1 /* $NetBSD: fileread_ustarfs.c,v 1.3 2008/04/28 20:23:18 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2004 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 #ifdef _STANDALONE
33 #include <lib/libsa/stand.h>
34 #include <lib/libkern/libkern.h>
35 #endif
36
37 #include <sys/types.h>
38 #include <sys/param.h>
39 #include "bootxx.h"
40
41 #include <machine/sector.h>
42 #include <machine/sbd.h>
43
44 int ustar_size(const char *);
45
46 int
fileread(const char * fname,size_t * size)47 fileread(const char *fname, size_t *size)
48 {
49 uint8_t *p = (void *)SDBOOT_PDINFOADDR;
50
51 if (dk_read(16, 1, p) != 0)
52 return BERR_TARHDR;
53
54 if (((*(uint32_t *)(p + 256)) & 0xffffff) != 0x757374)
55 return BERR_TARMAGIC;
56
57 *size = ustar_size((const char *)(p + 124));
58 if (dk_read(17, ROUND_SECTOR(*size) >> DEV_BSHIFT,
59 (void *)SDBOOT_SCRATCHADDR) != 0)
60 return BERR_RDFILE;
61
62 return 0;
63 }
64
65 int
ustar_size(const char * p)66 ustar_size(const char *p)
67 {
68 int i, j, k;
69
70 for (i = 0, j = 0, k = 1, p += 10; i < 11; i++, p--, k *= 8)
71 j += (*p - '0') * k;
72
73 return j;
74 }
75