ofw_disk.c revision 106738 
1/*
2 * Copyright (C) 2000 Benno Rice.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/boot/ofw/libofw/ofw_disk.c 106738 2002-11-10 19:17:36Z jake $
26 */
27
28/*
29 * Disk I/O routines using Open Firmware
30 */
31
32#include <sys/param.h>
33#include <sys/disklabel.h>
34
35#include <netinet/in.h>
36
37#include <machine/stdarg.h>
38
39#include <stand.h>
40
41#include "bootstrap.h"
42#include "libofw.h"
43
44static int	ofwd_init(void);
45static int	ofwd_strategy(void *devdata, int flag, daddr_t dblk,
46				size_t size, char *buf, size_t *rsize);
47static int	ofwd_open(struct open_file *f, ...);
48static int	ofwd_close(struct open_file *f);
49static int	ofwd_ioctl(struct open_file *f, u_long cmd, void *data);
50static void	ofwd_print(int verbose);
51
52struct devsw ofwdisk = {
53	"block",
54	DEVT_DISK,
55	ofwd_init,
56	ofwd_strategy,
57	ofwd_open,
58	ofwd_close,
59	ofwd_ioctl,
60	ofwd_print
61};
62
63static int
64ofwd_init(void)
65{
66	return 0;
67}
68
69static int
70ofwd_strategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf,
71    size_t *rsize)
72{
73	struct ofw_devdesc *dp = (struct ofw_devdesc *)devdata;
74	unsigned long pos;
75	int n;
76	int i, j;
77
78	pos = dblk * 512;
79	do {
80		if (OF_seek(dp->d_handle, pos) < 0)
81			return EIO;
82		n = OF_read(dp->d_handle, buf, size);
83		if (n < 0 && n != -2)
84			return EIO;
85	} while (n == -2);
86	*rsize = size;
87	return 0;
88}
89
90static int
91ofwd_open(struct open_file *f, ...)
92{
93	struct ofw_devdesc *dp;
94	phandle_t handle;
95	va_list vl;
96
97	va_start(vl, f);
98	dp = va_arg(vl, struct ofw_devdesc *);
99	va_end(vl);
100	if ((handle = OF_open(dp->d_path)) == -1) {
101		printf("ofwd_open: Could not open %s\n", dp->d_path);
102		return 1;
103	}
104	dp->d_handle = handle;
105	return 0;
106}
107
108static int
109ofwd_close(struct open_file *f)
110{
111	struct ofw_devdesc *dev = f->f_devdata;
112
113	OF_close(dev->d_handle);
114	return 0;
115}
116
117static int
118ofwd_ioctl(struct open_file *f, u_long cmd, void *data)
119{
120
121	return (EINVAL);
122}
123
124static void
125ofwd_print(int verbose)
126{
127}
128