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authorNebuleon Fumika2013-02-03 04:19:11 -0500
committerNebuleon Fumika2013-02-03 04:19:11 -0500
commit8693ae1bd880a758eb2efec4fccd32f89593855d (patch)
tree660b7ceed1789fc904332b96a2a4006b0e4cc6b8 /sdk-modifications/include/file_allocation_table.h
parent02f8184fe07d99cceb85f4abd3ef0e5e3765b5ea (diff)
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Add SDK modifications by BassAceGold as of 2011-04-14, as well as modified DMA functions as of 2013-01-29.
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+/*
+ file_allocation_table.h
+ Reading, writing and manipulation of the FAT structure on
+ a FAT partition
+
+ Copyright (c) 2006 Michael "Chishm" Chisholm
+
+ 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.
+ 3. The name of the author may not be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+
+ 2006-07-11 - Chishm
+ * Original release
+
+ 2006-10-01 - Chishm
+ * Added _FAT_fat_linkFreeClusterCleared to clear a cluster when it is allocated
+*/
+
+#ifndef _FAT_H
+#define _FAT_H
+
+#include "fs_common.h"
+#include "partition.h"
+
+#define CLUSTER_EOF_16 0xFFFF
+#define CLUSTER_EOF 0x0FFFFFFF
+#define CLUSTER_FREE 0x0000
+#define CLUSTER_FIRST 0x0002
+
+#define CLUSTERS_PER_FAT12 4085
+#define CLUSTERS_PER_FAT16 65525
+
+
+u32 _FAT_fat_nextCluster(PARTITION* partition, u32 cluster);
+
+u32 _FAT_fat_linkFreeCluster(PARTITION* partition, u32 cluster);
+u32 _FAT_fat_linkFreeClusterCleared (PARTITION* partition, u32 cluster);
+
+bool _FAT_fat_clearLinks (PARTITION* partition, u32 cluster);
+
+u32 _FAT_fat_lastCluster (PARTITION* partition, u32 cluster);
+
+static inline u32 _FAT_fat_clusterToSector (PARTITION* partition, u32 cluster) {
+ return (cluster >= 2) ? ((cluster - 2) * partition->sectorsPerCluster) + partition->dataStart : partition->rootDirStart;
+}
+
+#endif // _FAT_H