Non-partitioned checkpointing; fix to cache small read/write problem
[yaffs2.git] / direct / yaffscfg2k.c
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;
17
18
19 void yaffsfs_SetError(int err)
20 {
21         //Do whatever to set error
22         errno = err;
23 }
24
25 void yaffsfs_Lock(void)
26 {
27 }
28
29 void yaffsfs_Unlock(void)
30 {
31 }
32
33 __u32 yaffsfs_CurrentTime(void)
34 {
35         return 0;
36 }
37
38 void yaffsfs_LocalInitialisation(void)
39 {
40         // Define locking semaphore.
41 }
42
43 // Configuration for:
44 // /ram  2MB ramdisk
45 // /boot 2MB boot disk (flash)
46 // /flash 14MB flash disk (flash)
47 // NB Though /boot and /flash occupy the same physical device they
48 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
49 // using non-overlapping areas in the same device.
50 // 
51
52 #include "yaffs_ramdisk.h"
53 #include "yaffs_flashif.h"
54 #include "yaffs_nandemul2k.h"
55
56 static yaffs_Device ramDev;
57 static yaffs_Device bootDev;
58 static yaffs_Device flashDev;
59 static yaffs_Device ram2kDev;
60
61 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
62 #if 0
63         { "/ram", &ramDev},
64         { "/boot", &bootDev},
65         { "/flash/", &flashDev},
66         { "/ram2k", &ram2kDev},
67         {(void *)0,(void *)0}
68 #else
69         { "/", &ramDev},
70         { "/flash/boot", &bootDev},
71         { "/flash/flash", &flashDev},
72         { "/ram2k", &ram2kDev},
73         {(void *)0,(void *)0} /* Null entry to terminate list */
74 #endif
75 };
76
77
78 int yaffs_StartUp(void)
79 {
80         // Stuff to configure YAFFS
81         // Stuff to initialise anything special (eg lock semaphore).
82         yaffsfs_LocalInitialisation();
83         
84         // Set up devices
85         // /ram
86         memset(&ramDev,0,sizeof(ramDev));
87         ramDev.nBytesPerChunk = 512;
88         ramDev.nChunksPerBlock = 32;
89         ramDev.nReservedBlocks = 2; // Set this smaller for RAM
90         ramDev.startBlock = 0; // Can use block 0
91         ramDev.endBlock = 127; // Last block in 2MB.    
92         //ramDev.useNANDECC = 1;
93         ramDev.nShortOpCaches = 0;      // Disable caching on this device.
94         ramDev.genericDevice = (void *) 0;      // Used to identify the device in fstat.
95         ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
96         ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
97         ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
98         ramDev.initialiseNAND = yramdisk_InitialiseNAND;
99
100         // /boot
101         memset(&bootDev,0,sizeof(bootDev));
102         bootDev.nBytesPerChunk = 512;
103         bootDev.nChunksPerBlock = 32;
104         bootDev.nReservedBlocks = 5;
105         bootDev.startBlock = 0; // Can use block 0
106         bootDev.endBlock = 63; // Last block
107         //bootDev.useNANDECC = 0; // use YAFFS's ECC
108         bootDev.nShortOpCaches = 10; // Use caches
109         bootDev.genericDevice = (void *) 1;     // Used to identify the device in fstat.
110         bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
111         bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
112         bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
113         bootDev.initialiseNAND = yflash_InitialiseNAND;
114         bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
115         bootDev.queryNANDBlock = yflash_QueryNANDBlock;
116
117
118
119         // /flash
120         // Set this puppy up to use
121         // the file emulation space as
122         // 2kpage/64chunk per block/128MB device
123         memset(&flashDev,0,sizeof(flashDev));
124
125         flashDev.nBytesPerChunk = 2048;
126         flashDev.nChunksPerBlock = 64;
127         flashDev.nReservedBlocks = 5;
128         flashDev.checkpointStartBlock = 1;
129         flashDev.checkpointEndBlock = 20;
130         flashDev.startBlock = 21; 
131         //flashDev.endBlock = 127; // Last block in 16MB
132         flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
133         flashDev.isYaffs2 = 1;
134         flashDev.wideTnodesDisabled=0;
135         flashDev.nShortOpCaches = 10; // Use caches
136         flashDev.genericDevice = (void *) 2;    // Used to identify the device in fstat.
137         flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
138         flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
139         flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
140         flashDev.initialiseNAND = yflash_InitialiseNAND;
141         flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
142         flashDev.queryNANDBlock = yflash_QueryNANDBlock;
143
144         // /ram2k
145         // Set this puppy up to use
146         // the file emulation space as
147         // 2kpage/64chunk per block/128MB device
148         memset(&ram2kDev,0,sizeof(ram2kDev));
149
150         ram2kDev.nBytesPerChunk = nandemul2k_GetBytesPerChunk();
151         ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
152         ram2kDev.nReservedBlocks = 5;
153         ram2kDev.startBlock = 0; // First block after /boot
154         //ram2kDev.endBlock = 127; // Last block in 16MB
155         ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
156         ram2kDev.isYaffs2 = 1;
157         ram2kDev.nShortOpCaches = 10; // Use caches
158         ram2kDev.genericDevice = (void *) 3;    // Used to identify the device in fstat.
159         ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
160         ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
161         ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
162         ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
163         ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
164         ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
165
166         yaffs_initialise(yaffsfs_config);
167         
168         return 0;
169 }
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