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 =
  17
  18         YAFFS_TRACE_SCAN |
  19         YAFFS_TRACE_GC | YAFFS_TRACE_GC_DETAIL |
  20         YAFFS_TRACE_WRITE  | YAFFS_TRACE_ERASE |
  21         YAFFS_TRACE_TRACING |
  22         YAFFS_TRACE_ALLOCATE |
  23         YAFFS_TRACE_CHECKPOINT |
  24         YAFFS_TRACE_BAD_BLOCKS |
  25 //      (~0) |
  26
  27         0;
  28
  29
  30
  31 void yaffsfs_SetError(int err)
  32 {
  33         //Do whatever to set error
  34         errno = err;
  35 }
  36
  37 void yaffsfs_Lock(void)
  38 {
  39 }
  40
  41 void yaffsfs_Unlock(void)
  42 {
  43 }
  44
  45 __u32 yaffsfs_CurrentTime(void)
  46 {
  47         return 0;
  48 }
  49
  50 void yaffsfs_LocalInitialisation(void)
  51 {
  52         // Define locking semaphore.
  53 }
  54
  55 // Configuration for:
  56 // /ram  2MB ramdisk
  57 // /boot 2MB boot disk (flash)
  58 // /flash 14MB flash disk (flash)
  59 // NB Though /boot and /flash occupy the same physical device they
  60 // are still disticnt "yaffs_Devices. You may think of these as "partitions"
  61 // using non-overlapping areas in the same device.
  62 //
  63
  64 #include "yaffs_ramdisk.h"
  65 #include "yaffs_flashif.h"
  66 #include "yaffs_nandemul2k.h"
  67
  68 static yaffs_Device ramDev;
  69 static yaffs_Device bootDev;
  70 static yaffs_Device flashDev;
  71 static yaffs_Device ram2kDev;
  72
  73 static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
  74 #if 0
  75         { "/ram", &ramDev},
  76         { "/boot", &bootDev},
  77         { "/flash/", &flashDev},
  78         { "/ram2k", &ram2kDev},
  79         {(void *)0,(void *)0}
  80 #else
  81         { "/", &ramDev},
  82         { "/flash/boot", &bootDev},
  83         { "/flash/flash", &flashDev},
  84         { "/ram2k", &ram2kDev},
  85         {(void *)0,(void *)0} /* Null entry to terminate list */
  86 #endif
  87 };
  88
  89
  90 int yaffs_StartUp(void)
  91 {
  92         // Stuff to configure YAFFS
  93         // Stuff to initialise anything special (eg lock semaphore).
  94         yaffsfs_LocalInitialisation();
  95
  96         // Set up devices
  97         // /ram
  98         memset(&ramDev,0,sizeof(ramDev));
  99         ramDev.nDataBytesPerChunk = 512;
 100         ramDev.nChunksPerBlock = 32;
 101         ramDev.nReservedBlocks = 2; // Set this smaller for RAM
 102         ramDev.startBlock = 0; // Can use block 0
 103         ramDev.endBlock = 127; // Last block in 2MB.
 104         //ramDev.useNANDECC = 1;
 105         ramDev.nShortOpCaches = 0;      // Disable caching on this device.
 106         ramDev.genericDevice = (void *) 0;      // Used to identify the device in fstat.
 107         ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
 108         ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
 109         ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
 110         ramDev.initialiseNAND = yramdisk_InitialiseNAND;
 111
 112         // /boot
 113         memset(&bootDev,0,sizeof(bootDev));
 114         bootDev.nDataBytesPerChunk = 512;
 115         bootDev.nChunksPerBlock = 32;
 116         bootDev.nReservedBlocks = 5;
 117         bootDev.startBlock = 0; // Can use block 0
 118         bootDev.endBlock = 63; // Last block
 119         //bootDev.useNANDECC = 0; // use YAFFS's ECC
 120         bootDev.nShortOpCaches = 10; // Use caches
 121         bootDev.genericDevice = (void *) 1;     // Used to identify the device in fstat.
 122         bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
 123         bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
 124         bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
 125         bootDev.initialiseNAND = yflash_InitialiseNAND;
 126         bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
 127         bootDev.queryNANDBlock = yflash_QueryNANDBlock;
 128
 129
 130
 131         // /flash
 132         // Set this puppy up to use
 133         // the file emulation space as
 134         // 2kpage/64chunk per block/128MB device
 135         memset(&flashDev,0,sizeof(flashDev));
 136
 137         flashDev.nDataBytesPerChunk = 2048;
 138         flashDev.nChunksPerBlock = 64;
 139         flashDev.nReservedBlocks = 5;
 140         flashDev.nCheckpointReservedBlocks = 5;
 141         //flashDev.checkpointStartBlock = 1;
 142         //flashDev.checkpointEndBlock = 20;
 143         flashDev.startBlock = 0;
 144         flashDev.endBlock = 200; // Make it smaller
 145         //flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
 146         flashDev.isYaffs2 = 1;
 147         flashDev.wideTnodesDisabled=0;
 148         flashDev.nShortOpCaches = 10; // Use caches
 149         flashDev.genericDevice = (void *) 2;    // Used to identify the device in fstat.
 150         flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
 151         flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
 152         flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
 153         flashDev.initialiseNAND = yflash_InitialiseNAND;
 154         flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
 155         flashDev.queryNANDBlock = yflash_QueryNANDBlock;
 156
 157         // /ram2k
 158         // Set this puppy up to use
 159         // the file emulation space as
 160         // 2kpage/64chunk per block/128MB device
 161         memset(&ram2kDev,0,sizeof(ram2kDev));
 162
 163         ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
 164         ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
 165         ram2kDev.nReservedBlocks = 5;
 166         ram2kDev.startBlock = 0; // First block after /boot
 167         //ram2kDev.endBlock = 127; // Last block in 16MB
 168         ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
 169         ram2kDev.isYaffs2 = 1;
 170         ram2kDev.nShortOpCaches = 10; // Use caches
 171         ram2kDev.genericDevice = (void *) 3;    // Used to identify the device in fstat.
 172         ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
 173         ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
 174         ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
 175         ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
 176         ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
 177         ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
 178
 179         yaffs_initialise(yaffsfs_config);
 180
 181         return 0;
 182 }
 183
 184
 185
 186 void SetCheckpointReservedBlocks(int n)
 187 {
 188         flashDev.nCheckpointReservedBlocks = n;
 189 }
 190