83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
/*
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* \brief Back-end header
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* \author Sebastian Sumpf
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* \date 2011-05-30
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*/
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/*
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* Copyright (C) 2011-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _PART_BLK_H_
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#define _PART_BLK_H_
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#include <base/exception.h>
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#include <base/stdint.h>
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namespace Partition {
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enum {
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MAX_PARTITIONS = 32, /* maximum supported paritions */
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MAX_PACKET_SIZE = 1024 * 1024
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};
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/**
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* The partition type
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*/
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struct Partition
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{
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Genode::uint32_t _lba; /* logical block address on device */
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Genode::uint32_t _sectors; /* number of sectors in patitions */
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Partition(Genode::uint32_t lba, Genode::uint32_t sectors)
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: _lba(lba), _sectors(sectors) { }
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/**
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* Write/read blocks
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*
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* \param block_nr block number of partition to access
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* \param count number of blocks to read/write
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* \param buf buffer which containing the data to write or which is
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* filled by reads
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* \param write true for a write operations, false for a read
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* \throw Io_error
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*/
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void io(unsigned long block_nr, unsigned long count, void *buf, bool write = false);
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};
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/**
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* Excpetions
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*/
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class Io_error : public Genode::Exception {};
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/**
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* Initialize the back-end and parse partitions information
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*
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* \throw Io_error
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*/
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void init();
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/**
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* Return partition information
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*
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* \param num partition number
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* \return pointer to partition if it could be found, zero otherwise
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*/
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Partition *partition(int num);
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/**
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* Returns block size of back end
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*/
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Genode::size_t blk_size();
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/**
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* Synchronize with backend device
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*/
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void sync();
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}
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#endif /* _PART_BLK_H_ */
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