1 /*
2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
3 * yaffscfg.c The configuration for the "direct" use of yaffs.
4 *
5 * This file is intended to be modified to your requirements.
6 * There is no need to redistribute this file.
7 */
8
9 #include "yaffscfg.h"
10 #include "yaffsfs.h"
11 #include "yaffs_fileem2k.h"
12 #include "yaffs_nandemul2k.h"
13
14 #include <errno.h>
15
16 unsigned yaffs_traceMask = YAFFS_TRACE_SCAN | YAFFS_TRACE_GC /*| YAFFS_TRACE_GC_DETAIL | YAFFS_TRACE_WRITE */ | YAFFS_TRACE_ERASE | YAFFS_TRACE_TRACING | YAFFS_TRACE_ALLOCATE | YAFFS_TRACE_CHECKPOINT;
17 //unsigned yaffs_traceMask = ~0;
18
19
yaffsfs_SetError(int err)20 void yaffsfs_SetError(int err)
21 {
22 //Do whatever to set error
23 errno = err;
24 }
25
yaffsfs_Lock(void)26 void yaffsfs_Lock(void)
27 {
28 }
29
yaffsfs_Unlock(void)30 void yaffsfs_Unlock(void)
31 {
32 }
33
yaffsfs_CurrentTime(void)34 __u32 yaffsfs_CurrentTime(void)
35 {
36 return 0;
37 }
38
yaffsfs_LocalInitialisation(void)39 void yaffsfs_LocalInitialisation(void)
40 {
41 // Define locking semaphore.
42 }
43
44 // Configuration for:
45 // /ram 2MB ramdisk
46 // /boot 2MB boot disk (flash)
47 // /flash 14MB flash disk (flash)
48 // NB Though /boot and /flash occupy the same physical device they
49 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
50 // using non-overlapping areas in the same device.
51 //
52
53 #include "yaffs_ramdisk.h"
54 #include "yaffs_flashif.h"
55 #include "yaffs_nandemul2k.h"
56
57 static yaffs_Device ramDev;
58 static yaffs_Device bootDev;
59 static yaffs_Device flashDev;
60 static yaffs_Device ram2kDev;
61
62 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
63 #if 0
64 { "/ram", &ramDev},
65 { "/boot", &bootDev},
66 { "/flash/", &flashDev},
67 { "/ram2k", &ram2kDev},
68 {(void *)0,(void *)0}
69 #else
70 { "/", &ramDev},
71 { "/flash/boot", &bootDev},
72 { "/flash/flash", &flashDev},
73 { "/ram2k", &ram2kDev},
74 {(void *)0,(void *)0} /* Null entry to terminate list */
75 #endif
76 };
77
78
yaffs_StartUp(void)79 int yaffs_StartUp(void)
80 {
81 // Stuff to configure YAFFS
82 // Stuff to initialise anything special (eg lock semaphore).
83 yaffsfs_LocalInitialisation();
84
85 // Set up devices
86 // /ram
87 memset(&ramDev,0,sizeof(ramDev));
88 ramDev.nDataBytesPerChunk = 512;
89 ramDev.nChunksPerBlock = 32;
90 ramDev.nReservedBlocks = 2; // Set this smaller for RAM
91 ramDev.startBlock = 0; // Can use block 0
92 ramDev.endBlock = 127; // Last block in 2MB.
93 //ramDev.useNANDECC = 1;
94 ramDev.nShortOpCaches = 0; // Disable caching on this device.
95 ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
96 ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
97 ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
98 ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
99 ramDev.initialiseNAND = yramdisk_InitialiseNAND;
100
101 // /boot
102 memset(&bootDev,0,sizeof(bootDev));
103 bootDev.nDataBytesPerChunk = 512;
104 bootDev.nChunksPerBlock = 32;
105 bootDev.nReservedBlocks = 5;
106 bootDev.startBlock = 0; // Can use block 0
107 bootDev.endBlock = 63; // Last block
108 //bootDev.useNANDECC = 0; // use YAFFS's ECC
109 bootDev.nShortOpCaches = 10; // Use caches
110 bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
111 bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
112 bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
113 bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
114 bootDev.initialiseNAND = yflash_InitialiseNAND;
115 bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
116 bootDev.queryNANDBlock = yflash_QueryNANDBlock;
117
118
119
120 // /flash
121 // Set this puppy up to use
122 // the file emulation space as
123 // 2kpage/64chunk per block/128MB device
124 memset(&flashDev,0,sizeof(flashDev));
125
126 flashDev.nDataBytesPerChunk = 2048;
127 flashDev.nChunksPerBlock = 64;
128 flashDev.nReservedBlocks = 5;
129 flashDev.nCheckpointReservedBlocks = 5;
130 //flashDev.checkpointStartBlock = 1;
131 //flashDev.checkpointEndBlock = 20;
132 flashDev.startBlock = 20;
133 //flashDev.endBlock = 127; // Make it smaller
134 flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
135 flashDev.isYaffs2 = 1;
136 flashDev.wideTnodesDisabled=0;
137 flashDev.nShortOpCaches = 10; // Use caches
138 flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
139 flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
140 flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
141 flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
142 flashDev.initialiseNAND = yflash_InitialiseNAND;
143 flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
144 flashDev.queryNANDBlock = yflash_QueryNANDBlock;
145
146 // /ram2k
147 // Set this puppy up to use
148 // the file emulation space as
149 // 2kpage/64chunk per block/128MB device
150 memset(&ram2kDev,0,sizeof(ram2kDev));
151
152 ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
153 ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
154 ram2kDev.nReservedBlocks = 5;
155 ram2kDev.startBlock = 0; // First block after /boot
156 //ram2kDev.endBlock = 127; // Last block in 16MB
157 ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
158 ram2kDev.isYaffs2 = 1;
159 ram2kDev.nShortOpCaches = 10; // Use caches
160 ram2kDev.genericDevice = (void *) 3; // Used to identify the device in fstat.
161 ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
162 ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
163 ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
164 ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
165 ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
166 ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
167
168 yaffs_initialise(yaffsfs_config);
169
170 return 0;
171 }
172
173
174
SetCheckpointReservedBlocks(int n)175 void SetCheckpointReservedBlocks(int n)
176 {
177 flashDev.nCheckpointReservedBlocks = n;
178 }
179
180