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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Devices/DiskDevice.h>
DiskDevice::DiskDevice(int major, int minor, size_t block_size)
: BlockDevice(major, minor, block_size)
{
}
DiskDevice::~DiskDevice()
{
}
bool DiskDevice::read(DiskOffset offset, unsigned length, u8* out) const
{
ASSERT((offset % block_size()) == 0);
ASSERT((length % block_size()) == 0);
u32 first_block = offset / block_size();
u32 end_block = (offset + length) / block_size();
return const_cast<DiskDevice*>(this)->read_blocks(first_block, end_block - first_block, out);
}
bool DiskDevice::write(DiskOffset offset, unsigned length, const u8* in)
{
ASSERT((offset % block_size()) == 0);
ASSERT((length % block_size()) == 0);
u32 first_block = offset / block_size();
u32 end_block = (offset + length) / block_size();
ASSERT(first_block <= 0xffffffff);
ASSERT(end_block <= 0xffffffff);
return write_blocks(first_block, end_block - first_block, in);
}
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