1/*-
2 * Copyright (c) 2011 Google, Inc.
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <stand.h>
31
32#include "libuserboot.h"
33
34ssize_t
35userboot_copyin(const void *src, vm_offset_t va, size_t len)
36{
37
38        CALLBACK(copyin, src, va, len);
39	return (len);
40}
41
42ssize_t
43userboot_copyout(vm_offset_t va, void *dst, size_t len)
44{
45
46	CALLBACK(copyout, va, dst, len);
47	return (len);
48}
49
50ssize_t
51userboot_readin(int fd, vm_offset_t va, size_t len)
52{
53	ssize_t res, s;
54	size_t sz;
55	char buf[4096];
56
57	res = 0;
58	while (len > 0) {
59		sz = len;
60		if (sz > sizeof(buf))
61			sz = sizeof(buf);
62		s = read(fd, buf, sz);
63		if (s == 0)
64			break;
65		if (s < 0)
66			return (s);
67		CALLBACK(copyin, buf, va, s);
68		len -= s;
69		res += s;
70		va += s;
71	}
72	return (res);
73}
74