1 /* $NetBSD: fileread_bfs.c,v 1.3 2014/01/22 16:27:01 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2004, 2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
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 #include <lib/libsa/stand.h>
33 #include <lib/libkern/libkern.h>
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include "bootxx.h"
38
39 #include <machine/pdinfo.h>
40 #include <machine/vtoc.h>
41 #include <machine/bfs.h>
42 #include <machine/sbd.h>
43
44 int
fileread(const char * fname,size_t * size)45 fileread(const char *fname, size_t *size)
46 {
47 struct pdinfo_sector *pdinfo = (void *)SDBOOT_PDINFOADDR;
48 struct vtoc_sector *vtoc = (void *)SDBOOT_VTOCADDR;
49 struct ux_partition *partition = vtoc->partition;
50 struct bfs_inode *inode = (void *)SDBOOT_INODEADDR;
51 struct bfs_dirent *dirent = (void *)SDBOOT_DIRENTADDR;
52 int i, n, err, bfs_sector;
53
54 if (pdinfo->magic != PDINFO_MAGIC)
55 return BERR_PDINFO;
56
57 #if 0
58 {
59 char msg[] = "00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f";
60 const char hex[] = "0123456789ABCDEF";
61 u_int v;
62 uint8_t *p = (void *)vtoc;
63
64 err = dk_read(pdinfo->logical_sector + VTOC_SECTOR, 1, vtoc);
65 for (n = 0; n < 16; n++) {
66 for (i = 0; i < 16; i++) {
67 v = (*p >> 4) & 0x0f;
68 msg[i*3] = hex[v];
69 v = *p & 0x0f;
70 msg[i*3+1] = hex[v];
71 p++;
72 }
73 for (i = 0; msg[i] != 0; i++)
74 ROM_PUTC(32 + i * 12, 0 + n * 24, msg[i]);
75 ROM_PUTC(0, 0 + n * 24, '\r');
76 ROM_PUTC(0, 0 + n * 24, '\n');
77 }
78 }
79 #endif
80 /* Read VTOC */
81 err = dk_read(pdinfo->logical_sector + VTOC_SECTOR, 1, vtoc);
82 if ((err & 0x7f) != 0)
83 return BERR_RDVTOC;
84
85 if (vtoc->magic != VTOC_MAGIC)
86 return BERR_VTOC;
87
88 /* Find BFS */
89 for (i = 0; i < VTOC_MAXPARTITIONS; i++, partition++)
90 if (partition->tag == VTOC_TAG_STAND)
91 break;
92
93 if (i == VTOC_MAXPARTITIONS)
94 return BERR_NOBFS;
95 bfs_sector = pdinfo->logical_sector + partition->start_sector;
96
97 /* Read inode */
98 err = dk_read(bfs_sector + 1/* skip super block */, 1, inode);
99 if ((err & 0x7f) != 0)
100 return BERR_RDINODE;
101
102 if (inode->number != BFS_ROOT_INODE)
103 return BERR_NOROOT;
104
105 /* Read root directory */
106 n = inode->eof_offset_byte - inode->start_sector * 512 + 1;
107
108 err = dk_read(bfs_sector + inode->start_sector, 1, dirent);
109 if ((err & 0x7f) != 0)
110 return BERR_RDDIRENT;
111
112 n /= sizeof(struct bfs_dirent);
113 DPRINTF("%d files.\n", n);
114 for (i = 0; i < n; i++, dirent++)
115 if (strcmp(dirent->name, fname) == 0)
116 break;
117
118 if (i == n)
119 return BERR_NOFILE;
120
121 /* Read file */
122 DPRINTF("%s (%d)\n", dirent->name, dirent->inode);
123 inode = &inode[dirent->inode - BFS_ROOT_INODE];
124
125 err = dk_read(bfs_sector + inode->start_sector,
126 inode->end_sector - inode->start_sector + 1,
127 (void *)SDBOOT_SCRATCHADDR);
128
129 if ((err & 0x7f) != 0)
130 return BERR_RDFILE;
131
132 *size = inode->eof_offset_byte - inode->start_sector * 512 + 1;
133 DPRINTF("read %dbyte\n", *size);
134
135 return 0;
136 }
137