2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 * yaffscfg2k.c The configuration for the "direct" use of yaffs.
17 * This file is intended to be modified to your requirements.
18 * There is no need to redistribute this file.
23 #include "yaffs_fileem2k.h"
24 #include "yaffs_nandemul2k.h"
28 unsigned yaffs_traceMask =
31 YAFFS_TRACE_GC | YAFFS_TRACE_GC_DETAIL |
34 YAFFS_TRACE_ALLOCATE |
35 YAFFS_TRACE_CHECKPOINT |
36 YAFFS_TRACE_BAD_BLOCKS |
41 static int yaffsfs_lastError;
43 void yaffsfs_SetError(int err)
45 //Do whatever to set error
46 yaffsfs_lastError = err;
50 int yaffsfs_GetLastError(void)
52 return yaffsfs_lastError;
55 void yaffsfs_Lock(void)
59 void yaffsfs_Unlock(void)
63 __u32 yaffsfs_CurrentTime(void)
69 static int yaffs_kill_alloc = 0;
70 static size_t total_malloced = 0;
71 static size_t malloc_limit = 0 & 6000000;
73 void *yaffs_malloc(size_t size)
78 if(malloc_limit && malloc_limit <(total_malloced + size) )
83 total_malloced += size;
87 void yaffs_free(void *ptr)
92 void yaffsfs_LocalInitialisation(void)
94 // Define locking semaphore.
99 // /boot 2MB boot disk (flash)
100 // /flash 14MB flash disk (flash)
101 // NB Though /boot and /flash occupy the same physical device they
102 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
103 // using non-overlapping areas in the same device.
106 #include "yaffs_ramdisk.h"
107 #include "yaffs_flashif.h"
108 #include "yaffs_flashif2.h"
109 #include "yaffs_nandemul2k.h"
111 static yaffs_Device ramDev;
112 static yaffs_Device bootDev;
113 static yaffs_Device flashDev;
114 static yaffs_Device ram2kDev;
116 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
119 { "/boot", &bootDev},
120 { "/flash/", &flashDev},
121 { "/ram2k", &ram2kDev},
122 {(void *)0,(void *)0}
125 { "/flash/yaffs1", &bootDev},
126 { "/flash/yaffs2", &flashDev},
127 { "/ram2k", &ram2kDev},
128 { "/flash/bigblock", &flashDev},
129 {(void *)0,(void *)0} /* Null entry to terminate list */
134 int yaffs_StartUp(void)
136 // Stuff to configure YAFFS
137 // Stuff to initialise anything special (eg lock semaphore).
138 yaffsfs_LocalInitialisation();
142 memset(&ramDev,0,sizeof(ramDev));
143 ramDev.totalBytesPerChunk = 512;
144 ramDev.nChunksPerBlock = 32;
145 ramDev.nReservedBlocks = 2; // Set this smaller for RAM
146 ramDev.startBlock = 0; // Can use block 0
147 ramDev.endBlock = 127; // Last block in 2MB.
148 //ramDev.useNANDECC = 1;
149 ramDev.nShortOpCaches = 0; // Disable caching on this device.
150 ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
151 ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
152 ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
153 ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
154 ramDev.initialiseNAND = yramdisk_InitialiseNAND;
157 memset(&bootDev,0,sizeof(bootDev));
158 bootDev.totalBytesPerChunk = 512;
159 bootDev.nChunksPerBlock = 32;
160 bootDev.nReservedBlocks = 5;
161 bootDev.startBlock = 0; // Can use block 0
162 bootDev.endBlock = 63; // Last block
163 //bootDev.useNANDECC = 0; // use YAFFS's ECC
164 bootDev.nShortOpCaches = 10; // Use caches
165 bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
166 bootDev.writeChunkToNAND = yflash_WriteChunkToNAND;
167 bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
168 bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
169 bootDev.initialiseNAND = yflash_InitialiseNAND;
174 // Set this puppy up to use
175 // the file emulation space as
176 // 2kpage/64chunk per block/128MB device
177 memset(&flashDev,0,sizeof(flashDev));
179 flashDev.totalBytesPerChunk = 512;
180 flashDev.nChunksPerBlock = 64;
181 flashDev.nReservedBlocks = 5;
182 flashDev.inbandTags = 1;
183 //flashDev.checkpointStartBlock = 1;
184 //flashDev.checkpointEndBlock = 20;
185 flashDev.startBlock = 0;
186 flashDev.endBlock = 200; // Make it smaller
187 //flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
188 flashDev.isYaffs2 = 1;
189 flashDev.wideTnodesDisabled=0;
190 flashDev.nShortOpCaches = 10; // Use caches
191 flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
192 flashDev.writeChunkWithTagsToNAND = yflash2_WriteChunkWithTagsToNAND;
193 flashDev.readChunkWithTagsFromNAND = yflash2_ReadChunkWithTagsFromNAND;
194 flashDev.eraseBlockInNAND = yflash2_EraseBlockInNAND;
195 flashDev.initialiseNAND = yflash2_InitialiseNAND;
196 flashDev.markNANDBlockBad = yflash2_MarkNANDBlockBad;
197 flashDev.queryNANDBlock = yflash2_QueryNANDBlock;
200 // Set this puppy up to use
201 // the file emulation space as
202 // 2kpage/64chunk per block/128MB device
203 memset(&ram2kDev,0,sizeof(ram2kDev));
205 ram2kDev.totalBytesPerChunk = nandemul2k_GetBytesPerChunk();
206 ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
207 ram2kDev.nReservedBlocks = 5;
208 ram2kDev.startBlock = 0; // First block after /boot
209 //ram2kDev.endBlock = 127; // Last block in 16MB
210 ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
211 ram2kDev.isYaffs2 = 1;
212 ram2kDev.nShortOpCaches = 10; // Use caches
213 ram2kDev.genericDevice = (void *) 3; // Used to identify the device in fstat.
214 ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
215 ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
216 ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
217 ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
218 ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
219 ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
221 yaffs_initialise(yaffsfs_config);
228 void SetCheckpointReservedBlocks(int n)
230 // flashDev.nCheckpointReservedBlocks = n;