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"
25 #include "yaffs_norif1.h"
29 unsigned yaffs_traceMask =
36 YAFFS_TRACE_ALLOCATE |
37 YAFFS_TRACE_CHECKPOINT |
38 YAFFS_TRACE_BAD_BLOCKS |
45 static int yaffsfs_lastError;
47 void yaffsfs_SetError(int err)
49 //Do whatever to set error
50 yaffsfs_lastError = err;
54 int yaffsfs_GetLastError(void)
56 return yaffsfs_lastError;
59 void yaffsfs_Lock(void)
63 void yaffsfs_Unlock(void)
67 __u32 yaffsfs_CurrentTime(void)
73 static int yaffs_kill_alloc = 0;
74 static size_t total_malloced = 0;
75 static size_t malloc_limit = 0 & 6000000;
77 void *yaffs_malloc(size_t size)
82 if(malloc_limit && malloc_limit <(total_malloced + size) )
87 total_malloced += size;
91 void yaffs_free(void *ptr)
96 void yaffsfs_LocalInitialisation(void)
98 // Define locking semaphore.
101 // Configuration for:
103 // /boot 2MB boot disk (flash)
104 // /flash 14MB flash disk (flash)
105 // NB Though /boot and /flash occupy the same physical device they
106 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
107 // using non-overlapping areas in the same device.
110 #include "yaffs_ramdisk.h"
111 #include "yaffs_flashif.h"
112 #include "yaffs_flashif2.h"
113 #include "yaffs_nandemul2k.h"
115 static yaffs_Device ram1Dev;
116 static yaffs_Device nand2;
117 static yaffs_Device flashDev;
118 static yaffs_Device ram2kDev;
119 static yaffs_Device m18_1Dev;
121 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
123 { "/ram1", &ram1Dev},
124 { "/M18-1", &m18_1Dev},
125 { "/yaffs2", &flashDev},
126 { "/ram2k", &ram2kDev},
127 {(void *)0,(void *)0} /* Null entry to terminate list */
131 int yaffs_StartUp(void)
133 // Stuff to configure YAFFS
134 // Stuff to initialise anything special (eg lock semaphore).
135 yaffsfs_LocalInitialisation();
139 memset(&ram1Dev,0,sizeof(ram1Dev));
140 ram1Dev.totalBytesPerChunk = 512;
141 ram1Dev.nChunksPerBlock = 32;
142 ram1Dev.nReservedBlocks = 2; // Set this smaller for RAM
143 ram1Dev.startBlock = 0; // Can use block 0
144 ram1Dev.endBlock = 127; // Last block in 2MB.
145 //ram1Dev.useNANDECC = 1;
146 ram1Dev.nShortOpCaches = 0; // Disable caching on this device.
147 ram1Dev.genericDevice = (void *) 0; // Used to identify the device in fstat.
148 ram1Dev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
149 ram1Dev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
150 ram1Dev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
151 ram1Dev.initialiseNAND = yramdisk_InitialiseNAND;
153 // /M18-1 yaffs1 on M18 nor sim
154 memset(&m18_1Dev,0,sizeof(m18_1Dev));
155 m18_1Dev.totalBytesPerChunk = 1024;
156 m18_1Dev.nChunksPerBlock =248;
157 m18_1Dev.nReservedBlocks = 2;
158 m18_1Dev.startBlock = 0; // Can use block 0
159 m18_1Dev.endBlock = 31; // Last block
160 m18_1Dev.useNANDECC = 0; // use YAFFS's ECC
161 m18_1Dev.nShortOpCaches = 10; // Use caches
162 m18_1Dev.genericDevice = (void *) 1; // Used to identify the device in fstat.
163 m18_1Dev.writeChunkToNAND = ynorif1_WriteChunkToNAND;
164 m18_1Dev.readChunkFromNAND = ynorif1_ReadChunkFromNAND;
165 m18_1Dev.eraseBlockInNAND = ynorif1_EraseBlockInNAND;
166 m18_1Dev.initialiseNAND = ynorif1_InitialiseNAND;
167 m18_1Dev.deinitialiseNAND = ynorif1_DeinitialiseNAND;
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.totalBytesPerChunk = 512;
177 flashDev.nChunksPerBlock = 64;
178 flashDev.nReservedBlocks = 5;
179 flashDev.inbandTags = 1;
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 = yflash2_WriteChunkWithTagsToNAND;
190 flashDev.readChunkWithTagsFromNAND = yflash2_ReadChunkWithTagsFromNAND;
191 flashDev.eraseBlockInNAND = yflash2_EraseBlockInNAND;
192 flashDev.initialiseNAND = yflash2_InitialiseNAND;
193 flashDev.markNANDBlockBad = yflash2_MarkNANDBlockBad;
194 flashDev.queryNANDBlock = yflash2_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.totalBytesPerChunk = 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;