9b7e0ce0a5
The GUID partition table (GPT) is primarily used by systems using (U)EFI and is a replacement for the legacy MBR. For now, the current implementation is able to address up to 128 GUID partition entries (GPE). To enable the GPT support in 'part_blk' it has to be configured accrodingly: ! <start name="part_blk"> ! [...] ! <config use_gpt="yes"> ! [...] ! </start> If 'part_blk' is not able to find a valid GPT header it falls back to using the MBR. Current limitations: Since no endian conversion takes place it only works on LE platforms and of all characters in the UTF-16 encoded name field of an entry only the ones included in the ASCII encoding are printed. It also ignores all GPE attributes. Issue #1429.
77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
/*
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* \brief Partition table definitions
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* \author Sebastian Sumpf
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* \author Stefan Kalkowski
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* \date 2013-12-04
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*/
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/*
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* Copyright (C) 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__PARTITION_TABLE_H_
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#define _PART_BLK__PARTITION_TABLE_H_
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#include <base/env.h>
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#include <base/printf.h>
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#include <block_session/client.h>
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#include "driver.h"
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namespace Block {
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struct Partition;
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class Partition_table;
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}
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struct Block::Partition
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{
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Genode::uint64_t lba; /* logical block address on device */
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Genode::uint64_t sectors; /* number of sectors in patitions */
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Partition(Genode::uint64_t l, Genode::uint64_t s)
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: lba(l), sectors(s) { }
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};
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struct Block::Partition_table
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{
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class Sector
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{
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private:
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Session_client &_session;
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Packet_descriptor _p;
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public:
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Sector(unsigned long blk_nr,
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unsigned long count,
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bool write = false)
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: _session(Driver::driver().session()),
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_p(_session.dma_alloc_packet(Driver::driver().blk_size() * count),
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write ? Packet_descriptor::WRITE : Packet_descriptor::READ,
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blk_nr, count)
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{
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_session.tx()->submit_packet(_p);
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_p = _session.tx()->get_acked_packet();
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if (!_p.succeeded())
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PERR("Could not access block %llu", _p.block_number());
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}
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~Sector() { _session.tx()->release_packet(_p); }
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template <typename T> T addr() {
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return reinterpret_cast<T>(_session.tx()->packet_content(_p)); }
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};
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virtual Partition *partition(int num) = 0;
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virtual bool avail() = 0;
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};
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#endif /* _PART_BLK__PARTITION_TABLE_H_ */
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