1 /*	$NetBSD: fileread_bfs.c,v 1.2 2008/04/28 20:23:18 martin 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
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, block_size, bfs_sector;
53 
54 	if (pdinfo->magic != PDINFO_MAGIC)
55 		return BERR_PDINFO;
56 	block_size = pdinfo->geometory.bytes_per_sector;
57 
58 #if 0
59 {
60 	char msg[] = "00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f";
61 	const char hex[] = "0123456789ABCDEF";
62 	u_int v;
63 	uint8_t *p = (void *)vtoc;
64 
65 	err = dk_read(pdinfo->logical_sector + VTOC_SECTOR, 1, vtoc);
66 	for (n = 0; n < 16; n++) {
67 		for (i = 0; i < 16; i++) {
68 			v = (*p >> 4) & 0x0f;
69 			msg[i*3] = hex[v];
70 			v = *p & 0x0f;
71 			msg[i*3+1] = hex[v];
72 			p++;
73 		}
74 		for (i = 0; msg[i] != 0; i++)
75 			ROM_PUTC(32 + i * 12, 0 + n * 24, msg[i]);
76 		ROM_PUTC(0, 0 + n * 24, '\r');
77 		ROM_PUTC(0, 0 + n * 24, '\n');
78 	}
79 }
80 #endif
81 	/* Read VTOC */
82 	err = dk_read(pdinfo->logical_sector + VTOC_SECTOR, 1, vtoc);
83 	if ((err & 0x7f) != 0)
84 		return BERR_RDVTOC;
85 
86 	if (vtoc->magic != VTOC_MAGIC)
87 		return BERR_VTOC;
88 
89 	/* Find BFS */
90 	for (i = 0; i < VTOC_MAXPARTITIONS; i++, partition++)
91 		if (partition->tag == VTOC_TAG_STAND)
92 			break;
93 
94 	if (i == VTOC_MAXPARTITIONS)
95 		return BERR_NOBFS;
96 	bfs_sector = pdinfo->logical_sector + partition->start_sector;
97 
98 	/* Read inode */
99 	err = dk_read(bfs_sector + 1/* skip super block */, 1, inode);
100 	if ((err & 0x7f) != 0)
101 		return BERR_RDINODE;
102 
103 	if (inode->number != BFS_ROOT_INODE)
104 		return BERR_NOROOT;
105 
106 	/* Read root directory */
107 	n = inode->eof_offset_byte - inode->start_sector * 512 + 1;
108 
109 	err = dk_read(bfs_sector + inode->start_sector, 1, dirent);
110 	if ((err & 0x7f) != 0)
111 		return BERR_RDDIRENT;
112 
113 	n /= sizeof(struct bfs_dirent);
114 	DPRINTF("%d files.\n", n);
115 	for (i = 0; i < n; i++, dirent++)
116 		if (strcmp(dirent->name, fname) == 0)
117 			break;
118 
119 	if (i == n)
120 		return BERR_NOFILE;
121 
122 	/* Read file */
123 	DPRINTF("%s (%d)\n", dirent->name, dirent->inode);
124 	inode = &inode[dirent->inode - BFS_ROOT_INODE];
125 
126 	err = dk_read(bfs_sector + inode->start_sector,
127 	    inode->end_sector - inode->start_sector + 1,
128 	    (void *)SDBOOT_SCRATCHADDR);
129 
130 	if ((err & 0x7f) != 0)
131 		return BERR_RDFILE;
132 
133 	*size = inode->eof_offset_byte - inode->start_sector * 512 + 1;
134 	DPRINTF("read %dbyte\n", *size);
135 
136 	return 0;
137 }
138