
111:
112: if (!block_count) {
113: printf("bootxx: no data!?!\n");
114: return -1;
115: }
116:
117: for (i = 0; i < block_count; i++) {
118:
119: if ((blknum = block_table[i]) == 0)
120: break;
121:
122: #ifdef DEBUG
123: printf("bootxx: read block # %d = %d\n", i, blknum);
124: #endif
125: if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
126: blknum, block_size, addr, &n)) {
127: printf("bootxx: read failed\n");
128: return -1;
129: }
130: if (n != block_size) {
131: printf("bootxx: short read\n");
132: return -1;
133: }
134: addr += block_size;
135: }
136:
137: if (N_GETMAGIC(*x) != OMAGIC) {
138: printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
139: return(-1);
140: }
141:
142: return 0;
143: }
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