jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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 are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <Kernel/Devices/BlockDevice.h>
28
29namespace Kernel {
30
31BlockDevice::~BlockDevice()
32{
33}
34
35bool BlockDevice::read_block(unsigned index, u8* buffer) const
36{
37 return const_cast<BlockDevice*>(this)->read_blocks(index, 1, buffer);
38}
39
40bool BlockDevice::write_block(unsigned index, const u8* data)
41{
42 return write_blocks(index, 1, data);
43}
44
45bool BlockDevice::read_raw(u32 offset, unsigned length, u8* out) const
46{
47 ASSERT((offset % block_size()) == 0);
48 ASSERT((length % block_size()) == 0);
49 u32 first_block = offset / block_size();
50 u32 end_block = (offset + length) / block_size();
51 return const_cast<BlockDevice*>(this)->read_blocks(first_block, end_block - first_block, out);
52}
53
54bool BlockDevice::write_raw(u32 offset, unsigned length, const u8* in)
55{
56 ASSERT((offset % block_size()) == 0);
57 ASSERT((length % block_size()) == 0);
58 u32 first_block = offset / block_size();
59 u32 end_block = (offset + length) / block_size();
60 ASSERT(first_block <= 0xffffffff);
61 ASSERT(end_block <= 0xffffffff);
62 return write_blocks(first_block, end_block - first_block, in);
63}
64
65}