Annotation of sys/arch/mvmeppc/stand/bootxx/bootxx.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bootxx.c,v 1.2 2002/03/14 03:15:58 millert 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: int 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:
71: main()
72: {
73: struct open_file f;
74: char *addr;
75: int n, error;
76:
77: bootdev_type = BUGDEV_DISK;
78:
79: printf("Boot: bug device: ctrl=%d, dev=%d\n",
80: bugargs.ctrl_lun, bugargs.dev_lun);
81: printf("\nbootxx: first level bootstrap program [%s]\n\n", version);
82:
83: f.f_flags = F_RAW;
84: if (devopen(&f, 0, &addr)) {
85: printf("bootxx: open failed\n");
86: _rtt();
87: }
88:
89: addr = (char *)STAGE2_RELOC;
90: error = copyboot(&f, addr);
91: f.f_dev->dv_close(&f);
92: if (!error) {
93: bugexec((void (*)())addr);
94: }
95: /* copyboot had a problem... */
96: _rtt();
97: }
98:
99: int
100: copyboot(fp, addr)
101: struct open_file *fp;
102: char *addr;
103: {
104: int n, i, blknum;
105: struct exec *x;
106:
107: addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
108: x = (struct exec *)addr;
109:
110: if (!block_count) {
111: printf("bootxx: no data!?!\n");
112: return -1;
113: }
114:
115: for (i = 0; i < block_count; i++) {
116:
117: if ((blknum = block_table[i]) == 0)
118: break;
119:
120: #ifdef DEBUG
121: printf("bootxx: read block # %d = %d\n", i, blknum);
122: #endif
123: if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
124: blknum, block_size, addr, &n))
125: {
126: printf("bootxx: read failed\n");
127: return -1;
128: }
129: if (n != block_size) {
130: printf("bootxx: short read\n");
131: return -1;
132: }
133: addr += block_size;
134: }
135:
136: if (N_GETMAGIC(*x) != OMAGIC) {
137: printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
138: return(-1);
139: }
140:
141: return 0;
142: }
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