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
  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.nDataBytesPerChunk = 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.nDataBytesPerChunk = 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.nDataBytesPerChunk = 2048;
 126         flashDev.nChunksPerBlock = 64;
 127         flashDev.nReservedBlocks = 5;
 128         flashDev.nCheckpointReservedBlocks = 5;
 129         //flashDev.checkpointStartBlock = 1;
 130         //flashDev.checkpointEndBlock = 20;
 131         flashDev.startBlock = 20;
 132         //flashDev.endBlock = 127; // Make it smaller
 133         flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
 134         flashDev.isYaffs2 = 1;
 135         flashDev.wideTnodesDisabled=0;
 136         flashDev.nShortOpCaches = 10; // Use caches
 137         flashDev.genericDevice = (void *) 2;    // Used to identify the device in fstat.
 138         flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
 139         flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
 140         flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
 141         flashDev.initialiseNAND = yflash_InitialiseNAND;
 142         flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
 143         flashDev.queryNANDBlock = yflash_QueryNANDBlock;
 144
 145         // /ram2k
 146         // Set this puppy up to use
 147         // the file emulation space as
 148         // 2kpage/64chunk per block/128MB device
 149         memset(&ram2kDev,0,sizeof(ram2kDev));
 150
 151         ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
 152         ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
 153         ram2kDev.nReservedBlocks = 5;
 154         ram2kDev.startBlock = 0; // First block after /boot
 155         //ram2kDev.endBlock = 127; // Last block in 16MB
 156         ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
 157         ram2kDev.isYaffs2 = 1;
 158         ram2kDev.nShortOpCaches = 10; // Use caches
 159         ram2kDev.genericDevice = (void *) 3;    // Used to identify the device in fstat.
 160         ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
 161         ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
 162         ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
 163         ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
 164         ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
 165         ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
 166
 167         yaffs_initialise(yaffsfs_config);
 168
 169         return 0;
 170 }
 171
 172
 173
 174 void SetCheckpointReservedBlocks(int n)
 175 {
 176         flashDev.nCheckpointReservedBlocks = n;
 177 }
 178