1 /* $NetBSD: skifs.c,v 1.4 2009/07/20 04:59:04 kiyohara Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Doug Rabson
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 /* __FBSDID("$FreeBSD: src/sys/boot/ia64/libski/skifs.c,v 1.2 2003/09/08 09:11:32 obrien Exp $"); */
31
32 #include <sys/param.h>
33 #include <sys/time.h>
34 #include <lib/libsa/stand.h>
35 #include <lib/libsa/loadfile.h>
36
37 #include "bootstrap.h"
38 #include "libski.h"
39
40 struct disk_req {
41 unsigned long addr;
42 unsigned len;
43 };
44
45 struct disk_stat {
46 int fd;
47 unsigned count;
48 };
49
50 int
skifs_open(const char * path,struct open_file * f)51 skifs_open(const char *path, struct open_file *f)
52 {
53 int fd;
54
55 /*
56 * Skip leading '/' so that our pretend filesystem starts in
57 * the current working directory.
58 */
59 while (*path == '/')
60 path++;
61
62 fd = ssc((u_int64_t) path, 1, 0, 0, SSC_OPEN);
63
64 if (fd > 0) {
65 f->f_fsdata = (void*)(u_int64_t) fd;
66 return 0;
67 }
68 return ENOENT;
69 }
70
71 int
skifs_close(struct open_file * f)72 skifs_close(struct open_file *f)
73 {
74 ssc((u_int64_t) f->f_fsdata, 0, 0, 0, SSC_CLOSE);
75 return 0;
76 }
77
78 int
skifs_read(struct open_file * f,void * buf,size_t size,size_t * resid)79 skifs_read(struct open_file *f, void *buf, size_t size, size_t *resid)
80 {
81 struct disk_req req;
82 struct disk_stat stat;
83
84 req.len = size;
85 req.addr = (u_int64_t) buf;
86 ssc((u_int64_t) f->f_fsdata, 1, (u_int64_t) &req, f->f_offset, SSC_READ);
87 stat.fd = (u_int64_t) f->f_fsdata;
88 ssc((u_int64_t)&stat, 0, 0, 0, SSC_WAIT_COMPLETION);
89
90 *resid = size - stat.count;
91 f->f_offset += stat.count;
92 return 0;
93 }
94
95 off_t
skifs_seek(struct open_file * f,off_t offset,int where)96 skifs_seek(struct open_file *f, off_t offset, int where)
97 {
98 u_int64_t base;
99
100 switch (where) {
101 case SEEK_SET:
102 base = 0;
103 break;
104
105 case SEEK_CUR:
106 base = f->f_offset;
107 break;
108
109 case SEEK_END:
110 printf("can't find end of file in SKI\n");
111 base = f->f_offset;
112 break;
113 }
114
115 f->f_offset = base + offset;
116 return base;
117 }
118
119 int
skifs_stat(struct open_file * f,struct stat * sb)120 skifs_stat(struct open_file *f, struct stat *sb)
121 {
122 memset(sb, 0, sizeof(*sb));
123 sb->st_mode = S_IFREG | S_IRUSR;
124 return 0;
125 }
126
127 int
skifs_readdir(struct open_file * f,struct dirent * d)128 skifs_readdir(struct open_file *f, struct dirent *d)
129 {
130 return ENOENT;
131 }
132
133 int
skifs_dev_init(void)134 skifs_dev_init(void)
135 {
136 return 0;
137 }
138
139 /*
140 * Print information about disks
141 */
142 void
skifs_dev_print(int verbose)143 skifs_dev_print(int verbose)
144 {
145 }
146
147 /*
148 * Attempt to open the disk described by (dev) for use by (f).
149 *
150 * Note that the philosophy here is "give them exactly what
151 * they ask for". This is necessary because being too "smart"
152 * about what the user might want leads to complications.
153 * (eg. given no slice or partition value, with a disk that is
154 * sliced - are they after the first BSD slice, or the DOS
155 * slice before it?)
156 */
157 int
skifs_dev_open(struct open_file * f,...)158 skifs_dev_open(struct open_file *f, ...)
159 {
160 return 0;
161 }
162
163 int
skifs_dev_close(struct open_file * f)164 skifs_dev_close(struct open_file *f)
165 {
166
167 return 0;
168 }
169
170 int
skifs_dev_strategy(void * devdata,int rw,daddr_t dblk,size_t size,void * buf,size_t * rsize)171 skifs_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size, void *buf, size_t *rsize)
172 {
173 return 0;
174 }
175
176