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_nandemul2k.h"
110 static yaffs_Device ramDev;
111 static yaffs_Device bootDev;
112 static yaffs_Device flashDev;
113 static yaffs_Device ram2kDev;
115 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
118 { "/boot", &bootDev},
119 { "/flash/", &flashDev},
120 { "/ram2k", &ram2kDev},
121 {(void *)0,(void *)0}
124 { "/flash/boot", &bootDev},
125 { "/flash/flash", &flashDev},
126 { "/ram2k", &ram2kDev},
127 { "/flash/bigblock", &flashDev},
128 {(void *)0,(void *)0} /* Null entry to terminate list */
133 int yaffs_StartUp(void)
135 // Stuff to configure YAFFS
136 // Stuff to initialise anything special (eg lock semaphore).
137 yaffsfs_LocalInitialisation();
141 memset(&ramDev,0,sizeof(ramDev));
142 ramDev.totalBytesPerChunk = 512;
143 ramDev.nChunksPerBlock = 32;
144 ramDev.nReservedBlocks = 2; // Set this smaller for RAM
145 ramDev.startBlock = 0; // Can use block 0
146 ramDev.endBlock = 127; // Last block in 2MB.
147 //ramDev.useNANDECC = 1;
148 ramDev.nShortOpCaches = 0; // Disable caching on this device.
149 ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
150 ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
151 ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
152 ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
153 ramDev.initialiseNAND = yramdisk_InitialiseNAND;
156 memset(&bootDev,0,sizeof(bootDev));
157 bootDev.totalBytesPerChunk = 512;
158 bootDev.nChunksPerBlock = 32;
159 bootDev.nReservedBlocks = 5;
160 bootDev.startBlock = 0; // Can use block 0
161 bootDev.endBlock = 63; // Last block
162 //bootDev.useNANDECC = 0; // use YAFFS's ECC
163 bootDev.nShortOpCaches = 10; // Use caches
164 bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
165 bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
166 bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
167 bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
168 bootDev.initialiseNAND = yflash_InitialiseNAND;
169 bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
170 bootDev.queryNANDBlock = yflash_QueryNANDBlock;
175 // Set this puppy up to use
176 // the file emulation space as
177 // 2kpage/64chunk per block/128MB device
178 memset(&flashDev,0,sizeof(flashDev));
180 flashDev.totalBytesPerChunk = 512;
181 flashDev.nChunksPerBlock = 64;
182 flashDev.nReservedBlocks = 5;
183 flashDev.inbandTags = 1;
184 //flashDev.checkpointStartBlock = 1;
185 //flashDev.checkpointEndBlock = 20;
186 flashDev.startBlock = 0;
187 flashDev.endBlock = 200; // Make it smaller
188 //flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
189 flashDev.isYaffs2 = 1;
190 flashDev.wideTnodesDisabled=0;
191 flashDev.nShortOpCaches = 10; // Use caches
192 flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
193 flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
194 flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
195 flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
196 flashDev.initialiseNAND = yflash_InitialiseNAND;
197 flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
198 flashDev.queryNANDBlock = yflash_QueryNANDBlock;
201 // Set this puppy up to use
202 // the file emulation space as
203 // 2kpage/64chunk per block/128MB device
204 memset(&ram2kDev,0,sizeof(ram2kDev));
206 ram2kDev.totalBytesPerChunk = nandemul2k_GetBytesPerChunk();
207 ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
208 ram2kDev.nReservedBlocks = 5;
209 ram2kDev.startBlock = 0; // First block after /boot
210 //ram2kDev.endBlock = 127; // Last block in 16MB
211 ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
212 ram2kDev.isYaffs2 = 1;
213 ram2kDev.nShortOpCaches = 10; // Use caches
214 ram2kDev.genericDevice = (void *) 3; // Used to identify the device in fstat.
215 ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
216 ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
217 ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
218 ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
219 ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
220 ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
222 yaffs_initialise(yaffsfs_config);
229 void SetCheckpointReservedBlocks(int n)
231 // flashDev.nCheckpointReservedBlocks = n;