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https://github.com/wiidev/usbloadergx.git
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64f8406b07
*updated libntfs (write fix) *updated libfat *lots of changes in the startup code, removed almost everything. This might cause problems for some drives at loading the gamelist and needs to be adjusted later but better this time. more cleanup is needed in main.cpp and will come. *using libogc sd/usb for config loading and reload to cIOS afterwards *added missing boothomebrew stuff pune forgot NOTE: From now on we will be doing a lot of revs which we won't be compiling and releasing. This revs are officially not available for public so don't making issues regarding those revs. Those will be closed right away. We need first to cleanup a lot of crap and update loader to new standards before releasing stuff again.
136 lines
5.2 KiB
C
136 lines
5.2 KiB
C
/*
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NTFS_CACHE.h
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The NTFS_CACHE is not visible to the user. It should be flushed
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when any file is closed or changes are made to the filesystem.
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This NTFS_CACHE implements a least-used-page replacement policy. This will
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distribute sectors evenly over the pages, so if less than the maximum
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pages are used at once, they should all eventually remain in the NTFS_CACHE.
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This also has the benefit of throwing out old sectors, so as not to keep
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too many stale pages around.
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Copyright (c) 2006 Michael "Chishm" Chisholm
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Copyright (c) 2009 shareese, rodries
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _CACHE2_H
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#define _CACHE2_H
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//#include "common.h"
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//#include "disc.h"
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#include <stddef.h>
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#include <stdint.h>
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#include <gctypes.h>
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#include <ogc/disc_io.h>
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#include <gccore.h>
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typedef struct {
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sec_t sector;
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unsigned int count;
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u64 last_access;
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bool dirty;
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u8* cache;
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} NTFS_CACHE_ENTRY;
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typedef struct {
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const DISC_INTERFACE* disc;
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sec_t endOfPartition;
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unsigned int numberOfPages;
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unsigned int sectorsPerPage;
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sec_t sectorSize;
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NTFS_CACHE_ENTRY* cacheEntries;
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} NTFS_CACHE;
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/*
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Read data from a sector in the NTFS_CACHE
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If the sector is not in the NTFS_CACHE, it will be swapped in
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offset is the position to start reading from
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size is the amount of data to read
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Precondition: offset + size <= BYTES_PER_READ
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*/
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//bool _NTFS_cache_readPartialSector (NTFS_CACHE* NTFS_CACHE, void* buffer, sec_t sector, unsigned int offset, size_t size);
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//bool _NTFS_cache_readLittleEndianValue (NTFS_CACHE* NTFS_CACHE, uint32_t *value, sec_t sector, unsigned int offset, int num_bytes);
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/*
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Write data to a sector in the NTFS_CACHE
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If the sector is not in the NTFS_CACHE, it will be swapped in.
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When the sector is swapped out, the data will be written to the disc
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offset is the position to start writing to
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size is the amount of data to write
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Precondition: offset + size <= BYTES_PER_READ
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*/
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//bool _NTFS_cache_writePartialSector (NTFS_CACHE* NTFS_CACHE, const void* buffer, sec_t sector, unsigned int offset, size_t size);
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//bool _NTFS_cache_writeLittleEndianValue (NTFS_CACHE* NTFS_CACHE, const uint32_t value, sec_t sector, unsigned int offset, int num_bytes);
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/*
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Write data to a sector in the NTFS_CACHE, zeroing the sector first
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If the sector is not in the NTFS_CACHE, it will be swapped in.
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When the sector is swapped out, the data will be written to the disc
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offset is the position to start writing to
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size is the amount of data to write
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Precondition: offset + size <= BYTES_PER_READ
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*/
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//bool _NTFS_cache_eraseWritePartialSector (NTFS_CACHE* NTFS_CACHE, const void* buffer, sec_t sector, unsigned int offset, size_t size);
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/*
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Read several sectors from the NTFS_CACHE
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*/
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bool _NTFS_cache_readSectors (NTFS_CACHE* NTFS_CACHE, sec_t sector, sec_t numSectors, void* buffer);
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/*
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Read a full sector from the NTFS_CACHE
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*/
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//static inline bool _NTFS_cache_readSector (NTFS_CACHE* NTFS_CACHE, void* buffer, sec_t sector) {
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// return _NTFS_cache_readPartialSector (NTFS_CACHE, buffer, sector, 0, BYTES_PER_READ);
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//}
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/*
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Write a full sector to the NTFS_CACHE
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*/
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//static inline bool _NTFS_cache_writeSector (NTFS_CACHE* NTFS_CACHE, const void* buffer, sec_t sector) {
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// return _NTFS_cache_writePartialSector (NTFS_CACHE, buffer, sector, 0, BYTES_PER_READ);
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//}
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bool _NTFS_cache_writeSectors (NTFS_CACHE* NTFS_CACHE, sec_t sector, sec_t numSectors, const void* buffer);
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/*
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Write any dirty sectors back to disc and clear out the contents of the NTFS_CACHE
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*/
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bool _NTFS_cache_flush (NTFS_CACHE* NTFS_CACHE);
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/*
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Clear out the contents of the NTFS_CACHE without writing any dirty sectors first
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*/
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void _NTFS_cache_invalidate (NTFS_CACHE* NTFS_CACHE);
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NTFS_CACHE* _NTFS_cache_constructor (unsigned int numberOfPages, unsigned int sectorsPerPage, const DISC_INTERFACE* discInterface, sec_t endOfPartition, sec_t sectorSize);
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void _NTFS_cache_destructor (NTFS_CACHE* NTFS_CACHE);
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#endif // _CACHE_H
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