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 |
38 YAFFS_TRACE_VERIFY_NAND |
39 YAFFS_TRACE_VERIFY_FULL |
46 void yaffsfs_SetError(int err)
48 //Do whatever to set error
52 void yaffsfs_Lock(void)
56 void yaffsfs_Unlock(void)
60 __u32 yaffsfs_CurrentTime(void)
66 static int yaffs_kill_alloc = 0;
67 static size_t total_malloced = 0;
68 static size_t malloc_limit = 0 & 6000000;
70 void *yaffs_malloc(size_t size)
75 if(malloc_limit && malloc_limit <(total_malloced + size) )
80 total_malloced += size;
84 void yaffs_free(void *ptr)
89 void yaffsfs_LocalInitialisation(void)
91 // Define locking semaphore.
96 // /boot 2MB boot disk (flash)
97 // /flash 14MB flash disk (flash)
98 // NB Though /boot and /flash occupy the same physical device they
99 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
100 // using non-overlapping areas in the same device.
103 #include "yaffs_ramdisk.h"
104 #include "yaffs_flashif.h"
105 #include "yaffs_nandemul2k.h"
107 static yaffs_Device ramDev;
108 static yaffs_Device bootDev;
109 static yaffs_Device flashDev;
110 static yaffs_Device ram2kDev;
112 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
115 { "/boot", &bootDev},
116 { "/flash/", &flashDev},
117 { "/ram2k", &ram2kDev},
118 {(void *)0,(void *)0}
121 { "/flash/boot", &bootDev},
122 { "/flash/flash", &flashDev},
123 { "/ram2k", &ram2kDev},
124 {(void *)0,(void *)0} /* Null entry to terminate list */
129 int yaffs_StartUp(void)
131 // Stuff to configure YAFFS
132 // Stuff to initialise anything special (eg lock semaphore).
133 yaffsfs_LocalInitialisation();
137 memset(&ramDev,0,sizeof(ramDev));
138 ramDev.nDataBytesPerChunk = 512;
139 ramDev.nChunksPerBlock = 32;
140 ramDev.nReservedBlocks = 2; // Set this smaller for RAM
141 ramDev.startBlock = 0; // Can use block 0
142 ramDev.endBlock = 127; // Last block in 2MB.
143 //ramDev.useNANDECC = 1;
144 ramDev.nShortOpCaches = 0; // Disable caching on this device.
145 ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
146 ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
147 ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
148 ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
149 ramDev.initialiseNAND = yramdisk_InitialiseNAND;
152 memset(&bootDev,0,sizeof(bootDev));
153 bootDev.nDataBytesPerChunk = 512;
154 bootDev.nChunksPerBlock = 32;
155 bootDev.nReservedBlocks = 5;
156 bootDev.startBlock = 0; // Can use block 0
157 bootDev.endBlock = 63; // Last block
158 //bootDev.useNANDECC = 0; // use YAFFS's ECC
159 bootDev.nShortOpCaches = 10; // Use caches
160 bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
161 bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
162 bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
163 bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
164 bootDev.initialiseNAND = yflash_InitialiseNAND;
165 bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
166 bootDev.queryNANDBlock = yflash_QueryNANDBlock;
171 // Set this puppy up to use
172 // the file emulation space as
173 // 2kpage/64chunk per block/128MB device
174 memset(&flashDev,0,sizeof(flashDev));
176 flashDev.nDataBytesPerChunk = 2048;
177 flashDev.nChunksPerBlock = 64;
178 flashDev.nReservedBlocks = 5;
179 flashDev.nCheckpointReservedBlocks = 5;
180 //flashDev.checkpointStartBlock = 1;
181 //flashDev.checkpointEndBlock = 20;
182 flashDev.startBlock = 0;
183 flashDev.endBlock = 200; // Make it smaller
184 //flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
185 flashDev.isYaffs2 = 1;
186 flashDev.wideTnodesDisabled=0;
187 flashDev.nShortOpCaches = 10; // Use caches
188 flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
189 flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
190 flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
191 flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
192 flashDev.initialiseNAND = yflash_InitialiseNAND;
193 flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
194 flashDev.queryNANDBlock = yflash_QueryNANDBlock;
197 // Set this puppy up to use
198 // the file emulation space as
199 // 2kpage/64chunk per block/128MB device
200 memset(&ram2kDev,0,sizeof(ram2kDev));
202 ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
203 ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
204 ram2kDev.nReservedBlocks = 5;
205 ram2kDev.startBlock = 0; // First block after /boot
206 //ram2kDev.endBlock = 127; // Last block in 16MB
207 ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
208 ram2kDev.isYaffs2 = 1;
209 ram2kDev.nShortOpCaches = 10; // Use caches
210 ram2kDev.genericDevice = (void *) 3; // Used to identify the device in fstat.
211 ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
212 ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
213 ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
214 ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
215 ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
216 ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
218 yaffs_initialise(yaffsfs_config);
225 void SetCheckpointReservedBlocks(int n)
227 flashDev.nCheckpointReservedBlocks = n;