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 <stand.h>
28
29#include "libuserboot.h"
30
31ssize_t
32userboot_copyin(const void *src, vm_offset_t va, size_t len)
33{
34
35        CALLBACK(copyin, src, va, len);
36	return (len);
37}
38
39ssize_t
40userboot_copyout(vm_offset_t va, void *dst, size_t len)
41{
42
43	CALLBACK(copyout, va, dst, len);
44	return (len);
45}
46
47ssize_t
48userboot_readin(readin_handle_t fd, vm_offset_t va, size_t len)
49{
50	ssize_t res, s;
51	size_t sz;
52	char buf[4096];
53
54	res = 0;
55	while (len > 0) {
56		sz = len;
57		if (sz > sizeof(buf))
58			sz = sizeof(buf);
59		s = VECTX_READ(fd, buf, sz);
60		if (s == 0)
61			break;
62		if (s < 0)
63			return (s);
64		CALLBACK(copyin, buf, va, s);
65		len -= s;
66		res += s;
67		va += s;
68	}
69	return (res);
70}
71