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 | YAFFS_TRACE_CHECKPOINT;
  17 //unsigned yaffs_traceMask = ~0;
  18
  19
  20 void yaffsfs_SetError(int err)
  21 {
  22         //Do whatever to set error
  23         errno = err;
  24 }
  25
  26 void yaffsfs_Lock(void)
  27 {
  28 }
  29
  30 void yaffsfs_Unlock(void)
  31 {
  32 }
  33
  34 __u32 yaffsfs_CurrentTime(void)
  35 {
  36         return 0;
  37 }
  38
  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
  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
 175 void SetCheckpointReservedBlocks(int n)
 176 {
 177         flashDev.nCheckpointReservedBlocks = n;
 178 }
 179